pod_gc.go

Documentation: k8s.io/kubernetes/test/e2e/node

     1  /*
     2  Copyright 2015 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package node
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  	"time"
    23  
    24  	"github.com/onsi/ginkgo/v2"
    25  
    26  	v1 "k8s.io/api/core/v1"
    27  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    28  	"k8s.io/apimachinery/pkg/util/uuid"
    29  	"k8s.io/apimachinery/pkg/util/wait"
    30  
    31  	"k8s.io/kubernetes/test/e2e/feature"
    32  	"k8s.io/kubernetes/test/e2e/framework"
    33  	imageutils "k8s.io/kubernetes/test/utils/image"
    34  	admissionapi "k8s.io/pod-security-admission/api"
    35  )
    36  
    37  // This test requires that --terminated-pod-gc-threshold=100 be set on the controller manager
    38  //
    39  // Slow by design (7 min)
    40  var _ = SIGDescribe("Pod garbage collector", feature.PodGarbageCollector, framework.WithSlow(), func() {
    41  	f := framework.NewDefaultFramework("pod-garbage-collector")
    42  	f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
    43  	ginkgo.It("should handle the creation of 1000 pods", func(ctx context.Context) {
    44  		var count int
    45  		for count < 1000 {
    46  			pod, err := createTerminatingPod(ctx, f)
    47  			if err != nil {
    48  				framework.Failf("err creating pod: %v", err)
    49  			}
    50  			pod.ResourceVersion = ""
    51  			pod.Status.Phase = v1.PodFailed
    52  			_, err = f.ClientSet.CoreV1().Pods(f.Namespace.Name).UpdateStatus(ctx, pod, metav1.UpdateOptions{})
    53  			if err != nil {
    54  				framework.Failf("err failing pod: %v", err)
    55  			}
    56  
    57  			count++
    58  			if count%50 == 0 {
    59  				framework.Logf("count: %v", count)
    60  			}
    61  		}
    62  
    63  		framework.Logf("created: %v", count)
    64  
    65  		// The gc controller polls every 30s and fires off a goroutine per
    66  		// pod to terminate.
    67  		var err error
    68  		var pods *v1.PodList
    69  		timeout := 2 * time.Minute
    70  		gcThreshold := 100
    71  
    72  		ginkgo.By(fmt.Sprintf("Waiting for gc controller to gc all but %d pods", gcThreshold))
    73  		pollErr := wait.Poll(1*time.Minute, timeout, func() (bool, error) {
    74  			pods, err = f.ClientSet.CoreV1().Pods(f.Namespace.Name).List(ctx, metav1.ListOptions{})
    75  			if err != nil {
    76  				framework.Logf("Failed to list pod %v", err)
    77  				return false, nil
    78  			}
    79  			if len(pods.Items) != gcThreshold {
    80  				framework.Logf("Number of observed pods %v, waiting for %v", len(pods.Items), gcThreshold)
    81  				return false, nil
    82  			}
    83  			return true, nil
    84  		})
    85  		if pollErr != nil {
    86  			framework.Failf("Failed to GC pods within %v, %v pods remaining, error: %v", timeout, len(pods.Items), err)
    87  		}
    88  	})
    89  })
    90  
    91  func createTerminatingPod(ctx context.Context, f *framework.Framework) (*v1.Pod, error) {
    92  	uuid := uuid.NewUUID()
    93  	pod := &v1.Pod{
    94  		ObjectMeta: metav1.ObjectMeta{
    95  			Name: string(uuid),
    96  		},
    97  		Spec: v1.PodSpec{
    98  			Containers: []v1.Container{
    99  				{
   100  					Name:  string(uuid),
   101  					Image: imageutils.GetE2EImage(imageutils.BusyBox),
   102  				},
   103  			},
   104  			SchedulerName: "please don't schedule my pods",
   105  		},
   106  	}
   107  	return f.ClientSet.CoreV1().Pods(f.Namespace.Name).Create(ctx, pod, metav1.CreateOptions{})
   108  }
   109
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