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util.go
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/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package util
import (
"context"
"errors"
"fmt"
"testing"
"time"
v1 "k8s.io/api/core/v1"
policy "k8s.io/api/policy/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/apiserver/pkg/admission"
cacheddiscovery "k8s.io/client-go/discovery/cached/memory"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/dynamic/dynamicinformer"
"k8s.io/client-go/informers"
coreinformers "k8s.io/client-go/informers/core/v1"
clientset "k8s.io/client-go/kubernetes"
corelisters "k8s.io/client-go/listers/core/v1"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/restmapper"
"k8s.io/client-go/scale"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/events"
pvutil "k8s.io/component-helpers/storage/volume"
"k8s.io/klog/v2"
"k8s.io/kube-scheduler/config/v1beta3"
"k8s.io/kubernetes/cmd/kube-apiserver/app/options"
podutil "k8s.io/kubernetes/pkg/api/v1/pod"
"k8s.io/kubernetes/pkg/controller/disruption"
"k8s.io/kubernetes/pkg/controlplane"
"k8s.io/kubernetes/pkg/scheduler"
kubeschedulerconfig "k8s.io/kubernetes/pkg/scheduler/apis/config"
configtesting "k8s.io/kubernetes/pkg/scheduler/apis/config/testing"
schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework"
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/defaultpreemption"
"k8s.io/kubernetes/pkg/scheduler/profile"
st "k8s.io/kubernetes/pkg/scheduler/testing"
taintutils "k8s.io/kubernetes/pkg/util/taints"
"k8s.io/kubernetes/test/integration/framework"
imageutils "k8s.io/kubernetes/test/utils/image"
"k8s.io/utils/pointer"
)
// ShutdownFunc represents the function handle to be called, typically in a defer handler, to shutdown a running module
type ShutdownFunc func()
// StartScheduler configures and starts a scheduler given a handle to the clientSet interface
// and event broadcaster. It returns the running scheduler, podInformer and the shutdown function to stop it.
func StartScheduler(clientSet clientset.Interface, kubeConfig *restclient.Config, cfg *kubeschedulerconfig.KubeSchedulerConfiguration) (*scheduler.Scheduler, coreinformers.PodInformer, ShutdownFunc) {
ctx, cancel := context.WithCancel(context.Background())
informerFactory := scheduler.NewInformerFactory(clientSet, 0)
evtBroadcaster := events.NewBroadcaster(&events.EventSinkImpl{
Interface: clientSet.EventsV1()})
evtBroadcaster.StartRecordingToSink(ctx.Done())
sched, err := scheduler.New(
clientSet,
informerFactory,
nil,
profile.NewRecorderFactory(evtBroadcaster),
ctx.Done(),
scheduler.WithKubeConfig(kubeConfig),
scheduler.WithProfiles(cfg.Profiles...),
scheduler.WithPercentageOfNodesToScore(cfg.PercentageOfNodesToScore),
scheduler.WithPodMaxBackoffSeconds(cfg.PodMaxBackoffSeconds),
scheduler.WithPodInitialBackoffSeconds(cfg.PodInitialBackoffSeconds),
scheduler.WithExtenders(cfg.Extenders...),
scheduler.WithParallelism(cfg.Parallelism))
if err != nil {
klog.Fatalf("Error creating scheduler: %v", err)
}
informerFactory.Start(ctx.Done())
informerFactory.WaitForCacheSync(ctx.Done())
go sched.Run(ctx)
shutdownFunc := func() {
klog.Infof("destroying scheduler")
cancel()
klog.Infof("destroyed scheduler")
}
return sched, informerFactory.Core().V1().Pods(), shutdownFunc
}
// StartFakePVController is a simplified pv controller logic that sets PVC VolumeName and annotation for each PV binding.
// TODO(mborsz): Use a real PV controller here.
func StartFakePVController(clientSet clientset.Interface) ShutdownFunc {
ctx, cancel := context.WithCancel(context.Background())
informerFactory := informers.NewSharedInformerFactory(clientSet, 0)
pvInformer := informerFactory.Core().V1().PersistentVolumes()
syncPV := func(obj *v1.PersistentVolume) {
ctx := context.Background()
if obj.Spec.ClaimRef != nil {
claimRef := obj.Spec.ClaimRef
pvc, err := clientSet.CoreV1().PersistentVolumeClaims(claimRef.Namespace).Get(ctx, claimRef.Name, metav1.GetOptions{})
if err != nil {
klog.Errorf("error while getting %v/%v: %v", claimRef.Namespace, claimRef.Name, err)
return
}
if pvc.Spec.VolumeName == "" {
pvc.Spec.VolumeName = obj.Name
metav1.SetMetaDataAnnotation(&pvc.ObjectMeta, pvutil.AnnBindCompleted, "yes")
_, err := clientSet.CoreV1().PersistentVolumeClaims(claimRef.Namespace).Update(ctx, pvc, metav1.UpdateOptions{})
if err != nil {
klog.Errorf("error while updating %v/%v: %v", claimRef.Namespace, claimRef.Name, err)
return
}
}
}
}
pvInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
syncPV(obj.(*v1.PersistentVolume))
},
UpdateFunc: func(_, obj interface{}) {
syncPV(obj.(*v1.PersistentVolume))
},
})
informerFactory.Start(ctx.Done())
return ShutdownFunc(cancel)
}
// TestContext store necessary context info
type TestContext struct {
CloseFn framework.TearDownFunc
NS *v1.Namespace
ClientSet clientset.Interface
KubeConfig *restclient.Config
InformerFactory informers.SharedInformerFactory
DynInformerFactory dynamicinformer.DynamicSharedInformerFactory
Scheduler *scheduler.Scheduler
Ctx context.Context
CancelFn context.CancelFunc
}
// CleanupNodes cleans all nodes which were created during integration test
func CleanupNodes(cs clientset.Interface, t *testing.T) {
err := cs.CoreV1().Nodes().DeleteCollection(context.TODO(), *metav1.NewDeleteOptions(0), metav1.ListOptions{})
if err != nil {
t.Errorf("error while deleting all nodes: %v", err)
}
}
// PodDeleted returns true if a pod is not found in the given namespace.
func PodDeleted(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
return func() (bool, error) {
pod, err := c.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
if apierrors.IsNotFound(err) {
return true, nil
}
if pod.DeletionTimestamp != nil {
return true, nil
}
return false, nil
}
}
// SyncInformerFactory starts informer and waits for caches to be synced
func SyncInformerFactory(testCtx *TestContext) {
testCtx.InformerFactory.Start(testCtx.Ctx.Done())
if testCtx.DynInformerFactory != nil {
testCtx.DynInformerFactory.Start(testCtx.Ctx.Done())
}
testCtx.InformerFactory.WaitForCacheSync(testCtx.Ctx.Done())
if testCtx.DynInformerFactory != nil {
testCtx.DynInformerFactory.WaitForCacheSync(testCtx.Ctx.Done())
}
}
// CleanupTest cleans related resources which were created during integration test
func CleanupTest(t *testing.T, testCtx *TestContext) {
// Kill the scheduler.
testCtx.CancelFn()
// Cleanup nodes.
testCtx.ClientSet.CoreV1().Nodes().DeleteCollection(context.TODO(), metav1.DeleteOptions{}, metav1.ListOptions{})
framework.DeleteNamespaceOrDie(testCtx.ClientSet, testCtx.NS, t)
testCtx.CloseFn()
}
// RemovePodFinalizers removes pod finalizers for the pods
func RemovePodFinalizers(cs clientset.Interface, t *testing.T, pods []*v1.Pod) {
for _, p := range pods {
pod, err := cs.CoreV1().Pods(p.Namespace).Get(context.TODO(), p.Name, metav1.GetOptions{})
if err != nil && !apierrors.IsNotFound(err) {
t.Errorf("error while removing pod finalizers for %v: %v", klog.KObj(p), err)
} else if pod != nil {
pod.ObjectMeta.Finalizers = nil
_, err = cs.CoreV1().Pods(pod.Namespace).Update(context.TODO(), pod, metav1.UpdateOptions{})
if err != nil {
t.Errorf("error while updating pod status for %v: %v", klog.KObj(p), err)
}
}
}
}
// CleanupPods deletes the given pods and waits for them to be actually deleted.
func CleanupPods(cs clientset.Interface, t *testing.T, pods []*v1.Pod) {
for _, p := range pods {
err := cs.CoreV1().Pods(p.Namespace).Delete(context.TODO(), p.Name, *metav1.NewDeleteOptions(0))
if err != nil && !apierrors.IsNotFound(err) {
t.Errorf("error while deleting pod %v/%v: %v", p.Namespace, p.Name, err)
}
}
for _, p := range pods {
if err := wait.Poll(time.Millisecond, wait.ForeverTestTimeout,
PodDeleted(cs, p.Namespace, p.Name)); err != nil {
t.Errorf("error while waiting for pod %v/%v to get deleted: %v", p.Namespace, p.Name, err)
}
}
}
// AddTaintToNode add taints to specific node
func AddTaintToNode(cs clientset.Interface, nodeName string, taint v1.Taint) error {
node, err := cs.CoreV1().Nodes().Get(context.TODO(), nodeName, metav1.GetOptions{})
if err != nil {
return err
}
node.Spec.Taints = append(node.Spec.Taints, taint)
_, err = cs.CoreV1().Nodes().Update(context.TODO(), node, metav1.UpdateOptions{})
return err
}
// RemoveTaintOffNode removes a specific taint from a node
func RemoveTaintOffNode(cs clientset.Interface, nodeName string, taint v1.Taint) error {
node, err := cs.CoreV1().Nodes().Get(context.TODO(), nodeName, metav1.GetOptions{})
if err != nil {
return err
}
var taints []v1.Taint
for _, t := range node.Spec.Taints {
if !t.MatchTaint(&taint) {
taints = append(taints, t)
}
}
node.Spec.Taints = taints
_, err = cs.CoreV1().Nodes().Update(context.TODO(), node, metav1.UpdateOptions{})
return err
}
// WaitForNodeTaints waits for a node to have the target taints and returns
// an error if it does not have taints within the given timeout.
func WaitForNodeTaints(cs clientset.Interface, node *v1.Node, taints []v1.Taint) error {
return wait.Poll(100*time.Millisecond, 30*time.Second, NodeTainted(cs, node.Name, taints))
}
// NodeTainted return a condition function that returns true if the given node contains
// the taints.
func NodeTainted(cs clientset.Interface, nodeName string, taints []v1.Taint) wait.ConditionFunc {
return func() (bool, error) {
node, err := cs.CoreV1().Nodes().Get(context.TODO(), nodeName, metav1.GetOptions{})
if err != nil {
return false, err
}
// node.Spec.Taints may have more taints
if len(taints) > len(node.Spec.Taints) {
return false, nil
}
for _, taint := range taints {
if !taintutils.TaintExists(node.Spec.Taints, &taint) {
return false, nil
}
}
return true, nil
}
}
// NodeReadyStatus returns the status of first condition with type NodeReady.
// If none of the condition is of type NodeReady, returns an error.
func NodeReadyStatus(conditions []v1.NodeCondition) (v1.ConditionStatus, error) {
for _, c := range conditions {
if c.Type != v1.NodeReady {
continue
}
// Just return the first condition with type NodeReady
return c.Status, nil
}
return v1.ConditionFalse, errors.New("None of the conditions is of type NodeReady")
}
// GetTolerationSeconds gets the period of time the toleration
func GetTolerationSeconds(tolerations []v1.Toleration) (int64, error) {
for _, t := range tolerations {
if t.Key == v1.TaintNodeNotReady && t.Effect == v1.TaintEffectNoExecute && t.Operator == v1.TolerationOpExists {
return *t.TolerationSeconds, nil
}
}
return 0, fmt.Errorf("cannot find toleration")
}
// NodeCopyWithConditions duplicates the ode object with conditions
func NodeCopyWithConditions(node *v1.Node, conditions []v1.NodeCondition) *v1.Node {
copy := node.DeepCopy()
copy.ResourceVersion = "0"
copy.Status.Conditions = conditions
for i := range copy.Status.Conditions {
copy.Status.Conditions[i].LastHeartbeatTime = metav1.Now()
}
return copy
}
// UpdateNodeStatus updates the status of node.
func UpdateNodeStatus(cs clientset.Interface, node *v1.Node) error {
_, err := cs.CoreV1().Nodes().UpdateStatus(context.TODO(), node, metav1.UpdateOptions{})
return err
}
// InitTestAPIServer initializes a test environment and creates an API server with default
// configuration.
func InitTestAPIServer(t *testing.T, nsPrefix string, admission admission.Interface) *TestContext {
ctx, cancelFunc := context.WithCancel(context.Background())
testCtx := TestContext{
Ctx: ctx,
CancelFn: cancelFunc,
}
testCtx.ClientSet, testCtx.KubeConfig, testCtx.CloseFn = framework.StartTestServer(t, framework.TestServerSetup{
ModifyServerRunOptions: func(options *options.ServerRunOptions) {
options.Admission.GenericAdmission.DisablePlugins = []string{"ServiceAccount", "TaintNodesByCondition", "Priority", "StorageObjectInUseProtection"}
},
ModifyServerConfig: func(config *controlplane.Config) {
if admission != nil {
config.GenericConfig.AdmissionControl = admission
}
},
})
if nsPrefix != "default" {
testCtx.NS = framework.CreateNamespaceOrDie(testCtx.ClientSet, nsPrefix+string(uuid.NewUUID()), t)
} else {
testCtx.NS = framework.CreateNamespaceOrDie(testCtx.ClientSet, "default", t)
}
return &testCtx
}
// WaitForSchedulerCacheCleanup waits for cleanup of scheduler's cache to complete
func WaitForSchedulerCacheCleanup(sched *scheduler.Scheduler, t *testing.T) {
schedulerCacheIsEmpty := func() (bool, error) {
dump := sched.Cache.Dump()
return len(dump.Nodes) == 0 && len(dump.AssumedPods) == 0, nil
}
if err := wait.Poll(time.Second, wait.ForeverTestTimeout, schedulerCacheIsEmpty); err != nil {
t.Errorf("Failed to wait for scheduler cache cleanup: %v", err)
}
}
// InitTestScheduler initializes a test environment and creates a scheduler with default
// configuration.
func InitTestScheduler(
t *testing.T,
testCtx *TestContext,
) *TestContext {
// Pod preemption is enabled by default scheduler configuration.
return InitTestSchedulerWithOptions(t, testCtx, 0)
}
// InitTestSchedulerWithOptions initializes a test environment and creates a scheduler with default
// configuration and other options.
func InitTestSchedulerWithOptions(
t *testing.T,
testCtx *TestContext,
resyncPeriod time.Duration,
opts ...scheduler.Option,
) *TestContext {
// 1. Create scheduler
testCtx.InformerFactory = scheduler.NewInformerFactory(testCtx.ClientSet, resyncPeriod)
if testCtx.KubeConfig != nil {
dynClient := dynamic.NewForConfigOrDie(testCtx.KubeConfig)
testCtx.DynInformerFactory = dynamicinformer.NewFilteredDynamicSharedInformerFactory(dynClient, 0, v1.NamespaceAll, nil)
}
var err error
eventBroadcaster := events.NewBroadcaster(&events.EventSinkImpl{
Interface: testCtx.ClientSet.EventsV1(),
})
opts = append(opts, scheduler.WithKubeConfig(testCtx.KubeConfig))
testCtx.Scheduler, err = scheduler.New(
testCtx.ClientSet,
testCtx.InformerFactory,
testCtx.DynInformerFactory,
profile.NewRecorderFactory(eventBroadcaster),
testCtx.Ctx.Done(),
opts...,
)
if err != nil {
t.Fatalf("Couldn't create scheduler: %v", err)
}
eventBroadcaster.StartRecordingToSink(testCtx.Ctx.Done())
oldCloseFn := testCtx.CloseFn
testCtx.CloseFn = func() {
oldCloseFn()
eventBroadcaster.Shutdown()
}
return testCtx
}
// WaitForPodToScheduleWithTimeout waits for a pod to get scheduled and returns
// an error if it does not scheduled within the given timeout.
func WaitForPodToScheduleWithTimeout(cs clientset.Interface, pod *v1.Pod, timeout time.Duration) error {
return wait.Poll(100*time.Millisecond, timeout, PodScheduled(cs, pod.Namespace, pod.Name))
}
// WaitForPodToSchedule waits for a pod to get scheduled and returns an error if
// it does not get scheduled within the timeout duration (30 seconds).
func WaitForPodToSchedule(cs clientset.Interface, pod *v1.Pod) error {
return WaitForPodToScheduleWithTimeout(cs, pod, 30*time.Second)
}
// PodScheduled checks if the pod has been scheduled
func PodScheduled(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
return func() (bool, error) {
pod, err := c.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
if err != nil {
// This could be a connection error so we want to retry.
return false, nil
}
if pod.Spec.NodeName == "" {
return false, nil
}
return true, nil
}
}
// InitDisruptionController initializes and runs a Disruption Controller to properly
// update PodDisuptionBudget objects.
func InitDisruptionController(t *testing.T, testCtx *TestContext) *disruption.DisruptionController {
informers := informers.NewSharedInformerFactory(testCtx.ClientSet, 12*time.Hour)
discoveryClient := cacheddiscovery.NewMemCacheClient(testCtx.ClientSet.Discovery())
mapper := restmapper.NewDeferredDiscoveryRESTMapper(discoveryClient)
config := restclient.CopyConfig(testCtx.KubeConfig)
scaleKindResolver := scale.NewDiscoveryScaleKindResolver(testCtx.ClientSet.Discovery())
scaleClient, err := scale.NewForConfig(config, mapper, dynamic.LegacyAPIPathResolverFunc, scaleKindResolver)
if err != nil {
t.Fatalf("Error in create scaleClient: %v", err)
}
dc := disruption.NewDisruptionController(
informers.Core().V1().Pods(),
informers.Policy().V1().PodDisruptionBudgets(),
informers.Core().V1().ReplicationControllers(),
informers.Apps().V1().ReplicaSets(),
informers.Apps().V1().Deployments(),
informers.Apps().V1().StatefulSets(),
testCtx.ClientSet,
mapper,
scaleClient,
testCtx.ClientSet.Discovery())
informers.Start(testCtx.Scheduler.StopEverything)
informers.WaitForCacheSync(testCtx.Scheduler.StopEverything)
go dc.Run(testCtx.Ctx)
return dc
}
// InitTestSchedulerWithNS initializes a test environment and creates API server and scheduler with default
// configuration.
func InitTestSchedulerWithNS(t *testing.T, nsPrefix string, opts ...scheduler.Option) *TestContext {
testCtx := InitTestSchedulerWithOptions(t, InitTestAPIServer(t, nsPrefix, nil), 0, opts...)
SyncInformerFactory(testCtx)
go testCtx.Scheduler.Run(testCtx.Ctx)
return testCtx
}
// InitTestDisablePreemption initializes a test environment and creates API server and scheduler with default
// configuration but with pod preemption disabled.
func InitTestDisablePreemption(t *testing.T, nsPrefix string) *TestContext {
cfg := configtesting.V1beta3ToInternalWithDefaults(t, v1beta3.KubeSchedulerConfiguration{
Profiles: []v1beta3.KubeSchedulerProfile{{
SchedulerName: pointer.StringPtr(v1.DefaultSchedulerName),
Plugins: &v1beta3.Plugins{
PostFilter: v1beta3.PluginSet{
Disabled: []v1beta3.Plugin{
{Name: defaultpreemption.Name},
},
},
},
}},
})
testCtx := InitTestSchedulerWithOptions(
t, InitTestAPIServer(t, nsPrefix, nil),
0,
scheduler.WithProfiles(cfg.Profiles...))
SyncInformerFactory(testCtx)
go testCtx.Scheduler.Run(testCtx.Ctx)
return testCtx
}
// WaitForReflection waits till the passFunc confirms that the object it expects
// to see is in the store. Used to observe reflected events.
func WaitForReflection(t *testing.T, nodeLister corelisters.NodeLister, key string,
passFunc func(n interface{}) bool) error {
var nodes []*v1.Node
err := wait.Poll(time.Millisecond*100, wait.ForeverTestTimeout, func() (bool, error) {
n, err := nodeLister.Get(key)
switch {
case err == nil && passFunc(n):
return true, nil
case apierrors.IsNotFound(err):
nodes = append(nodes, nil)
case err != nil:
t.Errorf("Unexpected error: %v", err)
default:
nodes = append(nodes, n)
}
return false, nil
})
if err != nil {
t.Logf("Logging consecutive node versions received from store:")
for i, n := range nodes {
t.Logf("%d: %#v", i, n)
}
}
return err
}
func UpdateNode(cs clientset.Interface, node *v1.Node) (*v1.Node, error) {
return cs.CoreV1().Nodes().Update(context.TODO(), node, metav1.UpdateOptions{})
}
func CreateNode(cs clientset.Interface, node *v1.Node) (*v1.Node, error) {
return cs.CoreV1().Nodes().Create(context.TODO(), node, metav1.CreateOptions{})
}
func createNodes(cs clientset.Interface, prefix string, wrapper *st.NodeWrapper, numNodes int) ([]*v1.Node, error) {
nodes := make([]*v1.Node, numNodes)
for i := 0; i < numNodes; i++ {
nodeName := fmt.Sprintf("%v-%d", prefix, i)
node, err := CreateNode(cs, wrapper.Name(nodeName).Obj())
if err != nil {
return nodes[:], err
}
nodes[i] = node
}
return nodes[:], nil
}
// CreateAndWaitForNodesInCache calls createNodes(), and wait for the created
// nodes to be present in scheduler cache.
func CreateAndWaitForNodesInCache(testCtx *TestContext, prefix string, wrapper *st.NodeWrapper, numNodes int) ([]*v1.Node, error) {
existingNodes := testCtx.Scheduler.Cache.NodeCount()
nodes, err := createNodes(testCtx.ClientSet, prefix, wrapper, numNodes)
if err != nil {
return nodes, fmt.Errorf("cannot create nodes: %v", err)
}
return nodes, WaitForNodesInCache(testCtx.Scheduler, numNodes+existingNodes)
}
// WaitForNodesInCache ensures at least <nodeCount> nodes are present in scheduler cache
// within 30 seconds; otherwise returns false.
func WaitForNodesInCache(sched *scheduler.Scheduler, nodeCount int) error {
err := wait.Poll(100*time.Millisecond, wait.ForeverTestTimeout, func() (bool, error) {
return sched.Cache.NodeCount() >= nodeCount, nil
})
if err != nil {
return fmt.Errorf("cannot obtain available nodes in scheduler cache: %v", err)
}
return nil
}
type PausePodConfig struct {
Name string
Namespace string
Affinity *v1.Affinity
Annotations, Labels, NodeSelector map[string]string
Resources *v1.ResourceRequirements
Tolerations []v1.Toleration
NodeName string
SchedulerName string
Priority *int32
PreemptionPolicy *v1.PreemptionPolicy
PriorityClassName string
}
// InitPausePod initializes a pod API object from the given config. It is used
// mainly in pod creation process.
func InitPausePod(conf *PausePodConfig) *v1.Pod {
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: conf.Name,
Namespace: conf.Namespace,
Labels: conf.Labels,
Annotations: conf.Annotations,
},
Spec: v1.PodSpec{
NodeSelector: conf.NodeSelector,
Affinity: conf.Affinity,
Containers: []v1.Container{
{
Name: conf.Name,
Image: imageutils.GetPauseImageName(),
},
},
Tolerations: conf.Tolerations,
NodeName: conf.NodeName,
SchedulerName: conf.SchedulerName,
Priority: conf.Priority,
PreemptionPolicy: conf.PreemptionPolicy,
PriorityClassName: conf.PriorityClassName,
},
}
if conf.Resources != nil {
pod.Spec.Containers[0].Resources = *conf.Resources
}
return pod
}
// CreatePausePod creates a pod with "Pause" image and the given config and
// return its pointer and error status.
func CreatePausePod(cs clientset.Interface, p *v1.Pod) (*v1.Pod, error) {
return cs.CoreV1().Pods(p.Namespace).Create(context.TODO(), p, metav1.CreateOptions{})
}
// CreatePausePodWithResource creates a pod with "Pause" image and the given
// resources and returns its pointer and error status. The resource list can be
// nil.
func CreatePausePodWithResource(cs clientset.Interface, podName string,
nsName string, res *v1.ResourceList) (*v1.Pod, error) {
var conf PausePodConfig
if res == nil {
conf = PausePodConfig{
Name: podName,
Namespace: nsName,
}
} else {
conf = PausePodConfig{
Name: podName,
Namespace: nsName,
Resources: &v1.ResourceRequirements{
Requests: *res,
},
}
}
return CreatePausePod(cs, InitPausePod(&conf))
}
// RunPausePod creates a pod with "Pause" image and the given config and waits
// until it is scheduled. It returns its pointer and error status.
func RunPausePod(cs clientset.Interface, pod *v1.Pod) (*v1.Pod, error) {
pod, err := cs.CoreV1().Pods(pod.Namespace).Create(context.TODO(), pod, metav1.CreateOptions{})
if err != nil {
return nil, fmt.Errorf("failed to create pause pod: %v", err)
}
if err = WaitForPodToSchedule(cs, pod); err != nil {
return pod, fmt.Errorf("Pod %v/%v didn't schedule successfully. Error: %v", pod.Namespace, pod.Name, err)
}
if pod, err = cs.CoreV1().Pods(pod.Namespace).Get(context.TODO(), pod.Name, metav1.GetOptions{}); err != nil {
return pod, fmt.Errorf("failed to get pod %v/%v info: %v", pod.Namespace, pod.Name, err)
}
return pod, nil
}
type PodWithContainersConfig struct {
Name string
Namespace string
Containers []v1.Container
}
// InitPodWithContainers initializes a pod API object from the given config. This is used primarily for generating
// pods with containers each having a specific image.
func InitPodWithContainers(cs clientset.Interface, conf *PodWithContainersConfig) *v1.Pod {
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: conf.Name,
Namespace: conf.Namespace,
},
Spec: v1.PodSpec{
Containers: conf.Containers,
},
}
return pod
}
// RunPodWithContainers creates a pod with given config and containers and waits
// until it is scheduled. It returns its pointer and error status.
func RunPodWithContainers(cs clientset.Interface, pod *v1.Pod) (*v1.Pod, error) {
pod, err := cs.CoreV1().Pods(pod.Namespace).Create(context.TODO(), pod, metav1.CreateOptions{})
if err != nil {
return nil, fmt.Errorf("failed to create pod-with-containers: %v", err)
}
if err = WaitForPodToSchedule(cs, pod); err != nil {
return pod, fmt.Errorf("Pod %v didn't schedule successfully. Error: %v", pod.Name, err)
}
if pod, err = cs.CoreV1().Pods(pod.Namespace).Get(context.TODO(), pod.Name, metav1.GetOptions{}); err != nil {
return pod, fmt.Errorf("failed to get pod %v info: %v", pod.Name, err)
}
return pod, nil
}
// PodIsGettingEvicted returns true if the pod's deletion timestamp is set.
func PodIsGettingEvicted(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
return func() (bool, error) {
pod, err := c.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
if err != nil {
return false, err
}
if pod.DeletionTimestamp != nil {
return true, nil
}
return false, nil
}
}
// PodScheduledIn returns true if a given pod is placed onto one of the expected nodes.
func PodScheduledIn(c clientset.Interface, podNamespace, podName string, nodeNames []string) wait.ConditionFunc {
return func() (bool, error) {
pod, err := c.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
if err != nil {
// This could be a connection error so we want to retry.
return false, nil
}
if pod.Spec.NodeName == "" {
return false, nil
}
for _, nodeName := range nodeNames {
if pod.Spec.NodeName == nodeName {
return true, nil
}
}
return false, nil
}
}
// PodUnschedulable returns a condition function that returns true if the given pod
// gets unschedulable status.
func PodUnschedulable(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
return func() (bool, error) {
pod, err := c.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
if err != nil {
// This could be a connection error so we want to retry.
return false, nil
}
_, cond := podutil.GetPodCondition(&pod.Status, v1.PodScheduled)
return cond != nil && cond.Status == v1.ConditionFalse &&
cond.Reason == v1.PodReasonUnschedulable && pod.Spec.NodeName == "", nil
}
}
// PodSchedulingError returns a condition function that returns true if the given pod
// gets unschedulable status for reasons other than "Unschedulable". The scheduler
// records such reasons in case of error.
func PodSchedulingError(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
return func() (bool, error) {
pod, err := c.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
if err != nil {
// This could be a connection error so we want to retry.
return false, nil
}
_, cond := podutil.GetPodCondition(&pod.Status, v1.PodScheduled)
return cond != nil && cond.Status == v1.ConditionFalse &&
cond.Reason != v1.PodReasonUnschedulable, nil
}
}
// waitForPodUnscheduleWithTimeout waits for a pod to fail scheduling and returns
// an error if it does not become unschedulable within the given timeout.
func WaitForPodUnschedulableWithTimeout(cs clientset.Interface, pod *v1.Pod, timeout time.Duration) error {
return wait.Poll(100*time.Millisecond, timeout, PodUnschedulable(cs, pod.Namespace, pod.Name))
}
// waitForPodUnschedule waits for a pod to fail scheduling and returns
// an error if it does not become unschedulable within the timeout duration (30 seconds).
func WaitForPodUnschedulable(cs clientset.Interface, pod *v1.Pod) error {
return WaitForPodUnschedulableWithTimeout(cs, pod, 30*time.Second)
}
// WaitForPDBsStable waits for PDBs to have "CurrentHealthy" status equal to
// the expected values.
func WaitForPDBsStable(testCtx *TestContext, pdbs []*policy.PodDisruptionBudget, pdbPodNum []int32) error {
return wait.Poll(time.Second, 60*time.Second, func() (bool, error) {
pdbList, err := testCtx.ClientSet.PolicyV1().PodDisruptionBudgets(testCtx.NS.Name).List(context.TODO(), metav1.ListOptions{})
if err != nil {
return false, err
}
if len(pdbList.Items) != len(pdbs) {
return false, nil
}
for i, pdb := range pdbs {
found := false
for _, cpdb := range pdbList.Items {
if pdb.Name == cpdb.Name && pdb.Namespace == cpdb.Namespace {
found = true
if cpdb.Status.CurrentHealthy != pdbPodNum[i] {
return false, nil
}
}
}
if !found {
return false, nil
}
}
return true, nil
})
}
// WaitCachedPodsStable waits until scheduler cache has the given pods.
func WaitCachedPodsStable(testCtx *TestContext, pods []*v1.Pod) error {
return wait.Poll(time.Second, 30*time.Second, func() (bool, error) {
cachedPods, err := testCtx.Scheduler.Cache.PodCount()
if err != nil {
return false, err
}
if len(pods) != cachedPods {
return false, nil
}
for _, p := range pods {
actualPod, err1 := testCtx.ClientSet.CoreV1().Pods(p.Namespace).Get(context.TODO(), p.Name, metav1.GetOptions{})
if err1 != nil {
return false, err1
}
cachedPod, err2 := testCtx.Scheduler.Cache.GetPod(actualPod)
if err2 != nil || cachedPod == nil {
return false, err2
}
}
return true, nil
})
}
// DeletePod deletes the given pod in the given namespace.
func DeletePod(cs clientset.Interface, podName string, nsName string) error {
return cs.CoreV1().Pods(nsName).Delete(context.TODO(), podName, *metav1.NewDeleteOptions(0))
}
func GetPod(cs clientset.Interface, podName string, podNamespace string) (*v1.Pod, error) {
return cs.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
}
func CreateNamespacesWithLabels(cs clientset.Interface, namespaces []string, labels map[string]string) error {
for _, n := range namespaces {
ns := v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: n, Labels: labels}}
if _, err := cs.CoreV1().Namespaces().Create(context.TODO(), &ns, metav1.CreateOptions{}); err != nil {
return err
}
}
return nil
}
// timeout returns a timeout error if the given `f` function doesn't
// complete within `d` duration; otherwise it returns nil.
func timeout(ctx context.Context, d time.Duration, f func()) error {
ctx, cancel := context.WithTimeout(ctx, d)
defer cancel()
done := make(chan struct{})
go func() {
f()
done <- struct{}{}
}()
select {
case <-done:
return nil
case <-ctx.Done():
return ctx.Err()
}
}
// NextPodOrDie returns the next Pod in the scheduler queue.
// The operation needs to be completed within 5 seconds; otherwise the test gets aborted.
func NextPodOrDie(t *testing.T, testCtx *TestContext) *schedulerframework.QueuedPodInfo {
t.Helper()
var podInfo *schedulerframework.QueuedPodInfo
// NextPod() is a blocking operation. Wrap it in timeout() to avoid relying on
// default go testing timeout (10m) to abort.
if err := timeout(testCtx.Ctx, time.Second*5, func() {
podInfo = testCtx.Scheduler.NextPod()
}); err != nil {
t.Fatalf("Timed out waiting for the Pod to be popped: %v", err)
}
return podInfo
}
// NextPod returns the next Pod in the scheduler queue, with a 5 seconds timeout.
func NextPod(t *testing.T, testCtx *TestContext) *schedulerframework.QueuedPodInfo {
t.Helper()
var podInfo *schedulerframework.QueuedPodInfo
// NextPod() is a blocking operation. Wrap it in timeout() to avoid relying on
// default go testing timeout (10m) to abort.
if err := timeout(testCtx.Ctx, time.Second*5, func() {
podInfo = testCtx.Scheduler.NextPod()
}); err != nil {
return nil
}
return podInfo
}