gc_controller_test.go

Documentation: k8s.io/kubernetes/pkg/controlplane/controller/apiserverleasegc

     1  /*
     2  Copyright 2022 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 apiserverleasegc
    18  
    19  import (
    20  	"context"
    21  	"testing"
    22  	"time"
    23  
    24  	coordinationv1 "k8s.io/api/coordination/v1"
    25  	apierrors "k8s.io/apimachinery/pkg/api/errors"
    26  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    27  	"k8s.io/client-go/kubernetes/fake"
    28  	testingclock "k8s.io/utils/clock/testing"
    29  	"k8s.io/utils/pointer"
    30  )
    31  
    32  // Test_Controller validates the garbage collection logic for the apiserverleasegc controller.
    33  func Test_Controller(t *testing.T) {
    34  	fakeClock := testingclock.NewFakeClock(time.Now())
    35  	tests := []struct {
    36  		name          string
    37  		lease         *coordinationv1.Lease
    38  		expectDeleted bool
    39  	}{
    40  		{
    41  			name: "lease not expired",
    42  			lease: &coordinationv1.Lease{
    43  				ObjectMeta: metav1.ObjectMeta{
    44  					Name:      "kube-apiserver-12345",
    45  					Namespace: metav1.NamespaceSystem,
    46  					Labels: map[string]string{
    47  						"apiserver.kubernetes.io/identity": "kube-apiserver",
    48  					},
    49  				},
    50  				Spec: coordinationv1.LeaseSpec{
    51  					HolderIdentity:       pointer.StringPtr("kube-apiserver-12345"),
    52  					LeaseDurationSeconds: pointer.Int32Ptr(10),
    53  					RenewTime:            &metav1.MicroTime{Time: fakeClock.Now()},
    54  				},
    55  			},
    56  			expectDeleted: false,
    57  		},
    58  		{
    59  			name: "expired lease but with a different component label",
    60  			lease: &coordinationv1.Lease{
    61  				ObjectMeta: metav1.ObjectMeta{
    62  					Name:      "kube-apiserver-12345",
    63  					Namespace: metav1.NamespaceSystem,
    64  					Labels: map[string]string{
    65  						"apiserver.kubernetes.io/identity": "kube-controller-manager",
    66  					},
    67  				},
    68  				Spec: coordinationv1.LeaseSpec{
    69  					HolderIdentity:       pointer.StringPtr("kube-apiserver-12345"),
    70  					LeaseDurationSeconds: pointer.Int32Ptr(10),
    71  					RenewTime:            &metav1.MicroTime{Time: fakeClock.Now().Add(-time.Minute)},
    72  				},
    73  			},
    74  			expectDeleted: false,
    75  		},
    76  		{
    77  			name: "lease expired due to expired renew time",
    78  			lease: &coordinationv1.Lease{
    79  				ObjectMeta: metav1.ObjectMeta{
    80  					Name:      "kube-apiserver-12345",
    81  					Namespace: metav1.NamespaceSystem,
    82  					Labels: map[string]string{
    83  						"apiserver.kubernetes.io/identity": "kube-apiserver",
    84  					},
    85  				},
    86  				Spec: coordinationv1.LeaseSpec{
    87  					HolderIdentity:       pointer.StringPtr("kube-apiserver-12345"),
    88  					LeaseDurationSeconds: pointer.Int32Ptr(10),
    89  					RenewTime:            &metav1.MicroTime{Time: fakeClock.Now().Add(-time.Minute)},
    90  				},
    91  			},
    92  			expectDeleted: true,
    93  		},
    94  		{
    95  			name: "lease expired due to nil renew time",
    96  			lease: &coordinationv1.Lease{
    97  				ObjectMeta: metav1.ObjectMeta{
    98  					Name:      "kube-apiserver-12345",
    99  					Namespace: metav1.NamespaceSystem,
   100  					Labels: map[string]string{
   101  						"apiserver.kubernetes.io/identity": "kube-apiserver",
   102  					},
   103  				},
   104  				Spec: coordinationv1.LeaseSpec{
   105  					HolderIdentity:       pointer.StringPtr("kube-apiserver-12345"),
   106  					LeaseDurationSeconds: pointer.Int32Ptr(10),
   107  					RenewTime:            nil,
   108  				},
   109  			},
   110  			expectDeleted: true,
   111  		},
   112  		{
   113  			name: "lease expired due to nil lease duration seconds",
   114  			lease: &coordinationv1.Lease{
   115  				ObjectMeta: metav1.ObjectMeta{
   116  					Name:      "kube-apiserver-12345",
   117  					Namespace: metav1.NamespaceSystem,
   118  					Labels: map[string]string{
   119  						"apiserver.kubernetes.io/identity": "kube-apiserver",
   120  					},
   121  				},
   122  				Spec: coordinationv1.LeaseSpec{
   123  					HolderIdentity:       pointer.StringPtr("kube-apiserver-12345"),
   124  					LeaseDurationSeconds: nil,
   125  					RenewTime:            &metav1.MicroTime{Time: fakeClock.Now().Add(-time.Minute)},
   126  				},
   127  			},
   128  			expectDeleted: true,
   129  		},
   130  	}
   131  
   132  	for _, test := range tests {
   133  		t.Run(test.name, func(t *testing.T) {
   134  			clientset := fake.NewSimpleClientset(test.lease)
   135  			controller := NewAPIServerLeaseGC(clientset, 100*time.Millisecond, metav1.NamespaceSystem, "apiserver.kubernetes.io/identity=kube-apiserver")
   136  			go controller.Run(nil)
   137  
   138  			time.Sleep(time.Second)
   139  
   140  			_, err := clientset.CoordinationV1().Leases(test.lease.Namespace).Get(context.TODO(), test.lease.Name, metav1.GetOptions{})
   141  			if err != nil && !apierrors.IsNotFound(err) {
   142  				t.Errorf("unexpected error %v", err)
   143  			}
   144  
   145  			if apierrors.IsNotFound(err) && !test.expectDeleted {
   146  				t.Errorf("lease was not deleted")
   147  			}
   148  
   149  			if err == nil && test.expectDeleted {
   150  				t.Error("lease was not deleted")
   151  			}
   152  		})
   153  	}
   154  }
   155
View as plain text