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https://github.com/k3s-io/kubernetes.git
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Merge pull request #128022 from googs1025/cleanup/ut/preemption
chore(scheduler): add unit test for framework preemption part
This commit is contained in:
Kubernetes Prow Robot
GitHub
commit
d09d98e07c
@ -18,6 +18,8 @@ package preemption
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import (
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"context"
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"errors"
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"fmt"
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"sort"
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"testing"
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@ -28,6 +30,8 @@ import (
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/client-go/informers"
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clientsetfake "k8s.io/client-go/kubernetes/fake"
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"k8s.io/client-go/kubernetes/scheme"
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"k8s.io/client-go/tools/events"
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"k8s.io/klog/v2/ktesting"
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extenderv1 "k8s.io/kube-scheduler/extender/v1"
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internalcache "k8s.io/kubernetes/pkg/scheduler/backend/cache"
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@ -355,3 +359,479 @@ func TestSelectCandidate(t *testing.T) {
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})
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}
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}
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type fakeCandidate struct {
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victims *extenderv1.Victims
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name string
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}
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// Victims returns s.victims.
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func (s *fakeCandidate) Victims() *extenderv1.Victims {
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return s.victims
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}
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// Name returns s.name.
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func (s *fakeCandidate) Name() string {
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return s.name
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}
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func TestPrepareCandidate(t *testing.T) {
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var (
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node1Name = "node1"
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defaultSchedulerName = "default-scheduler"
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)
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condition := v1.PodCondition{
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Type: v1.DisruptionTarget,
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Status: v1.ConditionTrue,
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Reason: v1.PodReasonPreemptionByScheduler,
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Message: fmt.Sprintf("%s: preempting to accommodate a higher priority pod", defaultSchedulerName),
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}
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var (
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victim1 = st.MakePod().Name("victim1").UID("victim1").
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Node(node1Name).SchedulerName(defaultSchedulerName).Priority(midPriority).
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Containers([]v1.Container{st.MakeContainer().Name("container1").Obj()}).
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Obj()
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victim2 = st.MakePod().Name("victim2").UID("victim2").
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Node(node1Name).SchedulerName(defaultSchedulerName).Priority(50000).
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Containers([]v1.Container{st.MakeContainer().Name("container1").Obj()}).
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Obj()
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victim1WithMatchingCondition = st.MakePod().Name("victim1").UID("victim1").
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Node(node1Name).SchedulerName(defaultSchedulerName).Priority(midPriority).
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Conditions([]v1.PodCondition{condition}).
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Containers([]v1.Container{st.MakeContainer().Name("container1").Obj()}).
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Obj()
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preemptor = st.MakePod().Name("preemptor").UID("preemptor").
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SchedulerName(defaultSchedulerName).Priority(highPriority).
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Containers([]v1.Container{st.MakeContainer().Name("container1").Obj()}).
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Obj()
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)
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tests := []struct {
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name string
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nodeNames []string
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candidate *fakeCandidate
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preemptor *v1.Pod
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testPods []*v1.Pod
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expectedStatus *framework.Status
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}{
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{
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name: "no victims",
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candidate: &fakeCandidate{
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victims: &extenderv1.Victims{},
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},
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preemptor: preemptor,
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testPods: []*v1.Pod{
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victim1,
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},
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nodeNames: []string{node1Name},
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expectedStatus: nil,
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},
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{
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name: "one victim without condition",
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candidate: &fakeCandidate{
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name: node1Name,
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victims: &extenderv1.Victims{
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Pods: []*v1.Pod{
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victim1,
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},
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},
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},
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preemptor: preemptor,
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testPods: []*v1.Pod{
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victim1,
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},
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nodeNames: []string{node1Name},
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expectedStatus: nil,
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},
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{
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name: "one victim with same condition",
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candidate: &fakeCandidate{
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name: node1Name,
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victims: &extenderv1.Victims{
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Pods: []*v1.Pod{
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victim1WithMatchingCondition,
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},
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},
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},
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preemptor: preemptor,
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testPods: []*v1.Pod{
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victim1WithMatchingCondition,
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},
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nodeNames: []string{node1Name},
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expectedStatus: nil,
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},
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{
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name: "one victim, but patch pod failed (not found victim1 pod)",
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candidate: &fakeCandidate{
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name: node1Name,
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victims: &extenderv1.Victims{
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Pods: []*v1.Pod{
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victim1WithMatchingCondition,
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},
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},
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},
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preemptor: preemptor,
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testPods: []*v1.Pod{},
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nodeNames: []string{node1Name},
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expectedStatus: framework.AsStatus(errors.New("patch pod status failed")),
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},
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{
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name: "one victim, but delete pod failed (not found victim1 pod)",
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candidate: &fakeCandidate{
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name: node1Name,
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victims: &extenderv1.Victims{
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Pods: []*v1.Pod{
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victim1,
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},
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},
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},
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preemptor: preemptor,
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testPods: []*v1.Pod{},
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nodeNames: []string{node1Name},
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expectedStatus: framework.AsStatus(errors.New("delete pod failed")),
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},
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{
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name: "two victims without condition, one passes successfully and the second fails (not found victim2 pod)",
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candidate: &fakeCandidate{
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name: node1Name,
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victims: &extenderv1.Victims{
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Pods: []*v1.Pod{
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victim1,
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victim2,
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},
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},
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},
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preemptor: preemptor,
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testPods: []*v1.Pod{
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victim1,
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},
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nodeNames: []string{node1Name},
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expectedStatus: framework.AsStatus(errors.New("patch pod status failed")),
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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metrics.Register()
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logger, ctx := ktesting.NewTestContext(t)
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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nodes := make([]*v1.Node, len(tt.nodeNames))
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for i, nodeName := range tt.nodeNames {
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nodes[i] = st.MakeNode().Name(nodeName).Capacity(veryLargeRes).Obj()
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}
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registeredPlugins := append([]tf.RegisterPluginFunc{
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tf.RegisterQueueSortPlugin(queuesort.Name, queuesort.New)},
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tf.RegisterBindPlugin(defaultbinder.Name, defaultbinder.New),
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)
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var objs []runtime.Object
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for _, pod := range tt.testPods {
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objs = append(objs, pod)
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}
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cs := clientsetfake.NewClientset(objs...)
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informerFactory := informers.NewSharedInformerFactory(cs, 0)
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eventBroadcaster := events.NewBroadcaster(&events.EventSinkImpl{Interface: cs.EventsV1()})
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fwk, err := tf.NewFramework(
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ctx,
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registeredPlugins, "",
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frameworkruntime.WithClientSet(cs),
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frameworkruntime.WithLogger(logger),
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frameworkruntime.WithInformerFactory(informerFactory),
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frameworkruntime.WithWaitingPods(frameworkruntime.NewWaitingPodsMap()),
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frameworkruntime.WithSnapshotSharedLister(internalcache.NewSnapshot(tt.testPods, nodes)),
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frameworkruntime.WithPodNominator(internalqueue.NewSchedulingQueue(nil, informerFactory)),
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frameworkruntime.WithEventRecorder(eventBroadcaster.NewRecorder(scheme.Scheme, "test-scheduler")),
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)
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if err != nil {
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t.Fatal(err)
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}
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informerFactory.Start(ctx.Done())
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informerFactory.WaitForCacheSync(ctx.Done())
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fakePreemptionScorePostFilterPlugin := &FakePreemptionScorePostFilterPlugin{}
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pe := Evaluator{
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PluginName: "FakePreemptionScorePostFilter",
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Handler: fwk,
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Interface: fakePreemptionScorePostFilterPlugin,
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State: framework.NewCycleState(),
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}
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status := pe.prepareCandidate(ctx, tt.candidate, tt.preemptor, "test-plugin")
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if tt.expectedStatus == nil {
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if status != nil {
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t.Errorf("expect nil status, but got %v", status)
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}
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} else {
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if status == nil {
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t.Errorf("expect status %v, but got nil", tt.expectedStatus)
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} else if status.Code() != tt.expectedStatus.Code() {
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t.Errorf("expect status code %v, but got %v", tt.expectedStatus.Code(), status.Code())
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}
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}
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})
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}
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}
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type fakeExtender struct {
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ignorable bool
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errProcessPreemption bool
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supportsPreemption bool
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returnsNoVictims bool
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}
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func newFakeExtender() *fakeExtender {
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return &fakeExtender{}
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}
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func (f *fakeExtender) WithIgnorable(ignorable bool) *fakeExtender {
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f.ignorable = ignorable
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return f
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}
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func (f *fakeExtender) WithErrProcessPreemption(errProcessPreemption bool) *fakeExtender {
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f.errProcessPreemption = errProcessPreemption
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return f
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}
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func (f *fakeExtender) WithSupportsPreemption(supportsPreemption bool) *fakeExtender {
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f.supportsPreemption = supportsPreemption
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return f
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}
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func (f *fakeExtender) WithReturnNoVictims(returnsNoVictims bool) *fakeExtender {
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f.returnsNoVictims = returnsNoVictims
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return f
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}
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func (f *fakeExtender) Name() string {
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return "fakeExtender"
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}
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func (f *fakeExtender) IsIgnorable() bool {
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return f.ignorable
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}
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func (f *fakeExtender) ProcessPreemption(
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_ *v1.Pod,
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victims map[string]*extenderv1.Victims,
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_ framework.NodeInfoLister,
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) (map[string]*extenderv1.Victims, error) {
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if f.supportsPreemption {
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if f.errProcessPreemption {
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return nil, errors.New("extender preempt error")
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}
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if f.returnsNoVictims {
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return map[string]*extenderv1.Victims{"mock": {}}, nil
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}
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return victims, nil
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}
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return nil, nil
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}
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func (f *fakeExtender) SupportsPreemption() bool {
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return f.supportsPreemption
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}
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func (f *fakeExtender) IsInterested(pod *v1.Pod) bool {
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return pod != nil
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}
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func (f *fakeExtender) Filter(_ *v1.Pod, _ []*framework.NodeInfo) ([]*framework.NodeInfo, extenderv1.FailedNodesMap, extenderv1.FailedNodesMap, error) {
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return nil, nil, nil, nil
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}
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func (f *fakeExtender) Prioritize(
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_ *v1.Pod,
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_ []*framework.NodeInfo,
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) (hostPriorities *extenderv1.HostPriorityList, weight int64, err error) {
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return nil, 0, nil
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}
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func (f *fakeExtender) Bind(_ *v1.Binding) error {
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return nil
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}
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func (f *fakeExtender) IsBinder() bool {
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return true
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}
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func (f *fakeExtender) IsPrioritizer() bool {
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return true
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}
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func (f *fakeExtender) IsFilter() bool {
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return true
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}
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func TestCallExtenders(t *testing.T) {
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var (
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node1Name = "node1"
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defaultSchedulerName = "default-scheduler"
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preemptor = st.MakePod().Name("preemptor").UID("preemptor").
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SchedulerName(defaultSchedulerName).Priority(highPriority).
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Containers([]v1.Container{st.MakeContainer().Name("container1").Obj()}).
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Obj()
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victim = st.MakePod().Name("victim").UID("victim").
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Node(node1Name).SchedulerName(defaultSchedulerName).Priority(midPriority).
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Containers([]v1.Container{st.MakeContainer().Name("container1").Obj()}).
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Obj()
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makeCandidates = func(nodeName string, pods ...*v1.Pod) []Candidate {
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return []Candidate{
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&fakeCandidate{
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name: nodeName,
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victims: &extenderv1.Victims{
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Pods: pods,
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},
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},
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}
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}
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)
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tests := []struct {
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name string
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extenders []framework.Extender
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candidates []Candidate
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wantStatus *framework.Status
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wantCandidates []Candidate
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}{
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{
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name: "no extenders",
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extenders: []framework.Extender{},
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candidates: makeCandidates(node1Name, victim),
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wantStatus: nil,
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wantCandidates: makeCandidates(node1Name, victim),
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},
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{
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name: "one extender supports preemption",
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extenders: []framework.Extender{
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newFakeExtender().WithSupportsPreemption(true),
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},
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candidates: makeCandidates(node1Name, victim),
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wantStatus: nil,
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wantCandidates: makeCandidates(node1Name, victim),
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},
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{
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name: "one extender with return no victims",
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extenders: []framework.Extender{
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newFakeExtender().WithSupportsPreemption(true).WithReturnNoVictims(true),
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},
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candidates: makeCandidates(node1Name, victim),
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wantStatus: framework.AsStatus(fmt.Errorf("expected at least one victim pod on node %q", node1Name)),
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wantCandidates: []Candidate{},
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},
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{
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name: "one extender does not support preemption",
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extenders: []framework.Extender{
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newFakeExtender().WithSupportsPreemption(false),
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},
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candidates: makeCandidates(node1Name, victim),
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wantStatus: nil,
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wantCandidates: makeCandidates(node1Name, victim),
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},
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{
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name: "one extender with no return victims and is ignorable",
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extenders: []framework.Extender{
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newFakeExtender().WithSupportsPreemption(true).
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WithReturnNoVictims(true).WithIgnorable(true),
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},
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candidates: makeCandidates(node1Name, victim),
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wantStatus: nil,
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wantCandidates: []Candidate{},
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},
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{
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name: "one extender returns error and is ignorable",
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extenders: []framework.Extender{
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newFakeExtender().WithIgnorable(true).
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WithSupportsPreemption(true).WithErrProcessPreemption(true),
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},
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candidates: makeCandidates(node1Name, victim),
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wantStatus: nil,
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wantCandidates: makeCandidates(node1Name, victim),
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},
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{
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name: "one extender returns error and is not ignorable",
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extenders: []framework.Extender{
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newFakeExtender().WithErrProcessPreemption(true).
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WithSupportsPreemption(true),
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},
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candidates: makeCandidates(node1Name, victim),
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wantStatus: framework.AsStatus(fmt.Errorf("extender preempt error")),
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wantCandidates: nil,
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},
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{
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name: "one extender with empty victims input",
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extenders: []framework.Extender{
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newFakeExtender().WithSupportsPreemption(true),
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},
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candidates: []Candidate{},
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wantStatus: nil,
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wantCandidates: []Candidate{},
|
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},
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}
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|
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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metrics.Register()
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logger, ctx := ktesting.NewTestContext(t)
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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nodes := make([]*v1.Node, len([]string{node1Name}))
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for i, nodeName := range []string{node1Name} {
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nodes[i] = st.MakeNode().Name(nodeName).Capacity(veryLargeRes).Obj()
|
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}
|
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registeredPlugins := append([]tf.RegisterPluginFunc{
|
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tf.RegisterQueueSortPlugin(queuesort.Name, queuesort.New)},
|
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tf.RegisterBindPlugin(defaultbinder.Name, defaultbinder.New),
|
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)
|
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var objs []runtime.Object
|
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objs = append(objs, preemptor)
|
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cs := clientsetfake.NewClientset(objs...)
|
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informerFactory := informers.NewSharedInformerFactory(cs, 0)
|
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fwk, err := tf.NewFramework(
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ctx,
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registeredPlugins, "",
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frameworkruntime.WithClientSet(cs),
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frameworkruntime.WithLogger(logger),
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frameworkruntime.WithExtenders(tt.extenders),
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frameworkruntime.WithInformerFactory(informerFactory),
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frameworkruntime.WithSnapshotSharedLister(internalcache.NewSnapshot([]*v1.Pod{preemptor}, nodes)),
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frameworkruntime.WithPodNominator(internalqueue.NewSchedulingQueue(nil, informerFactory)),
|
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)
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if err != nil {
|
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t.Fatal(err)
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}
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informerFactory.Start(ctx.Done())
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informerFactory.WaitForCacheSync(ctx.Done())
|
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|
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fakePreemptionScorePostFilterPlugin := &FakePreemptionScorePostFilterPlugin{}
|
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pe := Evaluator{
|
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PluginName: "FakePreemptionScorePostFilter",
|
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Handler: fwk,
|
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Interface: fakePreemptionScorePostFilterPlugin,
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State: framework.NewCycleState(),
|
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}
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gotCandidates, status := pe.callExtenders(logger, preemptor, tt.candidates)
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if (tt.wantStatus == nil) != (status == nil) || status.Code() != tt.wantStatus.Code() {
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t.Errorf("callExtenders() status mismatch. got: %v, want: %v", status, tt.wantStatus)
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}
|
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|
||||
if len(gotCandidates) != len(tt.wantCandidates) {
|
||||
t.Errorf("callExtenders() returned unexpected number of results. got: %d, want: %d", len(gotCandidates), len(tt.wantCandidates))
|
||||
} else {
|
||||
for i, gotCandidate := range gotCandidates {
|
||||
wantCandidate := tt.wantCandidates[i]
|
||||
if gotCandidate.Name() != wantCandidate.Name() {
|
||||
t.Errorf("callExtenders() node name mismatch. got: %s, want: %s", gotCandidate.Name(), wantCandidate.Name())
|
||||
}
|
||||
if len(gotCandidate.Victims().Pods) != len(wantCandidate.Victims().Pods) {
|
||||
t.Errorf("callExtenders() number of victim pods mismatch for node %s. got: %d, want: %d", gotCandidate.Name(), len(gotCandidate.Victims().Pods), len(wantCandidate.Victims().Pods))
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user