-
Notifications
You must be signed in to change notification settings - Fork 451
/
garbage_collection.go
129 lines (106 loc) · 4.22 KB
/
garbage_collection.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 botanist
import (
"context"
"strings"
"github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/operation/common"
"github.com/gardener/gardener/pkg/utils/kubernetes/health"
"github.com/gardener/gardener/pkg/utils/version"
"github.com/hashicorp/go-multierror"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// PerformGarbageCollectionSeed performs garbage collection in the Shoot namespace in the Seed cluster
func (b *Botanist) PerformGarbageCollectionSeed() error {
ctx := context.TODO()
podList := &corev1.PodList{}
if err := b.K8sSeedClient.Client().List(ctx, podList, client.InNamespace(b.Shoot.SeedNamespace)); err != nil {
return err
}
if err := b.deleteStalePods(b.K8sSeedClient.Client(), podList); err != nil {
return err
}
return nil
}
// PerformGarbageCollectionShoot performs garbage collection in the kube-system namespace in the Shoot
// cluster, i.e., it deletes evicted pods (mitigation for https://github.com/kubernetes/kubernetes/issues/55051).
func (b *Botanist) PerformGarbageCollectionShoot() error {
// Workaround for https://github.com/kubernetes/kubernetes/pull/72507.
if err := b.removeStaleOutOfDiskNodeCondition(); err != nil {
return err
}
namespace := metav1.NamespaceSystem
if b.Shoot.Info.DeletionTimestamp != nil {
namespace = metav1.NamespaceAll
}
podList := &corev1.PodList{}
if err := b.K8sShootClient.Client().List(context.TODO(), podList, client.InNamespace(namespace)); err != nil {
return err
}
return b.deleteStalePods(b.K8sShootClient.Client(), podList)
}
func (b *Botanist) deleteStalePods(k8sClient client.Client, podList *corev1.PodList) error {
var result error
for _, pod := range podList.Items {
if strings.Contains(pod.Status.Reason, "Evicted") {
b.Logger.Debugf("Deleting pod %s as its reason is %s.", pod.Name, pod.Status.Reason)
if err := k8sClient.Delete(context.TODO(), &pod, kubernetes.DefaultDeleteOptions...); client.IgnoreNotFound(err) != nil {
result = multierror.Append(result, err)
}
continue
}
if common.ShouldObjectBeRemoved(&pod, common.GardenerDeletionGracePeriod) {
b.Logger.Debugf("Deleting stuck terminating pod %q", pod.Name)
if err := k8sClient.Delete(context.TODO(), &pod, kubernetes.ForceDeleteOptions...); client.IgnoreNotFound(err) != nil {
result = multierror.Append(result, err)
}
}
}
return result
}
func (b *Botanist) removeStaleOutOfDiskNodeCondition() error {
// This code is limited to 1.13.0-1.13.3 (1.13.4 contains the Kubernetes fix).
// For more details see https://github.com/kubernetes/kubernetes/pull/73394.
needsRemovalOfStaleCondition, err := version.CheckVersionMeetsConstraint(b.Shoot.Info.Spec.Kubernetes.Version, ">= 1.13.0, <= 1.13.3")
if err != nil {
return err
}
if !needsRemovalOfStaleCondition {
return nil
}
nodeList := &corev1.NodeList{}
if err := b.K8sShootClient.Client().List(context.TODO(), nodeList); err != nil {
return err
}
var result error
for _, node := range nodeList.Items {
var conditions []corev1.NodeCondition
for _, condition := range node.Status.Conditions {
if condition.Type != health.NodeOutOfDisk {
conditions = append(conditions, condition)
}
}
if len(conditions) == len(node.Status.Conditions) {
continue
}
node.Status.Conditions = conditions
if err := b.K8sShootClient.Client().Status().Update(context.TODO(), &node); err != nil {
result = multierror.Append(result, err)
}
}
return result
}