mirror of
https://github.com/k3s-io/kubernetes.git
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373 lines
12 KiB
Go
373 lines
12 KiB
Go
/*
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Copyright 2014 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 scheduler
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import (
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"context"
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"errors"
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"fmt"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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v1 "k8s.io/api/core/v1"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/client-go/informers"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/kubernetes/fake"
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"k8s.io/client-go/tools/cache"
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"k8s.io/client-go/tools/events"
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extenderv1 "k8s.io/kube-scheduler/extender/v1"
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schedulerapi "k8s.io/kubernetes/pkg/scheduler/apis/config"
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"k8s.io/kubernetes/pkg/scheduler/framework"
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frameworkplugins "k8s.io/kubernetes/pkg/scheduler/framework/plugins"
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frameworkruntime "k8s.io/kubernetes/pkg/scheduler/framework/runtime"
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internalcache "k8s.io/kubernetes/pkg/scheduler/internal/cache"
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internalqueue "k8s.io/kubernetes/pkg/scheduler/internal/queue"
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"k8s.io/kubernetes/pkg/scheduler/profile"
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testingclock "k8s.io/utils/clock/testing"
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)
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const (
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podInitialBackoffDurationSeconds = 1
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podMaxBackoffDurationSeconds = 10
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testSchedulerName = "test-scheduler"
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)
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func TestCreate(t *testing.T) {
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client := fake.NewSimpleClientset()
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stopCh := make(chan struct{})
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defer close(stopCh)
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factory := newConfigFactory(client, stopCh)
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if _, err := factory.create(); err != nil {
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t.Error(err)
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}
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}
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func TestDefaultErrorFunc(t *testing.T) {
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testPod := &v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "test-pod", Namespace: "default"}}
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testPodUpdated := testPod.DeepCopy()
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testPodUpdated.Labels = map[string]string{"foo": ""}
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tests := []struct {
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name string
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injectErr error
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podUpdatedDuringScheduling bool // pod is updated during a scheduling cycle
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podDeletedDuringScheduling bool // pod is deleted during a scheduling cycle
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expect *v1.Pod
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}{
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{
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name: "pod is updated during a scheduling cycle",
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injectErr: nil,
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podUpdatedDuringScheduling: true,
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expect: testPodUpdated,
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},
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{
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name: "pod is not updated during a scheduling cycle",
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injectErr: nil,
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expect: testPod,
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},
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{
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name: "pod is deleted during a scheduling cycle",
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injectErr: nil,
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podDeletedDuringScheduling: true,
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expect: nil,
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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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stopCh := make(chan struct{})
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defer close(stopCh)
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client := fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testPod}})
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informerFactory := informers.NewSharedInformerFactory(client, 0)
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podInformer := informerFactory.Core().V1().Pods()
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// Need to add/update/delete testPod to the store.
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podInformer.Informer().GetStore().Add(testPod)
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queue := internalqueue.NewPriorityQueue(nil, informerFactory, internalqueue.WithClock(testingclock.NewFakeClock(time.Now())))
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schedulerCache := internalcache.New(30*time.Second, stopCh)
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queue.Add(testPod)
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queue.Pop()
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if tt.podUpdatedDuringScheduling {
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podInformer.Informer().GetStore().Update(testPodUpdated)
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queue.Update(testPod, testPodUpdated)
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}
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if tt.podDeletedDuringScheduling {
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podInformer.Informer().GetStore().Delete(testPod)
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queue.Delete(testPod)
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}
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testPodInfo := &framework.QueuedPodInfo{PodInfo: framework.NewPodInfo(testPod)}
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errFunc := MakeDefaultErrorFunc(client, podInformer.Lister(), queue, schedulerCache)
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errFunc(testPodInfo, tt.injectErr)
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var got *v1.Pod
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if tt.podUpdatedDuringScheduling {
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head, e := queue.Pop()
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if e != nil {
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t.Fatalf("Cannot pop pod from the activeQ: %v", e)
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}
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got = head.Pod
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} else {
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got = getPodFromPriorityQueue(queue, testPod)
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}
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if diff := cmp.Diff(tt.expect, got); diff != "" {
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t.Errorf("Unexpected pod (-want, +got): %s", diff)
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}
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})
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}
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}
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func TestDefaultErrorFunc_NodeNotFound(t *testing.T) {
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nodeFoo := &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "foo"}}
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nodeBar := &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "bar"}}
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testPod := &v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "test-pod", Namespace: "default"}}
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tests := []struct {
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name string
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nodes []v1.Node
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nodeNameToDelete string
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injectErr error
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expectNodeNames sets.String
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}{
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{
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name: "node is deleted during a scheduling cycle",
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nodes: []v1.Node{*nodeFoo, *nodeBar},
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nodeNameToDelete: "foo",
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injectErr: apierrors.NewNotFound(v1.Resource("node"), nodeFoo.Name),
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expectNodeNames: sets.NewString("bar"),
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},
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{
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name: "node is not deleted but NodeNotFound is received incorrectly",
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nodes: []v1.Node{*nodeFoo, *nodeBar},
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injectErr: apierrors.NewNotFound(v1.Resource("node"), nodeFoo.Name),
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expectNodeNames: sets.NewString("foo", "bar"),
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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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stopCh := make(chan struct{})
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defer close(stopCh)
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client := fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testPod}}, &v1.NodeList{Items: tt.nodes})
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informerFactory := informers.NewSharedInformerFactory(client, 0)
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podInformer := informerFactory.Core().V1().Pods()
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// Need to add testPod to the store.
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podInformer.Informer().GetStore().Add(testPod)
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queue := internalqueue.NewPriorityQueue(nil, informerFactory, internalqueue.WithClock(testingclock.NewFakeClock(time.Now())))
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schedulerCache := internalcache.New(30*time.Second, stopCh)
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for i := range tt.nodes {
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node := tt.nodes[i]
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// Add node to schedulerCache no matter it's deleted in API server or not.
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schedulerCache.AddNode(&node)
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if node.Name == tt.nodeNameToDelete {
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client.CoreV1().Nodes().Delete(context.TODO(), node.Name, metav1.DeleteOptions{})
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}
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}
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testPodInfo := &framework.QueuedPodInfo{PodInfo: framework.NewPodInfo(testPod)}
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errFunc := MakeDefaultErrorFunc(client, podInformer.Lister(), queue, schedulerCache)
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errFunc(testPodInfo, tt.injectErr)
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gotNodes := schedulerCache.Dump().Nodes
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gotNodeNames := sets.NewString()
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for _, nodeInfo := range gotNodes {
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gotNodeNames.Insert(nodeInfo.Node().Name)
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}
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if diff := cmp.Diff(tt.expectNodeNames, gotNodeNames); diff != "" {
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t.Errorf("Unexpected nodes (-want, +got): %s", diff)
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}
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})
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}
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}
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func TestDefaultErrorFunc_PodAlreadyBound(t *testing.T) {
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stopCh := make(chan struct{})
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defer close(stopCh)
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nodeFoo := v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "foo"}}
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testPod := &v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "test-pod", Namespace: "default"}, Spec: v1.PodSpec{NodeName: "foo"}}
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client := fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testPod}}, &v1.NodeList{Items: []v1.Node{nodeFoo}})
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informerFactory := informers.NewSharedInformerFactory(client, 0)
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podInformer := informerFactory.Core().V1().Pods()
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// Need to add testPod to the store.
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podInformer.Informer().GetStore().Add(testPod)
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queue := internalqueue.NewPriorityQueue(nil, informerFactory, internalqueue.WithClock(testingclock.NewFakeClock(time.Now())))
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schedulerCache := internalcache.New(30*time.Second, stopCh)
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// Add node to schedulerCache no matter it's deleted in API server or not.
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schedulerCache.AddNode(&nodeFoo)
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testPodInfo := &framework.QueuedPodInfo{PodInfo: framework.NewPodInfo(testPod)}
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errFunc := MakeDefaultErrorFunc(client, podInformer.Lister(), queue, schedulerCache)
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errFunc(testPodInfo, fmt.Errorf("binding rejected: timeout"))
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pod := getPodFromPriorityQueue(queue, testPod)
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if pod != nil {
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t.Fatalf("Unexpected pod: %v should not be in PriorityQueue when the NodeName of pod is not empty", pod.Name)
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}
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}
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// getPodFromPriorityQueue is the function used in the TestDefaultErrorFunc test to get
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// the specific pod from the given priority queue. It returns the found pod in the priority queue.
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func getPodFromPriorityQueue(queue *internalqueue.PriorityQueue, pod *v1.Pod) *v1.Pod {
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podList := queue.PendingPods()
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if len(podList) == 0 {
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return nil
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}
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queryPodKey, err := cache.MetaNamespaceKeyFunc(pod)
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if err != nil {
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return nil
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}
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for _, foundPod := range podList {
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foundPodKey, err := cache.MetaNamespaceKeyFunc(foundPod)
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if err != nil {
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return nil
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}
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if foundPodKey == queryPodKey {
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return foundPod
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}
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}
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return nil
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}
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func newConfigFactoryWithFrameworkRegistry(
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client clientset.Interface, stopCh <-chan struct{},
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registry frameworkruntime.Registry) *Configurator {
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informerFactory := informers.NewSharedInformerFactory(client, 0)
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snapshot := internalcache.NewEmptySnapshot()
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recorderFactory := profile.NewRecorderFactory(events.NewBroadcaster(&events.EventSinkImpl{Interface: client.EventsV1()}))
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return &Configurator{
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client: client,
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informerFactory: informerFactory,
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percentageOfNodesToScore: schedulerapi.DefaultPercentageOfNodesToScore,
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podInitialBackoffSeconds: podInitialBackoffDurationSeconds,
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podMaxBackoffSeconds: podMaxBackoffDurationSeconds,
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StopEverything: stopCh,
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registry: registry,
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profiles: []schedulerapi.KubeSchedulerProfile{
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{
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SchedulerName: testSchedulerName,
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Plugins: &schedulerapi.Plugins{
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QueueSort: schedulerapi.PluginSet{Enabled: []schedulerapi.Plugin{{Name: "PrioritySort"}}},
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Bind: schedulerapi.PluginSet{Enabled: []schedulerapi.Plugin{{Name: "DefaultBinder"}}},
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},
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},
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},
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recorderFactory: recorderFactory,
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nodeInfoSnapshot: snapshot,
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clusterEventMap: make(map[framework.ClusterEvent]sets.String),
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}
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}
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func newConfigFactory(client clientset.Interface, stopCh <-chan struct{}) *Configurator {
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return newConfigFactoryWithFrameworkRegistry(client, stopCh,
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frameworkplugins.NewInTreeRegistry())
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}
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type fakeExtender struct {
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isBinder bool
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interestedPodName string
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ignorable bool
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gotBind bool
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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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_ map[string]*extenderv1.Victims,
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_ framework.NodeInfoLister,
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) (map[string]*extenderv1.Victims, error) {
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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 false
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}
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func (f *fakeExtender) Filter(pod *v1.Pod, nodes []*v1.Node) ([]*v1.Node, 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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_ []*v1.Node,
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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(binding *v1.Binding) error {
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if f.isBinder {
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f.gotBind = true
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return nil
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}
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return errors.New("not a binder")
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}
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func (f *fakeExtender) IsBinder() bool {
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return f.isBinder
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}
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func (f *fakeExtender) IsInterested(pod *v1.Pod) bool {
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return pod != nil && pod.Name == f.interestedPodName
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}
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type TestPlugin struct {
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name string
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}
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var _ framework.ScorePlugin = &TestPlugin{}
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var _ framework.FilterPlugin = &TestPlugin{}
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func (t *TestPlugin) Name() string {
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return t.name
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}
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func (t *TestPlugin) Score(ctx context.Context, state *framework.CycleState, p *v1.Pod, nodeName string) (int64, *framework.Status) {
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return 1, nil
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}
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func (t *TestPlugin) ScoreExtensions() framework.ScoreExtensions {
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return nil
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}
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func (t *TestPlugin) Filter(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeInfo *framework.NodeInfo) *framework.Status {
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return nil
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}
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