552 lines
18 KiB
Go
552 lines
18 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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"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/runtime"
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"k8s.io/apimachinery/pkg/util/clock"
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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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apicore "k8s.io/kubernetes/pkg/apis/core"
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schedulerapi "k8s.io/kubernetes/pkg/scheduler/apis/config"
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"k8s.io/kubernetes/pkg/scheduler/apis/config/scheme"
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frameworkplugins "k8s.io/kubernetes/pkg/scheduler/framework/plugins"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/defaultbinder"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/interpodaffinity"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodelabel"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/queuesort"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/serviceaffinity"
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frameworkruntime "k8s.io/kubernetes/pkg/scheduler/framework/runtime"
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framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
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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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)
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const (
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disablePodPreemption = false
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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.createFromProvider(schedulerapi.SchedulerDefaultProviderName); err != nil {
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t.Error(err)
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}
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}
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// Test configures a scheduler from a policies defined in a file
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// It combines some configurable predicate/priorities with some pre-defined ones
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func TestCreateFromConfig(t *testing.T) {
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var configData []byte
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configData = []byte(`{
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"kind" : "Policy",
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"apiVersion" : "v1",
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"predicates" : [
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{"name" : "TestZoneAffinity", "argument" : {"serviceAffinity" : {"labels" : ["zone"]}}},
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{"name" : "TestZoneAffinity", "argument" : {"serviceAffinity" : {"labels" : ["foo"]}}},
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{"name" : "TestRequireZone", "argument" : {"labelsPresence" : {"labels" : ["zone"], "presence" : true}}},
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{"name" : "TestNoFooLabel", "argument" : {"labelsPresence" : {"labels" : ["foo"], "presence" : false}}},
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{"name" : "PodFitsResources"},
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{"name" : "PodFitsHostPorts"}
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],
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"priorities" : [
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{"name" : "RackSpread", "weight" : 3, "argument" : {"serviceAntiAffinity" : {"label" : "rack"}}},
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{"name" : "ZoneSpread", "weight" : 3, "argument" : {"serviceAntiAffinity" : {"label" : "zone"}}},
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{"name" : "LabelPreference1", "weight" : 3, "argument" : {"labelPreference" : {"label" : "l1", "presence": true}}},
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{"name" : "LabelPreference2", "weight" : 3, "argument" : {"labelPreference" : {"label" : "l2", "presence": false}}},
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{"name" : "NodeAffinityPriority", "weight" : 2},
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{"name" : "ImageLocalityPriority", "weight" : 1} ]
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}`)
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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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var policy schedulerapi.Policy
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if err := runtime.DecodeInto(scheme.Codecs.UniversalDecoder(), configData, &policy); err != nil {
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t.Errorf("Invalid configuration: %v", err)
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}
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sched, err := factory.createFromConfig(policy)
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if err != nil {
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t.Fatalf("createFromConfig failed: %v", err)
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}
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// createFromConfig is the old codepath where we only have one profile.
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prof := sched.Profiles[testSchedulerName]
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queueSortPls := prof.ListPlugins()["QueueSortPlugin"]
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wantQueuePls := []schedulerapi.Plugin{{Name: queuesort.Name}}
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if diff := cmp.Diff(wantQueuePls, queueSortPls); diff != "" {
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t.Errorf("Unexpected QueueSort plugins (-want, +got): %s", diff)
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}
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bindPls := prof.ListPlugins()["BindPlugin"]
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wantBindPls := []schedulerapi.Plugin{{Name: defaultbinder.Name}}
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if diff := cmp.Diff(wantBindPls, bindPls); diff != "" {
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t.Errorf("Unexpected Bind plugins (-want, +got): %s", diff)
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}
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// Verify that node label predicate/priority are converted to framework plugins.
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var wantArgs runtime.Object = &schedulerapi.NodeLabelArgs{
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PresentLabels: []string{"zone"},
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AbsentLabels: []string{"foo"},
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PresentLabelsPreference: []string{"l1"},
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AbsentLabelsPreference: []string{"l2"},
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}
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verifyPluginConvertion(t, nodelabel.Name, []string{"FilterPlugin", "ScorePlugin"}, prof, &factory.profiles[0], 6, wantArgs)
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// Verify that service affinity custom predicate/priority is converted to framework plugin.
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wantArgs = &schedulerapi.ServiceAffinityArgs{
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AffinityLabels: []string{"zone", "foo"},
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AntiAffinityLabelsPreference: []string{"rack", "zone"},
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}
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verifyPluginConvertion(t, serviceaffinity.Name, []string{"FilterPlugin", "ScorePlugin"}, prof, &factory.profiles[0], 6, wantArgs)
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// TODO(#87703): Verify all plugin configs.
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}
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func verifyPluginConvertion(t *testing.T, name string, extensionPoints []string, prof *profile.Profile, cfg *schedulerapi.KubeSchedulerProfile, wantWeight int32, wantArgs runtime.Object) {
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for _, extensionPoint := range extensionPoints {
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plugin, ok := findPlugin(name, extensionPoint, prof)
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if !ok {
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t.Fatalf("%q plugin does not exist in framework.", name)
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}
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if extensionPoint == "ScorePlugin" {
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if plugin.Weight != wantWeight {
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t.Errorf("Wrong weight. Got: %v, want: %v", plugin.Weight, wantWeight)
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}
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}
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// Verify that the policy config is converted to plugin config.
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pluginConfig := findPluginConfig(name, cfg)
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if diff := cmp.Diff(wantArgs, pluginConfig.Args); diff != "" {
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t.Errorf("Config for %v plugin mismatch (-want,+got):\n%s", name, diff)
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}
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}
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}
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func findPlugin(name, extensionPoint string, prof *profile.Profile) (schedulerapi.Plugin, bool) {
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for _, pl := range prof.ListPlugins()[extensionPoint] {
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if pl.Name == name {
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return pl, true
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}
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}
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return schedulerapi.Plugin{}, false
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}
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func findPluginConfig(name string, prof *schedulerapi.KubeSchedulerProfile) schedulerapi.PluginConfig {
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for _, c := range prof.PluginConfig {
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if c.Name == name {
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return c
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}
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}
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return schedulerapi.PluginConfig{}
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}
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func TestCreateFromConfigWithHardPodAffinitySymmetricWeight(t *testing.T) {
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var configData []byte
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var policy schedulerapi.Policy
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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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configData = []byte(`{
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"kind" : "Policy",
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"apiVersion" : "v1",
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"predicates" : [
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{"name" : "TestZoneAffinity", "argument" : {"serviceAffinity" : {"labels" : ["zone"]}}},
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{"name" : "TestRequireZone", "argument" : {"labelsPresence" : {"labels" : ["zone"], "presence" : true}}},
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{"name" : "PodFitsResources"},
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{"name" : "PodFitsHostPorts"}
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],
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"priorities" : [
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{"name" : "RackSpread", "weight" : 3, "argument" : {"serviceAntiAffinity" : {"label" : "rack"}}},
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{"name" : "NodeAffinityPriority", "weight" : 2},
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{"name" : "ImageLocalityPriority", "weight" : 1},
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{"name" : "InterPodAffinityPriority", "weight" : 1}
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],
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"hardPodAffinitySymmetricWeight" : 10
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}`)
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if err := runtime.DecodeInto(scheme.Codecs.UniversalDecoder(), configData, &policy); err != nil {
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t.Fatalf("Invalid configuration: %v", err)
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}
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if _, err := factory.createFromConfig(policy); err != nil {
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t.Fatal(err)
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}
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// TODO(#87703): Verify that the entire pluginConfig is correct.
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foundAffinityCfg := false
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for _, cfg := range factory.profiles[0].PluginConfig {
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if cfg.Name == interpodaffinity.Name {
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foundAffinityCfg = true
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wantArgs := &schedulerapi.InterPodAffinityArgs{HardPodAffinityWeight: 10}
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if diff := cmp.Diff(wantArgs, cfg.Args); diff != "" {
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t.Errorf("wrong InterPodAffinity args (-want, +got): %s", diff)
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}
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}
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}
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if !foundAffinityCfg {
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t.Errorf("args for InterPodAffinity were not found")
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}
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}
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func TestCreateFromEmptyConfig(t *testing.T) {
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var configData []byte
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var policy schedulerapi.Policy
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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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configData = []byte(`{}`)
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if err := runtime.DecodeInto(scheme.Codecs.UniversalDecoder(), configData, &policy); err != nil {
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t.Errorf("Invalid configuration: %v", err)
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}
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if _, err := factory.createFromConfig(policy); err != nil {
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t.Fatal(err)
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}
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prof := factory.profiles[0]
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wantConfig := []schedulerapi.PluginConfig{}
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if diff := cmp.Diff(wantConfig, prof.PluginConfig); diff != "" {
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t.Errorf("wrong plugin config (-want, +got): %s", diff)
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}
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}
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// Test configures a scheduler from a policy that does not specify any
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// predicate/priority.
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// The predicate/priority from DefaultProvider will be used.
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func TestCreateFromConfigWithUnspecifiedPredicatesOrPriorities(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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configData := []byte(`{
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"kind" : "Policy",
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"apiVersion" : "v1"
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}`)
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var policy schedulerapi.Policy
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if err := runtime.DecodeInto(scheme.Codecs.UniversalDecoder(), configData, &policy); err != nil {
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t.Fatalf("Invalid configuration: %v", err)
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}
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sched, err := factory.createFromConfig(policy)
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if err != nil {
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t.Fatalf("Failed to create scheduler from configuration: %v", err)
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}
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if _, exist := findPlugin("NodeResourcesFit", "FilterPlugin", sched.Profiles[testSchedulerName]); !exist {
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t.Errorf("Expected plugin NodeResourcesFit")
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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, internalqueue.WithClock(clock.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{Pod: 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(apicore.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(apicore.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, internalqueue.WithClock(clock.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{Pod: 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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// 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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podInformer: informerFactory.Core().V1().Pods(),
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disablePreemption: disablePodPreemption,
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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,
|
|
profiles: []schedulerapi.KubeSchedulerProfile{
|
|
{SchedulerName: testSchedulerName},
|
|
},
|
|
recorderFactory: recorderFactory,
|
|
nodeInfoSnapshot: snapshot,
|
|
}
|
|
}
|
|
|
|
func newConfigFactory(client clientset.Interface, stopCh <-chan struct{}) *Configurator {
|
|
return newConfigFactoryWithFrameworkRegistry(client, stopCh,
|
|
frameworkplugins.NewInTreeRegistry())
|
|
}
|
|
|
|
type fakeExtender struct {
|
|
isBinder bool
|
|
interestedPodName string
|
|
ignorable bool
|
|
gotBind bool
|
|
}
|
|
|
|
func (f *fakeExtender) Name() string {
|
|
return "fakeExtender"
|
|
}
|
|
|
|
func (f *fakeExtender) IsIgnorable() bool {
|
|
return f.ignorable
|
|
}
|
|
|
|
func (f *fakeExtender) ProcessPreemption(
|
|
_ *v1.Pod,
|
|
_ map[string]*extenderv1.Victims,
|
|
_ framework.NodeInfoLister,
|
|
) (map[string]*extenderv1.Victims, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func (f *fakeExtender) SupportsPreemption() bool {
|
|
return false
|
|
}
|
|
|
|
func (f *fakeExtender) Filter(pod *v1.Pod, nodes []*v1.Node) (filteredNodes []*v1.Node, failedNodesMap extenderv1.FailedNodesMap, err error) {
|
|
return nil, nil, nil
|
|
}
|
|
|
|
func (f *fakeExtender) Prioritize(
|
|
_ *v1.Pod,
|
|
_ []*v1.Node,
|
|
) (hostPriorities *extenderv1.HostPriorityList, weight int64, err error) {
|
|
return nil, 0, nil
|
|
}
|
|
|
|
func (f *fakeExtender) Bind(binding *v1.Binding) error {
|
|
if f.isBinder {
|
|
f.gotBind = true
|
|
return nil
|
|
}
|
|
return errors.New("not a binder")
|
|
}
|
|
|
|
func (f *fakeExtender) IsBinder() bool {
|
|
return f.isBinder
|
|
}
|
|
|
|
func (f *fakeExtender) IsInterested(pod *v1.Pod) bool {
|
|
return pod != nil && pod.Name == f.interestedPodName
|
|
}
|
|
|
|
type TestPlugin struct {
|
|
name string
|
|
}
|
|
|
|
var _ framework.ScorePlugin = &TestPlugin{}
|
|
var _ framework.FilterPlugin = &TestPlugin{}
|
|
|
|
func (t *TestPlugin) Name() string {
|
|
return t.name
|
|
}
|
|
|
|
func (t *TestPlugin) Score(ctx context.Context, state *framework.CycleState, p *v1.Pod, nodeName string) (int64, *framework.Status) {
|
|
return 1, nil
|
|
}
|
|
|
|
func (t *TestPlugin) ScoreExtensions() framework.ScoreExtensions {
|
|
return nil
|
|
}
|
|
|
|
func (t *TestPlugin) Filter(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeInfo *framework.NodeInfo) *framework.Status {
|
|
return nil
|
|
}
|