mirror of
https://github.com/kubernetes-sigs/descheduler.git
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f5e4acdd8a
This is a minor refactor of PodEvictor to include evictLocalStoragePods as a property (so that it doesn't need to be passed to each strategy function.) It also removes ListEvictablePodsOnNode and extends ListPodsOnANode with an optional "filter" function parameter, so that for example IsEvictable can be passed to it and achieve the same results as the function formerly known as ListEvictablePodsOnNode. This approach also now allows strategies to more explicitly extend their criteria of what IsEvictable considers an evictable pod (such as NodeAffinity, which checks that the pod can fit on any other node).
118 lines
3.5 KiB
Go
118 lines
3.5 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 strategies
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import (
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"context"
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"testing"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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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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"sigs.k8s.io/descheduler/pkg/api"
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"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
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"sigs.k8s.io/descheduler/test"
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)
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func TestPodAntiAffinity(t *testing.T) {
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ctx := context.Background()
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node := test.BuildTestNode("n1", 2000, 3000, 10, nil)
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p1 := test.BuildTestPod("p1", 100, 0, node.Name, nil)
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p2 := test.BuildTestPod("p2", 100, 0, node.Name, nil)
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p3 := test.BuildTestPod("p3", 100, 0, node.Name, nil)
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p4 := test.BuildTestPod("p4", 100, 0, node.Name, nil)
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p2.Labels = map[string]string{"foo": "bar"}
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p1.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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p2.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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p3.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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p4.ObjectMeta.OwnerReferences = test.GetNormalPodOwnerRefList()
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// set pod anti affinity
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setPodAntiAffinity(p1)
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setPodAntiAffinity(p3)
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setPodAntiAffinity(p4)
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tests := []struct {
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description string
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maxPodsToEvict int
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pods []v1.Pod
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expectedEvictedPodCount int
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}{
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{
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description: "Maximum pods to evict - 0",
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maxPodsToEvict: 0,
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pods: []v1.Pod{*p1, *p2, *p3, *p4},
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expectedEvictedPodCount: 3,
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},
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{
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description: "Maximum pods to evict - 3",
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maxPodsToEvict: 3,
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pods: []v1.Pod{*p1, *p2, *p3, *p4},
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expectedEvictedPodCount: 3,
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},
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}
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for _, test := range tests {
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// create fake client
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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: []v1.Pod{*p1, *p2, *p3, *p4}}, nil
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})
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fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
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return true, node, nil
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})
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podEvictor := evictions.NewPodEvictor(
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fakeClient,
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"v1",
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false,
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test.maxPodsToEvict,
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[]*v1.Node{node},
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false,
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)
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RemovePodsViolatingInterPodAntiAffinity(ctx, fakeClient, api.DeschedulerStrategy{}, []*v1.Node{node}, podEvictor)
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podsEvicted := podEvictor.TotalEvicted()
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if podsEvicted != test.expectedEvictedPodCount {
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t.Errorf("Unexpected no of pods evicted: pods evicted: %d, expected: %d", podsEvicted, test.expectedEvictedPodCount)
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}
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}
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}
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func setPodAntiAffinity(inputPod *v1.Pod) {
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inputPod.Spec.Affinity = &v1.Affinity{
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PodAntiAffinity: &v1.PodAntiAffinity{
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RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
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{
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LabelSelector: &metav1.LabelSelector{
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MatchExpressions: []metav1.LabelSelectorRequirement{
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{
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Key: "foo",
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Operator: metav1.LabelSelectorOpIn,
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Values: []string{"bar"},
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},
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},
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},
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TopologyKey: "region",
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},
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},
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},
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}
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}
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