mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 13:29:11 +01:00
484 lines
18 KiB
Go
484 lines
18 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package evictions
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import (
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"context"
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"testing"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/client-go/kubernetes/fake"
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core "k8s.io/client-go/testing"
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podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
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"sigs.k8s.io/descheduler/pkg/utils"
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"sigs.k8s.io/descheduler/test"
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)
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func TestEvictPod(t *testing.T) {
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ctx := context.Background()
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node1 := test.BuildTestNode("node1", 1000, 2000, 9, nil)
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pod1 := test.BuildTestPod("p1", 400, 0, "node1", nil)
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tests := []struct {
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description string
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node *v1.Node
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pod *v1.Pod
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pods []v1.Pod
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want error
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}{
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{
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description: "test pod eviction - pod present",
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node: node1,
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pod: pod1,
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pods: []v1.Pod{*pod1},
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want: nil,
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},
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{
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description: "test pod eviction - pod absent",
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node: node1,
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pod: pod1,
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pods: []v1.Pod{*test.BuildTestPod("p2", 400, 0, "node1", nil), *test.BuildTestPod("p3", 450, 0, "node1", nil)},
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want: nil,
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},
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}
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for _, test := range tests {
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fakeClient := &fake.Clientset{}
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fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
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return true, &v1.PodList{Items: test.pods}, nil
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})
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got := evictPod(ctx, fakeClient, test.pod, "v1", false)
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if got != test.want {
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t.Errorf("Test error for Desc: %s. Expected %v pod eviction to be %v, got %v", test.description, test.pod.Name, test.want, got)
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}
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}
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}
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func TestIsEvictable(t *testing.T) {
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n1 := test.BuildTestNode("node1", 1000, 2000, 13, nil)
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lowPriority := int32(800)
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highPriority := int32(900)
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nodeTaintKey := "hardware"
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nodeTaintValue := "gpu"
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nodeLabelKey := "datacenter"
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nodeLabelValue := "east"
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type testCase struct {
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pod *v1.Pod
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nodes []*v1.Node
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runBefore func(*v1.Pod, []*v1.Node)
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evictLocalStoragePods bool
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evictSystemCriticalPods bool
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priorityThreshold *int32
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nodeFit bool
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result bool
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}
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testCases := []testCase{
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{ // Normal pod eviction with normal ownerRefs
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pod: test.BuildTestPod("p1", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Normal pod eviction with normal ownerRefs and descheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p2", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Normal pod eviction with replicaSet ownerRefs
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pod: test.BuildTestPod("p3", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Normal pod eviction with replicaSet ownerRefs and descheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p4", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
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pod.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Normal pod eviction with statefulSet ownerRefs
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pod: test.BuildTestPod("p18", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetStatefulSetOwnerRefList()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Normal pod eviction with statefulSet ownerRefs and descheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p19", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
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pod.ObjectMeta.OwnerReferences = test.GetStatefulSetOwnerRefList()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Pod not evicted because it is bound to a PV and evictLocalStoragePods = false
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pod: test.BuildTestPod("p5", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Spec.Volumes = []v1.Volume{
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{
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Name: "sample",
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VolumeSource: v1.VolumeSource{
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HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
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EmptyDir: &v1.EmptyDirVolumeSource{
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SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
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},
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},
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}
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: false,
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}, { // Pod is evicted because it is bound to a PV and evictLocalStoragePods = true
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pod: test.BuildTestPod("p6", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Spec.Volumes = []v1.Volume{
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{
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Name: "sample",
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VolumeSource: v1.VolumeSource{
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HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
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EmptyDir: &v1.EmptyDirVolumeSource{
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SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
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},
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},
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}
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},
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evictLocalStoragePods: true,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Pod is evicted because it is bound to a PV and evictLocalStoragePods = false, but it has scheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p7", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Spec.Volumes = []v1.Volume{
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{
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Name: "sample",
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VolumeSource: v1.VolumeSource{
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HostPath: &v1.HostPathVolumeSource{Path: "somePath"},
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EmptyDir: &v1.EmptyDirVolumeSource{
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SizeLimit: resource.NewQuantity(int64(10), resource.BinarySI)},
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},
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},
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}
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Pod not evicted becasuse it is part of a daemonSet
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pod: test.BuildTestPod("p8", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: false,
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}, { // Pod is evicted becasuse it is part of a daemonSet, but it has scheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p9", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
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pod.ObjectMeta.OwnerReferences = test.GetDaemonSetOwnerRefList()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Pod not evicted becasuse it is a mirror pod
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pod: test.BuildTestPod("p10", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Annotations = test.GetMirrorPodAnnotation()
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: false,
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}, { // Pod is evicted becasuse it is a mirror pod, but it has scheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p11", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Annotations = test.GetMirrorPodAnnotation()
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pod.Annotations["descheduler.alpha.kubernetes.io/evict"] = "true"
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Pod not evicted becasuse it has system critical priority
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pod: test.BuildTestPod("p12", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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priority := utils.SystemCriticalPriority
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pod.Spec.Priority = &priority
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: false,
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}, { // Pod is evicted becasuse it has system critical priority, but it has scheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p13", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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priority := utils.SystemCriticalPriority
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pod.Spec.Priority = &priority
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pod.Annotations = map[string]string{
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"descheduler.alpha.kubernetes.io/evict": "true",
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}
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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result: true,
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}, { // Pod not evicted becasuse it has a priority higher than the configured priority threshold
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pod: test.BuildTestPod("p14", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Spec.Priority = &highPriority
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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priorityThreshold: &lowPriority,
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result: false,
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}, { // Pod is evicted becasuse it has a priority higher than the configured priority threshold, but it has scheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p15", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
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pod.Spec.Priority = &highPriority
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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priorityThreshold: &lowPriority,
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result: true,
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}, { // Pod is evicted becasuse it has system critical priority, but evictSystemCriticalPods = true
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pod: test.BuildTestPod("p16", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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priority := utils.SystemCriticalPriority
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pod.Spec.Priority = &priority
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: true,
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result: true,
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}, { // Pod is evicted becasuse it has system critical priority, but evictSystemCriticalPods = true and it has scheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p16", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
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priority := utils.SystemCriticalPriority
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pod.Spec.Priority = &priority
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: true,
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result: true,
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}, { // Pod is evicted becasuse it has a priority higher than the configured priority threshold, but evictSystemCriticalPods = true
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pod: test.BuildTestPod("p17", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Spec.Priority = &highPriority
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: true,
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priorityThreshold: &lowPriority,
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result: true,
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}, { // Pod is evicted becasuse it has a priority higher than the configured priority threshold, but evictSystemCriticalPods = true and it has scheduler.alpha.kubernetes.io/evict annotation
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pod: test.BuildTestPod("p17", 400, 0, n1.Name, nil),
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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pod.Annotations = map[string]string{"descheduler.alpha.kubernetes.io/evict": "true"}
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pod.Spec.Priority = &highPriority
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: true,
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priorityThreshold: &lowPriority,
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result: true,
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}, { // Pod with no tolerations running on normal node, all other nodes tainted
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pod: test.BuildTestPod("p1", 400, 0, n1.Name, nil),
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nodes: []*v1.Node{test.BuildTestNode("node2", 1000, 2000, 13, nil), test.BuildTestNode("node3", 1000, 2000, 13, nil)},
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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for _, node := range nodes {
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node.Spec.Taints = []v1.Taint{
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{
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Key: nodeTaintKey,
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Value: nodeTaintValue,
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Effect: v1.TaintEffectNoSchedule,
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},
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}
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}
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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nodeFit: true,
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result: false,
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}, { // Pod with correct tolerations running on normal node, all other nodes tainted
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pod: test.BuildTestPod("p1", 400, 0, n1.Name, func(pod *v1.Pod) {
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pod.Spec.Tolerations = []v1.Toleration{
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{
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Key: nodeTaintKey,
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Value: nodeTaintValue,
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Effect: v1.TaintEffectNoSchedule,
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},
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}
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}),
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nodes: []*v1.Node{test.BuildTestNode("node2", 1000, 2000, 13, nil), test.BuildTestNode("node3", 1000, 2000, 13, nil)},
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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for _, node := range nodes {
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node.Spec.Taints = []v1.Taint{
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{
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Key: nodeTaintKey,
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Value: nodeTaintValue,
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Effect: v1.TaintEffectNoSchedule,
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},
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}
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}
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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nodeFit: true,
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result: true,
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}, { // Pod with incorrect node selector
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pod: test.BuildTestPod("p1", 400, 0, n1.Name, func(pod *v1.Pod) {
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pod.Spec.NodeSelector = map[string]string{
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nodeLabelKey: "fail",
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}
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}),
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nodes: []*v1.Node{test.BuildTestNode("node2", 1000, 2000, 13, nil), test.BuildTestNode("node3", 1000, 2000, 13, nil)},
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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for _, node := range nodes {
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node.ObjectMeta.Labels = map[string]string{
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nodeLabelKey: nodeLabelValue,
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}
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}
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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nodeFit: true,
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result: false,
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}, { // Pod with correct node selector
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pod: test.BuildTestPod("p1", 400, 0, n1.Name, func(pod *v1.Pod) {
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pod.Spec.NodeSelector = map[string]string{
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nodeLabelKey: nodeLabelValue,
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}
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}),
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nodes: []*v1.Node{test.BuildTestNode("node2", 1000, 2000, 13, nil), test.BuildTestNode("node3", 1000, 2000, 13, nil)},
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runBefore: func(pod *v1.Pod, nodes []*v1.Node) {
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pod.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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for _, node := range nodes {
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node.ObjectMeta.Labels = map[string]string{
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nodeLabelKey: nodeLabelValue,
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}
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}
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},
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evictLocalStoragePods: false,
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evictSystemCriticalPods: false,
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nodeFit: true,
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result: true,
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},
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}
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for _, test := range testCases {
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test.runBefore(test.pod, test.nodes)
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nodes := append(test.nodes, n1)
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podEvictor := &PodEvictor{
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evictLocalStoragePods: test.evictLocalStoragePods,
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evictSystemCriticalPods: test.evictSystemCriticalPods,
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nodes: nodes,
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}
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evictable := podEvictor.Evictable()
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var opts []func(opts *Options)
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if test.priorityThreshold != nil {
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opts = append(opts, WithPriorityThreshold(*test.priorityThreshold))
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}
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if test.nodeFit {
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opts = append(opts, WithNodeFit(true))
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}
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evictable = podEvictor.Evictable(opts...)
|
|
|
|
result := evictable.IsEvictable(test.pod)
|
|
if result != test.result {
|
|
t.Errorf("IsEvictable should return for pod %s %t, but it returns %t", test.pod.Name, test.result, result)
|
|
}
|
|
|
|
}
|
|
}
|
|
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)
|
|
|
|
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()
|
|
if !utils.IsMirrorPod(p4) {
|
|
t.Errorf("Expected p4 to be a mirror pod.")
|
|
}
|
|
if !utils.IsPodWithLocalStorage(p3) {
|
|
t.Errorf("Expected p3 to be a pod with local storage.")
|
|
}
|
|
ownerRefList := podutil.OwnerRef(p2)
|
|
if !utils.IsDaemonsetPod(ownerRefList) {
|
|
t.Errorf("Expected p2 to be a daemonset pod.")
|
|
}
|
|
ownerRefList = podutil.OwnerRef(p1)
|
|
if utils.IsDaemonsetPod(ownerRefList) || utils.IsPodWithLocalStorage(p1) || utils.IsCriticalPriorityPod(p1) || utils.IsMirrorPod(p1) || utils.IsStaticPod(p1) {
|
|
t.Errorf("Expected p1 to be a normal pod.")
|
|
}
|
|
|
|
}
|