bump chart to 0.1.0

Clean e2e test so it's easier to extend it

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,46 @@
+---
+name: Bug report
+about: Create a bug report to help improve descheduler
+title: ''
+labels: 'kind/bug'
+assignees: ''
+
+---
+
+<!-- Please answer these questions before submitting your bug report. Thanks! -->
+
+**What version of descheduler are you using?**
+
+descheduler version:
+
+
+**Does this issue reproduce with the latest release?**
+
+
+**Which descheduler CLI options are you using?**
+
+
+**Please provide a copy of your descheduler policy config file**
+
+
+**What k8s version are you using (`kubectl version`)?**
+
+<details><summary><code>kubectl version</code> Output</summary><br><pre>
+$ kubectl version
+
+</pre></details>
+
+
+**What did you do?**
+
+<!--
+If possible, provide a recipe for reproducing the error.
+A detailed sequence of steps describing what to do to observe the issue is good.
+A complete runnable bash shell script is best.
+-->
+
+
+**What did you expect to see?**
+
+
+**What did you see instead?**

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,26 @@
+---
+name: Feature request
+about: Suggest an idea for descheduler
+title: ''
+labels: 'kind/feature'
+assignees: ''
+
+---
+
+<!-- Please answer these questions before submitting your feature request. Thanks! -->
+
+**Is your feature request related to a problem? Please describe.**
+<!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
+
+**Describe the solution you'd like**
+<!-- A clear and concise description of what you want to happen. -->
+
+**Describe alternatives you've considered**
+<!-- A clear and concise description of any alternative solutions or features you've considered. -->
+
+**What version of descheduler are you using?**
+
+descheduler version:
+
+**Additional context**
+<!-- Add any other context or screenshots about the feature request here. -->

.github/ISSUE_TEMPLATE/misc_request.md

@@ -0,0 +1,18 @@
+---
+name: Miscellaneous
+about: Not a bug and not a feature
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!--
+Please do not use this to submit a bug report or feature request. Use the
+bug report or feature request options instead.
+
+Also, please consider posting in the Kubernetes Slack #sig-scheduling channel
+instead of opening an issue if this is a support request.
+
+Thanks!
+-->

.github/workflows/release.yaml

@@ -0,0 +1,30 @@
+name: Release Charts
+
+on:
+  push:
+    tags:
+      - chart-*
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      - name: Fetch history
+        run: git fetch --prune --unshallow
+
+      - name: Add dependency chart repos
+        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
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.gitignore

@@ -0,0 +1,5 @@
+_output/
+_tmp/
+vendordiff.patch
+.idea/
+*.code-workspace

.golangci.yml

@@ -0,0 +1,15 @@
+run:
+  deadline: 2m
+
+linters:
+  disable-all: true
+  enable:
+    - gofmt
+    - gosimple
+    - gocyclo
+    - misspell
+    - govet
+
+linters-settings:
+  goimports:
+local-prefixes: sigs.k8s.io/descheduler

.travis.yml

@@ -1,7 +0,0 @@
-language: go
-go:
-  - 1.9.1
-script:
-- hack/verify-gofmt.sh
-- make build
-- make test-unit

CONTRIBUTING.md

@@ -0,0 +1,23 @@
+# Contributing Guidelines
+
+Welcome to Kubernetes. We are excited about the prospect of you joining our [community](https://github.com/kubernetes/community)! The Kubernetes community abides by the CNCF [code of conduct](code-of-conduct.md). Here is an excerpt:
+
+_As contributors and maintainers of this project, and in the interest of fostering an open and welcoming community, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation, submitting pull requests or patches, and other activities._
+
+## Getting Started
+
+We have full documentation on how to get started contributing here:
+
+- [Contributor License Agreement](https://git.k8s.io/community/CLA.md) Kubernetes projects require that you sign a Contributor License Agreement (CLA) before we can accept your pull requests
+- [Kubernetes Contributor Guide](http://git.k8s.io/community/contributors/guide) - Main contributor documentation, or you can just jump directly to the [contributing section](http://git.k8s.io/community/contributors/guide#contributing)
+- [Contributor Cheat Sheet](https://git.k8s.io/community/contributors/guide/contributor-cheatsheet/README.md) - Common resources for existing developers
+
+## Mentorship
+
+- [Mentoring Initiatives](https://git.k8s.io/community/mentoring) - We have a diverse set of mentorship programs available that are always looking for volunteers!
+
+
+## Contact Information
+
+- [Slack channel](https://kubernetes.slack.com/messages/sig-scheduling)
+- [Mailing list](https://groups.google.com/forum/#!forum/kubernetes-sig-scheduling)

Dockerfile

@@ -11,16 +11,16 @@
 # 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:1.9.2
+FROM golang:1.14.4
 
-WORKDIR /go/src/github.com/kubernetes-incubator/descheduler
+WORKDIR /go/src/sigs.k8s.io/descheduler
 COPY . .
 RUN make
 
 FROM scratch
 
-MAINTAINER Avesh Agarwal <avagarwa@redhat.com>
+MAINTAINER Avesh Agarwal <avesh.ncsu@gmail.com>
 
-COPY --from=0 /go/src/github.com/kubernetes-incubator/descheduler/_output/bin/descheduler /bin/descheduler
+COPY --from=0 /go/src/sigs.k8s.io/descheduler/_output/bin/descheduler /bin/descheduler
 
 CMD ["/bin/descheduler", "--help"]

Dockerfile.dev

@@ -13,7 +13,7 @@
 # limitations under the License.
 FROM scratch
 
-MAINTAINER Avesh Agarwal <avagarwa@redhat.com>
+MAINTAINER Avesh Agarwal <avesh.ncsu@gmail.com>
 
 COPY _output/bin/descheduler /bin/descheduler
 

Makefile

@@ -15,22 +15,38 @@
 .PHONY: test
 
 # VERSION is currently based on the last commit
-VERSION=`git describe --tags`
-COMMIT=`git rev-parse HEAD`
-BUILD=`date +%FT%T%z`
-LDFLAG_LOCATION=github.com/kubernetes-incubator/descheduler/cmd/descheduler/app
+VERSION?=$(shell git describe --tags)
+COMMIT=$(shell git rev-parse HEAD)
+BUILD=$(shell date +%FT%T%z)
+LDFLAG_LOCATION=sigs.k8s.io/descheduler/cmd/descheduler/app
 
 LDFLAGS=-ldflags "-X ${LDFLAG_LOCATION}.version=${VERSION} -X ${LDFLAG_LOCATION}.buildDate=${BUILD} -X ${LDFLAG_LOCATION}.gitCommit=${COMMIT}"
 
+GOLANGCI_VERSION := v1.15.0
+HAS_GOLANGCI := $(shell ls _output/bin/golangci-lint)
+
+# REGISTRY is the container registry to push
+# into. The default is to push to the staging
+# registry, not production.
+REGISTRY?=gcr.io/k8s-staging-descheduler
 
 # IMAGE is the image name of descheduler
-# Should this be changed?
 IMAGE:=descheduler:$(VERSION)
 
+# IMAGE_GCLOUD is the image name of descheduler in the remote registry
+IMAGE_GCLOUD:=$(REGISTRY)/descheduler:$(VERSION)
+
+# TODO: upload binaries to GCS bucket
+#
+# In the future binaries can be uploaded to
+# GCS bucket gs://k8s-staging-descheduler.
+
+HAS_HELM := $(shell which helm)
+
 all: build
 
 build:
-	CGO_ENABLED=0 go build ${LDFLAGS} -o _output/bin/descheduler github.com/kubernetes-incubator/descheduler/cmd/descheduler
+	CGO_ENABLED=0 go build ${LDFLAGS} -o _output/bin/descheduler sigs.k8s.io/descheduler/cmd/descheduler
 
 dev-image: build
 	docker build -f Dockerfile.dev -t $(IMAGE) .
@@ -38,9 +54,24 @@ dev-image: build
 image:
 	docker build -t $(IMAGE) .
 
+push-container-to-gcloud: image
+	gcloud auth configure-docker
+	docker tag $(IMAGE) $(IMAGE_GCLOUD)
+	docker push $(IMAGE_GCLOUD)
+
+push: push-container-to-gcloud
+
 clean:
 	rm -rf _output
 
+verify: verify-gofmt verify-vendor lint lint-chart
+
+verify-gofmt:
+	./hack/verify-gofmt.sh
+
+verify-vendor:
+	./hack/verify-vendor.sh
+
 test-unit:
 	./test/run-unit-tests.sh
 
@@ -48,7 +79,18 @@ test-e2e:
 	./test/run-e2e-tests.sh
 
 gen:
-	./hack/update-codecgen.sh
 	./hack/update-generated-conversions.sh
 	./hack/update-generated-deep-copies.sh
 	./hack/update-generated-defaulters.sh
+
+lint:
+ifndef HAS_GOLANGCI
+	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b ./_output/bin ${GOLANGCI_VERSION}
+endif
+	./_output/bin/golangci-lint run
+
+lint-chart:
+ifndef HAS_HELM
+	curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 && chmod 700 ./get_helm.sh && ./get_helm.sh
+endif
+	helm lint ./charts/descheduler

OWNERS

@@ -1,8 +1,12 @@
 approvers:
 - aveshagarwal
+- k82cn
 - ravisantoshgudimetla
-- jayunit100
+- damemi
 reviewers:
 - aveshagarwal
+- k82cn
 - ravisantoshgudimetla
-- jayunit100
+- damemi
+- seanmalloy
+- ingvagabund

README.md

@@ -1,5 +1,4 @@
-[![Build Status](https://travis-ci.org/kubernetes-incubator/descheduler.svg?branch=master)](https://travis-ci.org/kubernetes-incubator/descheduler)
-[![Go Report Card](https://goreportcard.com/badge/github.com/kubernetes-incubator/descheduler)](https://goreportcard.com/report/github.com/kubernetes-incubator/descheduler)
+[![Go Report Card](https://goreportcard.com/badge/kubernetes-sigs/descheduler)](https://goreportcard.com/report/sigs.k8s.io/descheduler)
 
 # Descheduler for Kubernetes
 
@@ -9,8 +8,8 @@ Scheduling in Kubernetes is the process of binding pending pods to nodes, and is
 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
 rules, called predicates and priorities. The scheduler's decisions are influenced by its view of
-a Kubernetes cluster at that point of time when a new pod appears first time for scheduling.
-As Kubernetes clusters are very dynamic and their state change over time, there may be desired
+a Kubernetes cluster at that point of time when a new pod appears for scheduling.
+As Kubernetes clusters are very dynamic and their state changes over time, there may be desire
 to move already running pods to some other nodes for various reasons:
 
 * Some nodes are under or over utilized.
@@ -24,164 +23,63 @@ 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.
 
-## Build and Run
+## Quick Start
 
-Build descheduler:
+The descheduler can be run as a Job or CronJob inside of a k8s cluster. It has the
+advantage of being able to be run multiple times without needing user intervention.
+The descheduler pod is run as a critical pod in the `kube-system` namespace to avoid
+being evicted by itself or by the kubelet.
 
-```sh
-$ make
-```
-
-and run descheduler:
-
-```sh
-$ ./_output/bin/descheduler --kubeconfig <path to kubeconfig> --policy-config-file <path-to-policy-file>
-```
-
-For more information about available options run:
-```
-$ ./_output/bin/descheduler --help
-```
-
-## Running Descheduler as a Job Inside of a Pod
-
-Descheduler can be run as a job inside of a pod. It has the advantage of
-being able to be run multiple times without needing user intervention.
-Descheduler pod is run as a critical pod to avoid being evicted by itself,
-or by kubelet due to an eviction event. Since critical pods are created in
-`kube-system` namespace, descheduler job and its pod will also be created
-in `kube-system` namespace.
-
-###  Create a container image
-
-First we create a simple Docker image utilizing the Dockerfile found in the root directory:
+### Run As A Job
 
 ```
-$ make dev-image
+kubectl create -f kubernetes/rbac.yaml
+kubectl create -f kubernetes/configmap.yaml
+kubectl create -f kubernetes/job.yaml
 ```
 
-This creates an image based off the binary we've built before. To build both the
-binary and image in one step you can run the following command:
+### Run As A CronJob
 
 ```
-$ make image
+kubectl create -f kubernetes/rbac.yaml
+kubectl create -f kubernetes/configmap.yaml
+kubectl create -f kubernetes/cronjob.yaml
 ```
 
-This eliminates the need to have Go installed locally and builds the binary
-within it's own container.
+## User Guide
 
-### Create a cluster role
-
-To give necessary permissions for the descheduler to work in a pod, create a cluster role:
-
-```
-$ cat << EOF| kubectl create -f -
-kind: ClusterRole
-apiVersion: rbac.authorization.k8s.io/v1beta1
-metadata:
-  name: descheduler-cluster-role
-rules:
-- apiGroups: [""]
-  resources: ["nodes"]
-  verbs: ["get", "watch", "list"]
-- apiGroups: [""]
-  resources: ["pods"]
-  verbs: ["get", "watch", "list", "delete"]
-- apiGroups: [""]
-  resources: ["pods/eviction"]
-  verbs: ["create"]
-EOF
-```
-
-### Create the service account which will be used to run the job:
-
-```
-$ kubectl create sa descheduler-sa -n kube-system
-```
-
-### Bind the cluster role to the service account:
-
-```
-$ kubectl create clusterrolebinding descheduler-cluster-role-binding \
-    --clusterrole=descheduler-cluster-role \
-    --serviceaccount=kube-system:descheduler-sa
-```
-### Create a configmap to store descheduler policy
-
-Descheduler policy is created as a ConfigMap in `kube-system` namespace
-so that it can be mounted as a volume inside pod.
-
-```
-$ kubectl create configmap descheduler-policy-configmap \
-     -n kube-system --from-file=<path-to-policy-dir/policy.yaml>
-```
-### Create the job specification (descheduler-job.yaml)
-
-```
-apiVersion: batch/v1
-kind: Job
-metadata:
-  name: descheduler-job
-  namespace: kube-system
-spec:
-  parallelism: 1
-  completions: 1
-  template:
-    metadata:
-      name: descheduler-pod
-      annotations:
-        scheduler.alpha.kubernetes.io/critical-pod: ""
-    spec:
-        containers:
-        - name: descheduler
-          image: descheduler
-          volumeMounts:
-          - mountPath: /policy-dir
-            name: policy-volume
-          command:
-          - "/bin/sh"
-          - "-ec"
-          - |
-            /bin/descheduler --policy-config-file /policy-dir/policy.yaml
-        restartPolicy: "Never"
-        serviceAccountName: descheduler-sa
-        volumes:
-        - name: policy-volume
-          configMap:
-            name: descheduler-policy-configmap
-```
-
-Please note that the pod template is configured with critical pod annotation, and
-the policy `policy-file` is mounted as a volume from the config map.
-
-### Run the descheduler as a job in a pod:
-```
-$ kubectl create -f descheduler-job.yaml
-```
+See the [user guide](docs/user-guide.md) in the `/docs` directory.
 
 ## Policy and Strategies
 
-Descheduler's policy is configurable and includes strategies to be enabled or disabled.
-Four strategies, `RemoveDuplicates`, `LowNodeUtilization`, `RemovePodsViolatingInterPodAntiAffinity`, `RemovePodsViolatingNodeAffinity` are currently implemented.
-As part of the policy, the parameters associated with the strategies can be configured too.
+Descheduler's policy is configurable and includes strategies that can be enabled or disabled.
+Seven strategies `RemoveDuplicates`, `LowNodeUtilization`, `RemovePodsViolatingInterPodAntiAffinity`,
+`RemovePodsViolatingNodeAffinity`, `RemovePodsViolatingNodeTaints`, `RemovePodsHavingTooManyRestarts`, and `PodLifeTime`
+are currently implemented. As part of the policy, the parameters associated with the strategies can be configured too.
 By default, all strategies are enabled.
 
 ### RemoveDuplicates
 
 This strategy makes sure that there is only one pod associated with a Replica Set (RS),
-Replication Controller (RC), Deployment, or Job running on same node. If there are more,
+Replication Controller (RC), Deployment, or Job running on the same node. If there are more,
 those duplicate pods are evicted for better spreading of pods in a cluster. This issue could happen
 if some nodes went down due to whatever reasons, and pods on them were moved to other nodes leading to
-more than one pod associated with RS or RC, for example, running on same node. Once the failed nodes
-are ready again, this strategy could be enabled to evict those duplicate pods. Currently, there are no
-parameters associated with this strategy. To disable this strategy, the policy should look like:
+more than one pod associated with a RS or RC, for example, running on the same node. Once the failed nodes
+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.
 
 ```
 apiVersion: "descheduler/v1alpha1"
 kind: "DeschedulerPolicy"
 strategies:
   "RemoveDuplicates":
-     enabled: false
+     enabled: true
+     params:
+       removeDuplicates:
+         excludeOwnerKinds:
+         - "ReplicaSet"
 ```
 
 ### LowNodeUtilization
@@ -190,18 +88,19 @@ This strategy finds nodes that are under utilized and evicts pods, if possible,
 in the hope that recreation of evicted pods will be scheduled on these underutilized nodes. The
 parameters of this strategy are configured under `nodeResourceUtilizationThresholds`.
 
-The under utilization of nodes is determined by a configurable threshold, `thresholds`. The threshold
+The under utilization of nodes is determined by a configurable threshold `thresholds`. The threshold
 `thresholds` can be configured for cpu, memory, and number of pods in terms of percentage. If a node's
 usage is below threshold for all (cpu, memory, and number of pods), the node is considered underutilized.
-Currently, pods' request resource requirements are considered for computing node resource utilization.
+Currently, pods request resource requirements are considered for computing node resource utilization.
 
 There is another configurable threshold, `targetThresholds`, that is used to compute those potential nodes
-from where pods could be evicted. Any node, between the thresholds, `thresholds` and `targetThresholds` is
+from where pods could be evicted. If a node's usage is above targetThreshold for any (cpu, memory, or number of pods),
+the node is considered over utilized. Any node between the thresholds, `thresholds` and `targetThresholds` is
 considered appropriately utilized and is not considered for eviction. The threshold, `targetThresholds`,
 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.
-An example of the policy for this strategy would look like:
+Here is an example of a policy for this strategy:
 
 ```
 apiVersion: "descheduler/v1alpha1"
@@ -221,14 +120,28 @@ strategies:
            "pods": 50
 ```
 
-There is another parameter associated with `LowNodeUtilization` strategy, called `numberOfNodes`.
-This parameter can be configured to activate the strategy only when number of under utilized nodes
+Policy should pass the following validation checks:
+* Only three types of resources are supported: `cpu`, `memory` and `pods`.
+* `thresholds` or `targetThresholds` can not be nil and they must configure exactly the same types of resources.
+* The valid range of the resource's percentage value is \[0, 100\]
+* Percentage value of `thresholds` can not be greater than `targetThresholds` for the same resource.
+
+If any of the resource types is not specified, all its thresholds default to 100% to avoid nodes going
+from underutilized to overutilized.
+
+There is another parameter associated with the `LowNodeUtilization` strategy, called `numberOfNodes`.
+This parameter can be configured to activate the strategy only when the number of under utilized nodes
 are above the configured value. This could be helpful in large clusters where a few nodes could go
 under utilized frequently or for a short period of time. By default, `numberOfNodes` is set to zero.
 
 ### RemovePodsViolatingInterPodAntiAffinity
 
-This strategy makes sure that pods violating interpod anti-affinity are removed from nodes. For example, if there is podA on node and podB and podC(running on same node) have antiaffinity 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 pods B,C are created when they are already running on node. Currently, there are no parameters associated with this strategy. To disable this strategy, the policy should look like:
+This strategy makes sure that pods violating interpod anti-affinity are removed from nodes. For example,
+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
+policy should look like:
 
 ```
 apiVersion: "descheduler/v1alpha1"
@@ -240,7 +153,23 @@ strategies:
 
 ### RemovePodsViolatingNodeAffinity
 
-This strategy makes sure that pods violating node affinity are removed from nodes. For example, there is podA that was scheduled on nodeA which satisfied the node affinity rule `requiredDuringSchedulingIgnoredDuringExecution` at the time of scheduling, but over time nodeA no longer satisfies the rule, then if another node nodeB is available that satisfies the node affinity rule, then podA will be evicted from nodeA. The policy file should like this -
+This strategy makes sure all pods violating
+[node affinity](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#node-affinity)
+are eventually removed from nodes. Node affinity rules allow a pod to specify
+`requiredDuringSchedulingIgnoredDuringExecution` type, which tells the scheduler
+to respect node affinity when scheduling the pod but kubelet to ignore
+in case node changes over time and no longer respects the affinity.
+When enabled, the strategy serves as a temporary implementation
+of `requiredDuringSchedulingRequiredDuringExecution` and evicts pod for kubelet
+that no longer respects node affinity.
+
+For example, there is podA scheduled on nodeA which satisfies the node
+affinity rule `requiredDuringSchedulingIgnoredDuringExecution` at the time
+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:
 
 ```
 apiVersion: "descheduler/v1alpha1"
@@ -253,43 +182,136 @@ strategies:
       - "requiredDuringSchedulingIgnoredDuringExecution"
 ```
 
+### RemovePodsViolatingNodeTaints
+
+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:
+
+````
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "RemovePodsViolatingNodeTaints":
+    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.
+
+```
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "RemovePodsHavingTooManyRestarts":
+     enabled: true
+     params:
+       podsHavingTooManyRestarts:
+         podRestartThreshold: 100
+         includingInitContainers: true
+```
+
+### PodLifeTime
+
+This strategy evicts pods that are older than `.strategies.PodLifeTime.params.maxPodLifeTimeSeconds` The policy
+file should look like:
+
+````
+apiVersion: "descheduler/v1alpha1"
+kind: "DeschedulerPolicy"
+strategies:
+  "PodLifeTime":
+     enabled: true
+     params:
+        maxPodLifeTimeSeconds: 86400
+````
+
 ## Pod Evictions
 
-When the descheduler decides to evict pods from a node, it employs following general mechanism:
+When the descheduler decides to evict pods from a node, it employs the following general mechanism:
 
-* Critical pods (with annotations scheduler.alpha.kubernetes.io/critical-pod) are never evicted.
-* Pods (static or mirrored pods or stand alone pods) not part of an RC, RS, Deployment or Jobs are
+* [Critical pods](https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/) (with priorityClassName set to system-cluster-critical or system-node-critical) are never evicted.
+* 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.
-* Best efforts pods are evicted before Burstable and Guaranteed pods.
+* 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
+  annotation is used to override checks which prevent eviction and users can select which pod is evicted.
+  Users should know how and if the pod will be recreated.
 
-### Pod disruption Budget (PDB)
-Pods subject to Pod Disruption Budget (PDB) are not evicted if descheduling violates its pod
-disruption budget (PDB). The pods are evicted by using eviction subresource to handle PDB.
+Setting `--v=4` or greater on the Descheduler will log all reasons why any pod is not evictable.
+
+### Pod Disruption Budget (PDB)
+
+Pods subject to a Pod Disruption Budget(PDB) are not evicted if descheduling violates its PDB. The pods
+are evicted by using the eviction subresource to handle PDB.
+
+## Compatibility Matrix
+The below compatibility matrix shows the k8s client package(client-go, apimachinery, etc) versions that descheduler
+is compiled with. At this time descheduler does not have a hard dependency to a specific k8s release. However a
+particular descheduler release is only tested against the three latest k8s minor versions. For example descheduler
+v0.18 should work with k8s v1.18, v1.17, and v1.16.
+
+Starting with descheduler release v0.18 the minor version of descheduler matches the minor version of the k8s client
+packages that it is compiled with.
+
+Descheduler  | Supported Kubernetes Version
+-------------|-----------------------------
+v0.18        | v1.18
+v0.10        | v1.17
+v0.4-v0.9    | v1.9+
+v0.1-v0.3    | v1.7-v1.8
+
+
+## Getting Involved and Contributing
+
+Are you interested in contributing to descheduler? We, the
+maintainers and community, would love your suggestions, contributions, and help!
+Also, the maintainers can be contacted at any time to learn more about how to get
+involved.
+
+To get started writing code see the [contributor guide](docs/contributor-guide.md) in the `/docs` directory.
+
+In the interest of getting more new people involved we tag issues with
+[`good first issue`][good_first_issue].
+These are typically issues that have smaller scope but are good ways to start
+to get acquainted with the codebase.
+
+We also encourage ALL active community participants to act as if they are
+maintainers, even if you don't have "official" write permissions. This is a
+community effort, we are here to serve the Kubernetes community. If you have an
+active interest and you want to get involved, you have real power! Don't assume
+that the only people who can get things done around here are the "maintainers".
+
+We also would love to add more "official" maintainers, so show us what you can
+do!
+
+This repository uses the Kubernetes bots. See a full list of the commands [here][prow].
+
+### Communicating With Contributors
+
+You can reach the contributors of this project at:
+
+- [Slack channel](https://kubernetes.slack.com/messages/sig-scheduling)
+- [Mailing list](https://groups.google.com/forum/#!forum/kubernetes-sig-scheduling)
+
+Learn how to engage with the Kubernetes community on the [community page](http://kubernetes.io/community/).
 
 ## Roadmap
 
 This roadmap is not in any particular order.
 
-* Strategy to consider taints and tolerations
 * Consideration of pod affinity
-* Strategy to consider pod life time
 * Strategy to consider number of pending pods
 * Integration with cluster autoscaler
 * Integration with metrics providers for obtaining real load metrics
 * Consideration of Kubernetes's scheduler's predicates
 
 
-## Compatibility matrix
+### Code of conduct
 
-Descheduler  | supported Kubernetes version
--------------|-----------------------------
-0.4          | 1.9+
-0.1-0.3      | 1.7-1.8
-
-## Note
-
-This project is under active development, and is not intended for production use.
-Any api could be changed any time with out any notice. That said, your feedback is
-very important and appreciated to make this project more stable and useful.
+Participation in the Kubernetes community is governed by the [Kubernetes Code of Conduct](code-of-conduct.md).

SECURITY_CONTACTS

@@ -11,4 +11,5 @@
 # INSTRUCTIONS AT https://kubernetes.io/security/
 
 aveshagarwal
+k82cn
 ravisantoshgudimetla

charts/descheduler/.helmignore

@@ -0,0 +1,22 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/descheduler/Chart.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+name: descheduler
+version: 0.1.0
+appVersion: 0.18.0
+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
+- descheduler
+- kube-scheduler
+home: https://github.com/kubernetes-sigs/descheduler
+icon: https://kubernetes.io/images/favicon.png
+sources:
+- https://github.com/kubernetes-sigs/descheduler
+maintainers:
+- name: stevehipwell
+  email: steve.hipwell@github.com

charts/descheduler/README.md

@@ -0,0 +1,59 @@
+# Descheduler for Kubernetes
+
+[Descheduler](https://github.com/kubernetes-sigs/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.
+
+## TL;DR:
+
+```shell
+helm repo add descheduler https://kubernetes-sigs.github.io/descheduler/
+$ helm install descheduler/descheduler --name my-release
+```
+
+## 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.
+
+## Prerequisites
+
+- Kubernetes 1.14+
+
+## Installing the Chart
+
+To install the chart with the release name `my-release`:
+
+```shell
+helm install --name 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.
+
+> **Tip**: List all releases using `helm list`
+
+## Uninstalling the Chart
+
+To uninstall/delete the `my-release` deployment:
+
+```shell
+helm delete my-release
+```
+
+The command removes all the Kubernetes components associated with the chart and deletes the release.
+
+## Configuration
+
+The following table lists the configurable parameters of the _descheduler_ chart and their default values.
+
+| Parameter                      | Description                                                                                                           | Default                                                |
+| ------------------------------ | --------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------ |
+| `image.repository`             | Docker repository to use                                                                                              | `us.gcr.io/k8s-artifacts-prod/descheduler/descheduler` |
+| `image.tag`                    | Docker tag to use                                                                                                     | `v[chart appVersion]`                                              |
+| `image.pullPolicy`             | Docker image pull policy                                                                                              | `IfNotPresent`                                         |
+| `nameOverride`                 | String to partially override `descheduler.fullname` template (will prepend the release name)                          | `""`                                                   |
+| `fullnameOverride`             | String to fully override `descheduler.fullname` template                                                              | `""`                                                   |
+| `schedule`                     | The cron schedule to run the _descheduler_ job on                                                                     | `"*/2 * * * *"`                                        |
+| `cmdOptions`                   | The options to pass to the _descheduler_ command                                                                      | _see values.yaml_                                      |
+| `deschedulerPolicy.strategies` | The _descheduler_ strategies to apply                                                                                 | _see values.yaml_                                      |
+| `priorityClassName`            | The name of the priority class to add to pods                                                                         | `system-cluster-critical`                              |
+| `rbac.create`                  | If `true`, create & use RBAC resources                                                                                | `true`                                                 |
+| `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/NOTES.txt

@@ -0,0 +1 @@
+Descheduler installed as a cron job.

charts/descheduler/templates/_helpers.tpl

@@ -0,0 +1,56 @@
+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "descheduler.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "descheduler.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "descheduler.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Common labels
+*/}}
+{{- define "descheduler.labels" -}}
+app.kubernetes.io/name: {{ include "descheduler.name" . }}
+helm.sh/chart: {{ include "descheduler.chart" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end -}}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "descheduler.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create -}}
+    {{ default (include "descheduler.fullname" .) .Values.serviceAccount.name }}
+{{- else -}}
+    {{ default "default" .Values.serviceAccount.name }}
+{{- end -}}
+{{- end -}}

charts/descheduler/templates/clusterrole.yaml

@@ -0,0 +1,21 @@
+{{- if .Values.rbac.create -}}
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: {{ template "descheduler.fullname" . }}
+  labels:
+    {{- include "descheduler.labels" . | nindent 4 }}
+rules:
+- apiGroups: [""]
+  resources: ["events"]
+  verbs: ["create", "update"]
+- apiGroups: [""]
+  resources: ["nodes"]
+  verbs: ["get", "watch", "list"]
+- apiGroups: [""]
+  resources: ["pods"]
+  verbs: ["get", "watch", "list", "delete"]
+- apiGroups: [""]
+  resources: ["pods/eviction"]
+  verbs: ["create"]
+{{- end -}}

charts/descheduler/templates/clusterrolebinding.yaml

@@ -0,0 +1,16 @@
+{{- if .Values.rbac.create -}}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ template "descheduler.fullname" . }}
+  labels:
+    {{- include "descheduler.labels" . | nindent 4 }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ template "descheduler.fullname" . }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ template "descheduler.serviceAccountName" . }}
+    namespace: {{ .Release.Namespace }}
+{{- end -}}

charts/descheduler/templates/configmap.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "descheduler.fullname" . }}
+  labels:
+    {{- include "descheduler.labels" . | nindent 4 }}
+data:
+  policy.yaml: |
+    apiVersion: "descheduler/v1alpha1"
+    kind: "DeschedulerPolicy"
+{{ toYaml .Values.deschedulerPolicy | trim | indent 4 }}

charts/descheduler/templates/cronjob.yaml

@@ -0,0 +1,53 @@
+apiVersion: batch/v1beta1
+kind: CronJob
+metadata:
+  name: {{ template "descheduler.fullname" . }}
+  labels:
+    {{- include "descheduler.labels" . | nindent 4 }}
+spec:
+  schedule: {{ .Values.schedule | quote }}
+  concurrencyPolicy: "Forbid"
+  jobTemplate:
+    spec:
+      template:
+        metadata:
+          name: {{ template "descheduler.fullname" . }}
+          annotations:
+            checksum/config: {{ include (print $.Template.BasePath "/configmap.yaml") . | sha256sum }}
+            {{- if .Values.podAnnotations }}
+            {{- .Values.podAnnotations | toYaml | nindent 12 }}
+            {{- end }}
+          labels:
+            app.kubernetes.io/name: {{ include "descheduler.name" . }}
+            app.kubernetes.io/instance: {{ .Release.Name }}
+            {{- if .Values.podLabels }}
+            {{- .Values.podLabels | toYaml | nindent 12 }}
+            {{- end }}
+        spec:
+          {{- if .Values.priorityClassName }}
+          priorityClassName: {{ .Values.priorityClassName }}
+          {{- end }}
+          serviceAccountName: {{ template "descheduler.serviceAccountName" . }}
+          restartPolicy: "Never"
+          containers:
+            - name: {{ .Chart.Name }}
+              image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default (printf "v%s" .Chart.AppVersion) }}"
+              imagePullPolicy: {{ .Values.image.pullPolicy }}
+              command:
+                - "/bin/descheduler"
+              args:
+                - "--policy-config-file"
+                - "/policy-dir/policy.yaml"
+                {{- range $key, $value := .Values.cmdOptions }}
+                - {{ printf "--%s" $key | quote }}
+                {{- if $value }}
+                - {{ $value | quote }}
+                {{- end }}
+                {{- end }}
+              volumeMounts:
+                - mountPath: /policy-dir
+                  name: policy-volume
+          volumes:
+          - name: policy-volume
+            configMap:
+              name: {{ template "descheduler.fullname" . }}

charts/descheduler/templates/serviceaccount.yaml

@@ -0,0 +1,8 @@
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ template "descheduler.serviceAccountName" . }}
+  labels:
+    {{- include "descheduler.labels" . | nindent 4 }}
+{{- end -}}

charts/descheduler/values.yaml

@@ -0,0 +1,59 @@
+# Default values for descheduler.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+image:
+  repository: us.gcr.io/k8s-artifacts-prod/descheduler/descheduler
+  # Overrides the image tag whose default is the chart version
+  tag: ""
+  pullPolicy: IfNotPresent
+
+nameOverride: ""
+fullnameOverride: ""
+
+schedule: "*/2 * * * *"
+
+cmdOptions:
+  v: 3
+  # evict-local-storage-pods:
+  # max-pods-to-evict-per-node: 10
+  # node-selector: "key1=value1,key2=value2"
+
+deschedulerPolicy:
+  strategies:
+    RemoveDuplicates:
+      enabled: true
+    RemovePodsViolatingNodeTaints:
+      enabled: true
+    RemovePodsViolatingNodeAffinity:
+      enabled: true
+      params:
+         nodeAffinityType:
+         - requiredDuringSchedulingIgnoredDuringExecution
+    RemovePodsViolatingInterPodAntiAffinity:
+      enabled: true
+    LowNodeUtilization:
+      enabled: true
+      params:
+        nodeResourceUtilizationThresholds:
+          thresholds:
+            cpu: 20
+            memory: 20
+            pods: 20
+          targetThresholds:
+            cpu: 50
+            memory: 50
+            pods: 50
+
+priorityClassName: system-cluster-critical
+
+rbac:
+  # Specifies whether RBAC resources should be created
+  create: true
+
+serviceAccount:
+  # Specifies whether a ServiceAccount should be created
+  create: true
+  # The name of the ServiceAccount to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name:

cloudbuild.yaml

@@ -0,0 +1,24 @@
+# See https://cloud.google.com/cloud-build/docs/build-config
+
+# this must be specified in seconds. If omitted, defaults to 600s (10 mins)
+timeout: 1200s
+# this prevents errors if you don't use both _GIT_TAG and _PULL_BASE_REF,
+# or any new substitutions added in the future.
+options:
+  substitution_option: ALLOW_LOOSE
+steps:
+  - name: 'gcr.io/k8s-testimages/gcb-docker-gcloud:v20190906-745fed4'
+    entrypoint: make
+    env:
+    - DOCKER_CLI_EXPERIMENTAL=enabled
+    - VERSION=$_GIT_TAG
+    - BASE_REF=$_PULL_BASE_REF
+    args:
+    - push
+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
+  _GIT_TAG: '12345'
+  # _PULL_BASE_REF will contain the ref that was pushed to to trigger this build -
+  # a branch like 'master' or 'release-0.2', or a tag like 'v0.2'.
+  _PULL_BASE_REF: 'master'

cmd/descheduler/app/options/options.go

@@ -21,10 +21,9 @@ import (
 	clientset "k8s.io/client-go/kubernetes"
 
 	// install the componentconfig api so we get its defaulting and conversion functions
-	"github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig"
-	_ "github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig/install"
-	"github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig/v1alpha1"
-	deschedulerscheme "github.com/kubernetes-incubator/descheduler/pkg/descheduler/scheme"
+	"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"
 )
@@ -49,7 +48,7 @@ func NewDeschedulerServer() *DeschedulerServer {
 
 // AddFlags adds flags for a specific SchedulerServer to the specified FlagSet
 func (rs *DeschedulerServer) AddFlags(fs *pflag.FlagSet) {
-	fs.DurationVar(&rs.DeschedulingInterval, "descheduling-interval", rs.DeschedulingInterval, "time interval between two consecutive descheduler executions")
+	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.")
@@ -57,4 +56,6 @@ func (rs *DeschedulerServer) AddFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&rs.NodeSelector, "node-selector", rs.NodeSelector, "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")
+	// 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")
 }

cmd/descheduler/app/server.go

@@ -21,14 +21,14 @@ import (
 	"flag"
 	"io"
 
-	"github.com/kubernetes-incubator/descheduler/cmd/descheduler/app/options"
-	"github.com/kubernetes-incubator/descheduler/pkg/descheduler"
+	"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
+	"sigs.k8s.io/descheduler/pkg/descheduler"
 
-	"github.com/golang/glog"
 	"github.com/spf13/cobra"
 
-	aflag "k8s.io/apiserver/pkg/util/flag"
-	"k8s.io/apiserver/pkg/util/logs"
+	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
@@ -43,7 +43,7 @@ func NewDeschedulerCommand(out io.Writer) *cobra.Command {
 			defer logs.FlushLogs()
 			err := Run(s)
 			if err != nil {
-				glog.Errorf("%v", err)
+				klog.Errorf("%v", err)
 			}
 		},
 	}

cmd/descheduler/app/version.go

@@ -18,9 +18,10 @@ package app
 
 import (
 	"fmt"
-	"github.com/spf13/cobra"
 	"runtime"
 	"strings"
+
+	"github.com/spf13/cobra"
 )
 
 var (

cmd/descheduler/descheduler.go

@@ -21,7 +21,7 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/kubernetes-incubator/descheduler/cmd/descheduler/app"
+	"sigs.k8s.io/descheduler/cmd/descheduler/app"
 )
 
 func main() {

docs/README.md

@@ -0,0 +1,5 @@
+# Documentation Index
+
+- [Contributor Guide](contributor-guide.md)
+- [Release Guide](release-guide.md)
+- [User Guide](user-guide.md)

docs/contributor-guide.md

@@ -0,0 +1,42 @@
+# Contributor Guide
+
+## Required Tools
+
+- [Git](https://git-scm.com/downloads)
+- [Go 1.14+](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/)
+
+## Build and Run
+
+Build descheduler.
+```sh
+cd $GOPATH/src/sigs.k8s.io
+git clone https://github.com/kubernetes-sigs/descheduler.git
+cd descheduler
+make
+```
+
+Run descheduler.
+```sh
+./_output/bin/descheduler --kubeconfig <path to kubeconfig> --policy-config-file <path-to-policy-file> --v 1
+```
+
+View all CLI options.
+```
+./_output/bin/descheduler --help
+```
+
+## Run Tests
+```
+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
+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.

docs/release-guide.md

@@ -0,0 +1,69 @@
+# Release Guide
+
+## Container Image
+
+### Semi-automatic
+
+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`
+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
+8. Email `kubernetes-sig-scheduling@googlegroups.com` to announce the release
+
+### Manual
+
+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`
+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`
+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
+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
+or use the below `gcloud` commands.
+
+List images in staging registry.
+```
+gcloud container images list --repository gcr.io/k8s-staging-descheduler
+```
+
+List descheduler image tags in the staging registry.
+```
+gcloud container images list-tags gcr.io/k8s-staging-descheduler/descheduler
+```
+
+Get SHA256 hash for a specific image in the staging registry.
+```
+gcloud container images describe gcr.io/k8s-staging-descheduler/descheduler:v20200206-0.9.0-94-ge2a23f284
+```
+
+Pull image from the staging registry.
+```
+docker pull gcr.io/k8s-staging-descheduler/descheduler:v20200206-0.9.0-94-ge2a23f284
+```
+
+## 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 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
+build and push the helm charts to the `gh-pages` branch when a `chart-*` git tag is created.
+
+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
+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. 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`
+4. Verify the new helm artifact has been successfully pushed to the `gh-pages` branch

docs/user-guide.md

@@ -0,0 +1,90 @@
+# User Guide
+
+Starting with descheduler release v0.10.0 container images are available in these container registries.
+* `asia.gcr.io/k8s-artifacts-prod/descheduler/descheduler`
+* `eu.gcr.io/k8s-artifacts-prod/descheduler/descheduler`
+* `us.gcr.io/k8s-artifacts-prod/descheduler/descheduler`
+
+## Policy Configuration Examples
+The [examples](https://github.com/kubernetes-sigs/descheduler/tree/master/examples) directory has descheduler policy configuration examples.
+
+## CLI Options
+The descheduler has many CLI options that can be used to override its default behavior.
+```
+descheduler --help
+The descheduler evicts pods which may be bound to less desired nodes
+
+Usage:
+  descheduler [flags]
+  descheduler [command]
+
+Available Commands:
+  help        Help about any command
+  version     Version of descheduler
+
+Flags:
+      --add-dir-header                   If true, adds the file directory to the header
+      --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
+  -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)
+      --log-dir string                   If non-empty, write log files in this directory
+      --log-file string                  If non-empty, use this log file
+      --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
+      --node-selector string             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
+      --stderrthreshold severity         logs at or above this threshold go to stderr (default 2)
+  -v, --v Level                          number for the log level verbosity
+      --vmodule moduleSpec               comma-separated list of pattern=N settings for file-filtered logging
+
+Use "descheduler [command] --help" for more information about a command.
+```
+
+## Production Use Cases
+This section contains descriptions of real world production use cases.
+
+### Balance Cluster By Pod Age
+When initially migrating applications from a static virtual machine infrastructure to a cloud native k8s
+infrastructure there can be a tendency to treat application pods like static virtual machines. One approach
+to help prevent developers and operators from treating pods like virtual machines is to ensure that pods
+only run for a fixed amount
+of time.
+
+The `PodLifeTime` strategy can be used to ensure that old pods are evicted. It is recommended to create a
+[pod disruption budget](https://kubernetes.io/docs/tasks/run-application/configure-pdb/) for each
+application to ensure application availability.
+```
+descheduler -v=3 --evict-local-storage-pods --policy-config-file=pod-life-time.yml
+```
+
+This policy configuration file ensures that pods created more than 7 days ago are evicted.
+```
+---
+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
+```

examples/pod-life-time.yml

@@ -0,0 +1,20 @@
+---
+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

examples/policy.yaml

@@ -17,3 +17,9 @@ strategies:
            "cpu" : 50
            "memory": 50
            "pods": 50
+  "RemovePodsHavingTooManyRestarts":
+     enabled: true
+     params:
+       podsHavingTooManyRestarts:
+         podRestartThreshold: 100
+         includingInitContainers: true

glide.lock

@@ -1,464 +0,0 @@
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-  - kubernetes/typed/batch/v1
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-  - kubernetes/typed/batch/v1beta1
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-  - kubernetes/typed/batch/v2alpha1
-  - kubernetes/typed/batch/v2alpha1/fake
-  - kubernetes/typed/certificates/v1beta1
-  - kubernetes/typed/certificates/v1beta1/fake
-  - kubernetes/typed/core/v1
-  - kubernetes/typed/core/v1/fake
-  - kubernetes/typed/events/v1beta1
-  - kubernetes/typed/events/v1beta1/fake
-  - kubernetes/typed/extensions/v1beta1
-  - kubernetes/typed/extensions/v1beta1/fake
-  - kubernetes/typed/networking/v1
-  - kubernetes/typed/networking/v1/fake
-  - kubernetes/typed/policy/v1beta1
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-  - kubernetes/typed/rbac/v1
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-  - kubernetes/typed/rbac/v1alpha1
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-  - kubernetes/typed/rbac/v1beta1
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-  - kubernetes/typed/settings/v1alpha1
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-  - kubernetes/typed/storage/v1
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-  - kubernetes/typed/storage/v1beta1
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-  - listers/core/v1
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-  - plugin/pkg/client/auth
-  - plugin/pkg/client/auth/azure
-  - plugin/pkg/client/auth/gcp
-  - plugin/pkg/client/auth/oidc
-  - plugin/pkg/client/auth/openstack
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-  - rest/watch
-  - testing
-  - third_party/forked/golang/template
-  - tools/auth
-  - tools/cache
-  - tools/clientcmd
-  - tools/clientcmd/api
-  - tools/clientcmd/api/latest
-  - tools/clientcmd/api/v1
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-  - tools/pager
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-  - transport
-  - util/buffer
-  - util/cert
-  - util/flowcontrol
-  - util/homedir
-  - util/integer
-  - util/jsonpath
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-  - pkg/apis/admission
-  - pkg/apis/admission/install
-  - pkg/apis/admission/v1beta1
-  - pkg/apis/admissionregistration
-  - pkg/apis/admissionregistration/install
-  - pkg/apis/admissionregistration/v1alpha1
-  - pkg/apis/admissionregistration/v1beta1
-  - pkg/apis/apps
-  - pkg/apis/apps/install
-  - pkg/apis/apps/v1
-  - pkg/apis/apps/v1beta1
-  - pkg/apis/apps/v1beta2
-  - pkg/apis/authentication
-  - pkg/apis/authentication/install
-  - pkg/apis/authentication/v1
-  - pkg/apis/authentication/v1beta1
-  - pkg/apis/authorization
-  - pkg/apis/authorization/install
-  - pkg/apis/authorization/v1
-  - pkg/apis/authorization/v1beta1
-  - pkg/apis/autoscaling
-  - pkg/apis/autoscaling/install
-  - pkg/apis/autoscaling/v1
-  - pkg/apis/autoscaling/v2beta1
-  - pkg/apis/batch
-  - pkg/apis/batch/install
-  - pkg/apis/batch/v1
-  - pkg/apis/batch/v1beta1
-  - pkg/apis/batch/v2alpha1
-  - pkg/apis/certificates
-  - pkg/apis/certificates/install
-  - pkg/apis/certificates/v1beta1
-  - pkg/apis/componentconfig
-  - pkg/apis/componentconfig/install
-  - pkg/apis/componentconfig/v1alpha1
-  - pkg/apis/core
-  - pkg/apis/core/helper
-  - pkg/apis/core/install
-  - pkg/apis/core/v1
-  - pkg/apis/core/v1/helper
-  - pkg/apis/core/v1/helper/qos
-  - pkg/apis/events
-  - pkg/apis/events/install
-  - pkg/apis/events/v1beta1
-  - pkg/apis/extensions
-  - pkg/apis/extensions/install
-  - pkg/apis/extensions/v1beta1
-  - pkg/apis/imagepolicy
-  - pkg/apis/imagepolicy/install
-  - pkg/apis/imagepolicy/v1alpha1
-  - pkg/apis/networking
-  - pkg/apis/networking/install
-  - pkg/apis/networking/v1
-  - pkg/apis/policy
-  - pkg/apis/policy/install
-  - pkg/apis/policy/v1beta1
-  - pkg/apis/rbac
-  - pkg/apis/rbac/install
-  - pkg/apis/rbac/v1
-  - pkg/apis/rbac/v1alpha1
-  - pkg/apis/rbac/v1beta1
-  - pkg/apis/scheduling
-  - pkg/apis/scheduling/install
-  - pkg/apis/scheduling/v1alpha1
-  - pkg/apis/settings
-  - pkg/apis/settings/install
-  - pkg/apis/settings/v1alpha1
-  - pkg/apis/storage
-  - pkg/apis/storage/install
-  - pkg/apis/storage/v1
-  - pkg/apis/storage/v1alpha1
-  - pkg/apis/storage/v1beta1
-  - pkg/features
-  - pkg/kubelet/apis
-  - pkg/kubelet/types
-  - pkg/master/ports
-  - pkg/util/parsers
-  - pkg/util/pointer
-  - plugin/pkg/scheduler/algorithm/priorities/util
-testImports: []

glide.yaml

@@ -1,25 +0,0 @@
-package: github.com/kubernetes-incubator/descheduler
-import:
-- package: k8s.io/client-go
-  version: 78700dec6369ba22221b72770783300f143df150
-- package: k8s.io/api
-  version: af4bc157c3a209798fc897f6d4aaaaeb6c2e0d6a
-- package: k8s.io/apiserver
-  version: 91e14f394e4796abf5a994a349a222e7081d86b6
-- package: k8s.io/apimachinery
-  version: 180eddb345a5be3a157cea1c624700ad5bd27b8f
-- package: k8s.io/kubernetes
-  version: v1.9.0
-- package: k8s.io/code-generator
-  version: kubernetes-1.9.0
-- package: github.com/kubernetes/repo-infra
-- package: github.com/spf13/cobra
-  version: f62e98d28ab7ad31d707ba837a966378465c7b57
-- package: k8s.io/gengo
-- package: github.com/ugorji/go
-  version: v.1.1-beta
-- package: github.com/Azure/go-autorest
-  version: e14a70c556c8e0db173358d1a903dca345a8e75e
-- package: golang.org/x/tools
-  subpackages:
-  - imports

go.mod

@@ -0,0 +1,15 @@
+module sigs.k8s.io/descheduler
+
+go 1.14
+
+require (
+	github.com/spf13/cobra v0.0.5
+	github.com/spf13/pflag v1.0.5
+	k8s.io/api v0.18.4
+	k8s.io/apimachinery v0.18.4
+	k8s.io/apiserver v0.18.4
+	k8s.io/client-go v0.18.4
+	k8s.io/code-generator v0.18.4
+	k8s.io/component-base v0.18.4
+	k8s.io/klog/v2 v2.0.0
+)

go.sum

@@ -0,0 +1,381 @@
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+k8s.io/api v0.18.4 h1:8x49nBRxuXGUlDlwlWd3RMY1SayZrzFfxea3UZSkFw4=
+k8s.io/api v0.18.4/go.mod h1:lOIQAKYgai1+vz9J7YcDZwC26Z0zQewYOGWdyIPUUQ4=
+k8s.io/apimachinery v0.18.4 h1:ST2beySjhqwJoIFk6p7Hp5v5O0hYY6Gngq/gUYXTPIA=
+k8s.io/apimachinery v0.18.4/go.mod h1:OaXp26zu/5J7p0f92ASynJa1pZo06YlV9fG7BoWbCko=
+k8s.io/apiserver v0.18.4 h1:pn1jSQkfboPSirZopkVpEdLW4FcQLnYMaIY8LFxxj30=
+k8s.io/apiserver v0.18.4/go.mod h1:q+zoFct5ABNnYkGIaGQ3bcbUNdmPyOCoEBcg51LChY8=
+k8s.io/client-go v0.18.4 h1:un55V1Q/B3JO3A76eS0kUSywgGK/WR3BQ8fHQjNa6Zc=
+k8s.io/client-go v0.18.4/go.mod h1:f5sXwL4yAZRkAtzOxRWUhA/N8XzGCb+nPZI8PfobZ9g=
+k8s.io/code-generator v0.18.4 h1:SouAMfh3jbL7aL8rnUQ/C+7WwXYTZnPa8L9V2TtIE7o=
+k8s.io/code-generator v0.18.4/go.mod h1:TgNEVx9hCyPGpdtCWA34olQYLkh3ok9ar7XfSsr8b6c=
+k8s.io/component-base v0.18.4 h1:Kr53Fp1iCGNsl9Uv4VcRvLy7YyIqi9oaJOQ7SXtKI98=
+k8s.io/component-base v0.18.4/go.mod h1:7jr/Ef5PGmKwQhyAz/pjByxJbC58mhKAhiaDu0vXfPk=
+k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20200114144118-36b2048a9120 h1:RPscN6KhmG54S33L+lr3GS+oD1jmchIU0ll519K6FA4=
+k8s.io/gengo v0.0.0-20200114144118-36b2048a9120/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
+k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
+k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
+k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
+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/kube-openapi v0.0.0-20200410145947-61e04a5be9a6/go.mod h1:GRQhZsXIAJ1xR0C9bd8UpWHZ5plfAS9fzPjJuQ6JL3E=
+k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89 h1:d4vVOjXm687F1iLSP2q3lyPPuyvTUt3aVoBpi2DqRsU=
+k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.7/go.mod h1:PHgbrJT7lCHcxMU+mDHEm+nx46H4zuuHZkDP6icnhu0=
+sigs.k8s.io/structured-merge-diff/v3 v3.0.0-20200116222232-67a7b8c61874/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
+sigs.k8s.io/structured-merge-diff/v3 v3.0.0 h1:dOmIZBMfhcHS09XZkMyUgkq5trg3/jRyJYFZUiaOp8E=
+sigs.k8s.io/structured-merge-diff/v3 v3.0.0/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
+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/e2e-gce/gcloud_create_cluster.sh

@@ -10,7 +10,7 @@ master_uuid=$(uuid)
 node1_uuid=$(uuid)
 node2_uuid=$(uuid)
 kube_apiserver_port=6443
-kube_version=1.9.4
+kube_version=1.13.1
 
 DESCHEDULER_ROOT=$(dirname "${BASH_SOURCE}")/../../
 E2E_GCE_HOME=$DESCHEDULER_ROOT/hack/e2e-gce
@@ -36,10 +36,10 @@ create_cluster() {
 
 generate_kubeadm_instance_files() {
 	# TODO: Check if they have come up. awk $6 contains the state(RUNNING or not).
-	master_public_ip=$(gcloud compute instances list | grep $master_uuid|awk '{print $5}')
+	master_private_ip=$(gcloud compute instances list | grep $master_uuid|awk '{print $4}')
 	node1_public_ip=$(gcloud compute instances list | grep $node1_uuid|awk '{print $5}')
 	node2_public_ip=$(gcloud compute instances list | grep $node2_uuid|awk '{print $5}')
-	echo "kubeadm init --kubernetes-version=${kube_version} --apiserver-advertise-address=${master_public_ip}" --skip-preflight-checks --pod-network-cidr=10.96.0.0/12 > $E2E_GCE_HOME/kubeadm_install.sh
+	echo "kubeadm init --kubernetes-version=${kube_version} --apiserver-advertise-address=${master_private_ip}" --ignore-preflight-errors=all --pod-network-cidr=10.96.0.0/12 > $E2E_GCE_HOME/kubeadm_install.sh
 }
 
 

hack/kind_config.yaml

@@ -0,0 +1,6 @@
+kind: Cluster
+apiVersion: kind.sigs.k8s.io/v1alpha3
+nodes:
+- role: control-plane
+- role: worker
+- role: worker

hack/lib/init.sh

@@ -43,5 +43,5 @@ OS_ROOT="$( os::util::absolute_path "${init_source}" )"
 export OS_ROOT
 cd "${OS_ROOT}"
 
-PRJ_PREFIX="github.com/${REPO_ORG:-kubernetes-incubator}/descheduler"
+PRJ_PREFIX="sigs.k8s.io/descheduler"
 OS_OUTPUT_BINPATH="${OS_ROOT}/_output/bin"

hack/tools.go

@@ -0,0 +1,22 @@
+// +build tools
+
+/*
+Copyright 2019 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 package imports things required by build scripts, to force `go mod` to see them as dependencies
+package tools
+
+import _ "k8s.io/code-generator"

hack/update-codecgen.sh

@@ -1,151 +0,0 @@
-#!/bin/bash
-
-# Copyright 2015 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.
-
-set -o errexit
-set -o nounset
-set -o pipefail
-
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
-
-# The sort at the end makes sure we feed the topological sort a deterministic
-# list (since there aren't many dependencies).
-
-generated_files=($(
-  find . -not \( \
-      \( \
-        -wholename './output' \
-        -o -wholename './_output' \
-        -o -wholename './staging' \
-        -o -wholename './release' \
-        -o -wholename './target' \
-        -o -wholename '*/third_party/*' \
-        -o -wholename '*/vendor/*' \
-        -o -wholename '*/codecgen-*-1234.generated.go' \
-      \) -prune \
-    \) -name '*.generated.go' | LC_ALL=C sort -r
-))
-
-# We only work for deps within this prefix.
-#my_prefix="k8s.io/kubernetes"
-my_prefix="github.com/${REPO_ORG:-kubernetes-incubator}/descheduler"
-
-# Register function to be called on EXIT to remove codecgen
-# binary and also to touch the files that should be regenerated
-# since they are first removed.
-# This is necessary to make the script work after previous failure.
-function cleanup {
-  rm -f "${CODECGEN:-}"
-  pushd "${KUBE_ROOT}" > /dev/null
-  for (( i=0; i < number; i++ )); do
-    touch "${generated_files[${i}]}" || true
-  done
-  popd > /dev/null
-}
-trap cleanup EXIT
-
-# Precompute dependencies for all directories.
-# Then sort all files in the dependency order.
-number=${#generated_files[@]}
-result=""
-for (( i=0; i<number; i++ )); do
-  visited[${i}]=false
-  file="${generated_files[${i}]/\.generated\.go/.go}"
-  deps[${i}]=$(go list -f '{{range .Deps}}{{.}}{{"\n"}}{{end}}' ${file} | grep "^${my_prefix}")
-done
-###echo "DBG: found $number generated files"
-###for f in $(echo "${generated_files[@]}" | LC_ALL=C sort); do
-###    echo "DBG:   $f"
-###done
-
-# NOTE: depends function assumes that the whole repository is under
-# $my_prefix - it will NOT work if that is not true.
-function depends {
-  rhs="$(dirname ${generated_files[$2]/#./${my_prefix}})"
-  ###echo "DBG: does ${file} depend on ${rhs}?"
-  for dep in ${deps[$1]}; do
-    ###echo "DBG:   checking against $dep"
-    if [[ "${dep}" == "${rhs}" ]]; then
-      ###echo "DBG: = yes"
-      return 0
-    fi
-  done
-  ###echo "DBG: = no"
-  return 1
-}
-
-function tsort {
-  visited[$1]=true
-  local j=0
-  for (( j=0; j<number; j++ )); do
-    if ! ${visited[${j}]}; then
-      if depends "$1" ${j}; then
-        tsort $j
-      fi
-    fi
-  done
-  result="${result} $1"
-}
-echo "Building dependencies"
-for (( i=0; i<number; i++ )); do
-  ###echo "DBG: considering ${generated_files[${i}]}"
-  if ! ${visited[${i}]}; then
-    ###echo "DBG: tsorting ${generated_files[${i}]}"
-    tsort ${i}
-  fi
-done
-index=(${result})
-
-haveindex=${index:-}
-if [[ -z ${haveindex} ]]; then
-  echo No files found for $0
-  echo A previous run of $0 may have deleted all the files and then crashed.
-  echo Use 'touch' to create files named 'types.generated.go' listed as deleted in 'git status'
-  exit 1
-fi
-
-echo "Building codecgen"
-CODECGEN="${PWD}/codecgen_binary"
-go build -o "${CODECGEN}" ./vendor/github.com/ugorji/go/codec/codecgen
-
-# Running codecgen fails if some of the files doesn't compile.
-# Thus (since all the files are completely auto-generated and
-# not required for the code to be compilable, we first remove
-# them and the regenerate them.
-for (( i=0; i < number; i++ )); do
-  rm -f "${generated_files[${i}]}"
-done
-
-# Generate files in the dependency order.
-for current in "${index[@]}"; do
-  generated_file=${generated_files[${current}]}
-  initial_dir=${PWD}
-  file=${generated_file/\.generated\.go/.go}
-  echo "processing ${file}"
-  # codecgen work only if invoked from directory where the file
-  # is located.
-  pushd "$(dirname ${file})" > /dev/null
-  base_file=$(basename "${file}")
-  base_generated_file=$(basename "${generated_file}")
-  # We use '-d 1234' flag to have a deterministic output every time.
-  # The constant was just randomly chosen.
-  ###echo "DBG: running ${CODECGEN} -d 1234 -o ${base_generated_file} ${base_file}"
-  ${CODECGEN} -d 1234 -o "${base_generated_file}" "${base_file}"
-  # Add boilerplate at the beginning of the generated file.
-  sed 's/YEAR/2017/' "${initial_dir}/hack/boilerplate/boilerplate.go.txt" > "${base_generated_file}.tmp"
-  cat "${base_generated_file}" >> "${base_generated_file}.tmp"
-  mv "${base_generated_file}.tmp" "${base_generated_file}"
-  popd > /dev/null
-done

hack/update-generated-conversions.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 source "$(dirname "${BASH_SOURCE}")/lib/init.sh"
 
-go build -o "${OS_OUTPUT_BINPATH}/conversion-gen" "${PRJ_PREFIX}/vendor/k8s.io/code-generator/cmd/conversion-gen"
+go build -o "${OS_OUTPUT_BINPATH}/conversion-gen" "k8s.io/code-generator/cmd/conversion-gen"
 
 ${OS_OUTPUT_BINPATH}/conversion-gen \
 		--go-header-file "hack/boilerplate/boilerplate.go.txt" \

hack/update-generated-deep-copies.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 source "$(dirname "${BASH_SOURCE}")/lib/init.sh"
 
-go build -o "${OS_OUTPUT_BINPATH}/deepcopy-gen" "${PRJ_PREFIX}/vendor/k8s.io/code-generator/cmd/deepcopy-gen"
+go build -o "${OS_OUTPUT_BINPATH}/deepcopy-gen" "k8s.io/code-generator/cmd/deepcopy-gen"
 
 ${OS_OUTPUT_BINPATH}/deepcopy-gen \
                 --go-header-file "hack/boilerplate/boilerplate.go.txt" \

hack/update-generated-defaulters.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 source "$(dirname "${BASH_SOURCE}")/lib/init.sh"
 
-go build -o "${OS_OUTPUT_BINPATH}/defaulter-gen" "${PRJ_PREFIX}/vendor/k8s.io/code-generator/cmd/defaulter-gen"
+go build -o "${OS_OUTPUT_BINPATH}/defaulter-gen" "k8s.io/code-generator/cmd/defaulter-gen"
 
 ${OS_OUTPUT_BINPATH}/defaulter-gen \
                 --go-header-file "hack/boilerplate/boilerplate.go.txt" \

hack/update-gofmt.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+# Copyright 2017 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.
+
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+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
+  echo "Unknown go version '${GO_VERSION[2]}', skipping gofmt."
+  exit 1
+fi
+
+cd "${DESCHEDULER_ROOT}"
+
+find_files() {
+  find . -not \( \
+      \( \
+        -wholename './output' \
+        -o -wholename './_output' \
+        -o -wholename './release' \
+        -o -wholename './target' \
+        -o -wholename './.git' \
+        -o -wholename '*/third_party/*' \
+        -o -wholename '*/Godeps/*' \
+        -o -wholename '*/vendor/*' \
+      \) -prune \
+    \) -name '*.go'
+}
+
+GOFMT="gofmt -s -w"
+find_files | xargs $GOFMT -l

hack/update-vendor.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# 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.
+
+
+source "$(dirname "${BASH_SOURCE}")/lib/init.sh"
+
+go mod tidy
+go mod vendor

hack/verify-gofmt.sh

@@ -23,8 +23,8 @@ 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') ]]; then
-  echo "Unknown go version '${GO_VERSION}', skipping gofmt."
+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
+  echo "Unknown go version '${GO_VERSION[2]}', skipping gofmt."
   exit 1
 fi
 
@@ -45,7 +45,7 @@ find_files() {
     \) -name '*.go'
 }
 
-GOFMT="gofmt -s" 
+GOFMT="gofmt -s"
 bad_files=$(find_files | xargs $GOFMT -l)
 if [[ -n "${bad_files}" ]]; then
   echo "!!! '$GOFMT' needs to be run on the following files: "

hack/verify-vendor.sh

@@ -0,0 +1,88 @@
+#!/bin/bash
+
+# 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.
+
+# This is mostly copied from the hack/verify-vendor.sh script located in k8s.io/kubernetes
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+source "$(dirname "${BASH_SOURCE}")/lib/init.sh"
+
+DESCHEDULER_ROOT=$(dirname "${BASH_SOURCE}")/..
+
+mkdir -p "${DESCHEDULER_ROOT}/_tmp"
+_tmpdir="$(mktemp -d "${DESCHEDULER_ROOT}/_tmp/kube-vendor.XXXXXX")"
+
+if [[ -z ${KEEP_TMP:-} ]]; then
+    KEEP_TMP=false
+fi
+
+function cleanup {
+  # make go module dirs writeable
+  chmod -R +w "${_tmpdir}"
+  if [ "${KEEP_TMP}" == "true" ]; then
+    echo "Leaving ${_tmpdir} for you to examine or copy. Please delete it manually when finished. (rm -rf ${_tmpdir})"
+  else
+    echo "Removing ${_tmpdir}"
+    rm -rf "${_tmpdir}"
+  fi
+}
+trap "cleanup" EXIT
+
+_deschedulertmp="${_tmpdir}"
+mkdir -p "${_deschedulertmp}"
+
+git archive --format=tar --prefix=descheduler/ "$(git write-tree)" | (cd "${_deschedulertmp}" && tar xf -)
+_deschedulertmp="${_deschedulertmp}/descheduler"
+
+pushd "${_deschedulertmp}" > /dev/null 2>&1
+  # Destroy deps in the copy of the kube tree
+  rm -rf ./vendor
+
+  # Recreate the vendor tree using the nice clean set we just downloaded
+  hack/update-vendor.sh
+popd > /dev/null 2>&1
+
+ret=0
+
+pushd "${DESCHEDULER_ROOT}" > /dev/null 2>&1
+  # Test for diffs
+  if ! _out="$(diff -Naupr --ignore-matching-lines='^\s*\"GoVersion\":' go.mod "${_deschedulertmp}/go.mod")"; then
+    echo "Your go.mod file is different:" >&2
+    echo "${_out}" >&2
+    echo "Vendor Verify failed." >&2
+    echo "If you're seeing this locally, run the below command to fix your go.mod:" >&2
+    echo "hack/update-vendor.sh" >&2
+    ret=1
+  fi
+
+  if ! _out="$(diff -Naupr -x "BUILD" -x "AUTHORS*" -x "CONTRIBUTORS*" vendor "${_deschedulertmp}/vendor")"; then
+    echo "Your vendored results are different:" >&2
+    echo "${_out}" >&2
+    echo "Vendor Verify failed." >&2
+    echo "${_out}" > vendordiff.patch
+    echo "If you're seeing this locally, run the below command to fix your directories:" >&2
+    echo "hack/update-vendor.sh" >&2
+    ret=1
+  fi
+popd > /dev/null 2>&1
+
+if [[ ${ret} -gt 0 ]]; then
+  exit ${ret}
+fi
+
+echo "Vendor Verified."

kubernetes/configmap.yaml

@@ -0,0 +1,28 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: descheduler-policy-configmap
+  namespace: kube-system
+data:
+  policy.yaml: |
+    apiVersion: "descheduler/v1alpha1"
+    kind: "DeschedulerPolicy"
+    strategies:
+      "RemoveDuplicates":
+         enabled: true
+      "RemovePodsViolatingInterPodAntiAffinity":
+         enabled: true
+      "LowNodeUtilization":
+         enabled: true
+         params:
+           nodeResourceUtilizationThresholds:
+             thresholds:
+               "cpu" : 20
+               "memory": 20
+               "pods": 20
+             targetThresholds:
+               "cpu" : 50
+               "memory": 50
+               "pods": 50
+

kubernetes/cronjob.yaml

@@ -0,0 +1,35 @@
+---
+apiVersion: batch/v1beta1
+kind: CronJob
+metadata:
+  name: descheduler-cronjob
+  namespace: kube-system
+spec:
+  schedule: "*/2 * * * *"
+  concurrencyPolicy: "Forbid"
+  jobTemplate:
+    spec:
+      template:
+        metadata:
+          name: descheduler-pod
+        spec:
+          priorityClassName: system-cluster-critical
+          containers:
+          - name: descheduler
+            image: us.gcr.io/k8s-artifacts-prod/descheduler/descheduler:v0.18.0
+            volumeMounts:
+            - mountPath: /policy-dir
+              name: policy-volume
+            command:
+              - "/bin/descheduler"
+            args:
+              - "--policy-config-file"
+              - "/policy-dir/policy.yaml"
+              - "--v"
+              - "3"
+          restartPolicy: "Never"
+          serviceAccountName: descheduler-sa
+          volumes:
+          - name: policy-volume
+            configMap:
+              name: descheduler-policy-configmap

kubernetes/job.yaml

@@ -0,0 +1,33 @@
+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: descheduler-job
+  namespace: kube-system
+spec:
+  parallelism: 1
+  completions: 1
+  template:
+    metadata:
+      name: descheduler-pod
+    spec:
+      priorityClassName: system-cluster-critical
+      containers:
+        - name: descheduler
+          image: us.gcr.io/k8s-artifacts-prod/descheduler/descheduler:v0.18.0
+          volumeMounts:
+          - mountPath: /policy-dir
+            name: policy-volume
+          command:
+            - "/bin/descheduler"
+          args:
+            - "--policy-config-file"
+            - "/policy-dir/policy.yaml"
+            - "--v"
+            - "3"
+      restartPolicy: "Never"
+      serviceAccountName: descheduler-sa
+      volumes:
+      - name: policy-volume
+        configMap:
+          name: descheduler-policy-configmap

kubernetes/rbac.yaml

@@ -0,0 +1,40 @@
+---
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: descheduler-cluster-role
+  namespace: kube-system
+rules:
+- apiGroups: [""]
+  resources: ["events"]
+  verbs: ["create", "update"]
+- apiGroups: [""]
+  resources: ["nodes"]
+  verbs: ["get", "watch", "list"]
+- apiGroups: [""]
+  resources: ["pods"]
+  verbs: ["get", "watch", "list", "delete"]
+- apiGroups: [""]
+  resources: ["pods/eviction"]
+  verbs: ["create"]
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: descheduler-sa
+  namespace: kube-system
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: descheduler-cluster-role-binding
+  namespace: kube-system
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: descheduler-cluster-role
+subjects:
+  - name: descheduler-sa
+    kind: ServiceAccount
+    namespace: kube-system
+

pkg/api/doc.go

@@ -16,4 +16,4 @@ limitations under the License.
 
 // +k8s:deepcopy-gen=package,register
 
-package api // import "github.com/kubernetes-incubator/descheduler/pkg/api"
+package api // import "sigs.k8s.io/descheduler/pkg/api"

pkg/api/install/install.go

@@ -1,48 +0,0 @@
-/*
-Copyright 2017 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 install installs the descheduler's policy API group.
-package install
-
-import (
-	"k8s.io/apimachinery/pkg/apimachinery/announced"
-	"k8s.io/apimachinery/pkg/apimachinery/registered"
-	"k8s.io/apimachinery/pkg/runtime"
-
-	deschedulerapi "github.com/kubernetes-incubator/descheduler/pkg/api"
-	"github.com/kubernetes-incubator/descheduler/pkg/api/v1alpha1"
-	deschedulerscheme "github.com/kubernetes-incubator/descheduler/pkg/descheduler/scheme"
-)
-
-func init() {
-	Install(deschedulerscheme.GroupFactoryRegistry, deschedulerscheme.Registry, deschedulerscheme.Scheme)
-}
-
-// Install registers the API group and adds types to a scheme
-func Install(groupFactoryRegistry announced.APIGroupFactoryRegistry, registry *registered.APIRegistrationManager, scheme *runtime.Scheme) {
-	if err := announced.NewGroupMetaFactory(
-		&announced.GroupMetaFactoryArgs{
-			GroupName:                  deschedulerapi.GroupName,
-			VersionPreferenceOrder:     []string{v1alpha1.SchemeGroupVersion.Version},
-			AddInternalObjectsToScheme: deschedulerapi.AddToScheme,
-		},
-		announced.VersionToSchemeFunc{
-			v1alpha1.SchemeGroupVersion.Version: v1alpha1.AddToScheme,
-		},
-	).Announce(groupFactoryRegistry).RegisterAndEnable(registry, scheme); err != nil {
-		panic(err)
-	}
-}

pkg/api/register.go

@@ -19,11 +19,14 @@ package api
 import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
+
+	"sigs.k8s.io/descheduler/pkg/descheduler/scheme"
 )
 
 var (
 	SchemeBuilder = runtime.NewSchemeBuilder(addKnownTypes)
 	AddToScheme   = SchemeBuilder.AddToScheme
+	Scheme        = runtime.NewScheme()
 )
 
 // GroupName is the group name use in this package
@@ -32,6 +35,12 @@ 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

@@ -17,7 +17,7 @@ limitations under the License.
 package api
 
 import (
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
@@ -41,13 +41,16 @@ type DeschedulerStrategy struct {
 	Weight int
 
 	// Strategy parameters
-	Params StrategyParameters
+	Params *StrategyParameters
 }
 
 // Only one of its members may be specified
 type StrategyParameters struct {
-	NodeResourceUtilizationThresholds NodeResourceUtilizationThresholds
+	NodeResourceUtilizationThresholds *NodeResourceUtilizationThresholds
 	NodeAffinityType                  []string
+	PodsHavingTooManyRestarts         *PodsHavingTooManyRestarts
+	MaxPodLifeTimeSeconds             *uint
+	RemoveDuplicates                  *RemoveDuplicates
 }
 
 type Percentage float64
@@ -58,3 +61,12 @@ type NodeResourceUtilizationThresholds struct {
 	TargetThresholds ResourceThresholds
 	NumberOfNodes    int
 }
+
+type PodsHavingTooManyRestarts struct {
+	PodRestartThreshold     int32
+	IncludingInitContainers bool
+}
+
+type RemoveDuplicates struct {
+	ExcludeOwnerKinds []string
+}

pkg/api/v1alpha1/doc.go

@@ -15,10 +15,10 @@ limitations under the License.
 */
 
 // +k8s:deepcopy-gen=package,register
-// +k8s:conversion-gen=github.com/kubernetes-incubator/descheduler/pkg/api
+// +k8s:conversion-gen=sigs.k8s.io/descheduler/pkg/api
 // +k8s:defaulter-gen=TypeMeta
 
 // Package v1alpha1 is the v1alpha1 version of the descheduler API
 // +groupName=descheduler
 
-package v1alpha1 // import "github.com/kubernetes-incubator/descheduler/pkg/api/v1alpha1"
+package v1alpha1 // import "sigs.k8s.io/descheduler/pkg/api/v1alpha1"

pkg/api/v1alpha1/types.go

@@ -17,7 +17,7 @@ limitations under the License.
 package v1alpha1
 
 import (
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
@@ -41,13 +41,16 @@ type DeschedulerStrategy struct {
 	Weight int `json:"weight,omitempty"`
 
 	// Strategy parameters
-	Params StrategyParameters `json:"params,omitempty"`
+	Params *StrategyParameters `json:"params,omitempty"`
 }
 
 // Only one of its members may be specified
 type StrategyParameters struct {
-	NodeResourceUtilizationThresholds NodeResourceUtilizationThresholds `json:"nodeResourceUtilizationThresholds,omitempty"`
-	NodeAffinityType                  []string                          `json:"nodeAffinityType,omitempty"`
+	NodeResourceUtilizationThresholds *NodeResourceUtilizationThresholds `json:"nodeResourceUtilizationThresholds,omitempty"`
+	NodeAffinityType                  []string                           `json:"nodeAffinityType,omitempty"`
+	PodsHavingTooManyRestarts         *PodsHavingTooManyRestarts         `json:"podsHavingTooManyRestarts,omitempty"`
+	MaxPodLifeTimeSeconds             *uint                              `json:"maxPodLifeTimeSeconds,omitempty"`
+	RemoveDuplicates                  *RemoveDuplicates                  `json:"removeDuplicates,omitempty"`
 }
 
 type Percentage float64
@@ -58,3 +61,12 @@ type NodeResourceUtilizationThresholds struct {
 	TargetThresholds ResourceThresholds `json:"targetThresholds,omitempty"`
 	NumberOfNodes    int                `json:"numberOfNodes,omitempty"`
 }
+
+type PodsHavingTooManyRestarts struct {
+	PodRestartThreshold     int32 `json:"podRestartThreshold,omitempty"`
+	IncludingInitContainers bool  `json:"includingInitContainers,omitempty"`
+}
+
+type RemoveDuplicates struct {
+	ExcludeOwnerKinds []string `json:"excludeOwnerKinds,omitempty"`
+}

pkg/api/v1alpha1/zz_generated.conversion.go

@@ -1,7 +1,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2018 The Kubernetes Authors.
+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.
@@ -16,16 +16,16 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by conversion-gen. Do not edit it manually!
+// Code generated by conversion-gen. DO NOT EDIT.
 
 package v1alpha1
 
 import (
 	unsafe "unsafe"
 
-	api "github.com/kubernetes-incubator/descheduler/pkg/api"
 	conversion "k8s.io/apimachinery/pkg/conversion"
 	runtime "k8s.io/apimachinery/pkg/runtime"
+	api "sigs.k8s.io/descheduler/pkg/api"
 )
 
 func init() {
@@ -34,17 +34,68 @@ func init() {
 
 // RegisterConversions adds conversion functions to the given scheme.
 // Public to allow building arbitrary schemes.
-func RegisterConversions(scheme *runtime.Scheme) error {
-	return scheme.AddGeneratedConversionFuncs(
-		Convert_v1alpha1_DeschedulerPolicy_To_api_DeschedulerPolicy,
-		Convert_api_DeschedulerPolicy_To_v1alpha1_DeschedulerPolicy,
-		Convert_v1alpha1_DeschedulerStrategy_To_api_DeschedulerStrategy,
-		Convert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy,
-		Convert_v1alpha1_NodeResourceUtilizationThresholds_To_api_NodeResourceUtilizationThresholds,
-		Convert_api_NodeResourceUtilizationThresholds_To_v1alpha1_NodeResourceUtilizationThresholds,
-		Convert_v1alpha1_StrategyParameters_To_api_StrategyParameters,
-		Convert_api_StrategyParameters_To_v1alpha1_StrategyParameters,
-	)
+func RegisterConversions(s *runtime.Scheme) error {
+	if err := s.AddGeneratedConversionFunc((*DeschedulerPolicy)(nil), (*api.DeschedulerPolicy)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_v1alpha1_DeschedulerPolicy_To_api_DeschedulerPolicy(a.(*DeschedulerPolicy), b.(*api.DeschedulerPolicy), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.DeschedulerPolicy)(nil), (*DeschedulerPolicy)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_DeschedulerPolicy_To_v1alpha1_DeschedulerPolicy(a.(*api.DeschedulerPolicy), b.(*DeschedulerPolicy), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*DeschedulerStrategy)(nil), (*api.DeschedulerStrategy)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_v1alpha1_DeschedulerStrategy_To_api_DeschedulerStrategy(a.(*DeschedulerStrategy), b.(*api.DeschedulerStrategy), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.DeschedulerStrategy)(nil), (*DeschedulerStrategy)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy(a.(*api.DeschedulerStrategy), b.(*DeschedulerStrategy), 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 {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.NodeResourceUtilizationThresholds)(nil), (*NodeResourceUtilizationThresholds)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_NodeResourceUtilizationThresholds_To_v1alpha1_NodeResourceUtilizationThresholds(a.(*api.NodeResourceUtilizationThresholds), b.(*NodeResourceUtilizationThresholds), 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 {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.PodsHavingTooManyRestarts)(nil), (*PodsHavingTooManyRestarts)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_PodsHavingTooManyRestarts_To_v1alpha1_PodsHavingTooManyRestarts(a.(*api.PodsHavingTooManyRestarts), b.(*PodsHavingTooManyRestarts), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*RemoveDuplicates)(nil), (*api.RemoveDuplicates)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_v1alpha1_RemoveDuplicates_To_api_RemoveDuplicates(a.(*RemoveDuplicates), b.(*api.RemoveDuplicates), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.RemoveDuplicates)(nil), (*RemoveDuplicates)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_RemoveDuplicates_To_v1alpha1_RemoveDuplicates(a.(*api.RemoveDuplicates), b.(*RemoveDuplicates), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*StrategyParameters)(nil), (*api.StrategyParameters)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_v1alpha1_StrategyParameters_To_api_StrategyParameters(a.(*StrategyParameters), b.(*api.StrategyParameters), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.StrategyParameters)(nil), (*StrategyParameters)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_StrategyParameters_To_v1alpha1_StrategyParameters(a.(*api.StrategyParameters), b.(*StrategyParameters), scope)
+	}); err != nil {
+		return err
+	}
+	return nil
 }
 
 func autoConvert_v1alpha1_DeschedulerPolicy_To_api_DeschedulerPolicy(in *DeschedulerPolicy, out *api.DeschedulerPolicy, s conversion.Scope) error {
@@ -70,9 +121,7 @@ func Convert_api_DeschedulerPolicy_To_v1alpha1_DeschedulerPolicy(in *api.Desched
 func autoConvert_v1alpha1_DeschedulerStrategy_To_api_DeschedulerStrategy(in *DeschedulerStrategy, out *api.DeschedulerStrategy, s conversion.Scope) error {
 	out.Enabled = in.Enabled
 	out.Weight = in.Weight
-	if err := Convert_v1alpha1_StrategyParameters_To_api_StrategyParameters(&in.Params, &out.Params, s); err != nil {
-		return err
-	}
+	out.Params = (*api.StrategyParameters)(unsafe.Pointer(in.Params))
 	return nil
 }
 
@@ -84,9 +133,7 @@ func Convert_v1alpha1_DeschedulerStrategy_To_api_DeschedulerStrategy(in *Desched
 func autoConvert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy(in *api.DeschedulerStrategy, out *DeschedulerStrategy, s conversion.Scope) error {
 	out.Enabled = in.Enabled
 	out.Weight = in.Weight
-	if err := Convert_api_StrategyParameters_To_v1alpha1_StrategyParameters(&in.Params, &out.Params, s); err != nil {
-		return err
-	}
+	out.Params = (*StrategyParameters)(unsafe.Pointer(in.Params))
 	return nil
 }
 
@@ -119,11 +166,54 @@ func Convert_api_NodeResourceUtilizationThresholds_To_v1alpha1_NodeResourceUtili
 	return autoConvert_api_NodeResourceUtilizationThresholds_To_v1alpha1_NodeResourceUtilizationThresholds(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
+	return nil
+}
+
+// Convert_v1alpha1_PodsHavingTooManyRestarts_To_api_PodsHavingTooManyRestarts is an autogenerated conversion function.
+func Convert_v1alpha1_PodsHavingTooManyRestarts_To_api_PodsHavingTooManyRestarts(in *PodsHavingTooManyRestarts, out *api.PodsHavingTooManyRestarts, s conversion.Scope) error {
+	return autoConvert_v1alpha1_PodsHavingTooManyRestarts_To_api_PodsHavingTooManyRestarts(in, out, s)
+}
+
+func autoConvert_api_PodsHavingTooManyRestarts_To_v1alpha1_PodsHavingTooManyRestarts(in *api.PodsHavingTooManyRestarts, out *PodsHavingTooManyRestarts, s conversion.Scope) error {
+	out.PodRestartThreshold = in.PodRestartThreshold
+	out.IncludingInitContainers = in.IncludingInitContainers
+	return nil
+}
+
+// Convert_api_PodsHavingTooManyRestarts_To_v1alpha1_PodsHavingTooManyRestarts is an autogenerated conversion function.
+func Convert_api_PodsHavingTooManyRestarts_To_v1alpha1_PodsHavingTooManyRestarts(in *api.PodsHavingTooManyRestarts, out *PodsHavingTooManyRestarts, s conversion.Scope) error {
+	return autoConvert_api_PodsHavingTooManyRestarts_To_v1alpha1_PodsHavingTooManyRestarts(in, out, s)
+}
+
+func autoConvert_v1alpha1_RemoveDuplicates_To_api_RemoveDuplicates(in *RemoveDuplicates, out *api.RemoveDuplicates, s conversion.Scope) error {
+	out.ExcludeOwnerKinds = *(*[]string)(unsafe.Pointer(&in.ExcludeOwnerKinds))
+	return nil
+}
+
+// Convert_v1alpha1_RemoveDuplicates_To_api_RemoveDuplicates is an autogenerated conversion function.
+func Convert_v1alpha1_RemoveDuplicates_To_api_RemoveDuplicates(in *RemoveDuplicates, out *api.RemoveDuplicates, s conversion.Scope) error {
+	return autoConvert_v1alpha1_RemoveDuplicates_To_api_RemoveDuplicates(in, out, s)
+}
+
+func autoConvert_api_RemoveDuplicates_To_v1alpha1_RemoveDuplicates(in *api.RemoveDuplicates, out *RemoveDuplicates, s conversion.Scope) error {
+	out.ExcludeOwnerKinds = *(*[]string)(unsafe.Pointer(&in.ExcludeOwnerKinds))
+	return nil
+}
+
+// Convert_api_RemoveDuplicates_To_v1alpha1_RemoveDuplicates is an autogenerated conversion function.
+func Convert_api_RemoveDuplicates_To_v1alpha1_RemoveDuplicates(in *api.RemoveDuplicates, out *RemoveDuplicates, s conversion.Scope) error {
+	return autoConvert_api_RemoveDuplicates_To_v1alpha1_RemoveDuplicates(in, out, s)
+}
+
 func autoConvert_v1alpha1_StrategyParameters_To_api_StrategyParameters(in *StrategyParameters, out *api.StrategyParameters, s conversion.Scope) error {
-	if err := Convert_v1alpha1_NodeResourceUtilizationThresholds_To_api_NodeResourceUtilizationThresholds(&in.NodeResourceUtilizationThresholds, &out.NodeResourceUtilizationThresholds, s); err != nil {
-		return err
-	}
+	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.RemoveDuplicates = (*api.RemoveDuplicates)(unsafe.Pointer(in.RemoveDuplicates))
 	return nil
 }
 
@@ -133,10 +223,11 @@ func Convert_v1alpha1_StrategyParameters_To_api_StrategyParameters(in *StrategyP
 }
 
 func autoConvert_api_StrategyParameters_To_v1alpha1_StrategyParameters(in *api.StrategyParameters, out *StrategyParameters, s conversion.Scope) error {
-	if err := Convert_api_NodeResourceUtilizationThresholds_To_v1alpha1_NodeResourceUtilizationThresholds(&in.NodeResourceUtilizationThresholds, &out.NodeResourceUtilizationThresholds, s); err != nil {
-		return err
-	}
+	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.RemoveDuplicates = (*RemoveDuplicates)(unsafe.Pointer(in.RemoveDuplicates))
 	return nil
 }
 

pkg/api/v1alpha1/zz_generated.deepcopy.go

@@ -1,7 +1,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2018 The Kubernetes Authors.
+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.
@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by deepcopy-gen. Do not edit it manually!
+// Code generated by deepcopy-gen. DO NOT EDIT.
 
 package v1alpha1
 
@@ -32,9 +32,7 @@ func (in *DeschedulerPolicy) DeepCopyInto(out *DeschedulerPolicy) {
 		in, out := &in.Strategies, &out.Strategies
 		*out = make(StrategyList, len(*in))
 		for key, val := range *in {
-			newVal := new(DeschedulerStrategy)
-			val.DeepCopyInto(newVal)
-			(*out)[key] = *newVal
+			(*out)[key] = *val.DeepCopy()
 		}
 	}
 	return
@@ -54,15 +52,18 @@ func (in *DeschedulerPolicy) DeepCopy() *DeschedulerPolicy {
 func (in *DeschedulerPolicy) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *DeschedulerStrategy) DeepCopyInto(out *DeschedulerStrategy) {
 	*out = *in
-	in.Params.DeepCopyInto(&out.Params)
+	if in.Params != nil {
+		in, out := &in.Params, &out.Params
+		*out = new(StrategyParameters)
+		(*in).DeepCopyInto(*out)
+	}
 	return
 }
 
@@ -106,15 +107,115 @@ 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 *PodsHavingTooManyRestarts) DeepCopyInto(out *PodsHavingTooManyRestarts) {
+	*out = *in
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PodsHavingTooManyRestarts.
+func (in *PodsHavingTooManyRestarts) DeepCopy() *PodsHavingTooManyRestarts {
+	if in == nil {
+		return nil
+	}
+	out := new(PodsHavingTooManyRestarts)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *RemoveDuplicates) DeepCopyInto(out *RemoveDuplicates) {
+	*out = *in
+	if in.ExcludeOwnerKinds != nil {
+		in, out := &in.ExcludeOwnerKinds, &out.ExcludeOwnerKinds
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new RemoveDuplicates.
+func (in *RemoveDuplicates) DeepCopy() *RemoveDuplicates {
+	if in == nil {
+		return nil
+	}
+	out := new(RemoveDuplicates)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in ResourceThresholds) DeepCopyInto(out *ResourceThresholds) {
+	{
+		in := &in
+		*out = make(ResourceThresholds, len(*in))
+		for key, val := range *in {
+			(*out)[key] = val
+		}
+		return
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ResourceThresholds.
+func (in ResourceThresholds) DeepCopy() ResourceThresholds {
+	if in == nil {
+		return nil
+	}
+	out := new(ResourceThresholds)
+	in.DeepCopyInto(out)
+	return *out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in StrategyList) DeepCopyInto(out *StrategyList) {
+	{
+		in := &in
+		*out = make(StrategyList, len(*in))
+		for key, val := range *in {
+			(*out)[key] = *val.DeepCopy()
+		}
+		return
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new StrategyList.
+func (in StrategyList) DeepCopy() StrategyList {
+	if in == nil {
+		return nil
+	}
+	out := new(StrategyList)
+	in.DeepCopyInto(out)
+	return *out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *StrategyParameters) DeepCopyInto(out *StrategyParameters) {
 	*out = *in
-	in.NodeResourceUtilizationThresholds.DeepCopyInto(&out.NodeResourceUtilizationThresholds)
+	if in.NodeResourceUtilizationThresholds != nil {
+		in, out := &in.NodeResourceUtilizationThresholds, &out.NodeResourceUtilizationThresholds
+		*out = new(NodeResourceUtilizationThresholds)
+		(*in).DeepCopyInto(*out)
+	}
 	if in.NodeAffinityType != nil {
 		in, out := &in.NodeAffinityType, &out.NodeAffinityType
 		*out = make([]string, len(*in))
 		copy(*out, *in)
 	}
+	if in.PodsHavingTooManyRestarts != nil {
+		in, out := &in.PodsHavingTooManyRestarts, &out.PodsHavingTooManyRestarts
+		*out = new(PodsHavingTooManyRestarts)
+		**out = **in
+	}
+	if in.MaxPodLifeTimeSeconds != nil {
+		in, out := &in.MaxPodLifeTimeSeconds, &out.MaxPodLifeTimeSeconds
+		*out = new(uint)
+		**out = **in
+	}
+	if in.RemoveDuplicates != nil {
+		in, out := &in.RemoveDuplicates, &out.RemoveDuplicates
+		*out = new(RemoveDuplicates)
+		(*in).DeepCopyInto(*out)
+	}
 	return
 }
 

pkg/api/v1alpha1/zz_generated.defaults.go

@@ -1,7 +1,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2018 The Kubernetes Authors.
+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.
@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by defaulter-gen. Do not edit it manually!
+// Code generated by defaulter-gen. DO NOT EDIT.
 
 package v1alpha1
 

pkg/api/zz_generated.deepcopy.go

@@ -1,7 +1,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2018 The Kubernetes Authors.
+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.
@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by deepcopy-gen. Do not edit it manually!
+// Code generated by deepcopy-gen. DO NOT EDIT.
 
 package api
 
@@ -32,9 +32,7 @@ func (in *DeschedulerPolicy) DeepCopyInto(out *DeschedulerPolicy) {
 		in, out := &in.Strategies, &out.Strategies
 		*out = make(StrategyList, len(*in))
 		for key, val := range *in {
-			newVal := new(DeschedulerStrategy)
-			val.DeepCopyInto(newVal)
-			(*out)[key] = *newVal
+			(*out)[key] = *val.DeepCopy()
 		}
 	}
 	return
@@ -54,15 +52,18 @@ func (in *DeschedulerPolicy) DeepCopy() *DeschedulerPolicy {
 func (in *DeschedulerPolicy) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *DeschedulerStrategy) DeepCopyInto(out *DeschedulerStrategy) {
 	*out = *in
-	in.Params.DeepCopyInto(&out.Params)
+	if in.Params != nil {
+		in, out := &in.Params, &out.Params
+		*out = new(StrategyParameters)
+		(*in).DeepCopyInto(*out)
+	}
 	return
 }
 
@@ -106,15 +107,115 @@ 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 *PodsHavingTooManyRestarts) DeepCopyInto(out *PodsHavingTooManyRestarts) {
+	*out = *in
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PodsHavingTooManyRestarts.
+func (in *PodsHavingTooManyRestarts) DeepCopy() *PodsHavingTooManyRestarts {
+	if in == nil {
+		return nil
+	}
+	out := new(PodsHavingTooManyRestarts)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *RemoveDuplicates) DeepCopyInto(out *RemoveDuplicates) {
+	*out = *in
+	if in.ExcludeOwnerKinds != nil {
+		in, out := &in.ExcludeOwnerKinds, &out.ExcludeOwnerKinds
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new RemoveDuplicates.
+func (in *RemoveDuplicates) DeepCopy() *RemoveDuplicates {
+	if in == nil {
+		return nil
+	}
+	out := new(RemoveDuplicates)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in ResourceThresholds) DeepCopyInto(out *ResourceThresholds) {
+	{
+		in := &in
+		*out = make(ResourceThresholds, len(*in))
+		for key, val := range *in {
+			(*out)[key] = val
+		}
+		return
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ResourceThresholds.
+func (in ResourceThresholds) DeepCopy() ResourceThresholds {
+	if in == nil {
+		return nil
+	}
+	out := new(ResourceThresholds)
+	in.DeepCopyInto(out)
+	return *out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in StrategyList) DeepCopyInto(out *StrategyList) {
+	{
+		in := &in
+		*out = make(StrategyList, len(*in))
+		for key, val := range *in {
+			(*out)[key] = *val.DeepCopy()
+		}
+		return
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new StrategyList.
+func (in StrategyList) DeepCopy() StrategyList {
+	if in == nil {
+		return nil
+	}
+	out := new(StrategyList)
+	in.DeepCopyInto(out)
+	return *out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *StrategyParameters) DeepCopyInto(out *StrategyParameters) {
 	*out = *in
-	in.NodeResourceUtilizationThresholds.DeepCopyInto(&out.NodeResourceUtilizationThresholds)
+	if in.NodeResourceUtilizationThresholds != nil {
+		in, out := &in.NodeResourceUtilizationThresholds, &out.NodeResourceUtilizationThresholds
+		*out = new(NodeResourceUtilizationThresholds)
+		(*in).DeepCopyInto(*out)
+	}
 	if in.NodeAffinityType != nil {
 		in, out := &in.NodeAffinityType, &out.NodeAffinityType
 		*out = make([]string, len(*in))
 		copy(*out, *in)
 	}
+	if in.PodsHavingTooManyRestarts != nil {
+		in, out := &in.PodsHavingTooManyRestarts, &out.PodsHavingTooManyRestarts
+		*out = new(PodsHavingTooManyRestarts)
+		**out = **in
+	}
+	if in.MaxPodLifeTimeSeconds != nil {
+		in, out := &in.MaxPodLifeTimeSeconds, &out.MaxPodLifeTimeSeconds
+		*out = new(uint)
+		**out = **in
+	}
+	if in.RemoveDuplicates != nil {
+		in, out := &in.RemoveDuplicates, &out.RemoveDuplicates
+		*out = new(RemoveDuplicates)
+		(*in).DeepCopyInto(*out)
+	}
 	return
 }
 

pkg/apis/componentconfig/doc.go

@@ -16,4 +16,4 @@ limitations under the License.
 
 // +k8s:deepcopy-gen=package,register
 
-package componentconfig // import "github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig"
+package componentconfig // import "sigs.k8s.io/descheduler/pkg/apis/componentconfig"

pkg/apis/componentconfig/install/install.go

@@ -1,48 +0,0 @@
-/*
-Copyright 2017 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 install installs the descheduler's componentconfig API group.
-package install
-
-import (
-	"k8s.io/apimachinery/pkg/apimachinery/announced"
-	"k8s.io/apimachinery/pkg/apimachinery/registered"
-	"k8s.io/apimachinery/pkg/runtime"
-
-	"github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig"
-	"github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig/v1alpha1"
-	deschedulerscheme "github.com/kubernetes-incubator/descheduler/pkg/descheduler/scheme"
-)
-
-func init() {
-	Install(deschedulerscheme.GroupFactoryRegistry, deschedulerscheme.Registry, deschedulerscheme.Scheme)
-}
-
-// Install registers the API group and adds types to a scheme
-func Install(groupFactoryRegistry announced.APIGroupFactoryRegistry, registry *registered.APIRegistrationManager, scheme *runtime.Scheme) {
-	if err := announced.NewGroupMetaFactory(
-		&announced.GroupMetaFactoryArgs{
-			GroupName:                  componentconfig.GroupName,
-			VersionPreferenceOrder:     []string{v1alpha1.SchemeGroupVersion.Version},
-			AddInternalObjectsToScheme: componentconfig.AddToScheme,
-		},
-		announced.VersionToSchemeFunc{
-			v1alpha1.SchemeGroupVersion.Version: v1alpha1.AddToScheme,
-		},
-	).Announce(groupFactoryRegistry).RegisterAndEnable(registry, scheme); err != nil {
-		panic(err)
-	}
-}

pkg/apis/componentconfig/register.go

@@ -19,6 +19,8 @@ package componentconfig
 import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
+
+	"sigs.k8s.io/descheduler/pkg/descheduler/scheme"
 )
 
 var (
@@ -32,6 +34,12 @@ 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.generated.go

@@ -1,629 +0,0 @@
-/*
-Copyright 2017 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.
-*/
-
-// Code generated by codecgen - DO NOT EDIT.
-
-package componentconfig
-
-import (
-	"errors"
-	"fmt"
-	codec1978 "github.com/ugorji/go/codec"
-	pkg1_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"reflect"
-	"runtime"
-	time "time"
-)
-
-const (
-	// ----- content types ----
-	codecSelferCcUTF81234 = 1
-	codecSelferCcRAW1234  = 0
-	// ----- value types used ----
-	codecSelferValueTypeArray1234  = 10
-	codecSelferValueTypeMap1234    = 9
-	codecSelferValueTypeString1234 = 6
-	codecSelferValueTypeInt1234    = 2
-	codecSelferValueTypeUint1234   = 3
-	codecSelferValueTypeFloat1234  = 4
-)
-
-var (
-	codecSelferBitsize1234                         = uint8(reflect.TypeOf(uint(0)).Bits())
-	errCodecSelferOnlyMapOrArrayEncodeToStruct1234 = errors.New(`only encoded map or array can be decoded into a struct`)
-)
-
-type codecSelfer1234 struct{}
-
-func init() {
-	if codec1978.GenVersion != 8 {
-		_, file, _, _ := runtime.Caller(0)
-		err := fmt.Errorf("codecgen version mismatch: current: %v, need %v. Re-generate file: %v",
-			8, codec1978.GenVersion, file)
-		panic(err)
-	}
-	if false { // reference the types, but skip this branch at build/run time
-		var v0 pkg1_v1.TypeMeta
-		var v1 time.Duration
-		_, _ = v0, v1
-	}
-}
-
-func (x *DeschedulerConfiguration) CodecEncodeSelf(e *codec1978.Encoder) {
-	var h codecSelfer1234
-	z, r := codec1978.GenHelperEncoder(e)
-	_, _, _ = h, z, r
-	if x == nil {
-		r.EncodeNil()
-	} else {
-		yym1 := z.EncBinary()
-		_ = yym1
-		if false {
-		} else if yyxt1 := z.Extension(z.I2Rtid(x)); yyxt1 != nil {
-			z.EncExtension(x, yyxt1)
-		} else {
-			yysep2 := !z.EncBinary()
-			yy2arr2 := z.EncBasicHandle().StructToArray
-			var yyq2 [8]bool
-			_ = yyq2
-			_, _ = yysep2, yy2arr2
-			const yyr2 bool = false
-			yyq2[0] = x.Kind != ""
-			yyq2[1] = x.APIVersion != ""
-			if yyr2 || yy2arr2 {
-				r.WriteArrayStart(8)
-			} else {
-				var yynn2 = 6
-				for _, b := range yyq2 {
-					if b {
-						yynn2++
-					}
-				}
-				r.WriteMapStart(yynn2)
-				yynn2 = 0
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[0] {
-					yym4 := z.EncBinary()
-					_ = yym4
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.Kind))
-					}
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, "")
-				}
-			} else {
-				if yyq2[0] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `kind`)
-					r.WriteMapElemValue()
-					yym5 := z.EncBinary()
-					_ = yym5
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.Kind))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[1] {
-					yym7 := z.EncBinary()
-					_ = yym7
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.APIVersion))
-					}
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, "")
-				}
-			} else {
-				if yyq2[1] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `apiVersion`)
-					r.WriteMapElemValue()
-					yym8 := z.EncBinary()
-					_ = yym8
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.APIVersion))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				yym10 := z.EncBinary()
-				_ = yym10
-				if false {
-				} else if yyxt10 := z.Extension(z.I2Rtid(x.DeschedulingInterval)); yyxt10 != nil {
-					z.EncExtension(x.DeschedulingInterval, yyxt10)
-				} else {
-					r.EncodeInt(int64(x.DeschedulingInterval))
-				}
-			} else {
-				r.WriteMapElemKey()
-				r.EncStructFieldKey(codecSelferValueTypeString1234, `DeschedulingInterval`)
-				r.WriteMapElemValue()
-				yym11 := z.EncBinary()
-				_ = yym11
-				if false {
-				} else if yyxt11 := z.Extension(z.I2Rtid(x.DeschedulingInterval)); yyxt11 != nil {
-					z.EncExtension(x.DeschedulingInterval, yyxt11)
-				} else {
-					r.EncodeInt(int64(x.DeschedulingInterval))
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				yym13 := z.EncBinary()
-				_ = yym13
-				if false {
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, string(x.KubeconfigFile))
-				}
-			} else {
-				r.WriteMapElemKey()
-				r.EncStructFieldKey(codecSelferValueTypeString1234, `KubeconfigFile`)
-				r.WriteMapElemValue()
-				yym14 := z.EncBinary()
-				_ = yym14
-				if false {
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, string(x.KubeconfigFile))
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				yym16 := z.EncBinary()
-				_ = yym16
-				if false {
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, string(x.PolicyConfigFile))
-				}
-			} else {
-				r.WriteMapElemKey()
-				r.EncStructFieldKey(codecSelferValueTypeString1234, `PolicyConfigFile`)
-				r.WriteMapElemValue()
-				yym17 := z.EncBinary()
-				_ = yym17
-				if false {
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, string(x.PolicyConfigFile))
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				yym19 := z.EncBinary()
-				_ = yym19
-				if false {
-				} else {
-					r.EncodeBool(bool(x.DryRun))
-				}
-			} else {
-				r.WriteMapElemKey()
-				r.EncStructFieldKey(codecSelferValueTypeString1234, `DryRun`)
-				r.WriteMapElemValue()
-				yym20 := z.EncBinary()
-				_ = yym20
-				if false {
-				} else {
-					r.EncodeBool(bool(x.DryRun))
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				yym22 := z.EncBinary()
-				_ = yym22
-				if false {
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, string(x.NodeSelector))
-				}
-			} else {
-				r.WriteMapElemKey()
-				r.EncStructFieldKey(codecSelferValueTypeString1234, `NodeSelector`)
-				r.WriteMapElemValue()
-				yym23 := z.EncBinary()
-				_ = yym23
-				if false {
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, string(x.NodeSelector))
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				yym25 := z.EncBinary()
-				_ = yym25
-				if false {
-				} else {
-					r.EncodeInt(int64(x.MaxNoOfPodsToEvictPerNode))
-				}
-			} else {
-				r.WriteMapElemKey()
-				r.EncStructFieldKey(codecSelferValueTypeString1234, `MaxNoOfPodsToEvictPerNode`)
-				r.WriteMapElemValue()
-				yym26 := z.EncBinary()
-				_ = yym26
-				if false {
-				} else {
-					r.EncodeInt(int64(x.MaxNoOfPodsToEvictPerNode))
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayEnd()
-			} else {
-				r.WriteMapEnd()
-			}
-		}
-	}
-}
-
-func (x *DeschedulerConfiguration) CodecDecodeSelf(d *codec1978.Decoder) {
-	var h codecSelfer1234
-	z, r := codec1978.GenHelperDecoder(d)
-	_, _, _ = h, z, r
-	yym1 := z.DecBinary()
-	_ = yym1
-	if false {
-	} else if yyxt1 := z.Extension(z.I2Rtid(x)); yyxt1 != nil {
-		z.DecExtension(x, yyxt1)
-	} else {
-		yyct2 := r.ContainerType()
-		if yyct2 == codecSelferValueTypeMap1234 {
-			yyl2 := r.ReadMapStart()
-			if yyl2 == 0 {
-				r.ReadMapEnd()
-			} else {
-				x.codecDecodeSelfFromMap(yyl2, d)
-			}
-		} else if yyct2 == codecSelferValueTypeArray1234 {
-			yyl2 := r.ReadArrayStart()
-			if yyl2 == 0 {
-				r.ReadArrayEnd()
-			} else {
-				x.codecDecodeSelfFromArray(yyl2, d)
-			}
-		} else {
-			panic(errCodecSelferOnlyMapOrArrayEncodeToStruct1234)
-		}
-	}
-}
-
-func (x *DeschedulerConfiguration) codecDecodeSelfFromMap(l int, d *codec1978.Decoder) {
-	var h codecSelfer1234
-	z, r := codec1978.GenHelperDecoder(d)
-	_, _, _ = h, z, r
-	var yyhl3 bool = l >= 0
-	for yyj3 := 0; ; yyj3++ {
-		if yyhl3 {
-			if yyj3 >= l {
-				break
-			}
-		} else {
-			if r.CheckBreak() {
-				break
-			}
-		}
-		r.ReadMapElemKey()
-		yys3 := z.StringView(r.DecStructFieldKey(codecSelferValueTypeString1234, z.DecScratchArrayBuffer()))
-		r.ReadMapElemValue()
-		switch yys3 {
-		case "kind":
-			if r.TryDecodeAsNil() {
-				x.Kind = ""
-			} else {
-				yyv4 := &x.Kind
-				yym5 := z.DecBinary()
-				_ = yym5
-				if false {
-				} else {
-					*((*string)(yyv4)) = r.DecodeString()
-				}
-			}
-		case "apiVersion":
-			if r.TryDecodeAsNil() {
-				x.APIVersion = ""
-			} else {
-				yyv6 := &x.APIVersion
-				yym7 := z.DecBinary()
-				_ = yym7
-				if false {
-				} else {
-					*((*string)(yyv6)) = r.DecodeString()
-				}
-			}
-		case "DeschedulingInterval":
-			if r.TryDecodeAsNil() {
-				x.DeschedulingInterval = 0
-			} else {
-				yyv8 := &x.DeschedulingInterval
-				yym9 := z.DecBinary()
-				_ = yym9
-				if false {
-				} else if yyxt9 := z.Extension(z.I2Rtid(yyv8)); yyxt9 != nil {
-					z.DecExtension(yyv8, yyxt9)
-				} else {
-					*((*int64)(yyv8)) = int64(r.DecodeInt(64))
-				}
-			}
-		case "KubeconfigFile":
-			if r.TryDecodeAsNil() {
-				x.KubeconfigFile = ""
-			} else {
-				yyv10 := &x.KubeconfigFile
-				yym11 := z.DecBinary()
-				_ = yym11
-				if false {
-				} else {
-					*((*string)(yyv10)) = r.DecodeString()
-				}
-			}
-		case "PolicyConfigFile":
-			if r.TryDecodeAsNil() {
-				x.PolicyConfigFile = ""
-			} else {
-				yyv12 := &x.PolicyConfigFile
-				yym13 := z.DecBinary()
-				_ = yym13
-				if false {
-				} else {
-					*((*string)(yyv12)) = r.DecodeString()
-				}
-			}
-		case "DryRun":
-			if r.TryDecodeAsNil() {
-				x.DryRun = false
-			} else {
-				yyv14 := &x.DryRun
-				yym15 := z.DecBinary()
-				_ = yym15
-				if false {
-				} else {
-					*((*bool)(yyv14)) = r.DecodeBool()
-				}
-			}
-		case "NodeSelector":
-			if r.TryDecodeAsNil() {
-				x.NodeSelector = ""
-			} else {
-				yyv16 := &x.NodeSelector
-				yym17 := z.DecBinary()
-				_ = yym17
-				if false {
-				} else {
-					*((*string)(yyv16)) = r.DecodeString()
-				}
-			}
-		case "MaxNoOfPodsToEvictPerNode":
-			if r.TryDecodeAsNil() {
-				x.MaxNoOfPodsToEvictPerNode = 0
-			} else {
-				yyv18 := &x.MaxNoOfPodsToEvictPerNode
-				yym19 := z.DecBinary()
-				_ = yym19
-				if false {
-				} else {
-					*((*int)(yyv18)) = int(r.DecodeInt(codecSelferBitsize1234))
-				}
-			}
-		default:
-			z.DecStructFieldNotFound(-1, yys3)
-		} // end switch yys3
-	} // end for yyj3
-	r.ReadMapEnd()
-}
-
-func (x *DeschedulerConfiguration) codecDecodeSelfFromArray(l int, d *codec1978.Decoder) {
-	var h codecSelfer1234
-	z, r := codec1978.GenHelperDecoder(d)
-	_, _, _ = h, z, r
-	var yyj20 int
-	var yyb20 bool
-	var yyhl20 bool = l >= 0
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.Kind = ""
-	} else {
-		yyv21 := &x.Kind
-		yym22 := z.DecBinary()
-		_ = yym22
-		if false {
-		} else {
-			*((*string)(yyv21)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.APIVersion = ""
-	} else {
-		yyv23 := &x.APIVersion
-		yym24 := z.DecBinary()
-		_ = yym24
-		if false {
-		} else {
-			*((*string)(yyv23)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.DeschedulingInterval = 0
-	} else {
-		yyv25 := &x.DeschedulingInterval
-		yym26 := z.DecBinary()
-		_ = yym26
-		if false {
-		} else if yyxt26 := z.Extension(z.I2Rtid(yyv25)); yyxt26 != nil {
-			z.DecExtension(yyv25, yyxt26)
-		} else {
-			*((*int64)(yyv25)) = int64(r.DecodeInt(64))
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.KubeconfigFile = ""
-	} else {
-		yyv27 := &x.KubeconfigFile
-		yym28 := z.DecBinary()
-		_ = yym28
-		if false {
-		} else {
-			*((*string)(yyv27)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.PolicyConfigFile = ""
-	} else {
-		yyv29 := &x.PolicyConfigFile
-		yym30 := z.DecBinary()
-		_ = yym30
-		if false {
-		} else {
-			*((*string)(yyv29)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.DryRun = false
-	} else {
-		yyv31 := &x.DryRun
-		yym32 := z.DecBinary()
-		_ = yym32
-		if false {
-		} else {
-			*((*bool)(yyv31)) = r.DecodeBool()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.NodeSelector = ""
-	} else {
-		yyv33 := &x.NodeSelector
-		yym34 := z.DecBinary()
-		_ = yym34
-		if false {
-		} else {
-			*((*string)(yyv33)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.MaxNoOfPodsToEvictPerNode = 0
-	} else {
-		yyv35 := &x.MaxNoOfPodsToEvictPerNode
-		yym36 := z.DecBinary()
-		_ = yym36
-		if false {
-		} else {
-			*((*int)(yyv35)) = int(r.DecodeInt(codecSelferBitsize1234))
-		}
-	}
-	for {
-		yyj20++
-		if yyhl20 {
-			yyb20 = yyj20 > l
-		} else {
-			yyb20 = r.CheckBreak()
-		}
-		if yyb20 {
-			break
-		}
-		r.ReadArrayElem()
-		z.DecStructFieldNotFound(yyj20-1, "")
-	}
-	r.ReadArrayEnd()
-}

pkg/apis/componentconfig/types.go

@@ -45,4 +45,7 @@ type DeschedulerConfiguration struct {
 
 	// MaxNoOfPodsToEvictPerNode restricts maximum of pods to be evicted per node.
 	MaxNoOfPodsToEvictPerNode int
+
+	// EvictLocalStoragePods allows pods using local storage to be evicted.
+	EvictLocalStoragePods bool
 }

pkg/apis/componentconfig/v1alpha1/doc.go

@@ -15,10 +15,10 @@ limitations under the License.
 */
 
 // +k8s:deepcopy-gen=package,register
-// +k8s:conversion-gen=github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig
+// +k8s:conversion-gen=sigs.k8s.io/descheduler/pkg/apis/componentconfig
 // +k8s:defaulter-gen=TypeMeta
 
 // Package v1alpha1 is the v1alpha1 version of the descheduler's componentconfig API
 // +groupName=deschedulercomponentconfig
 
-package v1alpha1 // import "github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig/v1alpha1"
+package v1alpha1 // import "sigs.k8s.io/descheduler/pkg/apis/componentconfig/v1alpha1"

pkg/apis/componentconfig/v1alpha1/types.generated.go

@@ -1,664 +0,0 @@
-/*
-Copyright 2017 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.
-*/
-
-// Code generated by codecgen - DO NOT EDIT.
-
-package v1alpha1
-
-import (
-	"errors"
-	"fmt"
-	codec1978 "github.com/ugorji/go/codec"
-	pkg1_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"reflect"
-	"runtime"
-	time "time"
-)
-
-const (
-	// ----- content types ----
-	codecSelferCcUTF81234 = 1
-	codecSelferCcRAW1234  = 0
-	// ----- value types used ----
-	codecSelferValueTypeArray1234  = 10
-	codecSelferValueTypeMap1234    = 9
-	codecSelferValueTypeString1234 = 6
-	codecSelferValueTypeInt1234    = 2
-	codecSelferValueTypeUint1234   = 3
-	codecSelferValueTypeFloat1234  = 4
-)
-
-var (
-	codecSelferBitsize1234                         = uint8(reflect.TypeOf(uint(0)).Bits())
-	errCodecSelferOnlyMapOrArrayEncodeToStruct1234 = errors.New(`only encoded map or array can be decoded into a struct`)
-)
-
-type codecSelfer1234 struct{}
-
-func init() {
-	if codec1978.GenVersion != 8 {
-		_, file, _, _ := runtime.Caller(0)
-		err := fmt.Errorf("codecgen version mismatch: current: %v, need %v. Re-generate file: %v",
-			8, codec1978.GenVersion, file)
-		panic(err)
-	}
-	if false { // reference the types, but skip this branch at build/run time
-		var v0 pkg1_v1.TypeMeta
-		var v1 time.Duration
-		_, _ = v0, v1
-	}
-}
-
-func (x *DeschedulerConfiguration) CodecEncodeSelf(e *codec1978.Encoder) {
-	var h codecSelfer1234
-	z, r := codec1978.GenHelperEncoder(e)
-	_, _, _ = h, z, r
-	if x == nil {
-		r.EncodeNil()
-	} else {
-		yym1 := z.EncBinary()
-		_ = yym1
-		if false {
-		} else if yyxt1 := z.Extension(z.I2Rtid(x)); yyxt1 != nil {
-			z.EncExtension(x, yyxt1)
-		} else {
-			yysep2 := !z.EncBinary()
-			yy2arr2 := z.EncBasicHandle().StructToArray
-			var yyq2 [8]bool
-			_ = yyq2
-			_, _ = yysep2, yy2arr2
-			const yyr2 bool = false
-			yyq2[0] = x.Kind != ""
-			yyq2[1] = x.APIVersion != ""
-			yyq2[2] = x.DeschedulingInterval != 0
-			yyq2[4] = x.PolicyConfigFile != ""
-			yyq2[5] = x.DryRun != false
-			yyq2[6] = x.NodeSelector != ""
-			yyq2[7] = x.MaxNoOfPodsToEvictPerNode != 0
-			if yyr2 || yy2arr2 {
-				r.WriteArrayStart(8)
-			} else {
-				var yynn2 = 1
-				for _, b := range yyq2 {
-					if b {
-						yynn2++
-					}
-				}
-				r.WriteMapStart(yynn2)
-				yynn2 = 0
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[0] {
-					yym4 := z.EncBinary()
-					_ = yym4
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.Kind))
-					}
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, "")
-				}
-			} else {
-				if yyq2[0] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `kind`)
-					r.WriteMapElemValue()
-					yym5 := z.EncBinary()
-					_ = yym5
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.Kind))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[1] {
-					yym7 := z.EncBinary()
-					_ = yym7
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.APIVersion))
-					}
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, "")
-				}
-			} else {
-				if yyq2[1] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `apiVersion`)
-					r.WriteMapElemValue()
-					yym8 := z.EncBinary()
-					_ = yym8
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.APIVersion))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[2] {
-					yym10 := z.EncBinary()
-					_ = yym10
-					if false {
-					} else if yyxt10 := z.Extension(z.I2Rtid(x.DeschedulingInterval)); yyxt10 != nil {
-						z.EncExtension(x.DeschedulingInterval, yyxt10)
-					} else {
-						r.EncodeInt(int64(x.DeschedulingInterval))
-					}
-				} else {
-					r.EncodeInt(0)
-				}
-			} else {
-				if yyq2[2] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `deschedulingInterval`)
-					r.WriteMapElemValue()
-					yym11 := z.EncBinary()
-					_ = yym11
-					if false {
-					} else if yyxt11 := z.Extension(z.I2Rtid(x.DeschedulingInterval)); yyxt11 != nil {
-						z.EncExtension(x.DeschedulingInterval, yyxt11)
-					} else {
-						r.EncodeInt(int64(x.DeschedulingInterval))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				yym13 := z.EncBinary()
-				_ = yym13
-				if false {
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, string(x.KubeconfigFile))
-				}
-			} else {
-				r.WriteMapElemKey()
-				r.EncStructFieldKey(codecSelferValueTypeString1234, `kubeconfigFile`)
-				r.WriteMapElemValue()
-				yym14 := z.EncBinary()
-				_ = yym14
-				if false {
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, string(x.KubeconfigFile))
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[4] {
-					yym16 := z.EncBinary()
-					_ = yym16
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.PolicyConfigFile))
-					}
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, "")
-				}
-			} else {
-				if yyq2[4] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `policyConfigFile`)
-					r.WriteMapElemValue()
-					yym17 := z.EncBinary()
-					_ = yym17
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.PolicyConfigFile))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[5] {
-					yym19 := z.EncBinary()
-					_ = yym19
-					if false {
-					} else {
-						r.EncodeBool(bool(x.DryRun))
-					}
-				} else {
-					r.EncodeBool(false)
-				}
-			} else {
-				if yyq2[5] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `dryRun`)
-					r.WriteMapElemValue()
-					yym20 := z.EncBinary()
-					_ = yym20
-					if false {
-					} else {
-						r.EncodeBool(bool(x.DryRun))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[6] {
-					yym22 := z.EncBinary()
-					_ = yym22
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.NodeSelector))
-					}
-				} else {
-					r.EncodeString(codecSelferCcUTF81234, "")
-				}
-			} else {
-				if yyq2[6] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `nodeSelector`)
-					r.WriteMapElemValue()
-					yym23 := z.EncBinary()
-					_ = yym23
-					if false {
-					} else {
-						r.EncodeString(codecSelferCcUTF81234, string(x.NodeSelector))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayElem()
-				if yyq2[7] {
-					yym25 := z.EncBinary()
-					_ = yym25
-					if false {
-					} else {
-						r.EncodeInt(int64(x.MaxNoOfPodsToEvictPerNode))
-					}
-				} else {
-					r.EncodeInt(0)
-				}
-			} else {
-				if yyq2[7] {
-					r.WriteMapElemKey()
-					r.EncStructFieldKey(codecSelferValueTypeString1234, `maxNoOfPodsToEvictPerNode`)
-					r.WriteMapElemValue()
-					yym26 := z.EncBinary()
-					_ = yym26
-					if false {
-					} else {
-						r.EncodeInt(int64(x.MaxNoOfPodsToEvictPerNode))
-					}
-				}
-			}
-			if yyr2 || yy2arr2 {
-				r.WriteArrayEnd()
-			} else {
-				r.WriteMapEnd()
-			}
-		}
-	}
-}
-
-func (x *DeschedulerConfiguration) CodecDecodeSelf(d *codec1978.Decoder) {
-	var h codecSelfer1234
-	z, r := codec1978.GenHelperDecoder(d)
-	_, _, _ = h, z, r
-	yym1 := z.DecBinary()
-	_ = yym1
-	if false {
-	} else if yyxt1 := z.Extension(z.I2Rtid(x)); yyxt1 != nil {
-		z.DecExtension(x, yyxt1)
-	} else {
-		yyct2 := r.ContainerType()
-		if yyct2 == codecSelferValueTypeMap1234 {
-			yyl2 := r.ReadMapStart()
-			if yyl2 == 0 {
-				r.ReadMapEnd()
-			} else {
-				x.codecDecodeSelfFromMap(yyl2, d)
-			}
-		} else if yyct2 == codecSelferValueTypeArray1234 {
-			yyl2 := r.ReadArrayStart()
-			if yyl2 == 0 {
-				r.ReadArrayEnd()
-			} else {
-				x.codecDecodeSelfFromArray(yyl2, d)
-			}
-		} else {
-			panic(errCodecSelferOnlyMapOrArrayEncodeToStruct1234)
-		}
-	}
-}
-
-func (x *DeschedulerConfiguration) codecDecodeSelfFromMap(l int, d *codec1978.Decoder) {
-	var h codecSelfer1234
-	z, r := codec1978.GenHelperDecoder(d)
-	_, _, _ = h, z, r
-	var yyhl3 bool = l >= 0
-	for yyj3 := 0; ; yyj3++ {
-		if yyhl3 {
-			if yyj3 >= l {
-				break
-			}
-		} else {
-			if r.CheckBreak() {
-				break
-			}
-		}
-		r.ReadMapElemKey()
-		yys3 := z.StringView(r.DecStructFieldKey(codecSelferValueTypeString1234, z.DecScratchArrayBuffer()))
-		r.ReadMapElemValue()
-		switch yys3 {
-		case "kind":
-			if r.TryDecodeAsNil() {
-				x.Kind = ""
-			} else {
-				yyv4 := &x.Kind
-				yym5 := z.DecBinary()
-				_ = yym5
-				if false {
-				} else {
-					*((*string)(yyv4)) = r.DecodeString()
-				}
-			}
-		case "apiVersion":
-			if r.TryDecodeAsNil() {
-				x.APIVersion = ""
-			} else {
-				yyv6 := &x.APIVersion
-				yym7 := z.DecBinary()
-				_ = yym7
-				if false {
-				} else {
-					*((*string)(yyv6)) = r.DecodeString()
-				}
-			}
-		case "deschedulingInterval":
-			if r.TryDecodeAsNil() {
-				x.DeschedulingInterval = 0
-			} else {
-				yyv8 := &x.DeschedulingInterval
-				yym9 := z.DecBinary()
-				_ = yym9
-				if false {
-				} else if yyxt9 := z.Extension(z.I2Rtid(yyv8)); yyxt9 != nil {
-					z.DecExtension(yyv8, yyxt9)
-				} else {
-					*((*int64)(yyv8)) = int64(r.DecodeInt(64))
-				}
-			}
-		case "kubeconfigFile":
-			if r.TryDecodeAsNil() {
-				x.KubeconfigFile = ""
-			} else {
-				yyv10 := &x.KubeconfigFile
-				yym11 := z.DecBinary()
-				_ = yym11
-				if false {
-				} else {
-					*((*string)(yyv10)) = r.DecodeString()
-				}
-			}
-		case "policyConfigFile":
-			if r.TryDecodeAsNil() {
-				x.PolicyConfigFile = ""
-			} else {
-				yyv12 := &x.PolicyConfigFile
-				yym13 := z.DecBinary()
-				_ = yym13
-				if false {
-				} else {
-					*((*string)(yyv12)) = r.DecodeString()
-				}
-			}
-		case "dryRun":
-			if r.TryDecodeAsNil() {
-				x.DryRun = false
-			} else {
-				yyv14 := &x.DryRun
-				yym15 := z.DecBinary()
-				_ = yym15
-				if false {
-				} else {
-					*((*bool)(yyv14)) = r.DecodeBool()
-				}
-			}
-		case "nodeSelector":
-			if r.TryDecodeAsNil() {
-				x.NodeSelector = ""
-			} else {
-				yyv16 := &x.NodeSelector
-				yym17 := z.DecBinary()
-				_ = yym17
-				if false {
-				} else {
-					*((*string)(yyv16)) = r.DecodeString()
-				}
-			}
-		case "maxNoOfPodsToEvictPerNode":
-			if r.TryDecodeAsNil() {
-				x.MaxNoOfPodsToEvictPerNode = 0
-			} else {
-				yyv18 := &x.MaxNoOfPodsToEvictPerNode
-				yym19 := z.DecBinary()
-				_ = yym19
-				if false {
-				} else {
-					*((*int)(yyv18)) = int(r.DecodeInt(codecSelferBitsize1234))
-				}
-			}
-		default:
-			z.DecStructFieldNotFound(-1, yys3)
-		} // end switch yys3
-	} // end for yyj3
-	r.ReadMapEnd()
-}
-
-func (x *DeschedulerConfiguration) codecDecodeSelfFromArray(l int, d *codec1978.Decoder) {
-	var h codecSelfer1234
-	z, r := codec1978.GenHelperDecoder(d)
-	_, _, _ = h, z, r
-	var yyj20 int
-	var yyb20 bool
-	var yyhl20 bool = l >= 0
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.Kind = ""
-	} else {
-		yyv21 := &x.Kind
-		yym22 := z.DecBinary()
-		_ = yym22
-		if false {
-		} else {
-			*((*string)(yyv21)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.APIVersion = ""
-	} else {
-		yyv23 := &x.APIVersion
-		yym24 := z.DecBinary()
-		_ = yym24
-		if false {
-		} else {
-			*((*string)(yyv23)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.DeschedulingInterval = 0
-	} else {
-		yyv25 := &x.DeschedulingInterval
-		yym26 := z.DecBinary()
-		_ = yym26
-		if false {
-		} else if yyxt26 := z.Extension(z.I2Rtid(yyv25)); yyxt26 != nil {
-			z.DecExtension(yyv25, yyxt26)
-		} else {
-			*((*int64)(yyv25)) = int64(r.DecodeInt(64))
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.KubeconfigFile = ""
-	} else {
-		yyv27 := &x.KubeconfigFile
-		yym28 := z.DecBinary()
-		_ = yym28
-		if false {
-		} else {
-			*((*string)(yyv27)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.PolicyConfigFile = ""
-	} else {
-		yyv29 := &x.PolicyConfigFile
-		yym30 := z.DecBinary()
-		_ = yym30
-		if false {
-		} else {
-			*((*string)(yyv29)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.DryRun = false
-	} else {
-		yyv31 := &x.DryRun
-		yym32 := z.DecBinary()
-		_ = yym32
-		if false {
-		} else {
-			*((*bool)(yyv31)) = r.DecodeBool()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.NodeSelector = ""
-	} else {
-		yyv33 := &x.NodeSelector
-		yym34 := z.DecBinary()
-		_ = yym34
-		if false {
-		} else {
-			*((*string)(yyv33)) = r.DecodeString()
-		}
-	}
-	yyj20++
-	if yyhl20 {
-		yyb20 = yyj20 > l
-	} else {
-		yyb20 = r.CheckBreak()
-	}
-	if yyb20 {
-		r.ReadArrayEnd()
-		return
-	}
-	r.ReadArrayElem()
-	if r.TryDecodeAsNil() {
-		x.MaxNoOfPodsToEvictPerNode = 0
-	} else {
-		yyv35 := &x.MaxNoOfPodsToEvictPerNode
-		yym36 := z.DecBinary()
-		_ = yym36
-		if false {
-		} else {
-			*((*int)(yyv35)) = int(r.DecodeInt(codecSelferBitsize1234))
-		}
-	}
-	for {
-		yyj20++
-		if yyhl20 {
-			yyb20 = yyj20 > l
-		} else {
-			yyb20 = r.CheckBreak()
-		}
-		if yyb20 {
-			break
-		}
-		r.ReadArrayElem()
-		z.DecStructFieldNotFound(yyj20-1, "")
-	}
-	r.ReadArrayEnd()
-}

pkg/apis/componentconfig/v1alpha1/types.go

@@ -45,4 +45,7 @@ type DeschedulerConfiguration struct {
 
 	// MaxNoOfPodsToEvictPerNode restricts maximum of pods to be evicted per node.
 	MaxNoOfPodsToEvictPerNode int `json:"maxNoOfPodsToEvictPerNode,omitempty"`
+
+	// EvictLocalStoragePods allows pods using local storage to be evicted.
+	EvictLocalStoragePods bool `json:"evictLocalStoragePods,omitempty"`
 }

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

@@ -1,7 +1,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2018 The Kubernetes Authors.
+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.
@@ -16,16 +16,16 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by conversion-gen. Do not edit it manually!
+// Code generated by conversion-gen. DO NOT EDIT.
 
 package v1alpha1
 
 import (
 	time "time"
 
-	componentconfig "github.com/kubernetes-incubator/descheduler/pkg/apis/componentconfig"
 	conversion "k8s.io/apimachinery/pkg/conversion"
 	runtime "k8s.io/apimachinery/pkg/runtime"
+	componentconfig "sigs.k8s.io/descheduler/pkg/apis/componentconfig"
 )
 
 func init() {
@@ -34,11 +34,18 @@ func init() {
 
 // RegisterConversions adds conversion functions to the given scheme.
 // Public to allow building arbitrary schemes.
-func RegisterConversions(scheme *runtime.Scheme) error {
-	return scheme.AddGeneratedConversionFuncs(
-		Convert_v1alpha1_DeschedulerConfiguration_To_componentconfig_DeschedulerConfiguration,
-		Convert_componentconfig_DeschedulerConfiguration_To_v1alpha1_DeschedulerConfiguration,
-	)
+func RegisterConversions(s *runtime.Scheme) error {
+	if err := s.AddGeneratedConversionFunc((*DeschedulerConfiguration)(nil), (*componentconfig.DeschedulerConfiguration)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_v1alpha1_DeschedulerConfiguration_To_componentconfig_DeschedulerConfiguration(a.(*DeschedulerConfiguration), b.(*componentconfig.DeschedulerConfiguration), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*componentconfig.DeschedulerConfiguration)(nil), (*DeschedulerConfiguration)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_componentconfig_DeschedulerConfiguration_To_v1alpha1_DeschedulerConfiguration(a.(*componentconfig.DeschedulerConfiguration), b.(*DeschedulerConfiguration), scope)
+	}); err != nil {
+		return err
+	}
+	return nil
 }
 
 func autoConvert_v1alpha1_DeschedulerConfiguration_To_componentconfig_DeschedulerConfiguration(in *DeschedulerConfiguration, out *componentconfig.DeschedulerConfiguration, s conversion.Scope) error {
@@ -48,6 +55,7 @@ func autoConvert_v1alpha1_DeschedulerConfiguration_To_componentconfig_Deschedule
 	out.DryRun = in.DryRun
 	out.NodeSelector = in.NodeSelector
 	out.MaxNoOfPodsToEvictPerNode = in.MaxNoOfPodsToEvictPerNode
+	out.EvictLocalStoragePods = in.EvictLocalStoragePods
 	return nil
 }
 
@@ -63,6 +71,7 @@ func autoConvert_componentconfig_DeschedulerConfiguration_To_v1alpha1_Deschedule
 	out.DryRun = in.DryRun
 	out.NodeSelector = in.NodeSelector
 	out.MaxNoOfPodsToEvictPerNode = in.MaxNoOfPodsToEvictPerNode
+	out.EvictLocalStoragePods = in.EvictLocalStoragePods
 	return nil
 }
 

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

@@ -1,7 +1,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2018 The Kubernetes Authors.
+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.
@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by deepcopy-gen. Do not edit it manually!
+// Code generated by deepcopy-gen. DO NOT EDIT.
 
 package v1alpha1
 
@@ -45,7 +45,6 @@ func (in *DeschedulerConfiguration) DeepCopy() *DeschedulerConfiguration {
 func (in *DeschedulerConfiguration) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }

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

@@ -1,7 +1,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2018 The Kubernetes Authors.
+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.
@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by defaulter-gen. Do not edit it manually!
+// Code generated by defaulter-gen. DO NOT EDIT.
 
 package v1alpha1
 

pkg/apis/componentconfig/zz_generated.deepcopy.go

@@ -1,7 +1,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2018 The Kubernetes Authors.
+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.
@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by deepcopy-gen. Do not edit it manually!
+// Code generated by deepcopy-gen. DO NOT EDIT.
 
 package componentconfig
 
@@ -45,7 +45,6 @@ func (in *DeschedulerConfiguration) DeepCopy() *DeschedulerConfiguration {
 func (in *DeschedulerConfiguration) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }

pkg/descheduler/client/client.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 
 	clientset "k8s.io/client-go/kubernetes"
+	// Ensure to load all auth plugins.
 	_ "k8s.io/client-go/plugin/pkg/client/auth"
 	"k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/clientcmd"

pkg/descheduler/descheduler.go

@@ -17,19 +17,26 @@ limitations under the License.
 package descheduler
 
 import (
+	"context"
 	"fmt"
 
-	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/klog/v2"
 
-	"github.com/kubernetes-incubator/descheduler/cmd/descheduler/app/options"
-	"github.com/kubernetes-incubator/descheduler/pkg/descheduler/client"
-	eutils "github.com/kubernetes-incubator/descheduler/pkg/descheduler/evictions/utils"
-	nodeutil "github.com/kubernetes-incubator/descheduler/pkg/descheduler/node"
-	"github.com/kubernetes-incubator/descheduler/pkg/descheduler/strategies"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/client-go/informers"
+	"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/client"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
+	nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
+	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
 )
 
 func Run(rs *options.DeschedulerServer) error {
-
+	ctx := context.Background()
 	rsclient, err := client.CreateClient(rs.KubeconfigFile)
 	if err != nil {
 		return err
@@ -50,21 +57,62 @@ func Run(rs *options.DeschedulerServer) error {
 	}
 
 	stopChannel := make(chan struct{})
-	nodes, err := nodeutil.ReadyNodes(rs.Client, rs.NodeSelector, stopChannel)
-	if err != nil {
-		return err
+	return RunDeschedulerStrategies(ctx, rs, deschedulerPolicy, evictionPolicyGroupVersion, stopChannel)
+}
+
+type strategyFunction func(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor)
+
+func RunDeschedulerStrategies(ctx context.Context, rs *options.DeschedulerServer, deschedulerPolicy *api.DeschedulerPolicy, evictionPolicyGroupVersion string, stopChannel chan struct{}) error {
+	sharedInformerFactory := informers.NewSharedInformerFactory(rs.Client, 0)
+	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
+
+	sharedInformerFactory.Start(stopChannel)
+	sharedInformerFactory.WaitForCacheSync(stopChannel)
+
+	strategyFuncs := map[string]strategyFunction{
+		"RemoveDuplicates":                        strategies.RemoveDuplicatePods,
+		"LowNodeUtilization":                      strategies.LowNodeUtilization,
+		"RemovePodsViolatingInterPodAntiAffinity": strategies.RemovePodsViolatingInterPodAntiAffinity,
+		"RemovePodsViolatingNodeAffinity":         strategies.RemovePodsViolatingNodeAffinity,
+		"RemovePodsViolatingNodeTaints":           strategies.RemovePodsViolatingNodeTaints,
+		"RemovePodsHavingTooManyRestarts":         strategies.RemovePodsHavingTooManyRestarts,
+		"PodLifeTime":                             strategies.PodLifeTime,
 	}
 
-	if len(nodes) <= 1 {
-		glog.V(1).Infof("The cluster size is 0 or 1 meaning eviction causes service disruption or degradation. So aborting..")
-		return nil
-	}
+	wait.Until(func() {
+		nodes, err := nodeutil.ReadyNodes(ctx, rs.Client, nodeInformer, rs.NodeSelector, stopChannel)
+		if err != nil {
+			klog.V(1).Infof("Unable to get ready nodes: %v", err)
+			close(stopChannel)
+			return
+		}
 
-	nodePodCount := strategies.InitializeNodePodCount(nodes)
-	strategies.RemoveDuplicatePods(rs, deschedulerPolicy.Strategies["RemoveDuplicates"], evictionPolicyGroupVersion, nodes, nodePodCount)
-	strategies.LowNodeUtilization(rs, deschedulerPolicy.Strategies["LowNodeUtilization"], evictionPolicyGroupVersion, nodes, nodePodCount)
-	strategies.RemovePodsViolatingInterPodAntiAffinity(rs, deschedulerPolicy.Strategies["RemovePodsViolatingInterPodAntiAffinity"], evictionPolicyGroupVersion, nodes, nodePodCount)
-	strategies.RemovePodsViolatingNodeAffinity(rs, deschedulerPolicy.Strategies["RemovePodsViolatingNodeAffinity"], evictionPolicyGroupVersion, nodes, nodePodCount)
+		if len(nodes) <= 1 {
+			klog.V(1).Infof("The cluster size is 0 or 1 meaning eviction causes service disruption or degradation. So aborting..")
+			close(stopChannel)
+			return
+		}
+
+		podEvictor := evictions.NewPodEvictor(
+			rs.Client,
+			evictionPolicyGroupVersion,
+			rs.DryRun,
+			rs.MaxNoOfPodsToEvictPerNode,
+			nodes,
+			rs.EvictLocalStoragePods,
+		)
+
+		for name, f := range strategyFuncs {
+			if strategy := deschedulerPolicy.Strategies[api.StrategyName(name)]; strategy.Enabled {
+				f(ctx, rs.Client, strategy, nodes, podEvictor)
+			}
+		}
+
+		// If there was no interval specified, send a signal to the stopChannel to end the wait.Until loop after 1 iteration
+		if rs.DeschedulingInterval.Seconds() == 0 {
+			close(stopChannel)
+		}
+	}, rs.DeschedulingInterval, stopChannel)
 
 	return nil
 }

pkg/descheduler/descheduler_test.go

@@ -0,0 +1,94 @@
+package descheduler
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/wait"
+	fakeclientset "k8s.io/client-go/kubernetes/fake"
+	"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/test"
+)
+
+func TestTaintsUpdated(t *testing.T) {
+	ctx := context.Background()
+	n1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
+	n2 := test.BuildTestNode("n2", 2000, 3000, 10, nil)
+
+	p1 := test.BuildTestPod(fmt.Sprintf("pod_1_%s", n1.Name), 200, 0, n1.Name, nil)
+	p1.ObjectMeta.OwnerReferences = []metav1.OwnerReference{
+		{},
+	}
+
+	client := fakeclientset.NewSimpleClientset(n1, n2, p1)
+	dp := &api.DeschedulerPolicy{
+		Strategies: api.StrategyList{
+			"RemovePodsViolatingNodeTaints": api.DeschedulerStrategy{
+				Enabled: true,
+			},
+		},
+	}
+
+	stopChannel := make(chan struct{})
+	defer close(stopChannel)
+
+	rs := options.NewDeschedulerServer()
+	rs.Client = client
+	rs.DeschedulingInterval = 100 * time.Millisecond
+	go func() {
+		err := RunDeschedulerStrategies(ctx, rs, dp, "v1beta1", stopChannel)
+		if err != nil {
+			t.Fatalf("Unable to run descheduler strategies: %v", err)
+		}
+	}()
+
+	// Wait for few cycles and then verify the only pod still exists
+	time.Sleep(300 * time.Millisecond)
+	pods, err := client.CoreV1().Pods(p1.Namespace).List(ctx, metav1.ListOptions{})
+	if err != nil {
+		t.Errorf("Unable to list pods: %v", err)
+	}
+	if len(pods.Items) < 1 {
+		t.Errorf("The pod was evicted before a node was tained")
+	}
+
+	n1WithTaint := n1.DeepCopy()
+	n1WithTaint.Spec.Taints = []v1.Taint{
+		{
+			Key:    "key",
+			Value:  "value",
+			Effect: v1.TaintEffectNoSchedule,
+		},
+	}
+
+	if _, err := client.CoreV1().Nodes().Update(ctx, n1WithTaint, metav1.UpdateOptions{}); err != nil {
+		t.Fatalf("Unable to update node: %v\n", err)
+	}
+
+	if err := wait.PollImmediate(100*time.Millisecond, time.Second, func() (bool, error) {
+		// Get over evicted pod result in panic
+		//pods, err := client.CoreV1().Pods(p1.Namespace).Get(p1.Name, metav1.GetOptions{})
+		// List is better, it does not panic.
+		// Though once the pod is evicted, List starts to error with "can't assign or convert v1beta1.Eviction into v1.Pod"
+		pods, err := client.CoreV1().Pods(p1.Namespace).List(ctx, metav1.ListOptions{})
+		if err == nil {
+			if len(pods.Items) > 0 {
+				return false, nil
+			}
+			return true, nil
+		}
+		if strings.Contains(err.Error(), "can't assign or convert v1beta1.Eviction into v1.Pod") {
+			return true, nil
+		}
+
+		return false, nil
+	}); err != nil {
+		t.Fatalf("Unable to evict pod, node taint did not get propagated to descheduler strategies")
+	}
+}

pkg/descheduler/evictions/evictions.go

@@ -17,20 +17,147 @@ limitations under the License.
 package evictions
 
 import (
+	"context"
 	"fmt"
+	"strings"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	policy "k8s.io/api/policy/v1beta1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/errors"
 	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/kubernetes/scheme"
+	clientcorev1 "k8s.io/client-go/kubernetes/typed/core/v1"
+	"k8s.io/client-go/tools/record"
+	"k8s.io/klog/v2"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/utils"
 
-	eutils "github.com/kubernetes-incubator/descheduler/pkg/descheduler/evictions/utils"
+	eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
 )
 
-func EvictPod(client clientset.Interface, pod *v1.Pod, policyGroupVersion string, dryRun bool) (bool, error) {
+const (
+	evictPodAnnotationKey = "descheduler.alpha.kubernetes.io/evict"
+)
+
+// nodePodEvictedCount keeps count of pods evicted on node
+type nodePodEvictedCount map[*v1.Node]int
+
+type PodEvictor struct {
+	client                clientset.Interface
+	policyGroupVersion    string
+	dryRun                bool
+	maxPodsToEvictPerNode int
+	nodepodCount          nodePodEvictedCount
+	evictLocalStoragePods bool
+}
+
+func NewPodEvictor(
+	client clientset.Interface,
+	policyGroupVersion string,
+	dryRun bool,
+	maxPodsToEvictPerNode int,
+	nodes []*v1.Node,
+	evictLocalStoragePods bool,
+) *PodEvictor {
+	var nodePodCount = make(nodePodEvictedCount)
+	for _, node := range nodes {
+		// Initialize podsEvicted till now with 0.
+		nodePodCount[node] = 0
+	}
+
+	return &PodEvictor{
+		client:                client,
+		policyGroupVersion:    policyGroupVersion,
+		dryRun:                dryRun,
+		maxPodsToEvictPerNode: maxPodsToEvictPerNode,
+		nodepodCount:          nodePodCount,
+		evictLocalStoragePods: evictLocalStoragePods,
+	}
+}
+
+// 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]
+}
+
+// TotalEvicted gives a number of pods evicted through all nodes
+func (pe *PodEvictor) TotalEvicted() int {
+	var total int
+	for _, count := range pe.nodepodCount {
+		total += count
+	}
+	return total
+}
+
+// EvictPod returns non-nil error only when evicting a pod on a node is not
+// possible (due to maxPodsToEvictPerNode constraint). Success is true when the pod
+// is evicted on the server side.
+func (pe *PodEvictor) EvictPod(ctx context.Context, pod *v1.Pod, node *v1.Node, reasons ...string) (bool, error) {
+	var reason string
+	if len(reasons) > 0 {
+		reason = " (" + strings.Join(reasons, ", ") + ")"
+	}
+	if pe.maxPodsToEvictPerNode > 0 && pe.nodepodCount[node]+1 > pe.maxPodsToEvictPerNode {
+		return false, fmt.Errorf("Maximum number %v of evicted pods per %q node reached", pe.maxPodsToEvictPerNode, node.Name)
+	}
+
+	err := evictPod(ctx, pe.client, pod, pe.policyGroupVersion, pe.dryRun)
+	if 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)
+		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)
+	} else {
+		klog.V(1).Infof("Evicted pod: %#v in namespace %#v%s", pod.Name, pod.Namespace, reason)
+		eventBroadcaster := record.NewBroadcaster()
+		eventBroadcaster.StartLogging(klog.V(3).Infof)
+		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))
+	}
+	return true, nil
+}
+
+func evictPod(ctx context.Context, client clientset.Interface, pod *v1.Pod, policyGroupVersion string, dryRun bool) error {
 	if dryRun {
-		return true, nil
+		return nil
 	}
 	deleteOptions := &metav1.DeleteOptions{}
 	// GracePeriodSeconds ?
@@ -45,15 +172,47 @@ func EvictPod(client clientset.Interface, pod *v1.Pod, policyGroupVersion string
 		},
 		DeleteOptions: deleteOptions,
 	}
-	err := client.Policy().Evictions(eviction.Namespace).Evict(eviction)
+	err := client.PolicyV1beta1().Evictions(eviction.Namespace).Evict(ctx, eviction)
 
-	if err == nil {
-		return true, nil
-	} else if apierrors.IsTooManyRequests(err) {
-		return false, fmt.Errorf("error when evicting pod (ignoring) %q: %v", pod.Name, err)
-	} else if apierrors.IsNotFound(err) {
-		return true, fmt.Errorf("pod not found when evicting %q: %v", pod.Name, err)
-	} else {
-		return false, err
+	if apierrors.IsTooManyRequests(err) {
+		return fmt.Errorf("error when evicting pod (ignoring) %q: %v", pod.Name, err)
 	}
+	if apierrors.IsNotFound(err) {
+		return fmt.Errorf("pod not found when evicting %q: %v", pod.Name, err)
+	}
+	return err
+}
+
+func IsCriticalPod(pod *v1.Pod) bool {
+	return utils.IsCriticalPod(pod)
+}
+
+func IsDaemonsetPod(ownerRefList []metav1.OwnerReference) bool {
+	for _, ownerRef := range ownerRefList {
+		if ownerRef.Kind == "DaemonSet" {
+			return true
+		}
+	}
+	return false
+}
+
+// IsMirrorPod checks whether the pod is a mirror pod.
+func IsMirrorPod(pod *v1.Pod) bool {
+	return utils.IsMirrorPod(pod)
+}
+
+// HaveEvictAnnotation checks if the pod have evict annotation
+func HaveEvictAnnotation(pod *v1.Pod) bool {
+	_, found := pod.ObjectMeta.Annotations[evictPodAnnotationKey]
+	return found
+}
+
+func IsPodWithLocalStorage(pod *v1.Pod) bool {
+	for _, volume := range pod.Spec.Volumes {
+		if volume.HostPath != nil || volume.EmptyDir != nil {
+			return true
+		}
+	}
+
+	return false
 }

pkg/descheduler/evictions/evictions_test.go

@@ -17,24 +17,268 @@ limitations under the License.
 package evictions
 
 import (
-	"github.com/kubernetes-incubator/descheduler/test"
-	"k8s.io/api/core/v1"
+	"context"
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
-	"testing"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/utils"
+	"sigs.k8s.io/descheduler/test"
 )
 
 func TestEvictPod(t *testing.T) {
-	n1 := test.BuildTestNode("node1", 1000, 2000, 9)
-	p1 := test.BuildTestPod("p1", 400, 0, n1.Name)
-	fakeClient := &fake.Clientset{}
-	fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-		return true, &v1.PodList{Items: []v1.Pod{*p1}}, nil
-	})
-	evicted, _ := EvictPod(fakeClient, p1, "v1", false)
-	if !evicted {
-		t.Errorf("Expected %v pod to be evicted", p1.Name)
+	ctx := context.Background()
+	node1 := test.BuildTestNode("node1", 1000, 2000, 9, nil)
+	pod1 := test.BuildTestPod("p1", 400, 0, "node1", nil)
+	tests := []struct {
+		description string
+		node        *v1.Node
+		pod         *v1.Pod
+		pods        []v1.Pod
+		want        error
+	}{
+		{
+			description: "test pod eviction - pod present",
+			node:        node1,
+			pod:         pod1,
+			pods:        []v1.Pod{*pod1},
+			want:        nil,
+		},
+		{
+			description: "test pod eviction - pod absent",
+			node:        node1,
+			pod:         pod1,
+			pods:        []v1.Pod{*test.BuildTestPod("p2", 400, 0, "node1", nil), *test.BuildTestPod("p3", 450, 0, "node1", nil)},
+			want:        nil,
+		},
+	}
+
+	for _, test := range tests {
+		fakeClient := &fake.Clientset{}
+		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
+			return true, &v1.PodList{Items: test.pods}, nil
+		})
+		got := evictPod(ctx, fakeClient, test.pod, "v1", false)
+		if got != test.want {
+			t.Errorf("Test error for Desc: %s. Expected %v pod eviction to be %v, got %v", test.description, test.pod.Name, test.want, got)
+		}
+	}
+}
+
+func TestIsEvictable(t *testing.T) {
+	n1 := test.BuildTestNode("node1", 1000, 2000, 13, nil)
+	type testCase struct {
+		pod                   *v1.Pod
+		runBefore             func(*v1.Pod)
+		evictLocalStoragePods bool
+		result                bool
+	}
+
+	testCases := []testCase{
+		{
+			pod: test.BuildTestPod("p1", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+			},
+			evictLocalStoragePods: false,
+			result:                true,
+		}, {
+			pod: test.BuildTestPod("p2", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+			},
+			evictLocalStoragePods: false,
+			result:                true,
+		}, {
+			pod: test.BuildTestPod("p3", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
+			},
+			evictLocalStoragePods: false,
+			result:                true,
+		}, {
+			pod: test.BuildTestPod("p4", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
+				pod.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
+			},
+			evictLocalStoragePods: false,
+			result:                true,
+		}, {
+			pod: test.BuildTestPod("p5", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+				pod.Spec.Volumes = []v1.Volume{
+					{
+						Name: "sample",
+						VolumeSource: v1.VolumeSource{
+							HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+							EmptyDir: &v1.EmptyDirVolumeSource{
+								SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+						},
+					},
+				}
+			},
+			evictLocalStoragePods: false,
+			result:                false,
+		}, {
+			pod: test.BuildTestPod("p6", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+				pod.Spec.Volumes = []v1.Volume{
+					{
+						Name: "sample",
+						VolumeSource: v1.VolumeSource{
+							HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+							EmptyDir: &v1.EmptyDirVolumeSource{
+								SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+						},
+					},
+				}
+			},
+			evictLocalStoragePods: true,
+			result:                true,
+		}, {
+			pod: test.BuildTestPod("p7", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
+				pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+				pod.Spec.Volumes = []v1.Volume{
+					{
+						Name: "sample",
+						VolumeSource: v1.VolumeSource{
+							HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+							EmptyDir: &v1.EmptyDirVolumeSource{
+								SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+						},
+					},
+				}
+			},
+			evictLocalStoragePods: false,
+			result:                true,
+		}, {
+			pod: test.BuildTestPod("p8", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
+			},
+			evictLocalStoragePods: false,
+			result:                false,
+		}, {
+			pod: test.BuildTestPod("p9", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
+				pod.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
+			},
+			evictLocalStoragePods: false,
+			result:                true,
+		}, {
+			pod: test.BuildTestPod("p10", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.Annotations = test.GetMirrorPodAnnotation()
+			},
+			evictLocalStoragePods: false,
+			result:                false,
+		}, {
+			pod: test.BuildTestPod("p11", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				pod.Annotations = test.GetMirrorPodAnnotation()
+				pod.Annotations["descheduler.alpha.kubernetes.io/evict"] = "true"
+			},
+			evictLocalStoragePods: false,
+			result:                true,
+		}, {
+			pod: test.BuildTestPod("p12", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				priority := utils.SystemCriticalPriority
+				pod.Spec.Priority = &priority
+			},
+			evictLocalStoragePods: false,
+			result:                false,
+		}, {
+			pod: test.BuildTestPod("p13", 400, 0, n1.Name, nil),
+			runBefore: func(pod *v1.Pod) {
+				priority := utils.SystemCriticalPriority
+				pod.Spec.Priority = &priority
+				pod.Annotations = map[string]string{
+					"descheduler.alpha.kubernetes.io/evict": "true",
+				}
+			},
+			evictLocalStoragePods: false,
+			result:                true,
+		},
+	}
+
+	for _, test := range testCases {
+		test.runBefore(test.pod)
+		podEvictor := &PodEvictor{
+			evictLocalStoragePods: test.evictLocalStoragePods,
+		}
+		result := podEvictor.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)
+		}
+
+	}
+}
+func TestPodTypes(t *testing.T) {
+	n1 := test.BuildTestNode("node1", 1000, 2000, 9, nil)
+	p1 := test.BuildTestPod("p1", 400, 0, n1.Name, nil)
+
+	// These won't be evicted.
+	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.
+	// A daemonset.
+	//p2.Annotations = test.GetDaemonSetAnnotation()
+	p2.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
+	// A pod with local storage.
+	p3.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+	p3.Spec.Volumes = []v1.Volume{
+		{
+			Name: "sample",
+			VolumeSource: v1.VolumeSource{
+				HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+				EmptyDir: &v1.EmptyDirVolumeSource{
+					SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+			},
+		},
+	}
+	// A Mirror Pod.
+	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.")
+	}
+	ownerRefList := podutil.OwnerRef(p2)
+	if !IsDaemonsetPod(ownerRefList) {
+		t.Errorf("Expected p2 to be a daemonset pod.")
+	}
+	ownerRefList = podutil.OwnerRef(p1)
+	if IsDaemonsetPod(ownerRefList) || IsPodWithLocalStorage(p1) || IsCriticalPod(p1) || IsMirrorPod(p1) {
+		t.Errorf("Expected p1 to be a normal pod.")
 	}
 
 }

pkg/descheduler/node/node.go

@@ -17,40 +17,34 @@ limitations under the License.
 package node
 
 import (
-	"time"
-
-	"github.com/golang/glog"
-	"github.com/kubernetes-incubator/descheduler/pkg/utils"
+	"context"
 	"k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/labels"
+	coreinformers "k8s.io/client-go/informers/core/v1"
 	clientset "k8s.io/client-go/kubernetes"
-	corelisters "k8s.io/client-go/listers/core/v1"
-	"k8s.io/client-go/tools/cache"
+	"k8s.io/klog/v2"
+	"sigs.k8s.io/descheduler/pkg/utils"
 )
 
 // ReadyNodes returns ready nodes irrespective of whether they are
 // schedulable or not.
-func ReadyNodes(client clientset.Interface, nodeSelector string, stopChannel <-chan struct{}) ([]*v1.Node, error) {
+func ReadyNodes(ctx context.Context, client clientset.Interface, nodeInformer coreinformers.NodeInformer, nodeSelector string, stopChannel <-chan struct{}) ([]*v1.Node, error) {
 	ns, err := labels.Parse(nodeSelector)
 	if err != nil {
 		return []*v1.Node{}, err
 	}
 
 	var nodes []*v1.Node
-	nl := GetNodeLister(client, stopChannel)
-	if nl != nil {
-		// err is defined above
-		if nodes, err = nl.List(ns); err != nil {
-			return []*v1.Node{}, err
-		}
+	// err is defined above
+	if nodes, err = nodeInformer.Lister().List(ns); err != nil {
+		return []*v1.Node{}, err
 	}
 
 	if len(nodes) == 0 {
-		glog.V(2).Infof("node lister returned empty list, now fetch directly")
+		klog.V(2).Infof("node lister returned empty list, now fetch directly")
 
-		nItems, err := client.Core().Nodes().List(metav1.ListOptions{LabelSelector: nodeSelector})
+		nItems, err := client.CoreV1().Nodes().List(ctx, metav1.ListOptions{LabelSelector: nodeSelector})
 		if err != nil {
 			return []*v1.Node{}, err
 		}
@@ -74,22 +68,6 @@ func ReadyNodes(client clientset.Interface, nodeSelector string, stopChannel <-c
 	return readyNodes, nil
 }
 
-func GetNodeLister(client clientset.Interface, stopChannel <-chan struct{}) corelisters.NodeLister {
-	if stopChannel == nil {
-		return nil
-	}
-	listWatcher := cache.NewListWatchFromClient(client.Core().RESTClient(), "nodes", v1.NamespaceAll, fields.Everything())
-	store := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
-	nodeLister := corelisters.NewNodeLister(store)
-	reflector := cache.NewReflector(listWatcher, &v1.Node{}, store, time.Hour)
-	go reflector.Run(stopChannel)
-
-	// To give some time so that listing works, chosen randomly
-	time.Sleep(100 * time.Millisecond)
-
-	return nodeLister
-}
-
 // IsReady checks if the descheduler could run against given node.
 func IsReady(node *v1.Node) bool {
 	for i := range node.Status.Conditions {
@@ -99,31 +77,28 @@ 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 {
-			glog.V(1).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
+			klog.V(1).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
 			return false
 		} /*else if cond.Type == v1.NodeOutOfDisk && cond.Status != v1.ConditionFalse {
-			glog.V(4).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
+			klog.V(4).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
 			return false
 		} else if cond.Type == v1.NodeNetworkUnavailable && cond.Status != v1.ConditionFalse {
-			glog.V(4).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
+			klog.V(4).Infof("Ignoring node %v with %v condition status %v", node.Name, cond.Type, cond.Status)
 			return false
 		}*/
 	}
 	// Ignore nodes that are marked unschedulable
 	/*if node.Spec.Unschedulable {
-		glog.V(4).Infof("Ignoring node %v since it is unschedulable", node.Name)
+		klog.V(4).Infof("Ignoring node %v since it is unschedulable", node.Name)
 		return false
 	}*/
 	return true
 }
 
-// IsNodeUschedulable checks if the node is unschedulable. This is helper function to check only in case of
+// IsNodeUnschedulable checks if the node is unschedulable. This is helper function to check only in case of
 // underutilized node so that they won't be accounted for.
-func IsNodeUschedulable(node *v1.Node) bool {
-	if node.Spec.Unschedulable {
-		return true
-	}
-	return false
+func IsNodeUnschedulable(node *v1.Node) bool {
+	return node.Spec.Unschedulable
 }
 
 // PodFitsAnyNode checks if the given pod fits any of the given nodes, based on
@@ -136,12 +111,9 @@ func PodFitsAnyNode(pod *v1.Pod, nodes []*v1.Node) bool {
 		if err != nil || !ok {
 			continue
 		}
-		if ok {
-			if !IsNodeUschedulable(node) {
-				glog.V(2).Infof("Pod %v can possibly be scheduled on %v", pod.Name, node.Name)
-				return true
-			}
-			return false
+		if !IsNodeUnschedulable(node) {
+			klog.V(2).Infof("Pod %v can possibly be scheduled on %v", pod.Name, node.Name)
+			return true
 		}
 	}
 	return false
@@ -153,15 +125,15 @@ func PodFitsCurrentNode(pod *v1.Pod, node *v1.Node) bool {
 	ok, err := utils.PodMatchNodeSelector(pod, node)
 
 	if err != nil {
-		glog.Error(err)
+		klog.Error(err)
 		return false
 	}
 
 	if !ok {
-		glog.V(1).Infof("Pod %v does not fit on node %v", pod.Name, node.Name)
+		klog.V(2).Infof("Pod %v does not fit on node %v", pod.Name, node.Name)
 		return false
 	}
 
-	glog.V(3).Infof("Pod %v fits on node %v", pod.Name, node.Name)
+	klog.V(2).Infof("Pod %v fits on node %v", pod.Name, node.Name)
 	return true
 }

pkg/descheduler/node/node_test.go

@@ -17,64 +17,71 @@ limitations under the License.
 package node
 
 import (
+	"context"
 	"testing"
 
-	"github.com/kubernetes-incubator/descheduler/test"
 	"k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
+	"sigs.k8s.io/descheduler/test"
 )
 
 func TestReadyNodes(t *testing.T) {
-	node1 := test.BuildTestNode("node1", 1000, 2000, 9)
-	node1.Status.Conditions = []v1.NodeCondition{{Type: v1.NodeOutOfDisk, Status: v1.ConditionTrue}}
-	node2 := test.BuildTestNode("node2", 1000, 2000, 9)
-	node3 := test.BuildTestNode("node3", 1000, 2000, 9)
-	node3.Status.Conditions = []v1.NodeCondition{{Type: v1.NodeMemoryPressure, Status: v1.ConditionTrue}}
-	node4 := test.BuildTestNode("node4", 1000, 2000, 9)
-	node4.Status.Conditions = []v1.NodeCondition{{Type: v1.NodeNetworkUnavailable, Status: v1.ConditionTrue}}
-	node5 := test.BuildTestNode("node5", 1000, 2000, 9)
-	node5.Spec.Unschedulable = true
-	node6 := test.BuildTestNode("node6", 1000, 2000, 9)
-	node6.Status.Conditions = []v1.NodeCondition{{Type: v1.NodeReady, Status: v1.ConditionFalse}}
+	node1 := test.BuildTestNode("node2", 1000, 2000, 9, nil)
+	node2 := test.BuildTestNode("node3", 1000, 2000, 9, nil)
+	node2.Status.Conditions = []v1.NodeCondition{{Type: v1.NodeMemoryPressure, Status: v1.ConditionTrue}}
+	node3 := test.BuildTestNode("node4", 1000, 2000, 9, nil)
+	node3.Status.Conditions = []v1.NodeCondition{{Type: v1.NodeNetworkUnavailable, Status: v1.ConditionTrue}}
+	node4 := test.BuildTestNode("node5", 1000, 2000, 9, nil)
+	node4.Spec.Unschedulable = true
+	node5 := test.BuildTestNode("node6", 1000, 2000, 9, nil)
+	node5.Status.Conditions = []v1.NodeCondition{{Type: v1.NodeReady, Status: v1.ConditionFalse}}
 
 	if !IsReady(node1) {
-		t.Errorf("Expected %v to be ready", node1.Name)
-	}
-	if !IsReady(node2) {
 		t.Errorf("Expected %v to be ready", node2.Name)
 	}
-	if !IsReady(node3) {
+	if !IsReady(node2) {
 		t.Errorf("Expected %v to be ready", node3.Name)
 	}
-	if !IsReady(node4) {
+	if !IsReady(node3) {
 		t.Errorf("Expected %v to be ready", node4.Name)
 	}
-	if !IsReady(node5) {
+	if !IsReady(node4) {
 		t.Errorf("Expected %v to be ready", node5.Name)
 	}
-	if IsReady(node6) {
-		t.Errorf("Expected %v to be not ready", node6.Name)
+	if IsReady(node5) {
+		t.Errorf("Expected %v to be not ready", node5.Name)
 	}
 
 }
 
 func TestReadyNodesWithNodeSelector(t *testing.T) {
-	node1 := test.BuildTestNode("node1", 1000, 2000, 9)
+	ctx := context.Background()
+	node1 := test.BuildTestNode("node1", 1000, 2000, 9, nil)
 	node1.Labels = map[string]string{"type": "compute"}
-	node2 := test.BuildTestNode("node2", 1000, 2000, 9)
+	node2 := test.BuildTestNode("node2", 1000, 2000, 9, nil)
 	node2.Labels = map[string]string{"type": "infra"}
 
 	fakeClient := fake.NewSimpleClientset(node1, node2)
 	nodeSelector := "type=compute"
-	nodes, _ := ReadyNodes(fakeClient, nodeSelector, nil)
+
+	sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
+
+	stopChannel := make(chan struct{}, 0)
+	sharedInformerFactory.Start(stopChannel)
+	sharedInformerFactory.WaitForCacheSync(stopChannel)
+	defer close(stopChannel)
+
+	nodes, _ := ReadyNodes(ctx, fakeClient, nodeInformer, nodeSelector, nil)
 
 	if nodes[0].Name != "node1" {
 		t.Errorf("Expected node1, got %s", nodes[0].Name)
 	}
 }
 
-func TestIsNodeUschedulable(t *testing.T) {
+func TestIsNodeUnschedulable(t *testing.T) {
 	tests := []struct {
 		description     string
 		node            *v1.Node
@@ -96,7 +103,7 @@ func TestIsNodeUschedulable(t *testing.T) {
 		},
 	}
 	for _, test := range tests {
-		actualUnSchedulable := IsNodeUschedulable(test.node)
+		actualUnSchedulable := IsNodeUnschedulable(test.node)
 		if actualUnSchedulable != test.IsUnSchedulable {
 			t.Errorf("Test %#v failed", test.description)
 		}
@@ -247,6 +254,49 @@ func TestPodFitsAnyNode(t *testing.T) {
 			},
 			success: true,
 		},
+		{
+			description: "Pod expected to fit one of the nodes (error node first)",
+			pod: &v1.Pod{
+				Spec: v1.PodSpec{
+					Affinity: &v1.Affinity{
+						NodeAffinity: &v1.NodeAffinity{
+							RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
+								NodeSelectorTerms: []v1.NodeSelectorTerm{
+									{
+										MatchExpressions: []v1.NodeSelectorRequirement{
+											{
+												Key:      nodeLabelKey,
+												Operator: "In",
+												Values: []string{
+													nodeLabelValue,
+												},
+											},
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			nodes: []*v1.Node{
+				{
+					ObjectMeta: metav1.ObjectMeta{
+						Labels: map[string]string{
+							nodeLabelKey: "no",
+						},
+					},
+				},
+				{
+					ObjectMeta: metav1.ObjectMeta{
+						Labels: map[string]string{
+							nodeLabelKey: nodeLabelValue,
+						},
+					},
+				},
+			},
+			success: true,
+		},
 		{
 			description: "Pod expected to fit none of the nodes",
 			pod: &v1.Pod{

pkg/descheduler/pod/pods.go

@@ -17,73 +17,27 @@ limitations under the License.
 package pod
 
 import (
-	"k8s.io/api/core/v1"
+	"context"
+	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"
-	api "k8s.io/kubernetes/pkg/apis/core"
-	"k8s.io/kubernetes/pkg/apis/core/v1/helper/qos"
-	"k8s.io/kubernetes/pkg/kubelet/types"
+	"sigs.k8s.io/descheduler/pkg/utils"
+	"sort"
 )
 
-// checkLatencySensitiveResourcesForAContainer checks if there are any latency sensitive resources like GPUs.
-func checkLatencySensitiveResourcesForAContainer(rl v1.ResourceList) bool {
-	if rl == nil {
-		return false
-	}
-	for rName := range rl {
-		if rName == v1.ResourceNvidiaGPU {
-			return true
-		}
-		// TODO: Add support for other high value resources like hugepages etc. once kube is rebased to 1.8.
-	}
-	return false
-}
-
-// IsLatencySensitivePod checks if a pod consumes high value devices like GPUs, hugepages or when cpu pinning enabled.
-func IsLatencySensitivePod(pod *v1.Pod) bool {
-	for _, container := range pod.Spec.Containers {
-		resourceList := container.Resources.Requests
-		if checkLatencySensitiveResourcesForAContainer(resourceList) {
-			return true
-		}
-	}
-	return false
-}
-
-// IsEvictable checks if a pod is evictable or not.
-func IsEvictable(pod *v1.Pod) bool {
-	ownerRefList := OwnerRef(pod)
-	if IsMirrorPod(pod) || IsPodWithLocalStorage(pod) || len(ownerRefList) == 0 || IsDaemonsetPod(ownerRefList) || IsCriticalPod(pod) {
-		return false
-	}
-	return true
-}
-
-// ListEvictablePodsOnNode returns the list of evictable pods on node.
-func ListEvictablePodsOnNode(client clientset.Interface, node *v1.Node) ([]*v1.Pod, error) {
-	pods, err := ListPodsOnANode(client, node)
-	if err != nil {
-		return []*v1.Pod{}, err
-	}
-	evictablePods := make([]*v1.Pod, 0)
-	for _, pod := range pods {
-		if !IsEvictable(pod) {
-			continue
-		} else {
-			evictablePods = append(evictablePods, pod)
-		}
-	}
-	return evictablePods, nil
-}
-
-func ListPodsOnANode(client clientset.Interface, node *v1.Node) ([]*v1.Pod, error) {
-	fieldSelector, err := fields.ParseSelector("spec.nodeName=" + node.Name + ",status.phase!=" + string(api.PodSucceeded) + ",status.phase!=" + string(api.PodFailed))
+// 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
+// be used by strategies to extend IsEvictable 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(ctx context.Context, client clientset.Interface, node *v1.Node, filter func(pod *v1.Pod) bool) ([]*v1.Pod, error) {
+	fieldSelector, err := fields.ParseSelector("spec.nodeName=" + node.Name + ",status.phase!=" + string(v1.PodSucceeded) + ",status.phase!=" + string(v1.PodFailed))
 	if err != nil {
 		return []*v1.Pod{}, err
 	}
 
-	podList, err := client.CoreV1().Pods(v1.NamespaceAll).List(
+	podList, err := client.CoreV1().Pods(v1.NamespaceAll).List(ctx,
 		metav1.ListOptions{FieldSelector: fieldSelector.String()})
 	if err != nil {
 		return []*v1.Pod{}, err
@@ -91,53 +45,51 @@ func ListPodsOnANode(client clientset.Interface, node *v1.Node) ([]*v1.Pod, erro
 
 	pods := make([]*v1.Pod, 0)
 	for i := range podList.Items {
+		if filter != nil && !filter(&podList.Items[i]) {
+			continue
+		}
 		pods = append(pods, &podList.Items[i])
 	}
 	return pods, nil
 }
 
-func IsCriticalPod(pod *v1.Pod) bool {
-	return types.IsCriticalPod(pod)
-}
-
-func IsBestEffortPod(pod *v1.Pod) bool {
-	return qos.GetPodQOS(pod) == v1.PodQOSBestEffort
-}
-
-func IsBurstablePod(pod *v1.Pod) bool {
-	return qos.GetPodQOS(pod) == v1.PodQOSBurstable
-}
-
-func IsGuaranteedPod(pod *v1.Pod) bool {
-	return qos.GetPodQOS(pod) == v1.PodQOSGuaranteed
-}
-
-func IsDaemonsetPod(ownerRefList []metav1.OwnerReference) bool {
-	for _, ownerRef := range ownerRefList {
-		if ownerRef.Kind == "DaemonSet" {
-			return true
-		}
-	}
-	return false
-}
-
-// IsMirrorPod checks whether the pod is a mirror pod.
-func IsMirrorPod(pod *v1.Pod) bool {
-	_, found := pod.ObjectMeta.Annotations[types.ConfigMirrorAnnotationKey]
-	return found
-}
-
-func IsPodWithLocalStorage(pod *v1.Pod) bool {
-	for _, volume := range pod.Spec.Volumes {
-		if volume.HostPath != nil || volume.EmptyDir != nil {
-			return true
-		}
-	}
-
-	return false
-}
-
 // OwnerRef returns the ownerRefList for the pod.
 func OwnerRef(pod *v1.Pod) []metav1.OwnerReference {
 	return pod.ObjectMeta.GetOwnerReferences()
 }
+
+func IsBestEffortPod(pod *v1.Pod) bool {
+	return utils.GetPodQOS(pod) == v1.PodQOSBestEffort
+}
+
+func IsBurstablePod(pod *v1.Pod) bool {
+	return utils.GetPodQOS(pod) == v1.PodQOSBurstable
+}
+
+func IsGuaranteedPod(pod *v1.Pod) bool {
+	return utils.GetPodQOS(pod) == v1.PodQOSGuaranteed
+}
+
+// SortPodsBasedOnPriorityLowToHigh sorts pods based on their priorities from low to high.
+// If pods have same priorities, they will be sorted by QoS in the following order:
+// BestEffort, Burstable, Guaranteed
+func SortPodsBasedOnPriorityLowToHigh(pods []*v1.Pod) {
+	sort.Slice(pods, func(i, j int) bool {
+		if pods[i].Spec.Priority == nil && pods[j].Spec.Priority != nil {
+			return true
+		}
+		if pods[j].Spec.Priority == nil && pods[i].Spec.Priority != nil {
+			return false
+		}
+		if (pods[j].Spec.Priority == nil && pods[i].Spec.Priority == nil) || (*pods[i].Spec.Priority == *pods[j].Spec.Priority) {
+			if IsBestEffortPod(pods[i]) {
+				return true
+			}
+			if IsBurstablePod(pods[i]) && IsGuaranteedPod(pods[j]) {
+				return true
+			}
+			return false
+		}
+		return *pods[i].Spec.Priority < *pods[j].Spec.Priority
+	})
+}

pkg/descheduler/pod/pods_test.go

@@ -17,68 +17,99 @@ limitations under the License.
 package pod
 
 import (
+	"context"
+	"fmt"
+	"reflect"
+	"strings"
 	"testing"
 
-	"github.com/kubernetes-incubator/descheduler/test"
-	"k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/api/resource"
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes/fake"
+	core "k8s.io/client-go/testing"
+	"sigs.k8s.io/descheduler/test"
 )
 
-func TestPodTypes(t *testing.T) {
-	n1 := test.BuildTestNode("node1", 1000, 2000, 9)
-	p1 := test.BuildTestPod("p1", 400, 0, n1.Name)
+var (
+	lowPriority  = int32(0)
+	highPriority = int32(10000)
+)
 
-	// These won't be evicted.
-	p2 := test.BuildTestPod("p2", 400, 0, n1.Name)
-	p3 := test.BuildTestPod("p3", 400, 0, n1.Name)
-	p4 := test.BuildTestPod("p4", 400, 0, n1.Name)
-	p5 := test.BuildTestPod("p5", 400, 0, n1.Name)
-	p6 := test.BuildTestPod("p6", 400, 0, n1.Name)
-	p6.Spec.Containers[0].Resources.Requests[v1.ResourceNvidiaGPU] = *resource.NewMilliQuantity(3, resource.DecimalSI)
-
-	p6.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
-
-	p1.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	// The following 4 pods won't get evicted.
-	// A daemonset.
-	//p2.Annotations = test.GetDaemonSetAnnotation()
-	p2.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
-	// A pod with local storage.
-	p3.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
-	p3.Spec.Volumes = []v1.Volume{
+func TestListPodsOnANode(t *testing.T) {
+	testCases := []struct {
+		name             string
+		pods             map[string][]v1.Pod
+		node             *v1.Node
+		expectedPodCount int
+	}{
 		{
-			Name: "sample",
-			VolumeSource: v1.VolumeSource{
-				HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
-				EmptyDir: &v1.EmptyDirVolumeSource{
-					SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+			name: "test listing pods on a node",
+			pods: map[string][]v1.Pod{
+				"n1": {
+					*test.BuildTestPod("pod1", 100, 0, "n1", nil),
+					*test.BuildTestPod("pod2", 100, 0, "n1", nil),
+				},
+				"n2": {*test.BuildTestPod("pod3", 100, 0, "n2", nil)},
 			},
+			node:             test.BuildTestNode("n1", 2000, 3000, 10, nil),
+			expectedPodCount: 2,
 		},
 	}
-	// A Mirror Pod.
-	p4.Annotations = test.GetMirrorPodAnnotation()
-	// A Critical Pod.
-	p5.Namespace = "kube-system"
-	p5.Annotations = test.GetCriticalPodAnnotation()
-	if !IsMirrorPod(p4) {
-		t.Errorf("Expected p4 to be a mirror pod.")
+	for _, testCase := range testCases {
+		fakeClient := &fake.Clientset{}
+		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
+			list := action.(core.ListAction)
+			fieldString := list.GetListRestrictions().Fields.String()
+			if strings.Contains(fieldString, "n1") {
+				return true, &v1.PodList{Items: testCase.pods["n1"]}, nil
+			} else if strings.Contains(fieldString, "n2") {
+				return true, &v1.PodList{Items: testCase.pods["n2"]}, nil
+			}
+			return true, nil, fmt.Errorf("Failed to list: %v", list)
+		})
+		pods, _ := ListPodsOnANode(context.TODO(), fakeClient, testCase.node, nil)
+		if len(pods) != testCase.expectedPodCount {
+			t.Errorf("expected %v pods on node %v, got %+v", testCase.expectedPodCount, testCase.node.Name, len(pods))
+		}
+	}
+}
+
+func TestSortPodsBasedOnPriorityLowToHigh(t *testing.T) {
+	n1 := test.BuildTestNode("n1", 4000, 3000, 9, nil)
+
+	p1 := test.BuildTestPod("p1", 400, 0, n1.Name, func(pod *v1.Pod) {
+		test.SetPodPriority(pod, lowPriority)
+	})
+
+	// BestEffort
+	p2 := test.BuildTestPod("p2", 400, 0, n1.Name, func(pod *v1.Pod) {
+		test.SetPodPriority(pod, highPriority)
+		test.MakeBestEffortPod(pod)
+	})
+
+	// Burstable
+	p3 := test.BuildTestPod("p3", 400, 0, n1.Name, func(pod *v1.Pod) {
+		test.SetPodPriority(pod, highPriority)
+		test.MakeBurstablePod(pod)
+	})
+
+	// Guaranteed
+	p4 := test.BuildTestPod("p4", 400, 100, n1.Name, func(pod *v1.Pod) {
+		test.SetPodPriority(pod, highPriority)
+		test.MakeGuaranteedPod(pod)
+	})
+
+	// Best effort with nil priorities.
+	p5 := test.BuildTestPod("p5", 400, 100, n1.Name, test.MakeBestEffortPod)
+	p5.Spec.Priority = nil
+
+	p6 := test.BuildTestPod("p6", 400, 100, n1.Name, test.MakeGuaranteedPod)
+	p6.Spec.Priority = nil
+
+	podList := []*v1.Pod{p4, p3, p2, p1, p6, p5}
+
+	SortPodsBasedOnPriorityLowToHigh(podList)
+	if !reflect.DeepEqual(podList[len(podList)-1], p4) {
+		t.Errorf("Expected last pod in sorted list to be %v which of highest priority and guaranteed but got %v", p4, podList[len(podList)-1])
 	}
-	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.")
-	}
-	ownerRefList := OwnerRef(p2)
-	if !IsDaemonsetPod(ownerRefList) {
-		t.Errorf("Expected p2 to be a daemonset pod.")
-	}
-	ownerRefList = OwnerRef(p1)
-	if IsDaemonsetPod(ownerRefList) || IsPodWithLocalStorage(p1) || IsCriticalPod(p1) || IsMirrorPod(p1) {
-		t.Errorf("Expected p1 to be a normal pod.")
-	}
-	if !IsLatencySensitivePod(p6) {
-		t.Errorf("Expected p6 to be latency sensitive pod")
-	}
-
 }

pkg/descheduler/policyconfig.go

@@ -21,17 +21,16 @@ import (
 	"io/ioutil"
 
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/klog/v2"
 
-	"github.com/golang/glog"
-	"github.com/kubernetes-incubator/descheduler/pkg/api"
-	_ "github.com/kubernetes-incubator/descheduler/pkg/api/install"
-	"github.com/kubernetes-incubator/descheduler/pkg/api/v1alpha1"
-	"github.com/kubernetes-incubator/descheduler/pkg/descheduler/scheme"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/api/v1alpha1"
+	"sigs.k8s.io/descheduler/pkg/descheduler/scheme"
 )
 
 func LoadPolicyConfig(policyConfigFile string) (*api.DeschedulerPolicy, error) {
 	if policyConfigFile == "" {
-		glog.V(1).Infof("policy config file not specified")
+		klog.V(1).Infof("policy config file not specified")
 		return nil, nil
 	}
 

pkg/descheduler/scheme/scheme.go

@@ -17,17 +17,11 @@ limitations under the License.
 package scheme
 
 import (
-	"os"
-
-	"k8s.io/apimachinery/pkg/apimachinery/announced"
-	"k8s.io/apimachinery/pkg/apimachinery/registered"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/serializer"
 )
 
 var (
-	GroupFactoryRegistry = make(announced.APIGroupFactoryRegistry)
-	Registry             = registered.NewOrDie(os.Getenv("DESCHEDULER_API_VERSIONS"))
-	Scheme               = runtime.NewScheme()
-	Codecs               = serializer.NewCodecFactory(Scheme)
+	Scheme = runtime.NewScheme()
+	Codecs = serializer.NewCodecFactory(Scheme)
 )

pkg/descheduler/strategies/duplicates.go

@@ -17,82 +17,111 @@ limitations under the License.
 package strategies
 
 import (
+	"context"
+	"reflect"
+	"sort"
 	"strings"
 
-	"github.com/golang/glog"
-
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/sets"
 	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/klog/v2"
 
-	"github.com/kubernetes-incubator/descheduler/cmd/descheduler/app/options"
-	"github.com/kubernetes-incubator/descheduler/pkg/api"
-	"github.com/kubernetes-incubator/descheduler/pkg/descheduler/evictions"
-	podutil "github.com/kubernetes-incubator/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 )
 
-//type creator string
-type DuplicatePodsMap map[string][]*v1.Pod
-
 // 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. As of now, this strategy won't evict daemonsets, mirror pods, critical pods and pods with local storages.
-func RemoveDuplicatePods(ds *options.DeschedulerServer, strategy api.DeschedulerStrategy, policyGroupVersion string, nodes []*v1.Node, nodepodCount nodePodEvictedCount) {
-	if !strategy.Enabled {
-		return
-	}
-	deleteDuplicatePods(ds.Client, policyGroupVersion, nodes, ds.DryRun, nodepodCount, ds.MaxNoOfPodsToEvictPerNode)
-}
-
-// deleteDuplicatePods evicts the pod from node and returns the count of evicted pods.
-func deleteDuplicatePods(client clientset.Interface, policyGroupVersion string, nodes []*v1.Node, dryRun bool, nodepodCount nodePodEvictedCount, maxPodsToEvict int) int {
-	podsEvicted := 0
+// namespace, and have at least one container with the same image.
+// As of now, this strategy won't evict daemonsets, mirror pods, critical pods and pods with local storages.
+func RemoveDuplicatePods(
+	ctx context.Context,
+	client clientset.Interface,
+	strategy api.DeschedulerStrategy,
+	nodes []*v1.Node,
+	podEvictor *evictions.PodEvictor,
+) {
 	for _, node := range nodes {
-		glog.V(1).Infof("Processing node: %#v", node.Name)
-		dpm := ListDuplicatePodsOnANode(client, node)
-		for creator, pods := range dpm {
-			if len(pods) > 1 {
-				glog.V(1).Infof("%#v", creator)
-				// i = 0 does not evict the first pod
-				for i := 1; i < len(pods); i++ {
-					if maxPodsToEvict > 0 && nodepodCount[node]+1 > maxPodsToEvict {
-						break
-					}
-					success, err := evictions.EvictPod(client, pods[i], policyGroupVersion, dryRun)
-					if !success {
-						glog.Infof("Error when evicting pod: %#v (%#v)", pods[i].Name, err)
-					} else {
-						nodepodCount[node]++
-						glog.V(1).Infof("Evicted pod: %#v (%#v)", pods[i].Name, err)
-					}
+		klog.V(1).Infof("Processing node: %#v", node.Name)
+		pods, err := podutil.ListPodsOnANode(ctx, client, node, podEvictor.IsEvictable)
+		if err != nil {
+			klog.Errorf("error listing evictable pods on node %s: %+v", node.Name, err)
+			continue
+		}
+
+		duplicatePods := make([]*v1.Pod, 0, len(pods))
+		// 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.
+		// This list of keys representing a single pod is then sorted alphabetically.
+		// If any other pod has a list that matches that pod's list, those pods are undeniably duplicates for the following reasons:
+		//   - The 2 pods have the exact same ownerrefs
+		//   - The 2 pods have the exact same container images
+		//
+		// duplicateKeysMap maps the first Namespace/Kind/Name/Image in a pod's list to a 2D-slice of all the other lists where that is the first key
+		// (Since we sort each pod's list, we only need to key the map on the first entry in each list. Any pod that doesn't have
+		// the same first entry is clearly not a duplicate. This makes lookup quick and minimizes storage needed).
+		// If any of the existing lists for that first key matches the current pod's list, the current pod is a duplicate.
+		// If not, then we add this pod's list to the list of lists for that key.
+		duplicateKeysMap := map[string][][]string{}
+		for _, pod := range pods {
+			ownerRefList := podutil.OwnerRef(pod)
+			if hasExcludedOwnerRefKind(ownerRefList, strategy) {
+				continue
+			}
+			podContainerKeys := make([]string, 0, len(ownerRefList)*len(pod.Spec.Containers))
+			for _, ownerRef := range ownerRefList {
+				for _, container := range pod.Spec.Containers {
+					// 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}, "/")
+					podContainerKeys = append(podContainerKeys, s)
 				}
 			}
+			sort.Strings(podContainerKeys)
+
+			// If there have been any other pods with the same first "key", look through all the lists to see if any match
+			if existing, ok := duplicateKeysMap[podContainerKeys[0]]; ok {
+				matched := false
+				for _, keys := range existing {
+					if reflect.DeepEqual(keys, podContainerKeys) {
+						matched = true
+						duplicatePods = append(duplicatePods, pod)
+						break
+					}
+				}
+				if !matched {
+					// Found no matches, add this list of keys to the list of lists that have the same first key
+					duplicateKeysMap[podContainerKeys[0]] = append(duplicateKeysMap[podContainerKeys[0]], podContainerKeys)
+				}
+			} else {
+				// This is the first pod we've seen that has this first "key" entry
+				duplicateKeysMap[podContainerKeys[0]] = [][]string{podContainerKeys}
+			}
 		}
-		podsEvicted += nodepodCount[node]
-	}
-	return podsEvicted
-}
 
-// ListDuplicatePodsOnANode lists duplicate pods on a given node.
-func ListDuplicatePodsOnANode(client clientset.Interface, node *v1.Node) DuplicatePodsMap {
-	pods, err := podutil.ListEvictablePodsOnNode(client, node)
-	if err != nil {
-		return nil
-	}
-	return FindDuplicatePods(pods)
-}
-
-// FindDuplicatePods takes a list of pods and returns a duplicatePodsMap.
-func FindDuplicatePods(pods []*v1.Pod) DuplicatePodsMap {
-	dpm := DuplicatePodsMap{}
-	for _, pod := range pods {
-		// Ignoring the error here as in the ListDuplicatePodsOnNode function we call ListEvictablePodsOnNode
-		// which checks for error.
-		ownerRefList := podutil.OwnerRef(pod)
-		for _, ownerRef := range ownerRefList {
-			// ownerRef doesn't need namespace since the assumption is owner needs to be in the same namespace.
-			s := strings.Join([]string{ownerRef.Kind, ownerRef.Name}, "/")
-			dpm[s] = append(dpm[s], pod)
+		for _, pod := range duplicatePods {
+			if _, err := podEvictor.EvictPod(ctx, pod, node, "RemoveDuplicatePods"); err != nil {
+				klog.Errorf("Error evicting pod: (%#v)", err)
+				break
+			}
 		}
 	}
-	return dpm
+}
+
+func hasExcludedOwnerRefKind(ownerRefs []metav1.OwnerReference, strategy api.DeschedulerStrategy) bool {
+	if strategy.Params == nil || strategy.Params.RemoveDuplicates == nil {
+		return false
+	}
+	exclude := sets.NewString(strategy.Params.RemoveDuplicates.ExcludeOwnerKinds...)
+	for _, owner := range ownerRefs {
+		if exclude.Has(owner.Kind) {
+			return true
+		}
+	}
+	return false
 }

pkg/descheduler/strategies/duplicates_test.go

@@ -17,40 +17,70 @@ limitations under the License.
 package strategies
 
 import (
+	"context"
 	"testing"
 
-	"github.com/kubernetes-incubator/descheduler/test"
 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	"sigs.k8s.io/descheduler/pkg/utils"
+	"sigs.k8s.io/descheduler/test"
 )
 
-//TODO:@ravisantoshgudimetla This could be made table driven.
 func TestFindDuplicatePods(t *testing.T) {
-	node := test.BuildTestNode("n1", 2000, 3000, 10)
-	p1 := test.BuildTestPod("p1", 100, 0, node.Name)
-	p2 := test.BuildTestPod("p2", 100, 0, node.Name)
-	p3 := test.BuildTestPod("p3", 100, 0, node.Name)
-	p4 := test.BuildTestPod("p4", 100, 0, node.Name)
-	p5 := test.BuildTestPod("p5", 100, 0, node.Name)
-	p6 := test.BuildTestPod("p6", 100, 0, node.Name)
-	p7 := test.BuildTestPod("p7", 100, 0, node.Name)
-	p8 := test.BuildTestPod("p8", 100, 0, node.Name)
-	p9 := test.BuildTestPod("p9", 100, 0, node.Name)
+	ctx := context.Background()
+	// first setup pods
+	node := test.BuildTestNode("n1", 2000, 3000, 10, nil)
+	p1 := test.BuildTestPod("p1", 100, 0, node.Name, nil)
+	p1.Namespace = "dev"
+	p2 := test.BuildTestPod("p2", 100, 0, node.Name, nil)
+	p2.Namespace = "dev"
+	p3 := test.BuildTestPod("p3", 100, 0, node.Name, nil)
+	p3.Namespace = "dev"
+	p4 := test.BuildTestPod("p4", 100, 0, node.Name, nil)
+	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)
+	p7.Namespace = "kube-system"
+	p8 := test.BuildTestPod("p8", 100, 0, node.Name, nil)
+	p8.Namespace = "test"
+	p9 := test.BuildTestPod("p9", 100, 0, node.Name, nil)
+	p9.Namespace = "test"
+	p10 := test.BuildTestPod("p10", 100, 0, node.Name, nil)
+	p10.Namespace = "test"
+	p11 := test.BuildTestPod("p11", 100, 0, node.Name, nil)
+	p11.Namespace = "different-images"
+	p12 := test.BuildTestPod("p12", 100, 0, node.Name, nil)
+	p12.Namespace = "different-images"
+	p13 := test.BuildTestPod("p13", 100, 0, node.Name, nil)
+	p13.Namespace = "different-images"
+	p14 := test.BuildTestPod("p14", 100, 0, node.Name, nil)
+	p14.Namespace = "different-images"
 
-	// All the following pods expect for one will be evicted.
-	p1.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	p2.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	p3.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	p8.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	p9.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
+	// ### Evictable Pods ###
 
-	// The following 4 pods won't get evicted.
-	// A daemonset.
+	// Three Pods in the "default" Namespace, bound to same ReplicaSet. 2 should be evicted.
+	ownerRef1 := test.GetReplicaSetOwnerRefList()
+	p1.ObjectMeta.OwnerReferences = ownerRef1
+	p2.ObjectMeta.OwnerReferences = ownerRef1
+	p3.ObjectMeta.OwnerReferences = ownerRef1
+
+	// Three Pods in the "test" Namespace, bound to same ReplicaSet. 2 should be evicted.
+	ownerRef2 := test.GetReplicaSetOwnerRefList()
+	p8.ObjectMeta.OwnerReferences = ownerRef2
+	p9.ObjectMeta.OwnerReferences = ownerRef2
+	p10.ObjectMeta.OwnerReferences = ownerRef2
+
+	// ### Non-evictable Pods ###
+
+	// A DaemonSet.
 	p4.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
-	// A pod with local storage.
+
+	// A Pod with local storage.
 	p5.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 	p5.Spec.Volumes = []v1.Volume{
 		{
@@ -62,24 +92,121 @@ func TestFindDuplicatePods(t *testing.T) {
 			},
 		},
 	}
+
 	// A Mirror Pod.
 	p6.Annotations = test.GetMirrorPodAnnotation()
+
 	// A Critical Pod.
-	p7.Namespace = "kube-system"
-	p7.Annotations = test.GetCriticalPodAnnotation()
-	expectedEvictedPodCount := 2
-	fakeClient := &fake.Clientset{}
-	fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-		return true, &v1.PodList{Items: []v1.Pod{*p1, *p2, *p3, *p4, *p5, *p6, *p7, *p8, *p9}}, nil
+	priority := utils.SystemCriticalPriority
+	p7.Spec.Priority = &priority
+
+	// Same owners, but different images
+	p11.Spec.Containers[0].Image = "foo"
+	p11.ObjectMeta.OwnerReferences = ownerRef1
+	p12.Spec.Containers[0].Image = "bar"
+	p12.ObjectMeta.OwnerReferences = ownerRef1
+
+	// Multiple containers
+	p13.ObjectMeta.OwnerReferences = ownerRef1
+	p13.Spec.Containers = append(p13.Spec.Containers, v1.Container{
+		Name:  "foo",
+		Image: "foo",
 	})
-	fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
-		return true, node, nil
-	})
-	npe := nodePodEvictedCount{}
-	npe[node] = 0
-	podsEvicted := deleteDuplicatePods(fakeClient, "v1", []*v1.Node{node}, false, npe, 2)
-	if podsEvicted != expectedEvictedPodCount {
-		t.Errorf("Unexpected no of pods evicted")
+
+	testCases := []struct {
+		description             string
+		maxPodsToEvictPerNode   int
+		pods                    []v1.Pod
+		expectedEvictedPodCount int
+		strategy                api.DeschedulerStrategy
+	}{
+		{
+			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet. 2 should be evicted.",
+			maxPodsToEvictPerNode:   5,
+			pods:                    []v1.Pod{*p1, *p2, *p3},
+			expectedEvictedPodCount: 2,
+			strategy:                api.DeschedulerStrategy{},
+		},
+		{
+			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet, but ReplicaSet kind is excluded. 0 should be evicted.",
+			maxPodsToEvictPerNode:   5,
+			pods:                    []v1.Pod{*p1, *p2, *p3},
+			expectedEvictedPodCount: 0,
+			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{RemoveDuplicates: &api.RemoveDuplicates{ExcludeOwnerKinds: []string{"ReplicaSet"}}}},
+		},
+		{
+			description:             "Three Pods in the `test` Namespace, bound to same ReplicaSet. 2 should be evicted.",
+			maxPodsToEvictPerNode:   5,
+			pods:                    []v1.Pod{*p8, *p9, *p10},
+			expectedEvictedPodCount: 2,
+			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,
+			strategy:                api.DeschedulerStrategy{},
+		},
+		{
+			description:             "Pods are: part of DaemonSet, with local storage, mirror pod annotation, critical pod annotation - none should be evicted.",
+			maxPodsToEvictPerNode:   2,
+			pods:                    []v1.Pod{*p4, *p5, *p6, *p7},
+			expectedEvictedPodCount: 0,
+			strategy:                api.DeschedulerStrategy{},
+		},
+		{
+			description:             "Test all Pods: 4 should be evicted.",
+			maxPodsToEvictPerNode:   5,
+			pods:                    []v1.Pod{*p1, *p2, *p3, *p4, *p5, *p6, *p7, *p8, *p9, *p10},
+			expectedEvictedPodCount: 4,
+			strategy:                api.DeschedulerStrategy{},
+		},
+		{
+			description:             "Pods with the same owner but different images should not be evicted",
+			maxPodsToEvictPerNode:   5,
+			pods:                    []v1.Pod{*p11, *p12},
+			expectedEvictedPodCount: 0,
+			strategy:                api.DeschedulerStrategy{},
+		},
+		{
+			description:             "Pods with multiple containers should not match themselves",
+			maxPodsToEvictPerNode:   5,
+			pods:                    []v1.Pod{*p13},
+			expectedEvictedPodCount: 0,
+			strategy:                api.DeschedulerStrategy{},
+		},
+		{
+			description:             "Pods with matching ownerrefs and at not all matching image should not trigger an eviction",
+			maxPodsToEvictPerNode:   5,
+			pods:                    []v1.Pod{*p11, *p13},
+			expectedEvictedPodCount: 0,
+			strategy:                api.DeschedulerStrategy{},
+		},
+	}
+
+	for _, testCase := range testCases {
+		fakeClient := &fake.Clientset{}
+		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,
+			"v1",
+			false,
+			testCase.maxPodsToEvictPerNode,
+			[]*v1.Node{node},
+			false,
+		)
+
+		RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, []*v1.Node{node}, 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

@@ -17,115 +17,150 @@ limitations under the License.
 package strategies
 
 import (
+	"context"
+	"fmt"
 	"sort"
 
-	"github.com/golang/glog"
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	clientset "k8s.io/client-go/kubernetes"
-	helper "k8s.io/kubernetes/pkg/api/v1/resource"
+	"k8s.io/klog/v2"
 
-	"github.com/kubernetes-incubator/descheduler/cmd/descheduler/app/options"
-	"github.com/kubernetes-incubator/descheduler/pkg/api"
-	"github.com/kubernetes-incubator/descheduler/pkg/descheduler/evictions"
-	nodeutil "github.com/kubernetes-incubator/descheduler/pkg/descheduler/node"
-	podutil "github.com/kubernetes-incubator/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/utils"
 )
 
+// NodeUsageMap stores a node's info, pods on it and its resource usage
 type NodeUsageMap struct {
-	node             *v1.Node
-	usage            api.ResourceThresholds
-	allPods          []*v1.Pod
-	nonRemovablePods []*v1.Pod
-	bePods           []*v1.Pod
-	bPods            []*v1.Pod
-	gPods            []*v1.Pod
+	node    *v1.Node
+	usage   api.ResourceThresholds
+	allPods []*v1.Pod
 }
+
+// NodePodsMap is a set of (node, pods) pairs
 type NodePodsMap map[*v1.Node][]*v1.Pod
 
-func LowNodeUtilization(ds *options.DeschedulerServer, strategy api.DeschedulerStrategy, evictionPolicyGroupVersion string, nodes []*v1.Node, nodepodCount nodePodEvictedCount) {
-	if !strategy.Enabled {
-		return
-	}
+const (
+	// MinResourcePercentage is the minimum value of a resource's percentage
+	MinResourcePercentage = 0
+	// MaxResourcePercentage is the maximum value of a resource's percentage
+	MaxResourcePercentage = 100
+)
+
+// 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 {
+		klog.V(1).Infof("NodeResourceUtilizationThresholds not set")
+		return
+	}
 
 	thresholds := strategy.Params.NodeResourceUtilizationThresholds.Thresholds
-	if !validateThresholds(thresholds) {
+	targetThresholds := strategy.Params.NodeResourceUtilizationThresholds.TargetThresholds
+	if err := validateStrategyConfig(thresholds, targetThresholds); err != nil {
+		klog.Errorf("LowNodeUtilization config is not valid: %v", err)
 		return
 	}
-	targetThresholds := strategy.Params.NodeResourceUtilizationThresholds.TargetThresholds
-	if !validateTargetThresholds(targetThresholds) {
-		return
+	// check if Pods/CPU/Mem are set, if not, set them to 100
+	if _, ok := thresholds[v1.ResourcePods]; !ok {
+		thresholds[v1.ResourcePods] = MaxResourcePercentage
+		targetThresholds[v1.ResourcePods] = MaxResourcePercentage
+	}
+	if _, ok := thresholds[v1.ResourceCPU]; !ok {
+		thresholds[v1.ResourceCPU] = MaxResourcePercentage
+		targetThresholds[v1.ResourceCPU] = MaxResourcePercentage
+	}
+	if _, ok := thresholds[v1.ResourceMemory]; !ok {
+		thresholds[v1.ResourceMemory] = MaxResourcePercentage
+		targetThresholds[v1.ResourceMemory] = MaxResourcePercentage
 	}
 
-	npm := CreateNodePodsMap(ds.Client, nodes)
+	npm := createNodePodsMap(ctx, client, nodes)
 	lowNodes, targetNodes := classifyNodes(npm, thresholds, targetThresholds)
 
-	glog.V(1).Infof("Criteria for a node under utilization: CPU: %v, Mem: %v, Pods: %v",
+	klog.V(1).Infof("Criteria for a node under utilization: CPU: %v, Mem: %v, Pods: %v",
 		thresholds[v1.ResourceCPU], thresholds[v1.ResourceMemory], thresholds[v1.ResourcePods])
 
 	if len(lowNodes) == 0 {
-		glog.V(1).Infof("No node is underutilized, nothing to do here, you might tune your thersholds further")
+		klog.V(1).Infof("No node is underutilized, nothing to do here, you might tune your thresholds further")
 		return
 	}
-	glog.V(1).Infof("Total number of underutilized nodes: %v", len(lowNodes))
+	klog.V(1).Infof("Total number of underutilized nodes: %v", len(lowNodes))
 
 	if len(lowNodes) < strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes {
-		glog.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).Infof("number of nodes underutilized (%v) is less than NumberOfNodes (%v), nothing to do here", len(lowNodes), strategy.Params.NodeResourceUtilizationThresholds.NumberOfNodes)
 		return
 	}
 
 	if len(lowNodes) == len(nodes) {
-		glog.V(1).Infof("all nodes are underutilized, nothing to do here")
+		klog.V(1).Infof("all nodes are underutilized, nothing to do here")
 		return
 	}
 
 	if len(targetNodes) == 0 {
-		glog.V(1).Infof("all nodes are under target utilization, nothing to do here")
+		klog.V(1).Infof("all nodes are under target utilization, nothing to do here")
 		return
 	}
 
-	glog.V(1).Infof("Criteria for a node above target utilization: CPU: %v, Mem: %v, Pods: %v",
+	klog.V(1).Infof("Criteria for a node above target utilization: CPU: %v, Mem: %v, Pods: %v",
 		targetThresholds[v1.ResourceCPU], targetThresholds[v1.ResourceMemory], targetThresholds[v1.ResourcePods])
-	glog.V(1).Infof("Total number of nodes above target utilization: %v", len(targetNodes))
+	klog.V(1).Infof("Total number of nodes above target utilization: %v", len(targetNodes))
 
-	totalPodsEvicted := evictPodsFromTargetNodes(ds.Client, evictionPolicyGroupVersion, targetNodes, lowNodes, targetThresholds, ds.DryRun, ds.MaxNoOfPodsToEvictPerNode, nodepodCount)
-	glog.V(1).Infof("Total number of pods evicted: %v", totalPodsEvicted)
+	evictPodsFromTargetNodes(
+		ctx,
+		targetNodes,
+		lowNodes,
+		targetThresholds,
+		podEvictor)
 
+	klog.V(1).Infof("Total number of pods evicted: %v", podEvictor.TotalEvicted())
 }
 
-func validateThresholds(thresholds api.ResourceThresholds) bool {
-	if thresholds == nil || len(thresholds) == 0 {
-		glog.V(1).Infof("no resource threshold is configured")
-		return false
+// validateStrategyConfig checks if the strategy's config is valid
+func validateStrategyConfig(thresholds, targetThresholds api.ResourceThresholds) error {
+	// validate thresholds and targetThresholds config
+	if err := validateThresholds(thresholds); err != nil {
+		return fmt.Errorf("thresholds config is not valid: %v", err)
 	}
-	for name := range thresholds {
-		switch name {
-		case v1.ResourceCPU:
-			continue
-		case v1.ResourceMemory:
-			continue
-		case v1.ResourcePods:
-			continue
-		default:
-			glog.Errorf("only cpu, memory, or pods thresholds can be specified")
-			return false
+	if err := validateThresholds(targetThresholds); err != nil {
+		return fmt.Errorf("targetThresholds config is not valid: %v", err)
+	}
+
+	// validate if thresholds and targetThresholds have same resources configured
+	if len(thresholds) != len(targetThresholds) {
+		return fmt.Errorf("thresholds and targetThresholds configured different resources")
+	}
+	for resourceName, value := range thresholds {
+		if targetValue, ok := targetThresholds[resourceName]; !ok {
+			return fmt.Errorf("thresholds and targetThresholds configured different resources")
+		} else if value > targetValue {
+			return fmt.Errorf("thresholds' %v percentage is greater than targetThresholds'", resourceName)
 		}
 	}
-	return true
+	return nil
 }
 
-//This function could be merged into above once we are clear.
-func validateTargetThresholds(targetThresholds api.ResourceThresholds) bool {
-	if targetThresholds == nil {
-		glog.V(1).Infof("no target resource threshold is configured")
-		return false
-	} else if _, ok := targetThresholds[v1.ResourcePods]; !ok {
-		glog.V(1).Infof("no target resource threshold for pods is configured")
-		return false
+// validateThresholds checks if thresholds have valid resource name and resource percentage configured
+func validateThresholds(thresholds api.ResourceThresholds) error {
+	if thresholds == nil || len(thresholds) == 0 {
+		return fmt.Errorf("no resource threshold is configured")
 	}
-	return true
+	for name, percent := range thresholds {
+		switch name {
+		case v1.ResourceCPU, v1.ResourceMemory, v1.ResourcePods:
+			if percent < MinResourcePercentage || percent > MaxResourcePercentage {
+				return fmt.Errorf("%v threshold not in [%v, %v] range", name, MinResourcePercentage, MaxResourcePercentage)
+			}
+		default:
+			return fmt.Errorf("only cpu, memory, or pods thresholds can be specified")
+		}
+	}
+	return nil
 }
 
 // classifyNodes classifies the nodes into low-utilization or high-utilization nodes. If a node lies between
@@ -133,32 +168,43 @@ func validateTargetThresholds(targetThresholds api.ResourceThresholds) bool {
 func classifyNodes(npm NodePodsMap, thresholds api.ResourceThresholds, targetThresholds api.ResourceThresholds) ([]NodeUsageMap, []NodeUsageMap) {
 	lowNodes, targetNodes := []NodeUsageMap{}, []NodeUsageMap{}
 	for node, pods := range npm {
-		usage, allPods, nonRemovablePods, bePods, bPods, gPods := NodeUtilization(node, pods)
-		nuMap := NodeUsageMap{node, usage, allPods, nonRemovablePods, bePods, bPods, gPods}
-
+		usage := nodeUtilization(node, pods)
+		nuMap := NodeUsageMap{
+			node:    node,
+			usage:   usage,
+			allPods: pods,
+		}
 		// Check if node is underutilized and if we can schedule pods on it.
-		if !nodeutil.IsNodeUschedulable(node) && IsNodeWithLowUtilization(usage, thresholds) {
-			glog.V(2).Infof("Node %#v is under utilized with usage: %#v", node.Name, usage)
+		if !nodeutil.IsNodeUnschedulable(node) && isNodeWithLowUtilization(usage, thresholds) {
+			klog.V(2).Infof("Node %#v is under utilized with usage: %#v", node.Name, usage)
 			lowNodes = append(lowNodes, nuMap)
-		} else if IsNodeAboveTargetUtilization(usage, targetThresholds) {
-			glog.V(2).Infof("Node %#v is over utilized with usage: %#v", node.Name, usage)
+		} else if isNodeAboveTargetUtilization(usage, targetThresholds) {
+			klog.V(2).Infof("Node %#v is over utilized with usage: %#v", node.Name, usage)
 			targetNodes = append(targetNodes, nuMap)
 		} else {
-			glog.V(2).Infof("Node %#v is appropriately utilized with usage: %#v", node.Name, usage)
+			klog.V(2).Infof("Node %#v is appropriately utilized with usage: %#v", node.Name, usage)
 		}
-		glog.V(2).Infof("allPods:%v, nonRemovablePods:%v, bePods:%v, bPods:%v, gPods:%v", len(allPods), len(nonRemovablePods), len(bePods), len(bPods), len(gPods))
 	}
 	return lowNodes, targetNodes
 }
 
-func evictPodsFromTargetNodes(client clientset.Interface, evictionPolicyGroupVersion string, targetNodes, lowNodes []NodeUsageMap, targetThresholds api.ResourceThresholds, dryRun bool, maxPodsToEvict int, nodepodCount nodePodEvictedCount) int {
-	podsEvicted := 0
+// evictPodsFromTargetNodes evicts pods based on priority, if all the pods on the node have priority, if not
+// evicts them based on QoS as fallback option.
+// TODO: @ravig Break this function into smaller functions.
+func evictPodsFromTargetNodes(
+	ctx context.Context,
+	targetNodes, lowNodes []NodeUsageMap,
+	targetThresholds api.ResourceThresholds,
+	podEvictor *evictions.PodEvictor,
+) {
 
-	SortNodesByUsage(targetNodes)
+	sortNodesByUsage(targetNodes)
 
 	// upper bound on total number of pods/cpu/memory to be moved
-	var totalPods, totalCpu, totalMem float64
+	var totalPods, totalCPU, totalMem float64
+	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 {
 			nodeCapacity = node.node.Status.Allocatable
@@ -168,82 +214,88 @@ func evictPodsFromTargetNodes(client clientset.Interface, evictionPolicyGroupVer
 		totalPods += ((float64(podsPercentage) * float64(nodeCapacity.Pods().Value())) / 100)
 
 		// totalCPU capacity to be moved
-		if _, ok := targetThresholds[v1.ResourceCPU]; ok {
-			cpuPercentage := targetThresholds[v1.ResourceCPU] - node.usage[v1.ResourceCPU]
-			totalCpu += ((float64(cpuPercentage) * float64(nodeCapacity.Cpu().MilliValue())) / 100)
-		}
+		cpuPercentage := targetThresholds[v1.ResourceCPU] - node.usage[v1.ResourceCPU]
+		totalCPU += ((float64(cpuPercentage) * float64(nodeCapacity.Cpu().MilliValue())) / 100)
 
 		// totalMem capacity to be moved
-		if _, ok := targetThresholds[v1.ResourceMemory]; ok {
-			memPercentage := targetThresholds[v1.ResourceMemory] - node.usage[v1.ResourceMemory]
-			totalMem += ((float64(memPercentage) * float64(nodeCapacity.Memory().Value())) / 100)
-		}
+		memPercentage := targetThresholds[v1.ResourceMemory] - node.usage[v1.ResourceMemory]
+		totalMem += ((float64(memPercentage) * float64(nodeCapacity.Memory().Value())) / 100)
 	}
 
-	glog.V(1).Infof("Total capacity to be moved: CPU:%v, Mem:%v, Pods:%v", totalCpu, totalMem, totalPods)
-	glog.V(1).Infof("********Number of pods evicted from each node:***********")
+	klog.V(1).Infof("Total capacity to be moved: CPU:%v, Mem:%v, Pods:%v", totalCPU, totalMem, totalPods)
+	klog.V(1).Infof("********Number of pods evicted from each node:***********")
 
 	for _, node := range targetNodes {
 		nodeCapacity := node.node.Status.Capacity
 		if len(node.node.Status.Allocatable) > 0 {
 			nodeCapacity = node.node.Status.Allocatable
 		}
-		glog.V(3).Infof("evicting pods from node %#v with usage: %#v", node.node.Name, node.usage)
-		currentPodsEvicted := nodepodCount[node.node]
+		klog.V(3).Infof("evicting pods from node %#v with usage: %#v", node.node.Name, node.usage)
 
-		// evict best effort pods
-		evictPods(node.bePods, client, evictionPolicyGroupVersion, targetThresholds, nodeCapacity, node.usage, &totalPods, &totalCpu, &totalMem, &currentPodsEvicted, dryRun, maxPodsToEvict)
-		// evict burstable pods
-		evictPods(node.bPods, client, evictionPolicyGroupVersion, targetThresholds, nodeCapacity, node.usage, &totalPods, &totalCpu, &totalMem, &currentPodsEvicted, dryRun, maxPodsToEvict)
-		// evict guaranteed pods
-		evictPods(node.gPods, client, evictionPolicyGroupVersion, targetThresholds, nodeCapacity, node.usage, &totalPods, &totalCpu, &totalMem, &currentPodsEvicted, dryRun, maxPodsToEvict)
-		nodepodCount[node.node] = currentPodsEvicted
-		podsEvicted = podsEvicted + nodepodCount[node.node]
-		glog.V(1).Infof("%v pods evicted from node %#v with usage %v", nodepodCount[node.node], node.node.Name, node.usage)
+		nonRemovablePods, removablePods := classifyPods(node.allPods, podEvictor)
+		klog.V(2).Infof("allPods:%v, nonRemovablePods:%v, removablePods:%v", len(node.allPods), len(nonRemovablePods), len(removablePods))
+
+		if len(removablePods) == 0 {
+			klog.V(1).Infof("no removable pods on node %#v, try next node", node.node.Name)
+			continue
+		}
+
+		klog.V(1).Infof("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)
+
+		klog.V(1).Infof("%v pods evicted from node %#v with usage %v", podEvictor.NodeEvicted(node.node), node.node.Name, node.usage)
 	}
-	return podsEvicted
 }
 
-func evictPods(inputPods []*v1.Pod,
-	client clientset.Interface,
-	evictionPolicyGroupVersion string,
+func evictPods(
+	ctx context.Context,
+	inputPods []*v1.Pod,
 	targetThresholds api.ResourceThresholds,
 	nodeCapacity v1.ResourceList,
 	nodeUsage api.ResourceThresholds,
 	totalPods *float64,
-	totalCpu *float64,
+	totalCPU *float64,
 	totalMem *float64,
-	podsEvicted *int,
-	dryRun bool, maxPodsToEvict int) {
-	if IsNodeAboveTargetUtilization(nodeUsage, targetThresholds) && (*totalPods > 0 || *totalCpu > 0 || *totalMem > 0) {
+	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 {
 		onePodPercentage := api.Percentage((float64(1) * 100) / float64(nodeCapacity.Pods().Value()))
 		for _, pod := range inputPods {
-			if maxPodsToEvict > 0 && *podsEvicted+1 > maxPodsToEvict {
+			if !utils.PodToleratesTaints(pod, taintsOfLowNodes) {
+				klog.V(3).Infof("Skipping eviction for Pod: %#v, doesn't tolerate node taint", pod.Name)
+				continue
+			}
+
+			cUsage := utils.GetResourceRequest(pod, v1.ResourceCPU)
+			mUsage := utils.GetResourceRequest(pod, v1.ResourceMemory)
+
+			success, err := podEvictor.EvictPod(ctx, pod, node, "LowNodeUtilization")
+			if err != nil {
+				klog.Errorf("Error evicting pod: (%#v)", err)
 				break
 			}
-			cUsage := helper.GetResourceRequest(pod, v1.ResourceCPU)
-			mUsage := helper.GetResourceRequest(pod, v1.ResourceMemory)
-			success, err := evictions.EvictPod(client, pod, evictionPolicyGroupVersion, dryRun)
-			if !success {
-				glog.Warningf("Error when evicting pod: %#v (%#v)", pod.Name, err)
-			} else {
-				glog.V(3).Infof("Evicted pod: %#v (%#v)", pod.Name, err)
+
+			if success {
+				klog.V(3).Infof("Evicted pod: %#v", pod.Name)
 				// update remaining pods
-				*podsEvicted++
 				nodeUsage[v1.ResourcePods] -= onePodPercentage
 				*totalPods--
 
 				// update remaining cpu
-				*totalCpu -= float64(cUsage)
+				*totalCPU -= float64(cUsage)
 				nodeUsage[v1.ResourceCPU] -= api.Percentage((float64(cUsage) * 100) / float64(nodeCapacity.Cpu().MilliValue()))
 
 				// update remaining memory
 				*totalMem -= float64(mUsage)
 				nodeUsage[v1.ResourceMemory] -= api.Percentage(float64(mUsage) / float64(nodeCapacity.Memory().Value()) * 100)
 
-				glog.V(3).Infof("updated node usage: %#v", nodeUsage)
-				// check if node utilization drops below target threshold or required capacity (cpu, memory, pods) is moved
-				if !IsNodeAboveTargetUtilization(nodeUsage, targetThresholds) || (*totalPods <= 0 && *totalCpu <= 0 && *totalMem <= 0) {
+				klog.V(3).Infof("updated node usage: %#v", 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 {
 					break
 				}
 			}
@@ -251,7 +303,8 @@ func evictPods(inputPods []*v1.Pod,
 	}
 }
 
-func SortNodesByUsage(nodes []NodeUsageMap) {
+// sortNodesByUsage sorts nodes based on usage in descending order
+func sortNodesByUsage(nodes []NodeUsageMap) {
 	sort.Slice(nodes, func(i, j int) bool {
 		var ti, tj api.Percentage
 		for name, value := range nodes[i].usage {
@@ -269,12 +322,13 @@ func SortNodesByUsage(nodes []NodeUsageMap) {
 	})
 }
 
-func CreateNodePodsMap(client clientset.Interface, nodes []*v1.Node) NodePodsMap {
+// 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(client, node)
+		pods, err := podutil.ListPodsOnANode(ctx, client, node, nil)
 		if err != nil {
-			glog.Warningf("node %s will not be processed, error in accessing its pods (%#v)", node.Name, err)
+			klog.Warningf("node %s will not be processed, error in accessing its pods (%#v)", node.Name, err)
 		} else {
 			npm[node] = pods
 		}
@@ -282,7 +336,8 @@ func CreateNodePodsMap(client clientset.Interface, nodes []*v1.Node) NodePodsMap
 	return npm
 }
 
-func IsNodeAboveTargetUtilization(nodeThresholds api.ResourceThresholds, thresholds api.ResourceThresholds) bool {
+// isNodeAboveTargetUtilization checks if a node is overutilized
+func isNodeAboveTargetUtilization(nodeThresholds api.ResourceThresholds, thresholds api.ResourceThresholds) bool {
 	for name, nodeValue := range nodeThresholds {
 		if name == v1.ResourceCPU || name == v1.ResourceMemory || name == v1.ResourcePods {
 			if value, ok := thresholds[name]; !ok {
@@ -295,7 +350,8 @@ func IsNodeAboveTargetUtilization(nodeThresholds api.ResourceThresholds, thresho
 	return false
 }
 
-func IsNodeWithLowUtilization(nodeThresholds api.ResourceThresholds, thresholds api.ResourceThresholds) bool {
+// isNodeWithLowUtilization checks if a node is underutilized
+func isNodeWithLowUtilization(nodeThresholds api.ResourceThresholds, thresholds api.ResourceThresholds) bool {
 	for name, nodeValue := range nodeThresholds {
 		if name == v1.ResourceCPU || name == v1.ResourceMemory || name == v1.ResourcePods {
 			if value, ok := thresholds[name]; !ok {
@@ -308,37 +364,18 @@ func IsNodeWithLowUtilization(nodeThresholds api.ResourceThresholds, thresholds
 	return true
 }
 
-func NodeUtilization(node *v1.Node, pods []*v1.Pod) (api.ResourceThresholds, []*v1.Pod, []*v1.Pod, []*v1.Pod, []*v1.Pod, []*v1.Pod) {
-	bePods := []*v1.Pod{}
-	nonRemovablePods := []*v1.Pod{}
-	bPods := []*v1.Pod{}
-	gPods := []*v1.Pod{}
-	totalReqs := map[v1.ResourceName]resource.Quantity{}
+func nodeUtilization(node *v1.Node, pods []*v1.Pod) api.ResourceThresholds {
+	totalReqs := map[v1.ResourceName]*resource.Quantity{
+		v1.ResourceCPU:    {},
+		v1.ResourceMemory: {},
+	}
 	for _, pod := range pods {
-		// We need to compute the usage of nonRemovablePods unless it is a best effort pod. So, cannot use podutil.ListEvictablePodsOnNode
-		if !podutil.IsEvictable(pod) {
-			nonRemovablePods = append(nonRemovablePods, pod)
-			if podutil.IsBestEffortPod(pod) {
-				continue
-			}
-		} else if podutil.IsBestEffortPod(pod) {
-			bePods = append(bePods, pod)
-			continue
-		} else if podutil.IsBurstablePod(pod) {
-			bPods = append(bPods, pod)
-		} else {
-			gPods = append(gPods, pod)
-		}
-
-		req, _ := helper.PodRequestsAndLimits(pod)
+		req, _ := utils.PodRequestsAndLimits(pod)
 		for name, quantity := range req {
 			if name == v1.ResourceCPU || name == v1.ResourceMemory {
-				if value, ok := totalReqs[name]; !ok {
-					totalReqs[name] = *quantity.Copy()
-				} else {
-					value.Add(quantity)
-					totalReqs[name] = value
-				}
+				// As Quantity.Add says: Add adds the provided y quantity to the current value. If the current value is zero,
+				// the format of the quantity will be updated to the format of y.
+				totalReqs[name].Add(quantity)
 			}
 		}
 	}
@@ -348,12 +385,24 @@ func NodeUtilization(node *v1.Node, pods []*v1.Pod) (api.ResourceThresholds, []*
 		nodeCapacity = node.Status.Allocatable
 	}
 
-	usage := api.ResourceThresholds{}
-	totalCPUReq := totalReqs[v1.ResourceCPU]
-	totalMemReq := totalReqs[v1.ResourceMemory]
 	totalPods := len(pods)
-	usage[v1.ResourceCPU] = api.Percentage((float64(totalCPUReq.MilliValue()) * 100) / float64(nodeCapacity.Cpu().MilliValue()))
-	usage[v1.ResourceMemory] = api.Percentage(float64(totalMemReq.Value()) / float64(nodeCapacity.Memory().Value()) * 100)
-	usage[v1.ResourcePods] = api.Percentage((float64(totalPods) * 100) / float64(nodeCapacity.Pods().Value()))
-	return usage, pods, nonRemovablePods, bePods, bPods, gPods
+	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) {
+	var nonRemovablePods, removablePods []*v1.Pod
+
+	for _, pod := range pods {
+		if !evictor.IsEvictable(pod) {
+			nonRemovablePods = append(nonRemovablePods, pod)
+		} else {
+			removablePods = append(removablePods, pod)
+		}
+	}
+
+	return nonRemovablePods, removablePods
 }

pkg/descheduler/strategies/lownodeutilization_test.go

@@ -17,130 +17,575 @@ limitations under the License.
 package strategies
 
 import (
+	"context"
 	"fmt"
 	"strings"
 	"testing"
 
-	"github.com/kubernetes-incubator/descheduler/pkg/api"
-	"github.com/kubernetes-incubator/descheduler/test"
-	"k8s.io/api/core/v1"
+	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"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	"sigs.k8s.io/descheduler/pkg/utils"
+	"sigs.k8s.io/descheduler/test"
+)
+
+var (
+	lowPriority  = int32(0)
+	highPriority = int32(10000)
 )
 
-// TODO: Make this table driven.
 func TestLowNodeUtilization(t *testing.T) {
-	var thresholds = make(api.ResourceThresholds)
-	var targetThresholds = make(api.ResourceThresholds)
-	thresholds[v1.ResourceCPU] = 30
-	thresholds[v1.ResourcePods] = 30
-	targetThresholds[v1.ResourceCPU] = 50
-	targetThresholds[v1.ResourcePods] = 50
+	ctx := context.Background()
+	n1NodeName := "n1"
+	n2NodeName := "n2"
+	n3NodeName := "n3"
 
-	n1 := test.BuildTestNode("n1", 4000, 3000, 9)
-	n2 := test.BuildTestNode("n2", 4000, 3000, 10)
-	n3 := test.BuildTestNode("n3", 4000, 3000, 10)
-	// Making n3 node unschedulable so that it won't counted in lowUtilized nodes list.
-	n3.Spec.Unschedulable = true
-	p1 := test.BuildTestPod("p1", 400, 0, n1.Name)
-	p2 := test.BuildTestPod("p2", 400, 0, n1.Name)
-	p3 := test.BuildTestPod("p3", 400, 0, n1.Name)
-	p4 := test.BuildTestPod("p4", 400, 0, n1.Name)
-	p5 := test.BuildTestPod("p5", 400, 0, n1.Name)
-
-	// These won't be evicted.
-	p6 := test.BuildTestPod("p6", 400, 0, n1.Name)
-	p7 := test.BuildTestPod("p7", 400, 0, n1.Name)
-	p8 := test.BuildTestPod("p8", 400, 0, n1.Name)
-
-	p1.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	p2.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	p3.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	p4.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	p5.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	// The following 4 pods won't get evicted.
-	// A daemonset.
-	p6.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
-	// A pod with local storage.
-	p7.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
-	p7.Spec.Volumes = []v1.Volume{
+	testCases := []struct {
+		name                         string
+		thresholds, targetThresholds api.ResourceThresholds
+		nodes                        map[string]*v1.Node
+		pods                         map[string]*v1.PodList
+		maxPodsToEvictPerNode        int
+		expectedPodsEvicted          int
+		evictedPods                  []string
+	}{
 		{
-			Name: "sample",
-			VolumeSource: v1.VolumeSource{
-				HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
-				EmptyDir: &v1.EmptyDirVolumeSource{
-					SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+			name: "no evictable pods",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  30,
+				v1.ResourcePods: 30,
 			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  50,
+				v1.ResourcePods: 50,
+			},
+			nodes: map[string]*v1.Node{
+				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			},
+			pods: map[string]*v1.PodList{
+				n1NodeName: {
+					Items: []v1.Pod{
+						// These won't be evicted.
+						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetDSOwnerRef),
+						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetDSOwnerRef),
+						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetDSOwnerRef),
+						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
+						*test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							// A pod with local storage.
+							test.SetNormalOwnerRef(pod)
+							pod.Spec.Volumes = []v1.Volume{
+								{
+									Name: "sample",
+									VolumeSource: v1.VolumeSource{
+										HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+										EmptyDir: &v1.EmptyDirVolumeSource{
+											SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+									},
+								},
+							}
+							// A Mirror Pod.
+							pod.Annotations = test.GetMirrorPodAnnotation()
+						}),
+						*test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							// A Critical Pod.
+							pod.Namespace = "kube-system"
+							priority := utils.SystemCriticalPriority
+							pod.Spec.Priority = &priority
+						}),
+					},
+				},
+				n2NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p9", 400, 0, n1NodeName, test.SetRSOwnerRef),
+					},
+				},
+				n3NodeName: {},
+			},
+			maxPodsToEvictPerNode: 0,
+			expectedPodsEvicted:   0,
+		},
+		{
+			name: "without priorities",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  30,
+				v1.ResourcePods: 30,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  50,
+				v1.ResourcePods: 50,
+			},
+			nodes: map[string]*v1.Node{
+				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			},
+			pods: map[string]*v1.PodList{
+				n1NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p5", 400, 0, n1NodeName, test.SetRSOwnerRef),
+						// These won't be evicted.
+						*test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
+						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							// A pod with local storage.
+							test.SetNormalOwnerRef(pod)
+							pod.Spec.Volumes = []v1.Volume{
+								{
+									Name: "sample",
+									VolumeSource: v1.VolumeSource{
+										HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+										EmptyDir: &v1.EmptyDirVolumeSource{
+											SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+									},
+								},
+							}
+							// A Mirror Pod.
+							pod.Annotations = test.GetMirrorPodAnnotation()
+						}),
+						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							// A Critical Pod.
+							pod.Namespace = "kube-system"
+							priority := utils.SystemCriticalPriority
+							pod.Spec.Priority = &priority
+						}),
+					},
+				},
+				n2NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p9", 400, 0, n1NodeName, test.SetRSOwnerRef),
+					},
+				},
+				n3NodeName: {},
+			},
+			maxPodsToEvictPerNode: 0,
+			expectedPodsEvicted:   4,
+		},
+		{
+			name: "without priorities stop when cpu capacity is depleted",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  30,
+				v1.ResourcePods: 30,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  50,
+				v1.ResourcePods: 50,
+			},
+			nodes: map[string]*v1.Node{
+				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			},
+			pods: map[string]*v1.PodList{
+				n1NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p1", 400, 300, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p2", 400, 300, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p3", 400, 300, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p4", 400, 300, n1NodeName, test.SetRSOwnerRef),
+						*test.BuildTestPod("p5", 400, 300, n1NodeName, test.SetRSOwnerRef),
+						// These won't be evicted.
+						*test.BuildTestPod("p6", 400, 300, n1NodeName, test.SetDSOwnerRef),
+						*test.BuildTestPod("p7", 400, 300, n1NodeName, func(pod *v1.Pod) {
+							// A pod with local storage.
+							test.SetNormalOwnerRef(pod)
+							pod.Spec.Volumes = []v1.Volume{
+								{
+									Name: "sample",
+									VolumeSource: v1.VolumeSource{
+										HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+										EmptyDir: &v1.EmptyDirVolumeSource{
+											SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+									},
+								},
+							}
+							// A Mirror Pod.
+							pod.Annotations = test.GetMirrorPodAnnotation()
+						}),
+						*test.BuildTestPod("p8", 400, 300, n1NodeName, func(pod *v1.Pod) {
+							// A Critical Pod.
+							pod.Namespace = "kube-system"
+							priority := utils.SystemCriticalPriority
+							pod.Spec.Priority = &priority
+						}),
+					},
+				},
+				n2NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p9", 400, 2100, n1NodeName, test.SetRSOwnerRef),
+					},
+				},
+				n3NodeName: {},
+			},
+			maxPodsToEvictPerNode: 0,
+			// 4 pods available for eviction based on v1.ResourcePods, only 3 pods can be evicted before cpu is depleted
+			expectedPodsEvicted: 3,
+		},
+		{
+			name: "with priorities",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  30,
+				v1.ResourcePods: 30,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  50,
+				v1.ResourcePods: 50,
+			},
+			nodes: map[string]*v1.Node{
+				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			},
+			pods: map[string]*v1.PodList{
+				n1NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.SetPodPriority(pod, highPriority)
+						}),
+						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.SetPodPriority(pod, highPriority)
+						}),
+						*test.BuildTestPod("p3", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.SetPodPriority(pod, highPriority)
+						}),
+						*test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.SetPodPriority(pod, highPriority)
+						}),
+						*test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.SetPodPriority(pod, lowPriority)
+						}),
+						// These won't be evicted.
+						*test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetDSOwnerRef(pod)
+							test.SetPodPriority(pod, highPriority)
+						}),
+						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							// A pod with local storage.
+							test.SetNormalOwnerRef(pod)
+							test.SetPodPriority(pod, lowPriority)
+							pod.Spec.Volumes = []v1.Volume{
+								{
+									Name: "sample",
+									VolumeSource: v1.VolumeSource{
+										HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+										EmptyDir: &v1.EmptyDirVolumeSource{
+											SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+									},
+								},
+							}
+							// A Mirror Pod.
+							pod.Annotations = test.GetMirrorPodAnnotation()
+						}),
+						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							// A Critical Pod.
+							pod.Namespace = "kube-system"
+							priority := utils.SystemCriticalPriority
+							pod.Spec.Priority = &priority
+						}),
+					},
+				},
+				n2NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p9", 400, 0, n1NodeName, test.SetRSOwnerRef),
+					},
+				},
+				n3NodeName: {},
+			},
+			maxPodsToEvictPerNode: 0,
+			expectedPodsEvicted:   4,
+		},
+		{
+			name: "without priorities evicting best-effort pods only",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  30,
+				v1.ResourcePods: 30,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  50,
+				v1.ResourcePods: 50,
+			},
+			nodes: map[string]*v1.Node{
+				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			},
+			// All pods are assumed to be burstable (test.BuildTestNode always sets both cpu/memory resource requests to some value)
+			pods: map[string]*v1.PodList{
+				n1NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.MakeBestEffortPod(pod)
+						}),
+						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.MakeBestEffortPod(pod)
+						}),
+						*test.BuildTestPod("p3", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+						}),
+						*test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.MakeBestEffortPod(pod)
+						}),
+						*test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetRSOwnerRef(pod)
+							test.MakeBestEffortPod(pod)
+						}),
+						// These won't be evicted.
+						*test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							test.SetDSOwnerRef(pod)
+						}),
+						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							// A pod with local storage.
+							test.SetNormalOwnerRef(pod)
+							pod.Spec.Volumes = []v1.Volume{
+								{
+									Name: "sample",
+									VolumeSource: v1.VolumeSource{
+										HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+										EmptyDir: &v1.EmptyDirVolumeSource{
+											SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+									},
+								},
+							}
+							// A Mirror Pod.
+							pod.Annotations = test.GetMirrorPodAnnotation()
+						}),
+						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+							// A Critical Pod.
+							pod.Namespace = "kube-system"
+							priority := utils.SystemCriticalPriority
+							pod.Spec.Priority = &priority
+						}),
+					},
+				},
+				n2NodeName: {
+					Items: []v1.Pod{
+						*test.BuildTestPod("p9", 400, 0, n1NodeName, test.SetRSOwnerRef),
+					},
+				},
+				n3NodeName: {},
+			},
+			maxPodsToEvictPerNode: 0,
+			expectedPodsEvicted:   4,
+			evictedPods:           []string{"p1", "p2", "p4", "p5"},
 		},
 	}
-	// A Mirror Pod.
-	p7.Annotations = test.GetMirrorPodAnnotation()
-	// A Critical Pod.
-	p8.Namespace = "kube-system"
-	p8.Annotations = test.GetCriticalPodAnnotation()
-	p9 := test.BuildTestPod("p9", 400, 0, n1.Name)
-	p9.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
-	fakeClient := &fake.Clientset{}
-	fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-		list := action.(core.ListAction)
-		fieldString := list.GetListRestrictions().Fields.String()
-		if strings.Contains(fieldString, "n1") {
-			return true, &v1.PodList{Items: []v1.Pod{*p1, *p2, *p3, *p4, *p5, *p6, *p7, *p8}}, nil
-		}
-		if strings.Contains(fieldString, "n2") {
-			return true, &v1.PodList{Items: []v1.Pod{*p9}}, nil
-		}
-		if strings.Contains(fieldString, "n3") {
-			return true, &v1.PodList{Items: []v1.Pod{}}, nil
-		}
-		return true, nil, fmt.Errorf("Failed to list: %v", list)
-	})
-	fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
-		getAction := action.(core.GetAction)
-		switch getAction.GetName() {
-		case n1.Name:
-			return true, n1, nil
-		case n2.Name:
-			return true, n2, nil
-		case n3.Name:
-			return true, n3, nil
-		}
-		return true, nil, fmt.Errorf("Wrong node: %v", getAction.GetName())
-	})
-	expectedPodsEvicted := 3
-	npm := CreateNodePodsMap(fakeClient, []*v1.Node{n1, n2, n3})
-	lowNodes, targetNodes := classifyNodes(npm, thresholds, targetThresholds)
-	if len(lowNodes) != 1 {
-		t.Errorf("After ignoring unschedulable nodes, expected only one node to be under utilized.")
+
+	for _, test := range testCases {
+		t.Run(test.name, func(t *testing.T) {
+			fakeClient := &fake.Clientset{}
+			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
+				list := action.(core.ListAction)
+				fieldString := list.GetListRestrictions().Fields.String()
+				if strings.Contains(fieldString, n1NodeName) {
+					return true, test.pods[n1NodeName], nil
+				}
+				if strings.Contains(fieldString, n2NodeName) {
+					return true, test.pods[n2NodeName], nil
+				}
+				if strings.Contains(fieldString, n3NodeName) {
+					return true, test.pods[n3NodeName], nil
+				}
+				return true, nil, fmt.Errorf("Failed to list: %v", list)
+			})
+			fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
+				getAction := action.(core.GetAction)
+				if node, exists := test.nodes[getAction.GetName()]; exists {
+					return true, node, nil
+				}
+				return true, nil, fmt.Errorf("Wrong node: %v", getAction.GetName())
+			})
+			podsForEviction := make(map[string]struct{})
+			for _, pod := range test.evictedPods {
+				podsForEviction[pod] = struct{}{}
+			}
+
+			evictionFailed := false
+			if len(test.evictedPods) > 0 {
+				fakeClient.Fake.AddReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
+					getAction := action.(core.CreateAction)
+					obj := getAction.GetObject()
+					if eviction, ok := obj.(*v1beta1.Eviction); ok {
+						if _, exists := podsForEviction[eviction.Name]; exists {
+							return true, obj, nil
+						}
+						evictionFailed = true
+						return true, nil, fmt.Errorf("pod %q was unexpectedly evicted", eviction.Name)
+					}
+					return true, obj, nil
+				})
+			}
+
+			var nodes []*v1.Node
+			for _, node := range test.nodes {
+				nodes = append(nodes, node)
+			}
+
+			podEvictor := evictions.NewPodEvictor(
+				fakeClient,
+				"v1",
+				false,
+				test.maxPodsToEvictPerNode,
+				nodes,
+				false,
+			)
+
+			strategy := api.DeschedulerStrategy{
+				Enabled: true,
+				Params: &api.StrategyParameters{
+					NodeResourceUtilizationThresholds: &api.NodeResourceUtilizationThresholds{
+						Thresholds:       test.thresholds,
+						TargetThresholds: test.targetThresholds,
+					},
+				},
+			}
+			LowNodeUtilization(ctx, fakeClient, strategy, nodes, podEvictor)
+
+			podsEvicted := podEvictor.TotalEvicted()
+			if test.expectedPodsEvicted != podsEvicted {
+				t.Errorf("Expected %#v pods to be evicted but %#v got evicted", test.expectedPodsEvicted, podsEvicted)
+			}
+			if evictionFailed {
+				t.Errorf("Pod evictions failed unexpectedly")
+			}
+		})
 	}
-	npe := nodePodEvictedCount{}
-	npe[n1] = 0
-	npe[n2] = 0
-	npe[n3] = 0
-	podsEvicted := evictPodsFromTargetNodes(fakeClient, "v1", targetNodes, lowNodes, targetThresholds, false, 3, npe)
-	if expectedPodsEvicted != podsEvicted {
-		t.Errorf("Expected %#v pods to be evicted but %#v got evicted", expectedPodsEvicted, podsEvicted)
+}
+
+func TestValidateStrategyConfig(t *testing.T) {
+	tests := []struct {
+		name             string
+		thresholds       api.ResourceThresholds
+		targetThresholds api.ResourceThresholds
+		errInfo          error
+	}{
+		{
+			name: "passing invalid thresholds",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    20,
+				v1.ResourceMemory: 120,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    80,
+				v1.ResourceMemory: 80,
+			},
+			errInfo: fmt.Errorf("thresholds config is not valid: %v", fmt.Errorf(
+				"%v threshold not in [%v, %v] range", v1.ResourceMemory, MinResourcePercentage, MaxResourcePercentage)),
+		},
+		{
+			name: "passing invalid targetThresholds",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    20,
+				v1.ResourceMemory: 20,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    80,
+				"resourceInvalid": 80,
+			},
+			errInfo: fmt.Errorf("targetThresholds config is not valid: %v",
+				fmt.Errorf("only cpu, memory, or pods thresholds can be specified")),
+		},
+		{
+			name: "thresholds and targetThresholds configured different num of resources",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    20,
+				v1.ResourceMemory: 20,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    80,
+				v1.ResourceMemory: 80,
+				v1.ResourcePods:   80,
+			},
+			errInfo: fmt.Errorf("thresholds and targetThresholds configured different resources"),
+		},
+		{
+			name: "thresholds and targetThresholds configured different resources",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    20,
+				v1.ResourceMemory: 20,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:  80,
+				v1.ResourcePods: 80,
+			},
+			errInfo: fmt.Errorf("thresholds and targetThresholds configured different resources"),
+		},
+		{
+			name: "thresholds' CPU config value is greater than targetThresholds'",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    90,
+				v1.ResourceMemory: 20,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    80,
+				v1.ResourceMemory: 80,
+			},
+			errInfo: fmt.Errorf("thresholds' %v percentage is greater than targetThresholds'", v1.ResourceCPU),
+		},
+		{
+			name: "passing valid strategy config",
+			thresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    20,
+				v1.ResourceMemory: 20,
+			},
+			targetThresholds: api.ResourceThresholds{
+				v1.ResourceCPU:    80,
+				v1.ResourceMemory: 80,
+			},
+			errInfo: nil,
+		},
 	}
 
+	for _, testCase := range tests {
+		validateErr := validateStrategyConfig(testCase.thresholds, testCase.targetThresholds)
+
+		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",
+					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",
+				testCase.thresholds, testCase.targetThresholds, testCase.errInfo, validateErr)
+		}
+	}
 }
 
 func TestValidateThresholds(t *testing.T) {
 	tests := []struct {
 		name    string
 		input   api.ResourceThresholds
-		succeed bool
+		errInfo error
 	}{
 		{
 			name:    "passing nil map for threshold",
 			input:   nil,
-			succeed: false,
+			errInfo: fmt.Errorf("no resource threshold is configured"),
 		},
 		{
 			name:    "passing no threshold",
 			input:   api.ResourceThresholds{},
-			succeed: false,
+			errInfo: fmt.Errorf("no resource threshold is configured"),
 		},
 		{
 			name: "passing unsupported resource name",
@@ -148,7 +593,7 @@ func TestValidateThresholds(t *testing.T) {
 				v1.ResourceCPU:     40,
 				v1.ResourceStorage: 25.5,
 			},
-			succeed: false,
+			errInfo: fmt.Errorf("only cpu, memory, or pods thresholds can be specified"),
 		},
 		{
 			name: "passing invalid resource name",
@@ -156,7 +601,30 @@ func TestValidateThresholds(t *testing.T) {
 				v1.ResourceCPU: 40,
 				"coolResource": 42.0,
 			},
-			succeed: false,
+			errInfo: fmt.Errorf("only cpu, memory, or pods thresholds can be specified"),
+		},
+		{
+			name: "passing invalid resource value",
+			input: api.ResourceThresholds{
+				v1.ResourceCPU:    110,
+				v1.ResourceMemory: 80,
+			},
+			errInfo: fmt.Errorf("%v threshold not in [%v, %v] range", v1.ResourceCPU, MinResourcePercentage, MaxResourcePercentage),
+		},
+		{
+			name: "passing a valid threshold with max and min resource value",
+			input: api.ResourceThresholds{
+				v1.ResourceCPU:    100,
+				v1.ResourceMemory: 0,
+			},
+			errInfo: nil,
+		},
+		{
+			name: "passing a valid threshold with only cpu",
+			input: api.ResourceThresholds{
+				v1.ResourceCPU: 80,
+			},
+			errInfo: nil,
 		},
 		{
 			name: "passing a valid threshold with cpu, memory and pods",
@@ -165,15 +633,200 @@ func TestValidateThresholds(t *testing.T) {
 				v1.ResourceMemory: 30,
 				v1.ResourcePods:   40,
 			},
-			succeed: true,
+			errInfo: nil,
 		},
 	}
 
 	for _, test := range tests {
-		isValid := validateThresholds(test.input)
+		validateErr := validateThresholds(test.input)
 
-		if isValid != test.succeed {
-			t.Errorf("expected validity of threshold: %#v\nto be %v but got %v instead", test.input, test.succeed, isValid)
+		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)
+			}
+		} 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)
 		}
 	}
 }
+
+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{
+		Enabled: true,
+		Params: &api.StrategyParameters{
+			NodeResourceUtilizationThresholds: &api.NodeResourceUtilizationThresholds{
+				Thresholds: api.ResourceThresholds{
+					v1.ResourcePods: 20,
+				},
+				TargetThresholds: api.ResourceThresholds{
+					v1.ResourcePods: 70,
+				},
+			},
+		},
+	}
+
+	n1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
+	n2 := test.BuildTestNode("n2", 1000, 3000, 10, nil)
+	n3 := test.BuildTestNode("n3", 1000, 3000, 10, nil)
+	n3withTaints := n3.DeepCopy()
+	n3withTaints.Spec.Taints = []v1.Taint{
+		{
+			Key:    "key",
+			Value:  "value",
+			Effect: v1.TaintEffectNoSchedule,
+		},
+	}
+
+	podThatToleratesTaint := test.BuildTestPod("tolerate_pod", 200, 0, n1.Name, test.SetRSOwnerRef)
+	podThatToleratesTaint.Spec.Tolerations = []v1.Toleration{
+		{
+			Key:   "key",
+			Value: "value",
+		},
+	}
+
+	tests := []struct {
+		name              string
+		nodes             []*v1.Node
+		pods              []*v1.Pod
+		evictionsExpected int
+	}{
+		{
+			name:  "No taints",
+			nodes: []*v1.Node{n1, n2, n3},
+			pods: []*v1.Pod{
+				//Node 1 pods
+				test.BuildTestPod(fmt.Sprintf("pod_1_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_2_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_3_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_4_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_5_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_6_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_7_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_8_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				// Node 2 pods
+				test.BuildTestPod(fmt.Sprintf("pod_9_%s", n2.Name), 200, 0, n2.Name, test.SetRSOwnerRef),
+			},
+			evictionsExpected: 1,
+		},
+		{
+			name:  "No pod tolerates node taint",
+			nodes: []*v1.Node{n1, n3withTaints},
+			pods: []*v1.Pod{
+				//Node 1 pods
+				test.BuildTestPod(fmt.Sprintf("pod_1_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_2_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_3_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_4_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_5_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_6_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_7_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_8_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				// Node 3 pods
+				test.BuildTestPod(fmt.Sprintf("pod_9_%s", n3withTaints.Name), 200, 0, n3withTaints.Name, test.SetRSOwnerRef),
+			},
+			evictionsExpected: 0,
+		},
+		{
+			name:  "Pod which tolerates node taint",
+			nodes: []*v1.Node{n1, n3withTaints},
+			pods: []*v1.Pod{
+				//Node 1 pods
+				test.BuildTestPod(fmt.Sprintf("pod_1_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_2_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_3_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_4_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_5_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_6_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				test.BuildTestPod(fmt.Sprintf("pod_7_%s", n1.Name), 200, 0, n1.Name, test.SetRSOwnerRef),
+				podThatToleratesTaint,
+				// Node 3 pods
+				test.BuildTestPod(fmt.Sprintf("pod_9_%s", n3withTaints.Name), 200, 0, n3withTaints.Name, test.SetRSOwnerRef),
+			},
+			evictionsExpected: 1,
+		},
+	}
+
+	for _, item := range tests {
+		t.Run(item.name, func(t *testing.T) {
+			var objs []runtime.Object
+			for _, node := range item.nodes {
+				objs = append(objs, node)
+			}
+
+			for _, pod := range item.pods {
+				objs = append(objs, pod)
+			}
+
+			fakePtr := newFake(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},
+				"policy/v1",
+				false,
+				item.evictionsExpected,
+				item.nodes,
+				false,
+			)
+
+			LowNodeUtilization(ctx, &fake.Clientset{Fake: *fakePtr}, strategy, item.nodes, podEvictor)
+
+			if item.evictionsExpected != evictionCounter {
+				t.Errorf("Expected %v evictions, got %v", item.evictionsExpected, evictionCounter)
+			}
+		})
+	}
+}

pkg/descheduler/strategies/node_affinity.go

@@ -17,58 +17,54 @@ limitations under the License.
 package strategies
 
 import (
-	"github.com/golang/glog"
-	"github.com/kubernetes-incubator/descheduler/cmd/descheduler/app/options"
-	"github.com/kubernetes-incubator/descheduler/pkg/api"
-	"github.com/kubernetes-incubator/descheduler/pkg/descheduler/evictions"
-	nodeutil "github.com/kubernetes-incubator/descheduler/pkg/descheduler/node"
-	podutil "github.com/kubernetes-incubator/descheduler/pkg/descheduler/pod"
-	"k8s.io/api/core/v1"
+	"context"
+
+	v1 "k8s.io/api/core/v1"
+	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/klog/v2"
+
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 )
 
-func RemovePodsViolatingNodeAffinity(ds *options.DeschedulerServer, strategy api.DeschedulerStrategy, evictionPolicyGroupVersion string, nodes []*v1.Node, nodePodCount nodePodEvictedCount) {
-	removePodsViolatingNodeAffinityCount(ds, strategy, evictionPolicyGroupVersion, nodes, nodePodCount, ds.MaxNoOfPodsToEvictPerNode)
-}
-
-func removePodsViolatingNodeAffinityCount(ds *options.DeschedulerServer, strategy api.DeschedulerStrategy, evictionPolicyGroupVersion string, nodes []*v1.Node, nodepodCount nodePodEvictedCount, maxPodsToEvict int) int {
-	evictedPodCount := 0
-	if !strategy.Enabled {
-		return evictedPodCount
+// 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 {
+		klog.V(1).Infof("NodeAffinityType not set")
+		return
 	}
-
 	for _, nodeAffinity := range strategy.Params.NodeAffinityType {
-		glog.V(2).Infof("Executing for nodeAffinityType: %v", nodeAffinity)
+		klog.V(2).Infof("Executing for nodeAffinityType: %v", nodeAffinity)
 
 		switch nodeAffinity {
 		case "requiredDuringSchedulingIgnoredDuringExecution":
 			for _, node := range nodes {
-				glog.V(1).Infof("Processing node: %#v\n", node.Name)
+				klog.V(1).Infof("Processing node: %#v\n", node.Name)
 
-				pods, err := podutil.ListEvictablePodsOnNode(ds.Client, node)
+				pods, err := podutil.ListPodsOnANode(ctx, client, node, func(pod *v1.Pod) bool {
+					return podEvictor.IsEvictable(pod) &&
+						!nodeutil.PodFitsCurrentNode(pod, node) &&
+						nodeutil.PodFitsAnyNode(pod, nodes)
+				})
 				if err != nil {
-					glog.Errorf("failed to get pods from %v: %v", node.Name, err)
+					klog.Errorf("failed to get pods from %v: %v", node.Name, err)
 				}
 
 				for _, pod := range pods {
-					if maxPodsToEvict > 0 && nodepodCount[node]+1 > maxPodsToEvict {
-						break
-					}
 					if pod.Spec.Affinity != nil && pod.Spec.Affinity.NodeAffinity != nil && pod.Spec.Affinity.NodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution != nil {
-
-						if !nodeutil.PodFitsCurrentNode(pod, node) && nodeutil.PodFitsAnyNode(pod, nodes) {
-							glog.V(1).Infof("Evicting pod: %v", pod.Name)
-							evictions.EvictPod(ds.Client, pod, evictionPolicyGroupVersion, ds.DryRun)
-							nodepodCount[node]++
+						klog.V(1).Infof("Evicting pod: %v", pod.Name)
+						if _, err := podEvictor.EvictPod(ctx, pod, node, "NodeAffinity"); err != nil {
+							klog.Errorf("Error evicting pod: (%#v)", err)
+							break
 						}
 					}
 				}
-				evictedPodCount += nodepodCount[node]
 			}
 		default:
-			glog.Errorf("invalid nodeAffinityType: %v", nodeAffinity)
-			return evictedPodCount
+			klog.Errorf("invalid nodeAffinityType: %v", nodeAffinity)
 		}
 	}
-	glog.V(1).Infof("Evicted %v pods", evictedPodCount)
-	return evictedPodCount
+	klog.V(1).Infof("Evicted %v pods", podEvictor.TotalEvicted())
 }

pkg/descheduler/strategies/node_affinity_test.go

@@ -17,22 +17,23 @@ limitations under the License.
 package strategies
 
 import (
+	"context"
 	"testing"
 
-	"github.com/kubernetes-incubator/descheduler/cmd/descheduler/app/options"
-	"github.com/kubernetes-incubator/descheduler/pkg/api"
-	"github.com/kubernetes-incubator/descheduler/test"
 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	"sigs.k8s.io/descheduler/test"
 )
 
 func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
-
+	ctx := context.Background()
 	requiredDuringSchedulingIgnoredDuringExecutionStrategy := api.DeschedulerStrategy{
 		Enabled: true,
-		Params: api.StrategyParameters{
+		Params: &api.StrategyParameters{
 			NodeAffinityType: []string{
 				"requiredDuringSchedulingIgnoredDuringExecution",
 			},
@@ -41,17 +42,17 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 
 	nodeLabelKey := "kubernetes.io/desiredNode"
 	nodeLabelValue := "yes"
-	nodeWithLabels := test.BuildTestNode("nodeWithLabels", 2000, 3000, 10)
+	nodeWithLabels := test.BuildTestNode("nodeWithLabels", 2000, 3000, 10, nil)
 	nodeWithLabels.Labels[nodeLabelKey] = nodeLabelValue
 
-	nodeWithoutLabels := test.BuildTestNode("nodeWithoutLabels", 2000, 3000, 10)
+	nodeWithoutLabels := test.BuildTestNode("nodeWithoutLabels", 2000, 3000, 10, nil)
 
-	unschedulableNodeWithLabels := test.BuildTestNode("unschedulableNodeWithLabels", 2000, 3000, 10)
+	unschedulableNodeWithLabels := test.BuildTestNode("unschedulableNodeWithLabels", 2000, 3000, 10, nil)
 	nodeWithLabels.Labels[nodeLabelKey] = nodeLabelValue
 	unschedulableNodeWithLabels.Spec.Unschedulable = true
 
 	addPodsToNode := func(node *v1.Node) []v1.Pod {
-		podWithNodeAffinity := test.BuildTestPod("podWithNodeAffinity", 100, 0, node.Name)
+		podWithNodeAffinity := test.BuildTestPod("podWithNodeAffinity", 100, 0, node.Name, nil)
 		podWithNodeAffinity.Spec.Affinity = &v1.Affinity{
 			NodeAffinity: &v1.NodeAffinity{
 				RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
@@ -72,8 +73,8 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 			},
 		}
 
-		pod1 := test.BuildTestPod("pod1", 100, 0, node.Name)
-		pod2 := test.BuildTestPod("pod2", 100, 0, node.Name)
+		pod1 := test.BuildTestPod("pod1", 100, 0, node.Name, nil)
+		pod2 := test.BuildTestPod("pod2", 100, 0, node.Name, nil)
 
 		podWithNodeAffinity.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
 		pod1.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
@@ -92,49 +93,30 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 		pods                    []v1.Pod
 		strategy                api.DeschedulerStrategy
 		expectedEvictedPodCount int
-		npe                     nodePodEvictedCount
-		maxPodsToEvict          int
+		maxPodsToEvictPerNode   int
 	}{
-		{
-			description: "Strategy disabled, should not evict any pods",
-			strategy: api.DeschedulerStrategy{
-				Enabled: false,
-				Params: api.StrategyParameters{
-					NodeAffinityType: []string{
-						"requiredDuringSchedulingIgnoredDuringExecution",
-					},
-				},
-			},
-			expectedEvictedPodCount: 0,
-			pods:           addPodsToNode(nodeWithoutLabels),
-			nodes:          []*v1.Node{nodeWithoutLabels, nodeWithLabels},
-			npe:            nodePodEvictedCount{nodeWithoutLabels: 0, nodeWithLabels: 0},
-			maxPodsToEvict: 0,
-		},
 		{
 			description: "Invalid strategy type, should not evict any pods",
 			strategy: api.DeschedulerStrategy{
 				Enabled: true,
-				Params: api.StrategyParameters{
+				Params: &api.StrategyParameters{
 					NodeAffinityType: []string{
 						"requiredDuringSchedulingRequiredDuringExecution",
 					},
 				},
 			},
 			expectedEvictedPodCount: 0,
-			pods:           addPodsToNode(nodeWithoutLabels),
-			nodes:          []*v1.Node{nodeWithoutLabels, nodeWithLabels},
-			npe:            nodePodEvictedCount{nodeWithoutLabels: 0, nodeWithLabels: 0},
-			maxPodsToEvict: 0,
+			pods:                    addPodsToNode(nodeWithoutLabels),
+			nodes:                   []*v1.Node{nodeWithoutLabels, nodeWithLabels},
+			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Pod is correctly scheduled on node, no eviction expected",
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionStrategy,
 			expectedEvictedPodCount: 0,
-			pods:           addPodsToNode(nodeWithLabels),
-			nodes:          []*v1.Node{nodeWithLabels},
-			npe:            nodePodEvictedCount{nodeWithLabels: 0},
-			maxPodsToEvict: 0,
+			pods:                    addPodsToNode(nodeWithLabels),
+			nodes:                   []*v1.Node{nodeWithLabels},
+			maxPodsToEvictPerNode:   0,
 		},
 		{
 			description:             "Pod is scheduled on node without matching labels, another schedulable node available, should be evicted",
@@ -142,17 +124,15 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionStrategy,
 			pods:                    addPodsToNode(nodeWithoutLabels),
 			nodes:                   []*v1.Node{nodeWithoutLabels, nodeWithLabels},
-			npe:                     nodePodEvictedCount{nodeWithoutLabels: 0, nodeWithLabels: 0},
-			maxPodsToEvict:          0,
+			maxPodsToEvictPerNode:   0,
 		},
 		{
-			description:             "Pod is scheduled on node without matching labels, another schedulable node available, maxPodsToEvict set to 1, should not be evicted",
+			description:             "Pod is scheduled on node without matching labels, another schedulable node available, maxPodsToEvictPerNode set to 1, should not be evicted",
 			expectedEvictedPodCount: 1,
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionStrategy,
 			pods:                    addPodsToNode(nodeWithoutLabels),
 			nodes:                   []*v1.Node{nodeWithoutLabels, nodeWithLabels},
-			npe:                     nodePodEvictedCount{nodeWithoutLabels: 0, nodeWithLabels: 0},
-			maxPodsToEvict:          1,
+			maxPodsToEvictPerNode:   1,
 		},
 		{
 			description:             "Pod is scheduled on node without matching labels, but no node where pod fits is available, should not evict",
@@ -160,8 +140,7 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 			strategy:                requiredDuringSchedulingIgnoredDuringExecutionStrategy,
 			pods:                    addPodsToNode(nodeWithoutLabels),
 			nodes:                   []*v1.Node{nodeWithoutLabels, unschedulableNodeWithLabels},
-			npe:                     nodePodEvictedCount{nodeWithoutLabels: 0, unschedulableNodeWithLabels: 0},
-			maxPodsToEvict:          0,
+			maxPodsToEvictPerNode:   0,
 		},
 	}
 
@@ -172,11 +151,17 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 			return true, &v1.PodList{Items: tc.pods}, nil
 		})
 
-		ds := options.DeschedulerServer{
-			Client: fakeClient,
-		}
+		podEvictor := evictions.NewPodEvictor(
+			fakeClient,
+			"v1",
+			false,
+			tc.maxPodsToEvictPerNode,
+			tc.nodes,
+			false,
+		)
 
-		actualEvictedPodCount := removePodsViolatingNodeAffinityCount(&ds, tc.strategy, "v1", tc.nodes, tc.npe, tc.maxPodsToEvict)
+		RemovePodsViolatingNodeAffinity(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
+		actualEvictedPodCount := podEvictor.TotalEvicted()
 		if actualEvictedPodCount != tc.expectedEvictedPodCount {
 			t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
 		}

pkg/descheduler/strategies/node_taint.go

@@ -0,0 +1,56 @@
+/*
+Copyright 2017 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"
+
+	"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"
+
+	v1 "k8s.io/api/core/v1"
+	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/klog/v2"
+)
+
+// 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) {
+	for _, node := range nodes {
+		klog.V(1).Infof("Processing node: %#v\n", node.Name)
+		pods, err := podutil.ListPodsOnANode(ctx, client, node, podEvictor.IsEvictable)
+		if err != nil {
+			//no pods evicted as error encountered retrieving evictable Pods
+			return
+		}
+		totalPods := len(pods)
+		for i := 0; i < totalPods; i++ {
+			if !utils.TolerationsTolerateTaintsWithFilter(
+				pods[i].Spec.Tolerations,
+				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)
+				if _, err := podEvictor.EvictPod(ctx, pods[i], node, "NodeTaint"); err != nil {
+					klog.Errorf("Error evicting pod: (%#v)", err)
+					break
+				}
+			}
+		}
+	}
+}

pkg/descheduler/strategies/node_taint_test.go

@@ -0,0 +1,285 @@
+package strategies
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes/fake"
+	core "k8s.io/client-go/testing"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	"sigs.k8s.io/descheduler/pkg/utils"
+	"sigs.k8s.io/descheduler/test"
+)
+
+func createNoScheduleTaint(key, value string, index int) v1.Taint {
+	return v1.Taint{
+		Key:    "testTaint" + fmt.Sprintf("%v", index),
+		Value:  "test" + fmt.Sprintf("%v", index),
+		Effect: v1.TaintEffectNoSchedule,
+	}
+}
+
+func addTaintsToNode(node *v1.Node, key, value string, indices []int) *v1.Node {
+	taints := []v1.Taint{}
+	for _, index := range indices {
+		taints = append(taints, createNoScheduleTaint(key, value, index))
+	}
+	node.Spec.Taints = taints
+	return node
+}
+
+func addTolerationToPod(pod *v1.Pod, key, value string, index int) *v1.Pod {
+	if pod.Annotations == nil {
+		pod.Annotations = map[string]string{}
+	}
+
+	pod.Spec.Tolerations = []v1.Toleration{{Key: key + fmt.Sprintf("%v", index), Value: value + fmt.Sprintf("%v", index), Effect: v1.TaintEffectNoSchedule}}
+
+	return pod
+}
+
+func TestDeletePodsViolatingNodeTaints(t *testing.T) {
+	ctx := context.Background()
+	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
+	node1 = addTaintsToNode(node1, "testTaint", "test", []int{1})
+	node2 := test.BuildTestNode("n2", 2000, 3000, 10, nil)
+	node1 = addTaintsToNode(node2, "testingTaint", "testing", []int{1})
+
+	p1 := test.BuildTestPod("p1", 100, 0, node1.Name, nil)
+	p2 := test.BuildTestPod("p2", 100, 0, node1.Name, nil)
+	p3 := test.BuildTestPod("p3", 100, 0, node1.Name, nil)
+	p4 := test.BuildTestPod("p4", 100, 0, node1.Name, nil)
+	p5 := test.BuildTestPod("p5", 100, 0, node1.Name, nil)
+	p6 := test.BuildTestPod("p6", 100, 0, node1.Name, nil)
+
+	p1.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+	p2.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+	p3.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+	p4.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+	p5.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+	p6.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+	p7 := test.BuildTestPod("p7", 100, 0, node2.Name, nil)
+	p8 := test.BuildTestPod("p8", 100, 0, node2.Name, nil)
+	p9 := test.BuildTestPod("p9", 100, 0, node2.Name, nil)
+	p10 := test.BuildTestPod("p10", 100, 0, node2.Name, nil)
+	p11 := test.BuildTestPod("p11", 100, 0, node2.Name, nil)
+	p11.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+
+	// The following 4 pods won't get evicted.
+	// A Critical Pod.
+	p7.Namespace = "kube-system"
+	priority := utils.SystemCriticalPriority
+	p7.Spec.Priority = &priority
+
+	// A daemonset.
+	p8.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
+	// A pod with local storage.
+	p9.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
+	p9.Spec.Volumes = []v1.Volume{
+		{
+			Name: "sample",
+			VolumeSource: v1.VolumeSource{
+				HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
+				EmptyDir: &v1.EmptyDirVolumeSource{
+					SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
+			},
+		},
+	}
+	// A Mirror Pod.
+	p10.Annotations = test.GetMirrorPodAnnotation()
+
+	p1 = addTolerationToPod(p1, "testTaint", "test", 1)
+	p3 = addTolerationToPod(p3, "testTaint", "test", 1)
+	p4 = addTolerationToPod(p4, "testTaintX", "testX", 1)
+
+	tests := []struct {
+		description             string
+		nodes                   []*v1.Node
+		pods                    []v1.Pod
+		evictLocalStoragePods   bool
+		maxPodsToEvictPerNode   int
+		expectedEvictedPodCount int
+	}{
+
+		{
+			description:             "Pods not tolerating node taint should be evicted",
+			pods:                    []v1.Pod{*p1, *p2, *p3},
+			nodes:                   []*v1.Node{node1},
+			evictLocalStoragePods:   false,
+			maxPodsToEvictPerNode:   0,
+			expectedEvictedPodCount: 1, //p2 gets evicted
+		},
+		{
+			description:             "Pods with tolerations but not tolerating node taint should be evicted",
+			pods:                    []v1.Pod{*p1, *p3, *p4},
+			nodes:                   []*v1.Node{node1},
+			evictLocalStoragePods:   false,
+			maxPodsToEvictPerNode:   0,
+			expectedEvictedPodCount: 1, //p4 gets evicted
+		},
+		{
+			description:             "Only <maxPodsToEvictPerNode> number of Pods not tolerating node taint should be evicted",
+			pods:                    []v1.Pod{*p1, *p5, *p6},
+			nodes:                   []*v1.Node{node1},
+			evictLocalStoragePods:   false,
+			maxPodsToEvictPerNode:   1,
+			expectedEvictedPodCount: 1, //p5 or p6 gets evicted
+		},
+		{
+			description:             "Critical pods not tolerating node taint should not be evicted",
+			pods:                    []v1.Pod{*p7, *p8, *p9, *p10},
+			nodes:                   []*v1.Node{node2},
+			evictLocalStoragePods:   false,
+			maxPodsToEvictPerNode:   0,
+			expectedEvictedPodCount: 0,
+		},
+		{
+			description:             "Critical pods except storage pods not tolerating node taint should not be evicted",
+			pods:                    []v1.Pod{*p7, *p8, *p9, *p10},
+			nodes:                   []*v1.Node{node2},
+			evictLocalStoragePods:   true,
+			maxPodsToEvictPerNode:   0,
+			expectedEvictedPodCount: 1,
+		},
+		{
+			description:             "Critical and non critical pods, only non critical pods not tolerating node taint should be evicted",
+			pods:                    []v1.Pod{*p7, *p8, *p10, *p11},
+			nodes:                   []*v1.Node{node2},
+			evictLocalStoragePods:   false,
+			maxPodsToEvictPerNode:   0,
+			expectedEvictedPodCount: 1,
+		},
+	}
+
+	for _, tc := range tests {
+
+		// create fake client
+		fakeClient := &fake.Clientset{}
+		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
+			return true, &v1.PodList{Items: tc.pods}, nil
+		})
+
+		podEvictor := evictions.NewPodEvictor(
+			fakeClient,
+			"v1",
+			false,
+			tc.maxPodsToEvictPerNode,
+			tc.nodes,
+			tc.evictLocalStoragePods,
+		)
+
+		RemovePodsViolatingNodeTaints(ctx, fakeClient, api.DeschedulerStrategy{}, tc.nodes, podEvictor)
+		actualEvictedPodCount := podEvictor.TotalEvicted()
+		if actualEvictedPodCount != tc.expectedEvictedPodCount {
+			t.Errorf("Test %#v failed, Unexpected no of pods evicted: pods evicted: %d, expected: %d", tc.description, actualEvictedPodCount, tc.expectedEvictedPodCount)
+		}
+	}
+
+}
+
+func TestToleratesTaint(t *testing.T) {
+
+	testCases := []struct {
+		description     string
+		toleration      v1.Toleration
+		taint           v1.Taint
+		expectTolerated bool
+	}{
+		{
+			description: "toleration and taint have the same key and effect, and operator is Exists, and taint has no value, expect tolerated",
+			toleration: v1.Toleration{
+				Key:      "foo",
+				Operator: v1.TolerationOpExists,
+				Effect:   v1.TaintEffectNoSchedule,
+			},
+			taint: v1.Taint{
+				Key:    "foo",
+				Effect: v1.TaintEffectNoSchedule,
+			},
+			expectTolerated: true,
+		},
+		{
+			description: "toleration and taint have the same key and effect, and operator is Exists, and taint has some value, expect tolerated",
+			toleration: v1.Toleration{
+				Key:      "foo",
+				Operator: v1.TolerationOpExists,
+				Effect:   v1.TaintEffectNoSchedule,
+			},
+			taint: v1.Taint{
+				Key:    "foo",
+				Value:  "bar",
+				Effect: v1.TaintEffectNoSchedule,
+			},
+			expectTolerated: true,
+		},
+		{
+			description: "toleration and taint have the same effect, toleration has empty key and operator is Exists, means match all taints, expect tolerated",
+			toleration: v1.Toleration{
+				Key:      "",
+				Operator: v1.TolerationOpExists,
+				Effect:   v1.TaintEffectNoSchedule,
+			},
+			taint: v1.Taint{
+				Key:    "foo",
+				Value:  "bar",
+				Effect: v1.TaintEffectNoSchedule,
+			},
+			expectTolerated: true,
+		},
+		{
+			description: "toleration and taint have the same key, effect and value, and operator is Equal, expect tolerated",
+			toleration: v1.Toleration{
+				Key:      "foo",
+				Operator: v1.TolerationOpEqual,
+				Value:    "bar",
+				Effect:   v1.TaintEffectNoSchedule,
+			},
+			taint: v1.Taint{
+				Key:    "foo",
+				Value:  "bar",
+				Effect: v1.TaintEffectNoSchedule,
+			},
+			expectTolerated: true,
+		},
+		{
+			description: "toleration and taint have the same key and effect, but different values, and operator is Equal, expect not tolerated",
+			toleration: v1.Toleration{
+				Key:      "foo",
+				Operator: v1.TolerationOpEqual,
+				Value:    "value1",
+				Effect:   v1.TaintEffectNoSchedule,
+			},
+			taint: v1.Taint{
+				Key:    "foo",
+				Value:  "value2",
+				Effect: v1.TaintEffectNoSchedule,
+			},
+			expectTolerated: false,
+		},
+		{
+			description: "toleration and taint have the same key and value, but different effects, and operator is Equal, expect not tolerated",
+			toleration: v1.Toleration{
+				Key:      "foo",
+				Operator: v1.TolerationOpEqual,
+				Value:    "bar",
+				Effect:   v1.TaintEffectNoSchedule,
+			},
+			taint: v1.Taint{
+				Key:    "foo",
+				Value:  "bar",
+				Effect: v1.TaintEffectNoExecute,
+			},
+			expectTolerated: false,
+		},
+	}
+	for _, tc := range testCases {
+		if tolerated := tc.toleration.ToleratesTaint(&tc.taint); tc.expectTolerated != tolerated {
+			t.Errorf("[%s] expect %v, got %v: toleration %+v, taint %s", tc.description, tc.expectTolerated, tolerated, tc.toleration, tc.taint.ToString())
+		}
+	}
+}

pkg/descheduler/strategies/pod_antiaffinity.go

@@ -17,48 +17,38 @@ limitations under the License.
 package strategies
 
 import (
-	"github.com/kubernetes-incubator/descheduler/cmd/descheduler/app/options"
-	"github.com/kubernetes-incubator/descheduler/pkg/api"
-	"github.com/kubernetes-incubator/descheduler/pkg/descheduler/evictions"
-	podutil "github.com/kubernetes-incubator/descheduler/pkg/descheduler/pod"
-
-	"github.com/golang/glog"
+	"context"
+	"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"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	clientset "k8s.io/client-go/kubernetes"
-	priorityutil "k8s.io/kubernetes/plugin/pkg/scheduler/algorithm/priorities/util"
+	"k8s.io/klog/v2"
 )
 
-// RemovePodsViolatingInterPodAntiAffinity with elimination strategy
-func RemovePodsViolatingInterPodAntiAffinity(ds *options.DeschedulerServer, strategy api.DeschedulerStrategy, policyGroupVersion string, nodes []*v1.Node, nodePodCount nodePodEvictedCount) {
-	if !strategy.Enabled {
-		return
-	}
-	removePodsWithAffinityRules(ds.Client, policyGroupVersion, nodes, ds.DryRun, nodePodCount, ds.MaxNoOfPodsToEvictPerNode)
-}
-
-// removePodsWithAffinityRules evicts pods on the node which are having a pod affinity rules.
-func removePodsWithAffinityRules(client clientset.Interface, policyGroupVersion string, nodes []*v1.Node, dryRun bool, nodePodCount nodePodEvictedCount, maxPodsToEvict int) int {
-	podsEvicted := 0
+// 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) {
 	for _, node := range nodes {
-		glog.V(1).Infof("Processing node: %#v\n", node.Name)
-		pods, err := podutil.ListEvictablePodsOnNode(client, node)
+		klog.V(1).Infof("Processing node: %#v\n", node.Name)
+		pods, err := podutil.ListPodsOnANode(ctx, client, node, podEvictor.IsEvictable)
 		if err != nil {
-			return 0
+			return
 		}
+		// sort the evictable Pods based on priority, if there are multiple pods with same priority, they are sorted based on QoS tiers.
+		podutil.SortPodsBasedOnPriorityLowToHigh(pods)
 		totalPods := len(pods)
 		for i := 0; i < totalPods; i++ {
-			if maxPodsToEvict > 0 && nodePodCount[node]+1 > maxPodsToEvict {
-				break
-			}
 			if checkPodsWithAntiAffinityExist(pods[i], pods) {
-				success, err := evictions.EvictPod(client, pods[i], policyGroupVersion, dryRun)
-				if !success {
-					glog.Infof("Error when evicting pod: %#v (%#v)\n", pods[i].Name, err)
-				} else {
-					nodePodCount[node]++
-					glog.V(1).Infof("Evicted pod: %#v (%#v)\n because of existing anti-affinity", pods[i].Name, err)
+				success, err := podEvictor.EvictPod(ctx, pods[i], node, "InterPodAntiAffinity")
+				if err != nil {
+					klog.Errorf("Error evicting pod: (%#v)", err)
+					break
+				}
+
+				if success {
 					// Since the current pod is evicted all other pods which have anti-affinity with this
 					// pod need not be evicted.
 					// Update pods.
@@ -68,9 +58,7 @@ func removePodsWithAffinityRules(client clientset.Interface, policyGroupVersion
 				}
 			}
 		}
-		podsEvicted += nodePodCount[node]
 	}
-	return podsEvicted
 }
 
 // checkPodsWithAntiAffinityExist checks if there are other pods on the node that the current pod cannot tolerate.
@@ -78,14 +66,14 @@ func checkPodsWithAntiAffinityExist(pod *v1.Pod, pods []*v1.Pod) bool {
 	affinity := pod.Spec.Affinity
 	if affinity != nil && affinity.PodAntiAffinity != nil {
 		for _, term := range getPodAntiAffinityTerms(affinity.PodAntiAffinity) {
-			namespaces := priorityutil.GetNamespacesFromPodAffinityTerm(pod, &term)
+			namespaces := utils.GetNamespacesFromPodAffinityTerm(pod, &term)
 			selector, err := metav1.LabelSelectorAsSelector(term.LabelSelector)
 			if err != nil {
-				glog.Infof("%v", err)
+				klog.Infof("%v", err)
 				return false
 			}
 			for _, existingPod := range pods {
-				if existingPod.Name != pod.Name && priorityutil.PodMatchesTermsNamespaceAndSelector(existingPod, namespaces, selector) {
+				if existingPod.Name != pod.Name && utils.PodMatchesTermsNamespaceAndSelector(existingPod, namespaces, selector) {
 					return true
 				}
 			}