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243c7ff11b
- refactor test cases to table driven testing style - more scenarios are covered for TaintNodesByCondition - update bazel stuff
675 lines
16 KiB
Go
675 lines
16 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package scheduler
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// This file tests the Taint feature.
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import (
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"fmt"
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"testing"
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"time"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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restclient "k8s.io/client-go/rest"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
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internalinformers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion"
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"k8s.io/kubernetes/pkg/controller/nodelifecycle"
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kubeadmission "k8s.io/kubernetes/pkg/kubeapiserver/admission"
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"k8s.io/kubernetes/pkg/scheduler/algorithm"
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"k8s.io/kubernetes/pkg/scheduler/algorithmprovider"
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"k8s.io/kubernetes/plugin/pkg/admission/podtolerationrestriction"
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pluginapi "k8s.io/kubernetes/plugin/pkg/admission/podtolerationrestriction/apis/podtolerationrestriction"
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)
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func newPod(nsName, name string, req, limit v1.ResourceList) *v1.Pod {
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Namespace: nsName,
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "busybox",
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Image: "busybox",
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Resources: v1.ResourceRequirements{
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Requests: req,
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Limits: limit,
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},
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},
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},
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},
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}
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}
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// TestTaintNodeByCondition tests related cases for TaintNodeByCondition feature.
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func TestTaintNodeByCondition(t *testing.T) {
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enabled := utilfeature.DefaultFeatureGate.Enabled("TaintNodesByCondition")
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defer func() {
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if !enabled {
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utilfeature.DefaultFeatureGate.Set("TaintNodesByCondition=False")
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}
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}()
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// Enable TaintNodeByCondition
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utilfeature.DefaultFeatureGate.Set("TaintNodesByCondition=True")
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// Build PodToleration Admission.
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admission := podtolerationrestriction.NewPodTolerationsPlugin(&pluginapi.Configuration{})
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context := initTestMaster(t, "default", admission)
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// Build clientset and informers for controllers.
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internalClientset := internalclientset.NewForConfigOrDie(&restclient.Config{
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QPS: -1,
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Host: context.httpServer.URL,
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ContentConfig: restclient.ContentConfig{GroupVersion: &schema.GroupVersion{Group: "", Version: "v1"}}})
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internalInformers := internalinformers.NewSharedInformerFactory(internalClientset, time.Second)
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kubeadmission.WantsInternalKubeClientSet(admission).SetInternalKubeClientSet(internalClientset)
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kubeadmission.WantsInternalKubeInformerFactory(admission).SetInternalKubeInformerFactory(internalInformers)
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controllerCh := make(chan struct{})
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defer close(controllerCh)
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// Apply feature gates to enable TaintNodesByCondition
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algorithmprovider.ApplyFeatureGates()
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context = initTestScheduler(t, context, controllerCh, false, nil)
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cs := context.clientSet
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informers := context.informerFactory
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nsName := context.ns.Name
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// Start NodeLifecycleController for taint.
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nc, err := nodelifecycle.NewNodeLifecycleController(
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informers.Core().V1().Pods(),
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informers.Core().V1().Nodes(),
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informers.Extensions().V1beta1().DaemonSets(),
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nil, // CloudProvider
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cs,
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time.Second, // Node monitor grace period
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time.Second, // Node startup grace period
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time.Second, // Node monitor period
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time.Second, // Pod eviction timeout
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100, // Eviction limiter QPS
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100, // Secondary eviction limiter QPS
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100, // Large cluster threshold
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100, // Unhealthy zone threshold
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true, // Run taint manager
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true, // Use taint based evictions
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true, // Enabled TaintNodeByCondition feature
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)
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if err != nil {
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t.Errorf("Failed to create node controller: %v", err)
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return
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}
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go nc.Run(controllerCh)
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// Waiting for all controller sync.
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internalInformers.Start(controllerCh)
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internalInformers.WaitForCacheSync(controllerCh)
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// -------------------------------------------
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// Test TaintNodeByCondition feature.
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// -------------------------------------------
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nodeRes := v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("4000m"),
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v1.ResourceMemory: resource.MustParse("16Gi"),
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v1.ResourcePods: resource.MustParse("110"),
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}
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podRes := v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("100m"),
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v1.ResourceMemory: resource.MustParse("100Mi"),
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}
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notReadyToleration := v1.Toleration{
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Key: algorithm.TaintNodeNotReady,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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unreachableToleration := v1.Toleration{
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Key: algorithm.TaintNodeUnreachable,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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unschedulableToleration := v1.Toleration{
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Key: algorithm.TaintNodeUnschedulable,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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outOfDiskToleration := v1.Toleration{
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Key: algorithm.TaintNodeOutOfDisk,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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memoryPressureToleration := v1.Toleration{
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Key: algorithm.TaintNodeMemoryPressure,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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diskPressureToleration := v1.Toleration{
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Key: algorithm.TaintNodeDiskPressure,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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networkUnavailableToleration := v1.Toleration{
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Key: algorithm.TaintNodeNetworkUnavailable,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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pidPressureToleration := v1.Toleration{
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Key: algorithm.TaintNodePIDPressure,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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bestEffortPod := newPod(nsName, "besteffort-pod", nil, nil)
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burstablePod := newPod(nsName, "burstable-pod", podRes, nil)
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guaranteePod := newPod(nsName, "guarantee-pod", podRes, podRes)
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type podCase struct {
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pod *v1.Pod
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tolerations []v1.Toleration
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fits bool
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}
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// switch to table driven testings
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tests := []struct {
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name string
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existingTaints []v1.Taint
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nodeConditions []v1.NodeCondition
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unschedulable bool
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expectedTaints []v1.Taint
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pods []podCase
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}{
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{
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name: "not-ready node",
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodeReady,
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Status: v1.ConditionFalse,
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeNotReady,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: burstablePod,
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fits: false,
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},
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{
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pod: guaranteePod,
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fits: false,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{notReadyToleration},
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fits: true,
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},
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},
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},
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{
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name: "unreachable node",
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existingTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeUnreachable,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodeReady,
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Status: v1.ConditionUnknown, // node status is "Unknown"
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeUnreachable,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: burstablePod,
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fits: false,
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},
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{
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pod: guaranteePod,
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fits: false,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{unreachableToleration},
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fits: true,
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},
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},
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},
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{
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name: "unschedulable node",
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unschedulable: true, // node.spec.unschedulable = true
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodeReady,
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Status: v1.ConditionTrue,
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeUnschedulable,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: burstablePod,
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fits: false,
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},
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{
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pod: guaranteePod,
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fits: false,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{unschedulableToleration},
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fits: true,
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},
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},
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},
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{
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name: "out of disk node",
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodeOutOfDisk,
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Status: v1.ConditionTrue,
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},
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{
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Type: v1.NodeReady,
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Status: v1.ConditionTrue,
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeOutOfDisk,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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// In OutOfDisk condition, only pods with toleration can be scheduled.
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: burstablePod,
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fits: false,
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},
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{
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pod: guaranteePod,
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fits: false,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{outOfDiskToleration},
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fits: true,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{diskPressureToleration},
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fits: false,
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},
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},
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},
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{
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name: "memory pressure node",
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodeMemoryPressure,
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Status: v1.ConditionTrue,
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},
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{
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Type: v1.NodeReady,
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Status: v1.ConditionTrue,
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeMemoryPressure,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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// In MemoryPressure condition, both Burstable and Guarantee pods are scheduled;
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// BestEffort pod with toleration are also scheduled.
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{memoryPressureToleration},
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fits: true,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{diskPressureToleration},
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fits: false,
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},
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{
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pod: burstablePod,
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fits: true,
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},
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{
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pod: guaranteePod,
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fits: true,
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},
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},
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},
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{
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name: "disk pressure node",
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodeDiskPressure,
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Status: v1.ConditionTrue,
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},
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{
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Type: v1.NodeReady,
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Status: v1.ConditionTrue,
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeDiskPressure,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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// In DiskPressure condition, only pods with toleration can be scheduled.
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: burstablePod,
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fits: false,
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},
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{
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pod: guaranteePod,
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fits: false,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{diskPressureToleration},
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fits: true,
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},
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{
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pod: bestEffortPod,
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tolerations: []v1.Toleration{memoryPressureToleration},
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fits: false,
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},
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},
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},
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{
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name: "network unavailable and node is ready",
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodeNetworkUnavailable,
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Status: v1.ConditionTrue,
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},
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{
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Type: v1.NodeReady,
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Status: v1.ConditionTrue,
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeNetworkUnavailable,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: burstablePod,
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fits: false,
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},
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{
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pod: guaranteePod,
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fits: false,
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},
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{
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pod: burstablePod,
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tolerations: []v1.Toleration{
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networkUnavailableToleration,
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},
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fits: true,
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},
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},
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},
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{
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name: "network unavailable and node is not ready",
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodeNetworkUnavailable,
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Status: v1.ConditionTrue,
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},
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{
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Type: v1.NodeReady,
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Status: v1.ConditionFalse,
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodeNetworkUnavailable,
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Effect: v1.TaintEffectNoSchedule,
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},
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{
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Key: algorithm.TaintNodeNotReady,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: burstablePod,
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fits: false,
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},
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{
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pod: guaranteePod,
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fits: false,
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},
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{
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pod: burstablePod,
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tolerations: []v1.Toleration{
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networkUnavailableToleration,
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},
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fits: false,
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},
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{
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pod: burstablePod,
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tolerations: []v1.Toleration{
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networkUnavailableToleration,
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notReadyToleration,
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},
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fits: true,
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},
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},
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},
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{
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name: "pid pressure node",
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nodeConditions: []v1.NodeCondition{
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{
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Type: v1.NodePIDPressure,
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Status: v1.ConditionTrue,
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},
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{
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Type: v1.NodeReady,
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Status: v1.ConditionTrue,
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},
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},
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expectedTaints: []v1.Taint{
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{
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Key: algorithm.TaintNodePIDPressure,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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pods: []podCase{
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{
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pod: bestEffortPod,
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fits: false,
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},
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{
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pod: burstablePod,
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fits: false,
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},
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{
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pod: guaranteePod,
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fits: false,
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},
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{
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pod: bestEffortPod,
|
|
tolerations: []v1.Toleration{pidPressureToleration},
|
|
fits: true,
|
|
},
|
|
},
|
|
},
|
|
{
|
|
name: "multi taints on node",
|
|
nodeConditions: []v1.NodeCondition{
|
|
{
|
|
Type: v1.NodePIDPressure,
|
|
Status: v1.ConditionTrue,
|
|
},
|
|
{
|
|
Type: v1.NodeMemoryPressure,
|
|
Status: v1.ConditionTrue,
|
|
},
|
|
{
|
|
Type: v1.NodeDiskPressure,
|
|
Status: v1.ConditionTrue,
|
|
},
|
|
{
|
|
Type: v1.NodeReady,
|
|
Status: v1.ConditionTrue,
|
|
},
|
|
},
|
|
expectedTaints: []v1.Taint{
|
|
{
|
|
Key: algorithm.TaintNodeDiskPressure,
|
|
Effect: v1.TaintEffectNoSchedule,
|
|
},
|
|
{
|
|
Key: algorithm.TaintNodeMemoryPressure,
|
|
Effect: v1.TaintEffectNoSchedule,
|
|
},
|
|
{
|
|
Key: algorithm.TaintNodePIDPressure,
|
|
Effect: v1.TaintEffectNoSchedule,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
t.Run(test.name, func(t *testing.T) {
|
|
node := &v1.Node{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "node-1",
|
|
},
|
|
Spec: v1.NodeSpec{
|
|
Unschedulable: test.unschedulable,
|
|
Taints: test.existingTaints,
|
|
},
|
|
Status: v1.NodeStatus{
|
|
Capacity: nodeRes,
|
|
Allocatable: nodeRes,
|
|
Conditions: test.nodeConditions,
|
|
},
|
|
}
|
|
|
|
if _, err := cs.CoreV1().Nodes().Create(node); err != nil {
|
|
t.Errorf("Failed to create node, err: %v", err)
|
|
}
|
|
if err := waitForNodeTaints(cs, node, test.expectedTaints); err != nil {
|
|
t.Errorf("Failed to taint node, err: %v", err)
|
|
}
|
|
|
|
var pods []*v1.Pod
|
|
for i, p := range test.pods {
|
|
pod := p.pod.DeepCopy()
|
|
pod.Name = fmt.Sprintf("%s-%d", pod.Name, i)
|
|
pod.Spec.Tolerations = p.tolerations
|
|
|
|
createdPod, err := cs.CoreV1().Pods(pod.Namespace).Create(pod)
|
|
if err != nil {
|
|
t.Fatalf("Failed to create pod %s/%s, error: %v",
|
|
pod.Namespace, pod.Name, err)
|
|
}
|
|
|
|
pods = append(pods, createdPod)
|
|
|
|
if p.fits {
|
|
if err := waitForPodToSchedule(cs, createdPod); err != nil {
|
|
t.Errorf("Failed to schedule pod %s/%s on the node, err: %v",
|
|
pod.Namespace, pod.Name, err)
|
|
}
|
|
} else {
|
|
if err := waitForPodUnschedulable(cs, createdPod); err != nil {
|
|
t.Errorf("Unschedulable pod %s/%s gets scheduled on the node, err: %v",
|
|
pod.Namespace, pod.Name, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
cleanupPods(cs, t, pods)
|
|
cleanupNodes(cs, t)
|
|
})
|
|
}
|
|
}
|