Merge pull request #710 from damemi/update-helm-23

[release-1.23] Update helm chart version to v0.23

.gitignore

@@ -4,3 +4,4 @@ vendordiff.patch
 .idea/
 *.code-workspace
 .vscode/
+kind

Dockerfile

@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-FROM golang:1.16.1
+FROM golang:1.17.3
 
 WORKDIR /go/src/sigs.k8s.io/descheduler
 COPY . .

Makefile

@@ -24,8 +24,8 @@ ARCHS = amd64 arm arm64
 
 LDFLAGS=-ldflags "-X ${LDFLAG_LOCATION}.version=${VERSION} -X ${LDFLAG_LOCATION}.buildDate=${BUILD} -X ${LDFLAG_LOCATION}.gitbranch=${BRANCH} -X ${LDFLAG_LOCATION}.gitsha1=${SHA1}"
 
-GOLANGCI_VERSION := v1.30.0
-HAS_GOLANGCI := $(shell ls _output/bin/golangci-lint)
+GOLANGCI_VERSION := v1.43.0
+HAS_GOLANGCI := $(shell ls _output/bin/golangci-lint 2> /dev/null)
 
 # REGISTRY is the container registry to push
 # into. The default is to push to the staging
@@ -43,7 +43,7 @@ IMAGE_GCLOUD:=$(REGISTRY)/descheduler:$(VERSION)
 # In the future binaries can be uploaded to
 # GCS bucket gs://k8s-staging-descheduler.
 
-HAS_HELM := $(shell which helm)
+HAS_HELM := $(shell which helm 2> /dev/null)
 
 all: build
 
@@ -127,18 +127,21 @@ gen:
 verify-gen:
 	./hack/verify-conversions.sh
 	./hack/verify-deep-copies.sh
+	./hack/verify-defaulters.sh
 
 lint:
 ifndef HAS_GOLANGCI
-	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b ./_output/bin ${GOLANGCI_VERSION}
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b ./_output/bin ${GOLANGCI_VERSION}
 endif
 	./_output/bin/golangci-lint run
 
-lint-chart:
-ifndef HAS_HELM
-	curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 && chmod 700 ./get_helm.sh && ./get_helm.sh
-endif
+lint-chart: ensure-helm-install
 	helm lint ./charts/descheduler
 
-test-helm:
+test-helm: ensure-helm-install
 	./test/run-helm-tests.sh
+
+ensure-helm-install:
+ifndef HAS_HELM
+	curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 && chmod 700 ./get_helm.sh && ./get_helm.sh
+endif

README.md

@@ -1,4 +1,4 @@
-[![Go Report Card](https://goreportcard.com/badge/kubernetes-sigs/descheduler)](https://goreportcard.com/report/sigs.k8s.io/descheduler)
+[![Go Report Card](https://goreportcard.com/badge/sigs.k8s.io/descheduler)](https://goreportcard.com/report/sigs.k8s.io/descheduler)
 ![Release Charts](https://github.com/kubernetes-sigs/descheduler/workflows/Release%20Charts/badge.svg)
 
 # Descheduler for Kubernetes
@@ -42,6 +42,7 @@ Table of Contents
   - [RemovePodsViolatingTopologySpreadConstraint](#removepodsviolatingtopologyspreadconstraint)
   - [RemovePodsHavingTooManyRestarts](#removepodshavingtoomanyrestarts)
   - [PodLifeTime](#podlifetime)
+  - [RemoveFailedPods](#removefailedpods)
 - [Filter Pods](#filter-pods)
   - [Namespace filtering](#namespace-filtering)
   - [Priority filtering](#priority-filtering)
@@ -102,17 +103,17 @@ See the [resources | Kustomize](https://kubectl.docs.kubernetes.io/references/ku
 
 Run As A Job
 ```
-kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/job?ref=v0.21.0' | kubectl apply -f -
+kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/job?ref=v0.22.0' | kubectl apply -f -
 ```
 
 Run As A CronJob
 ```
-kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/cronjob?ref=v0.21.0' | kubectl apply -f -
+kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/cronjob?ref=v0.22.0' | kubectl apply -f -
 ```
 
 Run As A Deployment
 ```
-kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/deployment?ref=v0.21.0' | kubectl apply -f -
+kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/deployment?ref=v0.22.0' | kubectl apply -f -
 ```
 
 ## User Guide
@@ -121,36 +122,28 @@ See the [user guide](docs/user-guide.md) in the `/docs` directory.
 
 ## Policy and Strategies
 
-Descheduler's policy is configurable and includes strategies that can be enabled or disabled.
-Nine strategies
-1. `RemoveDuplicates`
-2. `LowNodeUtilization`
-3. `HighNodeUtilization`
-4. `RemovePodsViolatingInterPodAntiAffinity`
-5. `RemovePodsViolatingNodeAffinity`
-6. `RemovePodsViolatingNodeTaints`
-7. `RemovePodsViolatingTopologySpreadConstraint`
-8. `RemovePodsHavingTooManyRestarts`
-9. `PodLifeTime`  
-are currently implemented. As part of the policy, the
-parameters associated with the strategies can be configured too. By default, all strategies are enabled.
+Descheduler's policy is configurable and includes strategies that can be enabled or disabled. By default, all strategies are enabled.
 
-The following diagram provides a visualization of most of the strategies to help
-categorize how strategies fit together.
+The policy includes a common configuration that applies to all the strategies:
+| Name | Default Value | Description |
+|------|---------------|-------------|
+| `nodeSelector` | `nil` | limiting the nodes which are processed |
+| `evictLocalStoragePods` | `false` | allows eviction of pods with local storage |
+| `evictSystemCriticalPods` | `false` | [Warning: Will evict Kubernetes system pods] allows eviction of pods with any priority, including system pods like kube-dns |
+| `ignorePvcPods` | `false` | set whether PVC pods should be evicted or ignored |
+| `maxNoOfPodsToEvictPerNode` | `nil` | maximum number of pods evicted from each node (summed through all strategies) |
+| `evictFailedBarePods` | `false` | allow eviction of pods without owner references and in failed phase |
 
-![Strategies diagram](strategies_diagram.png)
+As part of the policy, the parameters associated with each strategy can be configured.
+See each strategy for details on available parameters.
 
-The policy also includes common configuration for all the strategies:
-- `nodeSelector` - limiting the nodes which are processed
-- `evictLocalStoragePods` - allows eviction of pods with local storage
-- `evictSystemCriticalPods` - [Warning: Will evict Kubernetes system pods] allows eviction of pods with any priority, including system pods like kube-dns
-- `ignorePvcPods` - set whether PVC pods should be evicted or ignored (defaults to `false`)
-- `maxNoOfPodsToEvictPerNode` - maximum number of pods evicted from each node (summed through all strategies)
+**Policy:**
 
 ```yaml
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 nodeSelector: prod=dev
+evictFailedBarePods: false
 evictLocalStoragePods: true
 evictSystemCriticalPods: true
 maxNoOfPodsToEvictPerNode: 40
@@ -159,6 +152,11 @@ strategies:
   ...
 ```
 
+The following diagram provides a visualization of most of the strategies to help
+categorize how strategies fit together.
+
+![Strategies diagram](strategies_diagram.png)
+
 ### RemoveDuplicates
 
 This strategy makes sure that there is only one pod associated with a ReplicaSet (RS),
@@ -267,9 +265,11 @@ under utilized frequently or for a short period of time. By default, `numberOfNo
 
 ### HighNodeUtilization
 
-This strategy finds nodes that are under utilized and evicts pods in the hope that these pods will be scheduled compactly into fewer nodes.
-This strategy **must** be used with the
-scheduler strategy `MostRequestedPriority`. The parameters of this strategy are configured under `nodeResourceUtilizationThresholds`.
+This strategy finds nodes that are under utilized and evicts pods from the nodes in the hope that these pods will be 
+scheduled compactly into fewer nodes.  Used in conjunction with node auto-scaling, this strategy is intended to help 
+trigger down scaling of under utilized nodes.
+This strategy **must** be used with the scheduler strategy `MostRequestedPriority`. The parameters of this strategy are 
+configured under `nodeResourceUtilizationThresholds`.
 
 The under utilization of nodes is determined by a configurable threshold `thresholds`. The threshold
 `thresholds` can be configured for cpu, memory, number of pods, and extended resources in terms of percentage. The percentage is
@@ -458,9 +458,9 @@ strategies:
 
 This strategy makes sure that pods having too many restarts are removed from nodes. For example a pod with EBS/PD that
 can't get the volume/disk attached to the instance, then the pod should be re-scheduled to other nodes. Its parameters
-include `podRestartThreshold`, which is the number of restarts at which a pod should be evicted, and `includingInitContainers`,
-which determines whether init container restarts should be factored into that calculation.
-|`labelSelector`|(see [label filtering](#label-filtering))|
+include `podRestartThreshold`, which is the number of restarts (summed over all eligible containers) at which a pod
+should be evicted, and `includingInitContainers`, which determines whether init container restarts should be factored
+into that calculation.
 
 **Parameters:**
 
@@ -471,6 +471,7 @@ which determines whether init container restarts should be factored into that ca
 |`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
 |`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
 |`namespaces`|(see [namespace filtering](#namespace-filtering))|
+|`labelSelector`|(see [label filtering](#label-filtering))|
 |`nodeFit`|bool (see [node fit filtering](#node-fit-filtering))|
 
 **Example:**
@@ -520,6 +521,47 @@ strategies:
          - "Pending"
 ```
 
+### RemoveFailedPods
+
+This strategy evicts pods that are in failed status phase.
+You can provide an optional parameter to filter by failed `reasons`.
+`reasons` can be expanded to include reasons of InitContainers as well by setting the optional parameter `includingInitContainers` to `true`.
+You can specify an optional parameter `minPodLifetimeSeconds` to evict pods that are older than specified seconds.
+Lastly, you can specify the optional parameter `excludeOwnerKinds` and if a pod
+has any of these `Kind`s listed as an `OwnerRef`, that pod will not be considered for eviction.
+
+**Parameters:**
+
+|Name|Type|
+|---|---|
+|`minPodLifetimeSeconds`|uint|
+|`excludeOwnerKinds`|list(string)|
+|`reasons`|list(string)|
+|`includingInitContainers`|bool|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+|`namespaces`|(see [namespace filtering](#namespace-filtering))|
+|`labelSelector`|(see [label filtering](#label-filtering))|
+|`nodeFit`|bool (see [node fit filtering](#node-fit-filtering))|
+
+**Example:**
+
+```yaml
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "RemoveFailedPods":
+     enabled: true
+     params:
+       failedPods:
+         reasons:
+         - "NodeAffinity"
+         includingInitContainers: true
+         excludeOwnerKinds:
+         - "Job"
+         minPodLifetimeSeconds: 3600
+```
+
 ## Filter Pods
 
 ### Namespace filtering
@@ -532,6 +574,7 @@ The following strategies accept a `namespaces` parameter which allows to specify
 * `RemovePodsViolatingInterPodAntiAffinity`
 * `RemoveDuplicates`
 * `RemovePodsViolatingTopologySpreadConstraint`
+* `RemoveFailedPods`
 
 For example:
 
@@ -614,7 +657,7 @@ does not exist, descheduler won't create it and will throw an error.
 
 ### Label filtering
 
-The following strategies can configure a [standard kubernetes labelSelector](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.21/#labelselector-v1-meta)
+The following strategies can configure a [standard kubernetes labelSelector](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.22/#labelselector-v1-meta)
 to filter pods by their labels:
 
 * `PodLifeTime`
@@ -623,6 +666,7 @@ to filter pods by their labels:
 * `RemovePodsViolatingNodeAffinity`
 * `RemovePodsViolatingInterPodAntiAffinity`
 * `RemovePodsViolatingTopologySpreadConstraint`
+* `RemoveFailedPods`
 
 This allows running strategies among pods the descheduler is interested in.
 
@@ -657,6 +701,7 @@ The following strategies accept a `nodeFit` boolean parameter which can optimize
 * `RemovePodsViolatingNodeTaints`
 * `RemovePodsViolatingTopologySpreadConstraint`
 * `RemovePodsHavingTooManyRestarts`
+* `RemoveFailedPods`
 
  If set to `true` the descheduler will consider whether or not the pods that meet eviction criteria will fit on other nodes before evicting them. If a pod cannot be rescheduled to another node, it will not be evicted. Currently the following criteria are considered when setting `nodeFit` to `true`:
 - A `nodeSelector` on the pod
@@ -697,8 +742,8 @@ Using Deployments instead of ReplicationControllers provides an automated rollou
 When the descheduler decides to evict pods from a node, it employs the following general mechanism:
 
 * [Critical pods](https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/) (with priorityClassName set to system-cluster-critical or system-node-critical) are never evicted (unless `evictSystemCriticalPods: true` is set).
-* Pods (static or mirrored pods or stand alone pods) not part of an ReplicationController, ReplicaSet(Deployment), StatefulSet, or Job are
-never evicted because these pods won't be recreated.
+* Pods (static or mirrored pods or standalone pods) not part of an ReplicationController, ReplicaSet(Deployment), StatefulSet, or Job are
+never evicted because these pods won't be recreated. (Standalone pods in failed status phase can be evicted by setting `evictFailedBarePods: true`)
 * Pods associated with DaemonSets are never evicted.
 * Pods with local storage are never evicted (unless `evictLocalStoragePods: true` is set).
 * Pods with PVCs are evicted (unless `ignorePvcPods: true` is set).
@@ -707,6 +752,7 @@ best effort pods are evicted before burstable and guaranteed pods.
 * All types of pods with the annotation `descheduler.alpha.kubernetes.io/evict` are eligible for eviction. This
   annotation is used to override checks which prevent eviction and users can select which pod is evicted.
   Users should know how and if the pod will be recreated.
+* Pods with a non-nil DeletionTimestamp are not evicted by default.
 
 Setting `--v=4` or greater on the Descheduler will log all reasons why any pod is not evictable.
 
@@ -736,6 +782,7 @@ packages that it is compiled with.
 
 Descheduler  | Supported Kubernetes Version
 -------------|-----------------------------
+v0.22        | v1.22
 v0.21        | v1.21
 v0.20        | v1.20
 v0.19        | v1.19

charts/descheduler/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 name: descheduler
-version: 0.21.0
-appVersion: 0.21.0
+version: 0.23.0
+appVersion: 0.23.0
 description: Descheduler for Kubernetes is used to rebalance clusters by evicting pods that can potentially be scheduled on better nodes. In the current implementation, descheduler does not schedule replacement of evicted pods but relies on the default scheduler for that.
 keywords:
 - kubernetes

charts/descheduler/README.md

@@ -45,9 +45,11 @@ The following table lists the configurable parameters of the _descheduler_ chart
 
 | Parameter                      | Description                                                                                                           | Default                              |
 | ------------------------------ | --------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
+| `kind`                         | Use as CronJob or Deployment                                                                                          | `CronJob`                            |
 | `image.repository`             | Docker repository to use                                                                                              | `k8s.gcr.io/descheduler/descheduler` |
 | `image.tag`                    | Docker tag to use                                                                                                     | `v[chart appVersion]`                |
 | `image.pullPolicy`             | Docker image pull policy                                                                                              | `IfNotPresent`                       |
+| `imagePullSecrets`             | Docker repository secrets                                                                                             | `[]`                                 |
 | `nameOverride`                 | String to partially override `descheduler.fullname` template (will prepend the release name)                          | `""`                                 |
 | `fullnameOverride`             | String to fully override `descheduler.fullname` template                                                              | `""`                                 |
 | `cronJobApiVersion`            | CronJob API Group Version                                                                                             | `"batch/v1"`                         |
@@ -55,6 +57,7 @@ The following table lists the configurable parameters of the _descheduler_ chart
 | `startingDeadlineSeconds`      | If set, configure `startingDeadlineSeconds` for the _descheduler_ job                                                 | `nil`                                |
 | `successfulJobsHistoryLimit`   | If set, configure `successfulJobsHistoryLimit` for the _descheduler_ job                                              | `nil`                                |
 | `failedJobsHistoryLimit`       | If set, configure `failedJobsHistoryLimit` for the _descheduler_ job                                                  | `nil`                                |
+| `deschedulingInterval`         | If using kind:Deployment, sets time between consecutive descheduler executions.                                       | `5m`                                 |
 | `cmdOptions`                   | The options to pass to the _descheduler_ command                                                                      | _see values.yaml_                    |
 | `deschedulerPolicy.strategies` | The _descheduler_ strategies to apply                                                                                 | _see values.yaml_                    |
 | `priorityClassName`            | The name of the priority class to add to pods                                                                         | `system-cluster-critical`            |
@@ -64,3 +67,6 @@ The following table lists the configurable parameters of the _descheduler_ chart
 | `serviceAccount.create`        | If `true`, create a service account for the cron job                                                                  | `true`                               |
 | `serviceAccount.name`          | The name of the service account to use, if not set and create is true a name is generated using the fullname template | `nil`                                |
 | `nodeSelector`                 | Node selectors to run the descheduler cronjob on specific nodes                                                       | `nil`                                |
+| `tolerations`                  | tolerations to run the descheduler cronjob on specific nodes                                                          | `nil`                                |
+| `suspend`                      | Set spec.suspend in descheduler cronjob                                                                               | `false`                              |
+| `commonLabels`                 | Labels to apply to all resources                                                                                      | `{}`                                 |

charts/descheduler/templates/NOTES.txt

@@ -1 +1 @@
-Descheduler installed as a cron job.
+Descheduler installed as a {{ .Values.kind }} .

charts/descheduler/templates/_helpers.tpl

@@ -42,6 +42,17 @@ app.kubernetes.io/instance: {{ .Release.Name }}
 app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
 {{- end }}
 app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- if .Values.commonLabels}}
+{{ toYaml .Values.commonLabels }}
+{{- end }}
+{{- end -}}
+
+{{/*
+Selector labels
+*/}}
+{{- define "descheduler.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "descheduler.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
 {{- end -}}
 
 {{/*

charts/descheduler/templates/cronjob.yaml

@@ -1,3 +1,4 @@
+{{- if eq .Values.kind "CronJob" }}
 apiVersion: {{ .Values.cronJobApiVersion | default "batch/v1" }}
 kind: CronJob
 metadata:
@@ -6,6 +7,9 @@ metadata:
     {{- include "descheduler.labels" . | nindent 4 }}
 spec:
   schedule: {{ .Values.schedule | quote }}
+  {{- if .Values.suspend }}
+  suspend: {{ .Values.suspend }}
+  {{- end }}
   concurrencyPolicy: "Forbid"
   {{- if .Values.startingDeadlineSeconds }}
   startingDeadlineSeconds: {{ .Values.startingDeadlineSeconds }}
@@ -27,8 +31,7 @@ spec:
             {{- .Values.podAnnotations | toYaml | nindent 12 }}
             {{- end }}
           labels:
-            app.kubernetes.io/name: {{ include "descheduler.name" . }}
-            app.kubernetes.io/instance: {{ .Release.Name }}
+            {{- include "descheduler.selectorLabels" . | nindent 12 }}
             {{- if .Values.podLabels }}
             {{- .Values.podLabels | toYaml | nindent 12 }}
             {{- end }}
@@ -37,11 +40,23 @@ spec:
           nodeSelector:
             {{- toYaml . | nindent 12 }}
           {{- end }}
+          {{- with .Values.affinity }}
+          affinity:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          {{- with .Values.tolerations }}
+          tolerations:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
           {{- if .Values.priorityClassName }}
           priorityClassName: {{ .Values.priorityClassName }}
           {{- end }}
           serviceAccountName: {{ template "descheduler.serviceAccountName" . }}
           restartPolicy: "Never"
+          {{- with .Values.imagePullSecrets }}
+          imagePullSecrets:
+          {{- toYaml . | nindent 10 }}
+          {{- end }}
           containers:
             - name: {{ .Chart.Name }}
               image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default (printf "v%s" .Chart.AppVersion) }}"
@@ -57,6 +72,8 @@ spec:
                 - {{ $value | quote }}
                 {{- end }}
                 {{- end }}
+              livenessProbe:
+                {{- toYaml .Values.livenessProbe | nindent 16 }}
               resources:
                 {{- toYaml .Values.resources | nindent 16 }}
               securityContext:
@@ -74,3 +91,4 @@ spec:
           - name: policy-volume
             configMap:
               name: {{ template "descheduler.fullname" . }}
+{{- end }}

charts/descheduler/templates/deployment.yaml

@@ -0,0 +1,81 @@
+{{- if eq .Values.kind "Deployment" }}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ template "descheduler.fullname" . }}
+  labels:
+    {{- include "descheduler.labels" . | nindent 4 }}
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      {{- include "descheduler.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        {{- include "descheduler.selectorLabels" . | nindent 8 }}
+        {{- if .Values.podLabels }}
+        {{- .Values.podLabels | toYaml | nindent 8 }}
+        {{- end }}
+      annotations:
+        checksum/config: {{ include (print $.Template.BasePath "/configmap.yaml") . | sha256sum }}
+        {{- if .Values.podAnnotations }}
+        {{- .Values.podAnnotations | toYaml | nindent 8 }}
+        {{- end }}
+    spec:
+      {{- if .Values.priorityClassName }}
+      priorityClassName: {{ .Values.priorityClassName }}
+      {{- end }}
+      serviceAccountName: {{ template "descheduler.serviceAccountName" . }}
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default (printf "v%s" .Chart.AppVersion) }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          command:
+            - "/bin/descheduler"
+          args:
+            - "--policy-config-file"
+            - "/policy-dir/policy.yaml"
+            - "--descheduling-interval"
+            - {{ required "deschedulingInterval required for running as Deployment" .Values.deschedulingInterval }}
+            {{- range $key, $value := .Values.cmdOptions }}
+            - {{ printf "--%s" $key | quote }}
+            {{- if $value }}
+            - {{ $value | quote }}
+            {{- end }}
+            {{- end }}
+          ports:
+            - containerPort: 10258
+              protocol: TCP
+          livenessProbe:
+            {{- toYaml .Values.livenessProbe | nindent 12 }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          securityContext:
+            allowPrivilegeEscalation: false
+            capabilities:
+              drop:
+                - ALL
+            privileged: false
+            readOnlyRootFilesystem: true
+            runAsNonRoot: true
+          volumeMounts:
+            - mountPath: /policy-dir
+              name: policy-volume
+      volumes:
+        - name: policy-volume
+          configMap:
+            name: {{ template "descheduler.fullname" . }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+{{- end }}

charts/descheduler/templates/serviceaccount.yaml

@@ -5,4 +5,7 @@ metadata:
   name: {{ template "descheduler.serviceAccountName" . }}
   labels:
     {{- include "descheduler.labels" . | nindent 4 }}
+{{- if .Values.serviceAccount.annotations }}
+  annotations: {{ toYaml .Values.serviceAccount.annotations | nindent 4 }}
+{{- end }}
 {{- end -}}

charts/descheduler/values.yaml

@@ -2,12 +2,17 @@
 # This is a YAML-formatted file.
 # Declare variables to be passed into your templates.
 
+# CronJob or Deployment
+kind: CronJob
+
 image:
   repository: k8s.gcr.io/descheduler/descheduler
   # Overrides the image tag whose default is the chart version
   tag: ""
   pullPolicy: IfNotPresent
 
+imagePullSecrets: []
+
 resources:
   requests:
     cpu: 500m
@@ -19,12 +24,19 @@ resources:
 nameOverride: ""
 fullnameOverride: ""
 
+# labels that'll be applied to all resources
+commonLabels: {}
+
 cronJobApiVersion: "batch/v1"  # Use "batch/v1beta1" for k8s version < 1.21.0. TODO(@7i) remove with 1.23 release
 schedule: "*/2 * * * *"
+suspend: false
 #startingDeadlineSeconds: 200
 #successfulJobsHistoryLimit: 1
 #failedJobsHistoryLimit: 1
 
+# Required when running as a Deployment
+deschedulingInterval: 5m
+
 cmdOptions:
   v: 3
   # evict-local-storage-pods:
@@ -62,6 +74,23 @@ priorityClassName: system-cluster-critical
 nodeSelector: {}
 #  foo: bar
 
+affinity: {}
+# nodeAffinity:
+#   requiredDuringSchedulingIgnoredDuringExecution:
+#     nodeSelectorTerms:
+#     - matchExpressions:
+#       - key: kubernetes.io/e2e-az-name
+#         operator: In
+#         values:
+#         - e2e-az1
+#         - e2e-az2
+
+tolerations: []
+# - key: 'management'
+#   operator: 'Equal'
+#   value: 'tool'
+#   effect: 'NoSchedule'
+
 rbac:
   # Specifies whether RBAC resources should be created
   create: true
@@ -76,3 +105,15 @@ serviceAccount:
   # The name of the ServiceAccount to use.
   # If not set and create is true, a name is generated using the fullname template
   name:
+  # Specifies custom annotations for the serviceAccount
+  annotations: {}
+
+livenessProbe:
+  failureThreshold: 3
+  httpGet:
+    path: /healthz
+    port: 10258
+    scheme: HTTPS
+  initialDelaySeconds: 3
+  periodSeconds: 10
+

cloudbuild.yaml

@@ -7,7 +7,7 @@ timeout: 1200s
 options:
   substitution_option: ALLOW_LOOSE
 steps:
-  - name: 'gcr.io/k8s-testimages/gcb-docker-gcloud:v20190906-745fed4'
+  - name: 'gcr.io/k8s-staging-test-infra/gcb-docker-gcloud:v20211118-2f2d816b90'
     entrypoint: make
     env:
     - DOCKER_CLI_EXPERIMENTAL=enabled

cmd/descheduler/app/options/options.go

@@ -20,10 +20,8 @@ package options
 import (
 	"github.com/spf13/pflag"
 
-	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	apiserveroptions "k8s.io/apiserver/pkg/server/options"
 	clientset "k8s.io/client-go/kubernetes"
-	"k8s.io/component-base/logs"
 
 	"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
 	"sigs.k8s.io/descheduler/pkg/apis/componentconfig/v1alpha1"
@@ -39,7 +37,6 @@ type DeschedulerServer struct {
 	componentconfig.DeschedulerConfiguration
 
 	Client         clientset.Interface
-	Logs           *logs.Options
 	SecureServing  *apiserveroptions.SecureServingOptionsWithLoopback
 	DisableMetrics bool
 }
@@ -56,18 +53,10 @@ func NewDeschedulerServer() (*DeschedulerServer, error) {
 
 	return &DeschedulerServer{
 		DeschedulerConfiguration: *cfg,
-		Logs:                     logs.NewOptions(),
 		SecureServing:            secureServing,
 	}, nil
 }
 
-// Validation checks for DeschedulerServer.
-func (s *DeschedulerServer) Validate() error {
-	var errs []error
-	errs = append(errs, s.Logs.Validate()...)
-	return utilerrors.NewAggregate(errs)
-}
-
 func newDefaultComponentConfig() (*componentconfig.DeschedulerConfiguration, error) {
 	versionedCfg := v1alpha1.DeschedulerConfiguration{}
 	deschedulerscheme.Scheme.Default(&versionedCfg)
@@ -85,12 +74,6 @@ func (rs *DeschedulerServer) AddFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&rs.KubeconfigFile, "kubeconfig", rs.KubeconfigFile, "File with  kube configuration.")
 	fs.StringVar(&rs.PolicyConfigFile, "policy-config-file", rs.PolicyConfigFile, "File with descheduler policy configuration.")
 	fs.BoolVar(&rs.DryRun, "dry-run", rs.DryRun, "execute descheduler in dry run mode.")
-	// node-selector query causes descheduler to run only on nodes that matches the node labels in the query
-	fs.StringVar(&rs.NodeSelector, "node-selector", rs.NodeSelector, "DEPRECATED: selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
-	// max-no-pods-to-evict limits the maximum number of pods to be evicted per node by descheduler.
-	fs.IntVar(&rs.MaxNoOfPodsToEvictPerNode, "max-pods-to-evict-per-node", rs.MaxNoOfPodsToEvictPerNode, "DEPRECATED: limits the maximum number of pods to be evicted per node by descheduler")
-	// evict-local-storage-pods allows eviction of pods that are using local storage. This is false by default.
-	fs.BoolVar(&rs.EvictLocalStoragePods, "evict-local-storage-pods", rs.EvictLocalStoragePods, "DEPRECATED: enables evicting pods using local storage by descheduler")
 	fs.BoolVar(&rs.DisableMetrics, "disable-metrics", rs.DisableMetrics, "Disables metrics. The metrics are by default served through https://localhost:10258/metrics. Secure address, resp. port can be changed through --bind-address, resp. --secure-port flags.")
 
 	rs.SecureServing.AddFlags(fs)

cmd/descheduler/app/server.go

@@ -19,8 +19,11 @@ package app
 
 import (
 	"context"
-	"flag"
 	"io"
+	"os/signal"
+	"syscall"
+
+	"k8s.io/apiserver/pkg/server/healthz"
 
 	"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
 	"sigs.k8s.io/descheduler/pkg/descheduler"
@@ -30,7 +33,9 @@ import (
 	apiserver "k8s.io/apiserver/pkg/server"
 	"k8s.io/apiserver/pkg/server/mux"
 	restclient "k8s.io/client-go/rest"
-	aflag "k8s.io/component-base/cli/flag"
+	"k8s.io/component-base/config"
+	_ "k8s.io/component-base/logs/json/register"
+	"k8s.io/component-base/logs/registry"
 	"k8s.io/component-base/metrics/legacyregistry"
 	"k8s.io/klog/v2"
 )
@@ -48,8 +53,7 @@ func NewDeschedulerCommand(out io.Writer) *cobra.Command {
 		Short: "descheduler",
 		Long:  `The descheduler evicts pods which may be bound to less desired nodes`,
 		Run: func(cmd *cobra.Command, args []string) {
-			s.Logs.LogFormat = s.Logging.Format
-			s.Logs.Apply()
+			// s.Logs.Config.Format = s.Logging.Format
 
 			// LoopbackClientConfig is a config for a privileged loopback connection
 			var LoopbackClientConfig *restclient.Config
@@ -59,23 +63,30 @@ func NewDeschedulerCommand(out io.Writer) *cobra.Command {
 				return
 			}
 
-			if err := s.Validate(); err != nil {
-				klog.ErrorS(err, "failed to validate server configuration")
+			factory, _ := registry.LogRegistry.Get(s.Logging.Format)
+			if factory == nil {
+				klog.ClearLogger()
+			} else {
+				log, logrFlush := factory.Create(config.FormatOptions{})
+				defer logrFlush()
+				klog.SetLogger(log)
+			}
+
+			ctx, done := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+			defer done()
+			pathRecorderMux := mux.NewPathRecorderMux("descheduler")
+			if !s.DisableMetrics {
+				pathRecorderMux.Handle("/metrics", legacyregistry.HandlerWithReset())
+			}
+
+			healthz.InstallHandler(pathRecorderMux, healthz.NamedCheck("Descheduler", healthz.PingHealthz.Check))
+
+			if _, err := SecureServing.Serve(pathRecorderMux, 0, ctx.Done()); err != nil {
+				klog.Fatalf("failed to start secure server: %v", err)
 				return
 			}
 
-			if !s.DisableMetrics {
-				ctx := context.TODO()
-				pathRecorderMux := mux.NewPathRecorderMux("descheduler")
-				pathRecorderMux.Handle("/metrics", legacyregistry.HandlerWithReset())
-
-				if _, err := SecureServing.Serve(pathRecorderMux, 0, ctx.Done()); err != nil {
-					klog.Fatalf("failed to start secure server: %v", err)
-					return
-				}
-			}
-
-			err := Run(s)
+			err := Run(ctx, s)
 			if err != nil {
 				klog.ErrorS(err, "descheduler server")
 			}
@@ -83,12 +94,10 @@ func NewDeschedulerCommand(out io.Writer) *cobra.Command {
 	}
 	cmd.SetOut(out)
 	flags := cmd.Flags()
-	flags.SetNormalizeFunc(aflag.WordSepNormalizeFunc)
-	flags.AddGoFlagSet(flag.CommandLine)
 	s.AddFlags(flags)
 	return cmd
 }
 
-func Run(rs *options.DeschedulerServer) error {
-	return descheduler.Run(rs)
+func Run(ctx context.Context, rs *options.DeschedulerServer) error {
+	return descheduler.Run(ctx, rs)
 }

cmd/descheduler/descheduler.go

@@ -17,22 +17,23 @@ limitations under the License.
 package main
 
 import (
-	"fmt"
-	"k8s.io/component-base/logs"
 	"os"
+
+	"k8s.io/component-base/cli"
+	"k8s.io/klog/v2"
 	"sigs.k8s.io/descheduler/cmd/descheduler/app"
 )
 
+func init() {
+	klog.SetOutput(os.Stdout)
+	klog.InitFlags(nil)
+}
+
 func main() {
 	out := os.Stdout
 	cmd := app.NewDeschedulerCommand(out)
 	cmd.AddCommand(app.NewVersionCommand())
 
-	logs.InitLogs()
-	defer logs.FlushLogs()
-
-	if err := cmd.Execute(); err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
+	code := cli.Run(cmd)
+	os.Exit(code)
 }

docs/release-guide.md

@@ -9,7 +9,7 @@
 3. Push the release branch to the descheuler repo and ensure branch protection is enabled (not required for patch releases)
 4. Tag the repository from the `master` branch (from the `release-1.18` branch for a patch release) and push the tag `VERSION=v0.18.0 git tag -m $VERSION $VERSION; git push origin $VERSION`
 5. Publish a draft release using the tag you just created
-6. Perform the [image promotion process](https://github.com/kubernetes/k8s.io/tree/master/k8s.gcr.io#image-promoter)
+6. Perform the [image promotion process](https://github.com/kubernetes/k8s.io/tree/main/k8s.gcr.io#image-promoter)
 7. Publish release
 8. Email `kubernetes-sig-scheduling@googlegroups.com` to announce the release
 
@@ -22,7 +22,7 @@
 5. Checkout the tag you just created and make sure your repo is clean by git's standards `git checkout $VERSION`
 6. Build and push the container image to the staging registry `VERSION=$VERSION make push-all`
 7. Publish a draft release using the tag you just created
-8. Perform the [image promotion process](https://github.com/kubernetes/k8s.io/tree/master/k8s.gcr.io#image-promoter)
+8. Perform the [image promotion process](https://github.com/kubernetes/k8s.io/tree/main/k8s.gcr.io#image-promoter)
 9. Publish release
 10. Email `kubernetes-sig-scheduling@googlegroups.com` to announce the release
 

docs/user-guide.md

@@ -4,6 +4,7 @@ Starting with descheduler release v0.10.0 container images are available in the
 
 Descheduler Version | Container Image                                     | Architectures           |
 ------------------- |-----------------------------------------------------|-------------------------|
+v0.22.0             | k8s.gcr.io/descheduler/descheduler:v0.22.0          | AMD64<br>ARM64<br>ARMv7 |
 v0.21.0             | k8s.gcr.io/descheduler/descheduler:v0.21.0          | AMD64<br>ARM64<br>ARMv7 |
 v0.20.0             | k8s.gcr.io/descheduler/descheduler:v0.20.0          | AMD64<br>ARM64          |
 v0.19.0             | k8s.gcr.io/descheduler/descheduler:v0.19.0          | AMD64                   |

examples/failed-pods.yaml

@@ -0,0 +1,14 @@
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "RemoveFailedPods":
+    enabled: true
+    params:
+      failedPods:
+        reasons:
+        - "OutOfcpu"
+        - "CreateContainerConfigError"
+        includingInitContainers: true
+        excludeOwnerKinds:
+        - "Job"
+        minPodLifetimeSeconds: 3600 # 1 hour

examples/high-node-utilization.yml

@@ -1,4 +1,3 @@
----
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:

examples/low-node-utilization.yml

@@ -1,4 +1,3 @@
----
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:

examples/pod-life-time.yml

@@ -1,4 +1,3 @@
----
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:

examples/policy.yaml

@@ -23,3 +23,7 @@ strategies:
        podsHavingTooManyRestarts:
          podRestartThreshold: 100
          includingInitContainers: true
+  "RemovePodsViolatingTopologySpreadConstraint":
+     enabled: true
+     params:
+       includeSoftConstraints: true

examples/topology-spread-constraint.yaml

@@ -0,0 +1,7 @@
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "RemovePodsViolatingTopologySpreadConstraint":
+     enabled: true
+     params:
+       includeSoftConstraints: true # Include 'ScheduleAnyways' constraints

go.mod

@@ -1,19 +1,117 @@
 module sigs.k8s.io/descheduler
 
-go 1.16
+go 1.17
 
 require (
 	github.com/client9/misspell v0.3.4
-	github.com/spf13/cobra v1.1.1
+	github.com/spf13/cobra v1.2.1
 	github.com/spf13/pflag v1.0.5
-	k8s.io/api v0.21.0
-	k8s.io/apimachinery v0.21.0
-	k8s.io/apiserver v0.21.0
-	k8s.io/client-go v0.21.0
-	k8s.io/code-generator v0.21.0
-	k8s.io/component-base v0.21.0
-	k8s.io/component-helpers v0.21.0
-	k8s.io/klog/v2 v2.8.0
+	k8s.io/api v0.23.0
+	k8s.io/apimachinery v0.23.0
+	k8s.io/apiserver v0.23.0
+	k8s.io/client-go v0.23.0
+	k8s.io/code-generator v0.23.0
+	k8s.io/component-base v0.23.0
+	k8s.io/component-helpers v0.23.0
+	k8s.io/klog/v2 v2.30.0
 	k8s.io/kubectl v0.20.5
 	sigs.k8s.io/mdtoc v1.0.1
 )
+
+require (
+	cloud.google.com/go v0.81.0 // indirect
+	github.com/Azure/go-autorest v14.2.0+incompatible // indirect
+	github.com/Azure/go-autorest/autorest v0.11.18 // indirect
+	github.com/Azure/go-autorest/autorest/adal v0.9.13 // indirect
+	github.com/Azure/go-autorest/autorest/date v0.3.0 // indirect
+	github.com/Azure/go-autorest/logger v0.2.1 // indirect
+	github.com/Azure/go-autorest/tracing v0.6.0 // indirect
+	github.com/BurntSushi/toml v0.3.1 // indirect
+	github.com/NYTimes/gziphandler v1.1.1 // indirect
+	github.com/PuerkitoBio/purell v1.1.1 // indirect
+	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/blang/semver v3.5.1+incompatible // indirect
+	github.com/cespare/xxhash/v2 v2.1.1 // indirect
+	github.com/coreos/go-semver v0.3.0 // indirect
+	github.com/coreos/go-systemd/v22 v22.3.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/emicklei/go-restful v2.9.5+incompatible // indirect
+	github.com/evanphx/json-patch v4.12.0+incompatible // indirect
+	github.com/felixge/httpsnoop v1.0.1 // indirect
+	github.com/form3tech-oss/jwt-go v3.2.3+incompatible // indirect
+	github.com/fsnotify/fsnotify v1.4.9 // indirect
+	github.com/go-logr/logr v1.2.0 // indirect
+	github.com/go-logr/zapr v1.2.0 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/jsonreference v0.19.5 // indirect
+	github.com/go-openapi/swag v0.19.14 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/gomarkdown/markdown v0.0.0-20200824053859-8c8b3816f167 // indirect
+	github.com/google/go-cmp v0.5.5 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/google/uuid v1.1.2 // indirect
+	github.com/googleapis/gnostic v0.5.5 // indirect
+	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway v1.16.0 // indirect
+	github.com/imdario/mergo v0.3.5 // indirect
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/mailru/easyjson v0.7.6 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
+	github.com/mmarkdown/mmark v2.0.40+incompatible // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/prometheus/client_golang v1.11.0 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.28.0 // indirect
+	github.com/prometheus/procfs v0.6.0 // indirect
+	go.etcd.io/etcd/api/v3 v3.5.0 // indirect
+	go.etcd.io/etcd/client/pkg/v3 v3.5.0 // indirect
+	go.etcd.io/etcd/client/v3 v3.5.0 // indirect
+	go.opentelemetry.io/contrib v0.20.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.20.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.20.0 // indirect
+	go.opentelemetry.io/otel v0.20.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp v0.20.0 // indirect
+	go.opentelemetry.io/otel/metric v0.20.0 // indirect
+	go.opentelemetry.io/otel/sdk v0.20.0 // indirect
+	go.opentelemetry.io/otel/sdk/export/metric v0.20.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v0.20.0 // indirect
+	go.opentelemetry.io/otel/trace v0.20.0 // indirect
+	go.opentelemetry.io/proto/otlp v0.7.0 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	go.uber.org/zap v1.19.0 // indirect
+	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 // indirect
+	golang.org/x/mod v0.4.2 // indirect
+	golang.org/x/net v0.0.0-20210825183410-e898025ed96a // indirect
+	golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f // indirect
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
+	golang.org/x/sys v0.0.0-20210831042530-f4d43177bf5e // indirect
+	golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b // indirect
+	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac // indirect
+	golang.org/x/tools v0.1.6-0.20210820212750-d4cc65f0b2ff // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20210831024726-fe130286e0e2 // indirect
+	google.golang.org/grpc v1.40.0 // indirect
+	google.golang.org/protobuf v1.27.1 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.0.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	k8s.io/gengo v0.0.0-20210813121822-485abfe95c7c // indirect
+	k8s.io/kube-openapi v0.0.0-20211115234752-e816edb12b65 // indirect
+	k8s.io/utils v0.0.0-20210930125809-cb0fa318a74b // indirect
+	sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.25 // indirect
+	sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.0 // indirect
+	sigs.k8s.io/yaml v1.2.0 // indirect
+)

hack/e2e-gce/gcloud_create_cluster.sh

@@ -18,15 +18,15 @@ E2E_GCE_HOME=$DESCHEDULER_ROOT/hack/e2e-gce
 
 create_cluster() {
 	echo "#################### Creating instances ##########################"
-        gcloud compute instances create descheduler-$master_uuid --image="ubuntu-1604-xenial-v20180306" --image-project="ubuntu-os-cloud" --zone=us-east1-b
+	gcloud compute instances create descheduler-$master_uuid --image-family="ubuntu-1804-lts" --image-project="ubuntu-os-cloud" --zone=us-east1-b
 	# Keeping the --zone here so as to make sure that e2e's can run locally.
 	echo "gcloud compute instances delete descheduler-$master_uuid --zone=us-east1-b --quiet" > $E2E_GCE_HOME/delete_cluster.sh
-       
-	gcloud compute instances create descheduler-$node1_uuid --image="ubuntu-1604-xenial-v20180306" --image-project="ubuntu-os-cloud" --zone=us-east1-b
+
+	gcloud compute instances create descheduler-$node1_uuid --image-family="ubuntu-1804-lts" --image-project="ubuntu-os-cloud" --zone=us-east1-b
 	echo "gcloud compute instances delete descheduler-$node1_uuid --zone=us-east1-b --quiet" >> $E2E_GCE_HOME/delete_cluster.sh
 
-	gcloud compute instances create descheduler-$node2_uuid --image="ubuntu-1604-xenial-v20180306" --image-project="ubuntu-os-cloud" --zone=us-east1-b
-	echo "gcloud compute instances delete descheduler-$node2_uuid --zone=us-east1-b --quiet" >> $E2E_GCE_HOME/delete_cluster.sh
+	gcloud compute instances create descheduler-$node2_uuid --image-family="ubuntu-1804-lts" --image-project="ubuntu-os-cloud" --zone=us-east1-b
+	echo "gcloud compute instances delete descheduler-$node2_uuid --zone=us-east1-c --quiet" >> $E2E_GCE_HOME/delete_cluster.sh
 
 	# Delete the firewall port created for master.
 	echo "gcloud compute firewall-rules delete kubeapiserver-$master_uuid --quiet" >> $E2E_GCE_HOME/delete_cluster.sh
@@ -44,10 +44,10 @@ generate_kubeadm_instance_files() {
 
 
 transfer_install_files() {
-	gcloud compute scp  $E2E_GCE_HOME/kubeadm_preinstall.sh descheduler-$master_uuid:/tmp --zone=us-east1-b
+	gcloud compute scp $E2E_GCE_HOME/kubeadm_preinstall.sh descheduler-$master_uuid:/tmp --zone=us-east1-b
 	gcloud compute scp $E2E_GCE_HOME/kubeadm_install.sh descheduler-$master_uuid:/tmp --zone=us-east1-b
-	gcloud compute scp  $E2E_GCE_HOME/kubeadm_preinstall.sh descheduler-$node1_uuid:/tmp --zone=us-east1-b
-	gcloud compute scp  $E2E_GCE_HOME/kubeadm_preinstall.sh descheduler-$node2_uuid:/tmp --zone=us-east1-b
+	gcloud compute scp $E2E_GCE_HOME/kubeadm_preinstall.sh descheduler-$node1_uuid:/tmp --zone=us-east1-b
+	gcloud compute scp $E2E_GCE_HOME/kubeadm_preinstall.sh descheduler-$node2_uuid:/tmp --zone=us-east1-c
 }
 
 
@@ -55,19 +55,19 @@ install_kube() {
 	# Docker installation.
 	gcloud compute ssh descheduler-$master_uuid --command "sudo apt-get update; sudo apt-get install -y docker.io" --zone=us-east1-b
 	gcloud compute ssh descheduler-$node1_uuid --command "sudo apt-get update; sudo apt-get install -y docker.io" --zone=us-east1-b
-	gcloud compute ssh descheduler-$node2_uuid --command "sudo apt-get update; sudo apt-get install -y docker.io" --zone=us-east1-b
+	gcloud compute ssh descheduler-$node2_uuid --command "sudo apt-get update; sudo apt-get install -y docker.io" --zone=us-east1-c
 	# kubeadm installation.
 	# 1. Transfer files to master, nodes.
 	transfer_install_files
 	# 2. Install kubeadm.
 	#TODO: Add rm /tmp/kubeadm_install.sh
 	# Open port for kube API server	
-	gcloud compute firewall-rules create kubeapiserver-$master_uuid --allow tcp:6443 --source-tags=descheduler-$master_uuid  --source-ranges=0.0.0.0/0 --description="Opening api server port" 
+	gcloud compute firewall-rules create kubeapiserver-$master_uuid --allow tcp:6443 --source-tags=descheduler-$master_uuid  --source-ranges=0.0.0.0/0 --description="Opening api server port"
 
 	gcloud compute ssh descheduler-$master_uuid --command "sudo chmod 755 /tmp/kubeadm_preinstall.sh; sudo /tmp/kubeadm_preinstall.sh" --zone=us-east1-b
 	kubeadm_join_command=$(gcloud compute ssh descheduler-$master_uuid --command "sudo chmod 755 /tmp/kubeadm_install.sh; sudo /tmp/kubeadm_install.sh" --zone=us-east1-b|grep 'kubeadm join')
 	
-	# Copy the kubeconfig file onto /tmp for e2e tests. 
+	# Copy the kubeconfig file onto /tmp for e2e tests.
 	gcloud compute ssh descheduler-$master_uuid --command "sudo cp /etc/kubernetes/admin.conf /tmp; sudo chmod 777 /tmp/admin.conf" --zone=us-east1-b
 	gcloud compute scp descheduler-$master_uuid:/tmp/admin.conf /tmp/admin.conf --zone=us-east1-b
 
@@ -75,16 +75,15 @@ install_kube() {
 	gcloud compute ssh descheduler-$master_uuid --command "sudo kubectl apply -f https://raw.githubusercontent.com/cloudnativelabs/kube-router/master/daemonset/kubeadm-kuberouter.yaml --kubeconfig /etc/kubernetes/admin.conf" --zone=us-east1-b
 	echo $kubeadm_join_command > $E2E_GCE_HOME/kubeadm_join.sh
 
-	# Copy kubeadm_join to every node. 
+	# Copy kubeadm_join to every node.
 	#TODO: Put these in a loop, so that extension becomes possible.	
 	gcloud compute ssh descheduler-$node1_uuid --command "sudo chmod 755 /tmp/kubeadm_preinstall.sh; sudo /tmp/kubeadm_preinstall.sh" --zone=us-east1-b
 	gcloud compute scp $E2E_GCE_HOME/kubeadm_join.sh descheduler-$node1_uuid:/tmp --zone=us-east1-b
 	gcloud compute ssh descheduler-$node1_uuid --command "sudo chmod 755 /tmp/kubeadm_join.sh; sudo /tmp/kubeadm_join.sh" --zone=us-east1-b
 	
-	gcloud compute ssh descheduler-$node2_uuid --command "sudo chmod 755 /tmp/kubeadm_preinstall.sh; sudo /tmp/kubeadm_preinstall.sh" --zone=us-east1-b
-	gcloud compute scp $E2E_GCE_HOME/kubeadm_join.sh descheduler-$node2_uuid:/tmp --zone=us-east1-b
-	gcloud compute ssh descheduler-$node2_uuid --command "sudo chmod 755 /tmp/kubeadm_join.sh; sudo /tmp/kubeadm_join.sh" --zone=us-east1-b
-
+	gcloud compute ssh descheduler-$node2_uuid --command "sudo chmod 755 /tmp/kubeadm_preinstall.sh; sudo /tmp/kubeadm_preinstall.sh" --zone=us-east1-c
+	gcloud compute scp $E2E_GCE_HOME/kubeadm_join.sh descheduler-$node2_uuid:/tmp --zone=us-east1-c
+	gcloud compute ssh descheduler-$node2_uuid --command "sudo chmod 755 /tmp/kubeadm_join.sh; sudo /tmp/kubeadm_join.sh" --zone=us-east1-c
 }
 
 

hack/kind_config.yaml

@@ -3,4 +3,16 @@ apiVersion: kind.x-k8s.io/v1alpha4
 nodes:
 - role: control-plane
 - role: worker
+  kubeadmConfigPatches:
+    - |
+      kind: JoinConfiguration
+      nodeRegistration:
+        kubeletExtraArgs:
+          node-labels: "topology.kubernetes.io/zone=local-a"
 - role: worker
+  kubeadmConfigPatches:
+    - |
+      kind: JoinConfiguration
+      nodeRegistration:
+        kubeletExtraArgs:
+          node-labels: "topology.kubernetes.io/zone=local-b"

hack/tools.go

@@ -1,3 +1,4 @@
+//go:build tools
 // +build tools
 
 /*

hack/update-gofmt.sh

@@ -23,7 +23,7 @@ DESCHEDULER_ROOT=$(dirname "${BASH_SOURCE}")/..
 
 GO_VERSION=($(go version))
 
-if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.14|go1.15|go1.16') ]]; then
+if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.14|go1.15|go1.16|go1.17') ]]; then
   echo "Unknown go version '${GO_VERSION[2]}', skipping gofmt."
   exit 1
 fi

hack/verify-conversions.sh

@@ -28,7 +28,7 @@ pushd "${DESCHEDULER_ROOT}" > /dev/null 2>&1
 if ! _out="$(diff -Naupr pkg/ "${_deschedulertmp}/pkg/")"; then
     echo "Generated output differs:" >&2
     echo "${_out}" >&2
-    echo "Generated conversions verify failed. Please run ./hack/update-generated-conversions.sh (and commit the result)"
+    echo "Generated conversions verify failed. Please run ./hack/update-generated-conversions.sh"
     exit 1
 fi
 popd > /dev/null 2>&1

hack/verify-deep-copies.sh

@@ -28,7 +28,7 @@ pushd "${DESCHEDULER_ROOT}" > /dev/null 2>&1
 if ! _out="$(diff -Naupr pkg/ "${_deschedulertmp}/pkg/")"; then
     echo "Generated deep-copies output differs:" >&2
     echo "${_out}" >&2
-    echo "Generated deep-copies verify failed. Please run ./hack/update-generated-deep-copies.sh (and commit the result)"
+    echo "Generated deep-copies verify failed. Please run ./hack/update-generated-deep-copies.sh"
     exit 1
 fi
 popd > /dev/null 2>&1

hack/verify-defaulters.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+source "$(dirname "${BASH_SOURCE}")/lib/init.sh"
+DESCHEDULER_ROOT=$(dirname "${BASH_SOURCE}")/..
+_tmpdir="$(mktemp -d "${DESCHEDULER_ROOT}/_tmp/kube-verify.XXXXXX")"
+
+_deschedulertmp="${_tmpdir}"
+mkdir -p "${_deschedulertmp}"
+
+git archive --format=tar --prefix=descheduler/ "$(git write-tree)" | (cd "${_deschedulertmp}" && tar xf -)
+_deschedulertmp="${_deschedulertmp}/descheduler"
+
+pushd "${_deschedulertmp}" > /dev/null 2>&1
+go build -o "${OS_OUTPUT_BINPATH}/defaulter-gen" "k8s.io/code-generator/cmd/defaulter-gen"
+
+${OS_OUTPUT_BINPATH}/defaulter-gen \
+            --go-header-file "hack/boilerplate/boilerplate.go.txt" \
+            --input-dirs "${PRJ_PREFIX}/pkg/apis/componentconfig/v1alpha1,${PRJ_PREFIX}/pkg/api/v1alpha1" \
+            --extra-peer-dirs "${PRJ_PREFIX}/pkg/apis/componentconfig/v1alpha1,${PRJ_PREFIX}/pkg/api/v1alpha1" \
+            --output-file-base zz_generated.defaults
+popd > /dev/null 2>&1
+
+pushd "${DESCHEDULER_ROOT}" > /dev/null 2>&1
+if ! _out="$(diff -Naupr pkg/ "${_deschedulertmp}/pkg/")"; then
+    echo "Generated defaulters output differs:" >&2
+    echo "${_out}" >&2
+    echo "Generated defaulters verify failed. Please run ./hack/update-generated-defaulters.sh"
+fi
+popd > /dev/null 2>&1
+
+echo "Generated Defaulters verified."

hack/verify-gofmt.sh

@@ -23,7 +23,7 @@ DESCHEDULER_ROOT=$(dirname "${BASH_SOURCE}")/..
 
 GO_VERSION=($(go version))
 
-if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.14|go1.15|go1.16') ]]; then
+if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.14|go1.15|go1.16|go1.17') ]]; then
   echo "Unknown go version '${GO_VERSION[2]}', skipping gofmt."
   exit 1
 fi

kubernetes/cronjob/cronjob.yaml

@@ -16,7 +16,7 @@ spec:
           priorityClassName: system-cluster-critical
           containers:
           - name: descheduler
-            image: k8s.gcr.io/descheduler/descheduler:v0.21.0
+            image: k8s.gcr.io/descheduler/descheduler:v0.22.0
             volumeMounts:
             - mountPath: /policy-dir
               name: policy-volume
@@ -31,6 +31,14 @@ spec:
               requests:
                 cpu: "500m"
                 memory: "256Mi"
+            livenessProbe:
+              failureThreshold: 3
+              httpGet:
+                path: /healthz
+                port: 10258
+                scheme: HTTPS
+              initialDelaySeconds: 3
+              periodSeconds: 10
             securityContext:
               allowPrivilegeEscalation: false
               capabilities:

kubernetes/deployment/deployment.yaml

@@ -19,7 +19,7 @@ spec:
       serviceAccountName: descheduler-sa
       containers:
         - name: descheduler
-          image: k8s.gcr.io/descheduler/descheduler:v0.21.0
+          image: k8s.gcr.io/descheduler/descheduler:v0.22.0
           imagePullPolicy: IfNotPresent
           command:
             - "/bin/descheduler"
@@ -33,6 +33,14 @@ spec:
           ports:
           - containerPort: 10258
             protocol: TCP
+          livenessProbe:
+            failureThreshold: 3
+            httpGet:
+              path: /healthz
+              port: 10258
+              scheme: HTTPS
+            initialDelaySeconds: 3
+            periodSeconds: 10
           resources:
             requests:
               cpu: 500m

kubernetes/job/job.yaml

@@ -14,7 +14,7 @@ spec:
       priorityClassName: system-cluster-critical
       containers:
         - name: descheduler
-          image: k8s.gcr.io/descheduler/descheduler:v0.21.0
+          image: k8s.gcr.io/descheduler/descheduler:v0.22.0
           volumeMounts:
           - mountPath: /policy-dir
             name: policy-volume
@@ -29,6 +29,14 @@ spec:
             requests:
               cpu: "500m"
               memory: "256Mi"
+          livenessProbe:
+            failureThreshold: 3
+            httpGet:
+              path: /healthz
+              port: 10258
+              scheme: HTTPS
+            initialDelaySeconds: 3
+            periodSeconds: 10
           securityContext:
             allowPrivilegeEscalation: false
             capabilities:

metrics/metrics.go

@@ -34,9 +34,9 @@ var (
 		&metrics.CounterOpts{
 			Subsystem:      DeschedulerSubsystem,
 			Name:           "pods_evicted",
-			Help:           "Number of evicted pods, by the result, by the strategy, by the namespace. 'failed' result means a pod could not be evicted",
+			Help:           "Number of evicted pods, by the result, by the strategy, by the namespace, by the node name. 'error' result means a pod could not be evicted",
 			StabilityLevel: metrics.ALPHA,
-		}, []string{"result", "strategy", "namespace"})
+		}, []string{"result", "strategy", "namespace", "node"})
 
 	buildInfo = metrics.NewGauge(
 		&metrics.GaugeOpts{

pkg/api/types.go

@@ -32,6 +32,9 @@ type DeschedulerPolicy struct {
 	// NodeSelector for a set of nodes to operate over
 	NodeSelector *string
 
+	// EvictFailedBarePods allows pods without ownerReferences and in failed phase to be evicted.
+	EvictFailedBarePods *bool
+
 	// EvictLocalStoragePods allows pods using local storage to be evicted.
 	EvictLocalStoragePods *bool
 
@@ -42,7 +45,10 @@ type DeschedulerPolicy struct {
 	IgnorePVCPods *bool
 
 	// MaxNoOfPodsToEvictPerNode restricts maximum of pods to be evicted per node.
-	MaxNoOfPodsToEvictPerNode *int
+	MaxNoOfPodsToEvictPerNode *uint
+
+	// MaxNoOfPodsToEvictPerNamespace restricts maximum of pods to be evicted per namespace.
+	MaxNoOfPodsToEvictPerNamespace *uint
 }
 
 type StrategyName string
@@ -75,6 +81,7 @@ type StrategyParameters struct {
 	PodsHavingTooManyRestarts         *PodsHavingTooManyRestarts
 	PodLifeTime                       *PodLifeTime
 	RemoveDuplicates                  *RemoveDuplicates
+	FailedPods                        *FailedPods
 	IncludeSoftConstraints            bool
 	Namespaces                        *Namespaces
 	ThresholdPriority                 *int32
@@ -105,3 +112,10 @@ type PodLifeTime struct {
 	MaxPodLifeTimeSeconds *uint
 	PodStatusPhases       []string
 }
+
+type FailedPods struct {
+	ExcludeOwnerKinds       []string
+	MinPodLifetimeSeconds   *uint
+	Reasons                 []string
+	IncludingInitContainers bool
+}

pkg/api/v1alpha1/types.go

@@ -32,6 +32,9 @@ type DeschedulerPolicy struct {
 	// NodeSelector for a set of nodes to operate over
 	NodeSelector *string `json:"nodeSelector,omitempty"`
 
+	// EvictFailedBarePods allows pods without ownerReferences and in failed phase to be evicted.
+	EvictFailedBarePods *bool `json:"evictFailedBarePods,omitempty"`
+
 	// EvictLocalStoragePods allows pods using local storage to be evicted.
 	EvictLocalStoragePods *bool `json:"evictLocalStoragePods,omitempty"`
 
@@ -43,6 +46,9 @@ type DeschedulerPolicy struct {
 
 	// MaxNoOfPodsToEvictPerNode restricts maximum of pods to be evicted per node.
 	MaxNoOfPodsToEvictPerNode *int `json:"maxNoOfPodsToEvictPerNode,omitempty"`
+
+	// MaxNoOfPodsToEvictPerNamespace restricts maximum of pods to be evicted per namespace.
+	MaxNoOfPodsToEvictPerNamespace *int `json:"maxNoOfPodsToEvictPerNamespace,omitempty"`
 }
 
 type StrategyName string
@@ -73,6 +79,7 @@ type StrategyParameters struct {
 	PodsHavingTooManyRestarts         *PodsHavingTooManyRestarts         `json:"podsHavingTooManyRestarts,omitempty"`
 	PodLifeTime                       *PodLifeTime                       `json:"podLifeTime,omitempty"`
 	RemoveDuplicates                  *RemoveDuplicates                  `json:"removeDuplicates,omitempty"`
+	FailedPods                        *FailedPods                        `json:"failedPods,omitempty"`
 	IncludeSoftConstraints            bool                               `json:"includeSoftConstraints"`
 	Namespaces                        *Namespaces                        `json:"namespaces"`
 	ThresholdPriority                 *int32                             `json:"thresholdPriority"`
@@ -103,3 +110,10 @@ type PodLifeTime struct {
 	MaxPodLifeTimeSeconds *uint    `json:"maxPodLifeTimeSeconds,omitempty"`
 	PodStatusPhases       []string `json:"podStatusPhases,omitempty"`
 }
+
+type FailedPods struct {
+	ExcludeOwnerKinds       []string `json:"excludeOwnerKinds,omitempty"`
+	MinPodLifetimeSeconds   *uint    `json:"minPodLifetimeSeconds,omitempty"`
+	Reasons                 []string `json:"reasons,omitempty"`
+	IncludingInitContainers bool     `json:"includingInitContainers,omitempty"`
+}

pkg/api/v1alpha1/zz_generated.conversion.go

@@ -1,7 +1,8 @@
+//go:build !ignore_autogenerated
 // +build !ignore_autogenerated
 
 /*
-Copyright 2021 The Kubernetes Authors.
+Copyright 2022 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -56,6 +57,16 @@ func RegisterConversions(s *runtime.Scheme) error {
 	}); err != nil {
 		return err
 	}
+	if err := s.AddGeneratedConversionFunc((*FailedPods)(nil), (*api.FailedPods)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_v1alpha1_FailedPods_To_api_FailedPods(a.(*FailedPods), b.(*api.FailedPods), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.FailedPods)(nil), (*FailedPods)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_FailedPods_To_v1alpha1_FailedPods(a.(*api.FailedPods), b.(*FailedPods), scope)
+	}); err != nil {
+		return err
+	}
 	if err := s.AddGeneratedConversionFunc((*Namespaces)(nil), (*api.Namespaces)(nil), func(a, b interface{}, scope conversion.Scope) error {
 		return Convert_v1alpha1_Namespaces_To_api_Namespaces(a.(*Namespaces), b.(*api.Namespaces), scope)
 	}); err != nil {
@@ -122,10 +133,24 @@ func RegisterConversions(s *runtime.Scheme) error {
 func autoConvert_v1alpha1_DeschedulerPolicy_To_api_DeschedulerPolicy(in *DeschedulerPolicy, out *api.DeschedulerPolicy, s conversion.Scope) error {
 	out.Strategies = *(*api.StrategyList)(unsafe.Pointer(&in.Strategies))
 	out.NodeSelector = (*string)(unsafe.Pointer(in.NodeSelector))
+	out.EvictFailedBarePods = (*bool)(unsafe.Pointer(in.EvictFailedBarePods))
 	out.EvictLocalStoragePods = (*bool)(unsafe.Pointer(in.EvictLocalStoragePods))
 	out.EvictSystemCriticalPods = (*bool)(unsafe.Pointer(in.EvictSystemCriticalPods))
 	out.IgnorePVCPods = (*bool)(unsafe.Pointer(in.IgnorePVCPods))
-	out.MaxNoOfPodsToEvictPerNode = (*int)(unsafe.Pointer(in.MaxNoOfPodsToEvictPerNode))
+	if in.MaxNoOfPodsToEvictPerNode != nil {
+		in, out := &in.MaxNoOfPodsToEvictPerNode, &out.MaxNoOfPodsToEvictPerNode
+		*out = new(uint)
+		**out = uint(**in)
+	} else {
+		out.MaxNoOfPodsToEvictPerNode = nil
+	}
+	if in.MaxNoOfPodsToEvictPerNamespace != nil {
+		in, out := &in.MaxNoOfPodsToEvictPerNamespace, &out.MaxNoOfPodsToEvictPerNamespace
+		*out = new(uint)
+		**out = uint(**in)
+	} else {
+		out.MaxNoOfPodsToEvictPerNamespace = nil
+	}
 	return nil
 }
 
@@ -137,10 +162,24 @@ func Convert_v1alpha1_DeschedulerPolicy_To_api_DeschedulerPolicy(in *Descheduler
 func autoConvert_api_DeschedulerPolicy_To_v1alpha1_DeschedulerPolicy(in *api.DeschedulerPolicy, out *DeschedulerPolicy, s conversion.Scope) error {
 	out.Strategies = *(*StrategyList)(unsafe.Pointer(&in.Strategies))
 	out.NodeSelector = (*string)(unsafe.Pointer(in.NodeSelector))
+	out.EvictFailedBarePods = (*bool)(unsafe.Pointer(in.EvictFailedBarePods))
 	out.EvictLocalStoragePods = (*bool)(unsafe.Pointer(in.EvictLocalStoragePods))
 	out.EvictSystemCriticalPods = (*bool)(unsafe.Pointer(in.EvictSystemCriticalPods))
 	out.IgnorePVCPods = (*bool)(unsafe.Pointer(in.IgnorePVCPods))
-	out.MaxNoOfPodsToEvictPerNode = (*int)(unsafe.Pointer(in.MaxNoOfPodsToEvictPerNode))
+	if in.MaxNoOfPodsToEvictPerNode != nil {
+		in, out := &in.MaxNoOfPodsToEvictPerNode, &out.MaxNoOfPodsToEvictPerNode
+		*out = new(int)
+		**out = int(**in)
+	} else {
+		out.MaxNoOfPodsToEvictPerNode = nil
+	}
+	if in.MaxNoOfPodsToEvictPerNamespace != nil {
+		in, out := &in.MaxNoOfPodsToEvictPerNamespace, &out.MaxNoOfPodsToEvictPerNamespace
+		*out = new(int)
+		**out = int(**in)
+	} else {
+		out.MaxNoOfPodsToEvictPerNamespace = nil
+	}
 	return nil
 }
 
@@ -173,6 +212,32 @@ func Convert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy(in *api.Des
 	return autoConvert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy(in, out, s)
 }
 
+func autoConvert_v1alpha1_FailedPods_To_api_FailedPods(in *FailedPods, out *api.FailedPods, s conversion.Scope) error {
+	out.ExcludeOwnerKinds = *(*[]string)(unsafe.Pointer(&in.ExcludeOwnerKinds))
+	out.MinPodLifetimeSeconds = (*uint)(unsafe.Pointer(in.MinPodLifetimeSeconds))
+	out.Reasons = *(*[]string)(unsafe.Pointer(&in.Reasons))
+	out.IncludingInitContainers = in.IncludingInitContainers
+	return nil
+}
+
+// Convert_v1alpha1_FailedPods_To_api_FailedPods is an autogenerated conversion function.
+func Convert_v1alpha1_FailedPods_To_api_FailedPods(in *FailedPods, out *api.FailedPods, s conversion.Scope) error {
+	return autoConvert_v1alpha1_FailedPods_To_api_FailedPods(in, out, s)
+}
+
+func autoConvert_api_FailedPods_To_v1alpha1_FailedPods(in *api.FailedPods, out *FailedPods, s conversion.Scope) error {
+	out.ExcludeOwnerKinds = *(*[]string)(unsafe.Pointer(&in.ExcludeOwnerKinds))
+	out.MinPodLifetimeSeconds = (*uint)(unsafe.Pointer(in.MinPodLifetimeSeconds))
+	out.Reasons = *(*[]string)(unsafe.Pointer(&in.Reasons))
+	out.IncludingInitContainers = in.IncludingInitContainers
+	return nil
+}
+
+// Convert_api_FailedPods_To_v1alpha1_FailedPods is an autogenerated conversion function.
+func Convert_api_FailedPods_To_v1alpha1_FailedPods(in *api.FailedPods, out *FailedPods, s conversion.Scope) error {
+	return autoConvert_api_FailedPods_To_v1alpha1_FailedPods(in, out, s)
+}
+
 func autoConvert_v1alpha1_Namespaces_To_api_Namespaces(in *Namespaces, out *api.Namespaces, s conversion.Scope) error {
 	out.Include = *(*[]string)(unsafe.Pointer(&in.Include))
 	out.Exclude = *(*[]string)(unsafe.Pointer(&in.Exclude))
@@ -289,6 +354,7 @@ func autoConvert_v1alpha1_StrategyParameters_To_api_StrategyParameters(in *Strat
 	out.PodsHavingTooManyRestarts = (*api.PodsHavingTooManyRestarts)(unsafe.Pointer(in.PodsHavingTooManyRestarts))
 	out.PodLifeTime = (*api.PodLifeTime)(unsafe.Pointer(in.PodLifeTime))
 	out.RemoveDuplicates = (*api.RemoveDuplicates)(unsafe.Pointer(in.RemoveDuplicates))
+	out.FailedPods = (*api.FailedPods)(unsafe.Pointer(in.FailedPods))
 	out.IncludeSoftConstraints = in.IncludeSoftConstraints
 	out.Namespaces = (*api.Namespaces)(unsafe.Pointer(in.Namespaces))
 	out.ThresholdPriority = (*int32)(unsafe.Pointer(in.ThresholdPriority))
@@ -309,6 +375,7 @@ func autoConvert_api_StrategyParameters_To_v1alpha1_StrategyParameters(in *api.S
 	out.PodsHavingTooManyRestarts = (*PodsHavingTooManyRestarts)(unsafe.Pointer(in.PodsHavingTooManyRestarts))
 	out.PodLifeTime = (*PodLifeTime)(unsafe.Pointer(in.PodLifeTime))
 	out.RemoveDuplicates = (*RemoveDuplicates)(unsafe.Pointer(in.RemoveDuplicates))
+	out.FailedPods = (*FailedPods)(unsafe.Pointer(in.FailedPods))
 	out.IncludeSoftConstraints = in.IncludeSoftConstraints
 	out.Namespaces = (*Namespaces)(unsafe.Pointer(in.Namespaces))
 	out.ThresholdPriority = (*int32)(unsafe.Pointer(in.ThresholdPriority))

pkg/api/v1alpha1/zz_generated.deepcopy.go

@@ -1,7 +1,8 @@
+//go:build !ignore_autogenerated
 // +build !ignore_autogenerated
 
 /*
-Copyright 2021 The Kubernetes Authors.
+Copyright 2022 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -41,6 +42,11 @@ func (in *DeschedulerPolicy) DeepCopyInto(out *DeschedulerPolicy) {
 		*out = new(string)
 		**out = **in
 	}
+	if in.EvictFailedBarePods != nil {
+		in, out := &in.EvictFailedBarePods, &out.EvictFailedBarePods
+		*out = new(bool)
+		**out = **in
+	}
 	if in.EvictLocalStoragePods != nil {
 		in, out := &in.EvictLocalStoragePods, &out.EvictLocalStoragePods
 		*out = new(bool)
@@ -61,6 +67,11 @@ func (in *DeschedulerPolicy) DeepCopyInto(out *DeschedulerPolicy) {
 		*out = new(int)
 		**out = **in
 	}
+	if in.MaxNoOfPodsToEvictPerNamespace != nil {
+		in, out := &in.MaxNoOfPodsToEvictPerNamespace, &out.MaxNoOfPodsToEvictPerNamespace
+		*out = new(int)
+		**out = **in
+	}
 	return
 }
 
@@ -103,6 +114,37 @@ func (in *DeschedulerStrategy) DeepCopy() *DeschedulerStrategy {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *FailedPods) DeepCopyInto(out *FailedPods) {
+	*out = *in
+	if in.ExcludeOwnerKinds != nil {
+		in, out := &in.ExcludeOwnerKinds, &out.ExcludeOwnerKinds
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	if in.MinPodLifetimeSeconds != nil {
+		in, out := &in.MinPodLifetimeSeconds, &out.MinPodLifetimeSeconds
+		*out = new(uint)
+		**out = **in
+	}
+	if in.Reasons != nil {
+		in, out := &in.Reasons, &out.Reasons
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new FailedPods.
+func (in *FailedPods) DeepCopy() *FailedPods {
+	if in == nil {
+		return nil
+	}
+	out := new(FailedPods)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *Namespaces) DeepCopyInto(out *Namespaces) {
 	*out = *in
@@ -294,6 +336,11 @@ func (in *StrategyParameters) DeepCopyInto(out *StrategyParameters) {
 		*out = new(RemoveDuplicates)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.FailedPods != nil {
+		in, out := &in.FailedPods, &out.FailedPods
+		*out = new(FailedPods)
+		(*in).DeepCopyInto(*out)
+	}
 	if in.Namespaces != nil {
 		in, out := &in.Namespaces, &out.Namespaces
 		*out = new(Namespaces)

pkg/api/v1alpha1/zz_generated.defaults.go

@@ -1,7 +1,8 @@
+//go:build !ignore_autogenerated
 // +build !ignore_autogenerated
 
 /*
-Copyright 2021 The Kubernetes Authors.
+Copyright 2022 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

pkg/api/zz_generated.deepcopy.go

@@ -1,7 +1,8 @@
+//go:build !ignore_autogenerated
 // +build !ignore_autogenerated
 
 /*
-Copyright 2021 The Kubernetes Authors.
+Copyright 2022 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -41,6 +42,11 @@ func (in *DeschedulerPolicy) DeepCopyInto(out *DeschedulerPolicy) {
 		*out = new(string)
 		**out = **in
 	}
+	if in.EvictFailedBarePods != nil {
+		in, out := &in.EvictFailedBarePods, &out.EvictFailedBarePods
+		*out = new(bool)
+		**out = **in
+	}
 	if in.EvictLocalStoragePods != nil {
 		in, out := &in.EvictLocalStoragePods, &out.EvictLocalStoragePods
 		*out = new(bool)
@@ -58,7 +64,12 @@ func (in *DeschedulerPolicy) DeepCopyInto(out *DeschedulerPolicy) {
 	}
 	if in.MaxNoOfPodsToEvictPerNode != nil {
 		in, out := &in.MaxNoOfPodsToEvictPerNode, &out.MaxNoOfPodsToEvictPerNode
-		*out = new(int)
+		*out = new(uint)
+		**out = **in
+	}
+	if in.MaxNoOfPodsToEvictPerNamespace != nil {
+		in, out := &in.MaxNoOfPodsToEvictPerNamespace, &out.MaxNoOfPodsToEvictPerNamespace
+		*out = new(uint)
 		**out = **in
 	}
 	return
@@ -103,6 +114,37 @@ func (in *DeschedulerStrategy) DeepCopy() *DeschedulerStrategy {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *FailedPods) DeepCopyInto(out *FailedPods) {
+	*out = *in
+	if in.ExcludeOwnerKinds != nil {
+		in, out := &in.ExcludeOwnerKinds, &out.ExcludeOwnerKinds
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	if in.MinPodLifetimeSeconds != nil {
+		in, out := &in.MinPodLifetimeSeconds, &out.MinPodLifetimeSeconds
+		*out = new(uint)
+		**out = **in
+	}
+	if in.Reasons != nil {
+		in, out := &in.Reasons, &out.Reasons
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new FailedPods.
+func (in *FailedPods) DeepCopy() *FailedPods {
+	if in == nil {
+		return nil
+	}
+	out := new(FailedPods)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *Namespaces) DeepCopyInto(out *Namespaces) {
 	*out = *in
@@ -294,6 +336,11 @@ func (in *StrategyParameters) DeepCopyInto(out *StrategyParameters) {
 		*out = new(RemoveDuplicates)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.FailedPods != nil {
+		in, out := &in.FailedPods, &out.FailedPods
+		*out = new(FailedPods)
+		(*in).DeepCopyInto(*out)
+	}
 	if in.Namespaces != nil {
 		in, out := &in.Namespaces, &out.Namespaces
 		*out = new(Namespaces)

pkg/apis/componentconfig/v1alpha1/types.go

@@ -17,9 +17,10 @@ limitations under the License.
 package v1alpha1
 
 import (
-	componentbaseconfig "k8s.io/component-base/config"
 	"time"
 
+	componentbaseconfig "k8s.io/component-base/config"
+
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 

pkg/apis/componentconfig/v1alpha1/zz_generated.conversion.go

@@ -1,7 +1,8 @@
+//go:build !ignore_autogenerated
 // +build !ignore_autogenerated
 
 /*
-Copyright 2021 The Kubernetes Authors.
+Copyright 2022 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

pkg/apis/componentconfig/v1alpha1/zz_generated.deepcopy.go

@@ -1,7 +1,8 @@
+//go:build !ignore_autogenerated
 // +build !ignore_autogenerated
 
 /*
-Copyright 2021 The Kubernetes Authors.
+Copyright 2022 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -28,7 +29,7 @@ import (
 func (in *DeschedulerConfiguration) DeepCopyInto(out *DeschedulerConfiguration) {
 	*out = *in
 	out.TypeMeta = in.TypeMeta
-	out.Logging = in.Logging
+	in.Logging.DeepCopyInto(&out.Logging)
 	return
 }
 

pkg/apis/componentconfig/v1alpha1/zz_generated.defaults.go

@@ -1,7 +1,8 @@
+//go:build !ignore_autogenerated
 // +build !ignore_autogenerated
 
 /*
-Copyright 2021 The Kubernetes Authors.
+Copyright 2022 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

pkg/apis/componentconfig/zz_generated.deepcopy.go

@@ -1,7 +1,8 @@
+//go:build !ignore_autogenerated
 // +build !ignore_autogenerated
 
 /*
-Copyright 2021 The Kubernetes Authors.
+Copyright 2022 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -28,7 +29,7 @@ import (
 func (in *DeschedulerConfiguration) DeepCopyInto(out *DeschedulerConfiguration) {
 	*out = *in
 	out.TypeMeta = in.TypeMeta
-	out.Logging = in.Logging
+	in.Logging.DeepCopyInto(&out.Logging)
 	return
 }
 

pkg/descheduler/descheduler.go

@@ -19,14 +19,22 @@ package descheduler
 import (
 	"context"
 	"fmt"
-	"sigs.k8s.io/descheduler/pkg/descheduler/strategies/nodeutilization"
 
 	v1 "k8s.io/api/core/v1"
-	clientset "k8s.io/client-go/kubernetes"
-	"k8s.io/klog/v2"
-
+	policy "k8s.io/api/policy/v1beta1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/client-go/informers"
+	clientset "k8s.io/client-go/kubernetes"
+	fakeclientset "k8s.io/client-go/kubernetes/fake"
+	core "k8s.io/client-go/testing"
+	"k8s.io/klog/v2"
+
+	corev1informers "k8s.io/client-go/informers/core/v1"
+	schedulingv1informers "k8s.io/client-go/informers/scheduling/v1"
+
 	"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
 	"sigs.k8s.io/descheduler/metrics"
 	"sigs.k8s.io/descheduler/pkg/api"
@@ -34,13 +42,14 @@ import (
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
 	nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
+	"sigs.k8s.io/descheduler/pkg/descheduler/strategies/nodeutilization"
 )
 
-func Run(rs *options.DeschedulerServer) error {
+func Run(ctx context.Context, rs *options.DeschedulerServer) error {
 	metrics.Register()
 
-	ctx := context.Background()
 	rsclient, err := client.CreateClient(rs.KubeconfigFile)
 	if err != nil {
 		return err
@@ -60,15 +69,108 @@ func Run(rs *options.DeschedulerServer) error {
 		return err
 	}
 
+	// tie in root ctx with our wait stopChannel
 	stopChannel := make(chan struct{})
+	go func() {
+		<-ctx.Done()
+		close(stopChannel)
+	}()
 	return RunDeschedulerStrategies(ctx, rs, deschedulerPolicy, evictionPolicyGroupVersion, stopChannel)
 }
 
-type strategyFunction func(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor)
+type strategyFunction func(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc)
+
+func cachedClient(
+	realClient clientset.Interface,
+	podInformer corev1informers.PodInformer,
+	nodeInformer corev1informers.NodeInformer,
+	namespaceInformer corev1informers.NamespaceInformer,
+	priorityClassInformer schedulingv1informers.PriorityClassInformer,
+) (clientset.Interface, error) {
+	fakeClient := fakeclientset.NewSimpleClientset()
+	// simulate a pod eviction by deleting a pod
+	fakeClient.PrependReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
+		if action.GetSubresource() == "eviction" {
+			createAct, matched := action.(core.CreateActionImpl)
+			if !matched {
+				return false, nil, fmt.Errorf("unable to convert action to core.CreateActionImpl")
+			}
+			eviction, matched := createAct.Object.(*policy.Eviction)
+			if !matched {
+				return false, nil, fmt.Errorf("unable to convert action object into *policy.Eviction")
+			}
+			if err := fakeClient.Tracker().Delete(action.GetResource(), eviction.GetNamespace(), eviction.GetName()); err != nil {
+				return false, nil, fmt.Errorf("unable to delete pod %v/%v: %v", eviction.GetNamespace(), eviction.GetName(), err)
+			}
+			return true, nil, nil
+		}
+		// fallback to the default reactor
+		return false, nil, nil
+	})
+
+	klog.V(3).Infof("Pulling resources for the cached client from the cluster")
+	pods, err := podInformer.Lister().List(labels.Everything())
+	if err != nil {
+		return nil, fmt.Errorf("unable to list pods: %v", err)
+	}
+
+	for _, item := range pods {
+		if _, err := fakeClient.CoreV1().Pods(item.Namespace).Create(context.TODO(), item, metav1.CreateOptions{}); err != nil {
+			return nil, fmt.Errorf("unable to copy pod: %v", err)
+		}
+	}
+
+	nodes, err := nodeInformer.Lister().List(labels.Everything())
+	if err != nil {
+		return nil, fmt.Errorf("unable to list nodes: %v", err)
+	}
+
+	for _, item := range nodes {
+		if _, err := fakeClient.CoreV1().Nodes().Create(context.TODO(), item, metav1.CreateOptions{}); err != nil {
+			return nil, fmt.Errorf("unable to copy node: %v", err)
+		}
+	}
+
+	namespaces, err := namespaceInformer.Lister().List(labels.Everything())
+	if err != nil {
+		return nil, fmt.Errorf("unable to list namespaces: %v", err)
+	}
+
+	for _, item := range namespaces {
+		if _, err := fakeClient.CoreV1().Namespaces().Create(context.TODO(), item, metav1.CreateOptions{}); err != nil {
+			return nil, fmt.Errorf("unable to copy node: %v", err)
+		}
+	}
+
+	priorityClasses, err := priorityClassInformer.Lister().List(labels.Everything())
+	if err != nil {
+		return nil, fmt.Errorf("unable to list priorityclasses: %v", err)
+	}
+
+	for _, item := range priorityClasses {
+		if _, err := fakeClient.SchedulingV1().PriorityClasses().Create(context.TODO(), item, metav1.CreateOptions{}); err != nil {
+			return nil, fmt.Errorf("unable to copy priorityclass: %v", err)
+		}
+	}
+
+	return fakeClient, nil
+}
 
 func RunDeschedulerStrategies(ctx context.Context, rs *options.DeschedulerServer, deschedulerPolicy *api.DeschedulerPolicy, evictionPolicyGroupVersion string, stopChannel chan struct{}) error {
 	sharedInformerFactory := informers.NewSharedInformerFactory(rs.Client, 0)
 	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
+	podInformer := sharedInformerFactory.Core().V1().Pods()
+	namespaceInformer := sharedInformerFactory.Core().V1().Namespaces()
+	priorityClassInformer := sharedInformerFactory.Scheduling().V1().PriorityClasses()
+
+	// create the informers
+	namespaceInformer.Informer()
+	priorityClassInformer.Informer()
+
+	getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+	if err != nil {
+		return fmt.Errorf("build get pods assigned to node function error: %v", err)
+	}
 
 	sharedInformerFactory.Start(stopChannel)
 	sharedInformerFactory.WaitForCacheSync(stopChannel)
@@ -83,18 +185,27 @@ func RunDeschedulerStrategies(ctx context.Context, rs *options.DeschedulerServer
 		"RemovePodsHavingTooManyRestarts":             strategies.RemovePodsHavingTooManyRestarts,
 		"PodLifeTime":                                 strategies.PodLifeTime,
 		"RemovePodsViolatingTopologySpreadConstraint": strategies.RemovePodsViolatingTopologySpreadConstraint,
+		"RemoveFailedPods":                            strategies.RemoveFailedPods,
 	}
 
-	nodeSelector := rs.NodeSelector
+	var nodeSelector string
 	if deschedulerPolicy.NodeSelector != nil {
 		nodeSelector = *deschedulerPolicy.NodeSelector
 	}
 
-	evictLocalStoragePods := rs.EvictLocalStoragePods
+	var evictLocalStoragePods bool
 	if deschedulerPolicy.EvictLocalStoragePods != nil {
 		evictLocalStoragePods = *deschedulerPolicy.EvictLocalStoragePods
 	}
 
+	evictBarePods := false
+	if deschedulerPolicy.EvictFailedBarePods != nil {
+		evictBarePods = *deschedulerPolicy.EvictFailedBarePods
+		if evictBarePods {
+			klog.V(1).InfoS("Warning: EvictFailedBarePods is set to True. This could cause eviction of pods without ownerReferences.")
+		}
+	}
+
 	evictSystemCriticalPods := false
 	if deschedulerPolicy.EvictSystemCriticalPods != nil {
 		evictSystemCriticalPods = *deschedulerPolicy.EvictSystemCriticalPods
@@ -108,12 +219,7 @@ func RunDeschedulerStrategies(ctx context.Context, rs *options.DeschedulerServer
 		ignorePvcPods = *deschedulerPolicy.IgnorePVCPods
 	}
 
-	maxNoOfPodsToEvictPerNode := rs.MaxNoOfPodsToEvictPerNode
-	if deschedulerPolicy.MaxNoOfPodsToEvictPerNode != nil {
-		maxNoOfPodsToEvictPerNode = *deschedulerPolicy.MaxNoOfPodsToEvictPerNode
-	}
-
-	wait.Until(func() {
+	wait.NonSlidingUntil(func() {
 		nodes, err := nodeutil.ReadyNodes(ctx, rs.Client, nodeInformer, nodeSelector)
 		if err != nil {
 			klog.V(1).InfoS("Unable to get ready nodes", "err", err)
@@ -127,21 +233,55 @@ func RunDeschedulerStrategies(ctx context.Context, rs *options.DeschedulerServer
 			return
 		}
 
+		var podEvictorClient clientset.Interface
+		// When the dry mode is enable, collect all the relevant objects (mostly pods) under a fake client.
+		// So when evicting pods while running multiple strategies in a row have the cummulative effect
+		// as is when evicting pods for real.
+		if rs.DryRun {
+			klog.V(3).Infof("Building a cached client from the cluster for the dry run")
+			// Create a new cache so we start from scratch without any leftovers
+			fakeClient, err := cachedClient(rs.Client, podInformer, nodeInformer, namespaceInformer, priorityClassInformer)
+			if err != nil {
+				klog.Error(err)
+				return
+			}
+
+			fakeSharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			getPodsAssignedToNode, err = podutil.BuildGetPodsAssignedToNodeFunc(fakeSharedInformerFactory.Core().V1().Pods())
+			if err != nil {
+				klog.Errorf("build get pods assigned to node function error: %v", err)
+				return
+			}
+
+			fakeCtx, cncl := context.WithCancel(context.TODO())
+			defer cncl()
+			fakeSharedInformerFactory.Start(fakeCtx.Done())
+			fakeSharedInformerFactory.WaitForCacheSync(fakeCtx.Done())
+
+			podEvictorClient = fakeClient
+		} else {
+			podEvictorClient = rs.Client
+		}
+
+		klog.V(3).Infof("Building a pod evictor")
 		podEvictor := evictions.NewPodEvictor(
-			rs.Client,
+			podEvictorClient,
 			evictionPolicyGroupVersion,
 			rs.DryRun,
-			maxNoOfPodsToEvictPerNode,
+			deschedulerPolicy.MaxNoOfPodsToEvictPerNode,
+			deschedulerPolicy.MaxNoOfPodsToEvictPerNamespace,
 			nodes,
 			evictLocalStoragePods,
 			evictSystemCriticalPods,
 			ignorePvcPods,
+			evictBarePods,
+			!rs.DisableMetrics,
 		)
 
 		for name, strategy := range deschedulerPolicy.Strategies {
 			if f, ok := strategyFuncs[name]; ok {
 				if strategy.Enabled {
-					f(ctx, rs.Client, strategy, nodes, podEvictor)
+					f(ctx, rs.Client, strategy, nodes, podEvictor, getPodsAssignedToNode)
 				}
 			} else {
 				klog.ErrorS(fmt.Errorf("unknown strategy name"), "skipping strategy", "strategy", name)

pkg/descheduler/descheduler_test.go

@@ -55,7 +55,7 @@ func TestTaintsUpdated(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Unable to run descheduler strategies: %v", err)
 		}
-	case <-time.After(300 * time.Millisecond):
+	case <-time.After(1 * time.Second):
 		// Wait for few cycles and then verify the only pod still exists
 	}
 

pkg/descheduler/evictions/evictions.go

@@ -45,57 +45,70 @@ const (
 )
 
 // nodePodEvictedCount keeps count of pods evicted on node
-type nodePodEvictedCount map[*v1.Node]int
+type nodePodEvictedCount map[*v1.Node]uint
+type namespacePodEvictCount map[string]uint
 
 type PodEvictor struct {
-	client                  clientset.Interface
-	nodes                   []*v1.Node
-	policyGroupVersion      string
-	dryRun                  bool
-	maxPodsToEvictPerNode   int
-	nodepodCount            nodePodEvictedCount
-	evictLocalStoragePods   bool
-	evictSystemCriticalPods bool
-	ignorePvcPods           bool
+	client                     clientset.Interface
+	nodes                      []*v1.Node
+	policyGroupVersion         string
+	dryRun                     bool
+	maxPodsToEvictPerNode      *uint
+	maxPodsToEvictPerNamespace *uint
+	nodepodCount               nodePodEvictedCount
+	namespacePodCount          namespacePodEvictCount
+	evictFailedBarePods        bool
+	evictLocalStoragePods      bool
+	evictSystemCriticalPods    bool
+	ignorePvcPods              bool
+	metricsEnabled             bool
 }
 
 func NewPodEvictor(
 	client clientset.Interface,
 	policyGroupVersion string,
 	dryRun bool,
-	maxPodsToEvictPerNode int,
+	maxPodsToEvictPerNode *uint,
+	maxPodsToEvictPerNamespace *uint,
 	nodes []*v1.Node,
 	evictLocalStoragePods bool,
 	evictSystemCriticalPods bool,
 	ignorePvcPods bool,
+	evictFailedBarePods bool,
+	metricsEnabled bool,
 ) *PodEvictor {
 	var nodePodCount = make(nodePodEvictedCount)
+	var namespacePodCount = make(namespacePodEvictCount)
 	for _, node := range nodes {
 		// Initialize podsEvicted till now with 0.
 		nodePodCount[node] = 0
 	}
 
 	return &PodEvictor{
-		client:                  client,
-		nodes:                   nodes,
-		policyGroupVersion:      policyGroupVersion,
-		dryRun:                  dryRun,
-		maxPodsToEvictPerNode:   maxPodsToEvictPerNode,
-		nodepodCount:            nodePodCount,
-		evictLocalStoragePods:   evictLocalStoragePods,
-		evictSystemCriticalPods: evictSystemCriticalPods,
-		ignorePvcPods:           ignorePvcPods,
+		client:                     client,
+		nodes:                      nodes,
+		policyGroupVersion:         policyGroupVersion,
+		dryRun:                     dryRun,
+		maxPodsToEvictPerNode:      maxPodsToEvictPerNode,
+		maxPodsToEvictPerNamespace: maxPodsToEvictPerNamespace,
+		nodepodCount:               nodePodCount,
+		namespacePodCount:          namespacePodCount,
+		evictLocalStoragePods:      evictLocalStoragePods,
+		evictSystemCriticalPods:    evictSystemCriticalPods,
+		evictFailedBarePods:        evictFailedBarePods,
+		ignorePvcPods:              ignorePvcPods,
+		metricsEnabled:             metricsEnabled,
 	}
 }
 
 // NodeEvicted gives a number of pods evicted for node
-func (pe *PodEvictor) NodeEvicted(node *v1.Node) int {
+func (pe *PodEvictor) NodeEvicted(node *v1.Node) uint {
 	return pe.nodepodCount[node]
 }
 
 // TotalEvicted gives a number of pods evicted through all nodes
-func (pe *PodEvictor) TotalEvicted() int {
-	var total int
+func (pe *PodEvictor) TotalEvicted() uint {
+	var total uint
 	for _, count := range pe.nodepodCount {
 		total += count
 	}
@@ -110,20 +123,37 @@ func (pe *PodEvictor) EvictPod(ctx context.Context, pod *v1.Pod, node *v1.Node,
 	if len(reasons) > 0 {
 		reason += " (" + strings.Join(reasons, ", ") + ")"
 	}
-	if pe.maxPodsToEvictPerNode > 0 && pe.nodepodCount[node]+1 > pe.maxPodsToEvictPerNode {
-		metrics.PodsEvicted.With(map[string]string{"result": "maximum number reached", "strategy": strategy, "namespace": pod.Namespace}).Inc()
-		return false, fmt.Errorf("Maximum number %v of evicted pods per %q node reached", pe.maxPodsToEvictPerNode, node.Name)
+	if pe.maxPodsToEvictPerNode != nil && pe.nodepodCount[node]+1 > *pe.maxPodsToEvictPerNode {
+		if pe.metricsEnabled {
+			metrics.PodsEvicted.With(map[string]string{"result": "maximum number of pods per node reached", "strategy": strategy, "namespace": pod.Namespace, "node": node.Name}).Inc()
+		}
+		return false, fmt.Errorf("Maximum number %v of evicted pods per %q node reached", *pe.maxPodsToEvictPerNode, node.Name)
 	}
 
-	err := evictPod(ctx, pe.client, pod, pe.policyGroupVersion, pe.dryRun)
+	if pe.maxPodsToEvictPerNamespace != nil && pe.namespacePodCount[pod.Namespace]+1 > *pe.maxPodsToEvictPerNamespace {
+		if pe.metricsEnabled {
+			metrics.PodsEvicted.With(map[string]string{"result": "maximum number of pods per namespace reached", "strategy": strategy, "namespace": pod.Namespace, "node": node.Name}).Inc()
+		}
+		return false, fmt.Errorf("Maximum number %v of evicted pods per %q namespace reached", *pe.maxPodsToEvictPerNamespace, pod.Namespace)
+	}
+
+	err := evictPod(ctx, pe.client, pod, pe.policyGroupVersion)
 	if err != nil {
 		// err is used only for logging purposes
 		klog.ErrorS(err, "Error evicting pod", "pod", klog.KObj(pod), "reason", reason)
-		metrics.PodsEvicted.With(map[string]string{"result": "error", "strategy": strategy, "namespace": pod.Namespace}).Inc()
+		if pe.metricsEnabled {
+			metrics.PodsEvicted.With(map[string]string{"result": "error", "strategy": strategy, "namespace": pod.Namespace, "node": node.Name}).Inc()
+		}
 		return false, nil
 	}
 
 	pe.nodepodCount[node]++
+	pe.namespacePodCount[pod.Namespace]++
+
+	if pe.metricsEnabled {
+		metrics.PodsEvicted.With(map[string]string{"result": "success", "strategy": strategy, "namespace": pod.Namespace, "node": node.Name}).Inc()
+	}
+
 	if pe.dryRun {
 		klog.V(1).InfoS("Evicted pod in dry run mode", "pod", klog.KObj(pod), "reason", reason)
 	} else {
@@ -133,15 +163,11 @@ func (pe *PodEvictor) EvictPod(ctx context.Context, pod *v1.Pod, node *v1.Node,
 		eventBroadcaster.StartRecordingToSink(&clientcorev1.EventSinkImpl{Interface: pe.client.CoreV1().Events(pod.Namespace)})
 		r := eventBroadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: "sigs.k8s.io.descheduler"})
 		r.Event(pod, v1.EventTypeNormal, "Descheduled", fmt.Sprintf("pod evicted by sigs.k8s.io/descheduler%s", reason))
-		metrics.PodsEvicted.With(map[string]string{"result": "success", "strategy": strategy, "namespace": pod.Namespace}).Inc()
 	}
 	return true, nil
 }
 
-func evictPod(ctx context.Context, client clientset.Interface, pod *v1.Pod, policyGroupVersion string, dryRun bool) error {
-	if dryRun {
-		return nil
-	}
+func evictPod(ctx context.Context, client clientset.Interface, pod *v1.Pod, policyGroupVersion string) error {
 	deleteOptions := &metav1.DeleteOptions{}
 	// GracePeriodSeconds ?
 	eviction := &policy.Eviction{
@@ -215,6 +241,25 @@ func (pe *PodEvictor) Evictable(opts ...func(opts *Options)) *evictable {
 	}
 
 	ev := &evictable{}
+	if pe.evictFailedBarePods {
+		ev.constraints = append(ev.constraints, func(pod *v1.Pod) error {
+			ownerRefList := podutil.OwnerRef(pod)
+			// Enable evictFailedBarePods to evict bare pods in failed phase
+			if len(ownerRefList) == 0 && pod.Status.Phase != v1.PodFailed {
+				return fmt.Errorf("pod does not have any ownerRefs and is not in failed phase")
+			}
+			return nil
+		})
+	} else {
+		ev.constraints = append(ev.constraints, func(pod *v1.Pod) error {
+			ownerRefList := podutil.OwnerRef(pod)
+			// Moved from IsEvictable function for backward compatibility
+			if len(ownerRefList) == 0 {
+				return fmt.Errorf("pod does not have any ownerRefs")
+			}
+			return nil
+		})
+	}
 	if !pe.evictSystemCriticalPods {
 		ev.constraints = append(ev.constraints, func(pod *v1.Pod) error {
 			// Moved from IsEvictable function to allow for disabling
@@ -278,10 +323,6 @@ func (ev *evictable) IsEvictable(pod *v1.Pod) bool {
 		checkErrs = append(checkErrs, fmt.Errorf("pod is a DaemonSet pod"))
 	}
 
-	if len(ownerRefList) == 0 {
-		checkErrs = append(checkErrs, fmt.Errorf("pod does not have any ownerrefs"))
-	}
-
 	if utils.IsMirrorPod(pod) {
 		checkErrs = append(checkErrs, fmt.Errorf("pod is a mirror pod"))
 	}
@@ -290,6 +331,10 @@ func (ev *evictable) IsEvictable(pod *v1.Pod) bool {
 		checkErrs = append(checkErrs, fmt.Errorf("pod is a static pod"))
 	}
 
+	if utils.IsPodTerminating(pod) {
+		checkErrs = append(checkErrs, fmt.Errorf("pod is terminating"))
+	}
+
 	for _, c := range ev.constraints {
 		if err := c(pod); err != nil {
 			checkErrs = append(checkErrs, err)

pkg/descheduler/evictions/evictions_test.go

@@ -62,7 +62,7 @@ func TestEvictPod(t *testing.T) {
 		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
 			return true, &v1.PodList{Items: test.pods}, nil
 		})
-		got := evictPod(ctx, fakeClient, test.pod, "v1", false)
+		got := evictPod(ctx, fakeClient, test.pod, "v1")
 		if got != test.want {
 			t.Errorf("Test error for Desc: %s. Expected %v pod eviction to be %v, got %v", test.description, test.pod.Name, test.want, got)
 		}
@@ -83,6 +83,7 @@ func TestIsEvictable(t *testing.T) {
 		pod                     *v1.Pod
 		nodes                   []*v1.Node
 		runBefore               func(*v1.Pod, []*v1.Node)
+		evictFailedBarePods     bool
 		evictLocalStoragePods   bool
 		evictSystemCriticalPods bool
 		priorityThreshold       *int32
@@ -91,7 +92,27 @@ func TestIsEvictable(t *testing.T) {
 	}
 
 	testCases := []testCase{
-		{ // Normal pod eviction with normal ownerRefs
+		{ // Failed pod eviction with no ownerRefs.
+			pod: test.BuildTestPod("bare_pod_failed", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
+				pod.Status.Phase = v1.PodFailed
+			},
+			evictFailedBarePods: false,
+			result:              false,
+		}, { // Normal pod eviction with no ownerRefs and evictFailedBarePods enabled
+			pod: test.BuildTestPod("bare_pod", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
+			},
+			evictFailedBarePods: true,
+			result:              false,
+		}, { // Failed pod eviction with no ownerRefs
+			pod: test.BuildTestPod("bare_pod_failed_but_can_be_evicted", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
+				pod.Status.Phase = v1.PodFailed
+			},
+			evictFailedBarePods: true,
+			result:              true,
+		}, { // Normal pod eviction with normal ownerRefs
 			pod: test.BuildTestPod("p1", 400, 0, n1.Name, nil),
 			runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
 				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
@@ -417,6 +438,7 @@ func TestIsEvictable(t *testing.T) {
 		podEvictor := &PodEvictor{
 			evictLocalStoragePods:   test.evictLocalStoragePods,
 			evictSystemCriticalPods: test.evictSystemCriticalPods,
+			evictFailedBarePods:     test.evictFailedBarePods,
 			nodes:                   nodes,
 		}
 

pkg/descheduler/pod/pods.go

@@ -17,139 +17,174 @@ limitations under the License.
 package pod
 
 import (
-	"context"
 	"sort"
 
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/apimachinery/pkg/fields"
-	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/sets"
+	coreinformers "k8s.io/client-go/informers/core/v1"
+	"k8s.io/client-go/tools/cache"
+
 	"sigs.k8s.io/descheduler/pkg/utils"
 )
 
+const (
+	nodeNameKeyIndex = "spec.nodeName"
+)
+
+// FilterFunc is a filter for a pod.
+type FilterFunc func(*v1.Pod) bool
+
+// GetPodsAssignedToNodeFunc is a function which accept a node name and a pod filter function
+// as input and returns the pods that assigned to the node.
+type GetPodsAssignedToNodeFunc func(string, FilterFunc) ([]*v1.Pod, error)
+
+// WrapFilterFuncs wraps a set of FilterFunc in one.
+func WrapFilterFuncs(filters ...FilterFunc) FilterFunc {
+	return func(pod *v1.Pod) bool {
+		for _, filter := range filters {
+			if filter != nil && !filter(pod) {
+				return false
+			}
+		}
+		return true
+	}
+}
+
 type Options struct {
-	filter             func(pod *v1.Pod) bool
-	includedNamespaces []string
-	excludedNamespaces []string
+	filter             FilterFunc
+	includedNamespaces sets.String
+	excludedNamespaces sets.String
 	labelSelector      *metav1.LabelSelector
 }
 
+// NewOptions returns an empty Options.
+func NewOptions() *Options {
+	return &Options{}
+}
+
 // WithFilter sets a pod filter.
 // The filter function should return true if the pod should be returned from ListPodsOnANode
-func WithFilter(filter func(pod *v1.Pod) bool) func(opts *Options) {
-	return func(opts *Options) {
-		opts.filter = filter
-	}
+func (o *Options) WithFilter(filter FilterFunc) *Options {
+	o.filter = filter
+	return o
 }
 
 // WithNamespaces sets included namespaces
-func WithNamespaces(namespaces []string) func(opts *Options) {
-	return func(opts *Options) {
-		opts.includedNamespaces = namespaces
-	}
+func (o *Options) WithNamespaces(namespaces sets.String) *Options {
+	o.includedNamespaces = namespaces
+	return o
 }
 
 // WithoutNamespaces sets excluded namespaces
-func WithoutNamespaces(namespaces []string) func(opts *Options) {
-	return func(opts *Options) {
-		opts.excludedNamespaces = namespaces
-	}
+func (o *Options) WithoutNamespaces(namespaces sets.String) *Options {
+	o.excludedNamespaces = namespaces
+	return o
 }
 
 // WithLabelSelector sets a pod label selector
-func WithLabelSelector(labelSelector *metav1.LabelSelector) func(opts *Options) {
-	return func(opts *Options) {
-		opts.labelSelector = labelSelector
-	}
+func (o *Options) WithLabelSelector(labelSelector *metav1.LabelSelector) *Options {
+	o.labelSelector = labelSelector
+	return o
 }
 
-// ListPodsOnANode lists all of the pods on a node
-// It also accepts an optional "filter" function which can be used to further limit the pods that are returned.
-// (Usually this is podEvictor.Evictable().IsEvictable, in order to only list the evictable pods on a node, but can
-// be used by strategies to extend it if there are further restrictions, such as with NodeAffinity).
-func ListPodsOnANode(
-	ctx context.Context,
-	client clientset.Interface,
-	node *v1.Node,
-	opts ...func(opts *Options),
-) ([]*v1.Pod, error) {
-	options := &Options{}
-	for _, opt := range opts {
-		opt(options)
-	}
-
-	pods := make([]*v1.Pod, 0)
-
-	fieldSelectorString := "spec.nodeName=" + node.Name + ",status.phase!=" + string(v1.PodSucceeded) + ",status.phase!=" + string(v1.PodFailed)
-
-	labelSelectorString := ""
-	if options.labelSelector != nil {
-		selector, err := metav1.LabelSelectorAsSelector(options.labelSelector)
+// BuildFilterFunc builds a final FilterFunc based on Options.
+func (o *Options) BuildFilterFunc() (FilterFunc, error) {
+	var s labels.Selector
+	var err error
+	if o.labelSelector != nil {
+		s, err = metav1.LabelSelectorAsSelector(o.labelSelector)
 		if err != nil {
-			return []*v1.Pod{}, err
+			return nil, err
 		}
-		labelSelectorString = selector.String()
 	}
-
-	if len(options.includedNamespaces) > 0 {
-		fieldSelector, err := fields.ParseSelector(fieldSelectorString)
-		if err != nil {
-			return []*v1.Pod{}, err
+	return func(pod *v1.Pod) bool {
+		if o.filter != nil && !o.filter(pod) {
+			return false
 		}
+		if len(o.includedNamespaces) > 0 && !o.includedNamespaces.Has(pod.Namespace) {
+			return false
+		}
+		if len(o.excludedNamespaces) > 0 && o.excludedNamespaces.Has(pod.Namespace) {
+			return false
+		}
+		if s != nil && !s.Matches(labels.Set(pod.GetLabels())) {
+			return false
+		}
+		return true
+	}, nil
+}
 
-		for _, namespace := range options.includedNamespaces {
-			podList, err := client.CoreV1().Pods(namespace).List(ctx,
-				metav1.ListOptions{
-					FieldSelector: fieldSelector.String(),
-					LabelSelector: labelSelectorString,
-				})
-			if err != nil {
-				return []*v1.Pod{}, err
+// BuildGetPodsAssignedToNodeFunc establishes an indexer to map the pods and their assigned nodes.
+// It returns a function to help us get all the pods that assigned to a node based on the indexer.
+func BuildGetPodsAssignedToNodeFunc(podInformer coreinformers.PodInformer) (GetPodsAssignedToNodeFunc, error) {
+	// Establish an indexer to map the pods and their assigned nodes.
+	err := podInformer.Informer().AddIndexers(cache.Indexers{
+		nodeNameKeyIndex: func(obj interface{}) ([]string, error) {
+			pod, ok := obj.(*v1.Pod)
+			if !ok {
+				return []string{}, nil
 			}
-			for i := range podList.Items {
-				if options.filter != nil && !options.filter(&podList.Items[i]) {
-					continue
-				}
-				pods = append(pods, &podList.Items[i])
+			if len(pod.Spec.NodeName) == 0 {
+				return []string{}, nil
+			}
+			return []string{pod.Spec.NodeName}, nil
+		},
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	// The indexer helps us get all the pods that assigned to a node.
+	podIndexer := podInformer.Informer().GetIndexer()
+	getPodsAssignedToNode := func(nodeName string, filter FilterFunc) ([]*v1.Pod, error) {
+		objs, err := podIndexer.ByIndex(nodeNameKeyIndex, nodeName)
+		if err != nil {
+			return nil, err
+		}
+		pods := make([]*v1.Pod, 0, len(objs))
+		for _, obj := range objs {
+			pod, ok := obj.(*v1.Pod)
+			if !ok {
+				continue
+			}
+			if filter(pod) {
+				pods = append(pods, pod)
 			}
 		}
 		return pods, nil
 	}
+	return getPodsAssignedToNode, nil
+}
 
-	if len(options.excludedNamespaces) > 0 {
-		for _, namespace := range options.excludedNamespaces {
-			fieldSelectorString += ",metadata.namespace!=" + namespace
-		}
+// ListPodsOnANode lists all pods on a node.
+// It also accepts a "filter" function which can be used to further limit the pods that are returned.
+// (Usually this is podEvictor.Evictable().IsEvictable, in order to only list the evictable pods on a node, but can
+// be used by strategies to extend it if there are further restrictions, such as with NodeAffinity).
+func ListPodsOnANode(
+	nodeName string,
+	getPodsAssignedToNode GetPodsAssignedToNodeFunc,
+	filter FilterFunc,
+) ([]*v1.Pod, error) {
+	// Succeeded and failed pods are not considered because they don't occupy any resource.
+	f := func(pod *v1.Pod) bool {
+		return pod.Status.Phase != v1.PodSucceeded && pod.Status.Phase != v1.PodFailed
 	}
+	return ListAllPodsOnANode(nodeName, getPodsAssignedToNode, WrapFilterFuncs(f, filter))
+}
 
-	fieldSelector, err := fields.ParseSelector(fieldSelectorString)
+// ListAllPodsOnANode lists all the pods on a node no matter what the phase of the pod is.
+func ListAllPodsOnANode(
+	nodeName string,
+	getPodsAssignedToNode GetPodsAssignedToNodeFunc,
+	filter FilterFunc,
+) ([]*v1.Pod, error) {
+	pods, err := getPodsAssignedToNode(nodeName, filter)
 	if err != nil {
 		return []*v1.Pod{}, err
 	}
 
-	// INFO(jchaloup): field selectors do not work properly with listers
-	// Once the descheduler switches to pod listers (through informers),
-	// We need to flip to client-side filtering.
-	podList, err := client.CoreV1().Pods(v1.NamespaceAll).List(ctx,
-		metav1.ListOptions{
-			FieldSelector: fieldSelector.String(),
-			LabelSelector: labelSelectorString,
-		})
-	if err != nil {
-		return []*v1.Pod{}, err
-	}
-
-	for i := range podList.Items {
-		// fake client does not support field selectors
-		// so let's filter based on the node name as well (quite cheap)
-		if podList.Items[i].Spec.NodeName != node.Name {
-			continue
-		}
-		if options.filter != nil && !options.filter(&podList.Items[i]) {
-			continue
-		}
-		pods = append(pods, &podList.Items[i])
-	}
 	return pods, nil
 }
 

pkg/descheduler/pod/pods_test.go

@@ -18,16 +18,15 @@ package pod
 
 import (
 	"context"
-	"fmt"
 	"reflect"
-	"strings"
 	"testing"
 
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/test"
 )
 
@@ -39,19 +38,17 @@ var (
 func TestListPodsOnANode(t *testing.T) {
 	testCases := []struct {
 		name             string
-		pods             map[string][]v1.Pod
+		pods             []*v1.Pod
 		node             *v1.Node
 		labelSelector    *metav1.LabelSelector
 		expectedPodCount int
 	}{
 		{
 			name: "test listing pods on a node",
-			pods: map[string][]v1.Pod{
-				"n1": {
-					*test.BuildTestPod("pod1", 100, 0, "n1", nil),
-					*test.BuildTestPod("pod2", 100, 0, "n1", nil),
-				},
-				"n2": {*test.BuildTestPod("pod3", 100, 0, "n2", nil)},
+			pods: []*v1.Pod{
+				test.BuildTestPod("pod1", 100, 0, "n1", nil),
+				test.BuildTestPod("pod2", 100, 0, "n1", nil),
+				test.BuildTestPod("pod3", 100, 0, "n2", nil),
 			},
 			node:             test.BuildTestNode("n1", 2000, 3000, 10, nil),
 			labelSelector:    nil,
@@ -59,17 +56,15 @@ func TestListPodsOnANode(t *testing.T) {
 		},
 		{
 			name: "test listing pods with label selector",
-			pods: map[string][]v1.Pod{
-				"n1": {
-					*test.BuildTestPod("pod1", 100, 0, "n1", nil),
-					*test.BuildTestPod("pod2", 100, 0, "n1", func(pod *v1.Pod) {
-						pod.Labels = map[string]string{"foo": "bar"}
-					}),
-					*test.BuildTestPod("pod3", 100, 0, "n1", func(pod *v1.Pod) {
-						pod.Labels = map[string]string{"foo": "bar1"}
-					}),
-				},
-				"n2": {*test.BuildTestPod("pod4", 100, 0, "n2", nil)},
+			pods: []*v1.Pod{
+				test.BuildTestPod("pod1", 100, 0, "n1", nil),
+				test.BuildTestPod("pod2", 100, 0, "n1", func(pod *v1.Pod) {
+					pod.Labels = map[string]string{"foo": "bar"}
+				}),
+				test.BuildTestPod("pod3", 100, 0, "n1", func(pod *v1.Pod) {
+					pod.Labels = map[string]string{"foo": "bar1"}
+				}),
+				test.BuildTestPod("pod4", 100, 0, "n2", nil),
 			},
 			node: test.BuildTestNode("n1", 2000, 3000, 10, nil),
 			labelSelector: &metav1.LabelSelector{
@@ -85,21 +80,38 @@ func TestListPodsOnANode(t *testing.T) {
 		},
 	}
 	for _, testCase := range testCases {
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			list := action.(core.ListAction)
-			fieldString := list.GetListRestrictions().Fields.String()
-			if strings.Contains(fieldString, "n1") {
-				return true, &v1.PodList{Items: testCase.pods["n1"]}, nil
-			} else if strings.Contains(fieldString, "n2") {
-				return true, &v1.PodList{Items: testCase.pods["n2"]}, nil
+		t.Run(testCase.name, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			objs = append(objs, testCase.node)
+			for _, pod := range testCase.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			filter, err := NewOptions().WithLabelSelector(testCase.labelSelector).BuildFilterFunc()
+			if err != nil {
+				t.Errorf("Build filter function error: %v", err)
+			}
+
+			pods, _ := ListPodsOnANode(testCase.node.Name, getPodsAssignedToNode, filter)
+			if len(pods) != testCase.expectedPodCount {
+				t.Errorf("Expected %v pods on node %v, got %+v", testCase.expectedPodCount, testCase.node.Name, len(pods))
 			}
-			return true, nil, fmt.Errorf("Failed to list: %v", list)
 		})
-		pods, _ := ListPodsOnANode(context.TODO(), fakeClient, testCase.node, WithLabelSelector(testCase.labelSelector))
-		if len(pods) != testCase.expectedPodCount {
-			t.Errorf("expected %v pods on node %v, got %+v", testCase.expectedPodCount, testCase.node.Name, len(pods))
-		}
 	}
 }
 

pkg/descheduler/strategies/duplicates.go

@@ -66,6 +66,7 @@ func RemoveDuplicatePods(
 	strategy api.DeschedulerStrategy,
 	nodes []*v1.Node,
 	podEvictor *evictions.PodEvictor,
+	getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc,
 ) {
 	if err := validateRemoveDuplicatePodsParams(strategy.Params); err != nil {
 		klog.ErrorS(err, "Invalid RemoveDuplicatePods parameters")
@@ -77,10 +78,10 @@ func RemoveDuplicatePods(
 		return
 	}
 
-	var includedNamespaces, excludedNamespaces []string
+	var includedNamespaces, excludedNamespaces sets.String
 	if strategy.Params != nil && strategy.Params.Namespaces != nil {
-		includedNamespaces = strategy.Params.Namespaces.Include
-		excludedNamespaces = strategy.Params.Namespaces.Exclude
+		includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
+		excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
 	}
 
 	nodeFit := false
@@ -95,15 +96,19 @@ func RemoveDuplicatePods(
 	nodeCount := 0
 	nodeMap := make(map[string]*v1.Node)
 
+	podFilter, err := podutil.NewOptions().
+		WithFilter(evictable.IsEvictable).
+		WithNamespaces(includedNamespaces).
+		WithoutNamespaces(excludedNamespaces).
+		BuildFilterFunc()
+	if err != nil {
+		klog.ErrorS(err, "Error initializing pod filter function")
+		return
+	}
+
 	for _, node := range nodes {
 		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(ctx,
-			client,
-			node,
-			podutil.WithFilter(evictable.IsEvictable),
-			podutil.WithNamespaces(includedNamespaces),
-			podutil.WithoutNamespaces(excludedNamespaces),
-		)
+		pods, err := podutil.ListPodsOnANode(node.Name, getPodsAssignedToNode, podFilter)
 		if err != nil {
 			klog.ErrorS(err, "Error listing evictable pods on node", "node", klog.KObj(node))
 			continue

pkg/descheduler/strategies/duplicates_test.go

@@ -25,10 +25,12 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )
@@ -43,7 +45,6 @@ func buildTestPodWithImage(podName, node, image string) *v1.Pod {
 }
 
 func TestFindDuplicatePods(t *testing.T) {
-	ctx := context.Background()
 	// first setup pods
 	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
 	node2 := test.BuildTestNode("n2", 2000, 3000, 10, nil)
@@ -173,104 +174,91 @@ func TestFindDuplicatePods(t *testing.T) {
 
 	testCases := []struct {
 		description             string
-		maxPodsToEvictPerNode   int
-		pods                    []v1.Pod
+		pods                    []*v1.Pod
 		nodes                   []*v1.Node
-		expectedEvictedPodCount int
+		expectedEvictedPodCount uint
 		strategy                api.DeschedulerStrategy
 	}{
 		{
 			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet. 1 should be evicted.",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 1,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet, but ReplicaSet kind is excluded. 0 should be evicted.",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{RemoveDuplicates: &api.RemoveDuplicates{ExcludeOwnerKinds: []string{"ReplicaSet"}}}},
 		},
 		{
 			description:             "Three Pods in the `test` Namespace, bound to same ReplicaSet. 1 should be evicted.",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p8, *p9, *p10},
+			pods:                    []*v1.Pod{p8, p9, p10},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 1,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Three Pods in the `dev` Namespace, three Pods in the `test` Namespace. Bound to ReplicaSet with same name. 4 should be evicted.",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p1, *p2, *p3, *p8, *p9, *p10},
+			pods:                    []*v1.Pod{p1, p2, p3, p8, p9, p10},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 2,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Pods are: part of DaemonSet, with local storage, mirror pod annotation, critical pod annotation - none should be evicted.",
-			maxPodsToEvictPerNode:   2,
-			pods:                    []v1.Pod{*p4, *p5, *p6, *p7},
+			pods:                    []*v1.Pod{p4, p5, p6, p7},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Test all Pods: 4 should be evicted.",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p1, *p2, *p3, *p4, *p5, *p6, *p7, *p8, *p9, *p10},
+			pods:                    []*v1.Pod{p1, p2, p3, p4, p5, p6, p7, p8, p9, p10},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 2,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Pods with the same owner but different images should not be evicted",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p11, *p12},
+			pods:                    []*v1.Pod{p11, p12},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Pods with multiple containers should not match themselves",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p13},
+			pods:                    []*v1.Pod{p13},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Pods with matching ownerrefs and at not all matching image should not trigger an eviction",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p11, *p13},
+			pods:                    []*v1.Pod{p11, p13},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet. Only node available has a taint, and nodeFit set to true. 0 should be evicted.",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node3},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{NodeFit: true}},
 		},
 		{
 			description:             "Three pods in the `node-fit` Namespace, bound to same ReplicaSet, all with a nodeSelector. Only node available has an incorrect node label, and nodeFit set to true. 0 should be evicted.",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p15, *p16, *p17},
+			pods:                    []*v1.Pod{p15, p16, p17},
 			nodes:                   []*v1.Node{node1, node4},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{NodeFit: true}},
 		},
 		{
 			description:             "Three pods in the `node-fit` Namespace, bound to same ReplicaSet. Only node available is not schedulable, and nodeFit set to true. 0 should be evicted.",
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node5},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{NodeFit: true}},
@@ -279,22 +267,44 @@ func TestFindDuplicatePods(t *testing.T) {
 
 	for _, testCase := range testCases {
 		t.Run(testCase.description, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				return true, &v1.PodList{Items: testCase.pods}, nil
-			})
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range testCase.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range testCase.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
 				"v1",
 				false,
-				testCase.maxPodsToEvictPerNode,
+				nil,
+				nil,
 				testCase.nodes,
 				false,
 				false,
 				false,
+				false,
+				false,
 			)
 
-			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor)
+			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor, getPodsAssignedToNode)
 			podsEvicted := podEvictor.TotalEvicted()
 			if podsEvicted != testCase.expectedEvictedPodCount {
 				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", testCase.description, testCase.expectedEvictedPodCount, podsEvicted)
@@ -305,8 +315,6 @@ func TestFindDuplicatePods(t *testing.T) {
 }
 
 func TestRemoveDuplicatesUniformly(t *testing.T) {
-	ctx := context.Background()
-
 	setRSOwnerRef2 := func(pod *v1.Pod) {
 		pod.ObjectMeta.OwnerReferences = []metav1.OwnerReference{
 			{Kind: "ReplicaSet", APIVersion: "v1", Name: "replicaset-2"},
@@ -432,25 +440,24 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 
 	testCases := []struct {
 		description             string
-		maxPodsToEvictPerNode   int
-		pods                    []v1.Pod
+		pods                    []*v1.Pod
 		nodes                   []*v1.Node
-		expectedEvictedPodCount int
+		expectedEvictedPodCount uint
 		strategy                api.DeschedulerStrategy
 	}{
 		{
 			description: "Evict pods uniformly",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1) -> (3,3,3) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p3", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p4", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p5", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p6", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p7", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p8", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p9", 100, 0, "n3", test.SetRSOwnerRef),
+				test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p9", 100, 0, "n3", test.SetRSOwnerRef),
 			},
 			expectedEvictedPodCount: 2,
 			nodes: []*v1.Node{
@@ -462,17 +469,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly with one node left out",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1) -> (4,4,1) -> 1 eviction
-				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p3", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p4", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p5", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p6", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p7", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p8", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p9", 100, 0, "n3", test.SetRSOwnerRef),
+				test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p9", 100, 0, "n3", test.SetRSOwnerRef),
 			},
 			expectedEvictedPodCount: 1,
 			nodes: []*v1.Node{
@@ -483,17 +490,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly with two replica sets",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1) -> (3,3,3) -> 2 evictions
-				*test.BuildTestPod("p11", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p12", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p13", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p14", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p15", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p16", 100, 0, "n2", setTwoRSOwnerRef),
-				*test.BuildTestPod("p17", 100, 0, "n2", setTwoRSOwnerRef),
-				*test.BuildTestPod("p18", 100, 0, "n2", setTwoRSOwnerRef),
-				*test.BuildTestPod("p19", 100, 0, "n3", setTwoRSOwnerRef),
+				test.BuildTestPod("p11", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p12", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p13", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p14", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p15", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p16", 100, 0, "n2", setTwoRSOwnerRef),
+				test.BuildTestPod("p17", 100, 0, "n2", setTwoRSOwnerRef),
+				test.BuildTestPod("p18", 100, 0, "n2", setTwoRSOwnerRef),
+				test.BuildTestPod("p19", 100, 0, "n3", setTwoRSOwnerRef),
 			},
 			expectedEvictedPodCount: 4,
 			nodes: []*v1.Node{
@@ -505,27 +512,27 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly with two owner references",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1) -> (3,3,3) -> 2 evictions
-				*test.BuildTestPod("p11", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p12", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p13", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p14", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p15", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p16", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p17", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p18", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p19", 100, 0, "n3", test.SetRSOwnerRef),
+				test.BuildTestPod("p11", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p12", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p13", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p14", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p15", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p16", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p17", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p18", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p19", 100, 0, "n3", test.SetRSOwnerRef),
 				// (1,3,5) -> (3,3,3) -> 2 evictions
-				*test.BuildTestPod("p21", 100, 0, "n1", setRSOwnerRef2),
-				*test.BuildTestPod("p22", 100, 0, "n2", setRSOwnerRef2),
-				*test.BuildTestPod("p23", 100, 0, "n2", setRSOwnerRef2),
-				*test.BuildTestPod("p24", 100, 0, "n2", setRSOwnerRef2),
-				*test.BuildTestPod("p25", 100, 0, "n3", setRSOwnerRef2),
-				*test.BuildTestPod("p26", 100, 0, "n3", setRSOwnerRef2),
-				*test.BuildTestPod("p27", 100, 0, "n3", setRSOwnerRef2),
-				*test.BuildTestPod("p28", 100, 0, "n3", setRSOwnerRef2),
-				*test.BuildTestPod("p29", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p21", 100, 0, "n1", setRSOwnerRef2),
+				test.BuildTestPod("p22", 100, 0, "n2", setRSOwnerRef2),
+				test.BuildTestPod("p23", 100, 0, "n2", setRSOwnerRef2),
+				test.BuildTestPod("p24", 100, 0, "n2", setRSOwnerRef2),
+				test.BuildTestPod("p25", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p26", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p27", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p28", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p29", 100, 0, "n3", setRSOwnerRef2),
 			},
 			expectedEvictedPodCount: 4,
 			nodes: []*v1.Node{
@@ -537,10 +544,10 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods with number of pods less than nodes",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (2,0,0) -> (1,1,0) -> 1 eviction
-				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
 			},
 			expectedEvictedPodCount: 1,
 			nodes: []*v1.Node{
@@ -552,14 +559,14 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods with number of pods less than nodes, but ignore different pods with the same ownerref",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (1, 0, 0) for "bar","baz" images -> no eviction, even with a matching ownerKey
 				// (2, 0, 0) for "foo" image -> (1,1,0) - 1 eviction
 				// In this case the only "real" duplicates are p1 and p4, so one of those should be evicted
-				*buildTestPodWithImage("p1", "n1", "foo"),
-				*buildTestPodWithImage("p2", "n1", "bar"),
-				*buildTestPodWithImage("p3", "n1", "baz"),
-				*buildTestPodWithImage("p4", "n1", "foo"),
+				buildTestPodWithImage("p1", "n1", "foo"),
+				buildTestPodWithImage("p2", "n1", "bar"),
+				buildTestPodWithImage("p3", "n1", "baz"),
+				buildTestPodWithImage("p4", "n1", "foo"),
 			},
 			expectedEvictedPodCount: 1,
 			nodes: []*v1.Node{
@@ -571,9 +578,9 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods with a single pod with three nodes",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (2,0,0) -> (1,1,0) -> 1 eviction
-				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
 			},
 			expectedEvictedPodCount: 0,
 			nodes: []*v1.Node{
@@ -585,17 +592,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly respecting taints",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1,0,0,0) -> (3,3,3,0,0,0) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "worker1", setTolerationsK1),
-				*test.BuildTestPod("p2", 100, 0, "worker1", setTolerationsK2),
-				*test.BuildTestPod("p3", 100, 0, "worker1", setTolerationsK1),
-				*test.BuildTestPod("p4", 100, 0, "worker1", setTolerationsK2),
-				*test.BuildTestPod("p5", 100, 0, "worker1", setTolerationsK1),
-				*test.BuildTestPod("p6", 100, 0, "worker2", setTolerationsK2),
-				*test.BuildTestPod("p7", 100, 0, "worker2", setTolerationsK1),
-				*test.BuildTestPod("p8", 100, 0, "worker2", setTolerationsK2),
-				*test.BuildTestPod("p9", 100, 0, "worker3", setTolerationsK1),
+				test.BuildTestPod("p1", 100, 0, "worker1", setTolerationsK1),
+				test.BuildTestPod("p2", 100, 0, "worker1", setTolerationsK2),
+				test.BuildTestPod("p3", 100, 0, "worker1", setTolerationsK1),
+				test.BuildTestPod("p4", 100, 0, "worker1", setTolerationsK2),
+				test.BuildTestPod("p5", 100, 0, "worker1", setTolerationsK1),
+				test.BuildTestPod("p6", 100, 0, "worker2", setTolerationsK2),
+				test.BuildTestPod("p7", 100, 0, "worker2", setTolerationsK1),
+				test.BuildTestPod("p8", 100, 0, "worker2", setTolerationsK2),
+				test.BuildTestPod("p9", 100, 0, "worker3", setTolerationsK1),
 			},
 			expectedEvictedPodCount: 2,
 			nodes: []*v1.Node{
@@ -610,17 +617,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly respecting RequiredDuringSchedulingIgnoredDuringExecution node affinity",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1,0,0,0) -> (3,3,3,0,0,0) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "worker1", setNotMasterNodeSelectorK1),
-				*test.BuildTestPod("p2", 100, 0, "worker1", setNotMasterNodeSelectorK2),
-				*test.BuildTestPod("p3", 100, 0, "worker1", setNotMasterNodeSelectorK1),
-				*test.BuildTestPod("p4", 100, 0, "worker1", setNotMasterNodeSelectorK2),
-				*test.BuildTestPod("p5", 100, 0, "worker1", setNotMasterNodeSelectorK1),
-				*test.BuildTestPod("p6", 100, 0, "worker2", setNotMasterNodeSelectorK2),
-				*test.BuildTestPod("p7", 100, 0, "worker2", setNotMasterNodeSelectorK1),
-				*test.BuildTestPod("p8", 100, 0, "worker2", setNotMasterNodeSelectorK2),
-				*test.BuildTestPod("p9", 100, 0, "worker3", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p1", 100, 0, "worker1", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p2", 100, 0, "worker1", setNotMasterNodeSelectorK2),
+				test.BuildTestPod("p3", 100, 0, "worker1", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p4", 100, 0, "worker1", setNotMasterNodeSelectorK2),
+				test.BuildTestPod("p5", 100, 0, "worker1", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p6", 100, 0, "worker2", setNotMasterNodeSelectorK2),
+				test.BuildTestPod("p7", 100, 0, "worker2", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p8", 100, 0, "worker2", setNotMasterNodeSelectorK2),
+				test.BuildTestPod("p9", 100, 0, "worker3", setNotMasterNodeSelectorK1),
 			},
 			expectedEvictedPodCount: 2,
 			nodes: []*v1.Node{
@@ -635,17 +642,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly respecting node selector",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1,0,0,0) -> (3,3,3,0,0,0) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p2", 100, 0, "worker1", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p3", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p4", 100, 0, "worker1", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p5", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p6", 100, 0, "worker2", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p7", 100, 0, "worker2", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p8", 100, 0, "worker2", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p9", 100, 0, "worker3", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p1", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p2", 100, 0, "worker1", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p3", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p4", 100, 0, "worker1", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p5", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p6", 100, 0, "worker2", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p7", 100, 0, "worker2", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p8", 100, 0, "worker2", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p9", 100, 0, "worker3", setWorkerLabelSelectorK1),
 			},
 			expectedEvictedPodCount: 2,
 			nodes: []*v1.Node{
@@ -660,17 +667,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly respecting node selector with zero target nodes",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1,0,0,0) -> (3,3,3,0,0,0) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p2", 100, 0, "worker1", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p3", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p4", 100, 0, "worker1", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p5", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p6", 100, 0, "worker2", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p7", 100, 0, "worker2", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p8", 100, 0, "worker2", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p9", 100, 0, "worker3", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p1", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p2", 100, 0, "worker1", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p3", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p4", 100, 0, "worker1", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p5", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p6", 100, 0, "worker2", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p7", 100, 0, "worker2", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p8", 100, 0, "worker2", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p9", 100, 0, "worker3", setWorkerLabelSelectorK1),
 			},
 			expectedEvictedPodCount: 0,
 			nodes: []*v1.Node{
@@ -687,22 +694,44 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 
 	for _, testCase := range testCases {
 		t.Run(testCase.description, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				return true, &v1.PodList{Items: testCase.pods}, nil
-			})
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range testCase.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range testCase.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
 				policyv1.SchemeGroupVersion.String(),
 				false,
-				testCase.maxPodsToEvictPerNode,
+				nil,
+				nil,
 				testCase.nodes,
 				false,
 				false,
 				false,
+				false,
+				false,
 			)
 
-			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor)
+			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor, getPodsAssignedToNode)
 			podsEvicted := podEvictor.TotalEvicted()
 			if podsEvicted != testCase.expectedEvictedPodCount {
 				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", testCase.description, testCase.expectedEvictedPodCount, podsEvicted)

pkg/descheduler/strategies/failedpods.go

@@ -0,0 +1,179 @@
+package strategies
+
+import (
+	"context"
+	"fmt"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
+	"k8s.io/apimachinery/pkg/util/sets"
+	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/klog/v2"
+
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/descheduler/strategies/validation"
+)
+
+// validatedFailedPodsStrategyParams contains validated strategy parameters
+type validatedFailedPodsStrategyParams struct {
+	validation.ValidatedStrategyParams
+	includingInitContainers bool
+	reasons                 sets.String
+	excludeOwnerKinds       sets.String
+	minPodLifetimeSeconds   *uint
+}
+
+// RemoveFailedPods removes Pods that are in failed status phase.
+func RemoveFailedPods(
+	ctx context.Context,
+	client clientset.Interface,
+	strategy api.DeschedulerStrategy,
+	nodes []*v1.Node,
+	podEvictor *evictions.PodEvictor,
+	getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc,
+) {
+	strategyParams, err := validateAndParseRemoveFailedPodsParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Invalid RemoveFailedPods parameters")
+		return
+	}
+
+	evictable := podEvictor.Evictable(
+		evictions.WithPriorityThreshold(strategyParams.ThresholdPriority),
+		evictions.WithNodeFit(strategyParams.NodeFit),
+		evictions.WithLabelSelector(strategyParams.LabelSelector),
+	)
+
+	var labelSelector *metav1.LabelSelector
+	if strategy.Params != nil {
+		labelSelector = strategy.Params.LabelSelector
+	}
+
+	podFilter, err := podutil.NewOptions().
+		WithFilter(evictable.IsEvictable).
+		WithNamespaces(strategyParams.IncludedNamespaces).
+		WithoutNamespaces(strategyParams.ExcludedNamespaces).
+		WithLabelSelector(labelSelector).
+		BuildFilterFunc()
+	if err != nil {
+		klog.ErrorS(err, "Error initializing pod filter function")
+		return
+	}
+	// Only list failed pods
+	phaseFilter := func(pod *v1.Pod) bool { return pod.Status.Phase == v1.PodFailed }
+	podFilter = podutil.WrapFilterFuncs(phaseFilter, podFilter)
+
+	for _, node := range nodes {
+		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
+		pods, err := podutil.ListAllPodsOnANode(node.Name, getPodsAssignedToNode, podFilter)
+		if err != nil {
+			klog.ErrorS(err, "Error listing a nodes failed pods", "node", klog.KObj(node))
+			continue
+		}
+
+		for i, pod := range pods {
+			if err = validateFailedPodShouldEvict(pod, *strategyParams); err != nil {
+				klog.V(4).InfoS(fmt.Sprintf("ignoring pod for eviction due to: %s", err.Error()), "pod", klog.KObj(pod))
+				continue
+			}
+
+			if _, err = podEvictor.EvictPod(ctx, pods[i], node, "FailedPod"); err != nil {
+				klog.ErrorS(err, "Error evicting pod", "pod", klog.KObj(pod))
+				break
+			}
+		}
+	}
+}
+
+func validateAndParseRemoveFailedPodsParams(
+	ctx context.Context,
+	client clientset.Interface,
+	params *api.StrategyParameters,
+) (*validatedFailedPodsStrategyParams, error) {
+	if params == nil {
+		return &validatedFailedPodsStrategyParams{
+			ValidatedStrategyParams: validation.DefaultValidatedStrategyParams(),
+		}, nil
+	}
+
+	strategyParams, err := validation.ValidateAndParseStrategyParams(ctx, client, params)
+	if err != nil {
+		return nil, err
+	}
+
+	var reasons, excludeOwnerKinds sets.String
+	var includingInitContainers bool
+	var minPodLifetimeSeconds *uint
+	if params.FailedPods != nil {
+		reasons = sets.NewString(params.FailedPods.Reasons...)
+		includingInitContainers = params.FailedPods.IncludingInitContainers
+		excludeOwnerKinds = sets.NewString(params.FailedPods.ExcludeOwnerKinds...)
+		minPodLifetimeSeconds = params.FailedPods.MinPodLifetimeSeconds
+	}
+
+	return &validatedFailedPodsStrategyParams{
+		ValidatedStrategyParams: *strategyParams,
+		includingInitContainers: includingInitContainers,
+		reasons:                 reasons,
+		excludeOwnerKinds:       excludeOwnerKinds,
+		minPodLifetimeSeconds:   minPodLifetimeSeconds,
+	}, nil
+}
+
+// validateFailedPodShouldEvict looks at strategy params settings to see if the Pod
+// should be evicted given the params in the PodFailed policy.
+func validateFailedPodShouldEvict(pod *v1.Pod, strategyParams validatedFailedPodsStrategyParams) error {
+	var errs []error
+
+	if strategyParams.minPodLifetimeSeconds != nil {
+		podAgeSeconds := uint(metav1.Now().Sub(pod.GetCreationTimestamp().Local()).Seconds())
+		if podAgeSeconds < *strategyParams.minPodLifetimeSeconds {
+			errs = append(errs, fmt.Errorf("pod does not exceed the min age seconds of %d", *strategyParams.minPodLifetimeSeconds))
+		}
+	}
+
+	if len(strategyParams.excludeOwnerKinds) > 0 {
+		ownerRefList := podutil.OwnerRef(pod)
+		for _, owner := range ownerRefList {
+			if strategyParams.excludeOwnerKinds.Has(owner.Kind) {
+				errs = append(errs, fmt.Errorf("pod's owner kind of %s is excluded", owner.Kind))
+			}
+		}
+	}
+
+	if len(strategyParams.reasons) > 0 {
+		reasons := getFailedContainerStatusReasons(pod.Status.ContainerStatuses)
+
+		if pod.Status.Phase == v1.PodFailed && pod.Status.Reason != "" {
+			reasons = append(reasons, pod.Status.Reason)
+		}
+
+		if strategyParams.includingInitContainers {
+			reasons = append(reasons, getFailedContainerStatusReasons(pod.Status.InitContainerStatuses)...)
+		}
+
+		if !strategyParams.reasons.HasAny(reasons...) {
+			errs = append(errs, fmt.Errorf("pod does not match any of the reasons"))
+		}
+	}
+
+	return utilerrors.NewAggregate(errs)
+}
+
+func getFailedContainerStatusReasons(containerStatuses []v1.ContainerStatus) []string {
+	reasons := make([]string, 0)
+
+	for _, containerStatus := range containerStatuses {
+		if containerStatus.State.Waiting != nil && containerStatus.State.Waiting.Reason != "" {
+			reasons = append(reasons, containerStatus.State.Waiting.Reason)
+		}
+		if containerStatus.State.Terminated != nil && containerStatus.State.Terminated.Reason != "" {
+			reasons = append(reasons, containerStatus.State.Terminated.Reason)
+		}
+	}
+
+	return reasons
+}

pkg/descheduler/strategies/failedpods_test.go

@@ -0,0 +1,343 @@
+package strategies
+
+import (
+	"context"
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+	policyv1 "k8s.io/api/policy/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
+	"k8s.io/client-go/kubernetes/fake"
+
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/test"
+)
+
+var (
+	OneHourInSeconds uint = 3600
+)
+
+func TestRemoveFailedPods(t *testing.T) {
+	createStrategy := func(enabled, includingInitContainers bool, reasons, excludeKinds []string, minAgeSeconds *uint, nodeFit bool) api.DeschedulerStrategy {
+		return api.DeschedulerStrategy{
+			Enabled: enabled,
+			Params: &api.StrategyParameters{
+				FailedPods: &api.FailedPods{
+					Reasons:                 reasons,
+					IncludingInitContainers: includingInitContainers,
+					ExcludeOwnerKinds:       excludeKinds,
+					MinPodLifetimeSeconds:   minAgeSeconds,
+				},
+				NodeFit: nodeFit,
+			},
+		}
+	}
+
+	tests := []struct {
+		description             string
+		nodes                   []*v1.Node
+		strategy                api.DeschedulerStrategy
+		expectedEvictedPodCount uint
+		pods                    []*v1.Pod
+	}{
+		{
+			description:             "default empty strategy, 0 failures, 0 evictions",
+			strategy:                api.DeschedulerStrategy{},
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 0,
+			pods:                    []*v1.Pod{}, // no pods come back with field selector phase=Failed
+		},
+		{
+			description:             "0 failures, 0 evictions",
+			strategy:                createStrategy(true, false, nil, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 0,
+			pods:                    []*v1.Pod{}, // no pods come back with field selector phase=Failed
+		},
+		{
+			description:             "1 container terminated with reason NodeAffinity, 1 eviction",
+			strategy:                createStrategy(true, false, nil, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 1,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", nil, &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
+				}), nil),
+			},
+		},
+		{
+			description:             "1 init container terminated with reason NodeAffinity, 1 eviction",
+			strategy:                createStrategy(true, true, nil, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 1,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
+				}, nil), nil),
+			},
+		},
+		{
+			description:             "1 init container waiting with reason CreateContainerConfigError, 1 eviction",
+			strategy:                createStrategy(true, true, nil, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 1,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", &v1.ContainerState{
+					Waiting: &v1.ContainerStateWaiting{Reason: "CreateContainerConfigError"},
+				}, nil), nil),
+			},
+		},
+		{
+			description: "2 init container waiting with reason CreateContainerConfigError, 2 nodes, 2 evictions",
+			strategy:    createStrategy(true, true, nil, nil, nil, false),
+			nodes: []*v1.Node{
+				test.BuildTestNode("node1", 2000, 3000, 10, nil),
+				test.BuildTestNode("node2", 2000, 3000, 10, nil),
+			},
+			expectedEvictedPodCount: 2,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "CreateContainerConfigError"},
+				}, nil), nil),
+				buildTestPod("p2", "node2", newPodStatus("", "", &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "CreateContainerConfigError"},
+				}, nil), nil),
+			},
+		},
+		{
+			description:             "include reason=CreateContainerConfigError, 1 container terminated with reason CreateContainerConfigError, 1 eviction",
+			strategy:                createStrategy(true, false, []string{"CreateContainerConfigError"}, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 1,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", nil, &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "CreateContainerConfigError"},
+				}), nil),
+			},
+		},
+		{
+			description:             "include reason=CreateContainerConfigError+NodeAffinity, 1 container terminated with reason CreateContainerConfigError, 1 eviction",
+			strategy:                createStrategy(true, false, []string{"CreateContainerConfigError", "NodeAffinity"}, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 1,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", nil, &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "CreateContainerConfigError"},
+				}), nil),
+			},
+		},
+		{
+			description:             "include reason=CreateContainerConfigError, 1 container terminated with reason NodeAffinity, 0 eviction",
+			strategy:                createStrategy(true, false, []string{"CreateContainerConfigError"}, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 0,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", nil, &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
+				}), nil),
+			},
+		},
+		{
+			description:             "include init container=false, 1 init container waiting with reason CreateContainerConfigError, 0 eviction",
+			strategy:                createStrategy(true, false, []string{"CreateContainerConfigError"}, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 0,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", &v1.ContainerState{
+					Waiting: &v1.ContainerStateWaiting{Reason: "CreateContainerConfigError"},
+				}, nil), nil),
+			},
+		},
+		{
+			description:             "lifetime 1 hour, 1 container terminated with reason NodeAffinity, 0 eviction",
+			strategy:                createStrategy(true, false, nil, nil, &OneHourInSeconds, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 0,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", nil, &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
+				}), nil),
+			},
+		},
+		{
+			description: "nodeFit=true, 1 unschedulable node, 1 container terminated with reason NodeAffinity, 0 eviction",
+			strategy:    createStrategy(true, false, nil, nil, nil, true),
+			nodes: []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, func(node *v1.Node) {
+				node.Spec.Unschedulable = true
+			})},
+			expectedEvictedPodCount: 0,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", nil, &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
+				}), nil),
+			},
+		},
+		{
+			description:             "excluded owner kind=ReplicaSet, 1 init container terminated with owner kind=ReplicaSet, 0 eviction",
+			strategy:                createStrategy(true, true, nil, []string{"ReplicaSet"}, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 0,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
+				}, nil), nil),
+			},
+		},
+		{
+			description:             "excluded owner kind=DaemonSet, 1 init container terminated with owner kind=ReplicaSet, 1 eviction",
+			strategy:                createStrategy(true, true, nil, []string{"DaemonSet"}, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 1,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
+				}, nil), nil),
+			},
+		},
+		{
+			description:             "excluded owner kind=DaemonSet, 1 init container terminated with owner kind=ReplicaSet, 1 pod in termination; nothing should be moved",
+			strategy:                createStrategy(true, true, nil, []string{"DaemonSet"}, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 0,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("", "", &v1.ContainerState{
+					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
+				}, nil), &metav1.Time{}),
+			},
+		},
+		{
+			description:             "1 container terminated with reason ShutDown, 0 evictions",
+			strategy:                createStrategy(true, false, nil, nil, nil, true),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 0,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("Shutdown", v1.PodFailed, nil, nil), nil),
+			},
+		},
+		{
+			description:             "include reason=Shutdown, 2 containers terminated with reason ShutDown, 2 evictions",
+			strategy:                createStrategy(true, false, []string{"Shutdown"}, nil, nil, false),
+			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
+			expectedEvictedPodCount: 2,
+			pods: []*v1.Pod{
+				buildTestPod("p1", "node1", newPodStatus("Shutdown", v1.PodFailed, nil, nil), nil),
+				buildTestPod("p2", "node1", newPodStatus("Shutdown", v1.PodFailed, nil, nil), nil),
+			},
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				policyv1.SchemeGroupVersion.String(),
+				false,
+				nil,
+				nil,
+				tc.nodes,
+				false,
+				false,
+				false,
+				false,
+				false,
+			)
+
+			RemoveFailedPods(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
+			actualEvictedPodCount := podEvictor.TotalEvicted()
+			if actualEvictedPodCount != tc.expectedEvictedPodCount {
+				t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
+			}
+		})
+	}
+}
+
+func TestValidRemoveFailedPodsParams(t *testing.T) {
+	ctx := context.Background()
+	fakeClient := &fake.Clientset{}
+	testCases := []struct {
+		name   string
+		params *api.StrategyParameters
+	}{
+		{name: "validate nil params", params: nil},
+		{name: "validate empty params", params: &api.StrategyParameters{}},
+		{name: "validate reasons params", params: &api.StrategyParameters{FailedPods: &api.FailedPods{
+			Reasons: []string{"CreateContainerConfigError"},
+		}}},
+		{name: "validate includingInitContainers params", params: &api.StrategyParameters{FailedPods: &api.FailedPods{
+			IncludingInitContainers: true,
+		}}},
+		{name: "validate excludeOwnerKinds params", params: &api.StrategyParameters{FailedPods: &api.FailedPods{
+			ExcludeOwnerKinds: []string{"Job"},
+		}}},
+		{name: "validate excludeOwnerKinds params", params: &api.StrategyParameters{FailedPods: &api.FailedPods{
+			MinPodLifetimeSeconds: &OneHourInSeconds,
+		}}},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			params, err := validateAndParseRemoveFailedPodsParams(ctx, fakeClient, tc.params)
+			if err != nil {
+				t.Errorf("strategy params should be valid but got err: %v", err.Error())
+			}
+			if params == nil {
+				t.Errorf("strategy params should return a ValidatedFailedPodsStrategyParams but got nil")
+			}
+		})
+	}
+}
+
+func newPodStatus(reason string, phase v1.PodPhase, initContainerState, containerState *v1.ContainerState) v1.PodStatus {
+	ps := v1.PodStatus{
+		Reason: reason,
+		Phase:  phase,
+	}
+
+	if initContainerState != nil {
+		ps.InitContainerStatuses = []v1.ContainerStatus{{State: *initContainerState}}
+		ps.Phase = v1.PodFailed
+	}
+
+	if containerState != nil {
+		ps.ContainerStatuses = []v1.ContainerStatus{{State: *containerState}}
+		ps.Phase = v1.PodFailed
+	}
+
+	return ps
+}
+
+func buildTestPod(podName, nodeName string, podStatus v1.PodStatus, deletionTimestamp *metav1.Time) *v1.Pod {
+	pod := test.BuildTestPod(podName, 1, 1, nodeName, func(p *v1.Pod) {
+		p.Status = podStatus
+	})
+	pod.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
+	pod.ObjectMeta.SetCreationTimestamp(metav1.Now())
+	pod.DeletionTimestamp = deletionTimestamp
+	return pod
+}

pkg/descheduler/strategies/node_affinity.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 
 	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/util/sets"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
 
@@ -47,7 +48,7 @@ func validatePodsViolatingNodeAffinityParams(params *api.StrategyParameters) err
 }
 
 // RemovePodsViolatingNodeAffinity evicts pods on nodes which violate node affinity
-func RemovePodsViolatingNodeAffinity(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+func RemovePodsViolatingNodeAffinity(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
 	if err := validatePodsViolatingNodeAffinityParams(strategy.Params); err != nil {
 		klog.ErrorS(err, "Invalid RemovePodsViolatingNodeAffinity parameters")
 		return
@@ -58,10 +59,10 @@ func RemovePodsViolatingNodeAffinity(ctx context.Context, client clientset.Inter
 		return
 	}
 
-	var includedNamespaces, excludedNamespaces []string
+	var includedNamespaces, excludedNamespaces sets.String
 	if strategy.Params.Namespaces != nil {
-		includedNamespaces = strategy.Params.Namespaces.Include
-		excludedNamespaces = strategy.Params.Namespaces.Exclude
+		includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
+		excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
 	}
 
 	nodeFit := false
@@ -71,6 +72,16 @@ func RemovePodsViolatingNodeAffinity(ctx context.Context, client clientset.Inter
 
 	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority), evictions.WithNodeFit(nodeFit))
 
+	podFilter, err := podutil.NewOptions().
+		WithNamespaces(includedNamespaces).
+		WithoutNamespaces(excludedNamespaces).
+		WithLabelSelector(strategy.Params.LabelSelector).
+		BuildFilterFunc()
+	if err != nil {
+		klog.ErrorS(err, "Error initializing pod filter function")
+		return
+	}
+
 	for _, nodeAffinity := range strategy.Params.NodeAffinityType {
 		klog.V(2).InfoS("Executing for nodeAffinityType", "nodeAffinity", nodeAffinity)
 
@@ -80,17 +91,13 @@ func RemovePodsViolatingNodeAffinity(ctx context.Context, client clientset.Inter
 				klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
 
 				pods, err := podutil.ListPodsOnANode(
-					ctx,
-					client,
-					node,
-					podutil.WithFilter(func(pod *v1.Pod) bool {
+					node.Name,
+					getPodsAssignedToNode,
+					podutil.WrapFilterFuncs(podFilter, func(pod *v1.Pod) bool {
 						return evictable.IsEvictable(pod) &&
 							!nodeutil.PodFitsCurrentNode(pod, node) &&
 							nodeutil.PodFitsAnyNode(pod, nodes)
 					}),
-					podutil.WithNamespaces(includedNamespaces),
-					podutil.WithoutNamespaces(excludedNamespaces),
-					podutil.WithLabelSelector(strategy.Params.LabelSelector),
 				)
 				if err != nil {
 					klog.ErrorS(err, "Failed to get pods", "node", klog.KObj(node))

pkg/descheduler/strategies/node_affinity_test.go

@@ -22,16 +22,18 @@ import (
 
 	v1 "k8s.io/api/core/v1"
 	policyv1 "k8s.io/api/policy/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )
 
 func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
-	ctx := context.Background()
 	requiredDuringSchedulingIgnoredDuringExecutionStrategy := api.DeschedulerStrategy{
 		Enabled: true,
 		Params: &api.StrategyParameters{
@@ -59,10 +61,10 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 	nodeWithoutLabels := test.BuildTestNode("nodeWithoutLabels", 2000, 3000, 10, nil)
 
 	unschedulableNodeWithLabels := test.BuildTestNode("unschedulableNodeWithLabels", 2000, 3000, 10, nil)
-	nodeWithLabels.Labels[nodeLabelKey] = nodeLabelValue
+	unschedulableNodeWithLabels.Labels[nodeLabelKey] = nodeLabelValue
 	unschedulableNodeWithLabels.Spec.Unschedulable = true
 
-	addPodsToNode := func(node *v1.Node) []v1.Pod {
+	addPodsToNode := func(node *v1.Node, deletionTimestamp *metav1.Time) []*v1.Pod {
 		podWithNodeAffinity := test.BuildTestPod("podWithNodeAffinity", 100, 0, node.Name, nil)
 		podWithNodeAffinity.Spec.Affinity = &v1.Affinity{
 			NodeAffinity: &v1.NodeAffinity{
@@ -91,20 +93,25 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 		pod1.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 		pod2.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 
-		return []v1.Pod{
-			*podWithNodeAffinity,
-			*pod1,
-			*pod2,
+		pod1.DeletionTimestamp = deletionTimestamp
+		pod2.DeletionTimestamp = deletionTimestamp
+
+		return []*v1.Pod{
+			podWithNodeAffinity,
+			pod1,
+			pod2,
 		}
 	}
 
+	var uint1 uint = 1
 	tests := []struct {
-		description             string
-		nodes                   []*v1.Node
-		pods                    []v1.Pod
-		strategy                api.DeschedulerStrategy
-		expectedEvictedPodCount int
-		maxPodsToEvictPerNode   int
+		description                    string
+		nodes                          []*v1.Node
+		pods                           []*v1.Pod
+		strategy                       api.DeschedulerStrategy
+		expectedEvictedPodCount        uint
+		maxPodsToEvictPerNode          *uint
+		maxNoOfPodsToEvictPerNamespace *uint
 	}{
 		{
 			description: "Invalid strategy type, should not evict any pods",
@@ -117,74 +124,116 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 				},
 			},
 			expectedEvictedPodCount: 0,
-			pods:                    addPodsToNode(nodeWithoutLabels),
+			pods:                    addPodsToNode(nodeWithoutLabels, nil),
 			nodes:                   []*v1.Node{nodeWithoutLabels, nodeWithLabels},
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Pod is correctly scheduled on node, no eviction expected",
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionStrategy,
 			expectedEvictedPodCount: 0,
-			pods:                    addPodsToNode(nodeWithLabels),
+			pods:                    addPodsToNode(nodeWithLabels, nil),
 			nodes:                   []*v1.Node{nodeWithLabels},
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Pod is scheduled on node without matching labels, another schedulable node available, should be evicted",
 			expectedEvictedPodCount: 1,
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionStrategy,
-			pods:                    addPodsToNode(nodeWithoutLabels),
+			pods:                    addPodsToNode(nodeWithoutLabels, nil),
 			nodes:                   []*v1.Node{nodeWithoutLabels, nodeWithLabels},
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Pod is scheduled on node without matching labels, another schedulable node available, maxPodsToEvictPerNode set to 1, should not be evicted",
 			expectedEvictedPodCount: 1,
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionStrategy,
-			pods:                    addPodsToNode(nodeWithoutLabels),
+			pods:                    addPodsToNode(nodeWithoutLabels, nil),
 			nodes:                   []*v1.Node{nodeWithoutLabels, nodeWithLabels},
-			maxPodsToEvictPerNode:   1,
+			maxPodsToEvictPerNode:   &uint1,
+		},
+		{
+			description:             "Pod is scheduled on node without matching labels, another schedulable node available, maxPodsToEvictPerNode set to 1, no pod evicted since pod terminting",
+			expectedEvictedPodCount: 1,
+			strategy:                requiredDuringSchedulingIgnoredDuringExecutionStrategy,
+			pods:                    addPodsToNode(nodeWithoutLabels, &metav1.Time{}),
+			nodes:                   []*v1.Node{nodeWithoutLabels, nodeWithLabels},
+			maxPodsToEvictPerNode:   &uint1,
+		},
+		{
+			description:                    "Pod is scheduled on node without matching labels, another schedulable node available, maxNoOfPodsToEvictPerNamespace set to 1, should not be evicted",
+			expectedEvictedPodCount:        1,
+			strategy:                       requiredDuringSchedulingIgnoredDuringExecutionStrategy,
+			pods:                           addPodsToNode(nodeWithoutLabels, nil),
+			nodes:                          []*v1.Node{nodeWithoutLabels, nodeWithLabels},
+			maxNoOfPodsToEvictPerNamespace: &uint1,
+		},
+		{
+			description:                    "Pod is scheduled on node without matching labels, another schedulable node available, maxNoOfPodsToEvictPerNamespace set to 1, no pod evicted since pod terminting",
+			expectedEvictedPodCount:        1,
+			strategy:                       requiredDuringSchedulingIgnoredDuringExecutionStrategy,
+			pods:                           addPodsToNode(nodeWithoutLabels, &metav1.Time{}),
+			nodes:                          []*v1.Node{nodeWithoutLabels, nodeWithLabels},
+			maxNoOfPodsToEvictPerNamespace: &uint1,
 		},
 		{
 			description:             "Pod is scheduled on node without matching labels, but no node where pod fits is available, should not evict",
 			expectedEvictedPodCount: 0,
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionWithNodeFitStrategy,
-			pods:                    addPodsToNode(nodeWithoutLabels),
+			pods:                    addPodsToNode(nodeWithoutLabels, nil),
 			nodes:                   []*v1.Node{nodeWithoutLabels, unschedulableNodeWithLabels},
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Pod is scheduled on node without matching labels, and node where pod fits is available, should evict",
 			expectedEvictedPodCount: 0,
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionWithNodeFitStrategy,
-			pods:                    addPodsToNode(nodeWithoutLabels),
+			pods:                    addPodsToNode(nodeWithoutLabels, nil),
 			nodes:                   []*v1.Node{nodeWithLabels, unschedulableNodeWithLabels},
-			maxPodsToEvictPerNode:   1,
+			maxPodsToEvictPerNode:   &uint1,
 		},
 	}
 
 	for _, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
 
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: tc.pods}, nil
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				policyv1.SchemeGroupVersion.String(),
+				false,
+				tc.maxPodsToEvictPerNode,
+				tc.maxNoOfPodsToEvictPerNamespace,
+				tc.nodes,
+				false,
+				false,
+				false,
+				false,
+				false,
+			)
+
+			RemovePodsViolatingNodeAffinity(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
+			actualEvictedPodCount := podEvictor.TotalEvicted()
+			if actualEvictedPodCount != tc.expectedEvictedPodCount {
+				t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
+			}
 		})
-
-		podEvictor := evictions.NewPodEvictor(
-			fakeClient,
-			policyv1.SchemeGroupVersion.String(),
-			false,
-			tc.maxPodsToEvictPerNode,
-			tc.nodes,
-			false,
-			false,
-			false,
-		)
-
-		RemovePodsViolatingNodeAffinity(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
-		actualEvictedPodCount := podEvictor.TotalEvicted()
-		if actualEvictedPodCount != tc.expectedEvictedPodCount {
-			t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
-		}
 	}
 }

pkg/descheduler/strategies/node_taint.go

@@ -20,6 +20,7 @@ import (
 	"context"
 	"fmt"
 
+	"k8s.io/apimachinery/pkg/util/sets"
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
@@ -48,18 +49,18 @@ func validateRemovePodsViolatingNodeTaintsParams(params *api.StrategyParameters)
 }
 
 // RemovePodsViolatingNodeTaints evicts pods on the node which violate NoSchedule Taints on nodes
-func RemovePodsViolatingNodeTaints(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+func RemovePodsViolatingNodeTaints(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
 	if err := validateRemovePodsViolatingNodeTaintsParams(strategy.Params); err != nil {
 		klog.ErrorS(err, "Invalid RemovePodsViolatingNodeTaints parameters")
 		return
 	}
 
-	var includedNamespaces, excludedNamespaces []string
+	var includedNamespaces, excludedNamespaces sets.String
 	var labelSelector *metav1.LabelSelector
 	if strategy.Params != nil {
 		if strategy.Params.Namespaces != nil {
-			includedNamespaces = strategy.Params.Namespaces.Include
-			excludedNamespaces = strategy.Params.Namespaces.Exclude
+			includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
+			excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
 		}
 		labelSelector = strategy.Params.LabelSelector
 	}
@@ -77,17 +78,20 @@ func RemovePodsViolatingNodeTaints(ctx context.Context, client clientset.Interfa
 
 	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority), evictions.WithNodeFit(nodeFit))
 
+	podFilter, err := podutil.NewOptions().
+		WithFilter(evictable.IsEvictable).
+		WithNamespaces(includedNamespaces).
+		WithoutNamespaces(excludedNamespaces).
+		WithLabelSelector(labelSelector).
+		BuildFilterFunc()
+	if err != nil {
+		klog.ErrorS(err, "Error initializing pod filter function")
+		return
+	}
+
 	for _, node := range nodes {
 		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(
-			ctx,
-			client,
-			node,
-			podutil.WithFilter(evictable.IsEvictable),
-			podutil.WithNamespaces(includedNamespaces),
-			podutil.WithoutNamespaces(excludedNamespaces),
-			podutil.WithLabelSelector(labelSelector),
-		)
+		pods, err := podutil.ListAllPodsOnANode(node.Name, getPodsAssignedToNode, podFilter)
 		if err != nil {
 			//no pods evicted as error encountered retrieving evictable Pods
 			return

pkg/descheduler/strategies/node_taint_test.go

@@ -9,10 +9,12 @@ import (
 	policyv1 "k8s.io/api/policy/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )
@@ -45,11 +47,10 @@ func addTolerationToPod(pod *v1.Pod, key, value string, index int) *v1.Pod {
 }
 
 func TestDeletePodsViolatingNodeTaints(t *testing.T) {
-	ctx := context.Background()
 	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
 	node1 = addTaintsToNode(node1, "testTaint", "test", []int{1})
 	node2 := test.BuildTestNode("n2", 2000, 3000, 10, nil)
-	node1 = addTaintsToNode(node2, "testingTaint", "testing", []int{1})
+	node2 = addTaintsToNode(node2, "testingTaint", "testing", []int{1})
 
 	node3 := test.BuildTestNode("n3", 2000, 3000, 10, func(node *v1.Node) {
 		node.ObjectMeta.Labels = map[string]string{
@@ -116,144 +117,168 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		"datacenter": "west",
 	}
 
+	var uint1 uint = 1
+
 	tests := []struct {
-		description             string
-		nodes                   []*v1.Node
-		pods                    []v1.Pod
-		evictLocalStoragePods   bool
-		evictSystemCriticalPods bool
-		maxPodsToEvictPerNode   int
-		expectedEvictedPodCount int
-		nodeFit                 bool
+		description                    string
+		nodes                          []*v1.Node
+		pods                           []*v1.Pod
+		evictLocalStoragePods          bool
+		evictSystemCriticalPods        bool
+		maxPodsToEvictPerNode          *uint
+		maxNoOfPodsToEvictPerNamespace *uint
+		expectedEvictedPodCount        uint
+		nodeFit                        bool
 	}{
 
 		{
 			description:             "Pods not tolerating node taint should be evicted",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 1, //p2 gets evicted
 		},
 		{
 			description:             "Pods with tolerations but not tolerating node taint should be evicted",
-			pods:                    []v1.Pod{*p1, *p3, *p4},
+			pods:                    []*v1.Pod{p1, p3, p4},
 			nodes:                   []*v1.Node{node1},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 1, //p4 gets evicted
 		},
 		{
 			description:             "Only <maxPodsToEvictPerNode> number of Pods not tolerating node taint should be evicted",
-			pods:                    []v1.Pod{*p1, *p5, *p6},
+			pods:                    []*v1.Pod{p1, p5, p6},
 			nodes:                   []*v1.Node{node1},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   1,
+			maxPodsToEvictPerNode:   &uint1,
 			expectedEvictedPodCount: 1, //p5 or p6 gets evicted
 		},
+		{
+			description:                    "Only <maxNoOfPodsToEvictPerNamespace> number of Pods not tolerating node taint should be evicted",
+			pods:                           []*v1.Pod{p1, p5, p6},
+			nodes:                          []*v1.Node{node1},
+			evictLocalStoragePods:          false,
+			evictSystemCriticalPods:        false,
+			maxNoOfPodsToEvictPerNamespace: &uint1,
+			expectedEvictedPodCount:        1, //p5 or p6 gets evicted
+		},
 		{
 			description:             "Critical pods not tolerating node taint should not be evicted",
-			pods:                    []v1.Pod{*p7, *p8, *p9, *p10},
+			pods:                    []*v1.Pod{p7, p8, p9, p10},
 			nodes:                   []*v1.Node{node2},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 0, //nothing is evicted
 		},
 		{
 			description:             "Critical pods except storage pods not tolerating node taint should not be evicted",
-			pods:                    []v1.Pod{*p7, *p8, *p9, *p10},
+			pods:                    []*v1.Pod{p7, p8, p9, p10},
 			nodes:                   []*v1.Node{node2},
 			evictLocalStoragePods:   true,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 1, //p9 gets evicted
 		},
 		{
 			description:             "Critical and non critical pods, only non critical pods not tolerating node taint should be evicted",
-			pods:                    []v1.Pod{*p7, *p8, *p10, *p11},
+			pods:                    []*v1.Pod{p7, p8, p10, p11},
 			nodes:                   []*v1.Node{node2},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 1, //p11 gets evicted
 		},
 		{
 			description:             "Critical and non critical pods, pods not tolerating node taint should be evicted even if they are critical",
-			pods:                    []v1.Pod{*p2, *p7, *p9, *p10},
-			nodes:                   []*v1.Node{node2},
+			pods:                    []*v1.Pod{p2, p7, p9, p10},
+			nodes:                   []*v1.Node{node1, node2},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: true,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 2, //p2 and p7 are evicted
 		},
 		{
 			description:             "Pod p2 doesn't tolerate taint on it's node, but also doesn't tolerate taints on other nodes",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node2},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 0, //p2 gets evicted
 			nodeFit:                 true,
 		},
 		{
 			description:             "Pod p12 doesn't tolerate taint on it's node, but other nodes don't match it's selector",
-			pods:                    []v1.Pod{*p1, *p3, *p12},
+			pods:                    []*v1.Pod{p1, p3, p12},
 			nodes:                   []*v1.Node{node1, node3},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 0, //p2 gets evicted
 			nodeFit:                 true,
 		},
 		{
 			description:             "Pod p2 doesn't tolerate taint on it's node, but other nodes are unschedulable",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node4},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
-			maxPodsToEvictPerNode:   0,
 			expectedEvictedPodCount: 0, //p2 gets evicted
 			nodeFit:                 true,
 		},
 	}
 
 	for _, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {
 
-		// create fake client
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: tc.pods}, nil
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				policyv1.SchemeGroupVersion.String(),
+				false,
+				tc.maxPodsToEvictPerNode,
+				tc.maxNoOfPodsToEvictPerNamespace,
+				tc.nodes,
+				tc.evictLocalStoragePods,
+				tc.evictSystemCriticalPods,
+				false,
+				false,
+				false,
+			)
+
+			strategy := api.DeschedulerStrategy{
+				Params: &api.StrategyParameters{
+					NodeFit: tc.nodeFit,
+				},
+			}
+
+			RemovePodsViolatingNodeTaints(ctx, fakeClient, strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
+			actualEvictedPodCount := podEvictor.TotalEvicted()
+			if actualEvictedPodCount != tc.expectedEvictedPodCount {
+				t.Errorf("Test %#v failed, Unexpected no of pods evicted: pods evicted: %d, expected: %d", tc.description, actualEvictedPodCount, tc.expectedEvictedPodCount)
+			}
 		})
-
-		podEvictor := evictions.NewPodEvictor(
-			fakeClient,
-			policyv1.SchemeGroupVersion.String(),
-			false,
-			tc.maxPodsToEvictPerNode,
-			tc.nodes,
-			tc.evictLocalStoragePods,
-			tc.evictSystemCriticalPods,
-			false,
-		)
-
-		strategy := api.DeschedulerStrategy{
-			Params: &api.StrategyParameters{
-				NodeFit: tc.nodeFit,
-			},
-		}
-
-		RemovePodsViolatingNodeTaints(ctx, fakeClient, strategy, tc.nodes, podEvictor)
-		actualEvictedPodCount := podEvictor.TotalEvicted()
-		if actualEvictedPodCount != tc.expectedEvictedPodCount {
-			t.Errorf("Test %#v failed, Unexpected no of pods evicted: pods evicted: %d, expected: %d", tc.description, actualEvictedPodCount, tc.expectedEvictedPodCount)
-		}
 	}
-
 }
 
 func TestToleratesTaint(t *testing.T) {

pkg/descheduler/strategies/nodeutilization/highnodeutilization.go

@@ -24,15 +24,17 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 )
 
 // HighNodeUtilization evicts pods from under utilized nodes so that scheduler can schedule according to its strategy.
 // Note that CPU/Memory requests are used to calculate nodes' utilization and not the actual resource usage.
-func HighNodeUtilization(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+func HighNodeUtilization(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
 	if err := validateNodeUtilizationParams(strategy.Params); err != nil {
 		klog.ErrorS(err, "Invalid HighNodeUtilization parameters")
 		return
@@ -61,7 +63,7 @@ func HighNodeUtilization(ctx context.Context, client clientset.Interface, strate
 	resourceNames := getResourceNames(targetThresholds)
 
 	sourceNodes, highNodes := classifyNodes(
-		getNodeUsage(ctx, client, nodes, thresholds, targetThresholds, resourceNames),
+		getNodeUsage(nodes, thresholds, targetThresholds, resourceNames, getPodsAssignedToNode),
 		func(node *v1.Node, usage NodeUsage) bool {
 			return isNodeWithLowUtilization(usage)
 		},
@@ -92,8 +94,8 @@ func HighNodeUtilization(ctx context.Context, client clientset.Interface, strate
 		klog.V(1).InfoS("No node is underutilized, nothing to do here, you might tune your thresholds further")
 		return
 	}
-	if len(sourceNodes) < strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes {
-		klog.V(1).InfoS("Number of nodes underutilized is less than NumberOfNodes, nothing to do here", "underutilizedNodes", len(sourceNodes), "numberOfNodes", strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes)
+	if len(sourceNodes) <= strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes {
+		klog.V(1).InfoS("Number of nodes underutilized is less or equal than NumberOfNodes, nothing to do here", "underutilizedNodes", len(sourceNodes), "numberOfNodes", strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes)
 		return
 	}
 	if len(sourceNodes) == len(nodes) {

pkg/descheduler/strategies/nodeutilization/highnodeutilization_test.go

@@ -19,23 +19,24 @@ package nodeutilization
 import (
 	"context"
 	"fmt"
-	"strings"
 	"testing"
 
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/api/policy/v1beta1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )
 
 func TestHighNodeUtilization(t *testing.T) {
-	ctx := context.Background()
 	n1NodeName := "n1"
 	n2NodeName := "n2"
 	n3NodeName := "n3"
@@ -44,13 +45,12 @@ func TestHighNodeUtilization(t *testing.T) {
 	nodeSelectorValue := "west"
 
 	testCases := []struct {
-		name                  string
-		thresholds            api.ResourceThresholds
-		nodes                 map[string]*v1.Node
-		pods                  map[string]*v1.PodList
-		maxPodsToEvictPerNode int
-		expectedPodsEvicted   int
-		evictedPods           []string
+		name                string
+		thresholds          api.ResourceThresholds
+		nodes               []*v1.Node
+		pods                []*v1.Pod
+		expectedPodsEvicted uint
+		evictedPods         []string
 	}{
 		{
 			name: "no node below threshold usage",
@@ -58,39 +58,26 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  20,
 				v1.ResourcePods: 20,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, nil),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, nil),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p8", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p9", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+			pods: []*v1.Pod{
+				// These won't be evicted.
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				// These won't be evicted.
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				// These won't be evicted.
+				test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p9", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   0,
+			expectedPodsEvicted: 0,
 		},
 		{
 			name: "no evictable pods",
@@ -98,57 +85,44 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  40,
 				v1.ResourcePods: 40,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, nil),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, nil),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
-							// A pod with local storage.
-							test.SetNormalOwnerRef(pod)
-							pod.Spec.Volumes = []v1.Volume{
-								{
-									Name: "sample",
-									VolumeSource: v1.VolumeSource{
-										HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
-										EmptyDir: &v1.EmptyDirVolumeSource{
-											SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
-									},
-								},
-							}
-							// A Mirror Pod.
-							pod.Annotations = test.GetMirrorPodAnnotation()
-						}),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
-							// A Critical Pod.
-							pod.Namespace = "kube-system"
-							priority := utils.SystemCriticalPriority
-							pod.Spec.Priority = &priority
-						}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetDSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p5", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p8", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+			pods: []*v1.Pod{
+				// These won't be evicted.
+				test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+					// A pod with local storage.
+					test.SetNormalOwnerRef(pod)
+					pod.Spec.Volumes = []v1.Volume{
+						{
+							Name: "sample",
+							VolumeSource: v1.VolumeSource{
+								HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+								EmptyDir: &v1.EmptyDirVolumeSource{
+									SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+							},
+						},
+					}
+					// A Mirror Pod.
+					pod.Annotations = test.GetMirrorPodAnnotation()
+				}),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+					// A Critical Pod.
+					pod.Namespace = "kube-system"
+					priority := utils.SystemCriticalPriority
+					pod.Spec.Priority = &priority
+				}),
+				// These won't be evicted.
+				test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   0,
+			expectedPodsEvicted: 0,
 		},
 		{
 			name: "no node to schedule evicted pods",
@@ -156,34 +130,21 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  20,
 				v1.ResourcePods: 20,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						// These can't be evicted.
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						// These can't be evicted.
-						*test.BuildTestPod("p2", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p3", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+			pods: []*v1.Pod{
+				// These can't be evicted.
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				// These can't be evicted.
+				test.BuildTestPod("p2", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   0,
+			expectedPodsEvicted: 0,
 		},
 		{
 			name: "without priorities",
@@ -191,42 +152,29 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  30,
 				v1.ResourcePods: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						// These won't be evicted.
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
-							// A Critical Pod.
-							pod.Namespace = "kube-system"
-							priority := utils.SystemCriticalPriority
-							pod.Spec.Priority = &priority
-						}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				// These won't be evicted.
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+					// A Critical Pod.
+					pod.Namespace = "kube-system"
+					priority := utils.SystemCriticalPriority
+					pod.Spec.Priority = &priority
+				}),
+				// These won't be evicted.
+				test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   2,
-			evictedPods:           []string{"p1", "p7"},
+			expectedPodsEvicted: 2,
+			evictedPods:         []string{"p1", "p7"},
 		},
 		{
 			name: "without priorities stop when resource capacity is depleted",
@@ -234,117 +182,79 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  30,
 				v1.ResourcePods: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 2000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 2000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 2000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 2000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 2000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 2000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p2", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p6", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				// These won't be evicted.
+				test.BuildTestPod("p2", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   1,
+			expectedPodsEvicted: 1,
 		},
 		{
 			name: "with priorities",
 			thresholds: api.ResourceThresholds{
 				v1.ResourceCPU: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 2000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 2000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 2000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 2000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodPriority(pod, lowPriority)
-						}),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodPriority(pod, highPriority)
-						}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p7", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p8", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p9", 400, 0, n3NodeName, test.SetDSOwnerRef),
-					},
-				},
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodPriority(pod, lowPriority)
+				}),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodPriority(pod, highPriority)
+				}),
+				// These won't be evicted.
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				// These won't be evicted.
+				test.BuildTestPod("p9", 400, 0, n3NodeName, test.SetDSOwnerRef),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   1,
-			evictedPods:           []string{"p1"},
+			expectedPodsEvicted: 1,
+			evictedPods:         []string{"p1"},
 		},
 		{
 			name: "without priorities evicting best-effort pods only",
 			thresholds: api.ResourceThresholds{
 				v1.ResourceCPU: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 3000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 3000, 3000, 5, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 3000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 3000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 3000, 3000, 5, nil),
+				test.BuildTestNode(n3NodeName, 3000, 3000, 10, test.SetNodeUnschedulable),
 			},
 			// All pods are assumed to be burstable (test.BuildTestNode always sets both cpu/memory resource requests to some value)
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.MakeBestEffortPod(pod)
-						}),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-						}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						// These won't be evicted.
-						*test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{},
-				},
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.MakeBestEffortPod(pod)
+				}),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+				}),
+				// These won't be evicted.
+				test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   1,
-			evictedPods:           []string{"p1"},
+			expectedPodsEvicted: 1,
+			evictedPods:         []string{"p1"},
 		},
 		{
 			name: "with extended resource",
@@ -352,60 +262,44 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:   20,
 				extendedResource: 40,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 100, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-						*test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-						// These won't be evicted
-						*test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetDSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p3", 500, 0, n2NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-						*test.BuildTestPod("p4", 500, 0, n2NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-						*test.BuildTestPod("p5", 500, 0, n2NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-						*test.BuildTestPod("p6", 500, 0, n2NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{},
-				},
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 100, 0, n1NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
+				}),
+				test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
+				}),
+				// These won't be evicted
+				test.BuildTestPod("p3", 500, 0, n2NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
+				}),
+				test.BuildTestPod("p4", 500, 0, n2NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
+				}),
+				test.BuildTestPod("p5", 500, 0, n2NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
+				}),
+				test.BuildTestPod("p6", 500, 0, n2NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
+				}),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   2,
-			evictedPods:           []string{"p1", "p2"},
+			expectedPodsEvicted: 2,
+			evictedPods:         []string{"p1", "p2"},
 		},
 		{
 			name: "with extended resource in some of nodes",
@@ -413,41 +307,29 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:   40,
 				extendedResource: 40,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						//These won't be evicted
-						*test.BuildTestPod("p1", 100, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-						*test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetRSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p3", 500, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 500, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 500, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 500, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{},
-				},
+			pods: []*v1.Pod{
+				//These won't be evicted
+				test.BuildTestPod("p1", 100, 0, n1NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
+				}),
+				test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
+					test.SetRSOwnerRef(pod)
+					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
+				}),
+				test.BuildTestPod("p3", 500, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 500, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 500, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 500, 0, n2NodeName, test.SetRSOwnerRef),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   0,
+			expectedPodsEvicted: 0,
 		},
 		{
 			name: "Other node match pod node selector",
@@ -455,37 +337,28 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  30,
 				v1.ResourcePods: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, func(node *v1.Node) {
 					node.ObjectMeta.Labels = map[string]string{
 						nodeSelectorKey: nodeSelectorValue,
 					}
 				}),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, func(pod *v1.Pod) {
-							// A pod selecting nodes in the "west" datacenter
-							test.SetRSOwnerRef(pod)
-							pod.Spec.NodeSelector = map[string]string{
-								nodeSelectorKey: nodeSelectorValue,
-							}
-						}),
-					},
-				},
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, func(pod *v1.Pod) {
+					// A pod selecting nodes in the "west" datacenter
+					test.SetRSOwnerRef(pod)
+					pod.Spec.NodeSelector = map[string]string{
+						nodeSelectorKey: nodeSelectorValue,
+					}
+				}),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   1,
+			expectedPodsEvicted: 1,
 		},
 		{
 			name: "Other node does not match pod node selector",
@@ -493,67 +366,56 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  30,
 				v1.ResourcePods: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, func(pod *v1.Pod) {
-							// A pod selecting nodes in the "west" datacenter
-							test.SetRSOwnerRef(pod)
-							pod.Spec.NodeSelector = map[string]string{
-								nodeSelectorKey: nodeSelectorValue,
-							}
-						}),
-					},
-				},
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, func(pod *v1.Pod) {
+					// A pod selecting nodes in the "west" datacenter
+					test.SetRSOwnerRef(pod)
+					pod.Spec.NodeSelector = map[string]string{
+						nodeSelectorKey: nodeSelectorValue,
+					}
+				}),
 			},
-			maxPodsToEvictPerNode: 0,
-			expectedPodsEvicted:   0,
+			expectedPodsEvicted: 0,
 		},
 	}
 
-	for _, test := range testCases {
-		t.Run(test.name, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				list := action.(core.ListAction)
-				fieldString := list.GetListRestrictions().Fields.String()
-				if strings.Contains(fieldString, n1NodeName) {
-					return true, test.pods[n1NodeName], nil
-				}
-				if strings.Contains(fieldString, n2NodeName) {
-					return true, test.pods[n2NodeName], nil
-				}
-				if strings.Contains(fieldString, n3NodeName) {
-					return true, test.pods[n3NodeName], nil
-				}
-				return true, nil, fmt.Errorf("Failed to list: %v", list)
-			})
-			fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
-				getAction := action.(core.GetAction)
-				if node, exists := test.nodes[getAction.GetName()]; exists {
-					return true, node, nil
-				}
-				return true, nil, fmt.Errorf("Wrong node: %v", getAction.GetName())
-			})
+	for _, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range testCase.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range testCase.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
 			podsForEviction := make(map[string]struct{})
-			for _, pod := range test.evictedPods {
+			for _, pod := range testCase.evictedPods {
 				podsForEviction[pod] = struct{}{}
 			}
 
 			evictionFailed := false
-			if len(test.evictedPods) > 0 {
+			if len(testCase.evictedPods) > 0 {
 				fakeClient.Fake.AddReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
 					getAction := action.(core.CreateAction)
 					obj := getAction.GetObject()
@@ -568,17 +430,41 @@ func TestHighNodeUtilization(t *testing.T) {
 				})
 			}
 
-			var nodes []*v1.Node
-			for _, node := range test.nodes {
-				nodes = append(nodes, node)
-			}
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			//fakeClient := &fake.Clientset{}
+			//fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
+			//	list := action.(core.ListAction)
+			//	fieldString := list.GetListRestrictions().Fields.String()
+			//	if strings.Contains(fieldString, n1NodeName) {
+			//		return true, test.pods[n1NodeName], nil
+			//	}
+			//	if strings.Contains(fieldString, n2NodeName) {
+			//		return true, test.pods[n2NodeName], nil
+			//	}
+			//	if strings.Contains(fieldString, n3NodeName) {
+			//		return true, test.pods[n3NodeName], nil
+			//	}
+			//	return true, nil, fmt.Errorf("Failed to list: %v", list)
+			//})
+			//fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
+			//	getAction := action.(core.GetAction)
+			//	if node, exists := testCase.nodes[getAction.GetName()]; exists {
+			//		return true, node, nil
+			//	}
+			//	return true, nil, fmt.Errorf("Wrong node: %v", getAction.GetName())
+			//})
 
 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
 				"v1",
 				false,
-				test.maxPodsToEvictPerNode,
-				nodes,
+				nil,
+				nil,
+				testCase.nodes,
+				false,
+				false,
 				false,
 				false,
 				false,
@@ -588,16 +474,16 @@ func TestHighNodeUtilization(t *testing.T) {
 				Enabled: true,
 				Params: &api.StrategyParameters{
 					NodeResourceUtilizationThresholds: &api.NodeResourceUtilizationThresholds{
-						Thresholds: test.thresholds,
+						Thresholds: testCase.thresholds,
 					},
 					NodeFit: true,
 				},
 			}
-			HighNodeUtilization(ctx, fakeClient, strategy, nodes, podEvictor)
+			HighNodeUtilization(ctx, fakeClient, strategy, testCase.nodes, podEvictor, getPodsAssignedToNode)
 
 			podsEvicted := podEvictor.TotalEvicted()
-			if test.expectedPodsEvicted != podsEvicted {
-				t.Errorf("Expected %#v pods to be evicted but %#v got evicted", test.expectedPodsEvicted, podsEvicted)
+			if testCase.expectedPodsEvicted != podsEvicted {
+				t.Errorf("Expected %v pods to be evicted but %v got evicted", testCase.expectedPodsEvicted, podsEvicted)
 			}
 			if evictionFailed {
 				t.Errorf("Pod evictions failed unexpectedly")
@@ -674,7 +560,6 @@ func TestValidateHighNodeUtilizationStrategyConfig(t *testing.T) {
 }
 
 func TestHighNodeUtilizationWithTaints(t *testing.T) {
-	ctx := context.Background()
 	strategy := api.DeschedulerStrategy{
 		Enabled: true,
 		Params: &api.StrategyParameters{
@@ -710,7 +595,7 @@ func TestHighNodeUtilizationWithTaints(t *testing.T) {
 		name              string
 		nodes             []*v1.Node
 		pods              []*v1.Pod
-		evictionsExpected int
+		evictionsExpected uint
 	}{
 		{
 			name:  "No taints",
@@ -752,6 +637,9 @@ func TestHighNodeUtilizationWithTaints(t *testing.T) {
 
 	for _, item := range tests {
 		t.Run(item.name, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
 			var objs []runtime.Object
 			for _, node := range item.nodes {
 				objs = append(objs, node)
@@ -762,19 +650,32 @@ func TestHighNodeUtilizationWithTaints(t *testing.T) {
 			}
 
 			fakeClient := fake.NewSimpleClientset(objs...)
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
 
 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
 				"policy/v1",
 				false,
-				item.evictionsExpected,
+				&item.evictionsExpected,
+				nil,
 				item.nodes,
 				false,
 				false,
 				false,
+				false,
+				false,
 			)
 
-			HighNodeUtilization(ctx, fakeClient, strategy, item.nodes, podEvictor)
+			HighNodeUtilization(ctx, fakeClient, strategy, item.nodes, podEvictor, getPodsAssignedToNode)
 
 			if item.evictionsExpected != podEvictor.TotalEvicted() {
 				t.Errorf("Expected %v evictions, got %v", item.evictionsExpected, podEvictor.TotalEvicted())

pkg/descheduler/strategies/nodeutilization/lownodeutilization.go

@@ -19,6 +19,7 @@ package nodeutilization
 import (
 	"context"
 	"fmt"
+
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	clientset "k8s.io/client-go/kubernetes"
@@ -27,12 +28,13 @@ import (
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 )
 
 // LowNodeUtilization evicts pods from overutilized nodes to underutilized nodes. Note that CPU/Memory requests are used
 // to calculate nodes' utilization and not the actual resource usage.
-func LowNodeUtilization(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+func LowNodeUtilization(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
 	// TODO: May be create a struct for the strategy as well, so that we don't have to pass along the all the params?
 	if err := validateNodeUtilizationParams(strategy.Params); err != nil {
 		klog.ErrorS(err, "Invalid LowNodeUtilization parameters")
@@ -71,7 +73,7 @@ func LowNodeUtilization(ctx context.Context, client clientset.Interface, strateg
 	resourceNames := getResourceNames(thresholds)
 
 	lowNodes, sourceNodes := classifyNodes(
-		getNodeUsage(ctx, client, nodes, thresholds, targetThresholds, resourceNames),
+		getNodeUsage(nodes, thresholds, targetThresholds, resourceNames, getPodsAssignedToNode),
 		// The node has to be schedulable (to be able to move workload there)
 		func(node *v1.Node, usage NodeUsage) bool {
 			if nodeutil.IsNodeUnschedulable(node) {
@@ -118,8 +120,8 @@ func LowNodeUtilization(ctx context.Context, client clientset.Interface, strateg
 		return
 	}
 
-	if len(lowNodes) < strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes {
-		klog.V(1).InfoS("Number of nodes underutilized is less than NumberOfNodes, nothing to do here", "underutilizedNodes", len(lowNodes), "numberOfNodes", strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes)
+	if len(lowNodes) <= strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes {
+		klog.V(1).InfoS("Number of nodes underutilized is less or equal than NumberOfNodes, nothing to do here", "underutilizedNodes", len(lowNodes), "numberOfNodes", strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes)
 		return
 	}
 

pkg/descheduler/strategies/nodeutilization/nodeutilization.go

@@ -19,15 +19,16 @@ package nodeutilization
 import (
 	"context"
 	"fmt"
+	"sort"
+
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
-	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
-	"sort"
 )
 
 // NodeUsage stores a node's info, pods on it, thresholds and its resource usage
@@ -77,16 +78,15 @@ func validateThresholds(thresholds api.ResourceThresholds) error {
 }
 
 func getNodeUsage(
-	ctx context.Context,
-	client clientset.Interface,
 	nodes []*v1.Node,
 	lowThreshold, highThreshold api.ResourceThresholds,
 	resourceNames []v1.ResourceName,
+	getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc,
 ) []NodeUsage {
 	var nodeUsageList []NodeUsage
 
 	for _, node := range nodes {
-		pods, err := podutil.ListPodsOnANode(ctx, client, node)
+		pods, err := podutil.ListPodsOnANode(node.Name, getPodsAssignedToNode, nil)
 		if err != nil {
 			klog.V(2).InfoS("Node will not be processed, error accessing its pods", "node", klog.KObj(node), "err", err)
 			continue

pkg/descheduler/strategies/pod_antiaffinity.go

@@ -20,6 +20,7 @@ import (
 	"context"
 	"fmt"
 
+	"k8s.io/apimachinery/pkg/util/sets"
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
@@ -48,18 +49,18 @@ func validateRemovePodsViolatingInterPodAntiAffinityParams(params *api.StrategyP
 }
 
 // RemovePodsViolatingInterPodAntiAffinity evicts pods on the node which are having a pod affinity rules.
-func RemovePodsViolatingInterPodAntiAffinity(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+func RemovePodsViolatingInterPodAntiAffinity(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
 	if err := validateRemovePodsViolatingInterPodAntiAffinityParams(strategy.Params); err != nil {
 		klog.ErrorS(err, "Invalid RemovePodsViolatingInterPodAntiAffinity parameters")
 		return
 	}
 
-	var includedNamespaces, excludedNamespaces []string
+	var includedNamespaces, excludedNamespaces sets.String
 	var labelSelector *metav1.LabelSelector
 	if strategy.Params != nil {
 		if strategy.Params.Namespaces != nil {
-			includedNamespaces = strategy.Params.Namespaces.Include
-			excludedNamespaces = strategy.Params.Namespaces.Exclude
+			includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
+			excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
 		}
 		labelSelector = strategy.Params.LabelSelector
 	}
@@ -77,16 +78,19 @@ func RemovePodsViolatingInterPodAntiAffinity(ctx context.Context, client clients
 
 	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority), evictions.WithNodeFit(nodeFit))
 
+	podFilter, err := podutil.NewOptions().
+		WithNamespaces(includedNamespaces).
+		WithoutNamespaces(excludedNamespaces).
+		WithLabelSelector(labelSelector).
+		BuildFilterFunc()
+	if err != nil {
+		klog.ErrorS(err, "Error initializing pod filter function")
+		return
+	}
+
 	for _, node := range nodes {
 		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(
-			ctx,
-			client,
-			node,
-			podutil.WithNamespaces(includedNamespaces),
-			podutil.WithoutNamespaces(excludedNamespaces),
-			podutil.WithLabelSelector(labelSelector),
-		)
+		pods, err := podutil.ListPodsOnANode(node.Name, getPodsAssignedToNode, podFilter)
 		if err != nil {
 			return
 		}

pkg/descheduler/strategies/pod_antiaffinity_test.go

@@ -24,16 +24,17 @@ import (
 	policyv1 "k8s.io/api/policy/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )
 
 func TestPodAntiAffinity(t *testing.T) {
-	ctx := context.Background()
 	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
 	node2 := test.BuildTestNode("n2", 2000, 3000, 10, func(node *v1.Node) {
 		node.ObjectMeta.Labels = map[string]string{
@@ -55,6 +56,10 @@ func TestPodAntiAffinity(t *testing.T) {
 	p6 := test.BuildTestPod("p6", 100, 0, node1.Name, nil)
 	p7 := test.BuildTestPod("p7", 100, 0, node1.Name, nil)
 	p8 := test.BuildTestPod("p8", 100, 0, node1.Name, nil)
+	p9 := test.BuildTestPod("p9", 100, 0, node1.Name, nil)
+	p10 := test.BuildTestPod("p10", 100, 0, node1.Name, nil)
+	p9.DeletionTimestamp = &metav1.Time{}
+	p10.DeletionTimestamp = &metav1.Time{}
 
 	criticalPriority := utils.SystemCriticalPriority
 	nonEvictablePod := test.BuildTestPod("non-evict", 100, 0, node1.Name, func(pod *v1.Pod) {
@@ -72,6 +77,8 @@ func TestPodAntiAffinity(t *testing.T) {
 	test.SetNormalOwnerRef(p5)
 	test.SetNormalOwnerRef(p6)
 	test.SetNormalOwnerRef(p7)
+	test.SetNormalOwnerRef(p9)
+	test.SetNormalOwnerRef(p10)
 
 	// set pod anti affinity
 	setPodAntiAffinity(p1, "foo", "bar")
@@ -80,6 +87,8 @@ func TestPodAntiAffinity(t *testing.T) {
 	setPodAntiAffinity(p5, "foo1", "bar1")
 	setPodAntiAffinity(p6, "foo1", "bar1")
 	setPodAntiAffinity(p7, "foo", "bar")
+	setPodAntiAffinity(p9, "foo", "bar")
+	setPodAntiAffinity(p10, "foo", "bar")
 
 	// set pod priority
 	test.SetPodPriority(p5, 100)
@@ -91,98 +100,133 @@ func TestPodAntiAffinity(t *testing.T) {
 		"datacenter": "west",
 	}
 
+	var uint1 uint = 1
+	var uint3 uint = 3
+
 	tests := []struct {
-		description             string
-		maxPodsToEvictPerNode   int
-		pods                    []v1.Pod
-		expectedEvictedPodCount int
-		nodeFit                 bool
-		nodes                   []*v1.Node
+		description                    string
+		maxPodsToEvictPerNode          *uint
+		maxNoOfPodsToEvictPerNamespace *uint
+		pods                           []*v1.Pod
+		expectedEvictedPodCount        uint
+		nodeFit                        bool
+		nodes                          []*v1.Node
 	}{
 		{
 			description:             "Maximum pods to evict - 0",
-			maxPodsToEvictPerNode:   0,
-			pods:                    []v1.Pod{*p1, *p2, *p3, *p4},
+			pods:                    []*v1.Pod{p1, p2, p3, p4},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 3,
 		},
 		{
 			description:             "Maximum pods to evict - 3",
-			maxPodsToEvictPerNode:   3,
-			pods:                    []v1.Pod{*p1, *p2, *p3, *p4},
+			maxPodsToEvictPerNode:   &uint3,
+			pods:                    []*v1.Pod{p1, p2, p3, p4},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 3,
 		},
+		{
+			description:                    "Maximum pods to evict (maxPodsToEvictPerNamespace=3) - 3",
+			maxNoOfPodsToEvictPerNamespace: &uint3,
+			pods:                           []*v1.Pod{p1, p2, p3, p4},
+			nodes:                          []*v1.Node{node1},
+			expectedEvictedPodCount:        3,
+		},
 		{
 			description:             "Evict only 1 pod after sorting",
-			maxPodsToEvictPerNode:   0,
-			pods:                    []v1.Pod{*p5, *p6, *p7},
+			pods:                    []*v1.Pod{p5, p6, p7},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
 		{
 			description:             "Evicts pod that conflicts with critical pod (but does not evict critical pod)",
-			maxPodsToEvictPerNode:   1,
-			pods:                    []v1.Pod{*p1, *nonEvictablePod},
+			maxPodsToEvictPerNode:   &uint1,
+			pods:                    []*v1.Pod{p1, nonEvictablePod},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
 		{
 			description:             "Evicts pod that conflicts with critical pod (but does not evict critical pod)",
-			maxPodsToEvictPerNode:   1,
-			pods:                    []v1.Pod{*p1, *nonEvictablePod},
+			maxPodsToEvictPerNode:   &uint1,
+			pods:                    []*v1.Pod{p1, nonEvictablePod},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
 		{
 			description:             "Won't evict pods because node selectors don't match available nodes",
-			maxPodsToEvictPerNode:   1,
-			pods:                    []v1.Pod{*p8, *nonEvictablePod},
+			maxPodsToEvictPerNode:   &uint1,
+			pods:                    []*v1.Pod{p8, nonEvictablePod},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			nodeFit:                 true,
 		},
 		{
 			description:             "Won't evict pods because only other node is not schedulable",
-			maxPodsToEvictPerNode:   1,
-			pods:                    []v1.Pod{*p8, *nonEvictablePod},
+			maxPodsToEvictPerNode:   &uint1,
+			pods:                    []*v1.Pod{p8, nonEvictablePod},
 			nodes:                   []*v1.Node{node1, node3},
 			expectedEvictedPodCount: 0,
 			nodeFit:                 true,
 		},
+		{
+			description:             "No pod to evicted since all pod terminating",
+			pods:                    []*v1.Pod{p9, p10},
+			nodes:                   []*v1.Node{node1},
+			expectedEvictedPodCount: 0,
+		},
 	}
 
 	for _, test := range tests {
-		// create fake client
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: test.pods}, nil
-		})
-		fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
-			return true, node1, nil
-		})
+		t.Run(test.description, func(t *testing.T) {
 
-		podEvictor := evictions.NewPodEvictor(
-			fakeClient,
-			policyv1.SchemeGroupVersion.String(),
-			false,
-			test.maxPodsToEvictPerNode,
-			test.nodes,
-			false,
-			false,
-			false,
-		)
-		strategy := api.DeschedulerStrategy{
-			Params: &api.StrategyParameters{
-				NodeFit: test.nodeFit,
-			},
-		}
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
 
-		RemovePodsViolatingInterPodAntiAffinity(ctx, fakeClient, strategy, test.nodes, podEvictor)
-		podsEvicted := podEvictor.TotalEvicted()
-		if podsEvicted != test.expectedEvictedPodCount {
-			t.Errorf("Unexpected no of pods evicted: pods evicted: %d, expected: %d", podsEvicted, test.expectedEvictedPodCount)
-		}
+			var objs []runtime.Object
+			for _, node := range test.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range test.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				policyv1.SchemeGroupVersion.String(),
+				false,
+				test.maxPodsToEvictPerNode,
+				test.maxNoOfPodsToEvictPerNamespace,
+				test.nodes,
+				false,
+				false,
+				false,
+				false,
+				false,
+			)
+			strategy := api.DeschedulerStrategy{
+				Params: &api.StrategyParameters{
+					NodeFit: test.nodeFit,
+				},
+			}
+
+			RemovePodsViolatingInterPodAntiAffinity(ctx, fakeClient, strategy, test.nodes, podEvictor, getPodsAssignedToNode)
+			podsEvicted := podEvictor.TotalEvicted()
+			if podsEvicted != test.expectedEvictedPodCount {
+				t.Errorf("Unexpected no of pods evicted: pods evicted: %d, expected: %d", podsEvicted, test.expectedEvictedPodCount)
+			}
+		})
 	}
 }
 

pkg/descheduler/strategies/pod_lifetime.go

@@ -22,6 +22,7 @@ import (
 
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/sets"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
 
@@ -56,7 +57,7 @@ func validatePodLifeTimeParams(params *api.StrategyParameters) error {
 }
 
 // PodLifeTime evicts pods on nodes that were created more than strategy.Params.MaxPodLifeTimeSeconds seconds ago.
-func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
 	if err := validatePodLifeTimeParams(strategy.Params); err != nil {
 		klog.ErrorS(err, "Invalid PodLifeTime parameters")
 		return
@@ -68,10 +69,10 @@ func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.D
 		return
 	}
 
-	var includedNamespaces, excludedNamespaces []string
+	var includedNamespaces, excludedNamespaces sets.String
 	if strategy.Params.Namespaces != nil {
-		includedNamespaces = strategy.Params.Namespaces.Include
-		excludedNamespaces = strategy.Params.Namespaces.Exclude
+		includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
+		excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
 	}
 
 	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
@@ -88,10 +89,21 @@ func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.D
 		}
 	}
 
+	podFilter, err := podutil.NewOptions().
+		WithFilter(filter).
+		WithNamespaces(includedNamespaces).
+		WithoutNamespaces(excludedNamespaces).
+		WithLabelSelector(strategy.Params.LabelSelector).
+		BuildFilterFunc()
+	if err != nil {
+		klog.ErrorS(err, "Error initializing pod filter function")
+		return
+	}
+
 	for _, node := range nodes {
 		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
 
-		pods := listOldPodsOnNode(ctx, client, node, includedNamespaces, excludedNamespaces, strategy.Params.LabelSelector, *strategy.Params.PodLifeTime.MaxPodLifeTimeSeconds, filter)
+		pods := listOldPodsOnNode(node.Name, getPodsAssignedToNode, podFilter, *strategy.Params.PodLifeTime.MaxPodLifeTimeSeconds)
 		for _, pod := range pods {
 			success, err := podEvictor.EvictPod(ctx, pod, node, "PodLifeTime")
 			if success {
@@ -108,23 +120,12 @@ func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.D
 }
 
 func listOldPodsOnNode(
-	ctx context.Context,
-	client clientset.Interface,
-	node *v1.Node,
-	includedNamespaces, excludedNamespaces []string,
-	labelSelector *metav1.LabelSelector,
+	nodeName string,
+	getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc,
+	filter podutil.FilterFunc,
 	maxPodLifeTimeSeconds uint,
-	filter func(pod *v1.Pod) bool,
 ) []*v1.Pod {
-	pods, err := podutil.ListPodsOnANode(
-		ctx,
-		client,
-		node,
-		podutil.WithFilter(filter),
-		podutil.WithNamespaces(includedNamespaces),
-		podutil.WithoutNamespaces(excludedNamespaces),
-		podutil.WithLabelSelector(labelSelector),
-	)
+	pods, err := podutil.ListPodsOnANode(nodeName, getPodsAssignedToNode, filter)
 	if err != nil {
 		return nil
 	}

pkg/descheduler/strategies/pod_lifetime_test.go

@@ -25,15 +25,16 @@ import (
 	policyv1 "k8s.io/api/policy/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )
 
 func TestPodLifeTime(t *testing.T) {
-	ctx := context.Background()
 	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
 	olderPodCreationTime := metav1.NewTime(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC))
 	newerPodCreationTime := metav1.NewTime(time.Now())
@@ -125,14 +126,24 @@ func TestPodLifeTime(t *testing.T) {
 	p12.ObjectMeta.OwnerReferences = ownerRef1
 	p13.ObjectMeta.OwnerReferences = ownerRef1
 
+	p14 := test.BuildTestPod("p14", 100, 0, node1.Name, nil)
+	p15 := test.BuildTestPod("p15", 100, 0, node1.Name, nil)
+	p14.Namespace = "dev"
+	p15.Namespace = "dev"
+	p14.ObjectMeta.CreationTimestamp = olderPodCreationTime
+	p15.ObjectMeta.CreationTimestamp = olderPodCreationTime
+	p14.ObjectMeta.OwnerReferences = ownerRef1
+	p15.ObjectMeta.OwnerReferences = ownerRef1
+	p14.DeletionTimestamp = &metav1.Time{}
+	p15.DeletionTimestamp = &metav1.Time{}
+
 	var maxLifeTime uint = 600
 	testCases := []struct {
 		description             string
 		strategy                api.DeschedulerStrategy
-		maxPodsToEvictPerNode   int
-		pods                    []v1.Pod
+		pods                    []*v1.Pod
 		nodes                   []*v1.Node
-		expectedEvictedPodCount int
+		expectedEvictedPodCount uint
 		ignorePvcPods           bool
 	}{
 		{
@@ -143,8 +154,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p1, *p2},
+			pods:                    []*v1.Pod{p1, p2},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
@@ -156,8 +166,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p3, *p4},
+			pods:                    []*v1.Pod{p3, p4},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 		},
@@ -169,8 +178,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p5, *p6},
+			pods:                    []*v1.Pod{p5, p6},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
@@ -182,8 +190,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p7, *p8},
+			pods:                    []*v1.Pod{p7, p8},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 		},
@@ -198,8 +205,7 @@ func TestPodLifeTime(t *testing.T) {
 					},
 				},
 			},
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p9, *p10},
+			pods:                    []*v1.Pod{p9, p10},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
@@ -211,8 +217,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p11},
+			pods:                    []*v1.Pod{p11},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 			ignorePvcPods:           true,
@@ -225,13 +230,12 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p11},
+			pods:                    []*v1.Pod{p11},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
 		{
-			description: "Two old pods with different labels, 1 selected by labelSelector",
+			description: "No pod to evicted since all pod terminating",
 			strategy: api.DeschedulerStrategy{
 				Enabled: true,
 				Params: &api.StrategyParameters{
@@ -241,36 +245,71 @@ func TestPodLifeTime(t *testing.T) {
 					},
 				},
 			},
-			maxPodsToEvictPerNode:   5,
-			pods:                    []v1.Pod{*p12, *p13},
+			pods:                    []*v1.Pod{p12, p13},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
+		{
+			description: "No pod should be evicted since pod terminating",
+			strategy: api.DeschedulerStrategy{
+				Enabled: true,
+				Params: &api.StrategyParameters{
+					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
+					LabelSelector: &metav1.LabelSelector{
+						MatchLabels: map[string]string{"foo": "bar"},
+					},
+				},
+			},
+			pods:                    []*v1.Pod{p14, p15},
+			nodes:                   []*v1.Node{node1},
+			expectedEvictedPodCount: 0,
+		},
 	}
 
 	for _, tc := range testCases {
-		fakeClient := &fake.Clientset{}
+		t.Run(tc.description, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
 
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: tc.pods}, nil
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				policyv1.SchemeGroupVersion.String(),
+				false,
+				nil,
+				nil,
+				tc.nodes,
+				false,
+				false,
+				tc.ignorePvcPods,
+				false,
+				false,
+			)
+
+			PodLifeTime(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
+			podsEvicted := podEvictor.TotalEvicted()
+			if podsEvicted != tc.expectedEvictedPodCount {
+				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", tc.description, tc.expectedEvictedPodCount, podsEvicted)
+			}
 		})
-
-		podEvictor := evictions.NewPodEvictor(
-			fakeClient,
-			policyv1.SchemeGroupVersion.String(),
-			false,
-			tc.maxPodsToEvictPerNode,
-			tc.nodes,
-			false,
-			false,
-			tc.ignorePvcPods,
-		)
-
-		PodLifeTime(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
-		podsEvicted := podEvictor.TotalEvicted()
-		if podsEvicted != tc.expectedEvictedPodCount {
-			t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", tc.description, tc.expectedEvictedPodCount, podsEvicted)
-		}
 	}
-
 }

pkg/descheduler/strategies/toomanyrestarts.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 
 	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/util/sets"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
 
@@ -49,7 +50,7 @@ func validateRemovePodsHavingTooManyRestartsParams(params *api.StrategyParameter
 // RemovePodsHavingTooManyRestarts removes the pods that have too many restarts on node.
 // There are too many cases leading this issue: Volume mount failed, app error due to nodes' different settings.
 // As of now, this strategy won't evict daemonsets, mirror pods, critical pods and pods with local storages.
-func RemovePodsHavingTooManyRestarts(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+func RemovePodsHavingTooManyRestarts(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
 	if err := validateRemovePodsHavingTooManyRestartsParams(strategy.Params); err != nil {
 		klog.ErrorS(err, "Invalid RemovePodsHavingTooManyRestarts parameters")
 		return
@@ -61,10 +62,10 @@ func RemovePodsHavingTooManyRestarts(ctx context.Context, client clientset.Inter
 		return
 	}
 
-	var includedNamespaces, excludedNamespaces []string
+	var includedNamespaces, excludedNamespaces sets.String
 	if strategy.Params.Namespaces != nil {
-		includedNamespaces = strategy.Params.Namespaces.Include
-		excludedNamespaces = strategy.Params.Namespaces.Exclude
+		includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
+		excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
 	}
 
 	nodeFit := false
@@ -74,17 +75,20 @@ func RemovePodsHavingTooManyRestarts(ctx context.Context, client clientset.Inter
 
 	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority), evictions.WithNodeFit(nodeFit))
 
+	podFilter, err := podutil.NewOptions().
+		WithFilter(evictable.IsEvictable).
+		WithNamespaces(includedNamespaces).
+		WithoutNamespaces(excludedNamespaces).
+		WithLabelSelector(strategy.Params.LabelSelector).
+		BuildFilterFunc()
+	if err != nil {
+		klog.ErrorS(err, "Error initializing pod filter function")
+		return
+	}
+
 	for _, node := range nodes {
 		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(
-			ctx,
-			client,
-			node,
-			podutil.WithFilter(evictable.IsEvictable),
-			podutil.WithNamespaces(includedNamespaces),
-			podutil.WithoutNamespaces(excludedNamespaces),
-			podutil.WithLabelSelector(strategy.Params.LabelSelector),
-		)
+		pods, err := podutil.ListPodsOnANode(node.Name, getPodsAssignedToNode, podFilter)
 		if err != nil {
 			klog.ErrorS(err, "Error listing a nodes pods", "node", klog.KObj(node))
 			continue

pkg/descheduler/strategies/toomanyrestarts_test.go

@@ -18,23 +18,24 @@ package strategies
 
 import (
 	"context"
-	"testing"
-
 	"fmt"
+	"testing"
 
 	v1 "k8s.io/api/core/v1"
 	policyv1 "k8s.io/api/policy/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )
 
-func initPods(node *v1.Node) []v1.Pod {
-	pods := make([]v1.Pod, 0)
+func initPods(node *v1.Node) []*v1.Pod {
+	pods := make([]*v1.Pod, 0)
 
 	for i := int32(0); i <= 9; i++ {
 		pod := test.BuildTestPod(fmt.Sprintf("pod-%d", i), 100, 0, node.Name, nil)
@@ -56,7 +57,7 @@ func initPods(node *v1.Node) []v1.Pod {
 				},
 			},
 		}
-		pods = append(pods, *pod)
+		pods = append(pods, pod)
 	}
 
 	// The following 3 pods won't get evicted.
@@ -81,8 +82,6 @@ func initPods(node *v1.Node) []v1.Pod {
 }
 
 func TestRemovePodsHavingTooManyRestarts(t *testing.T) {
-	ctx := context.Background()
-
 	node1 := test.BuildTestNode("node1", 2000, 3000, 10, nil)
 	node2 := test.BuildTestNode("node2", 2000, 3000, 10, func(node *v1.Node) {
 		node.Spec.Taints = []v1.Taint{
@@ -114,115 +113,139 @@ func TestRemovePodsHavingTooManyRestarts(t *testing.T) {
 		}
 	}
 
+	var uint3 uint = 3
+
 	tests := []struct {
-		description             string
-		nodes                   []*v1.Node
-		strategy                api.DeschedulerStrategy
-		expectedEvictedPodCount int
-		maxPodsToEvictPerNode   int
+		description                    string
+		nodes                          []*v1.Node
+		strategy                       api.DeschedulerStrategy
+		expectedEvictedPodCount        uint
+		maxPodsToEvictPerNode          *uint
+		maxNoOfPodsToEvictPerNamespace *uint
 	}{
 		{
 			description:             "All pods have total restarts under threshold, no pod evictions",
 			strategy:                createStrategy(true, true, 10000, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Some pods have total restarts bigger than threshold",
 			strategy:                createStrategy(true, true, 1, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 6,
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Nine pods have total restarts equals threshold(includingInitContainers=true), 6 pod evictions",
 			strategy:                createStrategy(true, true, 1*25, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 6,
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Nine pods have total restarts equals threshold(includingInitContainers=false), 5 pod evictions",
 			strategy:                createStrategy(true, false, 1*25, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 5,
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(includingInitContainers=true), 6 pod evictions",
 			strategy:                createStrategy(true, true, 1*20, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 6,
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Nine pods have total restarts equals threshold(includingInitContainers=false), 6 pod evictions",
 			strategy:                createStrategy(true, false, 1*20, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 6,
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Five pods have total restarts bigger than threshold(includingInitContainers=true), but only 1 pod eviction",
 			strategy:                createStrategy(true, true, 5*25+1, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Five pods have total restarts bigger than threshold(includingInitContainers=false), but only 1 pod eviction",
 			strategy:                createStrategy(true, false, 5*20+1, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
-			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(maxPodsToEvictPerNode=3), 3 pod evictions",
 			strategy:                createStrategy(true, true, 1, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 3,
-			maxPodsToEvictPerNode:   3,
+			maxPodsToEvictPerNode:   &uint3,
+		},
+		{
+			description:                    "All pods have total restarts equals threshold(maxNoOfPodsToEvictPerNamespace=3), 3 pod evictions",
+			strategy:                       createStrategy(true, true, 1, false),
+			nodes:                          []*v1.Node{node1},
+			expectedEvictedPodCount:        3,
+			maxNoOfPodsToEvictPerNamespace: &uint3,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(maxPodsToEvictPerNode=3) but the only other node is tained, 0 pod evictions",
 			strategy:                createStrategy(true, true, 1, true),
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
-			maxPodsToEvictPerNode:   3,
+			maxPodsToEvictPerNode:   &uint3,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(maxPodsToEvictPerNode=3) but the only other node is not schedulable, 0 pod evictions",
 			strategy:                createStrategy(true, true, 1, true),
 			nodes:                   []*v1.Node{node1, node3},
 			expectedEvictedPodCount: 0,
-			maxPodsToEvictPerNode:   3,
+			maxPodsToEvictPerNode:   &uint3,
 		},
 	}
 
 	for _, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {
 
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: pods}, nil
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				policyv1.SchemeGroupVersion.String(),
+				false,
+				tc.maxPodsToEvictPerNode,
+				tc.maxNoOfPodsToEvictPerNamespace,
+				tc.nodes,
+				false,
+				false,
+				false,
+				false,
+				false,
+			)
+
+			RemovePodsHavingTooManyRestarts(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
+			actualEvictedPodCount := podEvictor.TotalEvicted()
+			if actualEvictedPodCount != tc.expectedEvictedPodCount {
+				t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
+			}
 		})
-
-		podEvictor := evictions.NewPodEvictor(
-			fakeClient,
-			policyv1.SchemeGroupVersion.String(),
-			false,
-			tc.maxPodsToEvictPerNode,
-			tc.nodes,
-			false,
-			false,
-			false,
-		)
-
-		RemovePodsHavingTooManyRestarts(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
-		actualEvictedPodCount := podEvictor.TotalEvicted()
-		if actualEvictedPodCount != tc.expectedEvictedPodCount {
-			t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
-		}
 	}
-
 }

pkg/descheduler/strategies/topologyspreadconstraint.go

@@ -22,17 +22,18 @@ import (
 	"math"
 	"sort"
 
-	utilerrors "k8s.io/apimachinery/pkg/util/errors"
-
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
-	"k8s.io/apimachinery/pkg/util/sets"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/descheduler/strategies/validation"
 	"sigs.k8s.io/descheduler/pkg/utils"
 )
 
@@ -47,70 +48,24 @@ type topology struct {
 	pods []*v1.Pod
 }
 
-// topologySpreadStrategyParams contains validated strategy parameters
-type topologySpreadStrategyParams struct {
-	thresholdPriority  int32
-	includedNamespaces sets.String
-	excludedNamespaces sets.String
-	labelSelector      labels.Selector
-	nodeFit            bool
-}
-
-// validateAndParseTopologySpreadParams will validate parameters to ensure that they do not contain invalid values.
-func validateAndParseTopologySpreadParams(ctx context.Context, client clientset.Interface, params *api.StrategyParameters) (*topologySpreadStrategyParams, error) {
-	var includedNamespaces, excludedNamespaces sets.String
-	if params == nil {
-		return &topologySpreadStrategyParams{includedNamespaces: includedNamespaces, excludedNamespaces: excludedNamespaces}, nil
-	}
-	// At most one of include/exclude can be set
-	if params.Namespaces != nil && len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
-		return nil, fmt.Errorf("only one of Include/Exclude namespaces can be set")
-	}
-	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
-		return nil, fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
-	}
-	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, params)
-	if err != nil {
-		return nil, fmt.Errorf("failed to get threshold priority from strategy's params: %+v", err)
-	}
-	if params.Namespaces != nil {
-		includedNamespaces = sets.NewString(params.Namespaces.Include...)
-		excludedNamespaces = sets.NewString(params.Namespaces.Exclude...)
-	}
-	var selector labels.Selector
-	if params.LabelSelector != nil {
-		selector, err = metav1.LabelSelectorAsSelector(params.LabelSelector)
-		if err != nil {
-			return nil, fmt.Errorf("failed to get label selectors from strategy's params: %+v", err)
-		}
-	}
-
-	return &topologySpreadStrategyParams{
-		thresholdPriority:  thresholdPriority,
-		includedNamespaces: includedNamespaces,
-		excludedNamespaces: excludedNamespaces,
-		labelSelector:      selector,
-		nodeFit:            params.NodeFit,
-	}, nil
-}
-
 func RemovePodsViolatingTopologySpreadConstraint(
 	ctx context.Context,
 	client clientset.Interface,
 	strategy api.DeschedulerStrategy,
 	nodes []*v1.Node,
 	podEvictor *evictions.PodEvictor,
+	getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc,
 ) {
-	strategyParams, err := validateAndParseTopologySpreadParams(ctx, client, strategy.Params)
+	strategyParams, err := validation.ValidateAndParseStrategyParams(ctx, client, strategy.Params)
 	if err != nil {
 		klog.ErrorS(err, "Invalid RemovePodsViolatingTopologySpreadConstraint parameters")
 		return
 	}
 
 	evictable := podEvictor.Evictable(
-		evictions.WithPriorityThreshold(strategyParams.thresholdPriority),
-		evictions.WithNodeFit(strategyParams.nodeFit),
-		evictions.WithLabelSelector(strategyParams.labelSelector),
+		evictions.WithPriorityThreshold(strategyParams.ThresholdPriority),
+		evictions.WithNodeFit(strategyParams.NodeFit),
+		evictions.WithLabelSelector(strategyParams.LabelSelector),
 	)
 
 	nodeMap := make(map[string]*v1.Node, len(nodes))
@@ -140,8 +95,8 @@ func RemovePodsViolatingTopologySpreadConstraint(
 	podsForEviction := make(map[*v1.Pod]struct{})
 	// 1. for each namespace...
 	for _, namespace := range namespaces.Items {
-		if (len(strategyParams.includedNamespaces) > 0 && !strategyParams.includedNamespaces.Has(namespace.Name)) ||
-			(len(strategyParams.excludedNamespaces) > 0 && strategyParams.excludedNamespaces.Has(namespace.Name)) {
+		if (len(strategyParams.IncludedNamespaces) > 0 && !strategyParams.IncludedNamespaces.Has(namespace.Name)) ||
+			(len(strategyParams.ExcludedNamespaces) > 0 && strategyParams.ExcludedNamespaces.Has(namespace.Name)) {
 			continue
 		}
 		namespacePods, err := client.CoreV1().Pods(namespace.Name).List(ctx, metav1.ListOptions{})
@@ -186,6 +141,10 @@ func RemovePodsViolatingTopologySpreadConstraint(
 			// (this loop is where we count the number of pods per topologyValue that match this constraint's selector)
 			var sumPods float64
 			for i := range namespacePods.Items {
+				// skip pods that are being deleted.
+				if utils.IsPodTerminating(&namespacePods.Items[i]) {
+					continue
+				}
 				// 4. if the pod matches this TopologySpreadConstraint LabelSelector
 				if !selector.Matches(labels.Set(namespacePods.Items[i].Labels)) {
 					continue
@@ -281,7 +240,7 @@ func balanceDomains(
 	j := len(sortedDomains) - 1
 	for i < j {
 		// if j has no more to give without falling below the ideal average, move to next aboveAvg
-		if float64(len(sortedDomains[j].pods)) < idealAvg {
+		if float64(len(sortedDomains[j].pods)) <= idealAvg {
 			j--
 		}
 

pkg/descheduler/strategies/topologyspreadconstraint_test.go

@@ -5,23 +5,23 @@ import (
 	"fmt"
 	"testing"
 
-	"sigs.k8s.io/descheduler/pkg/api"
-
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
+	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )
 
 func TestTopologySpreadConstraint(t *testing.T) {
-	ctx := context.Background()
 	testCases := []struct {
 		name                 string
 		pods                 []*v1.Pod
-		expectedEvictedCount int
+		expectedEvictedCount uint
 		nodes                []*v1.Node
 		strategy             api.DeschedulerStrategy
 		namespaces           []string
@@ -588,6 +588,62 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			strategy:             api.DeschedulerStrategy{Params: &api.StrategyParameters{IncludeSoftConstraints: true}},
 			namespaces:           []string{"ns1"},
 		},
+		{
+			name: "3 domains size [8 7 0], maxSkew=1, should move 5 to get [5 5 5]",
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneA" }),
+				test.BuildTestNode("n2", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneB" }),
+				test.BuildTestNode("n3", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneC" }),
+			},
+			pods: createTestPods([]testPodList{
+				{
+					count:       8,
+					node:        "n1",
+					labels:      map[string]string{"foo": "bar"},
+					constraints: getDefaultTopologyConstraints(1),
+				},
+				{
+					count:       7,
+					node:        "n2",
+					labels:      map[string]string{"foo": "bar"},
+					constraints: getDefaultTopologyConstraints(1),
+				},
+			}),
+			expectedEvictedCount: 5,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "3 domains size [5 5 5], maxSkew=1, should move 0 to retain [5 5 5]",
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneA" }),
+				test.BuildTestNode("n2", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneB" }),
+				test.BuildTestNode("n3", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneC" }),
+			},
+			pods: createTestPods([]testPodList{
+				{
+					count:       5,
+					node:        "n1",
+					labels:      map[string]string{"foo": "bar"},
+					constraints: getDefaultTopologyConstraints(1),
+				},
+				{
+					count:       5,
+					node:        "n2",
+					labels:      map[string]string{"foo": "bar"},
+					constraints: getDefaultTopologyConstraints(1),
+				},
+				{
+					count:       5,
+					node:        "n3",
+					labels:      map[string]string{"foo": "bar"},
+					constraints: getDefaultTopologyConstraints(1),
+				},
+			}),
+			expectedEvictedCount: 0,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
 		{
 			name: "2 domains, sizes [2,0], maxSkew=1, move 1 pod since pod tolerates the node with taint",
 			nodes: []*v1.Node{
@@ -776,33 +832,83 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			},
 			namespaces: []string{"ns1"},
 		},
+		{
+			name: "2 domains, sizes [4,2], maxSkew=1, 2 pods in termination; nothing should be moved",
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneA" }),
+				test.BuildTestNode("n2", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneB" }),
+			},
+			pods: createTestPods([]testPodList{
+				{
+					count:       2,
+					node:        "n1",
+					labels:      map[string]string{"foo": "bar"},
+					constraints: getDefaultTopologyConstraints(1),
+				},
+				{
+					count:             2,
+					node:              "n1",
+					labels:            map[string]string{"foo": "bar"},
+					constraints:       getDefaultTopologyConstraints(1),
+					deletionTimestamp: &metav1.Time{},
+				},
+				{
+					count:       2,
+					node:        "n2",
+					labels:      map[string]string{"foo": "bar"},
+					constraints: getDefaultTopologyConstraints(1),
+				},
+			}),
+			expectedEvictedCount: 0,
+			strategy: api.DeschedulerStrategy{
+				Params: &api.StrategyParameters{
+					LabelSelector: getLabelSelector("foo", []string{"bar"}, metav1.LabelSelectorOpIn),
+				},
+			},
+			namespaces: []string{"ns1"},
+		},
 	}
 
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				podList := make([]v1.Pod, 0, len(tc.pods))
-				for _, pod := range tc.pods {
-					podList = append(podList, *pod)
-				}
-				return true, &v1.PodList{Items: podList}, nil
-			})
-			fakeClient.Fake.AddReactor("list", "namespaces", func(action core.Action) (bool, runtime.Object, error) {
-				return true, &v1.NamespaceList{Items: []v1.Namespace{{ObjectMeta: metav1.ObjectMeta{Name: "ns1", Namespace: "ns1"}}}}, nil
-			})
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			objs = append(objs, &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "ns1"}})
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
 
 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
 				"v1",
 				false,
-				100,
+				nil,
+				nil,
 				tc.nodes,
 				false,
 				false,
 				false,
+				false,
+				false,
 			)
-			RemovePodsViolatingTopologySpreadConstraint(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
+			RemovePodsViolatingTopologySpreadConstraint(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
 			podsEvicted := podEvictor.TotalEvicted()
 			if podsEvicted != tc.expectedEvictedCount {
 				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", tc.name, tc.expectedEvictedCount, podsEvicted)
@@ -812,14 +918,15 @@ func TestTopologySpreadConstraint(t *testing.T) {
 }
 
 type testPodList struct {
-	count        int
-	node         string
-	labels       map[string]string
-	constraints  []v1.TopologySpreadConstraint
-	nodeSelector map[string]string
-	nodeAffinity *v1.Affinity
-	noOwners     bool
-	tolerations  []v1.Toleration
+	count             int
+	node              string
+	labels            map[string]string
+	constraints       []v1.TopologySpreadConstraint
+	nodeSelector      map[string]string
+	nodeAffinity      *v1.Affinity
+	noOwners          bool
+	tolerations       []v1.Toleration
+	deletionTimestamp *metav1.Time
 }
 
 func createTestPods(testPods []testPodList) []*v1.Pod {
@@ -840,6 +947,7 @@ func createTestPods(testPods []testPodList) []*v1.Pod {
 					p.Spec.NodeSelector = tp.nodeSelector
 					p.Spec.Affinity = tp.nodeAffinity
 					p.Spec.Tolerations = tp.tolerations
+					p.ObjectMeta.DeletionTimestamp = tp.deletionTimestamp
 				}))
 			podNum++
 		}

pkg/descheduler/strategies/validation/strategyparams.go

@@ -0,0 +1,71 @@
+package validation
+
+import (
+	"context"
+	"fmt"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/sets"
+	clientset "k8s.io/client-go/kubernetes"
+
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/utils"
+)
+
+// ValidatedStrategyParams contains validated common strategy parameters
+type ValidatedStrategyParams struct {
+	ThresholdPriority  int32
+	IncludedNamespaces sets.String
+	ExcludedNamespaces sets.String
+	LabelSelector      labels.Selector
+	NodeFit            bool
+}
+
+func DefaultValidatedStrategyParams() ValidatedStrategyParams {
+	return ValidatedStrategyParams{ThresholdPriority: utils.SystemCriticalPriority}
+}
+
+func ValidateAndParseStrategyParams(
+	ctx context.Context,
+	client clientset.Interface,
+	params *api.StrategyParameters,
+) (*ValidatedStrategyParams, error) {
+	if params == nil {
+		defaultValidatedStrategyParams := DefaultValidatedStrategyParams()
+		return &defaultValidatedStrategyParams, nil
+	}
+
+	// At most one of include/exclude can be set
+	var includedNamespaces, excludedNamespaces sets.String
+	if params.Namespaces != nil && len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return nil, fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return nil, fmt.Errorf("only one of ThresholdPriority and thresholdPriorityClassName can be set")
+	}
+
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, params)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get threshold priority from strategy's params: %+v", err)
+	}
+	if params.Namespaces != nil {
+		includedNamespaces = sets.NewString(params.Namespaces.Include...)
+		excludedNamespaces = sets.NewString(params.Namespaces.Exclude...)
+	}
+	var selector labels.Selector
+	if params.LabelSelector != nil {
+		selector, err = metav1.LabelSelectorAsSelector(params.LabelSelector)
+		if err != nil {
+			return nil, fmt.Errorf("failed to get label selectors from strategy's params: %+v", err)
+		}
+	}
+
+	return &ValidatedStrategyParams{
+		ThresholdPriority:  thresholdPriority,
+		IncludedNamespaces: includedNamespaces,
+		ExcludedNamespaces: excludedNamespaces,
+		LabelSelector:      selector,
+		NodeFit:            params.NodeFit,
+	}, nil
+}

pkg/descheduler/strategies/validation/strategyparams_test.go

@@ -0,0 +1,79 @@
+package validation
+
+import (
+	"context"
+	"testing"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes/fake"
+
+	"sigs.k8s.io/descheduler/pkg/api"
+)
+
+var (
+	thresholdPriority int32 = 1000
+)
+
+func TestValidStrategyParams(t *testing.T) {
+	ctx := context.Background()
+	fakeClient := &fake.Clientset{}
+	testCases := []struct {
+		name   string
+		params *api.StrategyParameters
+	}{
+		{name: "validate nil params", params: nil},
+		{name: "validate empty params", params: &api.StrategyParameters{}},
+		{name: "validate params with NodeFit", params: &api.StrategyParameters{NodeFit: true}},
+		{name: "validate params with ThresholdPriority", params: &api.StrategyParameters{ThresholdPriority: &thresholdPriority}},
+		{name: "validate params with priorityClassName", params: &api.StrategyParameters{ThresholdPriorityClassName: "high-priority"}},
+		{name: "validate params with excluded namespace", params: &api.StrategyParameters{Namespaces: &api.Namespaces{Exclude: []string{"excluded-ns"}}}},
+		{name: "validate params with included namespace", params: &api.StrategyParameters{Namespaces: &api.Namespaces{Include: []string{"include-ns"}}}},
+		{name: "validate params with empty label selector", params: &api.StrategyParameters{LabelSelector: &metav1.LabelSelector{}}},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			params, err := ValidateAndParseStrategyParams(ctx, fakeClient, tc.params)
+			if err != nil {
+				t.Errorf("strategy params should be valid but got err: %v", err.Error())
+			}
+			if params == nil {
+				t.Errorf("strategy params should return a strategyParams but got nil")
+			}
+		})
+	}
+}
+
+func TestInvalidStrategyParams(t *testing.T) {
+	ctx := context.Background()
+	fakeClient := &fake.Clientset{}
+	testCases := []struct {
+		name   string
+		params *api.StrategyParameters
+	}{
+		{
+			name:   "invalid params with both included and excluded namespaces nil params",
+			params: &api.StrategyParameters{Namespaces: &api.Namespaces{Include: []string{"include-ns"}, Exclude: []string{"exclude-ns"}}},
+		},
+		{
+			name:   "invalid params with both threshold priority and priority class name",
+			params: &api.StrategyParameters{ThresholdPriorityClassName: "high-priority", ThresholdPriority: &thresholdPriority},
+		},
+		{
+			name:   "invalid params with bad label selector",
+			params: &api.StrategyParameters{LabelSelector: &metav1.LabelSelector{MatchLabels: map[string]string{"": "missing-label"}}},
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			params, err := ValidateAndParseStrategyParams(ctx, fakeClient, tc.params)
+			if err == nil {
+				t.Errorf("strategy params should be invalid but did not get err")
+			}
+			if params != nil {
+				t.Errorf("strategy params should return a nil strategyParams but got %v", params)
+			}
+		})
+	}
+}

pkg/utils/pod.go

@@ -89,6 +89,11 @@ func IsMirrorPod(pod *v1.Pod) bool {
 	return ok
 }
 
+// IsPodTerminating returns true if the pod DeletionTimestamp is set.
+func IsPodTerminating(pod *v1.Pod) bool {
+	return pod.DeletionTimestamp != nil
+}
+
 // IsStaticPod returns true if the pod is a static pod.
 func IsStaticPod(pod *v1.Pod) bool {
 	source, err := GetPodSource(pod)

test/e2e/e2e_duplicatepods_test.go

@@ -0,0 +1,203 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package e2e
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	appsv1 "k8s.io/api/apps/v1"
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/wait"
+	clientset "k8s.io/client-go/kubernetes"
+
+	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
+	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
+)
+
+func TestRemoveDuplicates(t *testing.T) {
+	ctx := context.Background()
+
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
+	defer close(stopCh)
+
+	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
+	if err != nil {
+		t.Errorf("Error listing node with %v", err)
+	}
+
+	nodes, workerNodes := splitNodesAndWorkerNodes(nodeList.Items)
+
+	t.Log("Creating testing namespace")
+	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
+	if _, err := clientSet.CoreV1().Namespaces().Create(ctx, testNamespace, metav1.CreateOptions{}); err != nil {
+		t.Fatalf("Unable to create ns %v", testNamespace.Name)
+	}
+	defer clientSet.CoreV1().Namespaces().Delete(ctx, testNamespace.Name, metav1.DeleteOptions{})
+
+	t.Log("Creating duplicates pods")
+
+	deploymentObj := &appsv1.Deployment{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "duplicate-pod",
+			Namespace: testNamespace.Name,
+			Labels:    map[string]string{"app": "test-duplicate", "name": "test-duplicatePods"},
+		},
+		Spec: appsv1.DeploymentSpec{
+			Selector: &metav1.LabelSelector{
+				MatchLabels: map[string]string{"app": "test-duplicate", "name": "test-duplicatePods"},
+			},
+			Template: v1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{"app": "test-duplicate", "name": "test-duplicatePods"},
+				},
+				Spec: v1.PodSpec{
+					Containers: []v1.Container{{
+						Name:            "pause",
+						ImagePullPolicy: "Always",
+						Image:           "kubernetes/pause",
+						Ports:           []v1.ContainerPort{{ContainerPort: 80}},
+					}},
+				},
+			},
+		},
+	}
+
+	tests := []struct {
+		description             string
+		replicasNum             int
+		beforeFunc              func(deployment *appsv1.Deployment)
+		expectedEvictedPodCount uint
+	}{
+		{
+			description: "Evict Pod even Pods schedule to specific node",
+			replicasNum: 4,
+			beforeFunc: func(deployment *appsv1.Deployment) {
+				deployment.Spec.Replicas = func(i int32) *int32 { return &i }(4)
+				deployment.Spec.Template.Spec.NodeName = workerNodes[0].Name
+			},
+			expectedEvictedPodCount: 2,
+		},
+		{
+			description: "Evict Pod even Pods with local storage",
+			replicasNum: 5,
+			beforeFunc: func(deployment *appsv1.Deployment) {
+				deployment.Spec.Replicas = func(i int32) *int32 { return &i }(5)
+				deployment.Spec.Template.Spec.Volumes = []v1.Volume{
+					{
+						Name: "sample",
+						VolumeSource: v1.VolumeSource{
+							EmptyDir: &v1.EmptyDirVolumeSource{
+								SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+						},
+					},
+				}
+			},
+			expectedEvictedPodCount: 2,
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {
+			t.Logf("Creating deployment %v in %v namespace", deploymentObj.Name, deploymentObj.Namespace)
+			tc.beforeFunc(deploymentObj)
+
+			_, err = clientSet.AppsV1().Deployments(deploymentObj.Namespace).Create(ctx, deploymentObj, metav1.CreateOptions{})
+			if err != nil {
+				t.Logf("Error creating deployment: %v", err)
+				if err = clientSet.AppsV1().Deployments(deploymentObj.Namespace).DeleteCollection(ctx, metav1.DeleteOptions{}, metav1.ListOptions{
+					LabelSelector: labels.SelectorFromSet(labels.Set(map[string]string{"app": "test-duplicate", "name": "test-duplicatePods"})).String(),
+				}); err != nil {
+					t.Fatalf("Unable to delete deployment: %v", err)
+				}
+				return
+			}
+			defer clientSet.AppsV1().Deployments(deploymentObj.Namespace).Delete(ctx, deploymentObj.Name, metav1.DeleteOptions{})
+			waitForPodsRunning(ctx, t, clientSet, map[string]string{"app": "test-duplicate", "name": "test-duplicatePods"}, tc.replicasNum, testNamespace.Name)
+
+			// Run DeschedulerStrategy strategy
+			evictionPolicyGroupVersion, err := eutils.SupportEviction(clientSet)
+			if err != nil || len(evictionPolicyGroupVersion) == 0 {
+				t.Fatalf("Error creating eviction policy group %v", err)
+			}
+			podEvictor := evictions.NewPodEvictor(
+				clientSet,
+				evictionPolicyGroupVersion,
+				false,
+				nil,
+				nil,
+				nodes,
+				true,
+				false,
+				false,
+				false,
+				false,
+			)
+
+			t.Log("Running DeschedulerStrategy strategy")
+			strategies.RemoveDuplicatePods(
+				ctx,
+				clientSet,
+				deschedulerapi.DeschedulerStrategy{
+					Enabled: true,
+					Params: &deschedulerapi.StrategyParameters{
+						RemoveDuplicates: &deschedulerapi.RemoveDuplicates{},
+					},
+				},
+				workerNodes,
+				podEvictor,
+				getPodsAssignedToNode,
+			)
+
+			waitForTerminatingPodsToDisappear(ctx, t, clientSet, testNamespace.Name)
+			actualEvictedPodCount := podEvictor.TotalEvicted()
+			if actualEvictedPodCount != tc.expectedEvictedPodCount {
+				t.Errorf("Test error for description: %s. Unexpected number of pods have been evicted, got %v, expected %v", tc.description, actualEvictedPodCount, tc.expectedEvictedPodCount)
+			}
+		})
+	}
+}
+
+func waitForPodsRunning(ctx context.Context, t *testing.T, clientSet clientset.Interface, labelMap map[string]string, desireRunningPodNum int, namespace string) {
+	if err := wait.PollImmediate(10*time.Second, 60*time.Second, func() (bool, error) {
+		podList, err := clientSet.CoreV1().Pods(namespace).List(ctx, metav1.ListOptions{
+			LabelSelector: labels.SelectorFromSet(labelMap).String(),
+		})
+		if err != nil {
+			return false, err
+		}
+		if len(podList.Items) != desireRunningPodNum {
+			t.Logf("Waiting for %v pods to be running, got %v instead", desireRunningPodNum, len(podList.Items))
+			return false, nil
+		}
+		for _, pod := range podList.Items {
+			if pod.Status.Phase != v1.PodRunning {
+				t.Logf("Pod %v not running yet, is %v instead", pod.Name, pod.Status.Phase)
+				return false, nil
+			}
+		}
+		return true, nil
+	}); err != nil {
+		t.Fatalf("Error waiting for pods running: %v", err)
+	}
+}

test/e2e/e2e_failedpods_test.go

@@ -0,0 +1,156 @@
+package e2e
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	batchv1 "k8s.io/api/batch/v1"
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/wait"
+	clientset "k8s.io/client-go/kubernetes"
+
+	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
+)
+
+var oneHourPodLifetimeSeconds uint = 3600
+
+func TestFailedPods(t *testing.T) {
+	ctx := context.Background()
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
+	defer close(stopCh)
+	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
+	if err != nil {
+		t.Errorf("Error listing node with %v", err)
+	}
+	nodes, _ := splitNodesAndWorkerNodes(nodeList.Items)
+	t.Log("Creating testing namespace")
+	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
+	if _, err := clientSet.CoreV1().Namespaces().Create(ctx, testNamespace, metav1.CreateOptions{}); err != nil {
+		t.Fatalf("Unable to create ns %v", testNamespace.Name)
+	}
+	defer clientSet.CoreV1().Namespaces().Delete(ctx, testNamespace.Name, metav1.DeleteOptions{})
+	testCases := map[string]struct {
+		expectedEvictedCount uint
+		strategyParams       *deschedulerapi.StrategyParameters
+	}{
+		"test-failed-pods-nil-strategy": {
+			expectedEvictedCount: 1,
+			strategyParams:       nil,
+		},
+		"test-failed-pods-default-strategy": {
+			expectedEvictedCount: 1,
+			strategyParams:       &deschedulerapi.StrategyParameters{},
+		},
+		"test-failed-pods-default-failed-pods": {
+			expectedEvictedCount: 1,
+			strategyParams: &deschedulerapi.StrategyParameters{
+				FailedPods: &deschedulerapi.FailedPods{},
+			},
+		},
+		"test-failed-pods-reason-unmatched": {
+			expectedEvictedCount: 0,
+			strategyParams: &deschedulerapi.StrategyParameters{
+				FailedPods: &deschedulerapi.FailedPods{Reasons: []string{"ReasonDoesNotMatch"}},
+			},
+		},
+		"test-failed-pods-min-age-unmet": {
+			expectedEvictedCount: 0,
+			strategyParams: &deschedulerapi.StrategyParameters{
+				FailedPods: &deschedulerapi.FailedPods{MinPodLifetimeSeconds: &oneHourPodLifetimeSeconds},
+			},
+		},
+		"test-failed-pods-exclude-job-kind": {
+			expectedEvictedCount: 0,
+			strategyParams: &deschedulerapi.StrategyParameters{
+				FailedPods: &deschedulerapi.FailedPods{ExcludeOwnerKinds: []string{"Job"}},
+			},
+		},
+	}
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			job := initFailedJob(name, testNamespace.Namespace)
+			t.Logf("Creating job %s in %s namespace", job.Name, job.Namespace)
+			jobClient := clientSet.BatchV1().Jobs(testNamespace.Name)
+			if _, err := jobClient.Create(ctx, job, metav1.CreateOptions{}); err != nil {
+				t.Fatalf("Error creating Job %s: %v", name, err)
+			}
+			deletePropagationPolicy := metav1.DeletePropagationForeground
+			defer jobClient.Delete(ctx, job.Name, metav1.DeleteOptions{PropagationPolicy: &deletePropagationPolicy})
+			waitForJobPodPhase(ctx, t, clientSet, job, v1.PodFailed)
+
+			podEvictor := initPodEvictorOrFail(t, clientSet, nodes)
+
+			t.Logf("Running RemoveFailedPods strategy for %s", name)
+			strategies.RemoveFailedPods(
+				ctx,
+				clientSet,
+				deschedulerapi.DeschedulerStrategy{
+					Enabled: true,
+					Params:  tc.strategyParams,
+				},
+				nodes,
+				podEvictor,
+				getPodsAssignedToNode,
+			)
+			t.Logf("Finished RemoveFailedPods strategy for %s", name)
+
+			if actualEvictedCount := podEvictor.TotalEvicted(); actualEvictedCount == tc.expectedEvictedCount {
+				t.Logf("Total of %d Pods were evicted for %s", actualEvictedCount, name)
+			} else {
+				t.Errorf("Unexpected number of pods have been evicted, got %v, expected %v", actualEvictedCount, tc.expectedEvictedCount)
+			}
+		})
+	}
+}
+
+func initFailedJob(name, namespace string) *batchv1.Job {
+	podSpec := MakePodSpec("", nil)
+	podSpec.Containers[0].Command = []string{"/bin/false"}
+	podSpec.RestartPolicy = v1.RestartPolicyNever
+	labelsSet := labels.Set{"test": name, "name": name}
+	jobBackoffLimit := int32(0)
+	return &batchv1.Job{
+		ObjectMeta: metav1.ObjectMeta{
+			Labels:    labelsSet,
+			Name:      name,
+			Namespace: namespace,
+		},
+		Spec: batchv1.JobSpec{
+			Template: v1.PodTemplateSpec{
+				Spec:       podSpec,
+				ObjectMeta: metav1.ObjectMeta{Labels: labelsSet},
+			},
+			BackoffLimit: &jobBackoffLimit,
+		},
+	}
+}
+
+func waitForJobPodPhase(ctx context.Context, t *testing.T, clientSet clientset.Interface, job *batchv1.Job, phase v1.PodPhase) {
+	podClient := clientSet.CoreV1().Pods(job.Namespace)
+	if err := wait.PollImmediate(5*time.Second, 30*time.Second, func() (bool, error) {
+		t.Log(labels.FormatLabels(job.Labels))
+		if podList, err := podClient.List(ctx, metav1.ListOptions{LabelSelector: labels.FormatLabels(job.Labels)}); err != nil {
+			return false, err
+		} else {
+			if len(podList.Items) == 0 {
+				t.Logf("Job controller has not created Pod for job %s yet", job.Name)
+				return false, nil
+			}
+			for _, pod := range podList.Items {
+				if pod.Status.Phase != phase {
+					t.Logf("Pod %v not in %s phase yet, is %v instead", pod.Name, phase, pod.Status.Phase)
+					return false, nil
+				}
+			}
+			t.Logf("Job %v Pod is in %s phase now", job.Name, phase)
+			return true, nil
+		}
+	}); err != nil {
+		t.Fatalf("Error waiting for pods in %s phase: %v", phase, err)
+	}
+}

test/e2e/e2e_test.go

@@ -62,11 +62,11 @@ func MakePodSpec(priorityClassName string, gracePeriod *int64) v1.PodSpec {
 			Resources: v1.ResourceRequirements{
 				Limits: v1.ResourceList{
 					v1.ResourceCPU:    resource.MustParse("100m"),
-					v1.ResourceMemory: resource.MustParse("1000Mi"),
+					v1.ResourceMemory: resource.MustParse("200Mi"),
 				},
 				Requests: v1.ResourceList{
 					v1.ResourceCPU:    resource.MustParse("100m"),
-					v1.ResourceMemory: resource.MustParse("800Mi"),
+					v1.ResourceMemory: resource.MustParse("100Mi"),
 				},
 			},
 		}},
@@ -75,7 +75,7 @@ func MakePodSpec(priorityClassName string, gracePeriod *int64) v1.PodSpec {
 	}
 }
 
-// RcByNameContainer returns a ReplicationControoler with specified name and container
+// RcByNameContainer returns a ReplicationController with specified name and container
 func RcByNameContainer(name, namespace string, replicas int32, labels map[string]string, gracePeriod *int64, priorityClassName string) *v1.ReplicationController {
 	zeroGracePeriod := int64(0)
 
@@ -108,7 +108,7 @@ func RcByNameContainer(name, namespace string, replicas int32, labels map[string
 	}
 }
 
-func initializeClient(t *testing.T) (clientset.Interface, coreinformers.NodeInformer, chan struct{}) {
+func initializeClient(t *testing.T) (clientset.Interface, coreinformers.NodeInformer, podutil.GetPodsAssignedToNodeFunc, chan struct{}) {
 	clientSet, err := client.CreateClient(os.Getenv("KUBECONFIG"))
 	if err != nil {
 		t.Errorf("Error during client creation with %v", err)
@@ -117,12 +117,41 @@ func initializeClient(t *testing.T) (clientset.Interface, coreinformers.NodeInfo
 	stopChannel := make(chan struct{})
 
 	sharedInformerFactory := informers.NewSharedInformerFactory(clientSet, 0)
+	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
+	podInformer := sharedInformerFactory.Core().V1().Pods()
+
+	getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+	if err != nil {
+		t.Errorf("build get pods assigned to node function error: %v", err)
+	}
+
 	sharedInformerFactory.Start(stopChannel)
 	sharedInformerFactory.WaitForCacheSync(stopChannel)
 
-	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
+	waitForNodesReady(context.Background(), t, clientSet, nodeInformer)
+	return clientSet, nodeInformer, getPodsAssignedToNode, stopChannel
+}
 
-	return clientSet, nodeInformer, stopChannel
+func waitForNodesReady(ctx context.Context, t *testing.T, clientSet clientset.Interface, nodeInformer coreinformers.NodeInformer) {
+	if err := wait.PollImmediate(5*time.Second, 30*time.Second, func() (bool, error) {
+		nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
+		if err != nil {
+			return false, err
+		}
+
+		readyNodes, err := nodeutil.ReadyNodes(ctx, clientSet, nodeInformer, "")
+		if err != nil {
+			return false, err
+		}
+		if len(nodeList.Items) != len(readyNodes) {
+			t.Logf("%v/%v nodes are ready. Waiting for all nodes to be ready...", len(readyNodes), len(nodeList.Items))
+			return false, nil
+		}
+
+		return true, nil
+	}); err != nil {
+		t.Fatalf("Error waiting for nodes to be ready: %v", err)
+	}
 }
 
 func runPodLifetimeStrategy(
@@ -135,6 +164,7 @@ func runPodLifetimeStrategy(
 	priority *int32,
 	evictCritical bool,
 	labelSelector *metav1.LabelSelector,
+	getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc,
 ) {
 	// Run descheduler.
 	evictionPolicyGroupVersion, err := eutils.SupportEviction(clientset)
@@ -166,12 +196,16 @@ func runPodLifetimeStrategy(
 			clientset,
 			evictionPolicyGroupVersion,
 			false,
-			0,
+			nil,
+			nil,
 			nodes,
 			false,
 			evictCritical,
 			false,
+			false,
+			false,
 		),
+		getPodsAssignedToNode,
 	)
 }
 
@@ -201,7 +235,7 @@ func intersectStrings(lista, listb []string) []string {
 func TestLowNodeUtilization(t *testing.T) {
 	ctx := context.Background()
 
-	clientSet, _, stopCh := initializeClient(t)
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 
 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
@@ -209,15 +243,7 @@ func TestLowNodeUtilization(t *testing.T) {
 		t.Errorf("Error listing node with %v", err)
 	}
 
-	var nodes []*v1.Node
-	var workerNodes []*v1.Node
-	for i := range nodeList.Items {
-		node := nodeList.Items[i]
-		nodes = append(nodes, &node)
-		if _, exists := node.Labels["node-role.kubernetes.io/master"]; !exists {
-			workerNodes = append(workerNodes, &node)
-		}
-	}
+	nodes, workerNodes := splitNodesAndWorkerNodes(nodeList.Items)
 
 	t.Log("Creating testing namespace")
 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -298,22 +324,14 @@ func TestLowNodeUtilization(t *testing.T) {
 	waitForRCPodsRunning(ctx, t, clientSet, rc)
 
 	// Run LowNodeUtilization strategy
-	evictionPolicyGroupVersion, err := eutils.SupportEviction(clientSet)
-	if err != nil || len(evictionPolicyGroupVersion) == 0 {
-		t.Fatalf("%v", err)
-	}
-	podEvictor := evictions.NewPodEvictor(
-		clientSet,
-		evictionPolicyGroupVersion,
-		false,
-		0,
-		nodes,
-		true,
-		false,
-		false,
-	)
+	podEvictor := initPodEvictorOrFail(t, clientSet, nodes)
 
-	podsOnMosttUtilizedNode, err := podutil.ListPodsOnANode(ctx, clientSet, workerNodes[0], podutil.WithFilter(podEvictor.Evictable().IsEvictable))
+	podFilter, err := podutil.NewOptions().WithFilter(podEvictor.Evictable().IsEvictable).BuildFilterFunc()
+	if err != nil {
+		t.Errorf("Error initializing pod filter function, %v", err)
+	}
+
+	podsOnMosttUtilizedNode, err := podutil.ListPodsOnANode(workerNodes[0].Name, getPodsAssignedToNode, podFilter)
 	if err != nil {
 		t.Errorf("Error listing pods on a node %v", err)
 	}
@@ -338,11 +356,17 @@ func TestLowNodeUtilization(t *testing.T) {
 		},
 		workerNodes,
 		podEvictor,
+		getPodsAssignedToNode,
 	)
 
 	waitForTerminatingPodsToDisappear(ctx, t, clientSet, rc.Namespace)
 
-	podsOnMosttUtilizedNode, err = podutil.ListPodsOnANode(ctx, clientSet, workerNodes[0], podutil.WithFilter(podEvictor.Evictable().IsEvictable))
+	podFilter, err = podutil.NewOptions().WithFilter(podEvictor.Evictable().IsEvictable).BuildFilterFunc()
+	if err != nil {
+		t.Errorf("Error initializing pod filter function, %v", err)
+	}
+
+	podsOnMosttUtilizedNode, err = podutil.ListPodsOnANode(workerNodes[0].Name, getPodsAssignedToNode, podFilter)
 	if err != nil {
 		t.Errorf("Error listing pods on a node %v", err)
 	}
@@ -359,7 +383,7 @@ func TestLowNodeUtilization(t *testing.T) {
 func TestNamespaceConstraintsInclude(t *testing.T) {
 	ctx := context.Background()
 
-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 
 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -394,7 +418,7 @@ func TestNamespaceConstraintsInclude(t *testing.T) {
 	t.Logf("set the strategy to delete pods from %v namespace", rc.Namespace)
 	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, &deschedulerapi.Namespaces{
 		Include: []string{rc.Namespace},
-	}, "", nil, false, nil)
+	}, "", nil, false, nil, getPodsAssignedToNode)
 
 	// All pods are supposed to be deleted, wait until all the old pods are deleted
 	if err := wait.PollImmediate(time.Second, 20*time.Second, func() (bool, error) {
@@ -430,7 +454,7 @@ func TestNamespaceConstraintsInclude(t *testing.T) {
 func TestNamespaceConstraintsExclude(t *testing.T) {
 	ctx := context.Background()
 
-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 
 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -465,7 +489,7 @@ func TestNamespaceConstraintsExclude(t *testing.T) {
 	t.Logf("set the strategy to delete pods from namespaces except the %v namespace", rc.Namespace)
 	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, &deschedulerapi.Namespaces{
 		Exclude: []string{rc.Namespace},
-	}, "", nil, false, nil)
+	}, "", nil, false, nil, getPodsAssignedToNode)
 
 	t.Logf("Waiting 10s")
 	time.Sleep(10 * time.Second)
@@ -497,7 +521,7 @@ func testEvictSystemCritical(t *testing.T, isPriorityClass bool) {
 	var lowPriority = int32(500)
 	ctx := context.Background()
 
-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 
 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -578,9 +602,9 @@ func testEvictSystemCritical(t *testing.T, isPriorityClass bool) {
 	t.Logf("Existing pods: %v", initialPodNames)
 
 	if isPriorityClass {
-		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, highPriorityClass.Name, nil, true, nil)
+		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, highPriorityClass.Name, nil, true, nil, getPodsAssignedToNode)
 	} else {
-		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", &highPriority, true, nil)
+		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", &highPriority, true, nil, getPodsAssignedToNode)
 	}
 
 	// All pods are supposed to be deleted, wait until all pods in the test namespace are terminating
@@ -627,7 +651,7 @@ func testPriority(t *testing.T, isPriorityClass bool) {
 	var lowPriority = int32(500)
 	ctx := context.Background()
 
-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 
 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -697,10 +721,10 @@ func testPriority(t *testing.T, isPriorityClass bool) {
 
 	if isPriorityClass {
 		t.Logf("set the strategy to delete pods with priority lower than priority class %s", highPriorityClass.Name)
-		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, highPriorityClass.Name, nil, false, nil)
+		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, highPriorityClass.Name, nil, false, nil, getPodsAssignedToNode)
 	} else {
 		t.Logf("set the strategy to delete pods with priority lower than %d", highPriority)
-		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", &highPriority, false, nil)
+		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", &highPriority, false, nil, getPodsAssignedToNode)
 	}
 
 	t.Logf("Waiting 10s")
@@ -756,7 +780,7 @@ func testPriority(t *testing.T, isPriorityClass bool) {
 func TestPodLabelSelector(t *testing.T) {
 	ctx := context.Background()
 
-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 
 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -804,7 +828,7 @@ func TestPodLabelSelector(t *testing.T) {
 	t.Logf("Pods not expected to be evicted: %v, pods expected to be evicted: %v", expectReservePodNames, expectEvictPodNames)
 
 	t.Logf("set the strategy to delete pods with label test:podlifetime-evict")
-	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", nil, false, &metav1.LabelSelector{MatchLabels: map[string]string{"test": "podlifetime-evict"}})
+	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", nil, false, &metav1.LabelSelector{MatchLabels: map[string]string{"test": "podlifetime-evict"}}, getPodsAssignedToNode)
 
 	t.Logf("Waiting 10s")
 	time.Sleep(10 * time.Second)
@@ -859,7 +883,7 @@ func TestPodLabelSelector(t *testing.T) {
 func TestEvictAnnotation(t *testing.T) {
 	ctx := context.Background()
 
-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 
 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
@@ -914,7 +938,7 @@ func TestEvictAnnotation(t *testing.T) {
 	t.Logf("Existing pods: %v", initialPodNames)
 
 	t.Log("Running PodLifetime strategy")
-	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", nil, false, nil)
+	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", nil, false, nil, getPodsAssignedToNode)
 
 	if err := wait.PollImmediate(5*time.Second, time.Minute, func() (bool, error) {
 		podList, err = clientSet.CoreV1().Pods(rc.Namespace).List(ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rc.Spec.Template.Labels).String()})
@@ -1288,3 +1312,36 @@ func waitForPodRunning(ctx context.Context, t *testing.T, clientSet clientset.In
 		t.Fatalf("Error waiting for pod running: %v", err)
 	}
 }
+
+func splitNodesAndWorkerNodes(nodes []v1.Node) ([]*v1.Node, []*v1.Node) {
+	var allNodes []*v1.Node
+	var workerNodes []*v1.Node
+	for i := range nodes {
+		node := nodes[i]
+		allNodes = append(allNodes, &node)
+		if _, exists := node.Labels["node-role.kubernetes.io/master"]; !exists {
+			workerNodes = append(workerNodes, &node)
+		}
+	}
+	return allNodes, workerNodes
+}
+
+func initPodEvictorOrFail(t *testing.T, clientSet clientset.Interface, nodes []*v1.Node) *evictions.PodEvictor {
+	evictionPolicyGroupVersion, err := eutils.SupportEviction(clientSet)
+	if err != nil || len(evictionPolicyGroupVersion) == 0 {
+		t.Fatalf("Error creating eviction policy group: %v", err)
+	}
+	return evictions.NewPodEvictor(
+		clientSet,
+		evictionPolicyGroupVersion,
+		false,
+		nil,
+		nil,
+		nodes,
+		true,
+		false,
+		false,
+		false,
+		false,
+	)
+}

test/e2e/e2e_toomanyrestarts_test.go

@@ -0,0 +1,196 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package e2e
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	appsv1 "k8s.io/api/apps/v1"
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	clientset "k8s.io/client-go/kubernetes"
+	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
+	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
+)
+
+func TestTooManyRestarts(t *testing.T) {
+	ctx := context.Background()
+
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
+	defer close(stopCh)
+
+	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
+	if err != nil {
+		t.Errorf("Error listing node with %v", err)
+	}
+
+	nodes, workerNodes := splitNodesAndWorkerNodes(nodeList.Items)
+
+	t.Logf("Creating testing namespace %v", t.Name())
+	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
+	if _, err := clientSet.CoreV1().Namespaces().Create(ctx, testNamespace, metav1.CreateOptions{}); err != nil {
+		t.Fatalf("Unable to create ns %v", testNamespace.Name)
+	}
+	defer clientSet.CoreV1().Namespaces().Delete(ctx, testNamespace.Name, metav1.DeleteOptions{})
+
+	deploymentObj := &appsv1.Deployment{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "restart-pod",
+			Namespace: testNamespace.Name,
+			Labels:    map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"},
+		},
+		Spec: appsv1.DeploymentSpec{
+			Replicas: func(i int32) *int32 { return &i }(4),
+			Selector: &metav1.LabelSelector{
+				MatchLabels: map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"},
+			},
+			Template: v1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"},
+				},
+				Spec: v1.PodSpec{
+					Containers: []v1.Container{{
+						Name:            "pause",
+						ImagePullPolicy: "Always",
+						Image:           "kubernetes/pause",
+						Command:         []string{"/bin/sh"},
+						Args:            []string{"-c", "sleep 1s && exit 1"},
+						Ports:           []v1.ContainerPort{{ContainerPort: 80}},
+					}},
+				},
+			},
+		},
+	}
+
+	t.Logf("Creating deployment %v", deploymentObj.Name)
+	_, err = clientSet.AppsV1().Deployments(deploymentObj.Namespace).Create(ctx, deploymentObj, metav1.CreateOptions{})
+	if err != nil {
+		t.Logf("Error creating deployment: %v", err)
+		if err = clientSet.AppsV1().Deployments(deploymentObj.Namespace).DeleteCollection(ctx, metav1.DeleteOptions{}, metav1.ListOptions{
+			LabelSelector: labels.SelectorFromSet(labels.Set(map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"})).String(),
+		}); err != nil {
+			t.Fatalf("Unable to delete deployment: %v", err)
+		}
+		return
+	}
+	defer clientSet.AppsV1().Deployments(deploymentObj.Namespace).Delete(ctx, deploymentObj.Name, metav1.DeleteOptions{})
+
+	// Need to wait restartCount more than 4
+	result, err := waitPodRestartCount(ctx, clientSet, testNamespace.Name, t)
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+	if !result {
+		t.Fatal("Pod restart count not as expected")
+	}
+
+	tests := []struct {
+		name                    string
+		podRestartThreshold     int32
+		includingInitContainers bool
+		expectedEvictedPodCount uint
+	}{
+		{
+			name:                    "test-no-evictions",
+			podRestartThreshold:     int32(10000),
+			includingInitContainers: true,
+			expectedEvictedPodCount: 0,
+		},
+		{
+			name:                    "test-one-evictions",
+			podRestartThreshold:     int32(4),
+			includingInitContainers: true,
+			expectedEvictedPodCount: 4,
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			evictionPolicyGroupVersion, err := eutils.SupportEviction(clientSet)
+			if err != nil || len(evictionPolicyGroupVersion) == 0 {
+				t.Fatalf("Error creating eviction policy group: %v", err)
+			}
+			podEvictor := evictions.NewPodEvictor(
+				clientSet,
+				evictionPolicyGroupVersion,
+				false,
+				nil,
+				nil,
+				nodes,
+				true,
+				false,
+				false,
+				false,
+				false,
+			)
+			// Run RemovePodsHavingTooManyRestarts strategy
+			t.Log("Running RemovePodsHavingTooManyRestarts strategy")
+			strategies.RemovePodsHavingTooManyRestarts(
+				ctx,
+				clientSet,
+				deschedulerapi.DeschedulerStrategy{
+					Enabled: true,
+					Params: &deschedulerapi.StrategyParameters{
+						PodsHavingTooManyRestarts: &deschedulerapi.PodsHavingTooManyRestarts{
+							PodRestartThreshold:     tc.podRestartThreshold,
+							IncludingInitContainers: tc.includingInitContainers,
+						},
+					},
+				},
+				workerNodes,
+				podEvictor,
+				getPodsAssignedToNode,
+			)
+
+			waitForTerminatingPodsToDisappear(ctx, t, clientSet, testNamespace.Name)
+			actualEvictedPodCount := podEvictor.TotalEvicted()
+			if actualEvictedPodCount < tc.expectedEvictedPodCount {
+				t.Errorf("Test error for description: %s. Unexpected number of pods have been evicted, got %v, expected %v", tc.name, actualEvictedPodCount, tc.expectedEvictedPodCount)
+			}
+		})
+	}
+}
+
+func waitPodRestartCount(ctx context.Context, clientSet clientset.Interface, namespace string, t *testing.T) (bool, error) {
+	timeout := time.After(5 * time.Minute)
+	tick := time.Tick(5 * time.Second)
+	for {
+		select {
+		case <-timeout:
+			t.Log("Timeout, still restart count not as expected")
+			return false, fmt.Errorf("timeout Error")
+		case <-tick:
+			podList, err := clientSet.CoreV1().Pods(namespace).List(ctx, metav1.ListOptions{
+				LabelSelector: labels.SelectorFromSet(labels.Set(map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"})).String(),
+			})
+			if podList.Items[0].Status.ContainerStatuses[0].RestartCount >= 4 && podList.Items[1].Status.ContainerStatuses[0].RestartCount >= 4 && podList.Items[2].Status.ContainerStatuses[0].RestartCount >= 4 && podList.Items[3].Status.ContainerStatuses[0].RestartCount >= 4 {
+				t.Log("Pod restartCount as expected")
+				return true, nil
+			}
+			if err != nil {
+				t.Fatalf("Unexpected err: %v", err)
+				return false, err
+			}
+		}
+	}
+}

test/e2e/e2e_topologyspreadconstraint_test.go

@@ -0,0 +1,159 @@
+package e2e
+
+import (
+	"context"
+	"fmt"
+	"math"
+	"strings"
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
+)
+
+const zoneTopologyKey string = "topology.kubernetes.io/zone"
+
+func TestTopologySpreadConstraint(t *testing.T) {
+	ctx := context.Background()
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
+	defer close(stopCh)
+	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
+	if err != nil {
+		t.Errorf("Error listing node with %v", err)
+	}
+	nodes, workerNodes := splitNodesAndWorkerNodes(nodeList.Items)
+	t.Log("Creating testing namespace")
+	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
+	if _, err := clientSet.CoreV1().Namespaces().Create(ctx, testNamespace, metav1.CreateOptions{}); err != nil {
+		t.Fatalf("Unable to create ns %v", testNamespace.Name)
+	}
+	defer clientSet.CoreV1().Namespaces().Delete(ctx, testNamespace.Name, metav1.DeleteOptions{})
+
+	testCases := map[string]struct {
+		replicaCount int
+		maxSkew      int
+		labelKey     string
+		labelValue   string
+		constraint   v1.UnsatisfiableConstraintAction
+	}{
+		"test-rc-topology-spread-hard-constraint": {
+			replicaCount: 4,
+			maxSkew:      1,
+			labelKey:     "test",
+			labelValue:   "topology-spread-hard-constraint",
+			constraint:   v1.DoNotSchedule,
+		},
+		"test-rc-topology-spread-soft-constraint": {
+			replicaCount: 4,
+			maxSkew:      1,
+			labelKey:     "test",
+			labelValue:   "topology-spread-soft-constraint",
+			constraint:   v1.ScheduleAnyway,
+		},
+	}
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			t.Logf("Creating RC %s with %d replicas", name, tc.replicaCount)
+			rc := RcByNameContainer(name, testNamespace.Name, int32(tc.replicaCount), map[string]string{tc.labelKey: tc.labelValue}, nil, "")
+			rc.Spec.Template.Spec.TopologySpreadConstraints = makeTopologySpreadConstraints(tc.maxSkew, tc.labelKey, tc.labelValue, tc.constraint)
+			if _, err := clientSet.CoreV1().ReplicationControllers(rc.Namespace).Create(ctx, rc, metav1.CreateOptions{}); err != nil {
+				t.Fatalf("Error creating RC %s %v", name, err)
+			}
+			defer deleteRC(ctx, t, clientSet, rc)
+			waitForRCPodsRunning(ctx, t, clientSet, rc)
+
+			// Create a "Violator" RC that has the same label and is forced to be on the same node using a nodeSelector
+			violatorRcName := name + "-violator"
+			violatorCount := tc.maxSkew + 1
+			violatorRc := RcByNameContainer(violatorRcName, testNamespace.Name, int32(violatorCount), map[string]string{tc.labelKey: tc.labelValue}, nil, "")
+			violatorRc.Spec.Template.Spec.NodeSelector = map[string]string{zoneTopologyKey: workerNodes[0].Labels[zoneTopologyKey]}
+			rc.Spec.Template.Spec.TopologySpreadConstraints = makeTopologySpreadConstraints(tc.maxSkew, tc.labelKey, tc.labelValue, tc.constraint)
+			if _, err := clientSet.CoreV1().ReplicationControllers(rc.Namespace).Create(ctx, violatorRc, metav1.CreateOptions{}); err != nil {
+				t.Fatalf("Error creating RC %s: %v", violatorRcName, err)
+			}
+			defer deleteRC(ctx, t, clientSet, violatorRc)
+			waitForRCPodsRunning(ctx, t, clientSet, violatorRc)
+
+			podEvictor := initPodEvictorOrFail(t, clientSet, nodes)
+
+			// Run TopologySpreadConstraint strategy
+			t.Logf("Running RemovePodsViolatingTopologySpreadConstraint strategy for %s", name)
+			strategies.RemovePodsViolatingTopologySpreadConstraint(
+				ctx,
+				clientSet,
+				deschedulerapi.DeschedulerStrategy{
+					Enabled: true,
+					Params: &deschedulerapi.StrategyParameters{
+						IncludeSoftConstraints: tc.constraint != v1.DoNotSchedule,
+					},
+				},
+				nodes,
+				podEvictor,
+				getPodsAssignedToNode,
+			)
+			t.Logf("Finished RemovePodsViolatingTopologySpreadConstraint strategy for %s", name)
+
+			t.Logf("Wait for terminating pods of %s to disappear", name)
+			waitForTerminatingPodsToDisappear(ctx, t, clientSet, rc.Namespace)
+
+			if totalEvicted := podEvictor.TotalEvicted(); totalEvicted > 0 {
+				t.Logf("Total of %d Pods were evicted for %s", totalEvicted, name)
+			} else {
+				t.Fatalf("Pods were not evicted for %s TopologySpreadConstraint", name)
+			}
+
+			// Ensure recently evicted Pod are rescheduled and running before asserting for a balanced topology spread
+			waitForRCPodsRunning(ctx, t, clientSet, rc)
+
+			pods, err := clientSet.CoreV1().Pods(testNamespace.Name).List(ctx, metav1.ListOptions{LabelSelector: fmt.Sprintf("%s=%s", tc.labelKey, tc.labelValue)})
+			if err != nil {
+				t.Errorf("Error listing pods for %s: %v", name, err)
+			}
+
+			nodePodCountMap := make(map[string]int)
+			for _, pod := range pods.Items {
+				nodePodCountMap[pod.Spec.NodeName]++
+			}
+
+			if len(nodePodCountMap) != len(workerNodes) {
+				t.Errorf("%s Pods were scheduled on only '%d' nodes and were not properly distributed on the nodes", name, len(nodePodCountMap))
+			}
+
+			min, max := getMinAndMaxPodDistribution(nodePodCountMap)
+			if max-min > tc.maxSkew {
+				t.Errorf("Pod distribution for %s is still violating the max skew of %d as it is %d", name, tc.maxSkew, max-min)
+			}
+
+			t.Logf("Pods for %s were distributed in line with max skew of %d", name, tc.maxSkew)
+		})
+	}
+}
+
+func makeTopologySpreadConstraints(maxSkew int, labelKey, labelValue string, constraint v1.UnsatisfiableConstraintAction) []v1.TopologySpreadConstraint {
+	return []v1.TopologySpreadConstraint{
+		{
+			MaxSkew:           int32(maxSkew),
+			TopologyKey:       zoneTopologyKey,
+			WhenUnsatisfiable: constraint,
+			LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{labelKey: labelValue}},
+		},
+	}
+}
+
+func getMinAndMaxPodDistribution(nodePodCountMap map[string]int) (int, int) {
+	min := math.MaxInt32
+	max := math.MinInt32
+	for _, podCount := range nodePodCountMap {
+		if podCount < min {
+			min = podCount
+		}
+		if podCount > max {
+			max = podCount
+		}
+	}
+
+	return min, max
+}

test/run-e2e-tests.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 # Copyright 2017 The Kubernetes Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-#!/bin/bash
-
 set -x
 set -o errexit
 set -o nounset

test/run-helm-tests.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 # Copyright 2021 The Kubernetes Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,12 +14,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-#!/bin/bash
 set -o errexit
 set -o nounset
 set -o pipefail
 
-K8S_VERSION=${KUBERNETES_VERSION:-v1.21.1}
+K8S_VERSION=${KUBERNETES_VERSION:-v1.23.0}
 IMAGE_REPO=${HELM_IMAGE_REPO:-descheduler}
 IMAGE_TAG=${HELM_IMAGE_TAG:-helm-test}
 CHART_LOCATION=${HELM_CHART_LOCATION:-./charts/descheduler}
@@ -28,8 +29,8 @@ mv kind-linux-amd64 kind
 export PATH=$PATH:$PWD
 kind create cluster --image kindest/node:"${K8S_VERSION}" --config=./hack/kind_config.yaml
 kind load docker-image descheduler:helm-test
-helm install descheduler-ci --set image.repository="${IMAGE_REPO}",image.tag="${IMAGE_TAG}" --namespace kube-system "${CHART_LOCATION}"
-sleep 20s
+helm install descheduler-ci --set image.repository="${IMAGE_REPO}",image.tag="${IMAGE_TAG}",schedule="* * * * *" --namespace kube-system "${CHART_LOCATION}"
+sleep 61 # sleep until Job is triggered
 helm test descheduler-ci --namespace kube-system
 
 # Delete kind cluster once test is finished

test/run-unit-tests.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 # Copyright 2017 The Kubernetes Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-#!/bin/bash
-
 set -x
 set -o errexit
 set -o nounset

vendor/cloud.google.com/go/compute/metadata/metadata.go

@@ -140,7 +140,7 @@ func testOnGCE() bool {
 	}()
 
 	go func() {
-		addrs, err := net.LookupHost("metadata.google.internal")
+		addrs, err := net.DefaultResolver.LookupHost(ctx, "metadata.google.internal")
 		if err != nil || len(addrs) == 0 {
 			resc <- false
 			return
@@ -296,6 +296,7 @@ func (c *Client) getETag(suffix string) (value, etag string, err error) {
 		// being stable anyway.
 		host = metadataIP
 	}
+	suffix = strings.TrimLeft(suffix, "/")
 	u := "http://" + host + "/computeMetadata/v1/" + suffix
 	req, err := http.NewRequest("GET", u, nil)
 	if err != nil {

vendor/github.com/Azure/go-autorest/autorest/adal/go.mod

@@ -1,12 +0,0 @@
-module github.com/Azure/go-autorest/autorest/adal
-
-go 1.12
-
-require (
-	github.com/Azure/go-autorest v14.2.0+incompatible
-	github.com/Azure/go-autorest/autorest/date v0.3.0
-	github.com/Azure/go-autorest/autorest/mocks v0.4.1
-	github.com/Azure/go-autorest/tracing v0.6.0
-	github.com/form3tech-oss/jwt-go v3.2.2+incompatible
-	golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0
-)

vendor/github.com/Azure/go-autorest/autorest/adal/go.sum

@@ -1,19 +0,0 @@
-github.com/Azure/go-autorest v14.2.0+incompatible h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=
-github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
-github.com/Azure/go-autorest/autorest/date v0.3.0 h1:7gUk1U5M/CQbp9WoqinNzJar+8KY+LPI6wiWrP/myHw=
-github.com/Azure/go-autorest/autorest/date v0.3.0/go.mod h1:BI0uouVdmngYNUzGWeSYnokU+TrmwEsOqdt8Y6sso74=
-github.com/Azure/go-autorest/autorest/mocks v0.4.1 h1:K0laFcLE6VLTOwNgSxaGbUcLPuGXlNkbVvq4cW4nIHk=
-github.com/Azure/go-autorest/autorest/mocks v0.4.1/go.mod h1:LTp+uSrOhSkaKrUy935gNZuuIPPVsHlr9DSOxSayd+k=
-github.com/Azure/go-autorest/tracing v0.6.0 h1:TYi4+3m5t6K48TGI9AUdb+IzbnSxvnvUMfuitfgcfuo=
-github.com/Azure/go-autorest/tracing v0.6.0/go.mod h1:+vhtPC754Xsa23ID7GlGsrdKBpUA79WCAKPPZVC2DeU=
-github.com/form3tech-oss/jwt-go v3.2.2+incompatible h1:TcekIExNqud5crz4xD2pavyTgWiPvpYe4Xau31I0PRk=
-github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0 h1:hb9wdF1z5waM+dSIICn1l0DkLVDT3hqhhQsDNUmHPRE=
-golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

vendor/github.com/Azure/go-autorest/autorest/adal/sender.go

@@ -28,6 +28,7 @@ const (
 	mimeTypeFormPost = "application/x-www-form-urlencoded"
 )
 
+// DO NOT ACCESS THIS DIRECTLY.  go through sender()
 var defaultSender Sender
 var defaultSenderInit = &sync.Once{}
 

vendor/github.com/Azure/go-autorest/autorest/adal/token.go

@@ -30,11 +30,13 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
 
 	"github.com/Azure/go-autorest/autorest/date"
+	"github.com/Azure/go-autorest/logger"
 	"github.com/form3tech-oss/jwt-go"
 )
 
@@ -69,13 +71,22 @@ const (
 	defaultMaxMSIRefreshAttempts = 5
 
 	// asMSIEndpointEnv is the environment variable used to store the endpoint on App Service and Functions
-	asMSIEndpointEnv = "MSI_ENDPOINT"
+	msiEndpointEnv = "MSI_ENDPOINT"
 
 	// asMSISecretEnv is the environment variable used to store the request secret on App Service and Functions
-	asMSISecretEnv = "MSI_SECRET"
+	msiSecretEnv = "MSI_SECRET"
 
-	// the API version to use for the App Service MSI endpoint
-	appServiceAPIVersion = "2017-09-01"
+	// the API version to use for the legacy App Service MSI endpoint
+	appServiceAPIVersion2017 = "2017-09-01"
+
+	// secret header used when authenticating against app service MSI endpoint
+	secretHeader = "Secret"
+
+	// the format for expires_on in UTC with AM/PM
+	expiresOnDateFormatPM = "1/2/2006 15:04:05 PM +00:00"
+
+	// the format for expires_on in UTC without AM/PM
+	expiresOnDateFormat = "1/2/2006 15:04:05 +00:00"
 )
 
 // OAuthTokenProvider is an interface which should be implemented by an access token retriever
@@ -282,6 +293,8 @@ func (secret ServicePrincipalCertificateSecret) MarshalJSON() ([]byte, error) {
 
 // ServicePrincipalMSISecret implements ServicePrincipalSecret for machines running the MSI Extension.
 type ServicePrincipalMSISecret struct {
+	msiType          msiType
+	clientResourceID string
 }
 
 // SetAuthenticationValues is a method of the interface ServicePrincipalSecret.
@@ -652,94 +665,173 @@ func NewServicePrincipalTokenFromAuthorizationCode(oauthConfig OAuthConfig, clie
 	)
 }
 
+type msiType int
+
+const (
+	msiTypeUnavailable msiType = iota
+	msiTypeAppServiceV20170901
+	msiTypeCloudShell
+	msiTypeIMDS
+)
+
+func (m msiType) String() string {
+	switch m {
+	case msiTypeUnavailable:
+		return "unavailable"
+	case msiTypeAppServiceV20170901:
+		return "AppServiceV20170901"
+	case msiTypeCloudShell:
+		return "CloudShell"
+	case msiTypeIMDS:
+		return "IMDS"
+	default:
+		return fmt.Sprintf("unhandled MSI type %d", m)
+	}
+}
+
+// returns the MSI type and endpoint, or an error
+func getMSIType() (msiType, string, error) {
+	if endpointEnvVar := os.Getenv(msiEndpointEnv); endpointEnvVar != "" {
+		// if the env var MSI_ENDPOINT is set
+		if secretEnvVar := os.Getenv(msiSecretEnv); secretEnvVar != "" {
+			// if BOTH the env vars MSI_ENDPOINT and MSI_SECRET are set the msiType is AppService
+			return msiTypeAppServiceV20170901, endpointEnvVar, nil
+		}
+		// if ONLY the env var MSI_ENDPOINT is set the msiType is CloudShell
+		return msiTypeCloudShell, endpointEnvVar, nil
+	} else if msiAvailableHook(context.Background(), sender()) {
+		// if MSI_ENDPOINT is NOT set AND the IMDS endpoint is available the msiType is IMDS. This will timeout after 500 milliseconds
+		return msiTypeIMDS, msiEndpoint, nil
+	} else {
+		// if MSI_ENDPOINT is NOT set and IMDS endpoint is not available Managed Identity is not available
+		return msiTypeUnavailable, "", errors.New("MSI not available")
+	}
+}
+
 // GetMSIVMEndpoint gets the MSI endpoint on Virtual Machines.
+// NOTE: this always returns the IMDS endpoint, it does not work for app services or cloud shell.
+// Deprecated: NewServicePrincipalTokenFromMSI() and variants will automatically detect the endpoint.
 func GetMSIVMEndpoint() (string, error) {
 	return msiEndpoint, nil
 }
 
-// NOTE: this only indicates if the ASE environment credentials have been set
-// which does not necessarily mean that the caller is authenticating via ASE!
-func isAppService() bool {
-	_, asMSIEndpointEnvExists := os.LookupEnv(asMSIEndpointEnv)
-	_, asMSISecretEnvExists := os.LookupEnv(asMSISecretEnv)
-
-	return asMSIEndpointEnvExists && asMSISecretEnvExists
-}
-
-// GetMSIAppServiceEndpoint get the MSI endpoint for App Service and Functions
+// GetMSIAppServiceEndpoint get the MSI endpoint for App Service and Functions.
+// It will return an error when not running in an app service/functions environment.
+// Deprecated: NewServicePrincipalTokenFromMSI() and variants will automatically detect the endpoint.
 func GetMSIAppServiceEndpoint() (string, error) {
-	asMSIEndpoint, asMSIEndpointEnvExists := os.LookupEnv(asMSIEndpointEnv)
-
-	if asMSIEndpointEnvExists {
-		return asMSIEndpoint, nil
+	msiType, endpoint, err := getMSIType()
+	if err != nil {
+		return "", err
+	}
+	switch msiType {
+	case msiTypeAppServiceV20170901:
+		return endpoint, nil
+	default:
+		return "", fmt.Errorf("%s is not app service environment", msiType)
 	}
-	return "", errors.New("MSI endpoint not found")
 }
 
 // GetMSIEndpoint get the appropriate MSI endpoint depending on the runtime environment
+// Deprecated: NewServicePrincipalTokenFromMSI() and variants will automatically detect the endpoint.
 func GetMSIEndpoint() (string, error) {
-	if isAppService() {
-		return GetMSIAppServiceEndpoint()
-	}
-	return GetMSIVMEndpoint()
+	_, endpoint, err := getMSIType()
+	return endpoint, err
 }
 
 // NewServicePrincipalTokenFromMSI creates a ServicePrincipalToken via the MSI VM Extension.
 // It will use the system assigned identity when creating the token.
+// msiEndpoint - empty string, or pass a non-empty string to override the default value.
+// Deprecated: use NewServicePrincipalTokenFromManagedIdentity() instead.
 func NewServicePrincipalTokenFromMSI(msiEndpoint, resource string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
-	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, nil, nil, callbacks...)
+	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, "", "", callbacks...)
 }
 
 // NewServicePrincipalTokenFromMSIWithUserAssignedID creates a ServicePrincipalToken via the MSI VM Extension.
 // It will use the clientID of specified user assigned identity when creating the token.
+// msiEndpoint - empty string, or pass a non-empty string to override the default value.
+// Deprecated: use NewServicePrincipalTokenFromManagedIdentity() instead.
 func NewServicePrincipalTokenFromMSIWithUserAssignedID(msiEndpoint, resource string, userAssignedID string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
-	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, &userAssignedID, nil, callbacks...)
+	if err := validateStringParam(userAssignedID, "userAssignedID"); err != nil {
+		return nil, err
+	}
+	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, userAssignedID, "", callbacks...)
 }
 
 // NewServicePrincipalTokenFromMSIWithIdentityResourceID creates a ServicePrincipalToken via the MSI VM Extension.
 // It will use the azure resource id of user assigned identity when creating the token.
+// msiEndpoint - empty string, or pass a non-empty string to override the default value.
+// Deprecated: use NewServicePrincipalTokenFromManagedIdentity() instead.
 func NewServicePrincipalTokenFromMSIWithIdentityResourceID(msiEndpoint, resource string, identityResourceID string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
-	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, nil, &identityResourceID, callbacks...)
-}
-
-func newServicePrincipalTokenFromMSI(msiEndpoint, resource string, userAssignedID *string, identityResourceID *string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
-	if err := validateStringParam(msiEndpoint, "msiEndpoint"); err != nil {
+	if err := validateStringParam(identityResourceID, "identityResourceID"); err != nil {
 		return nil, err
 	}
+	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, "", identityResourceID, callbacks...)
+}
+
+// ManagedIdentityOptions contains optional values for configuring managed identity authentication.
+type ManagedIdentityOptions struct {
+	// ClientID is the user-assigned identity to use during authentication.
+	// It is mutually exclusive with IdentityResourceID.
+	ClientID string
+
+	// IdentityResourceID is the resource ID of the user-assigned identity to use during authentication.
+	// It is mutually exclusive with ClientID.
+	IdentityResourceID string
+}
+
+// NewServicePrincipalTokenFromManagedIdentity creates a ServicePrincipalToken using a managed identity.
+// It supports the following managed identity environments.
+// - App Service Environment (API version 2017-09-01 only)
+// - Cloud shell
+// - IMDS with a system or user assigned identity
+func NewServicePrincipalTokenFromManagedIdentity(resource string, options *ManagedIdentityOptions, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
+	if options == nil {
+		options = &ManagedIdentityOptions{}
+	}
+	return newServicePrincipalTokenFromMSI("", resource, options.ClientID, options.IdentityResourceID, callbacks...)
+}
+
+func newServicePrincipalTokenFromMSI(msiEndpoint, resource, userAssignedID, identityResourceID string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
 	if err := validateStringParam(resource, "resource"); err != nil {
 		return nil, err
 	}
-	if userAssignedID != nil {
-		if err := validateStringParam(*userAssignedID, "userAssignedID"); err != nil {
-			return nil, err
-		}
+	if userAssignedID != "" && identityResourceID != "" {
+		return nil, errors.New("cannot specify userAssignedID and identityResourceID")
 	}
-	if identityResourceID != nil {
-		if err := validateStringParam(*identityResourceID, "identityResourceID"); err != nil {
-			return nil, err
-		}
+	msiType, endpoint, err := getMSIType()
+	if err != nil {
+		logger.Instance.Writef(logger.LogError, "Error determining managed identity environment: %v", err)
+		return nil, err
 	}
-	// We set the oauth config token endpoint to be MSI's endpoint
-	msiEndpointURL, err := url.Parse(msiEndpoint)
+	logger.Instance.Writef(logger.LogInfo, "Managed identity environment is %s, endpoint is %s", msiType, endpoint)
+	if msiEndpoint != "" {
+		endpoint = msiEndpoint
+		logger.Instance.Writef(logger.LogInfo, "Managed identity custom endpoint is %s", endpoint)
+	}
+	msiEndpointURL, err := url.Parse(endpoint)
 	if err != nil {
 		return nil, err
 	}
-
-	v := url.Values{}
-	v.Set("resource", resource)
-	// App Service MSI currently only supports token API version 2017-09-01
-	if isAppService() {
-		v.Set("api-version", appServiceAPIVersion)
-	} else {
-		v.Set("api-version", msiAPIVersion)
+	// cloud shell sends its data in the request body
+	if msiType != msiTypeCloudShell {
+		v := url.Values{}
+		v.Set("resource", resource)
+		clientIDParam := "client_id"
+		switch msiType {
+		case msiTypeAppServiceV20170901:
+			clientIDParam = "clientid"
+			v.Set("api-version", appServiceAPIVersion2017)
+			break
+		case msiTypeIMDS:
+			v.Set("api-version", msiAPIVersion)
+		}
+		if userAssignedID != "" {
+			v.Set(clientIDParam, userAssignedID)
+		} else if identityResourceID != "" {
+			v.Set("mi_res_id", identityResourceID)
+		}
+		msiEndpointURL.RawQuery = v.Encode()
 	}
-	if userAssignedID != nil {
-		v.Set("client_id", *userAssignedID)
-	}
-	if identityResourceID != nil {
-		v.Set("mi_res_id", *identityResourceID)
-	}
-	msiEndpointURL.RawQuery = v.Encode()
 
 	spt := &ServicePrincipalToken{
 		inner: servicePrincipalToken{
@@ -747,10 +839,14 @@ func newServicePrincipalTokenFromMSI(msiEndpoint, resource string, userAssignedI
 			OauthConfig: OAuthConfig{
 				TokenEndpoint: *msiEndpointURL,
 			},
-			Secret:        &ServicePrincipalMSISecret{},
+			Secret: &ServicePrincipalMSISecret{
+				msiType:          msiType,
+				clientResourceID: identityResourceID,
+			},
 			Resource:      resource,
 			AutoRefresh:   true,
 			RefreshWithin: defaultRefresh,
+			ClientID:      userAssignedID,
 		},
 		refreshLock:           &sync.RWMutex{},
 		sender:                sender(),
@@ -758,10 +854,6 @@ func newServicePrincipalTokenFromMSI(msiEndpoint, resource string, userAssignedI
 		MaxMSIRefreshAttempts: defaultMaxMSIRefreshAttempts,
 	}
 
-	if userAssignedID != nil {
-		spt.inner.ClientID = *userAssignedID
-	}
-
 	return spt, nil
 }
 
@@ -858,31 +950,6 @@ func (spt *ServicePrincipalToken) getGrantType() string {
 	}
 }
 
-func isIMDS(u url.URL) bool {
-	return isMSIEndpoint(u) == true || isASEEndpoint(u) == true
-}
-
-func isMSIEndpoint(endpoint url.URL) bool {
-	msi, err := url.Parse(msiEndpoint)
-	if err != nil {
-		return false
-	}
-	return endpoint.Host == msi.Host && endpoint.Path == msi.Path
-}
-
-func isASEEndpoint(endpoint url.URL) bool {
-	aseEndpoint, err := GetMSIAppServiceEndpoint()
-	if err != nil {
-		// app service environment isn't enabled
-		return false
-	}
-	ase, err := url.Parse(aseEndpoint)
-	if err != nil {
-		return false
-	}
-	return endpoint.Host == ase.Host && endpoint.Path == ase.Path
-}
-
 func (spt *ServicePrincipalToken) refreshInternal(ctx context.Context, resource string) error {
 	if spt.customRefreshFunc != nil {
 		token, err := spt.customRefreshFunc(ctx, resource)
@@ -892,19 +959,45 @@ func (spt *ServicePrincipalToken) refreshInternal(ctx context.Context, resource
 		spt.inner.Token = *token
 		return spt.InvokeRefreshCallbacks(spt.inner.Token)
 	}
-
 	req, err := http.NewRequest(http.MethodPost, spt.inner.OauthConfig.TokenEndpoint.String(), nil)
 	if err != nil {
 		return fmt.Errorf("adal: Failed to build the refresh request. Error = '%v'", err)
 	}
 	req.Header.Add("User-Agent", UserAgent())
-	// Add header when runtime is on App Service or Functions
-	if isASEEndpoint(spt.inner.OauthConfig.TokenEndpoint) {
-		asMSISecret, _ := os.LookupEnv(asMSISecretEnv)
-		req.Header.Add("Secret", asMSISecret)
-	}
 	req = req.WithContext(ctx)
-	if !isIMDS(spt.inner.OauthConfig.TokenEndpoint) {
+	var resp *http.Response
+	authBodyFilter := func(b []byte) []byte {
+		if logger.Level() != logger.LogAuth {
+			return []byte("**REDACTED** authentication body")
+		}
+		return b
+	}
+	if msiSecret, ok := spt.inner.Secret.(*ServicePrincipalMSISecret); ok {
+		switch msiSecret.msiType {
+		case msiTypeAppServiceV20170901:
+			req.Method = http.MethodGet
+			req.Header.Set("secret", os.Getenv(msiSecretEnv))
+			break
+		case msiTypeCloudShell:
+			req.Header.Set("Metadata", "true")
+			data := url.Values{}
+			data.Set("resource", spt.inner.Resource)
+			if spt.inner.ClientID != "" {
+				data.Set("client_id", spt.inner.ClientID)
+			} else if msiSecret.clientResourceID != "" {
+				data.Set("msi_res_id", msiSecret.clientResourceID)
+			}
+			req.Body = ioutil.NopCloser(strings.NewReader(data.Encode()))
+			req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+			break
+		case msiTypeIMDS:
+			req.Method = http.MethodGet
+			req.Header.Set("Metadata", "true")
+			break
+		}
+		logger.Instance.WriteRequest(req, logger.Filter{Body: authBodyFilter})
+		resp, err = retryForIMDS(spt.sender, req, spt.MaxMSIRefreshAttempts)
+	} else {
 		v := url.Values{}
 		v.Set("client_id", spt.inner.ClientID)
 		v.Set("resource", resource)
@@ -933,40 +1026,26 @@ func (spt *ServicePrincipalToken) refreshInternal(ctx context.Context, resource
 		req.ContentLength = int64(len(s))
 		req.Header.Set(contentType, mimeTypeFormPost)
 		req.Body = body
-	}
-
-	if _, ok := spt.inner.Secret.(*ServicePrincipalMSISecret); ok {
-		req.Method = http.MethodGet
-		req.Header.Set(metadataHeader, "true")
-	}
-
-	var resp *http.Response
-	if isMSIEndpoint(spt.inner.OauthConfig.TokenEndpoint) {
-		resp, err = getMSIEndpoint(ctx, spt.sender)
-		if err != nil {
-			// return a TokenRefreshError here so that we don't keep retrying
-			return newTokenRefreshError(fmt.Sprintf("the MSI endpoint is not available. Failed HTTP request to MSI endpoint: %v", err), nil)
-		}
-		resp.Body.Close()
-	}
-	if isIMDS(spt.inner.OauthConfig.TokenEndpoint) {
-		resp, err = retryForIMDS(spt.sender, req, spt.MaxMSIRefreshAttempts)
-	} else {
+		logger.Instance.WriteRequest(req, logger.Filter{Body: authBodyFilter})
 		resp, err = spt.sender.Do(req)
 	}
+
+	// don't return a TokenRefreshError here; this will allow retry logic to apply
 	if err != nil {
-		// don't return a TokenRefreshError here; this will allow retry logic to apply
 		return fmt.Errorf("adal: Failed to execute the refresh request. Error = '%v'", err)
+	} else if resp == nil {
+		return fmt.Errorf("adal: received nil response and error")
 	}
 
+	logger.Instance.WriteResponse(resp, logger.Filter{Body: authBodyFilter})
 	defer resp.Body.Close()
 	rb, err := ioutil.ReadAll(resp.Body)
 
 	if resp.StatusCode != http.StatusOK {
 		if err != nil {
-			return newTokenRefreshError(fmt.Sprintf("adal: Refresh request failed. Status Code = '%d'. Failed reading response body: %v", resp.StatusCode, err), resp)
+			return newTokenRefreshError(fmt.Sprintf("adal: Refresh request failed. Status Code = '%d'. Failed reading response body: %v Endpoint %s", resp.StatusCode, err, req.URL.String()), resp)
 		}
-		return newTokenRefreshError(fmt.Sprintf("adal: Refresh request failed. Status Code = '%d'. Response body: %s", resp.StatusCode, string(rb)), resp)
+		return newTokenRefreshError(fmt.Sprintf("adal: Refresh request failed. Status Code = '%d'. Response body: %s Endpoint %s", resp.StatusCode, string(rb), req.URL.String()), resp)
 	}
 
 	// for the following error cases don't return a TokenRefreshError.  the operation succeeded
@@ -979,15 +1058,60 @@ func (spt *ServicePrincipalToken) refreshInternal(ctx context.Context, resource
 	if len(strings.Trim(string(rb), " ")) == 0 {
 		return fmt.Errorf("adal: Empty service principal token received during refresh")
 	}
-	var token Token
+	token := struct {
+		AccessToken  string `json:"access_token"`
+		RefreshToken string `json:"refresh_token"`
+
+		// AAD returns expires_in as a string, ADFS returns it as an int
+		ExpiresIn json.Number `json:"expires_in"`
+		// expires_on can be in two formats, a UTC time stamp or the number of seconds.
+		ExpiresOn string      `json:"expires_on"`
+		NotBefore json.Number `json:"not_before"`
+
+		Resource string `json:"resource"`
+		Type     string `json:"token_type"`
+	}{}
+	// return a TokenRefreshError in the follow error cases as the token is in an unexpected format
 	err = json.Unmarshal(rb, &token)
 	if err != nil {
-		return fmt.Errorf("adal: Failed to unmarshal the service principal token during refresh. Error = '%v' JSON = '%s'", err, string(rb))
+		return newTokenRefreshError(fmt.Sprintf("adal: Failed to unmarshal the service principal token during refresh. Error = '%v' JSON = '%s'", err, string(rb)), resp)
 	}
+	expiresOn := json.Number("")
+	// ADFS doesn't include the expires_on field
+	if token.ExpiresOn != "" {
+		if expiresOn, err = parseExpiresOn(token.ExpiresOn); err != nil {
+			return newTokenRefreshError(fmt.Sprintf("adal: failed to parse expires_on: %v value '%s'", err, token.ExpiresOn), resp)
+		}
+	}
+	spt.inner.Token.AccessToken = token.AccessToken
+	spt.inner.Token.RefreshToken = token.RefreshToken
+	spt.inner.Token.ExpiresIn = token.ExpiresIn
+	spt.inner.Token.ExpiresOn = expiresOn
+	spt.inner.Token.NotBefore = token.NotBefore
+	spt.inner.Token.Resource = token.Resource
+	spt.inner.Token.Type = token.Type
 
-	spt.inner.Token = token
+	return spt.InvokeRefreshCallbacks(spt.inner.Token)
+}
 
-	return spt.InvokeRefreshCallbacks(token)
+// converts expires_on to the number of seconds
+func parseExpiresOn(s string) (json.Number, error) {
+	// convert the expiration date to the number of seconds from now
+	timeToDuration := func(t time.Time) json.Number {
+		dur := t.Sub(time.Now().UTC())
+		return json.Number(strconv.FormatInt(int64(dur.Round(time.Second).Seconds()), 10))
+	}
+	if _, err := strconv.ParseInt(s, 10, 64); err == nil {
+		// this is the number of seconds case, no conversion required
+		return json.Number(s), nil
+	} else if eo, err := time.Parse(expiresOnDateFormatPM, s); err == nil {
+		return timeToDuration(eo), nil
+	} else if eo, err := time.Parse(expiresOnDateFormat, s); err == nil {
+		return timeToDuration(eo), nil
+	} else {
+		// unknown format
+		return json.Number(""), err
+	}
 }
 
 // retry logic specific to retrieving a token from the IMDS endpoint
@@ -1118,46 +1242,6 @@ func (mt *MultiTenantServicePrincipalToken) AuxiliaryOAuthTokens() []string {
 	return tokens
 }
 
-// EnsureFreshWithContext will refresh the token if it will expire within the refresh window (as set by
-// RefreshWithin) and autoRefresh flag is on.  This method is safe for concurrent use.
-func (mt *MultiTenantServicePrincipalToken) EnsureFreshWithContext(ctx context.Context) error {
-	if err := mt.PrimaryToken.EnsureFreshWithContext(ctx); err != nil {
-		return fmt.Errorf("failed to refresh primary token: %v", err)
-	}
-	for _, aux := range mt.AuxiliaryTokens {
-		if err := aux.EnsureFreshWithContext(ctx); err != nil {
-			return fmt.Errorf("failed to refresh auxiliary token: %v", err)
-		}
-	}
-	return nil
-}
-
-// RefreshWithContext obtains a fresh token for the Service Principal.
-func (mt *MultiTenantServicePrincipalToken) RefreshWithContext(ctx context.Context) error {
-	if err := mt.PrimaryToken.RefreshWithContext(ctx); err != nil {
-		return fmt.Errorf("failed to refresh primary token: %v", err)
-	}
-	for _, aux := range mt.AuxiliaryTokens {
-		if err := aux.RefreshWithContext(ctx); err != nil {
-			return fmt.Errorf("failed to refresh auxiliary token: %v", err)
-		}
-	}
-	return nil
-}
-
-// RefreshExchangeWithContext refreshes the token, but for a different resource.
-func (mt *MultiTenantServicePrincipalToken) RefreshExchangeWithContext(ctx context.Context, resource string) error {
-	if err := mt.PrimaryToken.RefreshExchangeWithContext(ctx, resource); err != nil {
-		return fmt.Errorf("failed to refresh primary token: %v", err)
-	}
-	for _, aux := range mt.AuxiliaryTokens {
-		if err := aux.RefreshExchangeWithContext(ctx, resource); err != nil {
-			return fmt.Errorf("failed to refresh auxiliary token: %v", err)
-		}
-	}
-	return nil
-}
-
 // NewMultiTenantServicePrincipalToken creates a new MultiTenantServicePrincipalToken with the specified credentials and resource.
 func NewMultiTenantServicePrincipalToken(multiTenantCfg MultiTenantOAuthConfig, clientID string, secret string, resource string) (*MultiTenantServicePrincipalToken, error) {
 	if err := validateStringParam(clientID, "clientID"); err != nil {
@@ -1188,6 +1272,55 @@ func NewMultiTenantServicePrincipalToken(multiTenantCfg MultiTenantOAuthConfig,
 	return &m, nil
 }
 
+// NewMultiTenantServicePrincipalTokenFromCertificate creates a new MultiTenantServicePrincipalToken with the specified certificate credentials and resource.
+func NewMultiTenantServicePrincipalTokenFromCertificate(multiTenantCfg MultiTenantOAuthConfig, clientID string, certificate *x509.Certificate, privateKey *rsa.PrivateKey, resource string) (*MultiTenantServicePrincipalToken, error) {
+	if err := validateStringParam(clientID, "clientID"); err != nil {
+		return nil, err
+	}
+	if err := validateStringParam(resource, "resource"); err != nil {
+		return nil, err
+	}
+	if certificate == nil {
+		return nil, fmt.Errorf("parameter 'certificate' cannot be nil")
+	}
+	if privateKey == nil {
+		return nil, fmt.Errorf("parameter 'privateKey' cannot be nil")
+	}
+	auxTenants := multiTenantCfg.AuxiliaryTenants()
+	m := MultiTenantServicePrincipalToken{
+		AuxiliaryTokens: make([]*ServicePrincipalToken, len(auxTenants)),
+	}
+	primary, err := NewServicePrincipalTokenWithSecret(
+		*multiTenantCfg.PrimaryTenant(),
+		clientID,
+		resource,
+		&ServicePrincipalCertificateSecret{
+			PrivateKey:  privateKey,
+			Certificate: certificate,
+		},
+	)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create SPT for primary tenant: %v", err)
+	}
+	m.PrimaryToken = primary
+	for i := range auxTenants {
+		aux, err := NewServicePrincipalTokenWithSecret(
+			*auxTenants[i],
+			clientID,
+			resource,
+			&ServicePrincipalCertificateSecret{
+				PrivateKey:  privateKey,
+				Certificate: certificate,
+			},
+		)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create SPT for auxiliary tenant: %v", err)
+		}
+		m.AuxiliaryTokens[i] = aux
+	}
+	return &m, nil
+}
+
 // MSIAvailable returns true if the MSI endpoint is available for authentication.
 func MSIAvailable(ctx context.Context, sender Sender) bool {
 	resp, err := getMSIEndpoint(ctx, sender)
@@ -1196,3 +1329,8 @@ func MSIAvailable(ctx context.Context, sender Sender) bool {
 	}
 	return err == nil
 }
+
+// used for testing purposes
+var msiAvailableHook = func(ctx context.Context, sender Sender) bool {
+	return MSIAvailable(ctx, sender)
+}

vendor/github.com/Azure/go-autorest/autorest/adal/token_1.13.go

@@ -18,13 +18,12 @@ package adal
 
 import (
 	"context"
+	"fmt"
 	"net/http"
 	"time"
 )
 
 func getMSIEndpoint(ctx context.Context, sender Sender) (*http.Response, error) {
-	// this cannot fail, the return sig is due to legacy reasons
-	msiEndpoint, _ := GetMSIVMEndpoint()
 	tempCtx, cancel := context.WithTimeout(ctx, 500*time.Millisecond)
 	defer cancel()
 	// http.NewRequestWithContext() was added in Go 1.13
@@ -34,3 +33,43 @@ func getMSIEndpoint(ctx context.Context, sender Sender) (*http.Response, error)
 	req.URL.RawQuery = q.Encode()
 	return sender.Do(req)
 }
+
+// EnsureFreshWithContext will refresh the token if it will expire within the refresh window (as set by
+// RefreshWithin) and autoRefresh flag is on.  This method is safe for concurrent use.
+func (mt *MultiTenantServicePrincipalToken) EnsureFreshWithContext(ctx context.Context) error {
+	if err := mt.PrimaryToken.EnsureFreshWithContext(ctx); err != nil {
+		return fmt.Errorf("failed to refresh primary token: %w", err)
+	}
+	for _, aux := range mt.AuxiliaryTokens {
+		if err := aux.EnsureFreshWithContext(ctx); err != nil {
+			return fmt.Errorf("failed to refresh auxiliary token: %w", err)
+		}
+	}
+	return nil
+}
+
+// RefreshWithContext obtains a fresh token for the Service Principal.
+func (mt *MultiTenantServicePrincipalToken) RefreshWithContext(ctx context.Context) error {
+	if err := mt.PrimaryToken.RefreshWithContext(ctx); err != nil {
+		return fmt.Errorf("failed to refresh primary token: %w", err)
+	}
+	for _, aux := range mt.AuxiliaryTokens {
+		if err := aux.RefreshWithContext(ctx); err != nil {
+			return fmt.Errorf("failed to refresh auxiliary token: %w", err)
+		}
+	}
+	return nil
+}
+
+// RefreshExchangeWithContext refreshes the token, but for a different resource.
+func (mt *MultiTenantServicePrincipalToken) RefreshExchangeWithContext(ctx context.Context, resource string) error {
+	if err := mt.PrimaryToken.RefreshExchangeWithContext(ctx, resource); err != nil {
+		return fmt.Errorf("failed to refresh primary token: %w", err)
+	}
+	for _, aux := range mt.AuxiliaryTokens {
+		if err := aux.RefreshExchangeWithContext(ctx, resource); err != nil {
+			return fmt.Errorf("failed to refresh auxiliary token: %w", err)
+		}
+	}
+	return nil
+}

vendor/github.com/Azure/go-autorest/autorest/adal/token_legacy.go

@@ -23,8 +23,6 @@ import (
 )
 
 func getMSIEndpoint(ctx context.Context, sender Sender) (*http.Response, error) {
-	// this cannot fail, the return sig is due to legacy reasons
-	msiEndpoint, _ := GetMSIVMEndpoint()
 	tempCtx, cancel := context.WithTimeout(ctx, 500*time.Millisecond)
 	defer cancel()
 	req, _ := http.NewRequest(http.MethodGet, msiEndpoint, nil)
@@ -34,3 +32,43 @@ func getMSIEndpoint(ctx context.Context, sender Sender) (*http.Response, error)
 	req.URL.RawQuery = q.Encode()
 	return sender.Do(req)
 }
+
+// EnsureFreshWithContext will refresh the token if it will expire within the refresh window (as set by
+// RefreshWithin) and autoRefresh flag is on.  This method is safe for concurrent use.
+func (mt *MultiTenantServicePrincipalToken) EnsureFreshWithContext(ctx context.Context) error {
+	if err := mt.PrimaryToken.EnsureFreshWithContext(ctx); err != nil {
+		return err
+	}
+	for _, aux := range mt.AuxiliaryTokens {
+		if err := aux.EnsureFreshWithContext(ctx); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// RefreshWithContext obtains a fresh token for the Service Principal.
+func (mt *MultiTenantServicePrincipalToken) RefreshWithContext(ctx context.Context) error {
+	if err := mt.PrimaryToken.RefreshWithContext(ctx); err != nil {
+		return err
+	}
+	for _, aux := range mt.AuxiliaryTokens {
+		if err := aux.RefreshWithContext(ctx); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// RefreshExchangeWithContext refreshes the token, but for a different resource.
+func (mt *MultiTenantServicePrincipalToken) RefreshExchangeWithContext(ctx context.Context, resource string) error {
+	if err := mt.PrimaryToken.RefreshExchangeWithContext(ctx, resource); err != nil {
+		return err
+	}
+	for _, aux := range mt.AuxiliaryTokens {
+		if err := aux.RefreshExchangeWithContext(ctx, resource); err != nil {
+			return err
+		}
+	}
+	return nil
+}

vendor/github.com/Azure/go-autorest/autorest/azure/async.go

@@ -42,6 +42,52 @@ const (
 
 var pollingCodes = [...]int{http.StatusNoContent, http.StatusAccepted, http.StatusCreated, http.StatusOK}
 
+// FutureAPI contains the set of methods on the Future type.
+type FutureAPI interface {
+	// Response returns the last HTTP response.
+	Response() *http.Response
+
+	// Status returns the last status message of the operation.
+	Status() string
+
+	// PollingMethod returns the method used to monitor the status of the asynchronous operation.
+	PollingMethod() PollingMethodType
+
+	// DoneWithContext queries the service to see if the operation has completed.
+	DoneWithContext(context.Context, autorest.Sender) (bool, error)
+
+	// GetPollingDelay returns a duration the application should wait before checking
+	// the status of the asynchronous request and true; this value is returned from
+	// the service via the Retry-After response header.  If the header wasn't returned
+	// then the function returns the zero-value time.Duration and false.
+	GetPollingDelay() (time.Duration, bool)
+
+	// WaitForCompletionRef will return when one of the following conditions is met: the long
+	// running operation has completed, the provided context is cancelled, or the client's
+	// polling duration has been exceeded.  It will retry failed polling attempts based on
+	// the retry value defined in the client up to the maximum retry attempts.
+	// If no deadline is specified in the context then the client.PollingDuration will be
+	// used to determine if a default deadline should be used.
+	// If PollingDuration is greater than zero the value will be used as the context's timeout.
+	// If PollingDuration is zero then no default deadline will be used.
+	WaitForCompletionRef(context.Context, autorest.Client) error
+
+	// MarshalJSON implements the json.Marshaler interface.
+	MarshalJSON() ([]byte, error)
+
+	// MarshalJSON implements the json.Unmarshaler interface.
+	UnmarshalJSON([]byte) error
+
+	// PollingURL returns the URL used for retrieving the status of the long-running operation.
+	PollingURL() string
+
+	// GetResult should be called once polling has completed successfully.
+	// It makes the final GET call to retrieve the resultant payload.
+	GetResult(autorest.Sender) (*http.Response, error)
+}
+
+var _ FutureAPI = (*Future)(nil)
+
 // Future provides a mechanism to access the status and results of an asynchronous request.
 // Since futures are stateful they should be passed by value to avoid race conditions.
 type Future struct {

vendor/github.com/Azure/go-autorest/autorest/azure/azure.go

@@ -37,6 +37,9 @@ const (
 	// should be included in the response.
 	HeaderReturnClientID = "x-ms-return-client-request-id"
 
+	// HeaderContentType is the type of the content in the HTTP response.
+	HeaderContentType = "Content-Type"
+
 	// HeaderRequestID is the Azure extension header of the service generated request ID returned
 	// in the response.
 	HeaderRequestID = "x-ms-request-id"
@@ -89,54 +92,85 @@ func (se ServiceError) Error() string {
 
 // UnmarshalJSON implements the json.Unmarshaler interface for the ServiceError type.
 func (se *ServiceError) UnmarshalJSON(b []byte) error {
-	// per the OData v4 spec the details field must be an array of JSON objects.
-	// unfortunately not all services adhear to the spec and just return a single
-	// object instead of an array with one object.  so we have to perform some
-	// shenanigans to accommodate both cases.
 	// http://docs.oasis-open.org/odata/odata-json-format/v4.0/os/odata-json-format-v4.0-os.html#_Toc372793091
 
-	type serviceError1 struct {
+	type serviceErrorInternal struct {
 		Code           string                   `json:"code"`
 		Message        string                   `json:"message"`
-		Target         *string                  `json:"target"`
-		Details        []map[string]interface{} `json:"details"`
-		InnerError     map[string]interface{}   `json:"innererror"`
-		AdditionalInfo []map[string]interface{} `json:"additionalInfo"`
+		Target         *string                  `json:"target,omitempty"`
+		AdditionalInfo []map[string]interface{} `json:"additionalInfo,omitempty"`
+		// not all services conform to the OData v4 spec.
+		// the following fields are where we've seen discrepancies
+
+		// spec calls for []map[string]interface{} but have seen map[string]interface{}
+		Details interface{} `json:"details,omitempty"`
+
+		// spec calls for map[string]interface{} but have seen []map[string]interface{} and string
+		InnerError interface{} `json:"innererror,omitempty"`
 	}
 
-	type serviceError2 struct {
-		Code           string                   `json:"code"`
-		Message        string                   `json:"message"`
-		Target         *string                  `json:"target"`
-		Details        map[string]interface{}   `json:"details"`
-		InnerError     map[string]interface{}   `json:"innererror"`
-		AdditionalInfo []map[string]interface{} `json:"additionalInfo"`
+	sei := serviceErrorInternal{}
+	if err := json.Unmarshal(b, &sei); err != nil {
+		return err
 	}
 
-	se1 := serviceError1{}
-	err := json.Unmarshal(b, &se1)
-	if err == nil {
-		se.populate(se1.Code, se1.Message, se1.Target, se1.Details, se1.InnerError, se1.AdditionalInfo)
-		return nil
+	// copy the fields we know to be correct
+	se.AdditionalInfo = sei.AdditionalInfo
+	se.Code = sei.Code
+	se.Message = sei.Message
+	se.Target = sei.Target
+
+	// converts an []interface{} to []map[string]interface{}
+	arrayOfObjs := func(v interface{}) ([]map[string]interface{}, bool) {
+		arrayOf, ok := v.([]interface{})
+		if !ok {
+			return nil, false
+		}
+		final := []map[string]interface{}{}
+		for _, item := range arrayOf {
+			as, ok := item.(map[string]interface{})
+			if !ok {
+				return nil, false
+			}
+			final = append(final, as)
+		}
+		return final, true
 	}
 
-	se2 := serviceError2{}
-	err = json.Unmarshal(b, &se2)
-	if err == nil {
-		se.populate(se2.Code, se2.Message, se2.Target, nil, se2.InnerError, se2.AdditionalInfo)
-		se.Details = append(se.Details, se2.Details)
-		return nil
-	}
-	return err
-}
+	// convert the remaining fields, falling back to raw JSON if necessary
 
-func (se *ServiceError) populate(code, message string, target *string, details []map[string]interface{}, inner map[string]interface{}, additional []map[string]interface{}) {
-	se.Code = code
-	se.Message = message
-	se.Target = target
-	se.Details = details
-	se.InnerError = inner
-	se.AdditionalInfo = additional
+	if c, ok := arrayOfObjs(sei.Details); ok {
+		se.Details = c
+	} else if c, ok := sei.Details.(map[string]interface{}); ok {
+		se.Details = []map[string]interface{}{c}
+	} else if sei.Details != nil {
+		// stuff into Details
+		se.Details = []map[string]interface{}{
+			{"raw": sei.Details},
+		}
+	}
+
+	if c, ok := sei.InnerError.(map[string]interface{}); ok {
+		se.InnerError = c
+	} else if c, ok := arrayOfObjs(sei.InnerError); ok {
+		// if there's only one error extract it
+		if len(c) == 1 {
+			se.InnerError = c[0]
+		} else {
+			// multiple errors, stuff them into the value
+			se.InnerError = map[string]interface{}{
+				"multi": c,
+			}
+		}
+	} else if c, ok := sei.InnerError.(string); ok {
+		se.InnerError = map[string]interface{}{"error": c}
+	} else if sei.InnerError != nil {
+		// stuff into InnerError
+		se.InnerError = map[string]interface{}{
+			"raw": sei.InnerError,
+		}
+	}
+	return nil
 }
 
 // RequestError describes an error response returned by Azure service.
@@ -307,16 +341,30 @@ func WithErrorUnlessStatusCode(codes ...int) autorest.RespondDecorator {
 					// Check if error is unwrapped ServiceError
 					decoder := autorest.NewDecoder(encodedAs, bytes.NewReader(b.Bytes()))
 					if err := decoder.Decode(&e.ServiceError); err != nil {
-						return err
+						return fmt.Errorf("autorest/azure: error response cannot be parsed: %q error: %v", b.String(), err)
+					}
+
+					// for example, should the API return the literal value `null` as the response
+					if e.ServiceError == nil {
+						e.ServiceError = &ServiceError{
+							Code:    "Unknown",
+							Message: "Unknown service error",
+							Details: []map[string]interface{}{
+								{
+									"HttpResponse.Body": b.String(),
+								},
+							},
+						}
 					}
 				}
-				if e.ServiceError.Message == "" {
+
+				if e.ServiceError != nil && e.ServiceError.Message == "" {
 					// if we're here it means the returned error wasn't OData v4 compliant.
 					// try to unmarshal the body in hopes of getting something.
 					rawBody := map[string]interface{}{}
 					decoder := autorest.NewDecoder(encodedAs, bytes.NewReader(b.Bytes()))
 					if err := decoder.Decode(&rawBody); err != nil {
-						return err
+						return fmt.Errorf("autorest/azure: error response cannot be parsed: %q error: %v", b.String(), err)
 					}
 
 					e.ServiceError = &ServiceError{

vendor/github.com/Azure/go-autorest/autorest/client.go

@@ -17,6 +17,7 @@ package autorest
 import (
 	"bytes"
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -165,7 +166,8 @@ type Client struct {
 	// Setting this to zero will use the provided context to control the duration.
 	PollingDuration time.Duration
 
-	// RetryAttempts sets the default number of retry attempts for client.
+	// RetryAttempts sets the total number of times the client will attempt to make an HTTP request.
+	// Set the value to 1 to disable retries.  DO NOT set the value to less than 1.
 	RetryAttempts int
 
 	// RetryDuration sets the delay duration for retries.
@@ -259,6 +261,9 @@ func (c Client) Do(r *http.Request) (*http.Response, error) {
 		},
 	})
 	resp, err := SendWithSender(c.sender(tls.RenegotiateNever), r)
+	if resp == nil && err == nil {
+		err = errors.New("autorest: received nil response and error")
+	}
 	logger.Instance.WriteResponse(resp, logger.Filter{})
 	Respond(resp, c.ByInspecting())
 	return resp, err

vendor/github.com/Azure/go-autorest/autorest/date/go.mod

@@ -1,5 +0,0 @@
-module github.com/Azure/go-autorest/autorest/date
-
-go 1.12
-
-require github.com/Azure/go-autorest v14.2.0+incompatible

vendor/github.com/Azure/go-autorest/autorest/date/go.sum

@@ -1,2 +0,0 @@
-github.com/Azure/go-autorest v14.2.0+incompatible h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=
-github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=