Merge pull request #463 from ingvagabund/duplicates-uniformly

RemoveDuplicatePods: evict uniformly

.github/workflows/release.yaml

@@ -2,8 +2,8 @@ name: Release Charts
 
 on:
   push:
-    tags:
+    branches:
-      - chart-*
+      - release-*
 
 jobs:
   release:
@@ -11,20 +11,21 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
 
       - name: Configure Git
         run: |
           git config user.name "$GITHUB_ACTOR"
           git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
 
-      - name: Fetch history
+      - name: Install Helm
-        run: git fetch --prune --unshallow
+        uses: azure/setup-helm@v1
-
+        with:
-      - name: Add dependency chart repos
+          version: v3.4.0
-        run: |
-          helm repo add stable https://kubernetes-charts.storage.googleapis.com/
 
       - name: Run chart-releaser
-        uses: helm/chart-releaser-action@v1.0.0-rc.2
+        uses: helm/chart-releaser-action@v1.1.0
         env:
           CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          CR_RELEASE_NAME_TEMPLATE: "descheduler-helm-chart-{{ .Version }}"

Dockerfile

@@ -11,11 +11,13 @@
 # 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:1.14.4
+FROM golang:1.15.5
 
 WORKDIR /go/src/sigs.k8s.io/descheduler
 COPY . .
-RUN make
+ARG ARCH
+ARG VERSION
+RUN VERSION=${VERSION} make build.$ARCH
 
 FROM scratch
 

Makefile

@@ -14,15 +14,15 @@
 
 .PHONY: test
 
-# VERSION is currently based on the last commit
+# VERSION is based on a date stamp plus the last commit
-VERSION?=$(shell git describe --tags)
+VERSION?=v$(shell date +%Y%m%d)-$(shell git describe --tags --match "v*")
-COMMIT=$(shell git rev-parse HEAD)
 BUILD=$(shell date +%FT%T%z)
 LDFLAG_LOCATION=sigs.k8s.io/descheduler/cmd/descheduler/app
+ARCHS = amd64 arm64
 
-LDFLAGS=-ldflags "-X ${LDFLAG_LOCATION}.version=${VERSION} -X ${LDFLAG_LOCATION}.buildDate=${BUILD} -X ${LDFLAG_LOCATION}.gitCommit=${COMMIT}"
+LDFLAGS=-ldflags "-X ${LDFLAG_LOCATION}.version=${VERSION} -X ${LDFLAG_LOCATION}.buildDate=${BUILD}"
 
-GOLANGCI_VERSION := v1.15.0
+GOLANGCI_VERSION := v1.30.0
 HAS_GOLANGCI := $(shell ls _output/bin/golangci-lint)
 
 # REGISTRY is the container registry to push
@@ -48,23 +48,48 @@ all: build
 build:
 	CGO_ENABLED=0 go build ${LDFLAGS} -o _output/bin/descheduler sigs.k8s.io/descheduler/cmd/descheduler
 
+build.amd64:
+	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build ${LDFLAGS} -o _output/bin/descheduler sigs.k8s.io/descheduler/cmd/descheduler
+
+build.arm64:
+	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build ${LDFLAGS} -o _output/bin/descheduler sigs.k8s.io/descheduler/cmd/descheduler
+
 dev-image: build
 	docker build -f Dockerfile.dev -t $(IMAGE) .
 
 image:
-	docker build -t $(IMAGE) .
+	docker build --build-arg VERSION="$(VERSION)" --build-arg ARCH="amd64" -t $(IMAGE) .
 
-push-container-to-gcloud: image
+image.amd64:
+	docker build --build-arg VERSION="$(VERSION)" --build-arg ARCH="amd64" -t $(IMAGE)-amd64 .
+
+image.arm64:
+	docker build --build-arg VERSION="$(VERSION)" --build-arg ARCH="arm64" -t $(IMAGE)-arm64 .
+
+push: image
 	gcloud auth configure-docker
 	docker tag $(IMAGE) $(IMAGE_GCLOUD)
 	docker push $(IMAGE_GCLOUD)
 
-push: push-container-to-gcloud
+push-all: image.amd64 image.arm64
+	gcloud auth configure-docker
+	for arch in $(ARCHS); do \
+		docker tag $(IMAGE)-$${arch} $(IMAGE_GCLOUD)-$${arch} ;\
+		docker push $(IMAGE_GCLOUD)-$${arch} ;\
+	done
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create $(IMAGE_GCLOUD) $(addprefix --amend $(IMAGE_GCLOUD)-, $(ARCHS))
+	for arch in $(ARCHS); do \
+		DOCKER_CLI_EXPERIMENTAL=enabled docker manifest annotate --arch $${arch} $(IMAGE_GCLOUD) $(IMAGE_GCLOUD)-$${arch} ;\
+	done
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push $(IMAGE_GCLOUD) ;\
 
 clean:
 	rm -rf _output
 
-verify: verify-gofmt verify-vendor lint lint-chart
+verify: verify-gofmt verify-vendor lint lint-chart verify-spelling
+
+verify-spelling:
+	./hack/verify-spelling.sh
 
 verify-gofmt:
 	./hack/verify-gofmt.sh

README.md

@@ -1,9 +1,8 @@
 [![Go Report Card](https://goreportcard.com/badge/kubernetes-sigs/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
 
-## Introduction
-
 Scheduling in Kubernetes is the process of binding pending pods to nodes, and is performed by
 a component of Kubernetes called kube-scheduler. The scheduler's decisions, whether or where a
 pod can or can not be scheduled, are guided by its configurable policy which comprises of set of
@@ -23,6 +22,35 @@ Descheduler, based on its policy, finds pods that can be moved and evicts them.
 note, in current implementation, descheduler does not schedule replacement of evicted pods
 but relies on the default scheduler for that.
 
+Table of Contents
+=================
+
+  * [Quick Start](#quick-start)
+     * [Run As A Job](#run-as-a-job)
+     * [Run As A CronJob](#run-as-a-cronjob)
+     * [Install Using Helm](#install-using-helm)
+     * [Install Using Kustomize](#install-using-kustomize)
+  * [User Guide](#user-guide)
+  * [Policy and Strategies](#policy-and-strategies)
+     * [RemoveDuplicates](#removeduplicates)
+     * [LowNodeUtilization](#lownodeutilization)
+     * [RemovePodsViolatingInterPodAntiAffinity](#removepodsviolatinginterpodantiaffinity)
+     * [RemovePodsViolatingNodeAffinity](#removepodsviolatingnodeaffinity)
+     * [RemovePodsViolatingNodeTaints](#removepodsviolatingnodetaints)
+     * [RemovePodsViolatingTopologySpreadConstraint](#removepodsviolatingtopologyspreadconstraint)
+     * [RemovePodsHavingTooManyRestarts](#removepodshavingtoomanyrestarts)
+     * [PodLifeTime](#podlifetime)
+  * [Filter Pods](#filter-pods)
+     * [Namespace filtering](#namespace-filtering)
+     * [Priority filtering](#priority-filtering)
+  * [Pod Evictions](#pod-evictions)
+     * [Pod Disruption Budget (PDB)](#pod-disruption-budget-pdb)
+  * [Compatibility Matrix](#compatibility-matrix)
+  * [Getting Involved and Contributing](#getting-involved-and-contributing)
+     * [Communicating With Contributors](#communicating-with-contributors)
+  * [Roadmap](#roadmap)
+     * [Code of conduct](#code-of-conduct)
+
 ## Quick Start
 
 The descheduler can be run as a Job or CronJob inside of a k8s cluster. It has the
@@ -33,17 +61,39 @@ being evicted by itself or by the kubelet.
 ### Run As A Job
 
 ```
-kubectl create -f kubernetes/rbac.yaml
+kubectl create -f kubernetes/base/rbac.yaml
-kubectl create -f kubernetes/configmap.yaml
+kubectl create -f kubernetes/base/configmap.yaml
-kubectl create -f kubernetes/job.yaml
+kubectl create -f kubernetes/job/job.yaml
 ```
 
 ### Run As A CronJob
 
 ```
-kubectl create -f kubernetes/rbac.yaml
+kubectl create -f kubernetes/base/rbac.yaml
-kubectl create -f kubernetes/configmap.yaml
+kubectl create -f kubernetes/base/configmap.yaml
-kubectl create -f kubernetes/cronjob.yaml
+kubectl create -f kubernetes/cronjob/cronjob.yaml
+```
+
+### Install Using Helm
+
+Starting with release v0.18.0 there is an official helm chart that can be used to install the
+descheduler. See the [helm chart README](https://github.com/kubernetes-sigs/descheduler/blob/master/charts/descheduler/README.md) for detailed instructions.
+
+The descheduler helm chart is also listed on the [artifact hub](https://artifacthub.io/packages/helm/descheduler/descheduler).
+
+### Install Using Kustomize
+
+You can use kustomize to install descheduler.
+See the [resources | Kustomize](https://kubernetes-sigs.github.io/kustomize/api-reference/kustomization/resources/) for detailed instructions.
+
+Run As A Job
+```
+kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/job?ref=master' | kubectl apply -f -
+```
+
+Run As A CronJob
+```
+kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/cronjob?ref=master' | kubectl apply -f -
 ```
 
 ## User Guide
@@ -53,10 +103,25 @@ 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.
-Seven strategies `RemoveDuplicates`, `LowNodeUtilization`, `RemovePodsViolatingInterPodAntiAffinity`,
+Eight strategies `RemoveDuplicates`, `LowNodeUtilization`, `RemovePodsViolatingInterPodAntiAffinity`,
-`RemovePodsViolatingNodeAffinity`, `RemovePodsViolatingNodeTaints`, `RemovePodsHavingTooManyRestarts`, and `PodLifeTime`
+`RemovePodsViolatingNodeAffinity`, `RemovePodsViolatingNodeTaints`, `RemovePodsViolatingTopologySpreadConstraint`,
-are currently implemented. As part of the policy, the parameters associated with the strategies can be configured too.
+`RemovePodsHavingTooManyRestarts`, and `PodLifeTime` are currently implemented. As part of the policy, the
-By default, all strategies are enabled.
+parameters associated with the strategies can be configured too. By default, all strategies are enabled.
+
+The policy also includes common configuration for all the strategies:
+- `nodeSelector` - limiting the nodes which are processed
+- `evictLocalStoragePods` - allowing to evict pods with local storage
+- `maxNoOfPodsToEvictPerNode` - maximum number of pods evicted from each node (summed through all strategies)
+
+```yaml
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+nodeSelector: prod=dev
+evictLocalStoragePods: true
+maxNoOfPodsToEvictPerNode: 40
+strategies:
+  ...
+```
 
 ### RemoveDuplicates
 
@@ -70,7 +135,17 @@ are ready again, this strategy could be enabled to evict those duplicate pods.
 It provides one optional parameter, `ExcludeOwnerKinds`, which is a list of OwnerRef `Kind`s. If a pod
 has any of these `Kind`s listed as an `OwnerRef`, that pod will not be considered for eviction.
 
-```
+**Parameters:**
+
+|Name|Type|
+|---|---|
+|`excludeOwnerKinds`|list(string)|
+|`namespaces`|(see [namespace filtering](#namespace-filtering))|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+
+**Example:**
+```yaml
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
@@ -100,9 +175,20 @@ considered appropriately utilized and is not considered for eviction. The thresh
 can be configured for cpu, memory, and number of pods too in terms of percentage.
 
 These thresholds, `thresholds` and `targetThresholds`, could be tuned as per your cluster requirements.
-Here is an example of a policy for this strategy:
 
-```
+**Parameters:**
+
+|Name|Type|
+|---|---|
+|`thresholds`|map(string:int)|
+|`targetThresholds`|map(string:int)|
+|`numberOfNodes`|int|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+
+**Example:**
+
+```yaml
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
@@ -140,15 +226,24 @@ This strategy makes sure that pods violating interpod anti-affinity are removed
 if there is podA on a node and podB and podC (running on the same node) have anti-affinity rules which prohibit
 them to run on the same node, then podA will be evicted from the node so that podB and podC could run. This
 issue could happen, when the anti-affinity rules for podB and podC are created when they are already running on
-node. Currently, there are no parameters associated with this strategy. To disable this strategy, the
+node.
-policy should look like:
 
-```
+**Parameters:**
+
+|Name|Type|
+|---|---|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+|`namespaces`|(see [namespace filtering](#namespace-filtering))|
+
+**Example:**
+
+```yaml
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
   "RemovePodsViolatingInterPodAntiAffinity":
-     enabled: false
+     enabled: true
 ```
 
 ### RemovePodsViolatingNodeAffinity
@@ -169,9 +264,18 @@ of scheduling. Over time nodeA stops to satisfy the rule. When the strategy gets
 executed and there is another node available that satisfies the node affinity rule,
 podA gets evicted from nodeA.
 
-The policy file should look like:
+**Parameters:**
 
-```
+|Name|Type|
+|---|---|
+|`nodeAffinityType`|list(string)|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+|`namespaces`|(see [namespace filtering](#namespace-filtering))|
+
+**Example:**
+
+```yaml
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
@@ -187,9 +291,19 @@ strategies:
 This strategy makes sure that pods violating NoSchedule taints on nodes are removed. For example there is a
 pod "podA" with a toleration to tolerate a taint ``key=value:NoSchedule`` scheduled and running on the tainted
 node. If the node's taint is subsequently updated/removed, taint is no longer satisfied by its pods' tolerations
-and will be evicted. The policy file should look like:
+and will be evicted.
 
-````
+**Parameters:**
+
+|Name|Type|
+|---|---|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+|`namespaces`|(see [namespace filtering](#namespace-filtering))|
+
+**Example:**
+
+````yaml
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
@@ -197,11 +311,51 @@ strategies:
     enabled: true
 ````
 
+### RemovePodsViolatingTopologySpreadConstraint
+
+This strategy makes sure that pods violating [topology spread constraints](https://kubernetes.io/docs/concepts/workloads/pods/pod-topology-spread-constraints/)
+are evicted from nodes. Specifically, it tries to evict the minimum number of pods required to balance topology domains to within each constraint's `maxSkew`.
+This strategy requires k8s version 1.18 at a minimum.
+
+**Parameters:**
+
+|Name|Type|
+|---|---|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+|`namespaces`|(see [namespace filtering](#namespace-filtering))|
+
+**Example:**
+
+```yaml
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "RemovePodsViolatingTopologySpreadConstraint":
+     enabled: true
+```
+
+
 ### RemovePodsHavingTooManyRestarts
 
-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.
+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.
 
-```
+**Parameters:**
+
+|Name|Type|
+|---|---|
+|`podRestartThreshold`|int|
+|`includingInitContainers`|bool|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+|`namespaces`|(see [namespace filtering](#namespace-filtering))|
+
+**Example:**
+
+```yaml
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
@@ -215,18 +369,124 @@ strategies:
 
 ### PodLifeTime
 
-This strategy evicts pods that are older than `.strategies.PodLifeTime.params.maxPodLifeTimeSeconds` The policy
+This strategy evicts pods that are older than `maxPodLifeTimeSeconds`.
-file should look like:
 
-````
+You can also specify `podStatusPhases` to `only` evict pods with specific `StatusPhases`, currently this parameter is limited
+to `Running` and `Pending`.
+
+**Parameters:**
+
+|Name|Type|
+|---|---|
+|`maxPodLifeTimeSeconds`|int|
+|`podStatusPhases`|list(string)|
+|`thresholdPriority`|int (see [priority filtering](#priority-filtering))|
+|`thresholdPriorityClassName`|string (see [priority filtering](#priority-filtering))|
+|`namespaces`|(see [namespace filtering](#namespace-filtering))|
+
+**Example:**
+
+```yaml
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
   "PodLifeTime":
      enabled: true
      params:
-        maxPodLifeTimeSeconds: 86400
+       podLifeTime:
-````
+         maxPodLifeTimeSeconds: 86400
+         podStatusPhases:
+         - "Pending"
+```
+
+## Filter Pods
+
+### Namespace filtering
+
+The following strategies accept a `namespaces` parameter which allows to specify a list of including, resp. excluding namespaces:
+* `PodLifeTime`
+* `RemovePodsHavingTooManyRestarts`
+* `RemovePodsViolatingNodeTaints`
+* `RemovePodsViolatingNodeAffinity`
+* `RemovePodsViolatingInterPodAntiAffinity`
+* `RemoveDuplicates`
+* `RemovePodsViolatingTopologySpreadConstraint`
+
+For example:
+
+```yaml
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "PodLifeTime":
+     enabled: true
+     params:
+        podLifeTime:
+          maxPodLifeTimeSeconds: 86400
+        namespaces:
+          include:
+          - "namespace1"
+          - "namespace2"
+```
+
+In the examples `PodLifeTime` gets executed only over `namespace1` and `namespace2`.
+The similar holds for `exclude` field:
+
+```yaml
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "PodLifeTime":
+     enabled: true
+     params:
+        podLifeTime:
+          maxPodLifeTimeSeconds: 86400
+        namespaces:
+          exclude:
+          - "namespace1"
+          - "namespace2"
+```
+
+The strategy gets executed over all namespaces but `namespace1` and `namespace2`.
+
+It's not allowed to compute `include` with `exclude` field.
+
+### Priority filtering
+
+All strategies are able to configure a priority threshold, only pods under the threshold can be evicted. You can
+specify this threshold by setting `thresholdPriorityClassName`(setting the threshold to the value of the given
+priority class) or `thresholdPriority`(directly setting the threshold) parameters. By default, this threshold
+is set to the value of `system-cluster-critical` priority class.
+E.g.
+
+Setting `thresholdPriority`
+```yaml
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "PodLifeTime":
+     enabled: true
+     params:
+        podLifeTime:
+          maxPodLifeTimeSeconds: 86400
+        thresholdPriority: 10000
+```
+
+Setting `thresholdPriorityClassName`
+```yaml
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "PodLifeTime":
+     enabled: true
+     params:
+        podLifeTime:
+          maxPodLifeTimeSeconds: 86400
+        thresholdPriorityClassName: "priorityclass1"
+```
+
+Note that you can't configure both `thresholdPriority` and `thresholdPriorityClassName`, if the given priority class
+does not exist, descheduler won't create it and will throw an error.
 
 ## Pod Evictions
 
@@ -236,7 +496,7 @@ When the descheduler decides to evict pods from a node, it employs the following
 * Pods (static or mirrored pods or stand alone pods) not part of an RC, RS, Deployment or Job are
 never evicted because these pods won't be recreated.
 * Pods associated with DaemonSets are never evicted.
-* Pods with local storage are never evicted.
+* Pods with local storage are never evicted (unless `evictLocalStoragePods: true` is set)
 * In `LowNodeUtilization` and `RemovePodsViolatingInterPodAntiAffinity`, pods are evicted by their priority from low to high, and if they have same priority,
 best effort pods are evicted before burstable and guaranteed pods.
 * All types of pods with the annotation descheduler.alpha.kubernetes.io/evict are evicted. This
@@ -261,6 +521,8 @@ packages that it is compiled with.
 
 Descheduler  | Supported Kubernetes Version
 -------------|-----------------------------
+v0.20        | v1.20
+v0.19        | v1.19
 v0.18        | v1.18
 v0.10        | v1.17
 v0.4-v0.9    | v1.9+

charts/descheduler/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 name: descheduler
-version: 0.18.0
+version: 0.20.0
-appVersion: 0.18.0
+appVersion: 0.20.0
 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
@@ -12,5 +12,5 @@ icon: https://kubernetes.io/images/favicon.png
 sources:
 - https://github.com/kubernetes-sigs/descheduler
 maintainers:
-- name: stevehipwell
+- name: Kubernetes SIG Scheduling
-  email: steve.hipwell@github.com
+  email: kubernetes-sig-scheduling@googlegroups.com

charts/descheduler/README.md

@@ -6,12 +6,12 @@
 
 ```shell
 helm repo add descheduler https://kubernetes-sigs.github.io/descheduler/
-$ helm install descheduler/descheduler --name my-release
+helm install my-release --namespace kube-system descheduler/descheduler
 ```
 
 ## Introduction
 
-This chart bootstraps a [desheduler](https://github.com/kubernetes-sigs/descheduler/) cron job on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
+This chart bootstraps a [descheduler](https://github.com/kubernetes-sigs/descheduler/) cron job on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
 
 ## Prerequisites
 
@@ -22,7 +22,7 @@ This chart bootstraps a [desheduler](https://github.com/kubernetes-sigs/deschedu
 To install the chart with the release name `my-release`:
 
 ```shell
-helm install --name my-release descheduler/descheduler
+helm install --namespace kube-system my-release descheduler/descheduler
 ```
 
 The command deploys _descheduler_ on the Kubernetes cluster in the default configuration. The [configuration](#configuration) section lists the parameters that can be configured during installation.
@@ -43,17 +43,23 @@ The command removes all the Kubernetes components associated with the chart and
 
 The following table lists the configurable parameters of the _descheduler_ chart and their default values.
 
-| Parameter                      | Description                                                                                                           | Default                                                |
+| Parameter                      | Description                                                                                                           | Default                              |
-| ------------------------------ | --------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------ |
+| ------------------------------ | --------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
-| `image.repository`             | Docker repository to use                                                                                              | `us.gcr.io/k8s-artifacts-prod/descheduler/descheduler` |
+| `image.repository`             | Docker repository to use                                                                                              | `k8s.gcr.io/descheduler/descheduler` |
-| `image.tag`                    | Docker tag to use                                                                                                     | `v[chart appVersion]`                                              |
+| `image.tag`                    | Docker tag to use                                                                                                     | `v[chart appVersion]`                |
-| `image.pullPolicy`             | Docker image pull policy                                                                                              | `IfNotPresent`                                         |
+| `image.pullPolicy`             | Docker image pull policy                                                                                              | `IfNotPresent`                       |
-| `nameOverride`                 | String to partially override `descheduler.fullname` template (will prepend the release name)                          | `""`                                                   |
+| `nameOverride`                 | String to partially override `descheduler.fullname` template (will prepend the release name)                          | `""`                                 |
-| `fullnameOverride`             | String to fully override `descheduler.fullname` template                                                              | `""`                                                   |
+| `fullnameOverride`             | String to fully override `descheduler.fullname` template                                                              | `""`                                 |
-| `schedule`                     | The cron schedule to run the _descheduler_ job on                                                                     | `"*/2 * * * *"`                                        |
+| `schedule`                     | The cron schedule to run the _descheduler_ job on                                                                     | `"*/2 * * * *"`                      |
-| `cmdOptions`                   | The options to pass to the _descheduler_ command                                                                      | _see values.yaml_                                      |
+| `startingDeadlineSeconds`      | If set, configure `startingDeadlineSeconds` for the _descheduler_ job                                                 | `nil`                                |
-| `deschedulerPolicy.strategies` | The _descheduler_ strategies to apply                                                                                 | _see values.yaml_                                      |
+| `successfulJobsHistoryLimit`   | If set, configure `successfulJobsHistoryLimit` for the _descheduler_ job                                              | `nil`                                |
-| `priorityClassName`            | The name of the priority class to add to pods                                                                         | `system-cluster-critical`                              |
+| `failedJobsHistoryLimit`       | If set, configure `failedJobsHistoryLimit` for the _descheduler_ job                                                  | `nil`                                |
-| `rbac.create`                  | If `true`, create & use RBAC resources                                                                                | `true`                                                 |
+| `cmdOptions`                   | The options to pass to the _descheduler_ command                                                                      | _see values.yaml_                    |
-| `serviceAccount.create`        | If `true`, create a service account for the cron job                                                                  | `true`                                                 |
+| `deschedulerPolicy.strategies` | The _descheduler_ strategies to apply                                                                                 | _see values.yaml_                    |
-| `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`                                                  |
+| `priorityClassName`            | The name of the priority class to add to pods                                                                         | `system-cluster-critical`            |
+| `rbac.create`                  | If `true`, create & use RBAC resources                                                                                | `true`                               |
+| `podSecurityPolicy.create`     | If `true`, create PodSecurityPolicy                                                                                   | `true`                               |
+| `resources.cpuRequest`        | Descheduler container CPU request                                                                  | `500m`                               |
+| `resources.memoryRequest`        | Descheduler container memory request                                                                  | `256Mi`                               |
+| `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`                                |

charts/descheduler/templates/clusterrole.yaml

@@ -12,10 +12,23 @@ rules:
 - apiGroups: [""]
   resources: ["nodes"]
   verbs: ["get", "watch", "list"]
+- apiGroups: [""]
+  resources: ["namespaces"]
+  verbs: ["get", "list"]
 - apiGroups: [""]
   resources: ["pods"]
   verbs: ["get", "watch", "list", "delete"]
 - apiGroups: [""]
   resources: ["pods/eviction"]
   verbs: ["create"]
+- apiGroups: ["scheduling.k8s.io"]
+  resources: ["priorityclasses"]
+  verbs: ["get", "watch", "list"]
+{{- if .Values.podSecurityPolicy.create }}
+- apiGroups: ['policy']
+  resources: ['podsecuritypolicies']
+  verbs:     ['use']
+  resourceNames:
+  - {{ template "descheduler.fullname" . }}
+{{- end }}
 {{- end -}}

charts/descheduler/templates/cronjob.yaml

@@ -7,6 +7,15 @@ metadata:
 spec:
   schedule: {{ .Values.schedule | quote }}
   concurrencyPolicy: "Forbid"
+  {{- if .Values.startingDeadlineSeconds }}
+  startingDeadlineSeconds: {{ .Values.startingDeadlineSeconds }}
+  {{- end }}
+  {{- if .Values.successfulJobsHistoryLimit }}
+  successfulJobsHistoryLimit: {{ .Values.successfulJobsHistoryLimit }}
+  {{- end }}
+  {{- if .Values.failedJobsHistoryLimit }}
+  failedJobsHistoryLimit: {{ .Values.failedJobsHistoryLimit }}
+  {{- end }}
   jobTemplate:
     spec:
       template:
@@ -44,6 +53,8 @@ spec:
                 - {{ $value | quote }}
                 {{- end }}
                 {{- end }}
+              resources:
+                {{- toYaml .Values.resources | nindent 16 }}
               volumeMounts:
                 - mountPath: /policy-dir
                   name: policy-volume

charts/descheduler/templates/podsecuritypolicy.yaml

@@ -0,0 +1,38 @@
+{{- if .Values.podSecurityPolicy.create -}}
+apiVersion: policy/v1beta1
+kind: PodSecurityPolicy
+metadata:
+  name: {{ template "descheduler.fullname" . }}
+  annotations:
+    seccomp.security.alpha.kubernetes.io/allowedProfileNames: 'docker/default,runtime/default'
+    seccomp.security.alpha.kubernetes.io/defaultProfileName:  'runtime/default'
+spec:
+  privileged: false
+  allowPrivilegeEscalation: false
+  requiredDropCapabilities:
+    - ALL
+  volumes:
+    - 'configMap'
+    - 'secret'
+  hostNetwork: false
+  hostIPC: false
+  hostPID: false
+  runAsUser:
+    rule: 'MustRunAs'
+    ranges:
+      - min: 1
+        max: 65535
+  seLinux:
+    rule: 'RunAsAny'
+  supplementalGroups:
+    rule: 'MustRunAs'
+    ranges:
+      - min: 1
+        max: 65535
+  fsGroup:
+    rule: 'MustRunAs'
+    ranges:
+      - min: 1
+        max: 65535
+  readOnlyRootFilesystem: true
+{{- end -}}

charts/descheduler/values.yaml

@@ -3,15 +3,26 @@
 # Declare variables to be passed into your templates.
 
 image:
-  repository: us.gcr.io/k8s-artifacts-prod/descheduler/descheduler
+  repository: k8s.gcr.io/descheduler/descheduler
   # Overrides the image tag whose default is the chart version
   tag: ""
   pullPolicy: IfNotPresent
 
+resources:
+  requests:
+    cpu: 500m
+    memory: 256Mi
+  # limits:
+  #   cpu: 100m
+  #   memory: 128Mi
+
 nameOverride: ""
 fullnameOverride: ""
 
 schedule: "*/2 * * * *"
+#startingDeadlineSeconds: 200
+#successfulJobsHistoryLimit: 1
+#failedJobsHistoryLimit: 1
 
 cmdOptions:
   v: 3
@@ -51,6 +62,10 @@ rbac:
   # Specifies whether RBAC resources should be created
   create: true
 
+podSecurityPolicy:
+  # Specifies whether PodSecurityPolicy should be created.
+  create: true
+
 serviceAccount:
   # Specifies whether a ServiceAccount should be created
   create: true

cloudbuild.yaml

@@ -14,7 +14,7 @@ steps:
     - VERSION=$_GIT_TAG
     - BASE_REF=$_PULL_BASE_REF
     args:
-    - push
+    - push-all
 substitutions:
   # _GIT_TAG will be filled with a git-based tag for the image, of the form vYYYYMMDD-hash, and
   # can be used as a substitution

cmd/descheduler/app/options/options.go

@@ -18,44 +18,63 @@ limitations under the License.
 package options
 
 import (
+	"github.com/spf13/pflag"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	clientset "k8s.io/client-go/kubernetes"
 
-	// install the componentconfig api so we get its defaulting and conversion functions
+	"k8s.io/component-base/logs"
 	"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
 	"sigs.k8s.io/descheduler/pkg/apis/componentconfig/v1alpha1"
 	deschedulerscheme "sigs.k8s.io/descheduler/pkg/descheduler/scheme"
-
-	"github.com/spf13/pflag"
 )
 
 // DeschedulerServer configuration
 type DeschedulerServer struct {
 	componentconfig.DeschedulerConfiguration
 	Client clientset.Interface
+	Logs   *logs.Options
 }
 
 // NewDeschedulerServer creates a new DeschedulerServer with default parameters
-func NewDeschedulerServer() *DeschedulerServer {
+func NewDeschedulerServer() (*DeschedulerServer, error) {
-	versioned := v1alpha1.DeschedulerConfiguration{}
+	cfg, err := newDefaultComponentConfig()
-	deschedulerscheme.Scheme.Default(&versioned)
+	if err != nil {
-	cfg := componentconfig.DeschedulerConfiguration{}
+		return nil, err
-	deschedulerscheme.Scheme.Convert(versioned, &cfg, nil)
-	s := DeschedulerServer{
-		DeschedulerConfiguration: cfg,
 	}
-	return &s
+	return &DeschedulerServer{
+		DeschedulerConfiguration: *cfg,
+		Logs:                     logs.NewOptions(),
+	}, 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)
+	cfg := componentconfig.DeschedulerConfiguration{}
+	if err := deschedulerscheme.Scheme.Convert(&versionedCfg, &cfg, nil); err != nil {
+		return nil, err
+	}
+	return &cfg, nil
 }
 
 // AddFlags adds flags for a specific SchedulerServer to the specified FlagSet
 func (rs *DeschedulerServer) AddFlags(fs *pflag.FlagSet) {
+	fs.StringVar(&rs.Logging.Format, "logging-format", rs.Logging.Format, `Sets the log format. Permitted formats: "text", "json". Non-default formats don't honor these flags: --add-dir-header, --alsologtostderr, --log-backtrace-at, --log-dir, --log-file, --log-file-max-size, --logtostderr, --skip-headers, --skip-log-headers, --stderrthreshold, --log-flush-frequency.\nNon-default choices are currently alpha and subject to change without warning.`)
 	fs.DurationVar(&rs.DeschedulingInterval, "descheduling-interval", rs.DeschedulingInterval, "Time interval between two consecutive descheduler executions. Setting this value instructs the descheduler to run in a continuous loop at the interval specified.")
 	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, "Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
+	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, "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, "Enables evicting pods using local storage by descheduler")
+	fs.BoolVar(&rs.EvictLocalStoragePods, "evict-local-storage-pods", rs.EvictLocalStoragePods, "DEPRECATED: enables evicting pods using local storage by descheduler")
 }

cmd/descheduler/app/server.go

@@ -27,28 +27,35 @@ import (
 	"github.com/spf13/cobra"
 
 	aflag "k8s.io/component-base/cli/flag"
-	"k8s.io/component-base/logs"
 	"k8s.io/klog/v2"
 )
 
 // NewDeschedulerCommand creates a *cobra.Command object with default parameters
 func NewDeschedulerCommand(out io.Writer) *cobra.Command {
-	s := options.NewDeschedulerServer()
+	s, err := options.NewDeschedulerServer()
+
+	if err != nil {
+		klog.ErrorS(err, "unable to initialize server")
+	}
+
 	cmd := &cobra.Command{
 		Use:   "descheduler",
 		Short: "descheduler",
 		Long:  `The descheduler evicts pods which may be bound to less desired nodes`,
 		Run: func(cmd *cobra.Command, args []string) {
-			logs.InitLogs()
+			s.Logs.LogFormat = s.Logging.Format
-			defer logs.FlushLogs()
+			s.Logs.Apply()
+
+			if err := s.Validate(); err != nil {
+				klog.ErrorS(err, "failed to validate server configuration")
+			}
 			err := Run(s)
 			if err != nil {
-				klog.Errorf("%v", err)
+				klog.ErrorS(err, "descheduler server")
 			}
 		},
 	}
-	cmd.SetOutput(out)
+	cmd.SetOut(out)
-
 	flags := cmd.Flags()
 	flags.SetNormalizeFunc(aflag.WordSepNormalizeFunc)
 	flags.AddGoFlagSet(flag.CommandLine)

cmd/descheduler/app/version.go

@@ -18,6 +18,7 @@ package app
 
 import (
 	"fmt"
+	"regexp"
 	"runtime"
 	"strings"
 
@@ -25,9 +26,6 @@ import (
 )
 
 var (
-	// gitCommit is a constant representing the source version that
-	// generated this build. It should be set during build via -ldflags.
-	gitCommit string
 	// version is a constant representing the version tag that
 	// generated this build. It should be set during build via -ldflags.
 	version string
@@ -40,7 +38,6 @@ var (
 type Info struct {
 	Major      string `json:"major"`
 	Minor      string `json:"minor"`
-	GitCommit  string `json:"gitCommit"`
 	GitVersion string `json:"gitVersion"`
 	BuildDate  string `json:"buildDate"`
 	GoVersion  string `json:"goVersion"`
@@ -55,7 +52,6 @@ func Get() Info {
 	return Info{
 		Major:      majorVersion,
 		Minor:      minorVersion,
-		GitCommit:  gitCommit,
 		GitVersion: version,
 		BuildDate:  buildDate,
 		GoVersion:  runtime.Version(),
@@ -81,7 +77,18 @@ func splitVersion(version string) (string, string) {
 	if version == "" {
 		return "", ""
 	}
-	// A sample version would be of form v0.1.0-7-ge884046, so split at first '.' and
+
-	// then return 0 and 1+(+ appended to follow semver convention) for major and minor versions.
+	// Version from an automated container build environment for a tag. For example v20200521-v0.18.0.
-	return strings.Trim(strings.Split(version, ".")[0], "v"), strings.Split(version, ".")[1] + "+"
+	m1, _ := regexp.MatchString(`^v\d{8}-v\d+\.\d+\.\d+$`, version)
+
+	// Version from an automated container build environment(not a tag) or a local build. For example v20201009-v0.18.0-46-g939c1c0.
+	m2, _ := regexp.MatchString(`^v\d{8}-v\d+\.\d+\.\d+-\w+-\w+$`, version)
+
+	if m1 || m2 {
+		semVer := strings.Split(version, "-")[1]
+		return strings.Trim(strings.Split(semVer, ".")[0], "v"), strings.Split(semVer, ".")[1] + "+"
+	}
+
+	// Something went wrong
+	return "", ""
 }

cmd/descheduler/descheduler.go

@@ -17,10 +17,9 @@ limitations under the License.
 package main
 
 import (
-	"flag"
 	"fmt"
+	"k8s.io/component-base/logs"
 	"os"
-
 	"sigs.k8s.io/descheduler/cmd/descheduler/app"
 )
 
@@ -28,7 +27,10 @@ func main() {
 	out := os.Stdout
 	cmd := app.NewDeschedulerCommand(out)
 	cmd.AddCommand(app.NewVersionCommand())
-	flag.CommandLine.Parse([]string{})
+
+	logs.InitLogs()
+	defer logs.FlushLogs()
+
 	if err := cmd.Execute(); err != nil {
 		fmt.Println(err)
 		os.Exit(1)

docs/contributor-guide.md

@@ -3,10 +3,10 @@
 ## Required Tools
 
 - [Git](https://git-scm.com/downloads)
-- [Go 1.14+](https://golang.org/dl/)
+- [Go 1.15+](https://golang.org/dl/)
 - [Docker](https://docs.docker.com/install/)
 - [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl)
-- [kind](https://kind.sigs.k8s.io/)
+- [kind v0.9.0+](https://kind.sigs.k8s.io/)
 
 ## Build and Run
 
@@ -34,9 +34,10 @@ GOOS=linux make dev-image
 kind create cluster --config hack/kind_config.yaml
 kind load docker-image <image name>
 kind get kubeconfig > /tmp/admin.conf
+export KUBECONFIG=/tmp/admin.conf
 make test-unit
 make test-e2e
 ```
 
 ### Miscellaneous
-See the [hack directory](https://github.com/kubernetes-sigs/descheduler/tree/master/hack) for additional tools and scripts used for developing the descheduler.
+See the [hack directory](https://github.com/kubernetes-sigs/descheduler/tree/master/hack) for additional tools and scripts used for developing the descheduler.

docs/release-guide.md

@@ -7,7 +7,7 @@
 1. Make sure your repo is clean by git's standards
 2. Create a release branch `git checkout -b release-1.18` (not required for patch releases)
 3. Push the release branch to the descheuler repo and ensure branch protection is enabled (not required for patch releases)
-4. Tag the repository and push the tag `VERSION=v0.18.0 git tag -m $VERSION $VERSION; git push origin $VERSION`
+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)
 7. Publish release
@@ -18,15 +18,20 @@
 1. Make sure your repo is clean by git's standards
 2. Create a release branch `git checkout -b release-1.18` (not required for patch releases)
 3. Push the release branch to the descheuler repo and ensure branch protection is enabled (not required for patch releases)
-4. Tag the repository and push the tag `VERSION=v0.18.0 git tag -m $VERSION $VERSION; git push origin $VERSION`
+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. 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`
+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)
 9. Publish release
 10. Email `kubernetes-sig-scheduling@googlegroups.com` to announce the release
 
 ### Notes
+It's important to create the tag on the master branch after creating the release-* branch so that the [Helm releaser-action](#helm-chart) can work.
+It compares the changes in the action-triggering branch to the latest tag on that branch, so if you tag before creating the new branch there
+will be nothing to compare and it will fail (creating a new release branch usually involves no code changes). For this same reason, you should
+also tag patch releases (on the release-* branch) *after* pushing changes (if those changes involve bumping the Helm chart version).
+
 See [post-descheduler-push-images dashboard](https://testgrid.k8s.io/sig-scheduling#post-descheduler-push-images) for staging registry image build job status.
 
 View the descheduler staging registry using [this URL](https://console.cloud.google.com/gcr/images/k8s-staging-descheduler/GLOBAL/descheduler) in a web browser
@@ -53,17 +58,17 @@ docker pull gcr.io/k8s-staging-descheduler/descheduler:v20200206-0.9.0-94-ge2a23
 ```
 
 ## Helm Chart
-Helm chart releases are managed by a separate set of git tags that are prefixed with `chart-*`. Example git tag name is `chart-0.18.0`. Released versions of the
+Helm chart releases are managed by a separate set of git tags that are prefixed with `descheduler-helm-chart-*`. Example git tag name is `descheduler-helm-chart-0.18.0`.
-helm charts are stored in the `gh-pages` branch of this repo. The [chart-releaser-action GitHub Action](https://github.com/helm/chart-releaser-action) is setup to
+Released versions of the helm charts are stored in the `gh-pages` branch of this repo. The [chart-releaser-action GitHub Action](https://github.com/helm/chart-releaser-action)
-build and push the helm charts to the `gh-pages` branch when a `chart-*` git tag is created.
+is setup to build and push the helm charts to the `gh-pages` branch when changes are pushed to a `release-*` branch.
 
-The major and minor version of the chart matches the descheduler major and minor versions. For example descheduler helm chart version chart-0.18.0 corresponds
+The major and minor version of the chart matches the descheduler major and minor versions. For example descheduler helm chart version helm-descheduler-chart-0.18.0 corresponds
 to descheduler version v0.18.0. The patch version of the descheduler helm chart and the patcher version of the descheduler will not necessarily match. The patch
 version of the descheduler helm chart is used to version changes specific to the helm chart.
 
-1. Merge all helm chart changes into the appropriate release branch(i.e. release-1.18)
+1. Merge all helm chart changes into the master branch before the release is tagged/cut
    1. Ensure that `appVersion` in file `charts/descheduler/Chart.yaml` matches the descheduler version(no `v` prefix)
    2. Ensure that `version` in file `charts/descheduler/Chart.yaml` has been incremented. This is the chart version.
 2. Make sure your repo is clean by git's standards
-3. Create the tag and push it `git checkout release-1.18; CHART_VERSION=chart-0.18.0; git tag $CHART_VERSION; git push origin $CHART_VERSION`
+3. Follow the release-branch or patch release tagging pattern from the above section.
-4. Verify the new helm artifact has been successfully pushed to the `gh-pages` branch
+4. Verify the new helm artifact has been successfully pushed to the `gh-pages` branch

docs/user-guide.md

@@ -1,9 +1,17 @@
 # User Guide
 
-Starting with descheduler release v0.10.0 container images are available in these container registries.
+Starting with descheduler release v0.10.0 container images are available in the official k8s container registry.
-* `asia.gcr.io/k8s-artifacts-prod/descheduler/descheduler`
+* `k8s.gcr.io/descheduler/descheduler`
-* `eu.gcr.io/k8s-artifacts-prod/descheduler/descheduler`
+
-* `us.gcr.io/k8s-artifacts-prod/descheduler/descheduler`
+Also, starting with descheduler release v0.20.0 multi-arch container images are provided. Currently AMD64 and ARM64
+container images are provided. Multi-arch container images cannot be pulled by [kind](https://kind.sigs.k8s.io) from
+a registry. Therefore starting with descheduler release v0.20.0 use the below process to download the official descheduler
+image into a kind cluster.
+```
+kind create cluster
+docker pull k8s.gcr.io/descheduler/descheduler:v0.20.0
+kind load docker-image k8s.gcr.io/descheduler/descheduler:v0.20.0
+```
 
 ## Policy Configuration Examples
 The [examples](https://github.com/kubernetes-sigs/descheduler/tree/master/examples) directory has descheduler policy configuration examples.
@@ -23,11 +31,11 @@ Available Commands:
   version     Version of descheduler
 
 Flags:
-      --add-dir-header                   If true, adds the file directory to the header
+      --add-dir-header                   If true, adds the file directory to the header of the log messages
       --alsologtostderr                  log to standard error as well as files
       --descheduling-interval duration   Time interval between two consecutive descheduler executions. Setting this value instructs the descheduler to run in a continuous loop at the interval specified.
       --dry-run                          execute descheduler in dry run mode.
-      --evict-local-storage-pods         Enables evicting pods using local storage by descheduler
+      --evict-local-storage-pods         DEPRECATED: enables evicting pods using local storage by descheduler
   -h, --help                             help for descheduler
       --kubeconfig string                File with  kube configuration.
       --log-backtrace-at traceLocation   when logging hits line file:N, emit a stack trace (default :0)
@@ -36,8 +44,8 @@ Flags:
       --log-file-max-size uint           Defines the maximum size a log file can grow to. Unit is megabytes. If the value is 0, the maximum file size is unlimited. (default 1800)
       --log-flush-frequency duration     Maximum number of seconds between log flushes (default 5s)
       --logtostderr                      log to standard error instead of files (default true)
-      --max-pods-to-evict-per-node int   Limits the maximum number of pods to be evicted per node by descheduler
+      --max-pods-to-evict-per-node int   DEPRECATED: limits the maximum number of pods to be evicted per node by descheduler
-      --node-selector string             Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)
+      --node-selector string             DEPRECATED: selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)
       --policy-config-file string        File with descheduler policy configuration.
       --skip-headers                     If true, avoid header prefixes in the log messages
       --skip-log-headers                 If true, avoid headers when opening log files
@@ -71,20 +79,40 @@ This policy configuration file ensures that pods created more than 7 days ago ar
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
-  "LowNodeUtilization":
-    enabled: false
-  "RemoveDuplicates":
-    enabled: false
-  "RemovePodsViolatingInterPodAntiAffinity":
-    enabled: false
-  "RemovePodsViolatingNodeAffinity":
-    enabled: false
-  "RemovePodsViolatingNodeTaints":
-    enabled: false
-  "RemovePodsHavingTooManyRestarts":
-    enabled: false
   "PodLifeTime":
     enabled: true
     params:
       maxPodLifeTimeSeconds: 604800 # pods run for a maximum of 7 days
 ```
+
+### Balance Cluster By Node Memory Utilization
+
+If your cluster has been running for a long period of time, you may find that the resource utilization is not very
+balanced. The `LowNodeUtilization` strategy can be used to rebalance your cluster based on `cpu`, `memory`
+or `number of pods`.
+
+Using the following policy configuration file, descheduler will rebalance the cluster based on memory by evicting pods
+from nodes with memory utilization over 70% to nodes with memory utilization below 20%.
+
+```
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "LowNodeUtilization":
+    enabled: true
+    params:
+      nodeResourceUtilizationThresholds:
+        thresholds:
+          "memory": 20
+        targetThresholds:
+          "memory": 70
+```
+
+### Autoheal Node Problems
+Descheduler's `RemovePodsViolatingNodeTaints` strategy can be combined with
+[Node Problem Detector](https://github.com/kubernetes/node-problem-detector/) and
+[Cluster Autoscaler](https://github.com/kubernetes/autoscaler/tree/master/cluster-autoscaler) to automatically remove
+Nodes which have problems. Node Problem Detector can detect specific Node problems and taint any Nodes which have those
+problems. The Descheduler will then deschedule workloads from those Nodes. Finally, if the descheduled Node's resource
+allocation falls below the Cluster Autoscaler's scale down threshold, the Node will become a scale down candidate
+and can be removed by Cluster Autoscaler. These three components form an autohealing cycle for Node problems.

examples/low-node-utilization.yml

@@ -0,0 +1,12 @@
+---
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "LowNodeUtilization":
+    enabled: true
+    params:
+      nodeResourceUtilizationThresholds:
+        thresholds:
+          "memory": 20
+        targetThresholds:
+          "memory": 70

examples/pod-life-time.yml

@@ -2,19 +2,8 @@
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
-  "LowNodeUtilization":
-    enabled: false
-  "RemoveDuplicates":
-    enabled: false
-  "RemovePodsViolatingInterPodAntiAffinity":
-    enabled: false
-  "RemovePodsViolatingNodeAffinity":
-    enabled: false
-  "RemovePodsViolatingNodeTaints":
-    enabled: false
-  "RemovePodsHavingTooManyRestarts":
-    enabled: false
   "PodLifeTime":
     enabled: true
     params:
-      maxPodLifeTimeSeconds: 604800 # 7 days
+      podLifeTime:
+        maxPodLifeTimeSeconds: 604800 # 7 days

go.mod

@@ -1,15 +1,17 @@
 module sigs.k8s.io/descheduler
 
-go 1.14
+go 1.15
 
 require (
+	github.com/client9/misspell v0.3.4
 	github.com/spf13/cobra v0.0.5
 	github.com/spf13/pflag v1.0.5
-	k8s.io/api v0.18.4
+	k8s.io/api v0.20.0
-	k8s.io/apimachinery v0.18.4
+	k8s.io/apimachinery v0.20.0
-	k8s.io/apiserver v0.18.4
+	k8s.io/apiserver v0.20.0
-	k8s.io/client-go v0.18.4
+	k8s.io/client-go v0.20.0
-	k8s.io/code-generator v0.18.4
+	k8s.io/code-generator v0.20.0
-	k8s.io/component-base v0.18.4
+	k8s.io/component-base v0.20.0
-	k8s.io/klog/v2 v2.0.0
+	k8s.io/component-helpers v0.20.0
+	k8s.io/klog/v2 v2.4.0
 )

go.sum

@@ -2,36 +2,68 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.38.0 h1:ROfEUZz+Gh5pa62DJWXSaonyu3StP6EA6lPEXPI6mCo=
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0 h1:3ithwDMr7/3vpAMXiH+ZQnYbuIsh+OPhUPMFC9enmn0=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
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+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/client9/misspell v0.3.4 h1:ta993UF76GwbvJcIo3Y68y/M3WxlpEHPWIGDkJYwzJI=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
@@ -42,7 +74,7 @@ github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3Ee
 github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
-github.com/coreos/pkg v0.0.0-20180108230652-97fdf19511ea/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
+github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -50,8 +82,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
-github.com/docker/docker v0.7.3-0.20190327010347-be7ac8be2ae0/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/spdystream v0.0.0-20160310174837-449fdfce4d96/go.mod h1:Qh8CwZgvJUkLughtfhJv5dyTYa91l1fOUCrgjqmcifM=
+github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
 github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
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@@ -60,29 +92,36 @@ github.com/emicklei/go-restful v2.9.5+incompatible h1:spTtZBk5DYEvbxMVutUuTyh1Ao
 github.com/emicklei/go-restful v2.9.5+incompatible/go.mod h1:otzb+WCGbkyDHkqmQmT5YD2WR4BBwUdeQoFo8l/7tVs=
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@@ -132,6 +202,7 @@ github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ
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@@ -139,23 +210,26 @@ github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANyt
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@@ -164,8 +238,10 @@ github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaO
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@@ -188,22 +264,30 @@ github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/9
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@@ -225,30 +309,71 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
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-k8s.io/api v0.18.4 h1:8x49nBRxuXGUlDlwlWd3RMY1SayZrzFfxea3UZSkFw4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
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+k8s.io/api v0.20.0 h1:WwrYoZNM1W1aQEbyl8HNG+oWGzLpZQBlcerS9BQw9yI=
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-k8s.io/apiserver v0.18.4 h1:pn1jSQkfboPSirZopkVpEdLW4FcQLnYMaIY8LFxxj30=
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-k8s.io/client-go v0.18.4 h1:un55V1Q/B3JO3A76eS0kUSywgGK/WR3BQ8fHQjNa6Zc=
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-k8s.io/client-go v0.18.4/go.mod h1:f5sXwL4yAZRkAtzOxRWUhA/N8XzGCb+nPZI8PfobZ9g=
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-k8s.io/code-generator v0.18.4/go.mod h1:TgNEVx9hCyPGpdtCWA34olQYLkh3ok9ar7XfSsr8b6c=
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-k8s.io/component-base v0.18.4 h1:Kr53Fp1iCGNsl9Uv4VcRvLy7YyIqi9oaJOQ7SXtKI98=
+k8s.io/code-generator v0.20.0 h1:c8JaABvEEZPDE8MICTOtveHX2axchl+EptM+o4OGvbg=
-k8s.io/component-base v0.18.4/go.mod h1:7jr/Ef5PGmKwQhyAz/pjByxJbC58mhKAhiaDu0vXfPk=
+k8s.io/code-generator v0.20.0/go.mod h1:UsqdF+VX4PU2g46NC2JRs4gc+IfrctnwHb76RNbWHJg=
-k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/component-base v0.20.0 h1:BXGL8iitIQD+0NgW49UsM7MraNUUGDU3FBmrfUAtmVQ=
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-k8s.io/gengo v0.0.0-20200114144118-36b2048a9120/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
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-k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
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-k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
+k8s.io/gengo v0.0.0-20201113003025-83324d819ded h1:JApXBKYyB7l9xx+DK7/+mFjC7A9Bt5A93FPvFD0HIFE=
-k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
+k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0 h1:Foj74zO6RbjjP4hBEKjnYtjjAhGg4jNynUdYF6fJrok=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
-k8s.io/kube-openapi v0.0.0-20200410145947-61e04a5be9a6 h1:Oh3Mzx5pJ+yIumsAD0MOECPVeXsVot0UkiaCGVyfGQY=
+k8s.io/klog/v2 v2.2.0 h1:XRvcwJozkgZ1UQJmfMGpvRthQHOvihEhYtDfAaxMz/A=
-k8s.io/kube-openapi v0.0.0-20200410145947-61e04a5be9a6/go.mod h1:GRQhZsXIAJ1xR0C9bd8UpWHZ5plfAS9fzPjJuQ6JL3E=
+k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
-k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89 h1:d4vVOjXm687F1iLSP2q3lyPPuyvTUt3aVoBpi2DqRsU=
+k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
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+k8s.io/klog/v2 v2.4.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
-sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.7/go.mod h1:PHgbrJT7lCHcxMU+mDHEm+nx46H4zuuHZkDP6icnhu0=
+k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd h1:sOHNzJIkytDF6qadMNKhhDRpc6ODik8lVC6nOur7B2c=
-sigs.k8s.io/structured-merge-diff/v3 v3.0.0-20200116222232-67a7b8c61874/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
+k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd/go.mod h1:WOJ3KddDSol4tAGcJo0Tvi+dK12EcqSLqcWsryKMpfM=
-sigs.k8s.io/structured-merge-diff/v3 v3.0.0 h1:dOmIZBMfhcHS09XZkMyUgkq5trg3/jRyJYFZUiaOp8E=
+k8s.io/utils v0.0.0-20201110183641-67b214c5f920 h1:CbnUZsM497iRC5QMVkHwyl8s2tB3g7yaSHkYPkpgelw=
-sigs.k8s.io/structured-merge-diff/v3 v3.0.0/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
+k8s.io/utils v0.0.0-20201110183641-67b214c5f920/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.14/go.mod h1:LEScyzhFmoF5pso/YSeBstl57mOzx9xlU9n85RGrDQg=
+sigs.k8s.io/structured-merge-diff/v4 v4.0.2 h1:YHQV7Dajm86OuqnIR6zAelnDWBRjo+YhYV9PmGrh1s8=
+sigs.k8s.io/structured-merge-diff/v4 v4.0.2/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

hack/.spelling_failures

@@ -0,0 +1,6 @@
+BUILD
+CHANGELOG
+OWNERS
+go.mod
+go.sum
+vendor/

hack/kind_config.yaml

@@ -1,5 +1,5 @@
 kind: Cluster
-apiVersion: kind.sigs.k8s.io/v1alpha3
+apiVersion: kind.x-k8s.io/v1alpha4
 nodes:
 - role: control-plane
 - role: worker

hack/tools.go

@@ -19,4 +19,7 @@ limitations under the License.
 // This package imports things required by build scripts, to force `go mod` to see them as dependencies
 package tools
 
-import _ "k8s.io/code-generator"
+import (
+	_ "github.com/client9/misspell/cmd/misspell"
+	_ "k8s.io/code-generator"
+)

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 'go1.2|go1.3|go1.4|go1.5|go1.6|go1.7|go1.8|go1.9|go1.10|go1.11|go1.12|go1.13|go1.14') ]]; then
+if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.13|go1.14|go1.15') ]]; then
   echo "Unknown go version '${GO_VERSION[2]}', skipping gofmt."
   exit 1
 fi

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 'go1.2|go1.3|go1.4|go1.5|go1.6|go1.7|go1.8|go1.9|go1.10|go1.11|go1.12|go1.13|go1.14') ]]; then
+if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.13|go1.14|go1.15') ]]; then
   echo "Unknown go version '${GO_VERSION[2]}', skipping gofmt."
   exit 1
 fi

hack/verify-spelling.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# Copyright 2018 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.
+
+# This script checks commonly misspelled English words in all files in the
+# working directory by client9/misspell package.
+# Usage: `hack/verify-spelling.sh`.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+export KUBE_ROOT
+source "${KUBE_ROOT}/hack/lib/init.sh"
+
+# Ensure that we find the binaries we build before anything else.
+export GOBIN="${OS_OUTPUT_BINPATH}"
+PATH="${GOBIN}:${PATH}"
+
+# Install tools we need
+pushd "${KUBE_ROOT}" >/dev/null
+  GO111MODULE=on go install github.com/client9/misspell/cmd/misspell
+popd >/dev/null
+
+# Spell checking
+# All the skipping files are defined in hack/.spelling_failures
+skipping_file="${KUBE_ROOT}/hack/.spelling_failures"
+failing_packages=$(sed "s| | -e |g" "${skipping_file}")
+git ls-files | grep -v -e "${failing_packages}" | xargs misspell -i "Creater,creater,ect" -error -o stderr

kubernetes/base/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - configmap.yaml
+  - rbac.yaml

kubernetes/base/rbac.yaml

@@ -3,7 +3,6 @@ kind: ClusterRole
 apiVersion: rbac.authorization.k8s.io/v1
 metadata:
   name: descheduler-cluster-role
-  namespace: kube-system
 rules:
 - apiGroups: [""]
   resources: ["events"]
@@ -11,12 +10,18 @@ rules:
 - apiGroups: [""]
   resources: ["nodes"]
   verbs: ["get", "watch", "list"]
+- apiGroups: [""]
+  resources: ["namespaces"]
+  verbs: ["get", "list"]
 - apiGroups: [""]
   resources: ["pods"]
   verbs: ["get", "watch", "list", "delete"]
 - apiGroups: [""]
   resources: ["pods/eviction"]
   verbs: ["create"]
+- apiGroups: ["scheduling.k8s.io"]
+  resources: ["priorityclasses"]
+  verbs: ["get", "watch", "list"]
 ---
 apiVersion: v1
 kind: ServiceAccount

kubernetes/cronjob/cronjob.yaml

@@ -16,7 +16,7 @@ spec:
           priorityClassName: system-cluster-critical
           containers:
           - name: descheduler
-            image: us.gcr.io/k8s-artifacts-prod/descheduler/descheduler:v0.18.0
+            image: k8s.gcr.io/descheduler/descheduler:v0.20.0
             volumeMounts:
             - mountPath: /policy-dir
               name: policy-volume
@@ -27,6 +27,10 @@ spec:
               - "/policy-dir/policy.yaml"
               - "--v"
               - "3"
+            resources:
+              requests:
+                cpu: "500m"
+                memory: "256Mi"
           restartPolicy: "Never"
           serviceAccountName: descheduler-sa
           volumes:

kubernetes/cronjob/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - ../base
+  - cronjob.yaml

kubernetes/job/job.yaml

@@ -14,7 +14,7 @@ spec:
       priorityClassName: system-cluster-critical
       containers:
         - name: descheduler
-          image: us.gcr.io/k8s-artifacts-prod/descheduler/descheduler:v0.18.0
+          image: k8s.gcr.io/descheduler/descheduler:v0.20.0
           volumeMounts:
           - mountPath: /policy-dir
             name: policy-volume
@@ -25,6 +25,10 @@ spec:
             - "/policy-dir/policy.yaml"
             - "--v"
             - "3"
+          resources:
+            requests:
+              cpu: "500m"
+              memory: "256Mi"
       restartPolicy: "Never"
       serviceAccountName: descheduler-sa
       volumes:

kubernetes/job/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - ../base
+  - job.yaml

pkg/api/register.go

@@ -19,8 +19,6 @@ package api
 import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
-
-	"sigs.k8s.io/descheduler/pkg/descheduler/scheme"
 )
 
 var (
@@ -35,12 +33,6 @@ const GroupName = "descheduler"
 // SchemeGroupVersion is group version used to register these objects
 var SchemeGroupVersion = schema.GroupVersion{Group: GroupName, Version: runtime.APIVersionInternal}
 
-func init() {
-	if err := addKnownTypes(scheme.Scheme); err != nil {
-		panic(err)
-	}
-}
-
 // Kind takes an unqualified kind and returns a Group qualified GroupKind
 func Kind(kind string) schema.GroupKind {
 	return SchemeGroupVersion.WithKind(kind).GroupKind()

pkg/api/types.go

@@ -28,6 +28,15 @@ type DeschedulerPolicy struct {
 
 	// Strategies
 	Strategies StrategyList
+
+	// NodeSelector for a set of nodes to operate over
+	NodeSelector *string
+
+	// EvictLocalStoragePods allows pods using local storage to be evicted.
+	EvictLocalStoragePods *bool
+
+	// MaxNoOfPodsToEvictPerNode restricts maximum of pods to be evicted per node.
+	MaxNoOfPodsToEvictPerNode *int
 }
 
 type StrategyName string
@@ -44,13 +53,25 @@ type DeschedulerStrategy struct {
 	Params *StrategyParameters
 }
 
-// Only one of its members may be specified
+// Namespaces carries a list of included/excluded namespaces
+// for which a given strategy is applicable
+type Namespaces struct {
+	Include []string
+	Exclude []string
+}
+
+// Besides Namespaces only one of its members may be specified
+// TODO(jchaloup): move Namespaces ThresholdPriority and ThresholdPriorityClassName to individual strategies
+//  once the policy version is bumped to v1alpha2
 type StrategyParameters struct {
 	NodeResourceUtilizationThresholds *NodeResourceUtilizationThresholds
 	NodeAffinityType                  []string
 	PodsHavingTooManyRestarts         *PodsHavingTooManyRestarts
-	MaxPodLifeTimeSeconds             *uint
+	PodLifeTime                       *PodLifeTime
 	RemoveDuplicates                  *RemoveDuplicates
+	Namespaces                        *Namespaces
+	ThresholdPriority                 *int32
+	ThresholdPriorityClassName        string
 }
 
 type Percentage float64
@@ -70,3 +91,8 @@ type PodsHavingTooManyRestarts struct {
 type RemoveDuplicates struct {
 	ExcludeOwnerKinds []string
 }
+
+type PodLifeTime struct {
+	MaxPodLifeTimeSeconds *uint
+	PodStatusPhases       []string
+}

pkg/api/v1alpha1/types.go

@@ -28,6 +28,15 @@ type DeschedulerPolicy struct {
 
 	// Strategies
 	Strategies StrategyList `json:"strategies,omitempty"`
+
+	// NodeSelector for a set of nodes to operate over
+	NodeSelector *string `json:"nodeSelector,omitempty"`
+
+	// EvictLocalStoragePods allows pods using local storage to be evicted.
+	EvictLocalStoragePods *bool `json:"evictLocalStoragePods,omitempty"`
+
+	// MaxNoOfPodsToEvictPerNode restricts maximum of pods to be evicted per node.
+	MaxNoOfPodsToEvictPerNode *int `json:"maxNoOfPodsToEvictPerNode,omitempty"`
 }
 
 type StrategyName string
@@ -44,13 +53,23 @@ type DeschedulerStrategy struct {
 	Params *StrategyParameters `json:"params,omitempty"`
 }
 
-// Only one of its members may be specified
+// Namespaces carries a list of included/excluded namespaces
+// for which a given strategy is applicable.
+type Namespaces struct {
+	Include []string `json:"include"`
+	Exclude []string `json:"exclude"`
+}
+
+// Besides Namespaces ThresholdPriority and ThresholdPriorityClassName only one of its members may be specified
 type StrategyParameters struct {
 	NodeResourceUtilizationThresholds *NodeResourceUtilizationThresholds `json:"nodeResourceUtilizationThresholds,omitempty"`
 	NodeAffinityType                  []string                           `json:"nodeAffinityType,omitempty"`
 	PodsHavingTooManyRestarts         *PodsHavingTooManyRestarts         `json:"podsHavingTooManyRestarts,omitempty"`
-	MaxPodLifeTimeSeconds             *uint                              `json:"maxPodLifeTimeSeconds,omitempty"`
+	PodLifeTime                       *PodLifeTime                       `json:"podLifeTime,omitempty"`
 	RemoveDuplicates                  *RemoveDuplicates                  `json:"removeDuplicates,omitempty"`
+	Namespaces                        *Namespaces                        `json:"namespaces"`
+	ThresholdPriority                 *int32                             `json:"thresholdPriority"`
+	ThresholdPriorityClassName        string                             `json:"thresholdPriorityClassName"`
 }
 
 type Percentage float64
@@ -70,3 +89,8 @@ type PodsHavingTooManyRestarts struct {
 type RemoveDuplicates struct {
 	ExcludeOwnerKinds []string `json:"excludeOwnerKinds,omitempty"`
 }
+
+type PodLifeTime struct {
+	MaxPodLifeTimeSeconds *uint    `json:"maxPodLifeTimeSeconds,omitempty"`
+	PodStatusPhases       []string `json:"podStatusPhases,omitempty"`
+}

pkg/api/v1alpha1/zz_generated.conversion.go

@@ -55,6 +55,16 @@ func RegisterConversions(s *runtime.Scheme) error {
 	}); 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 {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.Namespaces)(nil), (*Namespaces)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_Namespaces_To_v1alpha1_Namespaces(a.(*api.Namespaces), b.(*Namespaces), scope)
+	}); err != nil {
+		return err
+	}
 	if err := s.AddGeneratedConversionFunc((*NodeResourceUtilizationThresholds)(nil), (*api.NodeResourceUtilizationThresholds)(nil), func(a, b interface{}, scope conversion.Scope) error {
 		return Convert_v1alpha1_NodeResourceUtilizationThresholds_To_api_NodeResourceUtilizationThresholds(a.(*NodeResourceUtilizationThresholds), b.(*api.NodeResourceUtilizationThresholds), scope)
 	}); err != nil {
@@ -65,6 +75,16 @@ func RegisterConversions(s *runtime.Scheme) error {
 	}); err != nil {
 		return err
 	}
+	if err := s.AddGeneratedConversionFunc((*PodLifeTime)(nil), (*api.PodLifeTime)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_v1alpha1_PodLifeTime_To_api_PodLifeTime(a.(*PodLifeTime), b.(*api.PodLifeTime), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.PodLifeTime)(nil), (*PodLifeTime)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_PodLifeTime_To_v1alpha1_PodLifeTime(a.(*api.PodLifeTime), b.(*PodLifeTime), scope)
+	}); err != nil {
+		return err
+	}
 	if err := s.AddGeneratedConversionFunc((*PodsHavingTooManyRestarts)(nil), (*api.PodsHavingTooManyRestarts)(nil), func(a, b interface{}, scope conversion.Scope) error {
 		return Convert_v1alpha1_PodsHavingTooManyRestarts_To_api_PodsHavingTooManyRestarts(a.(*PodsHavingTooManyRestarts), b.(*api.PodsHavingTooManyRestarts), scope)
 	}); err != nil {
@@ -100,6 +120,9 @@ 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.EvictLocalStoragePods = (*bool)(unsafe.Pointer(in.EvictLocalStoragePods))
+	out.MaxNoOfPodsToEvictPerNode = (*int)(unsafe.Pointer(in.MaxNoOfPodsToEvictPerNode))
 	return nil
 }
 
@@ -110,6 +133,9 @@ 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.EvictLocalStoragePods = (*bool)(unsafe.Pointer(in.EvictLocalStoragePods))
+	out.MaxNoOfPodsToEvictPerNode = (*int)(unsafe.Pointer(in.MaxNoOfPodsToEvictPerNode))
 	return nil
 }
 
@@ -142,6 +168,28 @@ func Convert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy(in *api.Des
 	return autoConvert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy(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))
+	return nil
+}
+
+// Convert_v1alpha1_Namespaces_To_api_Namespaces is an autogenerated conversion function.
+func Convert_v1alpha1_Namespaces_To_api_Namespaces(in *Namespaces, out *api.Namespaces, s conversion.Scope) error {
+	return autoConvert_v1alpha1_Namespaces_To_api_Namespaces(in, out, s)
+}
+
+func autoConvert_api_Namespaces_To_v1alpha1_Namespaces(in *api.Namespaces, out *Namespaces, s conversion.Scope) error {
+	out.Include = *(*[]string)(unsafe.Pointer(&in.Include))
+	out.Exclude = *(*[]string)(unsafe.Pointer(&in.Exclude))
+	return nil
+}
+
+// Convert_api_Namespaces_To_v1alpha1_Namespaces is an autogenerated conversion function.
+func Convert_api_Namespaces_To_v1alpha1_Namespaces(in *api.Namespaces, out *Namespaces, s conversion.Scope) error {
+	return autoConvert_api_Namespaces_To_v1alpha1_Namespaces(in, out, s)
+}
+
 func autoConvert_v1alpha1_NodeResourceUtilizationThresholds_To_api_NodeResourceUtilizationThresholds(in *NodeResourceUtilizationThresholds, out *api.NodeResourceUtilizationThresholds, s conversion.Scope) error {
 	out.Thresholds = *(*api.ResourceThresholds)(unsafe.Pointer(&in.Thresholds))
 	out.TargetThresholds = *(*api.ResourceThresholds)(unsafe.Pointer(&in.TargetThresholds))
@@ -166,6 +214,28 @@ func Convert_api_NodeResourceUtilizationThresholds_To_v1alpha1_NodeResourceUtili
 	return autoConvert_api_NodeResourceUtilizationThresholds_To_v1alpha1_NodeResourceUtilizationThresholds(in, out, s)
 }
 
+func autoConvert_v1alpha1_PodLifeTime_To_api_PodLifeTime(in *PodLifeTime, out *api.PodLifeTime, s conversion.Scope) error {
+	out.MaxPodLifeTimeSeconds = (*uint)(unsafe.Pointer(in.MaxPodLifeTimeSeconds))
+	out.PodStatusPhases = *(*[]string)(unsafe.Pointer(&in.PodStatusPhases))
+	return nil
+}
+
+// Convert_v1alpha1_PodLifeTime_To_api_PodLifeTime is an autogenerated conversion function.
+func Convert_v1alpha1_PodLifeTime_To_api_PodLifeTime(in *PodLifeTime, out *api.PodLifeTime, s conversion.Scope) error {
+	return autoConvert_v1alpha1_PodLifeTime_To_api_PodLifeTime(in, out, s)
+}
+
+func autoConvert_api_PodLifeTime_To_v1alpha1_PodLifeTime(in *api.PodLifeTime, out *PodLifeTime, s conversion.Scope) error {
+	out.MaxPodLifeTimeSeconds = (*uint)(unsafe.Pointer(in.MaxPodLifeTimeSeconds))
+	out.PodStatusPhases = *(*[]string)(unsafe.Pointer(&in.PodStatusPhases))
+	return nil
+}
+
+// Convert_api_PodLifeTime_To_v1alpha1_PodLifeTime is an autogenerated conversion function.
+func Convert_api_PodLifeTime_To_v1alpha1_PodLifeTime(in *api.PodLifeTime, out *PodLifeTime, s conversion.Scope) error {
+	return autoConvert_api_PodLifeTime_To_v1alpha1_PodLifeTime(in, out, s)
+}
+
 func autoConvert_v1alpha1_PodsHavingTooManyRestarts_To_api_PodsHavingTooManyRestarts(in *PodsHavingTooManyRestarts, out *api.PodsHavingTooManyRestarts, s conversion.Scope) error {
 	out.PodRestartThreshold = in.PodRestartThreshold
 	out.IncludingInitContainers = in.IncludingInitContainers
@@ -212,8 +282,11 @@ func autoConvert_v1alpha1_StrategyParameters_To_api_StrategyParameters(in *Strat
 	out.NodeResourceUtilizationThresholds = (*api.NodeResourceUtilizationThresholds)(unsafe.Pointer(in.NodeResourceUtilizationThresholds))
 	out.NodeAffinityType = *(*[]string)(unsafe.Pointer(&in.NodeAffinityType))
 	out.PodsHavingTooManyRestarts = (*api.PodsHavingTooManyRestarts)(unsafe.Pointer(in.PodsHavingTooManyRestarts))
-	out.MaxPodLifeTimeSeconds = (*uint)(unsafe.Pointer(in.MaxPodLifeTimeSeconds))
+	out.PodLifeTime = (*api.PodLifeTime)(unsafe.Pointer(in.PodLifeTime))
 	out.RemoveDuplicates = (*api.RemoveDuplicates)(unsafe.Pointer(in.RemoveDuplicates))
+	out.Namespaces = (*api.Namespaces)(unsafe.Pointer(in.Namespaces))
+	out.ThresholdPriority = (*int32)(unsafe.Pointer(in.ThresholdPriority))
+	out.ThresholdPriorityClassName = in.ThresholdPriorityClassName
 	return nil
 }
 
@@ -226,8 +299,11 @@ func autoConvert_api_StrategyParameters_To_v1alpha1_StrategyParameters(in *api.S
 	out.NodeResourceUtilizationThresholds = (*NodeResourceUtilizationThresholds)(unsafe.Pointer(in.NodeResourceUtilizationThresholds))
 	out.NodeAffinityType = *(*[]string)(unsafe.Pointer(&in.NodeAffinityType))
 	out.PodsHavingTooManyRestarts = (*PodsHavingTooManyRestarts)(unsafe.Pointer(in.PodsHavingTooManyRestarts))
-	out.MaxPodLifeTimeSeconds = (*uint)(unsafe.Pointer(in.MaxPodLifeTimeSeconds))
+	out.PodLifeTime = (*PodLifeTime)(unsafe.Pointer(in.PodLifeTime))
 	out.RemoveDuplicates = (*RemoveDuplicates)(unsafe.Pointer(in.RemoveDuplicates))
+	out.Namespaces = (*Namespaces)(unsafe.Pointer(in.Namespaces))
+	out.ThresholdPriority = (*int32)(unsafe.Pointer(in.ThresholdPriority))
+	out.ThresholdPriorityClassName = in.ThresholdPriorityClassName
 	return nil
 }
 

pkg/api/v1alpha1/zz_generated.deepcopy.go

@@ -35,6 +35,21 @@ func (in *DeschedulerPolicy) DeepCopyInto(out *DeschedulerPolicy) {
 			(*out)[key] = *val.DeepCopy()
 		}
 	}
+	if in.NodeSelector != nil {
+		in, out := &in.NodeSelector, &out.NodeSelector
+		*out = new(string)
+		**out = **in
+	}
+	if in.EvictLocalStoragePods != nil {
+		in, out := &in.EvictLocalStoragePods, &out.EvictLocalStoragePods
+		*out = new(bool)
+		**out = **in
+	}
+	if in.MaxNoOfPodsToEvictPerNode != nil {
+		in, out := &in.MaxNoOfPodsToEvictPerNode, &out.MaxNoOfPodsToEvictPerNode
+		*out = new(int)
+		**out = **in
+	}
 	return
 }
 
@@ -77,6 +92,32 @@ 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 *Namespaces) DeepCopyInto(out *Namespaces) {
+	*out = *in
+	if in.Include != nil {
+		in, out := &in.Include, &out.Include
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	if in.Exclude != nil {
+		in, out := &in.Exclude, &out.Exclude
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Namespaces.
+func (in *Namespaces) DeepCopy() *Namespaces {
+	if in == nil {
+		return nil
+	}
+	out := new(Namespaces)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *NodeResourceUtilizationThresholds) DeepCopyInto(out *NodeResourceUtilizationThresholds) {
 	*out = *in
@@ -107,6 +148,32 @@ func (in *NodeResourceUtilizationThresholds) DeepCopy() *NodeResourceUtilization
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *PodLifeTime) DeepCopyInto(out *PodLifeTime) {
+	*out = *in
+	if in.MaxPodLifeTimeSeconds != nil {
+		in, out := &in.MaxPodLifeTimeSeconds, &out.MaxPodLifeTimeSeconds
+		*out = new(uint)
+		**out = **in
+	}
+	if in.PodStatusPhases != nil {
+		in, out := &in.PodStatusPhases, &out.PodStatusPhases
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PodLifeTime.
+func (in *PodLifeTime) DeepCopy() *PodLifeTime {
+	if in == nil {
+		return nil
+	}
+	out := new(PodLifeTime)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *PodsHavingTooManyRestarts) DeepCopyInto(out *PodsHavingTooManyRestarts) {
 	*out = *in
@@ -206,16 +273,26 @@ func (in *StrategyParameters) DeepCopyInto(out *StrategyParameters) {
 		*out = new(PodsHavingTooManyRestarts)
 		**out = **in
 	}
-	if in.MaxPodLifeTimeSeconds != nil {
+	if in.PodLifeTime != nil {
-		in, out := &in.MaxPodLifeTimeSeconds, &out.MaxPodLifeTimeSeconds
+		in, out := &in.PodLifeTime, &out.PodLifeTime
-		*out = new(uint)
+		*out = new(PodLifeTime)
-		**out = **in
+		(*in).DeepCopyInto(*out)
 	}
 	if in.RemoveDuplicates != nil {
 		in, out := &in.RemoveDuplicates, &out.RemoveDuplicates
 		*out = new(RemoveDuplicates)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.Namespaces != nil {
+		in, out := &in.Namespaces, &out.Namespaces
+		*out = new(Namespaces)
+		(*in).DeepCopyInto(*out)
+	}
+	if in.ThresholdPriority != nil {
+		in, out := &in.ThresholdPriority, &out.ThresholdPriority
+		*out = new(int32)
+		**out = **in
+	}
 	return
 }
 

pkg/api/zz_generated.deepcopy.go

@@ -35,6 +35,21 @@ func (in *DeschedulerPolicy) DeepCopyInto(out *DeschedulerPolicy) {
 			(*out)[key] = *val.DeepCopy()
 		}
 	}
+	if in.NodeSelector != nil {
+		in, out := &in.NodeSelector, &out.NodeSelector
+		*out = new(string)
+		**out = **in
+	}
+	if in.EvictLocalStoragePods != nil {
+		in, out := &in.EvictLocalStoragePods, &out.EvictLocalStoragePods
+		*out = new(bool)
+		**out = **in
+	}
+	if in.MaxNoOfPodsToEvictPerNode != nil {
+		in, out := &in.MaxNoOfPodsToEvictPerNode, &out.MaxNoOfPodsToEvictPerNode
+		*out = new(int)
+		**out = **in
+	}
 	return
 }
 
@@ -77,6 +92,32 @@ 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 *Namespaces) DeepCopyInto(out *Namespaces) {
+	*out = *in
+	if in.Include != nil {
+		in, out := &in.Include, &out.Include
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	if in.Exclude != nil {
+		in, out := &in.Exclude, &out.Exclude
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Namespaces.
+func (in *Namespaces) DeepCopy() *Namespaces {
+	if in == nil {
+		return nil
+	}
+	out := new(Namespaces)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *NodeResourceUtilizationThresholds) DeepCopyInto(out *NodeResourceUtilizationThresholds) {
 	*out = *in
@@ -107,6 +148,32 @@ func (in *NodeResourceUtilizationThresholds) DeepCopy() *NodeResourceUtilization
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *PodLifeTime) DeepCopyInto(out *PodLifeTime) {
+	*out = *in
+	if in.MaxPodLifeTimeSeconds != nil {
+		in, out := &in.MaxPodLifeTimeSeconds, &out.MaxPodLifeTimeSeconds
+		*out = new(uint)
+		**out = **in
+	}
+	if in.PodStatusPhases != nil {
+		in, out := &in.PodStatusPhases, &out.PodStatusPhases
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PodLifeTime.
+func (in *PodLifeTime) DeepCopy() *PodLifeTime {
+	if in == nil {
+		return nil
+	}
+	out := new(PodLifeTime)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *PodsHavingTooManyRestarts) DeepCopyInto(out *PodsHavingTooManyRestarts) {
 	*out = *in
@@ -206,16 +273,26 @@ func (in *StrategyParameters) DeepCopyInto(out *StrategyParameters) {
 		*out = new(PodsHavingTooManyRestarts)
 		**out = **in
 	}
-	if in.MaxPodLifeTimeSeconds != nil {
+	if in.PodLifeTime != nil {
-		in, out := &in.MaxPodLifeTimeSeconds, &out.MaxPodLifeTimeSeconds
+		in, out := &in.PodLifeTime, &out.PodLifeTime
-		*out = new(uint)
+		*out = new(PodLifeTime)
-		**out = **in
+		(*in).DeepCopyInto(*out)
 	}
 	if in.RemoveDuplicates != nil {
 		in, out := &in.RemoveDuplicates, &out.RemoveDuplicates
 		*out = new(RemoveDuplicates)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.Namespaces != nil {
+		in, out := &in.Namespaces, &out.Namespaces
+		*out = new(Namespaces)
+		(*in).DeepCopyInto(*out)
+	}
+	if in.ThresholdPriority != nil {
+		in, out := &in.ThresholdPriority, &out.ThresholdPriority
+		*out = new(int32)
+		**out = **in
+	}
 	return
 }
 

pkg/apis/componentconfig/register.go

@@ -19,8 +19,6 @@ package componentconfig
 import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
-
-	"sigs.k8s.io/descheduler/pkg/descheduler/scheme"
 )
 
 var (
@@ -34,12 +32,6 @@ const GroupName = "deschedulercomponentconfig"
 // SchemeGroupVersion is group version used to register these objects
 var SchemeGroupVersion = schema.GroupVersion{Group: GroupName, Version: runtime.APIVersionInternal}
 
-func init() {
-	if err := addKnownTypes(scheme.Scheme); err != nil {
-		panic(err)
-	}
-}
-
 // Kind takes an unqualified kind and returns a Group qualified GroupKind
 func Kind(kind string) schema.GroupKind {
 	return SchemeGroupVersion.WithKind(kind).GroupKind()

pkg/apis/componentconfig/types.go

@@ -20,6 +20,7 @@ import (
 	"time"
 
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	componentbaseconfig "k8s.io/component-base/config"
 )
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
@@ -48,4 +49,8 @@ type DeschedulerConfiguration struct {
 
 	// EvictLocalStoragePods allows pods using local storage to be evicted.
 	EvictLocalStoragePods bool
+
+	// Logging specifies the options of logging.
+	// Refer [Logs Options](https://github.com/kubernetes/component-base/blob/master/logs/options.go) for more information.
+	Logging componentbaseconfig.LoggingConfiguration
 }

pkg/descheduler/descheduler.go

@@ -20,7 +20,7 @@ import (
 	"context"
 	"fmt"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
 
@@ -70,25 +70,41 @@ func RunDeschedulerStrategies(ctx context.Context, rs *options.DeschedulerServer
 	sharedInformerFactory.WaitForCacheSync(stopChannel)
 
 	strategyFuncs := map[string]strategyFunction{
-		"RemoveDuplicates":                        strategies.RemoveDuplicatePods,
+		"RemoveDuplicates":                            strategies.RemoveDuplicatePods,
-		"LowNodeUtilization":                      strategies.LowNodeUtilization,
+		"LowNodeUtilization":                          strategies.LowNodeUtilization,
-		"RemovePodsViolatingInterPodAntiAffinity": strategies.RemovePodsViolatingInterPodAntiAffinity,
+		"RemovePodsViolatingInterPodAntiAffinity":     strategies.RemovePodsViolatingInterPodAntiAffinity,
-		"RemovePodsViolatingNodeAffinity":         strategies.RemovePodsViolatingNodeAffinity,
+		"RemovePodsViolatingNodeAffinity":             strategies.RemovePodsViolatingNodeAffinity,
-		"RemovePodsViolatingNodeTaints":           strategies.RemovePodsViolatingNodeTaints,
+		"RemovePodsViolatingNodeTaints":               strategies.RemovePodsViolatingNodeTaints,
-		"RemovePodsHavingTooManyRestarts":         strategies.RemovePodsHavingTooManyRestarts,
+		"RemovePodsHavingTooManyRestarts":             strategies.RemovePodsHavingTooManyRestarts,
-		"PodLifeTime":                             strategies.PodLifeTime,
+		"PodLifeTime":                                 strategies.PodLifeTime,
+		"RemovePodsViolatingTopologySpreadConstraint": strategies.RemovePodsViolatingTopologySpreadConstraint,
+	}
+
+	nodeSelector := rs.NodeSelector
+	if deschedulerPolicy.NodeSelector != nil {
+		nodeSelector = *deschedulerPolicy.NodeSelector
+	}
+
+	evictLocalStoragePods := rs.EvictLocalStoragePods
+	if deschedulerPolicy.EvictLocalStoragePods != nil {
+		evictLocalStoragePods = *deschedulerPolicy.EvictLocalStoragePods
+	}
+
+	maxNoOfPodsToEvictPerNode := rs.MaxNoOfPodsToEvictPerNode
+	if deschedulerPolicy.MaxNoOfPodsToEvictPerNode != nil {
+		maxNoOfPodsToEvictPerNode = *deschedulerPolicy.MaxNoOfPodsToEvictPerNode
 	}
 
 	wait.Until(func() {
-		nodes, err := nodeutil.ReadyNodes(ctx, rs.Client, nodeInformer, rs.NodeSelector, stopChannel)
+		nodes, err := nodeutil.ReadyNodes(ctx, rs.Client, nodeInformer, nodeSelector, stopChannel)
 		if err != nil {
-			klog.V(1).Infof("Unable to get ready nodes: %v", err)
+			klog.V(1).InfoS("Unable to get ready nodes", "err", err)
 			close(stopChannel)
 			return
 		}
 
 		if len(nodes) <= 1 {
-			klog.V(1).Infof("The cluster size is 0 or 1 meaning eviction causes service disruption or degradation. So aborting..")
+			klog.V(1).InfoS("The cluster size is 0 or 1 meaning eviction causes service disruption or degradation. So aborting..")
 			close(stopChannel)
 			return
 		}
@@ -97,9 +113,9 @@ func RunDeschedulerStrategies(ctx context.Context, rs *options.DeschedulerServer
 			rs.Client,
 			evictionPolicyGroupVersion,
 			rs.DryRun,
-			rs.MaxNoOfPodsToEvictPerNode,
+			maxNoOfPodsToEvictPerNode,
 			nodes,
-			rs.EvictLocalStoragePods,
+			evictLocalStoragePods,
 		)
 
 		for name, f := range strategyFuncs {

pkg/descheduler/descheduler_test.go

@@ -38,7 +38,10 @@ func TestTaintsUpdated(t *testing.T) {
 	stopChannel := make(chan struct{})
 	defer close(stopChannel)
 
-	rs := options.NewDeschedulerServer()
+	rs, err := options.NewDeschedulerServer()
+	if err != nil {
+		t.Fatalf("Unable to initialize server: %v", err)
+	}
 	rs.Client = client
 	rs.DeschedulingInterval = 100 * time.Millisecond
 	go func() {

pkg/descheduler/evictions/evictions.go

@@ -77,37 +77,6 @@ func NewPodEvictor(
 	}
 }
 
-// IsEvictable checks if a pod is evictable or not.
-func (pe *PodEvictor) IsEvictable(pod *v1.Pod) bool {
-	checkErrs := []error{}
-	if IsCriticalPod(pod) {
-		checkErrs = append(checkErrs, fmt.Errorf("pod is critical"))
-	}
-
-	ownerRefList := podutil.OwnerRef(pod)
-	if IsDaemonsetPod(ownerRefList) {
-		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 !pe.evictLocalStoragePods && IsPodWithLocalStorage(pod) {
-		checkErrs = append(checkErrs, fmt.Errorf("pod has local storage and descheduler is not configured with --evict-local-storage-pods"))
-	}
-
-	if IsMirrorPod(pod) {
-		checkErrs = append(checkErrs, fmt.Errorf("pod is a mirror pod"))
-	}
-
-	if len(checkErrs) > 0 && !HaveEvictAnnotation(pod) {
-		klog.V(4).Infof("Pod %s in namespace %s is not evictable: Pod lacks an eviction annotation and fails the following checks: %v", pod.Name, pod.Namespace, errors.NewAggregate(checkErrs).Error())
-		return false
-	}
-	return true
-}
-
 // NodeEvicted gives a number of pods evicted for node
 func (pe *PodEvictor) NodeEvicted(node *v1.Node) int {
 	return pe.nodepodCount[node]
@@ -137,17 +106,17 @@ func (pe *PodEvictor) EvictPod(ctx context.Context, pod *v1.Pod, node *v1.Node,
 	err := evictPod(ctx, pe.client, pod, pe.policyGroupVersion, pe.dryRun)
 	if err != nil {
 		// err is used only for logging purposes
-		klog.Errorf("Error evicting pod: %#v in namespace %#v%s: %#v", pod.Name, pod.Namespace, reason, err)
+		klog.ErrorS(err, "Error evicting pod", "pod", klog.KObj(pod), "reason", reason)
 		return false, nil
 	}
 
 	pe.nodepodCount[node]++
 	if pe.dryRun {
-		klog.V(1).Infof("Evicted pod in dry run mode: %#v in namespace %#v%s", pod.Name, pod.Namespace, reason)
+		klog.V(1).InfoS("Evicted pod in dry run mode", "pod", klog.KObj(pod), "reason", reason)
 	} else {
-		klog.V(1).Infof("Evicted pod: %#v in namespace %#v%s", pod.Name, pod.Namespace, reason)
+		klog.V(1).InfoS("Evicted pod", "pod", klog.KObj(pod), "reason", reason)
 		eventBroadcaster := record.NewBroadcaster()
-		eventBroadcaster.StartLogging(klog.V(3).Infof)
+		eventBroadcaster.StartStructuredLogging(3)
 		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))
@@ -183,6 +152,87 @@ func evictPod(ctx context.Context, client clientset.Interface, pod *v1.Pod, poli
 	return err
 }
 
+type Options struct {
+	priority *int32
+}
+
+// WithPriorityThreshold sets a threshold for pod's priority class.
+// Any pod whose priority class is lower is evictable.
+func WithPriorityThreshold(priority int32) func(opts *Options) {
+	return func(opts *Options) {
+		var p int32 = priority
+		opts.priority = &p
+	}
+}
+
+type constraint func(pod *v1.Pod) error
+
+type evictable struct {
+	constraints []constraint
+}
+
+// Evictable provides an implementation of IsEvictable(IsEvictable(pod *v1.Pod) bool).
+// The method accepts a list of options which allow to extend constraints
+// which decides when a pod is considered evictable.
+func (pe *PodEvictor) Evictable(opts ...func(opts *Options)) *evictable {
+	options := &Options{}
+	for _, opt := range opts {
+		opt(options)
+	}
+
+	ev := &evictable{}
+	if !pe.evictLocalStoragePods {
+		ev.constraints = append(ev.constraints, func(pod *v1.Pod) error {
+			if IsPodWithLocalStorage(pod) {
+				return fmt.Errorf("pod has local storage and descheduler is not configured with --evict-local-storage-pods")
+			}
+			return nil
+		})
+	}
+	if options.priority != nil {
+		ev.constraints = append(ev.constraints, func(pod *v1.Pod) error {
+			if IsPodEvictableBasedOnPriority(pod, *options.priority) {
+				return nil
+			}
+			return fmt.Errorf("pod has higher priority than specified priority class threshold")
+		})
+	}
+	return ev
+}
+
+// IsEvictable decides when a pod is evictable
+func (ev *evictable) IsEvictable(pod *v1.Pod) bool {
+	checkErrs := []error{}
+	if IsCriticalPod(pod) {
+		checkErrs = append(checkErrs, fmt.Errorf("pod is critical"))
+	}
+
+	ownerRefList := podutil.OwnerRef(pod)
+	if IsDaemonsetPod(ownerRefList) {
+		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 IsMirrorPod(pod) {
+		checkErrs = append(checkErrs, fmt.Errorf("pod is a mirror pod"))
+	}
+
+	for _, c := range ev.constraints {
+		if err := c(pod); err != nil {
+			checkErrs = append(checkErrs, err)
+		}
+	}
+
+	if len(checkErrs) > 0 && !HaveEvictAnnotation(pod) {
+		klog.V(4).InfoS("Pod lacks an eviction annotation and fails the following checks", "pod", klog.KObj(pod), "checks", errors.NewAggregate(checkErrs).Error())
+		return false
+	}
+	return true
+}
+
 func IsCriticalPod(pod *v1.Pod) bool {
 	return utils.IsCriticalPod(pod)
 }
@@ -216,3 +266,8 @@ func IsPodWithLocalStorage(pod *v1.Pod) bool {
 
 	return false
 }
+
+// IsPodEvictableBasedOnPriority checks if the given pod is evictable based on priority resolved from pod Spec.
+func IsPodEvictableBasedOnPriority(pod *v1.Pod, priority int32) bool {
+	return pod.Spec.Priority == nil || *pod.Spec.Priority < priority
+}

pkg/descheduler/evictions/evictions_test.go

@@ -71,10 +71,13 @@ func TestEvictPod(t *testing.T) {
 
 func TestIsEvictable(t *testing.T) {
 	n1 := test.BuildTestNode("node1", 1000, 2000, 13, nil)
+	lowPriority := int32(800)
+	highPriority := int32(900)
 	type testCase struct {
 		pod                   *v1.Pod
 		runBefore             func(*v1.Pod)
 		evictLocalStoragePods bool
+		priorityThreshold     *int32
 		result                bool
 	}
 
@@ -179,6 +182,7 @@ func TestIsEvictable(t *testing.T) {
 		}, {
 			pod: test.BuildTestPod("p10", 400, 0, n1.Name, nil),
 			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 				pod.Annotations = test.GetMirrorPodAnnotation()
 			},
 			evictLocalStoragePods: false,
@@ -186,6 +190,7 @@ func TestIsEvictable(t *testing.T) {
 		}, {
 			pod: test.BuildTestPod("p11", 400, 0, n1.Name, nil),
 			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 				pod.Annotations = test.GetMirrorPodAnnotation()
 				pod.Annotations["descheduler.alpha.kubernetes.io/evict"] = "true"
 			},
@@ -194,6 +199,7 @@ func TestIsEvictable(t *testing.T) {
 		}, {
 			pod: test.BuildTestPod("p12", 400, 0, n1.Name, nil),
 			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 				priority := utils.SystemCriticalPriority
 				pod.Spec.Priority = &priority
 			},
@@ -202,6 +208,7 @@ func TestIsEvictable(t *testing.T) {
 		}, {
 			pod: test.BuildTestPod("p13", 400, 0, n1.Name, nil),
 			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 				priority := utils.SystemCriticalPriority
 				pod.Spec.Priority = &priority
 				pod.Annotations = map[string]string{
@@ -210,15 +217,41 @@ func TestIsEvictable(t *testing.T) {
 			},
 			evictLocalStoragePods: false,
 			result:                true,
+		}, {
+			pod: test.BuildTestPod("p14", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+				pod.Spec.Priority = &highPriority
+			},
+			evictLocalStoragePods: false,
+			priorityThreshold:     &lowPriority,
+			result:                false,
+		}, {
+			pod: test.BuildTestPod("p15", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+				pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
+				pod.Spec.Priority = &highPriority
+			},
+			evictLocalStoragePods: false,
+			priorityThreshold:     &lowPriority,
+			result:                true,
 		},
 	}
 
 	for _, test := range testCases {
 		test.runBefore(test.pod)
+
 		podEvictor := &PodEvictor{
 			evictLocalStoragePods: test.evictLocalStoragePods,
 		}
-		result := podEvictor.IsEvictable(test.pod)
+
+		evictable := podEvictor.Evictable()
+		if test.priorityThreshold != nil {
+			evictable = podEvictor.Evictable(WithPriorityThreshold(*test.priorityThreshold))
+		}
+
+		result := evictable.IsEvictable(test.pod)
 		if result != test.result {
 			t.Errorf("IsEvictable should return for pod %s %t, but it returns %t", test.pod.Name, test.result, result)
 		}
@@ -233,10 +266,6 @@ func TestPodTypes(t *testing.T) {
 	p2 := test.BuildTestPod("p2", 400, 0, n1.Name, nil)
 	p3 := test.BuildTestPod("p3", 400, 0, n1.Name, nil)
 	p4 := test.BuildTestPod("p4", 400, 0, n1.Name, nil)
-	p5 := test.BuildTestPod("p5", 400, 0, n1.Name, nil)
-	p6 := test.BuildTestPod("p6", 400, 0, n1.Name, nil)
-
-	p6.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 
 	p1.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
 	// The following 4 pods won't get evicted.
@@ -257,18 +286,9 @@ func TestPodTypes(t *testing.T) {
 	}
 	// A Mirror Pod.
 	p4.Annotations = test.GetMirrorPodAnnotation()
-	// A Critical Pod.
-	p5.Namespace = "kube-system"
-	priority := utils.SystemCriticalPriority
-	p5.Spec.Priority = &priority
-	systemCriticalPriority := utils.SystemCriticalPriority
-	p5.Spec.Priority = &systemCriticalPriority
 	if !IsMirrorPod(p4) {
 		t.Errorf("Expected p4 to be a mirror pod.")
 	}
-	if !IsCriticalPod(p5) {
-		t.Errorf("Expected p5 to be a critical pod.")
-	}
 	if !IsPodWithLocalStorage(p3) {
 		t.Errorf("Expected p3 to be a pod with local storage.")
 	}

pkg/descheduler/node/node.go

@@ -18,7 +18,8 @@ package node
 
 import (
 	"context"
-	"k8s.io/api/core/v1"
+
+	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
 	coreinformers "k8s.io/client-go/informers/core/v1"
@@ -42,7 +43,7 @@ func ReadyNodes(ctx context.Context, client clientset.Interface, nodeInformer co
 	}
 
 	if len(nodes) == 0 {
-		klog.V(2).Infof("node lister returned empty list, now fetch directly")
+		klog.V(2).InfoS("Node lister returned empty list, now fetch directly")
 
 		nItems, err := client.CoreV1().Nodes().List(ctx, metav1.ListOptions{LabelSelector: nodeSelector})
 		if err != nil {
@@ -77,19 +78,19 @@ func IsReady(node *v1.Node) bool {
 		// - NodeOutOfDisk condition status is ConditionFalse,
 		// - NodeNetworkUnavailable condition status is ConditionFalse.
 		if cond.Type == v1.NodeReady && cond.Status != v1.ConditionTrue {
-			klog.V(1).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
+			klog.V(1).InfoS("Ignoring node", "node", klog.KObj(node), "condition", cond.Type, "status", cond.Status)
 			return false
 		} /*else if cond.Type == v1.NodeOutOfDisk && cond.Status != v1.ConditionFalse {
-			klog.V(4).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
+			klog.V(4).InfoS("Ignoring node with condition status", "node", klog.KObj(node.Name), "condition", cond.Type, "status", cond.Status)
 			return false
 		} else if cond.Type == v1.NodeNetworkUnavailable && cond.Status != v1.ConditionFalse {
-			klog.V(4).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
+			klog.V(4).InfoS("Ignoring node with condition status", "node", klog.KObj(node.Name), "condition", cond.Type, "status", cond.Status)
 			return false
 		}*/
 	}
 	// Ignore nodes that are marked unschedulable
 	/*if node.Spec.Unschedulable {
-		klog.V(4).Infof("Ignoring node %v since it is unschedulable", node.Name)
+		klog.V(4).InfoS("Ignoring node since it is unschedulable", "node", klog.KObj(node.Name))
 		return false
 	}*/
 	return true
@@ -112,7 +113,7 @@ func PodFitsAnyNode(pod *v1.Pod, nodes []*v1.Node) bool {
 			continue
 		}
 		if !IsNodeUnschedulable(node) {
-			klog.V(2).Infof("Pod %v can possibly be scheduled on %v", pod.Name, node.Name)
+			klog.V(2).InfoS("Pod can possibly be scheduled on a different node", "pod", klog.KObj(pod), "node", klog.KObj(node))
 			return true
 		}
 	}
@@ -125,15 +126,15 @@ func PodFitsCurrentNode(pod *v1.Pod, node *v1.Node) bool {
 	ok, err := utils.PodMatchNodeSelector(pod, node)
 
 	if err != nil {
-		klog.Error(err)
+		klog.ErrorS(err, "Failed to match node selector")
 		return false
 	}
 
 	if !ok {
-		klog.V(2).Infof("Pod %v does not fit on node %v", pod.Name, node.Name)
+		klog.V(2).InfoS("Pod does not fit on node", "pod", klog.KObj(pod), "node", klog.KObj(node))
 		return false
 	}
 
-	klog.V(2).Infof("Pod %v fits on node %v", pod.Name, node.Name)
+	klog.V(2).InfoS("Pod fits on node", "pod", klog.KObj(pod), "node", klog.KObj(node))
 	return true
 }

pkg/descheduler/node/node_test.go

@@ -20,7 +20,7 @@ import (
 	"context"
 	"testing"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
@@ -69,7 +69,7 @@ func TestReadyNodesWithNodeSelector(t *testing.T) {
 	sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
 	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
 
-	stopChannel := make(chan struct{}, 0)
+	stopChannel := make(chan struct{})
 	sharedInformerFactory.Start(stopChannel)
 	sharedInformerFactory.WaitForCacheSync(stopChannel)
 	defer close(stopChannel)

pkg/descheduler/pod/pods.go

@@ -18,34 +18,111 @@ 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"
 	"sigs.k8s.io/descheduler/pkg/utils"
-	"sort"
 )
 
+type Options struct {
+	filter             func(pod *v1.Pod) bool
+	includedNamespaces []string
+	excludedNamespaces []string
+}
+
+// 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
+	}
+}
+
+// WithNamespaces sets included namespaces
+func WithNamespaces(namespaces []string) func(opts *Options) {
+	return func(opts *Options) {
+		opts.includedNamespaces = namespaces
+	}
+}
+
+// WithoutNamespaces sets excluded namespaces
+func WithoutNamespaces(namespaces []string) func(opts *Options) {
+	return func(opts *Options) {
+		opts.excludedNamespaces = namespaces
+	}
+}
+
 // 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.IsEvictable, in order to only list the evictable pods on a node, but can
+// (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 IsEvictable if there are further restrictions, such as with NodeAffinity).
+// be used by strategies to extend it if there are further restrictions, such as with NodeAffinity).
-// The filter function should return true if the pod should be returned from ListPodsOnANode
+func ListPodsOnANode(
-func ListPodsOnANode(ctx context.Context, client clientset.Interface, node *v1.Node, filter func(pod *v1.Pod) bool) ([]*v1.Pod, error) {
+	ctx context.Context,
-	fieldSelector, err := fields.ParseSelector("spec.nodeName=" + node.Name + ",status.phase!=" + string(v1.PodSucceeded) + ",status.phase!=" + string(v1.PodFailed))
+	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)
+
+	if len(options.includedNamespaces) > 0 {
+		fieldSelector, err := fields.ParseSelector(fieldSelectorString)
+		if err != nil {
+			return []*v1.Pod{}, err
+		}
+
+		for _, namespace := range options.includedNamespaces {
+			podList, err := client.CoreV1().Pods(namespace).List(ctx,
+				metav1.ListOptions{FieldSelector: fieldSelector.String()})
+			if err != nil {
+				return []*v1.Pod{}, err
+			}
+			for i := range podList.Items {
+				if options.filter != nil && !options.filter(&podList.Items[i]) {
+					continue
+				}
+				pods = append(pods, &podList.Items[i])
+			}
+		}
+		return pods, nil
+	}
+
+	if len(options.excludedNamespaces) > 0 {
+		for _, namespace := range options.excludedNamespaces {
+			fieldSelectorString += ",metadata.namespace!=" + namespace
+		}
+	}
+
+	fieldSelector, err := fields.ParseSelector(fieldSelectorString)
 	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()})
 	if err != nil {
 		return []*v1.Pod{}, err
 	}
 
-	pods := make([]*v1.Pod, 0)
 	for i := range podList.Items {
-		if filter != nil && !filter(&podList.Items[i]) {
+		// 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])

pkg/descheduler/pod/pods_test.go

@@ -67,7 +67,7 @@ func TestListPodsOnANode(t *testing.T) {
 			}
 			return true, nil, fmt.Errorf("Failed to list: %v", list)
 		})
-		pods, _ := ListPodsOnANode(context.TODO(), fakeClient, testCase.node, nil)
+		pods, _ := ListPodsOnANode(context.TODO(), fakeClient, testCase.node)
 		if len(pods) != testCase.expectedPodCount {
 			t.Errorf("expected %v pods on node %v, got %+v", testCase.expectedPodCount, testCase.node.Name, len(pods))
 		}

pkg/descheduler/policyconfig.go

@@ -30,7 +30,7 @@ import (
 
 func LoadPolicyConfig(policyConfigFile string) (*api.DeschedulerPolicy, error) {
 	if policyConfigFile == "" {
-		klog.V(1).Infof("policy config file not specified")
+		klog.V(1).InfoS("Policy config file not specified")
 		return nil, nil
 	}
 

pkg/descheduler/scheme/scheme.go

@@ -19,9 +19,22 @@ package scheme
 import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/serializer"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/api/v1alpha1"
+	"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
+	componentconfigv1alpha1 "sigs.k8s.io/descheduler/pkg/apis/componentconfig/v1alpha1"
 )
 
 var (
 	Scheme = runtime.NewScheme()
 	Codecs = serializer.NewCodecFactory(Scheme)
 )
+
+func init() {
+	utilruntime.Must(api.AddToScheme(Scheme))
+	utilruntime.Must(v1alpha1.AddToScheme(Scheme))
+
+	utilruntime.Must(componentconfig.AddToScheme(Scheme))
+	utilruntime.Must(componentconfigv1alpha1.AddToScheme(Scheme))
+}

pkg/descheduler/strategies/duplicates.go

@@ -18,6 +18,8 @@ package strategies
 
 import (
 	"context"
+	"fmt"
+	"math"
 	"reflect"
 	"sort"
 	"strings"
@@ -31,8 +33,29 @@ import (
 	"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"
 )
 
+func validateRemoveDuplicatePodsParams(params *api.StrategyParameters) error {
+	if params == nil {
+		return 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 fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
+	}
+
+	return nil
+}
+
+type podOwner struct {
+	namespace, kind, name string
+	imagesHash            string
+}
+
 // RemoveDuplicatePods removes the duplicate pods on node. This strategy evicts all duplicate pods on node.
 // A pod is said to be a duplicate of other if both of them are from same creator, kind and are within the same
 // namespace, and have at least one container with the same image.
@@ -44,15 +67,44 @@ func RemoveDuplicatePods(
 	nodes []*v1.Node,
 	podEvictor *evictions.PodEvictor,
 ) {
+	if err := validateRemoveDuplicatePodsParams(strategy.Params); err != nil {
+		klog.ErrorS(err, "Invalid RemoveDuplicatePods parameters")
+		return
+	}
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Failed to get threshold priority from strategy's params")
+		return
+	}
+
+	var includedNamespaces, excludedNamespaces []string
+	if strategy.Params != nil && strategy.Params.Namespaces != nil {
+		includedNamespaces = strategy.Params.Namespaces.Include
+		excludedNamespaces = strategy.Params.Namespaces.Exclude
+	}
+
+	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
+
+	duplicatePods := make(map[podOwner]map[string][]*v1.Pod)
+	ownerKeyOccurence := make(map[podOwner]int32)
+	nodeCount := 0
+	nodeMap := make(map[string]*v1.Node)
+
 	for _, node := range nodes {
-		klog.V(1).Infof("Processing node: %#v", node.Name)
+		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(ctx, client, node, podEvictor.IsEvictable)
+		pods, err := podutil.ListPodsOnANode(ctx,
+			client,
+			node,
+			podutil.WithFilter(evictable.IsEvictable),
+			podutil.WithNamespaces(includedNamespaces),
+			podutil.WithoutNamespaces(excludedNamespaces),
+		)
 		if err != nil {
-			klog.Errorf("error listing evictable pods on node %s: %+v", node.Name, err)
+			klog.ErrorS(err, "Error listing evictable pods on node", "node", klog.KObj(node))
 			continue
 		}
-
+		nodeMap[node.Name] = node
-		duplicatePods := make([]*v1.Pod, 0, len(pods))
+		nodeCount++
 		// Each pod has a list of owners and a list of containers, and each container has 1 image spec.
 		// For each pod, we go through all the OwnerRef/Image mappings and represent them as a "key" string.
 		// All of those mappings together makes a list of "key" strings that essentially represent that pod's uniqueness.
@@ -69,16 +121,29 @@ func RemoveDuplicatePods(
 		duplicateKeysMap := map[string][][]string{}
 		for _, pod := range pods {
 			ownerRefList := podutil.OwnerRef(pod)
-			if hasExcludedOwnerRefKind(ownerRefList, strategy) {
+			if hasExcludedOwnerRefKind(ownerRefList, strategy) || len(ownerRefList) == 0 {
 				continue
 			}
 			podContainerKeys := make([]string, 0, len(ownerRefList)*len(pod.Spec.Containers))
+			imageList := []string{}
+			for _, container := range pod.Spec.Containers {
+				imageList = append(imageList, container.Image)
+			}
+			sort.Strings(imageList)
+			imagesHash := strings.Join(imageList, "#")
 			for _, ownerRef := range ownerRefList {
-				for _, container := range pod.Spec.Containers {
+				ownerKey := podOwner{
+					namespace:  pod.ObjectMeta.Namespace,
+					kind:       ownerRef.Kind,
+					name:       ownerRef.Name,
+					imagesHash: imagesHash,
+				}
+				ownerKeyOccurence[ownerKey] = ownerKeyOccurence[ownerKey] + 1
+				for _, image := range imageList {
 					// Namespace/Kind/Name should be unique for the cluster.
 					// We also consider the image, as 2 pods could have the same owner but serve different purposes
 					// So any non-unique Namespace/Kind/Name/Image pattern is a duplicate pod.
-					s := strings.Join([]string{pod.ObjectMeta.Namespace, ownerRef.Kind, ownerRef.Name, container.Image}, "/")
+					s := strings.Join([]string{pod.ObjectMeta.Namespace, ownerRef.Kind, ownerRef.Name, image}, "/")
 					podContainerKeys = append(podContainerKeys, s)
 				}
 			}
@@ -90,7 +155,19 @@ func RemoveDuplicatePods(
 				for _, keys := range existing {
 					if reflect.DeepEqual(keys, podContainerKeys) {
 						matched = true
-						duplicatePods = append(duplicatePods, pod)
+						klog.V(3).InfoS("Duplicate found", "pod", klog.KObj(pod))
+						for _, ownerRef := range ownerRefList {
+							ownerKey := podOwner{
+								namespace:  pod.ObjectMeta.Namespace,
+								kind:       ownerRef.Kind,
+								name:       ownerRef.Name,
+								imagesHash: imagesHash,
+							}
+							if _, ok := duplicatePods[ownerKey]; !ok {
+								duplicatePods[ownerKey] = make(map[string][]*v1.Pod)
+							}
+							duplicatePods[ownerKey][node.Name] = append(duplicatePods[ownerKey][node.Name], pod)
+						}
 						break
 					}
 				}
@@ -103,11 +180,23 @@ func RemoveDuplicatePods(
 				duplicateKeysMap[podContainerKeys[0]] = [][]string{podContainerKeys}
 			}
 		}
+	}
 
-		for _, pod := range duplicatePods {
+	// 1. how many pods can be evicted to respect uniform placement of pods among viable nodes?
-			if _, err := podEvictor.EvictPod(ctx, pod, node, "RemoveDuplicatePods"); err != nil {
+	for ownerKey, nodes := range duplicatePods {
-				klog.Errorf("Error evicting pod: (%#v)", err)
+		upperAvg := int(math.Ceil(float64(ownerKeyOccurence[ownerKey]) / float64(nodeCount)))
-				break
+		for nodeName, pods := range nodes {
+			klog.V(2).InfoS("Average occurrence per node", "node", klog.KObj(nodeMap[nodeName]), "ownerKey", ownerKey, "avg", upperAvg)
+			// list of duplicated pods does not contain the original referential pod
+			if len(pods)+1 > upperAvg {
+				// It's assumed all duplicated pods are in the same priority class
+				// TODO(jchaloup): check if the pod has a different node to lend to
+				for _, pod := range pods[upperAvg-1:] {
+					if _, err := podEvictor.EvictPod(ctx, pod, nodeMap[nodeName], "RemoveDuplicatePods"); err != nil {
+						klog.ErrorS(err, "Error evicting pod", "pod", klog.KObj(pod))
+						break
+					}
+				}
 			}
 		}
 	}

pkg/descheduler/strategies/duplicates_test.go

@@ -20,8 +20,9 @@ import (
 	"context"
 	"testing"
 
-	"k8s.io/api/core/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/runtime"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
@@ -31,34 +32,45 @@ import (
 	"sigs.k8s.io/descheduler/test"
 )
 
+func buildTestPodWithImage(podName, node, image string) *v1.Pod {
+	pod := test.BuildTestPod(podName, 100, 0, node, test.SetRSOwnerRef)
+	pod.Spec.Containers = append(pod.Spec.Containers, v1.Container{
+		Name:  image,
+		Image: image,
+	})
+	return pod
+}
+
 func TestFindDuplicatePods(t *testing.T) {
 	ctx := context.Background()
 	// first setup pods
-	node := test.BuildTestNode("n1", 2000, 3000, 10, nil)
+	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
-	p1 := test.BuildTestPod("p1", 100, 0, node.Name, nil)
+	node2 := test.BuildTestNode("n2", 2000, 3000, 10, nil)
+
+	p1 := test.BuildTestPod("p1", 100, 0, node1.Name, nil)
 	p1.Namespace = "dev"
-	p2 := test.BuildTestPod("p2", 100, 0, node.Name, nil)
+	p2 := test.BuildTestPod("p2", 100, 0, node1.Name, nil)
 	p2.Namespace = "dev"
-	p3 := test.BuildTestPod("p3", 100, 0, node.Name, nil)
+	p3 := test.BuildTestPod("p3", 100, 0, node1.Name, nil)
 	p3.Namespace = "dev"
-	p4 := test.BuildTestPod("p4", 100, 0, node.Name, nil)
+	p4 := test.BuildTestPod("p4", 100, 0, node1.Name, nil)
-	p5 := test.BuildTestPod("p5", 100, 0, node.Name, nil)
+	p5 := test.BuildTestPod("p5", 100, 0, node1.Name, nil)
-	p6 := test.BuildTestPod("p6", 100, 0, node.Name, nil)
+	p6 := test.BuildTestPod("p6", 100, 0, node1.Name, nil)
-	p7 := test.BuildTestPod("p7", 100, 0, node.Name, nil)
+	p7 := test.BuildTestPod("p7", 100, 0, node1.Name, nil)
 	p7.Namespace = "kube-system"
-	p8 := test.BuildTestPod("p8", 100, 0, node.Name, nil)
+	p8 := test.BuildTestPod("p8", 100, 0, node1.Name, nil)
 	p8.Namespace = "test"
-	p9 := test.BuildTestPod("p9", 100, 0, node.Name, nil)
+	p9 := test.BuildTestPod("p9", 100, 0, node1.Name, nil)
 	p9.Namespace = "test"
-	p10 := test.BuildTestPod("p10", 100, 0, node.Name, nil)
+	p10 := test.BuildTestPod("p10", 100, 0, node1.Name, nil)
 	p10.Namespace = "test"
-	p11 := test.BuildTestPod("p11", 100, 0, node.Name, nil)
+	p11 := test.BuildTestPod("p11", 100, 0, node1.Name, nil)
 	p11.Namespace = "different-images"
-	p12 := test.BuildTestPod("p12", 100, 0, node.Name, nil)
+	p12 := test.BuildTestPod("p12", 100, 0, node1.Name, nil)
 	p12.Namespace = "different-images"
-	p13 := test.BuildTestPod("p13", 100, 0, node.Name, nil)
+	p13 := test.BuildTestPod("p13", 100, 0, node1.Name, nil)
 	p13.Namespace = "different-images"
-	p14 := test.BuildTestPod("p14", 100, 0, node.Name, nil)
+	p14 := test.BuildTestPod("p14", 100, 0, node1.Name, nil)
 	p14.Namespace = "different-images"
 
 	// ### Evictable Pods ###
@@ -121,10 +133,10 @@ func TestFindDuplicatePods(t *testing.T) {
 		strategy                api.DeschedulerStrategy
 	}{
 		{
-			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet. 2 should be evicted.",
+			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet. 1 should be evicted.",
 			maxPodsToEvictPerNode:   5,
 			pods:                    []v1.Pod{*p1, *p2, *p3},
-			expectedEvictedPodCount: 2,
+			expectedEvictedPodCount: 1,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
@@ -135,17 +147,17 @@ func TestFindDuplicatePods(t *testing.T) {
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{RemoveDuplicates: &api.RemoveDuplicates{ExcludeOwnerKinds: []string{"ReplicaSet"}}}},
 		},
 		{
-			description:             "Three Pods in the `test` Namespace, bound to same ReplicaSet. 2 should be evicted.",
+			description:             "Three Pods in the `test` Namespace, bound to same ReplicaSet. 1 should be evicted.",
 			maxPodsToEvictPerNode:   5,
 			pods:                    []v1.Pod{*p8, *p9, *p10},
-			expectedEvictedPodCount: 2,
+			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},
-			expectedEvictedPodCount: 4,
+			expectedEvictedPodCount: 2,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
@@ -159,7 +171,7 @@ func TestFindDuplicatePods(t *testing.T) {
 			description:             "Test all Pods: 4 should be evicted.",
 			maxPodsToEvictPerNode:   5,
 			pods:                    []v1.Pod{*p1, *p2, *p3, *p4, *p5, *p6, *p7, *p8, *p9, *p10},
-			expectedEvictedPodCount: 4,
+			expectedEvictedPodCount: 2,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
@@ -186,27 +198,220 @@ func TestFindDuplicatePods(t *testing.T) {
 	}
 
 	for _, testCase := range testCases {
-		fakeClient := &fake.Clientset{}
+		t.Run(testCase.description, func(t *testing.T) {
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
+			fakeClient := &fake.Clientset{}
-			return true, &v1.PodList{Items: testCase.pods}, nil
+			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-		})
+				return true, &v1.PodList{Items: testCase.pods}, nil
-		fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
+			})
-			return true, node, nil
+			podEvictor := evictions.NewPodEvictor(
-		})
+				fakeClient,
-		podEvictor := evictions.NewPodEvictor(
+				"v1",
-			fakeClient,
+				false,
-			"v1",
+				testCase.maxPodsToEvictPerNode,
-			false,
+				[]*v1.Node{node1, node2},
-			testCase.maxPodsToEvictPerNode,
+				false,
-			[]*v1.Node{node},
+			)
-			false,
-		)
 
-		RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, []*v1.Node{node}, podEvictor)
+			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, []*v1.Node{node1, node2}, podEvictor)
-		podsEvicted := podEvictor.TotalEvicted()
+			podsEvicted := podEvictor.TotalEvicted()
-		if podsEvicted != testCase.expectedEvictedPodCount {
+			if podsEvicted != testCase.expectedEvictedPodCount {
-			t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", testCase.description, testCase.expectedEvictedPodCount, podsEvicted)
+				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", testCase.description, testCase.expectedEvictedPodCount, podsEvicted)
-		}
+			}
+		})
 	}
 
 }
+
+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"},
+		}
+	}
+	setTwoRSOwnerRef := func(pod *v1.Pod) {
+		pod.ObjectMeta.OwnerReferences = []metav1.OwnerReference{
+			{Kind: "ReplicaSet", APIVersion: "v1", Name: "replicaset-1"},
+			{Kind: "ReplicaSet", APIVersion: "v1", Name: "replicaset-2"},
+		}
+	}
+
+	testCases := []struct {
+		description             string
+		maxPodsToEvictPerNode   int
+		pods                    []v1.Pod
+		nodes                   []*v1.Node
+		expectedEvictedPodCount int
+		strategy                api.DeschedulerStrategy
+	}{
+		{
+			description: "Evict pods uniformly",
+			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),
+			},
+			expectedEvictedPodCount: 2,
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, nil),
+				test.BuildTestNode("n2", 2000, 3000, 10, nil),
+				test.BuildTestNode("n3", 2000, 3000, 10, nil),
+			},
+			strategy: api.DeschedulerStrategy{},
+		},
+		{
+			description: "Evict pods uniformly with one node left out",
+			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),
+			},
+			expectedEvictedPodCount: 1,
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, nil),
+				test.BuildTestNode("n2", 2000, 3000, 10, nil),
+			},
+			strategy: api.DeschedulerStrategy{},
+		},
+		{
+			description: "Evict pods uniformly with two replica sets",
+			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),
+			},
+			expectedEvictedPodCount: 4,
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, nil),
+				test.BuildTestNode("n2", 2000, 3000, 10, nil),
+				test.BuildTestNode("n3", 2000, 3000, 10, nil),
+			},
+			strategy: api.DeschedulerStrategy{},
+		},
+		{
+			description: "Evict pods uniformly with two owner references",
+			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),
+				// (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),
+			},
+			expectedEvictedPodCount: 4,
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, nil),
+				test.BuildTestNode("n2", 2000, 3000, 10, nil),
+				test.BuildTestNode("n3", 2000, 3000, 10, nil),
+			},
+			strategy: api.DeschedulerStrategy{},
+		},
+		{
+			description: "Evict pods with number of pods less than nodes",
+			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),
+			},
+			expectedEvictedPodCount: 1,
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, nil),
+				test.BuildTestNode("n2", 2000, 3000, 10, nil),
+				test.BuildTestNode("n3", 2000, 3000, 10, nil),
+			},
+			strategy: api.DeschedulerStrategy{},
+		},
+		{
+			description: "Evict pods with number of pods less than nodes, but ignore different pods with the same ownerref",
+			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"),
+			},
+			expectedEvictedPodCount: 1,
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, nil),
+				test.BuildTestNode("n2", 2000, 3000, 10, nil),
+				test.BuildTestNode("n3", 2000, 3000, 10, nil),
+			},
+			strategy: api.DeschedulerStrategy{},
+		},
+		{
+			description: "Evict pods with a single pod with three nodes",
+			pods: []v1.Pod{
+				// (2,0,0) -> (1,1,0) -> 1 eviction
+				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+			},
+			expectedEvictedPodCount: 0,
+			nodes: []*v1.Node{
+				test.BuildTestNode("n1", 2000, 3000, 10, nil),
+				test.BuildTestNode("n2", 2000, 3000, 10, nil),
+				test.BuildTestNode("n3", 2000, 3000, 10, nil),
+			},
+			strategy: api.DeschedulerStrategy{},
+		},
+	}
+
+	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
+			})
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				"v1",
+				false,
+				testCase.maxPodsToEvictPerNode,
+				testCase.nodes,
+				false,
+			)
+
+			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor)
+			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/lownodeutilization.go

@@ -33,11 +33,14 @@ import (
 	"sigs.k8s.io/descheduler/pkg/utils"
 )
 
-// NodeUsageMap stores a node's info, pods on it and its resource usage
+// NodeUsage stores a node's info, pods on it, thresholds and its resource usage
-type NodeUsageMap struct {
+type NodeUsage struct {
 	node    *v1.Node
-	usage   api.ResourceThresholds
+	usage   map[v1.ResourceName]*resource.Quantity
 	allPods []*v1.Pod
+
+	lowResourceThreshold  map[v1.ResourceName]*resource.Quantity
+	highResourceThreshold map[v1.ResourceName]*resource.Quantity
 }
 
 // NodePodsMap is a set of (node, pods) pairs
@@ -50,20 +53,35 @@ const (
 	MaxResourcePercentage = 100
 )
 
+func validateLowNodeUtilizationParams(params *api.StrategyParameters) error {
+	if params == nil || params.NodeResourceUtilizationThresholds == nil {
+		return fmt.Errorf("NodeResourceUtilizationThresholds not set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
+	}
+
+	return nil
+}
+
 // 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) {
-	// todo: move to config validation?
 	// 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 strategy.Params == nil || strategy.Params.NodeResourceUtilizationThresholds == nil {
+	if err := validateLowNodeUtilizationParams(strategy.Params); err != nil {
-		klog.V(1).Infof("NodeResourceUtilizationThresholds not set")
+		klog.ErrorS(err, "Invalid LowNodeUtilization parameters")
+		return
+	}
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Failed to get threshold priority from strategy's params")
 		return
 	}
 
 	thresholds := strategy.Params.NodeResourceUtilizationThresholds.Thresholds
 	targetThresholds := strategy.Params.NodeResourceUtilizationThresholds.TargetThresholds
 	if err := validateStrategyConfig(thresholds, targetThresholds); err != nil {
-		klog.Errorf("LowNodeUtilization config is not valid: %v", err)
+		klog.ErrorS(err, "LowNodeUtilization config is not valid")
 		return
 	}
 	// check if Pods/CPU/Mem are set, if not, set them to 100
@@ -80,45 +98,59 @@ func LowNodeUtilization(ctx context.Context, client clientset.Interface, strateg
 		targetThresholds[v1.ResourceMemory] = MaxResourcePercentage
 	}
 
-	npm := createNodePodsMap(ctx, client, nodes)
+	lowNodes, targetNodes := classifyNodes(
-	lowNodes, targetNodes := classifyNodes(npm, thresholds, targetThresholds)
+		getNodeUsage(ctx, client, nodes, thresholds, targetThresholds),
+		// The node has to be schedulable (to be able to move workload there)
+		func(node *v1.Node, usage NodeUsage) bool {
+			if nodeutil.IsNodeUnschedulable(node) {
+				klog.V(2).InfoS("Node is unschedulable, thus not considered as underutilized", "node", klog.KObj(node))
+				return false
+			}
+			return isNodeWithLowUtilization(usage)
+		},
+		func(node *v1.Node, usage NodeUsage) bool {
+			return isNodeAboveTargetUtilization(usage)
+		},
+	)
 
-	klog.V(1).Infof("Criteria for a node under utilization: CPU: %v, Mem: %v, Pods: %v",
+	klog.V(1).InfoS("Criteria for a node under utilization",
-		thresholds[v1.ResourceCPU], thresholds[v1.ResourceMemory], thresholds[v1.ResourcePods])
+		"CPU", thresholds[v1.ResourceCPU], "Mem", thresholds[v1.ResourceMemory], "Pods", thresholds[v1.ResourcePods])
 
 	if len(lowNodes) == 0 {
-		klog.V(1).Infof("No node is underutilized, nothing to do here, you might tune your thresholds further")
+		klog.V(1).InfoS("No node is underutilized, nothing to do here, you might tune your thresholds further")
 		return
 	}
-	klog.V(1).Infof("Total number of underutilized nodes: %v", len(lowNodes))
+	klog.V(1).InfoS("Total number of underutilized nodes", "totalNumber", len(lowNodes))
 
 	if len(lowNodes) < strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes {
-		klog.V(1).Infof("number of nodes underutilized (%v) is less than NumberOfNodes (%v), nothing to do here", 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)
 		return
 	}
 
 	if len(lowNodes) == len(nodes) {
-		klog.V(1).Infof("all nodes are underutilized, nothing to do here")
+		klog.V(1).InfoS("All nodes are underutilized, nothing to do here")
 		return
 	}
 
 	if len(targetNodes) == 0 {
-		klog.V(1).Infof("all nodes are under target utilization, nothing to do here")
+		klog.V(1).InfoS("All nodes are under target utilization, nothing to do here")
 		return
 	}
 
-	klog.V(1).Infof("Criteria for a node above target utilization: CPU: %v, Mem: %v, Pods: %v",
+	klog.V(1).InfoS("Criteria for a node above target utilization",
-		targetThresholds[v1.ResourceCPU], targetThresholds[v1.ResourceMemory], targetThresholds[v1.ResourcePods])
+		"CPU", targetThresholds[v1.ResourceCPU], "Mem", targetThresholds[v1.ResourceMemory], "Pods", targetThresholds[v1.ResourcePods])
-	klog.V(1).Infof("Total number of nodes above target utilization: %v", len(targetNodes))
+
+	klog.V(1).InfoS("Number of nodes above target utilization", "totalNumber", len(targetNodes))
+	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
 
 	evictPodsFromTargetNodes(
 		ctx,
 		targetNodes,
 		lowNodes,
-		targetThresholds,
+		podEvictor,
-		podEvictor)
+		evictable.IsEvictable)
 
-	klog.V(1).Infof("Total number of pods evicted: %v", podEvictor.TotalEvicted())
+	klog.V(1).InfoS("Total number of pods evicted", "evictedPods", podEvictor.TotalEvicted())
 }
 
 // validateStrategyConfig checks if the strategy's config is valid
@@ -163,29 +195,87 @@ func validateThresholds(thresholds api.ResourceThresholds) error {
 	return nil
 }
 
-// classifyNodes classifies the nodes into low-utilization or high-utilization nodes. If a node lies between
+func getNodeUsage(
-// low and high thresholds, it is simply ignored.
+	ctx context.Context,
-func classifyNodes(npm NodePodsMap, thresholds api.ResourceThresholds, targetThresholds api.ResourceThresholds) ([]NodeUsageMap, []NodeUsageMap) {
+	client clientset.Interface,
-	lowNodes, targetNodes := []NodeUsageMap{}, []NodeUsageMap{}
+	nodes []*v1.Node,
-	for node, pods := range npm {
+	lowThreshold, highThreshold api.ResourceThresholds,
-		usage := nodeUtilization(node, pods)
+) []NodeUsage {
-		nuMap := NodeUsageMap{
+	nodeUsageList := []NodeUsage{}
-			node:    node,
+
-			usage:   usage,
+	for _, node := range nodes {
-			allPods: pods,
+		pods, err := podutil.ListPodsOnANode(ctx, client, node)
+		if err != nil {
+			klog.V(2).InfoS("Node will not be processed, error accessing its pods", "node", klog.KObj(node), "err", err)
+			continue
 		}
-		// Check if node is underutilized and if we can schedule pods on it.
+
-		if !nodeutil.IsNodeUnschedulable(node) && isNodeWithLowUtilization(usage, thresholds) {
+		nodeCapacity := node.Status.Capacity
-			klog.V(2).Infof("Node %#v is under utilized with usage: %#v", node.Name, usage)
+		if len(node.Status.Allocatable) > 0 {
-			lowNodes = append(lowNodes, nuMap)
+			nodeCapacity = node.Status.Allocatable
-		} else if isNodeAboveTargetUtilization(usage, targetThresholds) {
+		}
-			klog.V(2).Infof("Node %#v is over utilized with usage: %#v", node.Name, usage)
+
-			targetNodes = append(targetNodes, nuMap)
+		nodeUsageList = append(nodeUsageList, NodeUsage{
-		} else {
+			node:    node,
-			klog.V(2).Infof("Node %#v is appropriately utilized with usage: %#v", node.Name, usage)
+			usage:   nodeUtilization(node, pods),
+			allPods: pods,
+			// A threshold is in percentages but in <0;100> interval.
+			// Performing `threshold * 0.01` will convert <0;100> interval into <0;1>.
+			// Multiplying it with capacity will give fraction of the capacity corresponding to the given high/low resource threshold in Quantity units.
+			lowResourceThreshold: map[v1.ResourceName]*resource.Quantity{
+				v1.ResourceCPU:    resource.NewMilliQuantity(int64(float64(lowThreshold[v1.ResourceCPU])*float64(nodeCapacity.Cpu().MilliValue())*0.01), resource.DecimalSI),
+				v1.ResourceMemory: resource.NewQuantity(int64(float64(lowThreshold[v1.ResourceMemory])*float64(nodeCapacity.Memory().Value())*0.01), resource.BinarySI),
+				v1.ResourcePods:   resource.NewQuantity(int64(float64(lowThreshold[v1.ResourcePods])*float64(nodeCapacity.Pods().Value())*0.01), resource.DecimalSI),
+			},
+			highResourceThreshold: map[v1.ResourceName]*resource.Quantity{
+				v1.ResourceCPU:    resource.NewMilliQuantity(int64(float64(highThreshold[v1.ResourceCPU])*float64(nodeCapacity.Cpu().MilliValue())*0.01), resource.DecimalSI),
+				v1.ResourceMemory: resource.NewQuantity(int64(float64(highThreshold[v1.ResourceMemory])*float64(nodeCapacity.Memory().Value())*0.01), resource.BinarySI),
+				v1.ResourcePods:   resource.NewQuantity(int64(float64(highThreshold[v1.ResourcePods])*float64(nodeCapacity.Pods().Value())*0.01), resource.DecimalSI),
+			},
+		})
+	}
+
+	return nodeUsageList
+}
+
+func resourceUsagePercentages(nodeUsage NodeUsage) map[v1.ResourceName]float64 {
+	nodeCapacity := nodeUsage.node.Status.Capacity
+	if len(nodeUsage.node.Status.Allocatable) > 0 {
+		nodeCapacity = nodeUsage.node.Status.Allocatable
+	}
+
+	resourceUsagePercentage := map[v1.ResourceName]float64{}
+	for resourceName, resourceUsage := range nodeUsage.usage {
+		cap := nodeCapacity[resourceName]
+		if !cap.IsZero() {
+			resourceUsagePercentage[resourceName] = 100 * float64(resourceUsage.Value()) / float64(cap.Value())
 		}
 	}
-	return lowNodes, targetNodes
+
+	return resourceUsagePercentage
+}
+
+// classifyNodes classifies the nodes into low-utilization or high-utilization nodes. If a node lies between
+// low and high thresholds, it is simply ignored.
+func classifyNodes(
+	nodeUsages []NodeUsage,
+	lowThresholdFilter, highThresholdFilter func(node *v1.Node, usage NodeUsage) bool,
+) ([]NodeUsage, []NodeUsage) {
+	lowNodes, highNodes := []NodeUsage{}, []NodeUsage{}
+
+	for _, nodeUsage := range nodeUsages {
+		if lowThresholdFilter(nodeUsage.node, nodeUsage) {
+			klog.V(2).InfoS("Node is underutilized", "node", klog.KObj(nodeUsage.node), "usage", nodeUsage.usage, "usagePercentage", resourceUsagePercentages(nodeUsage))
+			lowNodes = append(lowNodes, nodeUsage)
+		} else if highThresholdFilter(nodeUsage.node, nodeUsage) {
+			klog.V(2).InfoS("Node is overutilized", "node", klog.KObj(nodeUsage.node), "usage", nodeUsage.usage, "usagePercentage", resourceUsagePercentages(nodeUsage))
+			highNodes = append(highNodes, nodeUsage)
+		} else {
+			klog.V(2).InfoS("Node is appropriately utilized", "node", klog.KObj(nodeUsage.node), "usage", nodeUsage.usage, "usagePercentage", resourceUsagePercentages(nodeUsage))
+		}
+	}
+
+	return lowNodes, highNodes
 }
 
 // evictPodsFromTargetNodes evicts pods based on priority, if all the pods on the node have priority, if not
@@ -193,109 +283,112 @@ func classifyNodes(npm NodePodsMap, thresholds api.ResourceThresholds, targetThr
 // TODO: @ravig Break this function into smaller functions.
 func evictPodsFromTargetNodes(
 	ctx context.Context,
-	targetNodes, lowNodes []NodeUsageMap,
+	targetNodes, lowNodes []NodeUsage,
-	targetThresholds api.ResourceThresholds,
 	podEvictor *evictions.PodEvictor,
+	podFilter func(pod *v1.Pod) bool,
 ) {
 
 	sortNodesByUsage(targetNodes)
 
 	// upper bound on total number of pods/cpu/memory to be moved
-	var totalPods, totalCPU, totalMem float64
+	totalAvailableUsage := map[v1.ResourceName]*resource.Quantity{
+		v1.ResourcePods:   {},
+		v1.ResourceCPU:    {},
+		v1.ResourceMemory: {},
+	}
+
 	var taintsOfLowNodes = make(map[string][]v1.Taint, len(lowNodes))
 	for _, node := range lowNodes {
 		taintsOfLowNodes[node.node.Name] = node.node.Spec.Taints
-		nodeCapacity := node.node.Status.Capacity
+
-		if len(node.node.Status.Allocatable) > 0 {
+		for name := range totalAvailableUsage {
-			nodeCapacity = node.node.Status.Allocatable
+			totalAvailableUsage[name].Add(*node.highResourceThreshold[name])
+			totalAvailableUsage[name].Sub(*node.usage[name])
 		}
-		// totalPods to be moved
-		podsPercentage := targetThresholds[v1.ResourcePods] - node.usage[v1.ResourcePods]
-		totalPods += ((float64(podsPercentage) * float64(nodeCapacity.Pods().Value())) / 100)
-
-		// totalCPU capacity to be moved
-		cpuPercentage := targetThresholds[v1.ResourceCPU] - node.usage[v1.ResourceCPU]
-		totalCPU += ((float64(cpuPercentage) * float64(nodeCapacity.Cpu().MilliValue())) / 100)
-
-		// totalMem capacity to be moved
-		memPercentage := targetThresholds[v1.ResourceMemory] - node.usage[v1.ResourceMemory]
-		totalMem += ((float64(memPercentage) * float64(nodeCapacity.Memory().Value())) / 100)
 	}
 
-	klog.V(1).Infof("Total capacity to be moved: CPU:%v, Mem:%v, Pods:%v", totalCPU, totalMem, totalPods)
+	klog.V(1).InfoS(
-	klog.V(1).Infof("********Number of pods evicted from each node:***********")
+		"Total capacity to be moved",
+		"CPU", totalAvailableUsage[v1.ResourceCPU].MilliValue(),
+		"Mem", totalAvailableUsage[v1.ResourceMemory].Value(),
+		"Pods", totalAvailableUsage[v1.ResourcePods].Value(),
+	)
 
 	for _, node := range targetNodes {
-		nodeCapacity := node.node.Status.Capacity
+		klog.V(3).InfoS("Evicting pods from node", "node", klog.KObj(node.node), "usage", node.usage)
-		if len(node.node.Status.Allocatable) > 0 {
-			nodeCapacity = node.node.Status.Allocatable
-		}
-		klog.V(3).Infof("evicting pods from node %#v with usage: %#v", node.node.Name, node.usage)
 
-		nonRemovablePods, removablePods := classifyPods(node.allPods, podEvictor)
+		nonRemovablePods, removablePods := classifyPods(node.allPods, podFilter)
-		klog.V(2).Infof("allPods:%v, nonRemovablePods:%v, removablePods:%v", len(node.allPods), len(nonRemovablePods), len(removablePods))
+		klog.V(2).InfoS("Pods on node", "node", klog.KObj(node.node), "allPods", len(node.allPods), "nonRemovablePods", len(nonRemovablePods), "removablePods", len(removablePods))
 
 		if len(removablePods) == 0 {
-			klog.V(1).Infof("no removable pods on node %#v, try next node", node.node.Name)
+			klog.V(1).InfoS("No removable pods on node, try next node", "node", klog.KObj(node.node))
 			continue
 		}
 
-		klog.V(1).Infof("evicting pods based on priority, if they have same priority, they'll be evicted based on QoS tiers")
+		klog.V(1).InfoS("Evicting pods based on priority, if they have same priority, they'll be evicted based on QoS tiers")
 		// sort the evictable Pods based on priority. This also sorts them based on QoS. If there are multiple pods with same priority, they are sorted based on QoS tiers.
 		podutil.SortPodsBasedOnPriorityLowToHigh(removablePods)
-		evictPods(ctx, removablePods, targetThresholds, nodeCapacity, node.usage, &totalPods, &totalCPU, &totalMem, taintsOfLowNodes, podEvictor, node.node)
+		evictPods(ctx, removablePods, node, totalAvailableUsage, taintsOfLowNodes, podEvictor)
-
+		klog.V(1).InfoS("Evicted pods from node", "node", klog.KObj(node.node), "evictedPods", podEvictor.NodeEvicted(node.node), "usage", node.usage)
-		klog.V(1).Infof("%v pods evicted from node %#v with usage %v", podEvictor.NodeEvicted(node.node), node.node.Name, node.usage)
 	}
 }
 
 func evictPods(
 	ctx context.Context,
 	inputPods []*v1.Pod,
-	targetThresholds api.ResourceThresholds,
+	nodeUsage NodeUsage,
-	nodeCapacity v1.ResourceList,
+	totalAvailableUsage map[v1.ResourceName]*resource.Quantity,
-	nodeUsage api.ResourceThresholds,
-	totalPods *float64,
-	totalCPU *float64,
-	totalMem *float64,
 	taintsOfLowNodes map[string][]v1.Taint,
 	podEvictor *evictions.PodEvictor,
-	node *v1.Node) {
+) {
 	// stop if node utilization drops below target threshold or any of required capacity (cpu, memory, pods) is moved
-	if isNodeAboveTargetUtilization(nodeUsage, targetThresholds) && *totalPods > 0 && *totalCPU > 0 && *totalMem > 0 {
+	continueCond := func() bool {
-		onePodPercentage := api.Percentage((float64(1) * 100) / float64(nodeCapacity.Pods().Value()))
+		if !isNodeAboveTargetUtilization(nodeUsage) {
+			return false
+		}
+		if totalAvailableUsage[v1.ResourcePods].CmpInt64(0) < 1 {
+			return false
+		}
+		if totalAvailableUsage[v1.ResourceCPU].CmpInt64(0) < 1 {
+			return false
+		}
+		if totalAvailableUsage[v1.ResourceMemory].CmpInt64(0) < 1 {
+			return false
+		}
+		return true
+	}
+
+	if continueCond() {
 		for _, pod := range inputPods {
 			if !utils.PodToleratesTaints(pod, taintsOfLowNodes) {
-				klog.V(3).Infof("Skipping eviction for Pod: %#v, doesn't tolerate node taint", pod.Name)
+				klog.V(3).InfoS("Skipping eviction for pod, doesn't tolerate node taint", "pod", klog.KObj(pod))
+
 				continue
 			}
 
-			cUsage := utils.GetResourceRequest(pod, v1.ResourceCPU)
+			success, err := podEvictor.EvictPod(ctx, pod, nodeUsage.node, "LowNodeUtilization")
-			mUsage := utils.GetResourceRequest(pod, v1.ResourceMemory)
-
-			success, err := podEvictor.EvictPod(ctx, pod, node, "LowNodeUtilization")
 			if err != nil {
-				klog.Errorf("Error evicting pod: (%#v)", err)
+				klog.ErrorS(err, "Error evicting pod", "pod", klog.KObj(pod))
 				break
 			}
 
 			if success {
-				klog.V(3).Infof("Evicted pod: %#v", pod.Name)
+				klog.V(3).InfoS("Evicted pods", "pod", klog.KObj(pod), "err", err)
-				// update remaining pods
-				nodeUsage[v1.ResourcePods] -= onePodPercentage
-				*totalPods--
 
-				// update remaining cpu
+				cpuQuantity := utils.GetResourceRequestQuantity(pod, v1.ResourceCPU)
-				*totalCPU -= float64(cUsage)
+				nodeUsage.usage[v1.ResourceCPU].Sub(cpuQuantity)
-				nodeUsage[v1.ResourceCPU] -= api.Percentage((float64(cUsage) * 100) / float64(nodeCapacity.Cpu().MilliValue()))
+				totalAvailableUsage[v1.ResourceCPU].Sub(cpuQuantity)
 
-				// update remaining memory
+				memoryQuantity := utils.GetResourceRequestQuantity(pod, v1.ResourceMemory)
-				*totalMem -= float64(mUsage)
+				nodeUsage.usage[v1.ResourceMemory].Sub(memoryQuantity)
-				nodeUsage[v1.ResourceMemory] -= api.Percentage(float64(mUsage) / float64(nodeCapacity.Memory().Value()) * 100)
+				totalAvailableUsage[v1.ResourceMemory].Sub(memoryQuantity)
 
-				klog.V(3).Infof("updated node usage: %#v", nodeUsage)
+				nodeUsage.usage[v1.ResourcePods].Sub(*resource.NewQuantity(1, resource.DecimalSI))
+				totalAvailableUsage[v1.ResourcePods].Sub(*resource.NewQuantity(1, resource.DecimalSI))
+
+				klog.V(3).InfoS("Updated node usage", "updatedUsage", nodeUsage)
 				// check if node utilization drops below target threshold or any required capacity (cpu, memory, pods) is moved
-				if !isNodeAboveTargetUtilization(nodeUsage, targetThresholds) || *totalPods <= 0 || *totalCPU <= 0 || *totalMem <= 0 {
+				if !continueCond() {
 					break
 				}
 			}
@@ -304,70 +397,45 @@ func evictPods(
 }
 
 // sortNodesByUsage sorts nodes based on usage in descending order
-func sortNodesByUsage(nodes []NodeUsageMap) {
+func sortNodesByUsage(nodes []NodeUsage) {
 	sort.Slice(nodes, func(i, j int) bool {
-		var ti, tj api.Percentage
+		ti := nodes[i].usage[v1.ResourceMemory].Value() + nodes[i].usage[v1.ResourceCPU].MilliValue() + nodes[i].usage[v1.ResourcePods].Value()
-		for name, value := range nodes[i].usage {
+		tj := nodes[j].usage[v1.ResourceMemory].Value() + nodes[j].usage[v1.ResourceCPU].MilliValue() + nodes[j].usage[v1.ResourcePods].Value()
-			if name == v1.ResourceCPU || name == v1.ResourceMemory || name == v1.ResourcePods {
-				ti += value
-			}
-		}
-		for name, value := range nodes[j].usage {
-			if name == v1.ResourceCPU || name == v1.ResourceMemory || name == v1.ResourcePods {
-				tj += value
-			}
-		}
 		// To return sorted in descending order
 		return ti > tj
 	})
 }
 
-// createNodePodsMap returns nodepodsmap with evictable pods on node.
-func createNodePodsMap(ctx context.Context, client clientset.Interface, nodes []*v1.Node) NodePodsMap {
-	npm := NodePodsMap{}
-	for _, node := range nodes {
-		pods, err := podutil.ListPodsOnANode(ctx, client, node, nil)
-		if err != nil {
-			klog.Warningf("node %s will not be processed, error in accessing its pods (%#v)", node.Name, err)
-		} else {
-			npm[node] = pods
-		}
-	}
-	return npm
-}
-
 // isNodeAboveTargetUtilization checks if a node is overutilized
-func isNodeAboveTargetUtilization(nodeThresholds api.ResourceThresholds, thresholds api.ResourceThresholds) bool {
+// At least one resource has to be above the high threshold
-	for name, nodeValue := range nodeThresholds {
+func isNodeAboveTargetUtilization(usage NodeUsage) bool {
-		if name == v1.ResourceCPU || name == v1.ResourceMemory || name == v1.ResourcePods {
+	for name, nodeValue := range usage.usage {
-			if value, ok := thresholds[name]; !ok {
+		// usage.highResourceThreshold[name] < nodeValue
-				continue
+		if usage.highResourceThreshold[name].Cmp(*nodeValue) == -1 {
-			} else if nodeValue > value {
+			return true
-				return true
-			}
 		}
 	}
 	return false
 }
 
 // isNodeWithLowUtilization checks if a node is underutilized
-func isNodeWithLowUtilization(nodeThresholds api.ResourceThresholds, thresholds api.ResourceThresholds) bool {
+// All resources have to be below the low threshold
-	for name, nodeValue := range nodeThresholds {
+func isNodeWithLowUtilization(usage NodeUsage) bool {
-		if name == v1.ResourceCPU || name == v1.ResourceMemory || name == v1.ResourcePods {
+	for name, nodeValue := range usage.usage {
-			if value, ok := thresholds[name]; !ok {
+		// usage.lowResourceThreshold[name] < nodeValue
-				continue
+		if usage.lowResourceThreshold[name].Cmp(*nodeValue) == -1 {
-			} else if nodeValue > value {
+			return false
-				return false
-			}
 		}
 	}
+
 	return true
 }
 
-func nodeUtilization(node *v1.Node, pods []*v1.Pod) api.ResourceThresholds {
+func nodeUtilization(node *v1.Node, pods []*v1.Pod) map[v1.ResourceName]*resource.Quantity {
 	totalReqs := map[v1.ResourceName]*resource.Quantity{
-		v1.ResourceCPU:    {},
+		v1.ResourceCPU:    resource.NewMilliQuantity(0, resource.DecimalSI),
-		v1.ResourceMemory: {},
+		v1.ResourceMemory: resource.NewQuantity(0, resource.BinarySI),
+		v1.ResourcePods:   resource.NewQuantity(int64(len(pods)), resource.DecimalSI),
 	}
 	for _, pod := range pods {
 		req, _ := utils.PodRequestsAndLimits(pod)
@@ -380,24 +448,14 @@ func nodeUtilization(node *v1.Node, pods []*v1.Pod) api.ResourceThresholds {
 		}
 	}
 
-	nodeCapacity := node.Status.Capacity
+	return totalReqs
-	if len(node.Status.Allocatable) > 0 {
-		nodeCapacity = node.Status.Allocatable
-	}
-
-	totalPods := len(pods)
-	return api.ResourceThresholds{
-		v1.ResourceCPU:    api.Percentage((float64(totalReqs[v1.ResourceCPU].MilliValue()) * 100) / float64(nodeCapacity.Cpu().MilliValue())),
-		v1.ResourceMemory: api.Percentage(float64(totalReqs[v1.ResourceMemory].Value()) / float64(nodeCapacity.Memory().Value()) * 100),
-		v1.ResourcePods:   api.Percentage((float64(totalPods) * 100) / float64(nodeCapacity.Pods().Value())),
-	}
 }
 
-func classifyPods(pods []*v1.Pod, evictor *evictions.PodEvictor) ([]*v1.Pod, []*v1.Pod) {
+func classifyPods(pods []*v1.Pod, filter func(pod *v1.Pod) bool) ([]*v1.Pod, []*v1.Pod) {
 	var nonRemovablePods, removablePods []*v1.Pod
 
 	for _, pod := range pods {
-		if !evictor.IsEvictable(pod) {
+		if !filter(pod) {
 			nonRemovablePods = append(nonRemovablePods, pod)
 		} else {
 			removablePods = append(removablePods, pod)

pkg/descheduler/strategies/lownodeutilization_test.go

@@ -25,11 +25,7 @@ import (
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/api/policy/v1beta1"
 	"k8s.io/apimachinery/pkg/api/resource"
-	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/runtime"
-	"k8s.io/apimachinery/pkg/runtime/schema"
-	"k8s.io/apimachinery/pkg/runtime/serializer"
-	"k8s.io/apimachinery/pkg/watch"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
 	"sigs.k8s.io/descheduler/pkg/api"
@@ -225,7 +221,7 @@ func TestLowNodeUtilization(t *testing.T) {
 				},
 				n2NodeName: {
 					Items: []v1.Pod{
-						*test.BuildTestPod("p9", 400, 2100, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p9", 400, 2100, n2NodeName, test.SetRSOwnerRef),
 					},
 				},
 				n3NodeName: {},
@@ -561,11 +557,11 @@ func TestValidateStrategyConfig(t *testing.T) {
 
 		if validateErr == nil || testCase.errInfo == nil {
 			if validateErr != testCase.errInfo {
-				t.Errorf("expected validity of strategy config: thresholds %#v targetThresholds %#v\nto be %v but got %v instead",
+				t.Errorf("expected validity of strategy config: thresholds %#v targetThresholds %#v to be %v but got %v instead",
 					testCase.thresholds, testCase.targetThresholds, testCase.errInfo, validateErr)
 			}
 		} else if validateErr.Error() != testCase.errInfo.Error() {
-			t.Errorf("expected validity of strategy config: thresholds %#v targetThresholds %#v\nto be %v but got %v instead",
+			t.Errorf("expected validity of strategy config: thresholds %#v targetThresholds %#v to be %v but got %v instead",
 				testCase.thresholds, testCase.targetThresholds, testCase.errInfo, validateErr)
 		}
 	}
@@ -642,58 +638,14 @@ func TestValidateThresholds(t *testing.T) {
 
 		if validateErr == nil || test.errInfo == nil {
 			if validateErr != test.errInfo {
-				t.Errorf("expected validity of threshold: %#v\nto be %v but got %v instead", test.input, test.errInfo, validateErr)
+				t.Errorf("expected validity of threshold: %#v to be %v but got %v instead", test.input, test.errInfo, validateErr)
 			}
 		} else if validateErr.Error() != test.errInfo.Error() {
-			t.Errorf("expected validity of threshold: %#v\nto be %v but got %v instead", test.input, test.errInfo, validateErr)
+			t.Errorf("expected validity of threshold: %#v to be %v but got %v instead", test.input, test.errInfo, validateErr)
 		}
 	}
 }
 
-func newFake(objects ...runtime.Object) *core.Fake {
-	scheme := runtime.NewScheme()
-	codecs := serializer.NewCodecFactory(scheme)
-	fake.AddToScheme(scheme)
-	o := core.NewObjectTracker(scheme, codecs.UniversalDecoder())
-	for _, obj := range objects {
-		if err := o.Add(obj); err != nil {
-			panic(err)
-		}
-	}
-
-	fakePtr := core.Fake{}
-	fakePtr.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-		objs, err := o.List(
-			schema.GroupVersionResource{Group: "", Version: "v1", Resource: "pods"},
-			schema.GroupVersionKind{Group: "", Version: "v1", Kind: "Pod"},
-			action.GetNamespace(),
-		)
-		if err != nil {
-			return true, nil, err
-		}
-
-		obj := &v1.PodList{
-			Items: []v1.Pod{},
-		}
-		for _, pod := range objs.(*v1.PodList).Items {
-			podFieldSet := fields.Set(map[string]string{
-				"spec.nodeName": pod.Spec.NodeName,
-				"status.phase":  string(pod.Status.Phase),
-			})
-			match := action.(core.ListAction).GetListRestrictions().Fields.Matches(podFieldSet)
-			if !match {
-				continue
-			}
-			obj.Items = append(obj.Items, *pod.DeepCopy())
-		}
-		return true, obj, nil
-	})
-	fakePtr.AddReactor("*", "*", core.ObjectReaction(o))
-	fakePtr.AddWatchReactor("*", core.DefaultWatchReactor(watch.NewFake(), nil))
-
-	return &fakePtr
-}
-
 func TestWithTaints(t *testing.T) {
 	ctx := context.Background()
 	strategy := api.DeschedulerStrategy{
@@ -803,18 +755,10 @@ func TestWithTaints(t *testing.T) {
 				objs = append(objs, pod)
 			}
 
-			fakePtr := newFake(objs...)
+			fakeClient := fake.NewSimpleClientset(objs...)
-			var evictionCounter int
-			fakePtr.PrependReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				if action.GetSubresource() != "eviction" || action.GetResource().Resource != "pods" {
-					return false, nil, nil
-				}
-				evictionCounter++
-				return true, nil, nil
-			})
 
 			podEvictor := evictions.NewPodEvictor(
-				&fake.Clientset{Fake: *fakePtr},
+				fakeClient,
 				"policy/v1",
 				false,
 				item.evictionsExpected,
@@ -822,10 +766,10 @@ func TestWithTaints(t *testing.T) {
 				false,
 			)
 
-			LowNodeUtilization(ctx, &fake.Clientset{Fake: *fakePtr}, strategy, item.nodes, podEvictor)
+			LowNodeUtilization(ctx, fakeClient, strategy, item.nodes, podEvictor)
 
-			if item.evictionsExpected != evictionCounter {
+			if item.evictionsExpected != podEvictor.TotalEvicted() {
-				t.Errorf("Expected %v evictions, got %v", item.evictionsExpected, evictionCounter)
+				t.Errorf("Expected %v evictions, got %v", item.evictionsExpected, podEvictor.TotalEvicted())
 			}
 		})
 	}

pkg/descheduler/strategies/node_affinity.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	v1 "k8s.io/api/core/v1"
 	clientset "k8s.io/client-go/kubernetes"
@@ -27,44 +28,81 @@ import (
 	"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"
 )
 
+func validatePodsViolatingNodeAffinityParams(params *api.StrategyParameters) error {
+	if params == nil || len(params.NodeAffinityType) == 0 {
+		return fmt.Errorf("NodeAffinityType is empty")
+	}
+	// At most one of include/exclude can be set
+	if params.Namespaces != nil && len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
+	}
+
+	return nil
+}
+
 // 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) {
-	if strategy.Params == nil {
+	if err := validatePodsViolatingNodeAffinityParams(strategy.Params); err != nil {
-		klog.V(1).Infof("NodeAffinityType not set")
+		klog.ErrorS(err, "Invalid RemovePodsViolatingNodeAffinity parameters")
 		return
 	}
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Failed to get threshold priority from strategy's params")
+		return
+	}
+
+	var includedNamespaces, excludedNamespaces []string
+	if strategy.Params.Namespaces != nil {
+		includedNamespaces = strategy.Params.Namespaces.Include
+		excludedNamespaces = strategy.Params.Namespaces.Exclude
+	}
+
+	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
+
 	for _, nodeAffinity := range strategy.Params.NodeAffinityType {
-		klog.V(2).Infof("Executing for nodeAffinityType: %v", nodeAffinity)
+		klog.V(2).InfoS("Executing for nodeAffinityType", "nodeAffinity", nodeAffinity)
 
 		switch nodeAffinity {
 		case "requiredDuringSchedulingIgnoredDuringExecution":
 			for _, node := range nodes {
-				klog.V(1).Infof("Processing node: %#v\n", node.Name)
+				klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
 
-				pods, err := podutil.ListPodsOnANode(ctx, client, node, func(pod *v1.Pod) bool {
+				pods, err := podutil.ListPodsOnANode(
-					return podEvictor.IsEvictable(pod) &&
+					ctx,
-						!nodeutil.PodFitsCurrentNode(pod, node) &&
+					client,
-						nodeutil.PodFitsAnyNode(pod, nodes)
+					node,
-				})
+					podutil.WithFilter(func(pod *v1.Pod) bool {
+						return evictable.IsEvictable(pod) &&
+							!nodeutil.PodFitsCurrentNode(pod, node) &&
+							nodeutil.PodFitsAnyNode(pod, nodes)
+					}),
+					podutil.WithNamespaces(includedNamespaces),
+					podutil.WithoutNamespaces(excludedNamespaces),
+				)
 				if err != nil {
-					klog.Errorf("failed to get pods from %v: %v", node.Name, err)
+					klog.ErrorS(err, "Failed to get pods", "node", klog.KObj(node))
 				}
 
 				for _, pod := range pods {
 					if pod.Spec.Affinity != nil && pod.Spec.Affinity.NodeAffinity != nil && pod.Spec.Affinity.NodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution != nil {
-						klog.V(1).Infof("Evicting pod: %v", pod.Name)
+						klog.V(1).InfoS("Evicting pod", "pod", klog.KObj(pod))
 						if _, err := podEvictor.EvictPod(ctx, pod, node, "NodeAffinity"); err != nil {
-							klog.Errorf("Error evicting pod: (%#v)", err)
+							klog.ErrorS(err, "Error evicting pod")
 							break
 						}
 					}
 				}
 			}
 		default:
-			klog.Errorf("invalid nodeAffinityType: %v", nodeAffinity)
+			klog.ErrorS(nil, "Invalid nodeAffinityType", "nodeAffinity", nodeAffinity)
 		}
 	}
-	klog.V(1).Infof("Evicted %v pods", podEvictor.TotalEvicted())
+	klog.V(1).InfoS("Number of evicted pods", "totalEvicted", podEvictor.TotalEvicted())
 }

pkg/descheduler/strategies/node_taint.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
@@ -29,11 +30,53 @@ import (
 	"k8s.io/klog/v2"
 )
 
+func validateRemovePodsViolatingNodeTaintsParams(params *api.StrategyParameters) error {
+	if params == nil {
+		return 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 fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
+	}
+
+	return nil
+}
+
 // 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) {
+	if err := validateRemovePodsViolatingNodeTaintsParams(strategy.Params); err != nil {
+		klog.ErrorS(err, "Invalid RemovePodsViolatingNodeTaints parameters")
+		return
+	}
+
+	var includedNamespaces, excludedNamespaces []string
+	if strategy.Params != nil && strategy.Params.Namespaces != nil {
+		includedNamespaces = strategy.Params.Namespaces.Include
+		excludedNamespaces = strategy.Params.Namespaces.Exclude
+	}
+
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Failed to get threshold priority from strategy's params")
+		return
+	}
+
+	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
+
 	for _, node := range nodes {
-		klog.V(1).Infof("Processing node: %#v\n", node.Name)
+		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(ctx, client, node, podEvictor.IsEvictable)
+		pods, err := podutil.ListPodsOnANode(
+			ctx,
+			client,
+			node,
+			podutil.WithFilter(evictable.IsEvictable),
+			podutil.WithNamespaces(includedNamespaces),
+			podutil.WithoutNamespaces(excludedNamespaces),
+		)
 		if err != nil {
 			//no pods evicted as error encountered retrieving evictable Pods
 			return
@@ -45,9 +88,9 @@ func RemovePodsViolatingNodeTaints(ctx context.Context, client clientset.Interfa
 				node.Spec.Taints,
 				func(taint *v1.Taint) bool { return taint.Effect == v1.TaintEffectNoSchedule },
 			) {
-				klog.V(2).Infof("Not all taints with NoSchedule effect are tolerated after update for pod %v on node %v", pods[i].Name, node.Name)
+				klog.V(2).InfoS("Not all taints with NoSchedule effect are tolerated after update for pod on node", "pod", klog.KObj(pods[i]), "node", klog.KObj(node))
 				if _, err := podEvictor.EvictPod(ctx, pods[i], node, "NodeTaint"); err != nil {
-					klog.Errorf("Error evicting pod: (%#v)", err)
+					klog.ErrorS(err, "Error evicting pod")
 					break
 				}
 			}

pkg/descheduler/strategies/pod_antiaffinity.go

@@ -18,22 +18,65 @@ package strategies
 
 import (
 	"context"
+	"fmt"
+
 	"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"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
 )
 
+func validateRemovePodsViolatingInterPodAntiAffinityParams(params *api.StrategyParameters) error {
+	if params == nil {
+		return 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 fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
+	}
+
+	return nil
+}
+
 // 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) {
+	if err := validateRemovePodsViolatingInterPodAntiAffinityParams(strategy.Params); err != nil {
+		klog.ErrorS(err, "Invalid RemovePodsViolatingInterPodAntiAffinity parameters")
+		return
+	}
+
+	var includedNamespaces, excludedNamespaces []string
+	if strategy.Params != nil && strategy.Params.Namespaces != nil {
+		includedNamespaces = strategy.Params.Namespaces.Include
+		excludedNamespaces = strategy.Params.Namespaces.Exclude
+	}
+
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Failed to get threshold priority from strategy's params")
+		return
+	}
+
+	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
+
 	for _, node := range nodes {
-		klog.V(1).Infof("Processing node: %#v\n", node.Name)
+		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(ctx, client, node, podEvictor.IsEvictable)
+		pods, err := podutil.ListPodsOnANode(
+			ctx,
+			client,
+			node,
+			podutil.WithNamespaces(includedNamespaces),
+			podutil.WithoutNamespaces(excludedNamespaces),
+		)
 		if err != nil {
 			return
 		}
@@ -41,10 +84,10 @@ func RemovePodsViolatingInterPodAntiAffinity(ctx context.Context, client clients
 		podutil.SortPodsBasedOnPriorityLowToHigh(pods)
 		totalPods := len(pods)
 		for i := 0; i < totalPods; i++ {
-			if checkPodsWithAntiAffinityExist(pods[i], pods) {
+			if checkPodsWithAntiAffinityExist(pods[i], pods) && evictable.IsEvictable(pods[i]) {
 				success, err := podEvictor.EvictPod(ctx, pods[i], node, "InterPodAntiAffinity")
 				if err != nil {
-					klog.Errorf("Error evicting pod: (%#v)", err)
+					klog.ErrorS(err, "Error evicting pod")
 					break
 				}
 
@@ -69,7 +112,7 @@ func checkPodsWithAntiAffinityExist(pod *v1.Pod, pods []*v1.Pod) bool {
 			namespaces := utils.GetNamespacesFromPodAffinityTerm(pod, &term)
 			selector, err := metav1.LabelSelectorAsSelector(term.LabelSelector)
 			if err != nil {
-				klog.Infof("%v", err)
+				klog.ErrorS(err, "Unable to convert LabelSelector into Selector")
 				return false
 			}
 			for _, existingPod := range pods {

pkg/descheduler/strategies/pod_antiaffinity_test.go

@@ -27,6 +27,7 @@ import (
 	core "k8s.io/client-go/testing"
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )
 
@@ -40,10 +41,15 @@ func TestPodAntiAffinity(t *testing.T) {
 	p5 := test.BuildTestPod("p5", 100, 0, node.Name, nil)
 	p6 := test.BuildTestPod("p6", 100, 0, node.Name, nil)
 	p7 := test.BuildTestPod("p7", 100, 0, node.Name, nil)
+	criticalPriority := utils.SystemCriticalPriority
+	nonEvictablePod := test.BuildTestPod("non-evict", 100, 0, node.Name, func(pod *v1.Pod) {
+		pod.Spec.Priority = &criticalPriority
+	})
 	p2.Labels = map[string]string{"foo": "bar"}
 	p5.Labels = map[string]string{"foo": "bar"}
 	p6.Labels = map[string]string{"foo": "bar"}
 	p7.Labels = map[string]string{"foo1": "bar1"}
+	nonEvictablePod.Labels = map[string]string{"foo": "bar"}
 	test.SetNormalOwnerRef(p1)
 	test.SetNormalOwnerRef(p2)
 	test.SetNormalOwnerRef(p3)
@@ -89,6 +95,12 @@ func TestPodAntiAffinity(t *testing.T) {
 			pods:                    []v1.Pod{*p5, *p6, *p7},
 			expectedEvictedPodCount: 1,
 		},
+		{
+			description:             "Evicts pod that conflicts with critical pod (but does not evict critical pod)",
+			maxPodsToEvictPerNode:   1,
+			pods:                    []v1.Pod{*p1, *nonEvictablePod},
+			expectedEvictedPodCount: 1,
+		},
 	}
 
 	for _, test := range tests {

pkg/descheduler/strategies/pod_lifetime.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	v1 "k8s.io/api/core/v1"
 	v1meta "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -27,34 +28,94 @@ import (
 	"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"
 )
 
-// PodLifeTime evicts pods on nodes that were created more than strategy.Params.MaxPodLifeTimeSeconds seconds ago.
+func validatePodLifeTimeParams(params *api.StrategyParameters) error {
-func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+	if params == nil || params.PodLifeTime == nil || params.PodLifeTime.MaxPodLifeTimeSeconds == nil {
-	if strategy.Params == nil || strategy.Params.MaxPodLifeTimeSeconds == nil {
+		return fmt.Errorf("MaxPodLifeTimeSeconds not set")
-		klog.V(1).Infof("MaxPodLifeTimeSeconds not set")
-		return
 	}
 
-	for _, node := range nodes {
+	if params.PodLifeTime.PodStatusPhases != nil {
-		klog.V(1).Infof("Processing node: %#v", node.Name)
+		for _, phase := range params.PodLifeTime.PodStatusPhases {
-		pods := listOldPodsOnNode(ctx, client, node, *strategy.Params.MaxPodLifeTimeSeconds, podEvictor)
+			if phase != string(v1.PodPending) && phase != string(v1.PodRunning) {
-		for _, pod := range pods {
+				return fmt.Errorf("only Pending and Running phases are supported in PodLifeTime")
-			success, err := podEvictor.EvictPod(ctx, pod, node, "PodLifeTime")
-			if success {
-				klog.V(1).Infof("Evicted pod: %#v because it was created more than %v seconds ago", pod.Name, *strategy.Params.MaxPodLifeTimeSeconds)
-			}
-
-			if err != nil {
-				klog.Errorf("Error evicting pod: (%#v)", err)
-				break
 			}
 		}
 	}
+
+	// At most one of include/exclude can be set
+	if params.Namespaces != nil && len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
+	}
+
+	return nil
 }
 
-func listOldPodsOnNode(ctx context.Context, client clientset.Interface, node *v1.Node, maxAge uint, evictor *evictions.PodEvictor) []*v1.Pod {
+// PodLifeTime evicts pods on nodes that were created more than strategy.Params.MaxPodLifeTimeSeconds seconds ago.
-	pods, err := podutil.ListPodsOnANode(ctx, client, node, evictor.IsEvictable)
+func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+	if err := validatePodLifeTimeParams(strategy.Params); err != nil {
+		klog.ErrorS(err, "Invalid PodLifeTime parameters")
+		return
+	}
+
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Failed to get threshold priority from strategy's params")
+		return
+	}
+
+	var includedNamespaces, excludedNamespaces []string
+	if strategy.Params.Namespaces != nil {
+		includedNamespaces = strategy.Params.Namespaces.Include
+		excludedNamespaces = strategy.Params.Namespaces.Exclude
+	}
+
+	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
+
+	filter := evictable.IsEvictable
+	if strategy.Params.PodLifeTime.PodStatusPhases != nil {
+		filter = func(pod *v1.Pod) bool {
+			for _, phase := range strategy.Params.PodLifeTime.PodStatusPhases {
+				if string(pod.Status.Phase) == phase {
+					return evictable.IsEvictable(pod)
+				}
+			}
+			return false
+		}
+	}
+
+	for _, node := range nodes {
+		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
+
+		pods := listOldPodsOnNode(ctx, client, node, includedNamespaces, excludedNamespaces, *strategy.Params.PodLifeTime.MaxPodLifeTimeSeconds, filter)
+		for _, pod := range pods {
+			success, err := podEvictor.EvictPod(ctx, pod, node, "PodLifeTime")
+			if success {
+				klog.V(1).InfoS("Evicted pod because it exceeded its lifetime", "pod", klog.KObj(pod), "maxPodLifeTime", *strategy.Params.PodLifeTime.MaxPodLifeTimeSeconds)
+			}
+
+			if err != nil {
+				klog.ErrorS(err, "Error evicting pod", "pod", klog.KObj(pod))
+				break
+			}
+		}
+
+	}
+}
+
+func listOldPodsOnNode(ctx context.Context, client clientset.Interface, node *v1.Node, includedNamespaces, excludedNamespaces []string, 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),
+	)
 	if err != nil {
 		return nil
 	}
@@ -62,7 +123,7 @@ func listOldPodsOnNode(ctx context.Context, client clientset.Interface, node *v1
 	var oldPods []*v1.Pod
 	for _, pod := range pods {
 		podAgeSeconds := uint(v1meta.Now().Sub(pod.GetCreationTimestamp().Local()).Seconds())
-		if podAgeSeconds > maxAge {
+		if podAgeSeconds > maxPodLifeTimeSeconds {
 			oldPods = append(oldPods, pod)
 		}
 	}

pkg/descheduler/strategies/pod_lifetime_test.go

@@ -85,6 +85,19 @@ func TestPodLifeTime(t *testing.T) {
 	p5.ObjectMeta.OwnerReferences = ownerRef4
 	p6.ObjectMeta.OwnerReferences = ownerRef4
 
+	// Setup two old pods with different status phases
+	p9 := test.BuildTestPod("p9", 100, 0, node.Name, nil)
+	p9.Namespace = "dev"
+	p9.ObjectMeta.CreationTimestamp = olderPodCreationTime
+	p10 := test.BuildTestPod("p10", 100, 0, node.Name, nil)
+	p10.Namespace = "dev"
+	p10.ObjectMeta.CreationTimestamp = olderPodCreationTime
+
+	p9.Status.Phase = "Pending"
+	p10.Status.Phase = "Running"
+	p9.ObjectMeta.OwnerReferences = ownerRef1
+	p10.ObjectMeta.OwnerReferences = ownerRef1
+
 	var maxLifeTime uint = 600
 	testCases := []struct {
 		description             string
@@ -98,7 +111,7 @@ func TestPodLifeTime(t *testing.T) {
 			strategy: api.DeschedulerStrategy{
 				Enabled: true,
 				Params: &api.StrategyParameters{
-					MaxPodLifeTimeSeconds: &maxLifeTime,
+					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
 			maxPodsToEvictPerNode:   5,
@@ -110,7 +123,7 @@ func TestPodLifeTime(t *testing.T) {
 			strategy: api.DeschedulerStrategy{
 				Enabled: true,
 				Params: &api.StrategyParameters{
-					MaxPodLifeTimeSeconds: &maxLifeTime,
+					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
 			maxPodsToEvictPerNode:   5,
@@ -122,7 +135,7 @@ func TestPodLifeTime(t *testing.T) {
 			strategy: api.DeschedulerStrategy{
 				Enabled: true,
 				Params: &api.StrategyParameters{
-					MaxPodLifeTimeSeconds: &maxLifeTime,
+					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
 			maxPodsToEvictPerNode:   5,
@@ -134,13 +147,28 @@ func TestPodLifeTime(t *testing.T) {
 			strategy: api.DeschedulerStrategy{
 				Enabled: true,
 				Params: &api.StrategyParameters{
-					MaxPodLifeTimeSeconds: &maxLifeTime,
+					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
 			maxPodsToEvictPerNode:   5,
 			pods:                    []v1.Pod{*p7, *p8},
 			expectedEvictedPodCount: 0,
 		},
+		{
+			description: "Two old pods with different status phases. 1 should be evicted.",
+			strategy: api.DeschedulerStrategy{
+				Enabled: true,
+				Params: &api.StrategyParameters{
+					PodLifeTime: &api.PodLifeTime{
+						MaxPodLifeTimeSeconds: &maxLifeTime,
+						PodStatusPhases:       []string{"Pending"},
+					},
+				},
+			},
+			maxPodsToEvictPerNode:   5,
+			pods:                    []v1.Pod{*p9, *p10},
+			expectedEvictedPodCount: 1,
+		},
 	}
 
 	for _, tc := range testCases {

pkg/descheduler/strategies/toomanyrestarts.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	v1 "k8s.io/api/core/v1"
 	clientset "k8s.io/client-go/kubernetes"
@@ -26,21 +27,60 @@ import (
 	"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"
 )
 
+func validateRemovePodsHavingTooManyRestartsParams(params *api.StrategyParameters) error {
+	if params == nil || params.PodsHavingTooManyRestarts == nil || params.PodsHavingTooManyRestarts.PodRestartThreshold < 1 {
+		return fmt.Errorf("PodsHavingTooManyRestarts threshold not set")
+	}
+
+	// At most one of include/exclude can be set
+	if params.Namespaces != nil && len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
+	}
+
+	return nil
+}
+
 // 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) {
-	if strategy.Params == nil || strategy.Params.PodsHavingTooManyRestarts == nil || strategy.Params.PodsHavingTooManyRestarts.PodRestartThreshold < 1 {
+	if err := validateRemovePodsHavingTooManyRestartsParams(strategy.Params); err != nil {
-		klog.V(1).Infof("PodsHavingTooManyRestarts thresholds not set")
+		klog.ErrorS(err, "Invalid RemovePodsHavingTooManyRestarts parameters")
 		return
 	}
+
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Failed to get threshold priority from strategy's params")
+		return
+	}
+
+	var includedNamespaces, excludedNamespaces []string
+	if strategy.Params.Namespaces != nil {
+		includedNamespaces = strategy.Params.Namespaces.Include
+		excludedNamespaces = strategy.Params.Namespaces.Exclude
+	}
+
+	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
+
 	for _, node := range nodes {
-		klog.V(1).Infof("Processing node: %s", node.Name)
+		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(ctx, client, node, podEvictor.IsEvictable)
+		pods, err := podutil.ListPodsOnANode(
+			ctx,
+			client,
+			node,
+			podutil.WithFilter(evictable.IsEvictable),
+			podutil.WithNamespaces(includedNamespaces),
+			podutil.WithoutNamespaces(excludedNamespaces),
+		)
 		if err != nil {
-			klog.Errorf("Error when list pods at node %s", node.Name)
+			klog.ErrorS(err, "Error listing a nodes pods", "node", klog.KObj(node))
 			continue
 		}
 
@@ -54,7 +94,7 @@ func RemovePodsHavingTooManyRestarts(ctx context.Context, client clientset.Inter
 				continue
 			}
 			if _, err := podEvictor.EvictPod(ctx, pods[i], node, "TooManyRestarts"); err != nil {
-				klog.Errorf("Error evicting pod: (%#v)", err)
+				klog.ErrorS(err, "Error evicting pod", "pod", klog.KObj(pod))
 				break
 			}
 		}

pkg/descheduler/strategies/topologyspreadconstraint.go

@@ -0,0 +1,381 @@
+/*
+Copyright 2020 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 strategies
+
+import (
+	"context"
+	"fmt"
+	"math"
+	"sort"
+
+	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"
+	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"
+	"sigs.k8s.io/descheduler/pkg/utils"
+)
+
+// AntiAffinityTerm's topology key value used in predicate metadata
+type topologyPair struct {
+	key   string
+	value string
+}
+
+type topology struct {
+	pair topologyPair
+	pods []*v1.Pod
+}
+
+func validateAndParseTopologySpreadParams(ctx context.Context, client clientset.Interface, params *api.StrategyParameters) (int32, sets.String, sets.String, error) {
+	var includedNamespaces, excludedNamespaces sets.String
+	if params == nil {
+		return 0, includedNamespaces, 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 0, includedNamespaces, excludedNamespaces, fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+	if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
+		return 0, includedNamespaces, excludedNamespaces, fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
+	}
+	thresholdPriority, err := utils.GetPriorityFromStrategyParams(ctx, client, params)
+	if err != nil {
+		return 0, includedNamespaces, excludedNamespaces, 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...)
+	}
+
+	return thresholdPriority, includedNamespaces, excludedNamespaces, nil
+}
+
+func RemovePodsViolatingTopologySpreadConstraint(
+	ctx context.Context,
+	client clientset.Interface,
+	strategy api.DeschedulerStrategy,
+	nodes []*v1.Node,
+	podEvictor *evictions.PodEvictor,
+) {
+	thresholdPriority, includedNamespaces, excludedNamespaces, err := validateAndParseTopologySpreadParams(ctx, client, strategy.Params)
+	if err != nil {
+		klog.ErrorS(err, "Invalid PodLifeTime parameters")
+		return
+	}
+
+	nodeMap := make(map[string]*v1.Node, len(nodes))
+	for _, node := range nodes {
+		nodeMap[node.Name] = node
+	}
+	evictable := podEvictor.Evictable(evictions.WithPriorityThreshold(thresholdPriority))
+
+	// 1. for each namespace for which there is Topology Constraint
+	// 2. for each TopologySpreadConstraint in that namespace
+	//  { find all evictable pods in that namespace
+	//  { 3. for each evictable pod in that namespace
+	// 4. If the pod matches this TopologySpreadConstraint LabelSelector
+	// 5. If the pod nodeName is present in the nodeMap
+	// 6. create a topoPair with key as this TopologySpreadConstraint.TopologyKey and value as this pod's Node Label Value for this TopologyKey
+	// 7. add the pod with key as this topoPair
+	// 8. find the min number of pods in any topoPair for this topologyKey
+	// iterate through all topoPairs for this topologyKey and diff currentPods -minPods <=maxSkew
+	// if diff > maxSkew, add this pod in the current bucket for eviction
+
+	// First record all of the constraints by namespace
+	namespaces, err := client.CoreV1().Namespaces().List(ctx, metav1.ListOptions{})
+	if err != nil {
+		klog.ErrorS(err, "Couldn't list namespaces")
+		return
+	}
+	klog.V(1).InfoS("Processing namespaces for topology spread constraints")
+	podsForEviction := make(map[*v1.Pod]struct{})
+	// 1. for each namespace...
+	for _, namespace := range namespaces.Items {
+		if (len(includedNamespaces) > 0 && !includedNamespaces.Has(namespace.Name)) ||
+			(len(excludedNamespaces) > 0 && excludedNamespaces.Has(namespace.Name)) {
+			continue
+		}
+		namespacePods, err := client.CoreV1().Pods(namespace.Name).List(ctx, metav1.ListOptions{})
+		if err != nil {
+			klog.ErrorS(err, "Couldn't list pods in namespace", "namespace", namespace)
+			continue
+		}
+
+		// ...where there is a topology constraint
+		//namespaceTopologySpreadConstrainPods := make([]v1.Pod, 0, len(namespacePods.Items))
+		namespaceTopologySpreadConstraints := make(map[v1.TopologySpreadConstraint]struct{})
+		for _, pod := range namespacePods.Items {
+			for _, constraint := range pod.Spec.TopologySpreadConstraints {
+				// Only deal with hard topology constraints
+				// TODO(@damemi): add support for soft constraints
+				if constraint.WhenUnsatisfiable != v1.DoNotSchedule {
+					continue
+				}
+				namespaceTopologySpreadConstraints[constraint] = struct{}{}
+			}
+		}
+		if len(namespaceTopologySpreadConstraints) == 0 {
+			continue
+		}
+
+		// 2. for each topologySpreadConstraint in that namespace
+		for constraint := range namespaceTopologySpreadConstraints {
+			constraintTopologies := make(map[topologyPair][]*v1.Pod)
+			// pre-populate the topologyPair map with all the topologies available from the nodeMap
+			// (we can't just build it from existing pods' nodes because a topology may have 0 pods)
+			for _, node := range nodeMap {
+				if val, ok := node.Labels[constraint.TopologyKey]; ok {
+					constraintTopologies[topologyPair{key: constraint.TopologyKey, value: val}] = make([]*v1.Pod, 0)
+				}
+			}
+
+			selector, err := metav1.LabelSelectorAsSelector(constraint.LabelSelector)
+			if err != nil {
+				klog.ErrorS(err, "Couldn't parse label selector as selector", "selector", constraint.LabelSelector)
+				continue
+			}
+
+			// 3. for each evictable pod in that namespace
+			// (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 {
+				// 4. if the pod matches this TopologySpreadConstraint LabelSelector
+				if !selector.Matches(labels.Set(namespacePods.Items[i].Labels)) {
+					continue
+				}
+
+				// 5. If the pod's node matches this constraint'selector topologyKey, create a topoPair and add the pod
+				node, ok := nodeMap[namespacePods.Items[i].Spec.NodeName]
+				if !ok {
+					// If ok is false, node is nil in which case node.Labels will panic. In which case a pod is yet to be scheduled. So it's safe to just continue here.
+					continue
+				}
+				nodeValue, ok := node.Labels[constraint.TopologyKey]
+				if !ok {
+					continue
+				}
+				// 6. create a topoPair with key as this TopologySpreadConstraint
+				topoPair := topologyPair{key: constraint.TopologyKey, value: nodeValue}
+				// 7. add the pod with key as this topoPair
+				constraintTopologies[topoPair] = append(constraintTopologies[topoPair], &namespacePods.Items[i])
+				sumPods++
+			}
+			if topologyIsBalanced(constraintTopologies, constraint) {
+				klog.V(2).InfoS("Skipping topology constraint because it is already balanced", "constraint", constraint)
+				continue
+			}
+			balanceDomains(podsForEviction, constraint, constraintTopologies, sumPods, evictable.IsEvictable, nodeMap)
+		}
+	}
+
+	for pod := range podsForEviction {
+		if _, err := podEvictor.EvictPod(ctx, pod, nodeMap[pod.Spec.NodeName], "PodTopologySpread"); err != nil && !evictable.IsEvictable(pod) {
+			klog.ErrorS(err, "Error evicting pod", "pod", klog.KObj(pod))
+			break
+		}
+	}
+}
+
+// topologyIsBalanced checks if any domains in the topology differ by more than the MaxSkew
+// this is called before any sorting or other calculations and is used to skip topologies that don't need to be balanced
+func topologyIsBalanced(topology map[topologyPair][]*v1.Pod, constraint v1.TopologySpreadConstraint) bool {
+	minDomainSize := math.MaxInt32
+	maxDomainSize := math.MinInt32
+	for _, pods := range topology {
+		if len(pods) < minDomainSize {
+			minDomainSize = len(pods)
+		}
+		if len(pods) > maxDomainSize {
+			maxDomainSize = len(pods)
+		}
+		if int32(maxDomainSize-minDomainSize) > constraint.MaxSkew {
+			return false
+		}
+	}
+	return true
+}
+
+// balanceDomains determines how many pods (minimum) should be evicted from large domains to achieve an ideal balance within maxSkew
+// To actually determine how many pods need to be moved, we sort the topology domains in ascending length
+// [2, 5, 3, 8, 5, 7]
+//
+// Would end up like:
+// [2, 3, 5, 5, 7, 8]
+//
+// We then start at i=[0] and j=[len(list)-1] and compare the 2 topology sizes.
+// If the diff of the size of the domains is more than the maxSkew, we will move up to half that skew,
+// or the available pods from the higher domain, or the number required to bring the smaller domain up to the average,
+// whichever number is less.
+//
+// (Note, we will only move as many pods from a domain as possible without bringing it below the ideal average,
+//  and we will not bring any smaller domain above the average)
+// If the diff is within the skew, we move to the next highest domain.
+// If the higher domain can't give any more without falling below the average, we move to the next lowest "high" domain
+//
+// Following this, the above topology domains end up "sorted" as:
+// [5, 5, 5, 5, 5, 5]
+// (assuming even distribution by the scheduler of the evicted pods)
+func balanceDomains(
+	podsForEviction map[*v1.Pod]struct{},
+	constraint v1.TopologySpreadConstraint,
+	constraintTopologies map[topologyPair][]*v1.Pod,
+	sumPods float64,
+	isEvictable func(*v1.Pod) bool,
+	nodeMap map[string]*v1.Node) {
+	idealAvg := sumPods / float64(len(constraintTopologies))
+	sortedDomains := sortDomains(constraintTopologies, isEvictable)
+	// i is the index for belowOrEqualAvg
+	// j is the index for aboveAvg
+	i := 0
+	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 {
+			j--
+		}
+
+		// skew = actual difference between the domains
+		skew := float64(len(sortedDomains[j].pods) - len(sortedDomains[i].pods))
+
+		// if k and j are within the maxSkew of each other, move to next belowOrEqualAvg
+		if int32(skew) <= constraint.MaxSkew {
+			i++
+			continue
+		}
+
+		// the most that can be given from aboveAvg is:
+		// 1. up to half the distance between them, minus MaxSkew, rounded up
+		// 2. how many it has remaining without falling below the average rounded up, or
+		// 3. how many can be added without bringing the smaller domain above the average rounded up,
+		// whichever is less
+		// (This is the basic principle of keeping all sizes within ~skew of the average)
+		aboveAvg := math.Ceil(float64(len(sortedDomains[j].pods)) - idealAvg)
+		belowAvg := math.Ceil(idealAvg - float64(len(sortedDomains[i].pods)))
+		smallestDiff := math.Min(aboveAvg, belowAvg)
+		halfSkew := math.Ceil((skew - float64(constraint.MaxSkew)) / 2)
+		movePods := int(math.Min(smallestDiff, halfSkew))
+		if movePods <= 0 {
+			i++
+			continue
+		}
+
+		// remove pods from the higher topology and add them to the list of pods to be evicted
+		// also (just for tracking), add them to the list of pods in the lower topology
+		aboveToEvict := sortedDomains[j].pods[len(sortedDomains[j].pods)-movePods:]
+		for k := range aboveToEvict {
+			// if the pod has a hard nodeAffinity or nodeSelector that only matches this node,
+			// don't bother evicting it as it will just end up back on the same node
+			// however we still account for it "being evicted" so the algorithm can complete
+			// TODO(@damemi): Since we don't order pods wrt their affinities, we should refactor this to skip the current pod
+			// but still try to get the required # of movePods (instead of just chopping that value off the slice above)
+			if aboveToEvict[k].Spec.NodeSelector != nil ||
+				(aboveToEvict[k].Spec.Affinity != nil &&
+					aboveToEvict[k].Spec.Affinity.NodeAffinity != nil &&
+					aboveToEvict[k].Spec.Affinity.NodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution != nil &&
+					nodesPodFitsOnBesidesCurrent(aboveToEvict[k], nodeMap) == 0) {
+				klog.V(2).InfoS("Ignoring pod for eviction due to node selector/affinity", "pod", klog.KObj(aboveToEvict[k]))
+				continue
+			}
+			podsForEviction[aboveToEvict[k]] = struct{}{}
+		}
+		sortedDomains[j].pods = sortedDomains[j].pods[:len(sortedDomains[j].pods)-movePods]
+		sortedDomains[i].pods = append(sortedDomains[i].pods, aboveToEvict...)
+	}
+}
+
+// nodesPodFitsOnBesidesCurrent counts the number of nodes this pod could fit on based on its affinity
+// It excludes the current node because, for the sake of domain balancing only, we care about if there is any other
+// place it could theoretically fit.
+// If the pod doesn't fit on its current node, that is a job for RemovePodsViolatingNodeAffinity, and irrelevant to Topology Spreading
+func nodesPodFitsOnBesidesCurrent(pod *v1.Pod, nodeMap map[string]*v1.Node) int {
+	count := 0
+	for _, node := range nodeMap {
+		if nodeutil.PodFitsCurrentNode(pod, node) && node != nodeMap[pod.Spec.NodeName] {
+			count++
+		}
+	}
+	return count
+}
+
+// sortDomains sorts and splits the list of topology domains based on their size
+// it also sorts the list of pods within the domains based on their node affinity/selector and priority in the following order:
+// 1. non-evictable pods
+// 2. pods with selectors or affinity
+// 3. pods in descending priority
+// 4. all other pods
+// We then pop pods off the back of the list for eviction
+func sortDomains(constraintTopologyPairs map[topologyPair][]*v1.Pod, isEvictable func(*v1.Pod) bool) []topology {
+	sortedTopologies := make([]topology, 0, len(constraintTopologyPairs))
+	// sort the topologies and return 2 lists: those <= the average and those > the average (> list inverted)
+	for pair, list := range constraintTopologyPairs {
+		// Sort the pods within the domain so that the lowest priority pods are considered first for eviction,
+		// followed by the highest priority,
+		// followed by the lowest priority pods with affinity or nodeSelector,
+		// followed by the highest priority pods with affinity or nodeSelector
+		sort.Slice(list, func(i, j int) bool {
+			// any non-evictable pods should be considered last (ie, first in the list)
+			if !isEvictable(list[i]) || !isEvictable(list[j]) {
+				// false - i is the only non-evictable, so return true to put it first
+				// true - j is non-evictable, so return false to put j before i
+				// if true and both and non-evictable, order doesn't matter
+				return !(isEvictable(list[i]) && !isEvictable(list[j]))
+			}
+
+			// if both pods have selectors/affinity, compare them by their priority
+			if hasSelectorOrAffinity(*list[i]) == hasSelectorOrAffinity(*list[j]) {
+				comparePodsByPriority(list[i], list[j])
+			}
+			return hasSelectorOrAffinity(*list[i]) && !hasSelectorOrAffinity(*list[j])
+		})
+		sortedTopologies = append(sortedTopologies, topology{pair: pair, pods: list})
+	}
+
+	// create an ascending slice of all key-value toplogy pairs
+	sort.Slice(sortedTopologies, func(i, j int) bool {
+		return len(sortedTopologies[i].pods) < len(sortedTopologies[j].pods)
+	})
+
+	return sortedTopologies
+}
+
+func hasSelectorOrAffinity(pod v1.Pod) bool {
+	return pod.Spec.NodeSelector != nil || (pod.Spec.Affinity != nil && pod.Spec.Affinity.NodeAffinity != nil)
+}
+
+// comparePodsByPriority is a helper to the sort function to compare 2 pods based on their priority values
+// It will sort the pods in DESCENDING order of priority, since in our logic we evict pods from the back
+// of the list first.
+func comparePodsByPriority(iPod, jPod *v1.Pod) bool {
+	if iPod.Spec.Priority != nil && jPod.Spec.Priority != nil {
+		// a LOWER priority value should be evicted FIRST
+		return *iPod.Spec.Priority > *jPod.Spec.Priority
+	} else if iPod.Spec.Priority != nil && jPod.Spec.Priority == nil {
+		// i should come before j
+		return true
+	} else if iPod.Spec.Priority == nil && jPod.Spec.Priority != nil {
+		// j should come before i
+		return false
+	} else {
+		// it doesn't matter. just return true
+		return true
+	}
+}

pkg/descheduler/strategies/topologyspreadconstraint_test.go

@@ -0,0 +1,410 @@
+package strategies
+
+import (
+	"context"
+	"fmt"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes/fake"
+	core "k8s.io/client-go/testing"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	"sigs.k8s.io/descheduler/test"
+)
+
+func TestTopologySpreadConstraint(t *testing.T) {
+	ctx := context.Background()
+	testCases := []struct {
+		name                 string
+		pods                 []*v1.Pod
+		expectedEvictedCount int
+		nodes                []*v1.Node
+		strategy             api.DeschedulerStrategy
+		namespaces           []string
+	}{
+		{
+			name: "2 domains, sizes [2,1], maxSkew=1, move 0 pods",
+			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:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           1,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+				},
+				{
+					count:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+				},
+				{
+					count:  1,
+					node:   "n2",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 0,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "2 domains, sizes [3,1], maxSkew=1, move 1 pod to achieve [2,2]",
+			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:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           1,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+				},
+				{
+					count:  2,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+				},
+				{
+					count:  1,
+					node:   "n2",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 1,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "2 domains, sizes [3,1], maxSkew=1, move 1 pod to achieve [2,2], exclude kube-system namespace",
+			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:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           1,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+				},
+				{
+					count:  2,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+				},
+				{
+					count:  1,
+					node:   "n2",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 1,
+			strategy:             api.DeschedulerStrategy{Enabled: true, Params: &api.StrategyParameters{Namespaces: &api.Namespaces{Exclude: []string{"kube-system"}}}},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "2 domains, sizes [5,2], maxSkew=1, move 1 pod to achieve [4,3]",
+			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:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           1,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+				},
+				{
+					count:  4,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+				},
+				{
+					count:  2,
+					node:   "n2",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 1,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "2 domains, sizes [4,0], maxSkew=1, move 2 pods to achieve [2,2]",
+			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:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           1,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+				},
+				{
+					count:  3,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 2,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "2 domains, sizes [4,0], maxSkew=1, only move 1 pod since pods with nodeSelector and nodeAffinity aren't evicted",
+			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:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           1,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+					nodeSelector: map[string]string{"zone": "zoneA"},
+				},
+				{
+					count:        1,
+					node:         "n1",
+					labels:       map[string]string{"foo": "bar"},
+					nodeSelector: map[string]string{"zone": "zoneA"},
+				},
+				{
+					count:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+					nodeAffinity: &v1.Affinity{NodeAffinity: &v1.NodeAffinity{
+						RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{NodeSelectorTerms: []v1.NodeSelectorTerm{
+							{MatchExpressions: []v1.NodeSelectorRequirement{{Key: "foo", Values: []string{"bar"}, Operator: v1.NodeSelectorOpIn}}},
+						}},
+					}},
+				},
+				{
+					count:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 1,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "3 domains, sizes [0, 1, 100], maxSkew=1, move 66 pods to get [34, 33, 34]",
+			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:  1,
+					node:   "n2",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           1,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+				},
+				{
+					count:  100,
+					node:   "n3",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 66,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "4 domains, sizes [0, 1, 3, 5], should move 3 to get [2, 2, 3, 2]",
+			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" }),
+				test.BuildTestNode("n4", 2000, 3000, 10, func(n *v1.Node) { n.Labels["zone"] = "zoneD" }),
+			},
+			pods: createTestPods([]testPodList{
+				{
+					count:  1,
+					node:   "n2",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           1,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+				},
+				{
+					count:  3,
+					node:   "n3",
+					labels: map[string]string{"foo": "bar"},
+				},
+				{
+					count:  5,
+					node:   "n4",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 3,
+			strategy:             api.DeschedulerStrategy{},
+			namespaces:           []string{"ns1"},
+		},
+		{
+			name: "2 domains size [2 6], maxSkew=2, should move 1 to get [3 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" }),
+			},
+			pods: createTestPods([]testPodList{
+				{
+					count:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+					constraints: []v1.TopologySpreadConstraint{
+						{
+							MaxSkew:           2,
+							TopologyKey:       "zone",
+							WhenUnsatisfiable: v1.DoNotSchedule,
+							LabelSelector:     &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+						},
+					},
+				},
+				{
+					count:  1,
+					node:   "n1",
+					labels: map[string]string{"foo": "bar"},
+				},
+				{
+					count:  6,
+					node:   "n2",
+					labels: map[string]string{"foo": "bar"},
+				},
+			}),
+			expectedEvictedCount: 1,
+			strategy:             api.DeschedulerStrategy{},
+			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
+			})
+
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				"v1",
+				false,
+				100,
+				tc.nodes,
+				false,
+			)
+			RemovePodsViolatingTopologySpreadConstraint(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
+			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)
+			}
+		})
+	}
+}
+
+type testPodList struct {
+	count        int
+	node         string
+	labels       map[string]string
+	constraints  []v1.TopologySpreadConstraint
+	nodeSelector map[string]string
+	nodeAffinity *v1.Affinity
+}
+
+func createTestPods(testPods []testPodList) []*v1.Pod {
+	ownerRef1 := test.GetReplicaSetOwnerRefList()
+	pods := make([]*v1.Pod, 0)
+	podNum := 0
+	for _, tp := range testPods {
+		for i := 0; i < tp.count; i++ {
+			pods = append(pods,
+				test.BuildTestPod(fmt.Sprintf("pod-%d", podNum), 100, 0, tp.node, func(p *v1.Pod) {
+					p.Labels = make(map[string]string)
+					p.Labels = tp.labels
+					p.Namespace = "ns1"
+					p.ObjectMeta.OwnerReferences = ownerRef1
+					p.Spec.TopologySpreadConstraints = tp.constraints
+					p.Spec.NodeSelector = tp.nodeSelector
+					p.Spec.Affinity = tp.nodeAffinity
+				}))
+			podNum++
+		}
+	}
+	return pods
+}

pkg/utils/pod.go

@@ -104,23 +104,21 @@ func GetPodSource(pod *v1.Pod) (string, error) {
 	return "", fmt.Errorf("cannot get source of pod %q", pod.UID)
 }
 
-// IsCriticalPod returns true if pod's priority is greater than or equal to SystemCriticalPriority.
+// IsCriticalPod returns true if the pod is a static or mirror pod.
 func IsCriticalPod(pod *v1.Pod) bool {
 	if IsStaticPod(pod) {
 		return true
 	}
+
 	if IsMirrorPod(pod) {
 		return true
 	}
-	if pod.Spec.Priority != nil && IsCriticalPodBasedOnPriority(*pod.Spec.Priority) {
+
+	if pod.Spec.Priority != nil && *pod.Spec.Priority >= SystemCriticalPriority {
 		return true
 	}
-	return false
-}
 
-// IsCriticalPodBasedOnPriority checks if the given pod is a critical pod based on priority resolved from pod Spec.
+	return false
-func IsCriticalPodBasedOnPriority(priority int32) bool {
-	return priority >= SystemCriticalPriority
 }
 
 // PodRequestsAndLimits returns a dictionary of all defined resources summed up for all
@@ -188,7 +186,7 @@ func PodToleratesTaints(pod *v1.Pod, taintsOfNodes map[string][]v1.Taint) bool {
 		if len(pod.Spec.Tolerations) >= len(taintsForNode) && TolerationsTolerateTaintsWithFilter(pod.Spec.Tolerations, taintsForNode, nil) {
 			return true
 		}
-		klog.V(5).Infof("pod: %#v doesn't tolerate node %s's taints", pod.Name, nodeName)
+		klog.V(5).InfoS("Pod doesn't tolerate nodes taint", "pod", klog.KObj(pod), "nodeName", nodeName)
 	}
 
 	return false

pkg/utils/predicates.go

@@ -21,7 +21,7 @@ import (
 
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/labels"
-	"k8s.io/apimachinery/pkg/selection"
+	"k8s.io/component-helpers/scheduling/corev1"
 	"k8s.io/klog/v2"
 )
 
@@ -69,64 +69,17 @@ func podMatchesNodeLabels(pod *v1.Pod, node *v1.Node) bool {
 
 		// Match node selector for requiredDuringSchedulingIgnoredDuringExecution.
 		if nodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution != nil {
-			nodeSelectorTerms := nodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution.NodeSelectorTerms
+			klog.V(10).InfoS("Match for RequiredDuringSchedulingIgnoredDuringExecution node selector", "selector", nodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution)
-			klog.V(10).Infof("Match for RequiredDuringSchedulingIgnoredDuringExecution node selector terms %+v", nodeSelectorTerms)
+			matches, err := corev1.MatchNodeSelectorTerms(node, nodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution)
-			return nodeMatchesNodeSelectorTerms(node, nodeSelectorTerms)
+			if err != nil {
+				klog.ErrorS(err, "error parsing node selector", "selector", nodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution)
+			}
+			return matches
 		}
 	}
 	return true
 }
 
-// nodeMatchesNodeSelectorTerms checks if a node's labels satisfy a list of node selector terms,
-// terms are ORed, and an empty list of terms will match nothing.
-func nodeMatchesNodeSelectorTerms(node *v1.Node, nodeSelectorTerms []v1.NodeSelectorTerm) bool {
-	for _, req := range nodeSelectorTerms {
-		nodeSelector, err := NodeSelectorRequirementsAsSelector(req.MatchExpressions)
-		if err != nil {
-			klog.V(10).Infof("Failed to parse MatchExpressions: %+v, regarding as not match.", req.MatchExpressions)
-			return false
-		}
-		if nodeSelector.Matches(labels.Set(node.Labels)) {
-			return true
-		}
-	}
-	return false
-}
-
-// NodeSelectorRequirementsAsSelector converts the []NodeSelectorRequirement api type into a struct that implements
-// labels.Selector.
-func NodeSelectorRequirementsAsSelector(nsm []v1.NodeSelectorRequirement) (labels.Selector, error) {
-	if len(nsm) == 0 {
-		return labels.Nothing(), nil
-	}
-	selector := labels.NewSelector()
-	for _, expr := range nsm {
-		var op selection.Operator
-		switch expr.Operator {
-		case v1.NodeSelectorOpIn:
-			op = selection.In
-		case v1.NodeSelectorOpNotIn:
-			op = selection.NotIn
-		case v1.NodeSelectorOpExists:
-			op = selection.Exists
-		case v1.NodeSelectorOpDoesNotExist:
-			op = selection.DoesNotExist
-		case v1.NodeSelectorOpGt:
-			op = selection.GreaterThan
-		case v1.NodeSelectorOpLt:
-			op = selection.LessThan
-		default:
-			return nil, fmt.Errorf("%q is not a valid node selector operator", expr.Operator)
-		}
-		r, err := labels.NewRequirement(expr.Key, op, expr.Values)
-		if err != nil {
-			return nil, err
-		}
-		selector = selector.Add(*r)
-	}
-	return selector, nil
-}
-
 // TolerationsTolerateTaint checks if taint is tolerated by any of the tolerations.
 func TolerationsTolerateTaint(tolerations []v1.Toleration, taint *v1.Taint) bool {
 	for i := range tolerations {

pkg/utils/priority.go

@@ -1,9 +1,15 @@
 package utils
 
 import (
+	"context"
+	"fmt"
+
 	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"
+	clientset "k8s.io/client-go/kubernetes"
+	"sigs.k8s.io/descheduler/pkg/api"
 )
 
 const SystemCriticalPriority = 2 * int32(1000000000)
@@ -33,3 +39,36 @@ func PodMatchesTermsNamespaceAndSelector(pod *v1.Pod, namespaces sets.String, se
 	}
 	return true
 }
+
+// GetPriorityFromPriorityClass gets priority from the given priority class.
+// If no priority class is provided, it will return SystemCriticalPriority by default.
+func GetPriorityFromPriorityClass(ctx context.Context, client clientset.Interface, name string) (int32, error) {
+	if name != "" {
+		priorityClass, err := client.SchedulingV1().PriorityClasses().Get(ctx, name, metav1.GetOptions{})
+		if err != nil {
+			return 0, err
+		}
+		return priorityClass.Value, nil
+	}
+	return SystemCriticalPriority, nil
+}
+
+// GetPriorityFromStrategyParams gets priority from the given StrategyParameters.
+// It will return SystemCriticalPriority by default.
+func GetPriorityFromStrategyParams(ctx context.Context, client clientset.Interface, params *api.StrategyParameters) (priority int32, err error) {
+	if params == nil {
+		return SystemCriticalPriority, nil
+	}
+	if params.ThresholdPriority != nil {
+		priority = *params.ThresholdPriority
+	} else {
+		priority, err = GetPriorityFromPriorityClass(ctx, client, params.ThresholdPriorityClassName)
+		if err != nil {
+			return
+		}
+	}
+	if priority > SystemCriticalPriority {
+		return 0, fmt.Errorf("Priority threshold can't be greater than %d", SystemCriticalPriority)
+	}
+	return
+}

test/e2e/e2e_test.go

@@ -20,13 +20,16 @@ import (
 	"context"
 	"math"
 	"os"
+	"sort"
 	"strings"
 	"testing"
 	"time"
 
 	v1 "k8s.io/api/core/v1"
+	schedulingv1 "k8s.io/api/scheduling/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"
 	"k8s.io/client-go/informers"
 	coreinformers "k8s.io/client-go/informers/core/v1"
@@ -45,7 +48,7 @@ import (
 	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
 )
 
-func MakePodSpec() v1.PodSpec {
+func MakePodSpec(priorityClassName string) v1.PodSpec {
 	return v1.PodSpec{
 		Containers: []v1.Container{{
 			Name:            "pause",
@@ -63,11 +66,12 @@ func MakePodSpec() v1.PodSpec {
 				},
 			},
 		}},
+		PriorityClassName: priorityClassName,
 	}
 }
 
 // RcByNameContainer returns a ReplicationControoler with specified name and container
-func RcByNameContainer(name, namespace string, replicas int32, labels map[string]string, gracePeriod *int64) *v1.ReplicationController {
+func RcByNameContainer(name, namespace string, replicas int32, labels map[string]string, gracePeriod *int64, priorityClassName string) *v1.ReplicationController {
 	zeroGracePeriod := int64(0)
 
 	// Add "name": name to the labels, overwriting if it exists.
@@ -93,7 +97,7 @@ func RcByNameContainer(name, namespace string, replicas int32, labels map[string
 				ObjectMeta: metav1.ObjectMeta{
 					Labels: labels,
 				},
-				Spec: MakePodSpec(),
+				Spec: MakePodSpec(priorityClassName),
 			},
 		},
 	}
@@ -134,23 +138,29 @@ func startEndToEndForLowNodeUtilization(ctx context.Context, clientset clientset
 	time.Sleep(10 * time.Second)
 }
 
-func TestLowNodeUtilization(t *testing.T) {
+func initializeClient(t *testing.T) (clientset.Interface, coreinformers.NodeInformer, chan struct{}) {
-	ctx := context.Background()
-
 	clientSet, err := client.CreateClient(os.Getenv("KUBECONFIG"))
 	if err != nil {
 		t.Errorf("Error during client creation with %v", err)
 	}
 
-	stopChannel := make(chan struct{}, 0)
+	stopChannel := make(chan struct{})
 
 	sharedInformerFactory := informers.NewSharedInformerFactory(clientSet, 0)
 	sharedInformerFactory.Start(stopChannel)
 	sharedInformerFactory.WaitForCacheSync(stopChannel)
-	defer close(stopChannel)
 
 	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
 
+	return clientSet, nodeInformer, stopChannel
+}
+
+func TestLowNodeUtilization(t *testing.T) {
+	ctx := context.Background()
+
+	clientSet, nodeInformer, 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)
@@ -168,7 +178,7 @@ func TestLowNodeUtilization(t *testing.T) {
 	}
 	defer clientSet.CoreV1().Namespaces().Delete(ctx, testNamespace.Name, metav1.DeleteOptions{})
 
-	rc := RcByNameContainer("test-rc-node-utilization", testNamespace.Name, int32(15), map[string]string{"test": "node-utilization"}, nil)
+	rc := RcByNameContainer("test-rc-node-utilization", testNamespace.Name, int32(15), map[string]string{"test": "node-utilization"}, nil, "")
 	if _, err := clientSet.CoreV1().ReplicationControllers(rc.Namespace).Create(ctx, rc, metav1.CreateOptions{}); err != nil {
 		t.Errorf("Error creating deployment %v", err)
 	}
@@ -177,22 +187,340 @@ func TestLowNodeUtilization(t *testing.T) {
 	deleteRC(ctx, t, clientSet, rc)
 }
 
+func runPodLifetimeStrategy(ctx context.Context, clientset clientset.Interface, nodeInformer coreinformers.NodeInformer, namespaces *deschedulerapi.Namespaces, priorityClass string, priority *int32) {
+	// Run descheduler.
+	evictionPolicyGroupVersion, err := eutils.SupportEviction(clientset)
+	if err != nil || len(evictionPolicyGroupVersion) == 0 {
+		klog.Fatalf("%v", err)
+	}
+
+	nodes, err := nodeutil.ReadyNodes(ctx, clientset, nodeInformer, "", nil)
+	if err != nil {
+		klog.Fatalf("%v", err)
+	}
+
+	maxPodLifeTimeSeconds := uint(1)
+	strategies.PodLifeTime(
+		ctx,
+		clientset,
+		deschedulerapi.DeschedulerStrategy{
+			Enabled: true,
+			Params: &deschedulerapi.StrategyParameters{
+				PodLifeTime:                &deschedulerapi.PodLifeTime{MaxPodLifeTimeSeconds: &maxPodLifeTimeSeconds},
+				Namespaces:                 namespaces,
+				ThresholdPriority:          priority,
+				ThresholdPriorityClassName: priorityClass,
+			},
+		},
+		nodes,
+		evictions.NewPodEvictor(
+			clientset,
+			evictionPolicyGroupVersion,
+			false,
+			0,
+			nodes,
+			false,
+		),
+	)
+}
+
+func getPodNames(pods []v1.Pod) []string {
+	names := []string{}
+	for _, pod := range pods {
+		names = append(names, pod.Name)
+	}
+	return names
+}
+
+func intersectStrings(lista, listb []string) []string {
+	commonNames := []string{}
+
+	for _, stra := range lista {
+		for _, strb := range listb {
+			if stra == strb {
+				commonNames = append(commonNames, stra)
+				break
+			}
+		}
+	}
+
+	return commonNames
+}
+
+// TODO(jchaloup): add testcases for two included/excluded namespaces
+
+func TestNamespaceConstraintsInclude(t *testing.T) {
+	ctx := context.Background()
+
+	clientSet, nodeInformer, stopCh := initializeClient(t)
+	defer close(stopCh)
+
+	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{})
+
+	rc := RcByNameContainer("test-rc-podlifetime", testNamespace.Name, 5, map[string]string{"test": "podlifetime-include"}, nil, "")
+	if _, err := clientSet.CoreV1().ReplicationControllers(rc.Namespace).Create(ctx, rc, metav1.CreateOptions{}); err != nil {
+		t.Errorf("Error creating deployment %v", err)
+	}
+	defer deleteRC(ctx, t, clientSet, rc)
+
+	// wait for a while so all the pods are at least few seconds older
+	time.Sleep(5 * time.Second)
+
+	// it's assumed all new pods are named differently from currently running -> no name collision
+	podList, err := clientSet.CoreV1().Pods(rc.Namespace).List(ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rc.Spec.Template.Labels).String()})
+	if err != nil {
+		t.Fatalf("Unable to list pods: %v", err)
+	}
+
+	if len(podList.Items) != 5 {
+		t.Fatalf("Expected 5 replicas, got %v instead", len(podList.Items))
+	}
+
+	initialPodNames := getPodNames(podList.Items)
+	sort.Strings(initialPodNames)
+	t.Logf("Existing pods: %v", initialPodNames)
+
+	t.Logf("set the strategy to delete pods from %v namespace", rc.Namespace)
+	runPodLifetimeStrategy(ctx, clientSet, nodeInformer, &deschedulerapi.Namespaces{
+		Include: []string{rc.Namespace},
+	}, "", nil)
+
+	// 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) {
+		podList, err := clientSet.CoreV1().Pods(rc.Namespace).List(ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rc.Spec.Template.Labels).String()})
+		if err != nil {
+			return false, nil
+		}
+
+		includePodNames := getPodNames(podList.Items)
+		// validate all pod were deleted
+		if len(intersectStrings(initialPodNames, includePodNames)) > 0 {
+			t.Logf("Waiting until %v pods get deleted", intersectStrings(initialPodNames, includePodNames))
+			// check if there's at least one pod not in Terminating state
+			for _, pod := range podList.Items {
+				// In case podList contains newly created pods
+				if len(intersectStrings(initialPodNames, []string{pod.Name})) == 0 {
+					continue
+				}
+				if pod.DeletionTimestamp == nil {
+					t.Logf("Pod %v not in terminating state", pod.Name)
+					return false, nil
+				}
+			}
+			t.Logf("All %v pods are terminating", intersectStrings(initialPodNames, includePodNames))
+		}
+
+		return true, nil
+	}); err != nil {
+		t.Fatalf("Error waiting for pods to be deleted: %v", err)
+	}
+}
+
+func TestNamespaceConstraintsExclude(t *testing.T) {
+	ctx := context.Background()
+
+	clientSet, nodeInformer, stopCh := initializeClient(t)
+	defer close(stopCh)
+
+	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{})
+
+	rc := RcByNameContainer("test-rc-podlifetime", testNamespace.Name, 5, map[string]string{"test": "podlifetime-exclude"}, nil, "")
+	if _, err := clientSet.CoreV1().ReplicationControllers(rc.Namespace).Create(ctx, rc, metav1.CreateOptions{}); err != nil {
+		t.Errorf("Error creating deployment %v", err)
+	}
+	defer deleteRC(ctx, t, clientSet, rc)
+
+	// wait for a while so all the pods are at least few seconds older
+	time.Sleep(5 * time.Second)
+
+	// it's assumed all new pods are named differently from currently running -> no name collision
+	podList, err := clientSet.CoreV1().Pods(rc.Namespace).List(ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rc.Spec.Template.Labels).String()})
+	if err != nil {
+		t.Fatalf("Unable to list pods: %v", err)
+	}
+
+	if len(podList.Items) != 5 {
+		t.Fatalf("Expected 5 replicas, got %v instead", len(podList.Items))
+	}
+
+	initialPodNames := getPodNames(podList.Items)
+	sort.Strings(initialPodNames)
+	t.Logf("Existing pods: %v", initialPodNames)
+
+	t.Logf("set the strategy to delete pods from namespaces except the %v namespace", rc.Namespace)
+	runPodLifetimeStrategy(ctx, clientSet, nodeInformer, &deschedulerapi.Namespaces{
+		Exclude: []string{rc.Namespace},
+	}, "", nil)
+
+	t.Logf("Waiting 10s")
+	time.Sleep(10 * time.Second)
+	podList, err = clientSet.CoreV1().Pods(rc.Namespace).List(ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rc.Spec.Template.Labels).String()})
+	if err != nil {
+		t.Fatalf("Unable to list pods after running strategy: %v", err)
+	}
+
+	excludePodNames := getPodNames(podList.Items)
+	sort.Strings(excludePodNames)
+	t.Logf("Existing pods: %v", excludePodNames)
+
+	// validate no pods were deleted
+	if len(intersectStrings(initialPodNames, excludePodNames)) != 5 {
+		t.Fatalf("None of %v pods are expected to be deleted", initialPodNames)
+	}
+}
+
+func TestThresholdPriority(t *testing.T) {
+	testPriority(t, false)
+}
+
+func TestThresholdPriorityClass(t *testing.T) {
+	testPriority(t, true)
+}
+
+func testPriority(t *testing.T, isPriorityClass bool) {
+	var highPriority = int32(1000)
+	var lowPriority = int32(500)
+	ctx := context.Background()
+
+	clientSet, nodeInformer, stopCh := initializeClient(t)
+	defer close(stopCh)
+
+	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{})
+
+	// create two priority classes
+	highPriorityClass := &schedulingv1.PriorityClass{
+		ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name()) + "-highpriority"},
+		Value:      highPriority,
+	}
+	if _, err := clientSet.SchedulingV1().PriorityClasses().Create(ctx, highPriorityClass, metav1.CreateOptions{}); err != nil {
+		t.Fatalf("Error creating priorityclass %s: %v", highPriorityClass.Name, err)
+	}
+	defer clientSet.SchedulingV1().PriorityClasses().Delete(ctx, highPriorityClass.Name, metav1.DeleteOptions{})
+
+	lowPriorityClass := &schedulingv1.PriorityClass{
+		ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name()) + "-lowpriority"},
+		Value:      lowPriority,
+	}
+	if _, err := clientSet.SchedulingV1().PriorityClasses().Create(ctx, lowPriorityClass, metav1.CreateOptions{}); err != nil {
+		t.Fatalf("Error creating priorityclass %s: %v", lowPriorityClass.Name, err)
+	}
+	defer clientSet.SchedulingV1().PriorityClasses().Delete(ctx, lowPriorityClass.Name, metav1.DeleteOptions{})
+
+	// create two RCs with different priority classes in the same namespace
+	rcHighPriority := RcByNameContainer("test-rc-podlifetime-highpriority", testNamespace.Name, 5,
+		map[string]string{"test": "podlifetime-highpriority"}, nil, highPriorityClass.Name)
+	if _, err := clientSet.CoreV1().ReplicationControllers(rcHighPriority.Namespace).Create(ctx, rcHighPriority, metav1.CreateOptions{}); err != nil {
+		t.Errorf("Error creating rc %s: %v", rcHighPriority.Name, err)
+	}
+	defer deleteRC(ctx, t, clientSet, rcHighPriority)
+
+	rcLowPriority := RcByNameContainer("test-rc-podlifetime-lowpriority", testNamespace.Name, 5,
+		map[string]string{"test": "podlifetime-lowpriority"}, nil, lowPriorityClass.Name)
+	if _, err := clientSet.CoreV1().ReplicationControllers(rcLowPriority.Namespace).Create(ctx, rcLowPriority, metav1.CreateOptions{}); err != nil {
+		t.Errorf("Error creating rc %s: %v", rcLowPriority.Name, err)
+	}
+	defer deleteRC(ctx, t, clientSet, rcLowPriority)
+
+	// wait for a while so all the pods are at least few seconds older
+	time.Sleep(5 * time.Second)
+
+	// it's assumed all new pods are named differently from currently running -> no name collision
+	podListHighPriority, err := clientSet.CoreV1().Pods(rcHighPriority.Namespace).List(
+		ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rcHighPriority.Spec.Template.Labels).String()})
+	if err != nil {
+		t.Fatalf("Unable to list pods: %v", err)
+	}
+	podListLowPriority, err := clientSet.CoreV1().Pods(rcLowPriority.Namespace).List(
+		ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rcLowPriority.Spec.Template.Labels).String()})
+	if err != nil {
+		t.Fatalf("Unable to list pods: %v", err)
+	}
+
+	if len(podListHighPriority.Items)+len(podListLowPriority.Items) != 10 {
+		t.Fatalf("Expected 10 replicas, got %v instead", len(podListHighPriority.Items)+len(podListLowPriority.Items))
+	}
+
+	expectReservePodNames := getPodNames(podListHighPriority.Items)
+	expectEvictPodNames := getPodNames(podListLowPriority.Items)
+	sort.Strings(expectReservePodNames)
+	sort.Strings(expectEvictPodNames)
+	t.Logf("Pods not expect to be evicted: %v, pods expect to be evicted: %v", expectReservePodNames, expectEvictPodNames)
+
+	if isPriorityClass {
+		t.Logf("set the strategy to delete pods with priority lower than priority class %s", highPriorityClass.Name)
+		runPodLifetimeStrategy(ctx, clientSet, nodeInformer, nil, highPriorityClass.Name, nil)
+	} else {
+		t.Logf("set the strategy to delete pods with priority lower than %d", highPriority)
+		runPodLifetimeStrategy(ctx, clientSet, nodeInformer, nil, "", &highPriority)
+	}
+
+	t.Logf("Waiting 10s")
+	time.Sleep(10 * time.Second)
+	// check if all pods with high priority class are not evicted
+	podListHighPriority, err = clientSet.CoreV1().Pods(rcHighPriority.Namespace).List(
+		ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rcHighPriority.Spec.Template.Labels).String()})
+	if err != nil {
+		t.Fatalf("Unable to list pods after running strategy: %v", err)
+	}
+
+	excludePodNames := getPodNames(podListHighPriority.Items)
+	sort.Strings(excludePodNames)
+	t.Logf("Existing high priority pods: %v", excludePodNames)
+
+	// validate no pods were deleted
+	if len(intersectStrings(expectReservePodNames, excludePodNames)) != 5 {
+		t.Fatalf("None of %v high priority pods are expected to be deleted", expectReservePodNames)
+	}
+
+	//check if all pods with low priority class are evicted
+	if err := wait.PollImmediate(time.Second, 20*time.Second, func() (bool, error) {
+		podListLowPriority, err := clientSet.CoreV1().Pods(rcLowPriority.Namespace).List(
+			ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rcLowPriority.Spec.Template.Labels).String()})
+		if err != nil {
+			return false, nil
+		}
+
+		includePodNames := getPodNames(podListLowPriority.Items)
+		// validate all pod were deleted
+		if len(intersectStrings(expectEvictPodNames, includePodNames)) > 0 {
+			t.Logf("Waiting until %v low priority pods get deleted", intersectStrings(expectEvictPodNames, includePodNames))
+			// check if there's at least one pod not in Terminating state
+			for _, pod := range podListLowPriority.Items {
+				// In case podList contains newly created pods
+				if len(intersectStrings(expectEvictPodNames, []string{pod.Name})) == 0 {
+					continue
+				}
+				if pod.DeletionTimestamp == nil {
+					t.Logf("Pod %v not in terminating state", pod.Name)
+					return false, nil
+				}
+			}
+			t.Logf("All %v pods are terminating", intersectStrings(expectEvictPodNames, includePodNames))
+		}
+
+		return true, nil
+	}); err != nil {
+		t.Fatalf("Error waiting for pods to be deleted: %v", err)
+	}
+}
+
 func TestEvictAnnotation(t *testing.T) {
 	ctx := context.Background()
 
-	clientSet, err := client.CreateClient(os.Getenv("KUBECONFIG"))
+	clientSet, nodeInformer, stopCh := initializeClient(t)
-	if err != nil {
+	defer close(stopCh)
-		t.Errorf("Error during client creation with %v", err)
-	}
-
-	stopChannel := make(chan struct{}, 0)
-
-	sharedInformerFactory := informers.NewSharedInformerFactory(clientSet, 0)
-	sharedInformerFactory.Start(stopChannel)
-	sharedInformerFactory.WaitForCacheSync(stopChannel)
-	defer close(stopChannel)
-
-	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
 
 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
 	if err != nil {
@@ -211,7 +539,7 @@ func TestEvictAnnotation(t *testing.T) {
 	}
 	defer clientSet.CoreV1().Namespaces().Delete(ctx, testNamespace.Name, metav1.DeleteOptions{})
 
-	rc := RcByNameContainer("test-rc-evict-annotation", testNamespace.Name, int32(15), map[string]string{"test": "annotation"}, nil)
+	rc := RcByNameContainer("test-rc-evict-annotation", testNamespace.Name, int32(15), map[string]string{"test": "annotation"}, nil, "")
 	rc.Spec.Template.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
 	rc.Spec.Template.Spec.Volumes = []v1.Volume{
 		{
@@ -239,7 +567,10 @@ func TestDeschedulingInterval(t *testing.T) {
 	}
 
 	// By default, the DeschedulingInterval param should be set to 0, meaning Descheduler only runs once then exits
-	s := options.NewDeschedulerServer()
+	s, err := options.NewDeschedulerServer()
+	if err != nil {
+		t.Fatalf("Unable to initialize server: %v", err)
+	}
 	s.Client = clientSet
 
 	deschedulerPolicy := &api.DeschedulerPolicy{}
@@ -324,7 +655,7 @@ func evictPods(ctx context.Context, t *testing.T, clientSet clientset.Interface,
 			continue
 		}
 		// List all the pods on the current Node
-		podsOnANode, err := podutil.ListPodsOnANode(ctx, clientSet, node, podEvictor.IsEvictable)
+		podsOnANode, err := podutil.ListPodsOnANode(ctx, clientSet, node, podutil.WithFilter(podEvictor.Evictable().IsEvictable))
 		if err != nil {
 			t.Errorf("Error listing pods on a node %v", err)
 		}
@@ -336,7 +667,7 @@ func evictPods(ctx context.Context, t *testing.T, clientSet clientset.Interface,
 	}
 	t.Log("Eviction of pods starting")
 	startEndToEndForLowNodeUtilization(ctx, clientSet, nodeInformer, podEvictor)
-	podsOnleastUtilizedNode, err := podutil.ListPodsOnANode(ctx, clientSet, leastLoadedNode, podEvictor.IsEvictable)
+	podsOnleastUtilizedNode, err := podutil.ListPodsOnANode(ctx, clientSet, leastLoadedNode, podutil.WithFilter(podEvictor.Evictable().IsEvictable))
 	if err != nil {
 		t.Errorf("Error listing pods on a node %v", err)
 	}

test/run-e2e-tests.sh

@@ -18,7 +18,7 @@
 if [ -n "$KIND_E2E" ]; then
     K8S_VERSION=${KUBERNETES_VERSION:-v1.18.2}
     curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/${K8S_VERSION}/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/
-    wget https://github.com/kubernetes-sigs/kind/releases/download/v0.8.1/kind-linux-amd64
+    wget https://github.com/kubernetes-sigs/kind/releases/download/v0.9.0/kind-linux-amd64
     chmod +x kind-linux-amd64
     mv kind-linux-amd64 kind
     export PATH=$PATH:$PWD

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

@@ -61,25 +61,14 @@ var (
 	instID  = &cachedValue{k: "instance/id", trim: true}
 )
 
-var (
+var defaultClient = &Client{hc: &http.Client{
-	defaultClient = &Client{hc: &http.Client{
+	Transport: &http.Transport{
-		Transport: &http.Transport{
+		Dial: (&net.Dialer{
-			Dial: (&net.Dialer{
+			Timeout:   2 * time.Second,
-				Timeout:   2 * time.Second,
+			KeepAlive: 30 * time.Second,
-				KeepAlive: 30 * time.Second,
+		}).Dial,
-			}).Dial,
+	},
-			ResponseHeaderTimeout: 2 * time.Second,
+}}
-		},
-	}}
-	subscribeClient = &Client{hc: &http.Client{
-		Transport: &http.Transport{
-			Dial: (&net.Dialer{
-				Timeout:   2 * time.Second,
-				KeepAlive: 30 * time.Second,
-			}).Dial,
-		},
-	}}
-)
 
 // NotDefinedError is returned when requested metadata is not defined.
 //
@@ -206,10 +195,9 @@ func systemInfoSuggestsGCE() bool {
 	return name == "Google" || name == "Google Compute Engine"
 }
 
-// Subscribe calls Client.Subscribe on a client designed for subscribing (one with no
+// Subscribe calls Client.Subscribe on the default client.
-// ResponseHeaderTimeout).
 func Subscribe(suffix string, fn func(v string, ok bool) error) error {
-	return subscribeClient.Subscribe(suffix, fn)
+	return defaultClient.Subscribe(suffix, fn)
 }
 
 // Get calls Client.Get on the default client.
@@ -227,6 +215,9 @@ func InternalIP() (string, error) { return defaultClient.InternalIP() }
 // ExternalIP returns the instance's primary external (public) IP address.
 func ExternalIP() (string, error) { return defaultClient.ExternalIP() }
 
+// Email calls Client.Email on the default client.
+func Email(serviceAccount string) (string, error) { return defaultClient.Email(serviceAccount) }
+
 // Hostname returns the instance's hostname. This will be of the form
 // "<instanceID>.c.<projID>.internal".
 func Hostname() (string, error) { return defaultClient.Hostname() }
@@ -277,9 +268,14 @@ type Client struct {
 	hc *http.Client
 }
 
-// NewClient returns a Client that can be used to fetch metadata. All HTTP requests
+// NewClient returns a Client that can be used to fetch metadata.
-// will use the given http.Client instead of the default client.
+// Returns the client that uses the specified http.Client for HTTP requests.
+// If nil is specified, returns the default client.
 func NewClient(c *http.Client) *Client {
+	if c == nil {
+		return defaultClient
+	}
+
 	return &Client{hc: c}
 }
 
@@ -301,7 +297,10 @@ func (c *Client) getETag(suffix string) (value, etag string, err error) {
 		host = metadataIP
 	}
 	u := "http://" + host + "/computeMetadata/v1/" + suffix
-	req, _ := http.NewRequest("GET", u, nil)
+	req, err := http.NewRequest("GET", u, nil)
+	if err != nil {
+		return "", "", err
+	}
 	req.Header.Set("Metadata-Flavor", "Google")
 	req.Header.Set("User-Agent", userAgent)
 	res, err := c.hc.Do(req)
@@ -367,6 +366,16 @@ func (c *Client) InternalIP() (string, error) {
 	return c.getTrimmed("instance/network-interfaces/0/ip")
 }
 
+// Email returns the email address associated with the service account.
+// The account may be empty or the string "default" to use the instance's
+// main account.
+func (c *Client) Email(serviceAccount string) (string, error) {
+	if serviceAccount == "" {
+		serviceAccount = "default"
+	}
+	return c.getTrimmed("instance/service-accounts/" + serviceAccount + "/email")
+}
+
 // ExternalIP returns the instance's primary external (public) IP address.
 func (c *Client) ExternalIP() (string, error) {
 	return c.getTrimmed("instance/network-interfaces/0/access-configs/0/external-ip")
@@ -394,11 +403,7 @@ func (c *Client) InstanceTags() ([]string, error) {
 
 // InstanceName returns the current VM's instance ID string.
 func (c *Client) InstanceName() (string, error) {
-	host, err := c.Hostname()
+	return c.getTrimmed("instance/name")
-	if err != nil {
-		return "", err
-	}
-	return strings.Split(host, ".")[0], nil
 }
 
 // Zone returns the current VM's zone, such as "us-central1-b".

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

@@ -0,0 +1,32 @@
+# The standard Go .gitignore file follows. (Sourced from: github.com/github/gitignore/master/Go.gitignore)
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+.DS_Store
+.idea/
+.vscode/
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+
+# go-autorest specific
+vendor/
+autorest/azure/example/example

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

@@ -0,0 +1,23 @@
+DIR?=./autorest/
+
+default: build
+
+build: fmt
+	go install $(DIR)
+
+test:
+	go test $(DIR) || exit 1
+
+vet:
+	@echo "go vet ."
+	@go vet $(DIR)... ; if [ $$? -eq 1 ]; then \
+		echo ""; \
+		echo "Vet found suspicious constructs. Please check the reported constructs"; \
+		echo "and fix them if necessary before submitting the code for review."; \
+		exit 1; \
+	fi
+
+fmt:
+	gofmt -w $(DIR)
+
+.PHONY: build test vet fmt

vendor/github.com/Azure/go-autorest/Gopkg.lock

@@ -0,0 +1,324 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  digest = "1:892e39e5c083d0943f1e80ab8351690f183c6a5ab24e1d280adcad424c26255e"
+  name = "contrib.go.opencensus.io/exporter/ocagent"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "a8a6f458bbc1d5042322ad1f9b65eeb0b69be9ea"
+  version = "v0.6.0"
+
+[[projects]]
+  digest = "1:8f5acd4d4462b5136af644d25101f0968a7a94ee90fcb2059cec5b7cc42e0b20"
+  name = "github.com/census-instrumentation/opencensus-proto"
+  packages = [
+    "gen-go/agent/common/v1",
+    "gen-go/agent/metrics/v1",
+    "gen-go/agent/trace/v1",
+    "gen-go/metrics/v1",
+    "gen-go/resource/v1",
+    "gen-go/trace/v1",
+  ]
+  pruneopts = "UT"
+  revision = "d89fa54de508111353cb0b06403c00569be780d8"
+  version = "v0.2.1"
+
+[[projects]]
+  digest = "1:ffe9824d294da03b391f44e1ae8281281b4afc1bdaa9588c9097785e3af10cec"
+  name = "github.com/davecgh/go-spew"
+  packages = ["spew"]
+  pruneopts = "UT"
+  revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73"
+  version = "v1.1.1"
+
+[[projects]]
+  digest = "1:76dc72490af7174349349838f2fe118996381b31ea83243812a97e5a0fd5ed55"
+  name = "github.com/dgrijalva/jwt-go"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "06ea1031745cb8b3dab3f6a236daf2b0aa468b7e"
+  version = "v3.2.0"
+
+[[projects]]
+  digest = "1:cf0d2e435fd4ce45b789e93ef24b5f08e86be0e9807a16beb3694e2d8c9af965"
+  name = "github.com/dimchansky/utfbom"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "d2133a1ce379ef6fa992b0514a77146c60db9d1c"
+  version = "v1.1.0"
+
+[[projects]]
+  branch = "master"
+  digest = "1:b7cb6054d3dff43b38ad2e92492f220f57ae6087ee797dca298139776749ace8"
+  name = "github.com/golang/groupcache"
+  packages = ["lru"]
+  pruneopts = "UT"
+  revision = "611e8accdfc92c4187d399e95ce826046d4c8d73"
+
+[[projects]]
+  digest = "1:e3839df32927e8d3403cd5aa7253d966e8ff80fc8f10e2e35d146461cd83fcfa"
+  name = "github.com/golang/protobuf"
+  packages = [
+    "descriptor",
+    "jsonpb",
+    "proto",
+    "protoc-gen-go/descriptor",
+    "ptypes",
+    "ptypes/any",
+    "ptypes/duration",
+    "ptypes/struct",
+    "ptypes/timestamp",
+    "ptypes/wrappers",
+  ]
+  pruneopts = "UT"
+  revision = "6c65a5562fc06764971b7c5d05c76c75e84bdbf7"
+  version = "v1.3.2"
+
+[[projects]]
+  digest = "1:c560cd79300fac84f124b96225181a637a70b60155919a3c36db50b7cca6b806"
+  name = "github.com/grpc-ecosystem/grpc-gateway"
+  packages = [
+    "internal",
+    "runtime",
+    "utilities",
+  ]
+  pruneopts = "UT"
+  revision = "f7120437bb4f6c71f7f5076ad65a45310de2c009"
+  version = "v1.12.1"
+
+[[projects]]
+  digest = "1:5d231480e1c64a726869bc4142d270184c419749d34f167646baa21008eb0a79"
+  name = "github.com/mitchellh/go-homedir"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "af06845cf3004701891bf4fdb884bfe4920b3727"
+  version = "v1.1.0"
+
+[[projects]]
+  digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe"
+  name = "github.com/pmezard/go-difflib"
+  packages = ["difflib"]
+  pruneopts = "UT"
+  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
+  version = "v1.0.0"
+
+[[projects]]
+  digest = "1:99d32780e5238c2621fff621123997c3e3cca96db8be13179013aea77dfab551"
+  name = "github.com/stretchr/testify"
+  packages = [
+    "assert",
+    "require",
+  ]
+  pruneopts = "UT"
+  revision = "221dbe5ed46703ee255b1da0dec05086f5035f62"
+  version = "v1.4.0"
+
+[[projects]]
+  digest = "1:7c5e00383399fe13de0b4b65c9fdde16275407ce8ac02d867eafeaa916edcc71"
+  name = "go.opencensus.io"
+  packages = [
+    ".",
+    "internal",
+    "internal/tagencoding",
+    "metric/metricdata",
+    "metric/metricproducer",
+    "plugin/ocgrpc",
+    "plugin/ochttp",
+    "plugin/ochttp/propagation/b3",
+    "plugin/ochttp/propagation/tracecontext",
+    "resource",
+    "stats",
+    "stats/internal",
+    "stats/view",
+    "tag",
+    "trace",
+    "trace/internal",
+    "trace/propagation",
+    "trace/tracestate",
+  ]
+  pruneopts = "UT"
+  revision = "aad2c527c5defcf89b5afab7f37274304195a6b2"
+  version = "v0.22.2"
+
+[[projects]]
+  branch = "master"
+  digest = "1:f604f5e2ee721b6757d962dfe7bab4f28aae50c456e39cfb2f3819762a44a6ae"
+  name = "golang.org/x/crypto"
+  packages = [
+    "pkcs12",
+    "pkcs12/internal/rc2",
+  ]
+  pruneopts = "UT"
+  revision = "e9b2fee46413994441b28dfca259d911d963dfed"
+
+[[projects]]
+  branch = "master"
+  digest = "1:334b27eac455cb6567ea28cd424230b07b1a64334a2f861a8075ac26ce10af43"
+  name = "golang.org/x/lint"
+  packages = [
+    ".",
+    "golint",
+  ]
+  pruneopts = "UT"
+  revision = "fdd1cda4f05fd1fd86124f0ef9ce31a0b72c8448"
+
+[[projects]]
+  branch = "master"
+  digest = "1:257a75d024975428ab9192bfc334c3490882f8cb21322ea5784ca8eca000a910"
+  name = "golang.org/x/net"
+  packages = [
+    "http/httpguts",
+    "http2",
+    "http2/hpack",
+    "idna",
+    "internal/timeseries",
+    "trace",
+  ]
+  pruneopts = "UT"
+  revision = "1ddd1de85cb0337b623b740a609d35817d516a8d"
+
+[[projects]]
+  branch = "master"
+  digest = "1:382bb5a7fb4034db3b6a2d19e5a4a6bcf52f4750530603c01ca18a172fa3089b"
+  name = "golang.org/x/sync"
+  packages = ["semaphore"]
+  pruneopts = "UT"
+  revision = "cd5d95a43a6e21273425c7ae415d3df9ea832eeb"
+
+[[projects]]
+  branch = "master"
+  digest = "1:4da420ceda5f68e8d748aa2169d0ed44ffadb1bbd6537cf778a49563104189b8"
+  name = "golang.org/x/sys"
+  packages = ["unix"]
+  pruneopts = "UT"
+  revision = "ce4227a45e2eb77e5c847278dcc6a626742e2945"
+
+[[projects]]
+  digest = "1:8d8faad6b12a3a4c819a3f9618cb6ee1fa1cfc33253abeeea8b55336721e3405"
+  name = "golang.org/x/text"
+  packages = [
+    "collate",
+    "collate/build",
+    "internal/colltab",
+    "internal/gen",
+    "internal/language",
+    "internal/language/compact",
+    "internal/tag",
+    "internal/triegen",
+    "internal/ucd",
+    "language",
+    "secure/bidirule",
+    "transform",
+    "unicode/bidi",
+    "unicode/cldr",
+    "unicode/norm",
+    "unicode/rangetable",
+  ]
+  pruneopts = "UT"
+  revision = "342b2e1fbaa52c93f31447ad2c6abc048c63e475"
+  version = "v0.3.2"
+
+[[projects]]
+  branch = "master"
+  digest = "1:4eb5ea8395fb60212dd58b92c9db80bab59d5e99c7435f9a6a0a528c373b60e7"
+  name = "golang.org/x/tools"
+  packages = [
+    "go/ast/astutil",
+    "go/gcexportdata",
+    "go/internal/gcimporter",
+    "go/types/typeutil",
+  ]
+  pruneopts = "UT"
+  revision = "259af5ff87bdcd4abf2ecda8edc3f13f04f26a42"
+
+[[projects]]
+  digest = "1:964bb30febc27fabfbec4759fa530c6ec35e77a7c85fed90b9317ea39a054877"
+  name = "google.golang.org/api"
+  packages = ["support/bundler"]
+  pruneopts = "UT"
+  revision = "8a410c21381766a810817fd6200fce8838ecb277"
+  version = "v0.14.0"
+
+[[projects]]
+  branch = "master"
+  digest = "1:a8d5c2c6e746b3485e36908ab2a9e3d77b86b81f8156d88403c7d2b462431dfd"
+  name = "google.golang.org/genproto"
+  packages = [
+    "googleapis/api/httpbody",
+    "googleapis/rpc/status",
+    "protobuf/field_mask",
+  ]
+  pruneopts = "UT"
+  revision = "51378566eb590fa106d1025ea12835a4416dda84"
+
+[[projects]]
+  digest = "1:b59ce3ddb11daeeccccc9cb3183b58ebf8e9a779f1c853308cd91612e817a301"
+  name = "google.golang.org/grpc"
+  packages = [
+    ".",
+    "backoff",
+    "balancer",
+    "balancer/base",
+    "balancer/roundrobin",
+    "binarylog/grpc_binarylog_v1",
+    "codes",
+    "connectivity",
+    "credentials",
+    "credentials/internal",
+    "encoding",
+    "encoding/proto",
+    "grpclog",
+    "internal",
+    "internal/backoff",
+    "internal/balancerload",
+    "internal/binarylog",
+    "internal/buffer",
+    "internal/channelz",
+    "internal/envconfig",
+    "internal/grpcrand",
+    "internal/grpcsync",
+    "internal/resolver/dns",
+    "internal/resolver/passthrough",
+    "internal/syscall",
+    "internal/transport",
+    "keepalive",
+    "metadata",
+    "naming",
+    "peer",
+    "resolver",
+    "serviceconfig",
+    "stats",
+    "status",
+    "tap",
+  ]
+  pruneopts = "UT"
+  revision = "1a3960e4bd028ac0cec0a2afd27d7d8e67c11514"
+  version = "v1.25.1"
+
+[[projects]]
+  digest = "1:b75b3deb2bce8bc079e16bb2aecfe01eb80098f5650f9e93e5643ca8b7b73737"
+  name = "gopkg.in/yaml.v2"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "1f64d6156d11335c3f22d9330b0ad14fc1e789ce"
+  version = "v2.2.7"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  input-imports = [
+    "contrib.go.opencensus.io/exporter/ocagent",
+    "github.com/dgrijalva/jwt-go",
+    "github.com/dimchansky/utfbom",
+    "github.com/mitchellh/go-homedir",
+    "github.com/stretchr/testify/require",
+    "go.opencensus.io/plugin/ochttp",
+    "go.opencensus.io/plugin/ochttp/propagation/tracecontext",
+    "go.opencensus.io/stats/view",
+    "go.opencensus.io/trace",
+    "golang.org/x/crypto/pkcs12",
+    "golang.org/x/lint/golint",
+  ]
+  solver-name = "gps-cdcl"
+  solver-version = 1

vendor/github.com/Azure/go-autorest/Gopkg.toml

@@ -0,0 +1,59 @@
+# Gopkg.toml example
+#
+# Refer to https://golang.github.io/dep/docs/Gopkg.toml.html
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#   name = "github.com/x/y"
+#   version = "2.4.0"
+#
+# [prune]
+#   non-go = false
+#   go-tests = true
+#   unused-packages = true
+
+required = ["golang.org/x/lint/golint"]
+
+[prune]
+  go-tests = true
+  unused-packages = true
+
+[[constraint]]
+  name = "contrib.go.opencensus.io/exporter/ocagent"
+  version = "0.6.0"
+
+[[constraint]]
+  name = "github.com/dgrijalva/jwt-go"
+  version = "3.2.0"
+
+[[constraint]]
+  name = "github.com/dimchansky/utfbom"
+  version = "1.1.0"
+
+[[constraint]]
+  name = "github.com/mitchellh/go-homedir"
+  version = "1.1.0"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.3.0"
+
+[[constraint]]
+  name = "go.opencensus.io"
+  version = "0.22.0"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/crypto"

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

@@ -1,19 +1,5 @@
-Copyright 2012-2013 Rackspace, Inc.
 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+                                 Apache License
-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.                                
-
-------
- 
-				Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
 
@@ -189,3 +175,17 @@ specific language governing permissions and limitations under the License.
       of your accepting any such warranty or additional liability.
 
    END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Microsoft Corporation
+
+   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.

vendor/github.com/Azure/go-autorest/README.md

@@ -0,0 +1,165 @@
+# go-autorest
+
+[![GoDoc](https://godoc.org/github.com/Azure/go-autorest/autorest?status.png)](https://godoc.org/github.com/Azure/go-autorest/autorest)
+[![Build Status](https://dev.azure.com/azure-sdk/public/_apis/build/status/go/Azure.go-autorest?branchName=master)](https://dev.azure.com/azure-sdk/public/_build/latest?definitionId=625&branchName=master)
+[![Go Report Card](https://goreportcard.com/badge/Azure/go-autorest)](https://goreportcard.com/report/Azure/go-autorest)
+
+Package go-autorest provides an HTTP request client for use with [Autorest](https://github.com/Azure/autorest.go)-generated API client packages.
+
+An authentication client tested with Azure Active Directory (AAD) is also
+provided in this repo in the package
+`github.com/Azure/go-autorest/autorest/adal`.  Despite its name, this package
+is maintained only as part of the Azure Go SDK and is not related to other
+"ADAL" libraries in [github.com/AzureAD](https://github.com/AzureAD).
+
+## Overview
+
+Package go-autorest implements an HTTP request pipeline suitable for use across
+multiple goroutines and provides the shared routines used by packages generated
+by [Autorest](https://github.com/Azure/autorest.go).
+
+The package breaks sending and responding to HTTP requests into three phases: Preparing, Sending,
+and Responding. A typical pattern is:
+
+```go
+  req, err := Prepare(&http.Request{},
+    token.WithAuthorization())
+
+  resp, err := Send(req,
+    WithLogging(logger),
+    DoErrorIfStatusCode(http.StatusInternalServerError),
+    DoCloseIfError(),
+    DoRetryForAttempts(5, time.Second))
+
+  err = Respond(resp,
+		ByDiscardingBody(),
+    ByClosing())
+```
+
+Each phase relies on decorators to modify and / or manage processing. Decorators may first modify
+and then pass the data along, pass the data first and then modify the result, or wrap themselves
+around passing the data (such as a logger might do). Decorators run in the order provided. For
+example, the following:
+
+```go
+  req, err := Prepare(&http.Request{},
+    WithBaseURL("https://microsoft.com/"),
+    WithPath("a"),
+    WithPath("b"),
+    WithPath("c"))
+```
+
+will set the URL to:
+
+```
+  https://microsoft.com/a/b/c
+```
+
+Preparers and Responders may be shared and re-used (assuming the underlying decorators support
+sharing and re-use). Performant use is obtained by creating one or more Preparers and Responders
+shared among multiple go-routines, and a single Sender shared among multiple sending go-routines,
+all bound together by means of input / output channels.
+
+Decorators hold their passed state within a closure (such as the path components in the example
+above). Be careful to share Preparers and Responders only in a context where such held state
+applies. For example, it may not make sense to share a Preparer that applies a query string from a
+fixed set of values. Similarly, sharing a Responder that reads the response body into a passed
+struct (e.g., `ByUnmarshallingJson`) is likely incorrect.
+
+Errors raised by autorest objects and methods will conform to the `autorest.Error` interface.
+
+See the included examples for more detail. For details on the suggested use of this package by
+generated clients, see the Client described below.
+
+## Helpers
+
+### Handling Swagger Dates
+
+The Swagger specification (https://swagger.io) that drives AutoRest
+(https://github.com/Azure/autorest/) precisely defines two date forms: date and date-time. The
+github.com/Azure/go-autorest/autorest/date package provides time.Time derivations to ensure correct
+parsing and formatting.
+
+### Handling Empty Values
+
+In JSON, missing values have different semantics than empty values. This is especially true for
+services using the HTTP PATCH verb. The JSON submitted with a PATCH request generally contains
+only those values to modify. Missing values are to be left unchanged. Developers, then, require a
+means to both specify an empty value and to leave the value out of the submitted JSON.
+
+The Go JSON package (`encoding/json`) supports the `omitempty` tag. When specified, it omits
+empty values from the rendered JSON. Since Go defines default values for all base types (such as ""
+for string and 0 for int) and provides no means to mark a value as actually empty, the JSON package
+treats default values as meaning empty, omitting them from the rendered JSON. This means that, using
+the Go base types encoded through the default JSON package, it is not possible to create JSON to
+clear a value at the server.
+
+The workaround within the Go community is to use pointers to base types in lieu of base types within
+structures that map to JSON. For example, instead of a value of type `string`, the workaround uses
+`*string`. While this enables distinguishing empty values from those to be unchanged, creating
+pointers to a base type (notably constant, in-line values) requires additional variables. This, for
+example,
+
+```go
+  s := struct {
+    S *string
+  }{ S: &"foo" }
+```
+fails, while, this
+
+```go
+  v := "foo"
+  s := struct {
+    S *string
+  }{ S: &v }
+```
+succeeds.
+
+To ease using pointers, the subpackage `to` contains helpers that convert to and from pointers for
+Go base types which have Swagger analogs. It also provides a helper that converts between
+`map[string]string` and `map[string]*string`, enabling the JSON to specify that the value
+associated with a key should be cleared. With the helpers, the previous example becomes
+
+```go
+  s := struct {
+    S *string
+  }{ S: to.StringPtr("foo") }
+```
+
+## Install
+
+```bash
+go get github.com/Azure/go-autorest/autorest
+go get github.com/Azure/go-autorest/autorest/azure
+go get github.com/Azure/go-autorest/autorest/date
+go get github.com/Azure/go-autorest/autorest/to
+```
+
+### Using with Go Modules
+In [v12.0.1](https://github.com/Azure/go-autorest/pull/386), this repository introduced the following modules.
+
+- autorest/adal
+- autorest/azure/auth
+- autorest/azure/cli
+- autorest/date
+- autorest/mocks
+- autorest/to
+- autorest/validation
+- autorest
+- logger
+- tracing
+
+Tagging cumulative SDK releases as a whole (e.g. `v12.3.0`) is still enabled to support consumers of this repo that have not yet migrated to modules.
+
+## License
+
+See LICENSE file.
+
+-----
+
+This project has adopted the [Microsoft Open Source Code of
+Conduct](https://opensource.microsoft.com/codeofconduct/). For more information
+see the [Code of Conduct
+FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact
+[opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional
+questions or comments.

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

@@ -24,6 +24,7 @@ package adal
 */
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -101,7 +102,14 @@ type deviceToken struct {
 
 // InitiateDeviceAuth initiates a device auth flow. It returns a DeviceCode
 // that can be used with CheckForUserCompletion or WaitForUserCompletion.
+// Deprecated: use InitiateDeviceAuthWithContext() instead.
 func InitiateDeviceAuth(sender Sender, oauthConfig OAuthConfig, clientID, resource string) (*DeviceCode, error) {
+	return InitiateDeviceAuthWithContext(context.Background(), sender, oauthConfig, clientID, resource)
+}
+
+// InitiateDeviceAuthWithContext initiates a device auth flow. It returns a DeviceCode
+// that can be used with CheckForUserCompletion or WaitForUserCompletion.
+func InitiateDeviceAuthWithContext(ctx context.Context, sender Sender, oauthConfig OAuthConfig, clientID, resource string) (*DeviceCode, error) {
 	v := url.Values{
 		"client_id": []string{clientID},
 		"resource":  []string{resource},
@@ -117,7 +125,7 @@ func InitiateDeviceAuth(sender Sender, oauthConfig OAuthConfig, clientID, resour
 
 	req.ContentLength = int64(len(s))
 	req.Header.Set(contentType, mimeTypeFormPost)
-	resp, err := sender.Do(req)
+	resp, err := sender.Do(req.WithContext(ctx))
 	if err != nil {
 		return nil, fmt.Errorf("%s %s: %s", logPrefix, errCodeSendingFails, err.Error())
 	}
@@ -151,7 +159,14 @@ func InitiateDeviceAuth(sender Sender, oauthConfig OAuthConfig, clientID, resour
 
 // CheckForUserCompletion takes a DeviceCode and checks with the Azure AD OAuth endpoint
 // to see if the device flow has: been completed, timed out, or otherwise failed
+// Deprecated: use CheckForUserCompletionWithContext() instead.
 func CheckForUserCompletion(sender Sender, code *DeviceCode) (*Token, error) {
+	return CheckForUserCompletionWithContext(context.Background(), sender, code)
+}
+
+// CheckForUserCompletionWithContext takes a DeviceCode and checks with the Azure AD OAuth endpoint
+// to see if the device flow has: been completed, timed out, or otherwise failed
+func CheckForUserCompletionWithContext(ctx context.Context, sender Sender, code *DeviceCode) (*Token, error) {
 	v := url.Values{
 		"client_id":  []string{code.ClientID},
 		"code":       []string{*code.DeviceCode},
@@ -169,7 +184,7 @@ func CheckForUserCompletion(sender Sender, code *DeviceCode) (*Token, error) {
 
 	req.ContentLength = int64(len(s))
 	req.Header.Set(contentType, mimeTypeFormPost)
-	resp, err := sender.Do(req)
+	resp, err := sender.Do(req.WithContext(ctx))
 	if err != nil {
 		return nil, fmt.Errorf("%s %s: %s", logPrefix, errTokenSendingFails, err.Error())
 	}
@@ -207,18 +222,29 @@ func CheckForUserCompletion(sender Sender, code *DeviceCode) (*Token, error) {
 	case "code_expired":
 		return nil, ErrDeviceCodeExpired
 	default:
+		// return a more meaningful error message if available
+		if token.ErrorDescription != nil {
+			return nil, fmt.Errorf("%s %s: %s", logPrefix, *token.Error, *token.ErrorDescription)
+		}
 		return nil, ErrDeviceGeneric
 	}
 }
 
 // WaitForUserCompletion calls CheckForUserCompletion repeatedly until a token is granted or an error state occurs.
 // This prevents the user from looping and checking against 'ErrDeviceAuthorizationPending'.
+// Deprecated: use WaitForUserCompletionWithContext() instead.
 func WaitForUserCompletion(sender Sender, code *DeviceCode) (*Token, error) {
+	return WaitForUserCompletionWithContext(context.Background(), sender, code)
+}
+
+// WaitForUserCompletionWithContext calls CheckForUserCompletion repeatedly until a token is granted or an error
+// state occurs.  This prevents the user from looping and checking against 'ErrDeviceAuthorizationPending'.
+func WaitForUserCompletionWithContext(ctx context.Context, sender Sender, code *DeviceCode) (*Token, error) {
 	intervalDuration := time.Duration(*code.Interval) * time.Second
 	waitDuration := intervalDuration
 
 	for {
-		token, err := CheckForUserCompletion(sender, code)
+		token, err := CheckForUserCompletionWithContext(ctx, sender, code)
 
 		if err == nil {
 			return token, nil
@@ -237,6 +263,11 @@ func WaitForUserCompletion(sender Sender, code *DeviceCode) (*Token, error) {
 			return nil, fmt.Errorf("%s Error waiting for user to complete device flow. Server told us to slow_down too much", logPrefix)
 		}
 
-		time.Sleep(waitDuration)
+		select {
+		case <-time.After(waitDuration):
+			// noop
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		}
 	}
 }

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

@@ -3,9 +3,10 @@ module github.com/Azure/go-autorest/autorest/adal
 go 1.12
 
 require (
-	github.com/Azure/go-autorest/autorest/date v0.1.0
+	github.com/Azure/go-autorest v14.2.0+incompatible
-	github.com/Azure/go-autorest/autorest/mocks v0.1.0
+	github.com/Azure/go-autorest/autorest/date v0.3.0
-	github.com/Azure/go-autorest/tracing v0.5.0
+	github.com/Azure/go-autorest/autorest/mocks v0.4.1
-	github.com/dgrijalva/jwt-go v3.2.0+incompatible
+	github.com/Azure/go-autorest/tracing v0.6.0
-	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2
+	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

@@ -1,12 +1,19 @@
-github.com/Azure/go-autorest/autorest/date v0.1.0 h1:YGrhWfrgtFs84+h0o46rJrlmsZtyZRg470CqAXTZaGM=
+github.com/Azure/go-autorest v14.2.0+incompatible h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=
-github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
+github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
-github.com/Azure/go-autorest/autorest/mocks v0.1.0 h1:Kx+AUU2Te+A3JIyYn6Dfs+cFgx5XorQKuIXrZGoq/SI=
+github.com/Azure/go-autorest/autorest/date v0.3.0 h1:7gUk1U5M/CQbp9WoqinNzJar+8KY+LPI6wiWrP/myHw=
-github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
+github.com/Azure/go-autorest/autorest/date v0.3.0/go.mod h1:BI0uouVdmngYNUzGWeSYnokU+TrmwEsOqdt8Y6sso74=
-github.com/Azure/go-autorest/tracing v0.5.0 h1:TRn4WjSnkcSy5AEG3pnbtFSwNtwzjr4VYyQflFE619k=
+github.com/Azure/go-autorest/autorest/mocks v0.4.1 h1:K0laFcLE6VLTOwNgSxaGbUcLPuGXlNkbVvq4cW4nIHk=
-github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
+github.com/Azure/go-autorest/autorest/mocks v0.4.1/go.mod h1:LTp+uSrOhSkaKrUy935gNZuuIPPVsHlr9DSOxSayd+k=
-github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
+github.com/Azure/go-autorest/tracing v0.6.0 h1:TYi4+3m5t6K48TGI9AUdb+IzbnSxvnvUMfuitfgcfuo=
-github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+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/go_mod_tidy_hack.go

@@ -0,0 +1,24 @@
+// +build modhack
+
+package adal
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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.
+
+// This file, and the github.com/Azure/go-autorest import, won't actually become part of
+// the resultant binary.
+
+// Necessary for safely adding multi-module repo.
+// See: https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository
+import _ "github.com/Azure/go-autorest"

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

@@ -15,11 +15,24 @@ package adal
 //  limitations under the License.
 
 import (
+	"crypto/rsa"
+	"crypto/x509"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
+
+	"golang.org/x/crypto/pkcs12"
+)
+
+var (
+	// ErrMissingCertificate is returned when no local certificate is found in the provided PFX data.
+	ErrMissingCertificate = errors.New("adal: certificate missing")
+
+	// ErrMissingPrivateKey is returned when no private key is found in the provided PFX data.
+	ErrMissingPrivateKey = errors.New("adal: private key missing")
 )
 
 // LoadToken restores a Token object from a file located at 'path'.
@@ -71,3 +84,52 @@ func SaveToken(path string, mode os.FileMode, token Token) error {
 	}
 	return nil
 }
+
+// DecodePfxCertificateData extracts the x509 certificate and RSA private key from the provided PFX data.
+// The PFX data must contain a private key along with a certificate whose public key matches that of the
+// private key or an error is returned.
+// If the private key is not password protected pass the empty string for password.
+func DecodePfxCertificateData(pfxData []byte, password string) (*x509.Certificate, *rsa.PrivateKey, error) {
+	blocks, err := pkcs12.ToPEM(pfxData, password)
+	if err != nil {
+		return nil, nil, err
+	}
+	// first extract the private key
+	var priv *rsa.PrivateKey
+	for _, block := range blocks {
+		if block.Type == "PRIVATE KEY" {
+			priv, err = x509.ParsePKCS1PrivateKey(block.Bytes)
+			if err != nil {
+				return nil, nil, err
+			}
+			break
+		}
+	}
+	if priv == nil {
+		return nil, nil, ErrMissingPrivateKey
+	}
+	// now find the certificate with the matching public key of our private key
+	var cert *x509.Certificate
+	for _, block := range blocks {
+		if block.Type == "CERTIFICATE" {
+			pcert, err := x509.ParseCertificate(block.Bytes)
+			if err != nil {
+				return nil, nil, err
+			}
+			certKey, ok := pcert.PublicKey.(*rsa.PublicKey)
+			if !ok {
+				// keep looking
+				continue
+			}
+			if priv.E == certKey.E && priv.N.Cmp(certKey.N) == 0 {
+				// found a match
+				cert = pcert
+				break
+			}
+		}
+	}
+	if cert == nil {
+		return nil, nil, ErrMissingCertificate
+	}
+	return cert, priv, nil
+}

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

@@ -24,17 +24,18 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"math"
-	"net"
 	"net/http"
 	"net/url"
+	"os"
 	"strings"
 	"sync"
 	"time"
 
 	"github.com/Azure/go-autorest/autorest/date"
-	"github.com/dgrijalva/jwt-go"
+	"github.com/form3tech-oss/jwt-go"
 )
 
 const (
@@ -61,8 +62,20 @@ const (
 	// msiEndpoint is the well known endpoint for getting MSI authentications tokens
 	msiEndpoint = "http://169.254.169.254/metadata/identity/oauth2/token"
 
+	// the API version to use for the MSI endpoint
+	msiAPIVersion = "2018-02-01"
+
 	// the default number of attempts to refresh an MSI authentication token
 	defaultMaxMSIRefreshAttempts = 5
+
+	// asMSIEndpointEnv is the environment variable used to store the endpoint on App Service and Functions
+	asMSIEndpointEnv = "MSI_ENDPOINT"
+
+	// asMSISecretEnv is the environment variable used to store the request secret on App Service and Functions
+	asMSISecretEnv = "MSI_SECRET"
+
+	// the API version to use for the App Service MSI endpoint
+	appServiceAPIVersion = "2017-09-01"
 )
 
 // OAuthTokenProvider is an interface which should be implemented by an access token retriever
@@ -100,6 +113,9 @@ type RefresherWithContext interface {
 // a successful token refresh
 type TokenRefreshCallback func(Token) error
 
+// TokenRefresh is a type representing a custom callback to refresh a token
+type TokenRefresh func(ctx context.Context, resource string) (*Token, error)
+
 // Token encapsulates the access token used to authorize Azure requests.
 // https://docs.microsoft.com/en-us/azure/active-directory/develop/v1-oauth2-client-creds-grant-flow#service-to-service-access-token-response
 type Token struct {
@@ -239,7 +255,7 @@ func (secret *ServicePrincipalCertificateSecret) SignJwt(spt *ServicePrincipalTo
 		"sub": spt.inner.ClientID,
 		"jti": base64.URLEncoding.EncodeToString(jti),
 		"nbf": time.Now().Unix(),
-		"exp": time.Now().Add(time.Hour * 24).Unix(),
+		"exp": time.Now().Add(24 * time.Hour).Unix(),
 	}
 
 	signedString, err := token.SignedString(secret.PrivateKey)
@@ -338,11 +354,13 @@ func (secret ServicePrincipalAuthorizationCodeSecret) MarshalJSON() ([]byte, err
 
 // ServicePrincipalToken encapsulates a Token created for a Service Principal.
 type ServicePrincipalToken struct {
-	inner            servicePrincipalToken
+	inner             servicePrincipalToken
-	refreshLock      *sync.RWMutex
+	refreshLock       *sync.RWMutex
-	sender           Sender
+	sender            Sender
-	refreshCallbacks []TokenRefreshCallback
+	customRefreshFunc TokenRefresh
+	refreshCallbacks  []TokenRefreshCallback
 	// MaxMSIRefreshAttempts is the maximum number of attempts to refresh an MSI token.
+	// Settings this to a value less than 1 will use the default value.
 	MaxMSIRefreshAttempts int
 }
 
@@ -356,6 +374,11 @@ func (spt *ServicePrincipalToken) SetRefreshCallbacks(callbacks []TokenRefreshCa
 	spt.refreshCallbacks = callbacks
 }
 
+// SetCustomRefreshFunc sets a custom refresh function used to refresh the token.
+func (spt *ServicePrincipalToken) SetCustomRefreshFunc(customRefreshFunc TokenRefresh) {
+	spt.customRefreshFunc = customRefreshFunc
+}
+
 // MarshalJSON implements the json.Marshaler interface.
 func (spt ServicePrincipalToken) MarshalJSON() ([]byte, error) {
 	return json.Marshal(spt.inner)
@@ -634,19 +657,52 @@ 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
+func GetMSIAppServiceEndpoint() (string, error) {
+	asMSIEndpoint, asMSIEndpointEnvExists := os.LookupEnv(asMSIEndpointEnv)
+
+	if asMSIEndpointEnvExists {
+		return asMSIEndpoint, nil
+	}
+	return "", errors.New("MSI endpoint not found")
+}
+
+// GetMSIEndpoint get the appropriate MSI endpoint depending on the runtime environment
+func GetMSIEndpoint() (string, error) {
+	if isAppService() {
+		return GetMSIAppServiceEndpoint()
+	}
+	return GetMSIVMEndpoint()
+}
+
 // NewServicePrincipalTokenFromMSI creates a ServicePrincipalToken via the MSI VM Extension.
 // It will use the system assigned identity when creating the token.
 func NewServicePrincipalTokenFromMSI(msiEndpoint, resource string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
-	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, nil, callbacks...)
+	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, nil, nil, callbacks...)
 }
 
 // NewServicePrincipalTokenFromMSIWithUserAssignedID creates a ServicePrincipalToken via the MSI VM Extension.
-// It will use the specified user assigned identity when creating the token.
+// It will use the clientID of specified user assigned identity when creating the token.
 func NewServicePrincipalTokenFromMSIWithUserAssignedID(msiEndpoint, resource string, userAssignedID string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
-	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, &userAssignedID, callbacks...)
+	return newServicePrincipalTokenFromMSI(msiEndpoint, resource, &userAssignedID, nil, callbacks...)
 }
 
-func newServicePrincipalTokenFromMSI(msiEndpoint, resource string, userAssignedID *string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
+// NewServicePrincipalTokenFromMSIWithIdentityResourceID creates a ServicePrincipalToken via the MSI VM Extension.
+// It will use the azure resource id of user assigned identity when creating the token.
+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 {
 		return nil, err
 	}
@@ -658,6 +714,11 @@ func newServicePrincipalTokenFromMSI(msiEndpoint, resource string, userAssignedI
 			return nil, err
 		}
 	}
+	if identityResourceID != nil {
+		if err := validateStringParam(*identityResourceID, "identityResourceID"); err != nil {
+			return nil, err
+		}
+	}
 	// We set the oauth config token endpoint to be MSI's endpoint
 	msiEndpointURL, err := url.Parse(msiEndpoint)
 	if err != nil {
@@ -666,10 +727,18 @@ func newServicePrincipalTokenFromMSI(msiEndpoint, resource string, userAssignedI
 
 	v := url.Values{}
 	v.Set("resource", resource)
-	v.Set("api-version", "2018-02-01")
+	// 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)
+	}
 	if userAssignedID != nil {
 		v.Set("client_id", *userAssignedID)
 	}
+	if identityResourceID != nil {
+		v.Set("mi_res_id", *identityResourceID)
+	}
 	msiEndpointURL.RawQuery = v.Encode()
 
 	spt := &ServicePrincipalToken{
@@ -725,8 +794,9 @@ func (spt *ServicePrincipalToken) EnsureFresh() error {
 // 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 (spt *ServicePrincipalToken) EnsureFreshWithContext(ctx context.Context) error {
-	if spt.inner.AutoRefresh && spt.inner.Token.WillExpireIn(spt.inner.RefreshWithin) {
+	// must take the read lock when initially checking the token's expiration
-		// take the write lock then check to see if the token was already refreshed
+	if spt.inner.AutoRefresh && spt.Token().WillExpireIn(spt.inner.RefreshWithin) {
+		// take the write lock then check again to see if the token was already refreshed
 		spt.refreshLock.Lock()
 		defer spt.refreshLock.Unlock()
 		if spt.inner.Token.WillExpireIn(spt.inner.RefreshWithin) {
@@ -750,13 +820,13 @@ func (spt *ServicePrincipalToken) InvokeRefreshCallbacks(token Token) error {
 }
 
 // Refresh obtains a fresh token for the Service Principal.
-// This method is not safe for concurrent use and should be syncrhonized.
+// This method is safe for concurrent use.
 func (spt *ServicePrincipalToken) Refresh() error {
 	return spt.RefreshWithContext(context.Background())
 }
 
 // RefreshWithContext obtains a fresh token for the Service Principal.
-// This method is not safe for concurrent use and should be syncrhonized.
+// This method is safe for concurrent use.
 func (spt *ServicePrincipalToken) RefreshWithContext(ctx context.Context) error {
 	spt.refreshLock.Lock()
 	defer spt.refreshLock.Unlock()
@@ -764,13 +834,13 @@ func (spt *ServicePrincipalToken) RefreshWithContext(ctx context.Context) error
 }
 
 // RefreshExchange refreshes the token, but for a different resource.
-// This method is not safe for concurrent use and should be syncrhonized.
+// This method is safe for concurrent use.
 func (spt *ServicePrincipalToken) RefreshExchange(resource string) error {
 	return spt.RefreshExchangeWithContext(context.Background(), resource)
 }
 
 // RefreshExchangeWithContext refreshes the token, but for a different resource.
-// This method is not safe for concurrent use and should be syncrhonized.
+// This method is safe for concurrent use.
 func (spt *ServicePrincipalToken) RefreshExchangeWithContext(ctx context.Context, resource string) error {
 	spt.refreshLock.Lock()
 	defer spt.refreshLock.Unlock()
@@ -789,19 +859,50 @@ func (spt *ServicePrincipalToken) getGrantType() string {
 }
 
 func isIMDS(u url.URL) bool {
-	imds, err := url.Parse(msiEndpoint)
+	return isMSIEndpoint(u) == true || isASEEndpoint(u) == true
+}
+
+func isMSIEndpoint(endpoint url.URL) bool {
+	msi, err := url.Parse(msiEndpoint)
 	if err != nil {
 		return false
 	}
-	return u.Host == imds.Host && u.Path == imds.Path
+	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)
+		if err != nil {
+			return err
+		}
+		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) {
 		v := url.Values{}
@@ -840,13 +941,22 @@ func (spt *ServicePrincipalToken) refreshInternal(ctx context.Context, resource
 	}
 
 	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 {
 		resp, err = spt.sender.Do(req)
 	}
 	if err != nil {
-		return newTokenRefreshError(fmt.Sprintf("adal: Failed to execute the refresh request. Error = '%v'", 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)
 	}
 
 	defer resp.Body.Close()
@@ -911,12 +1021,19 @@ func retryForIMDS(sender Sender, req *http.Request, maxAttempts int) (resp *http
 	attempt := 0
 	delay := time.Duration(0)
 
+	// maxAttempts is user-specified, ensure that its value is greater than zero else no request will be made
+	if maxAttempts < 1 {
+		maxAttempts = defaultMaxMSIRefreshAttempts
+	}
+
 	for attempt < maxAttempts {
+		if resp != nil && resp.Body != nil {
+			io.Copy(ioutil.Discard, resp.Body)
+			resp.Body.Close()
+		}
 		resp, err = sender.Do(req)
-		// retry on temporary network errors, e.g. transient network failures.
+		// we want to retry if err is not nil or the status code is in the list of retry codes
-		// if we don't receive a response then assume we can't connect to the
+		if err == nil && !responseHasStatusCode(resp, retries...) {
-		// endpoint so we're likely not running on an Azure VM so don't retry.
-		if (err != nil && !isTemporaryNetworkError(err)) || resp == nil || resp.StatusCode == http.StatusOK || !containsInt(retries, resp.StatusCode) {
 			return
 		}
 
@@ -940,20 +1057,12 @@ func retryForIMDS(sender Sender, req *http.Request, maxAttempts int) (resp *http
 	return
 }
 
-// returns true if the specified error is a temporary network error or false if it's not.
+func responseHasStatusCode(resp *http.Response, codes ...int) bool {
-// if the error doesn't implement the net.Error interface the return value is true.
+	if resp != nil {
-func isTemporaryNetworkError(err error) bool {
+		for _, i := range codes {
-	if netErr, ok := err.(net.Error); !ok || (ok && netErr.Temporary()) {
+			if i == resp.StatusCode {
-		return true
+				return true
-	}
+			}
-	return false
-}
-
-// returns true if slice ints contains the value n
-func containsInt(ints []int, n int) bool {
-	for _, i := range ints {
-		if i == n {
-			return true
 		}
 	}
 	return false
@@ -1078,3 +1187,12 @@ func NewMultiTenantServicePrincipalToken(multiTenantCfg MultiTenantOAuthConfig,
 	}
 	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)
+	if err == nil {
+		resp.Body.Close()
+	}
+	return err == nil
+}

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

@@ -0,0 +1,36 @@
+// +build go1.13
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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 adal
+
+import (
+	"context"
+	"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
+	req, _ := http.NewRequestWithContext(tempCtx, http.MethodGet, msiEndpoint, nil)
+	q := req.URL.Query()
+	q.Add("api-version", msiAPIVersion)
+	req.URL.RawQuery = q.Encode()
+	return sender.Do(req)
+}

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

@@ -0,0 +1,36 @@
+// +build !go1.13
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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 adal
+
+import (
+	"context"
+	"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()
+	req, _ := http.NewRequest(http.MethodGet, msiEndpoint, nil)
+	req = req.WithContext(tempCtx)
+	q := req.URL.Query()
+	q.Add("api-version", msiAPIVersion)
+	req.URL.RawQuery = q.Encode()
+	return sender.Do(req)
+}

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

@@ -138,6 +138,11 @@ func (ba *BearerAuthorizer) WithAuthorization() PrepareDecorator {
 	}
 }
 
+// TokenProvider returns OAuthTokenProvider so that it can be used for authorization outside the REST.
+func (ba *BearerAuthorizer) TokenProvider() adal.OAuthTokenProvider {
+	return ba.tokenProvider
+}
+
 // BearerAuthorizerCallbackFunc is the authentication callback signature.
 type BearerAuthorizerCallbackFunc func(tenantID, resource string) (*BearerAuthorizer, error)
 
@@ -171,20 +176,21 @@ func (bacb *BearerAuthorizerCallback) WithAuthorization() PrepareDecorator {
 				removeRequestBody(&rCopy)
 
 				resp, err := bacb.sender.Do(&rCopy)
-				if err == nil && resp.StatusCode == 401 {
+				if err != nil {
-					defer resp.Body.Close()
+					return r, err
-					if hasBearerChallenge(resp) {
+				}
-						bc, err := newBearerChallenge(resp)
+				DrainResponseBody(resp)
+				if resp.StatusCode == 401 && hasBearerChallenge(resp.Header) {
+					bc, err := newBearerChallenge(resp.Header)
+					if err != nil {
+						return r, err
+					}
+					if bacb.callback != nil {
+						ba, err := bacb.callback(bc.values[tenantID], bc.values["resource"])
 						if err != nil {
 							return r, err
 						}
-						if bacb.callback != nil {
+						return Prepare(r, ba.WithAuthorization())
-							ba, err := bacb.callback(bc.values[tenantID], bc.values["resource"])
-							if err != nil {
-								return r, err
-							}
-							return Prepare(r, ba.WithAuthorization())
-						}
 					}
 				}
 			}
@@ -194,8 +200,8 @@ func (bacb *BearerAuthorizerCallback) WithAuthorization() PrepareDecorator {
 }
 
 // returns true if the HTTP response contains a bearer challenge
-func hasBearerChallenge(resp *http.Response) bool {
+func hasBearerChallenge(header http.Header) bool {
-	authHeader := resp.Header.Get(bearerChallengeHeader)
+	authHeader := header.Get(bearerChallengeHeader)
 	if len(authHeader) == 0 || strings.Index(authHeader, bearer) < 0 {
 		return false
 	}
@@ -206,8 +212,8 @@ type bearerChallenge struct {
 	values map[string]string
 }
 
-func newBearerChallenge(resp *http.Response) (bc bearerChallenge, err error) {
+func newBearerChallenge(header http.Header) (bc bearerChallenge, err error) {
-	challenge := strings.TrimSpace(resp.Header.Get(bearerChallengeHeader))
+	challenge := strings.TrimSpace(header.Get(bearerChallengeHeader))
 	trimmedChallenge := challenge[len(bearer)+1:]
 
 	// challenge is a set of key=value pairs that are comma delimited
@@ -330,7 +336,7 @@ func (mt multiTenantSPTAuthorizer) WithAuthorization() PrepareDecorator {
 			for i := range auxTokens {
 				auxTokens[i] = fmt.Sprintf("Bearer %s", auxTokens[i])
 			}
-			return Prepare(r, WithHeader(headerAuxAuthorization, strings.Join(auxTokens, "; ")))
+			return Prepare(r, WithHeader(headerAuxAuthorization, strings.Join(auxTokens, ", ")))
 		})
 	}
 }

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

@@ -0,0 +1,67 @@
+package autorest
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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.
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+// SASTokenAuthorizer implements an authorization for SAS Token Authentication
+// this can be used for interaction with Blob Storage Endpoints
+type SASTokenAuthorizer struct {
+	sasToken string
+}
+
+// NewSASTokenAuthorizer creates a SASTokenAuthorizer using the given credentials
+func NewSASTokenAuthorizer(sasToken string) (*SASTokenAuthorizer, error) {
+	if strings.TrimSpace(sasToken) == "" {
+		return nil, fmt.Errorf("sasToken cannot be empty")
+	}
+
+	token := sasToken
+	if strings.HasPrefix(sasToken, "?") {
+		token = strings.TrimPrefix(sasToken, "?")
+	}
+
+	return &SASTokenAuthorizer{
+		sasToken: token,
+	}, nil
+}
+
+// WithAuthorization returns a PrepareDecorator that adds a shared access signature token to the
+// URI's query parameters.  This can be used for the Blob, Queue, and File Services.
+//
+// See https://docs.microsoft.com/en-us/rest/api/storageservices/delegate-access-with-shared-access-signature
+func (sas *SASTokenAuthorizer) WithAuthorization() PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err != nil {
+				return r, err
+			}
+
+			if r.URL.RawQuery != "" {
+				r.URL.RawQuery = fmt.Sprintf("%s&%s", r.URL.RawQuery, sas.sasToken)
+			} else {
+				r.URL.RawQuery = sas.sasToken
+			}
+
+			r.RequestURI = r.URL.String()
+			return Prepare(r)
+		})
+	}
+}

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

@@ -0,0 +1,304 @@
+package autorest
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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.
+
+import (
+	"bytes"
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/base64"
+	"fmt"
+	"net/http"
+	"net/url"
+	"sort"
+	"strings"
+	"time"
+)
+
+// SharedKeyType defines the enumeration for the various shared key types.
+// See https://docs.microsoft.com/en-us/rest/api/storageservices/authorize-with-shared-key for details on the shared key types.
+type SharedKeyType string
+
+const (
+	// SharedKey is used to authorize against blobs, files and queues services.
+	SharedKey SharedKeyType = "sharedKey"
+
+	// SharedKeyForTable is used to authorize against the table service.
+	SharedKeyForTable SharedKeyType = "sharedKeyTable"
+
+	// SharedKeyLite is used to authorize against blobs, files and queues services.  It's provided for
+	// backwards compatibility with API versions before 2009-09-19.  Prefer SharedKey instead.
+	SharedKeyLite SharedKeyType = "sharedKeyLite"
+
+	// SharedKeyLiteForTable is used to authorize against the table service.  It's provided for
+	// backwards compatibility with older table API versions.  Prefer SharedKeyForTable instead.
+	SharedKeyLiteForTable SharedKeyType = "sharedKeyLiteTable"
+)
+
+const (
+	headerAccept            = "Accept"
+	headerAcceptCharset     = "Accept-Charset"
+	headerContentEncoding   = "Content-Encoding"
+	headerContentLength     = "Content-Length"
+	headerContentMD5        = "Content-MD5"
+	headerContentLanguage   = "Content-Language"
+	headerIfModifiedSince   = "If-Modified-Since"
+	headerIfMatch           = "If-Match"
+	headerIfNoneMatch       = "If-None-Match"
+	headerIfUnmodifiedSince = "If-Unmodified-Since"
+	headerDate              = "Date"
+	headerXMSDate           = "X-Ms-Date"
+	headerXMSVersion        = "x-ms-version"
+	headerRange             = "Range"
+)
+
+const storageEmulatorAccountName = "devstoreaccount1"
+
+// SharedKeyAuthorizer implements an authorization for Shared Key
+// this can be used for interaction with Blob, File and Queue Storage Endpoints
+type SharedKeyAuthorizer struct {
+	accountName string
+	accountKey  []byte
+	keyType     SharedKeyType
+}
+
+// NewSharedKeyAuthorizer creates a SharedKeyAuthorizer using the provided credentials and shared key type.
+func NewSharedKeyAuthorizer(accountName, accountKey string, keyType SharedKeyType) (*SharedKeyAuthorizer, error) {
+	key, err := base64.StdEncoding.DecodeString(accountKey)
+	if err != nil {
+		return nil, fmt.Errorf("malformed storage account key: %v", err)
+	}
+	return &SharedKeyAuthorizer{
+		accountName: accountName,
+		accountKey:  key,
+		keyType:     keyType,
+	}, nil
+}
+
+// WithAuthorization returns a PrepareDecorator that adds an HTTP Authorization header whose
+// value is "<SharedKeyType> " followed by the computed key.
+// This can be used for the Blob, Queue, and File Services
+//
+// from: https://docs.microsoft.com/en-us/rest/api/storageservices/authorize-with-shared-key
+// You may use Shared Key authorization to authorize a request made against the
+// 2009-09-19 version and later of the Blob and Queue services,
+// and version 2014-02-14 and later of the File services.
+func (sk *SharedKeyAuthorizer) WithAuthorization() PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err != nil {
+				return r, err
+			}
+
+			sk, err := buildSharedKey(sk.accountName, sk.accountKey, r, sk.keyType)
+			if err != nil {
+				return r, err
+			}
+			return Prepare(r, WithHeader(headerAuthorization, sk))
+		})
+	}
+}
+
+func buildSharedKey(accName string, accKey []byte, req *http.Request, keyType SharedKeyType) (string, error) {
+	canRes, err := buildCanonicalizedResource(accName, req.URL.String(), keyType)
+	if err != nil {
+		return "", err
+	}
+
+	if req.Header == nil {
+		req.Header = http.Header{}
+	}
+
+	// ensure date is set
+	if req.Header.Get(headerDate) == "" && req.Header.Get(headerXMSDate) == "" {
+		date := time.Now().UTC().Format(http.TimeFormat)
+		req.Header.Set(headerXMSDate, date)
+	}
+	canString, err := buildCanonicalizedString(req.Method, req.Header, canRes, keyType)
+	if err != nil {
+		return "", err
+	}
+	return createAuthorizationHeader(accName, accKey, canString, keyType), nil
+}
+
+func buildCanonicalizedResource(accountName, uri string, keyType SharedKeyType) (string, error) {
+	errMsg := "buildCanonicalizedResource error: %s"
+	u, err := url.Parse(uri)
+	if err != nil {
+		return "", fmt.Errorf(errMsg, err.Error())
+	}
+
+	cr := bytes.NewBufferString("")
+	if accountName != storageEmulatorAccountName {
+		cr.WriteString("/")
+		cr.WriteString(getCanonicalizedAccountName(accountName))
+	}
+
+	if len(u.Path) > 0 {
+		// Any portion of the CanonicalizedResource string that is derived from
+		// the resource's URI should be encoded exactly as it is in the URI.
+		// -- https://msdn.microsoft.com/en-gb/library/azure/dd179428.aspx
+		cr.WriteString(u.EscapedPath())
+	}
+
+	params, err := url.ParseQuery(u.RawQuery)
+	if err != nil {
+		return "", fmt.Errorf(errMsg, err.Error())
+	}
+
+	// See https://github.com/Azure/azure-storage-net/blob/master/Lib/Common/Core/Util/AuthenticationUtility.cs#L277
+	if keyType == SharedKey {
+		if len(params) > 0 {
+			cr.WriteString("\n")
+
+			keys := []string{}
+			for key := range params {
+				keys = append(keys, key)
+			}
+			sort.Strings(keys)
+
+			completeParams := []string{}
+			for _, key := range keys {
+				if len(params[key]) > 1 {
+					sort.Strings(params[key])
+				}
+
+				completeParams = append(completeParams, fmt.Sprintf("%s:%s", key, strings.Join(params[key], ",")))
+			}
+			cr.WriteString(strings.Join(completeParams, "\n"))
+		}
+	} else {
+		// search for "comp" parameter, if exists then add it to canonicalizedresource
+		if v, ok := params["comp"]; ok {
+			cr.WriteString("?comp=" + v[0])
+		}
+	}
+
+	return string(cr.Bytes()), nil
+}
+
+func getCanonicalizedAccountName(accountName string) string {
+	// since we may be trying to access a secondary storage account, we need to
+	// remove the -secondary part of the storage name
+	return strings.TrimSuffix(accountName, "-secondary")
+}
+
+func buildCanonicalizedString(verb string, headers http.Header, canonicalizedResource string, keyType SharedKeyType) (string, error) {
+	contentLength := headers.Get(headerContentLength)
+	if contentLength == "0" {
+		contentLength = ""
+	}
+	date := headers.Get(headerDate)
+	if v := headers.Get(headerXMSDate); v != "" {
+		if keyType == SharedKey || keyType == SharedKeyLite {
+			date = ""
+		} else {
+			date = v
+		}
+	}
+	var canString string
+	switch keyType {
+	case SharedKey:
+		canString = strings.Join([]string{
+			verb,
+			headers.Get(headerContentEncoding),
+			headers.Get(headerContentLanguage),
+			contentLength,
+			headers.Get(headerContentMD5),
+			headers.Get(headerContentType),
+			date,
+			headers.Get(headerIfModifiedSince),
+			headers.Get(headerIfMatch),
+			headers.Get(headerIfNoneMatch),
+			headers.Get(headerIfUnmodifiedSince),
+			headers.Get(headerRange),
+			buildCanonicalizedHeader(headers),
+			canonicalizedResource,
+		}, "\n")
+	case SharedKeyForTable:
+		canString = strings.Join([]string{
+			verb,
+			headers.Get(headerContentMD5),
+			headers.Get(headerContentType),
+			date,
+			canonicalizedResource,
+		}, "\n")
+	case SharedKeyLite:
+		canString = strings.Join([]string{
+			verb,
+			headers.Get(headerContentMD5),
+			headers.Get(headerContentType),
+			date,
+			buildCanonicalizedHeader(headers),
+			canonicalizedResource,
+		}, "\n")
+	case SharedKeyLiteForTable:
+		canString = strings.Join([]string{
+			date,
+			canonicalizedResource,
+		}, "\n")
+	default:
+		return "", fmt.Errorf("key type '%s' is not supported", keyType)
+	}
+	return canString, nil
+}
+
+func buildCanonicalizedHeader(headers http.Header) string {
+	cm := make(map[string]string)
+
+	for k := range headers {
+		headerName := strings.TrimSpace(strings.ToLower(k))
+		if strings.HasPrefix(headerName, "x-ms-") {
+			cm[headerName] = headers.Get(k)
+		}
+	}
+
+	if len(cm) == 0 {
+		return ""
+	}
+
+	keys := []string{}
+	for key := range cm {
+		keys = append(keys, key)
+	}
+
+	sort.Strings(keys)
+
+	ch := bytes.NewBufferString("")
+
+	for _, key := range keys {
+		ch.WriteString(key)
+		ch.WriteRune(':')
+		ch.WriteString(cm[key])
+		ch.WriteRune('\n')
+	}
+
+	return strings.TrimSuffix(string(ch.Bytes()), "\n")
+}
+
+func createAuthorizationHeader(accountName string, accountKey []byte, canonicalizedString string, keyType SharedKeyType) string {
+	h := hmac.New(sha256.New, accountKey)
+	h.Write([]byte(canonicalizedString))
+	signature := base64.StdEncoding.EncodeToString(h.Sum(nil))
+	var key string
+	switch keyType {
+	case SharedKey, SharedKeyForTable:
+		key = "SharedKey"
+	case SharedKeyLite, SharedKeyLiteForTable:
+		key = "SharedKeyLite"
+	}
+	return fmt.Sprintf("%s %s:%s", key, getCanonicalizedAccountName(accountName), signature)
+}

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

@@ -167,7 +167,13 @@ func (f *Future) WaitForCompletionRef(ctx context.Context, client autorest.Clien
 		cancelCtx, cancel = context.WithTimeout(ctx, d)
 		defer cancel()
 	}
-
+	// if the initial response has a Retry-After, sleep for the specified amount of time before starting to poll
+	if delay, ok := f.GetPollingDelay(); ok {
+		if delayElapsed := autorest.DelayForBackoff(delay, 0, cancelCtx.Done()); !delayElapsed {
+			err = cancelCtx.Err()
+			return
+		}
+	}
 	done, err := f.DoneWithContext(ctx, client)
 	for attempts := 0; !done; done, err = f.DoneWithContext(ctx, client) {
 		if attempts >= client.RetryAttempts {
@@ -258,7 +264,17 @@ func (f Future) GetResult(sender autorest.Sender) (*http.Response, error) {
 	if err != nil {
 		return nil, err
 	}
-	return sender.Do(req)
+	resp, err := sender.Do(req)
+	if err == nil && resp.Body != nil {
+		// copy the body and close it so callers don't have to
+		defer resp.Body.Close()
+		b, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return resp, err
+		}
+		resp.Body = ioutil.NopCloser(bytes.NewReader(b))
+	}
+	return resp, err
 }
 
 type pollingTracker interface {

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

@@ -17,6 +17,7 @@ package azure
 //  limitations under the License.
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -143,7 +144,7 @@ type RequestError struct {
 	autorest.DetailedError
 
 	// The error returned by the Azure service.
-	ServiceError *ServiceError `json:"error"`
+	ServiceError *ServiceError `json:"error" xml:"Error"`
 
 	// The request id (from the x-ms-request-id-header) of the request.
 	RequestID string
@@ -285,26 +286,34 @@ func WithErrorUnlessStatusCode(codes ...int) autorest.RespondDecorator {
 				var e RequestError
 				defer resp.Body.Close()
 
+				encodedAs := autorest.EncodedAsJSON
+				if strings.Contains(resp.Header.Get("Content-Type"), "xml") {
+					encodedAs = autorest.EncodedAsXML
+				}
+
 				// Copy and replace the Body in case it does not contain an error object.
 				// This will leave the Body available to the caller.
-				b, decodeErr := autorest.CopyAndDecode(autorest.EncodedAsJSON, resp.Body, &e)
+				b, decodeErr := autorest.CopyAndDecode(encodedAs, resp.Body, &e)
 				resp.Body = ioutil.NopCloser(&b)
 				if decodeErr != nil {
 					return fmt.Errorf("autorest/azure: error response cannot be parsed: %q error: %v", b.String(), decodeErr)
 				}
 				if e.ServiceError == nil {
 					// Check if error is unwrapped ServiceError
-					if err := json.Unmarshal(b.Bytes(), &e.ServiceError); err != nil {
+					decoder := autorest.NewDecoder(encodedAs, bytes.NewReader(b.Bytes()))
+					if err := decoder.Decode(&e.ServiceError); err != nil {
 						return err
 					}
 				}
 				if e.ServiceError.Message == "" {
 					// if we're here it means the returned error wasn't OData v4 compliant.
-					// try to unmarshal the body as raw JSON in hopes of getting something.
+					// try to unmarshal the body in hopes of getting something.
 					rawBody := map[string]interface{}{}
-					if err := json.Unmarshal(b.Bytes(), &rawBody); err != nil {
+					decoder := autorest.NewDecoder(encodedAs, bytes.NewReader(b.Bytes()))
+					if err := decoder.Decode(&rawBody); err != nil {
 						return err
 					}
+
 					e.ServiceError = &ServiceError{
 						Code:    "Unknown",
 						Message: "Unknown service error",

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

@@ -127,7 +127,7 @@ var (
 		KeyVaultDNSSuffix:            "vault.usgovcloudapi.net",
 		ServiceBusEndpointSuffix:     "servicebus.usgovcloudapi.net",
 		ServiceManagementVMDNSSuffix: "usgovcloudapp.net",
-		ResourceManagerVMDNSSuffix:   "cloudapp.windowsazure.us",
+		ResourceManagerVMDNSSuffix:   "cloudapp.usgovcloudapi.net",
 		ContainerRegistryDNSSuffix:   "azurecr.us",
 		CosmosDBDNSSuffix:            "documents.azure.us",
 		TokenAudience:                "https://management.usgovcloudapi.net/",
@@ -160,7 +160,7 @@ var (
 		KeyVaultDNSSuffix:            "vault.azure.cn",
 		ServiceBusEndpointSuffix:     "servicebus.chinacloudapi.cn",
 		ServiceManagementVMDNSSuffix: "chinacloudapp.cn",
-		ResourceManagerVMDNSSuffix:   "cloudapp.azure.cn",
+		ResourceManagerVMDNSSuffix:   "cloudapp.chinacloudapi.cn",
 		ContainerRegistryDNSSuffix:   "azurecr.cn",
 		CosmosDBDNSSuffix:            "documents.azure.cn",
 		TokenAudience:                "https://management.chinacloudapi.cn/",
@@ -242,3 +242,8 @@ func EnvironmentFromFile(location string) (unmarshaled Environment, err error) {
 
 	return
 }
+
+// SetEnvironment updates the environment map with the specified values.
+func SetEnvironment(name string, env Environment) {
+	environments[strings.ToUpper(name)] = env
+}

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

@@ -47,11 +47,15 @@ func DoRetryWithRegistration(client autorest.Client) autorest.SendDecorator {
 				if resp.StatusCode != http.StatusConflict || client.SkipResourceProviderRegistration {
 					return resp, err
 				}
+
 				var re RequestError
-				err = autorest.Respond(
+				if strings.Contains(r.Header.Get("Content-Type"), "xml") {
-					resp,
+					// XML errors (e.g. Storage Data Plane) only return the inner object
-					autorest.ByUnmarshallingJSON(&re),
+					err = autorest.Respond(resp, autorest.ByUnmarshallingXML(&re.ServiceError))
-				)
+				} else {
+					err = autorest.Respond(resp, autorest.ByUnmarshallingJSON(&re))
+				}
+
 				if err != nil {
 					return resp, err
 				}

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

@@ -179,6 +179,11 @@ type Client struct {
 
 	// Set to true to skip attempted registration of resource providers (false by default).
 	SkipResourceProviderRegistration bool
+
+	// SendDecorators can be used to override the default chain of SendDecorators.
+	// This can be used to specify things like a custom retry SendDecorator.
+	// Set this to an empty slice to use no SendDecorators.
+	SendDecorators []SendDecorator
 }
 
 // NewClientWithUserAgent returns an instance of a Client with the UserAgent set to the passed
@@ -298,3 +303,21 @@ func (c Client) ByInspecting() RespondDecorator {
 	}
 	return c.ResponseInspector
 }
+
+// Send sends the provided http.Request using the client's Sender or the default sender.
+// It returns the http.Response and possible error. It also accepts a, possibly empty,
+// default set of SendDecorators used when sending the request.
+// SendDecorators have the following precedence:
+// 1. In a request's context via WithSendDecorators()
+// 2. Specified on the client in SendDecorators
+// 3. The default values specified in this method
+func (c Client) Send(req *http.Request, decorators ...SendDecorator) (*http.Response, error) {
+	if c.SendDecorators != nil {
+		decorators = c.SendDecorators
+	}
+	inCtx := req.Context().Value(ctxSendDecorators{})
+	if sd, ok := inCtx.([]SendDecorator); ok {
+		decorators = sd
+	}
+	return SendWithSender(c, req, decorators...)
+}

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

@@ -1,3 +1,5 @@
 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

@@ -0,0 +1,2 @@
+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=

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

@@ -0,0 +1,24 @@
+// +build modhack
+
+package date
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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.
+
+// This file, and the github.com/Azure/go-autorest import, won't actually become part of
+// the resultant binary.
+
+// Necessary for safely adding multi-module repo.
+// See: https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository
+import _ "github.com/Azure/go-autorest"

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

@@ -3,9 +3,10 @@ module github.com/Azure/go-autorest/autorest
 go 1.12
 
 require (
-	github.com/Azure/go-autorest/autorest/adal v0.5.0
+	github.com/Azure/go-autorest v14.2.0+incompatible
-	github.com/Azure/go-autorest/autorest/mocks v0.2.0
+	github.com/Azure/go-autorest/autorest/adal v0.9.0
-	github.com/Azure/go-autorest/logger v0.1.0
+	github.com/Azure/go-autorest/autorest/mocks v0.4.0
-	github.com/Azure/go-autorest/tracing v0.5.0
+	github.com/Azure/go-autorest/logger v0.2.0
-	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2
+	github.com/Azure/go-autorest/tracing v0.6.0
+	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
 )

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

@@ -1,18 +1,23 @@
-github.com/Azure/go-autorest/autorest/adal v0.5.0 h1:q2gDruN08/guU9vAjuPWff0+QIrpH6ediguzdAzXAUU=
+github.com/Azure/go-autorest v14.2.0+incompatible h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=
-github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
+github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
-github.com/Azure/go-autorest/autorest/date v0.1.0 h1:YGrhWfrgtFs84+h0o46rJrlmsZtyZRg470CqAXTZaGM=
+github.com/Azure/go-autorest/autorest/adal v0.9.0 h1:SigMbuFNuKgc1xcGhaeapbh+8fgsu+GxgDRFyg7f5lM=
-github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
+github.com/Azure/go-autorest/autorest/adal v0.9.0/go.mod h1:/c022QCutn2P7uY+/oQWWNcK9YU+MH96NgK+jErpbcg=
-github.com/Azure/go-autorest/autorest/mocks v0.1.0 h1:Kx+AUU2Te+A3JIyYn6Dfs+cFgx5XorQKuIXrZGoq/SI=
+github.com/Azure/go-autorest/autorest/date v0.3.0 h1:7gUk1U5M/CQbp9WoqinNzJar+8KY+LPI6wiWrP/myHw=
-github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
+github.com/Azure/go-autorest/autorest/date v0.3.0/go.mod h1:BI0uouVdmngYNUzGWeSYnokU+TrmwEsOqdt8Y6sso74=
-github.com/Azure/go-autorest/autorest/mocks v0.2.0 h1:Ww5g4zThfD/6cLb4z6xxgeyDa7QDkizMkJKe0ysZXp0=
+github.com/Azure/go-autorest/autorest/mocks v0.4.0 h1:z20OWOSG5aCye0HEkDp6TPmP17ZcfeMxPi6HnSALa8c=
-github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
+github.com/Azure/go-autorest/autorest/mocks v0.4.0/go.mod h1:LTp+uSrOhSkaKrUy935gNZuuIPPVsHlr9DSOxSayd+k=
-github.com/Azure/go-autorest/logger v0.1.0 h1:ruG4BSDXONFRrZZJ2GUXDiUyVpayPmb1GnWeHDdaNKY=
+github.com/Azure/go-autorest/logger v0.2.0 h1:e4RVHVZKC5p6UANLJHkM4OfR1UKZPj8Wt8Pcx+3oqrE=
-github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
+github.com/Azure/go-autorest/logger v0.2.0/go.mod h1:T9E3cAhj2VqvPOtCYAvby9aBXkZmbF5NWuPV8+WeEW8=
-github.com/Azure/go-autorest/tracing v0.5.0 h1:TRn4WjSnkcSy5AEG3pnbtFSwNtwzjr4VYyQflFE619k=
+github.com/Azure/go-autorest/tracing v0.6.0 h1:TYi4+3m5t6K48TGI9AUdb+IzbnSxvnvUMfuitfgcfuo=
-github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
+github.com/Azure/go-autorest/tracing v0.6.0/go.mod h1:+vhtPC754Xsa23ID7GlGsrdKBpUA79WCAKPPZVC2DeU=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 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 v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
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