-
Notifications
You must be signed in to change notification settings - Fork 465
/
waiter.go
95 lines (81 loc) · 4.06 KB
/
waiter.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
// Copyright (c) 2020 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 kubecontrollermanager
import (
"context"
"fmt"
"time"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
"github.com/gardener/gardener/pkg/utils/retry"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/tools/leaderelection/resourcelock"
"sigs.k8s.io/controller-runtime/pkg/client"
)
func (k *kubeControllerManager) Wait(_ context.Context) error { return nil }
func (k *kubeControllerManager) WaitCleanup(_ context.Context) error { return nil }
func (k *kubeControllerManager) WaitForControllerToBeActive(ctx context.Context) error {
const (
pollInterval = 5 * time.Second
pollTimeout = 90 * time.Second
)
// Check whether the kube-controller-manager deployment exists
if err := k.seedClient.Get(ctx, kutil.Key(k.namespace, v1beta1constants.DeploymentNameKubeControllerManager), &appsv1.Deployment{}); err != nil {
if apierrors.IsNotFound(err) {
return fmt.Errorf("kube controller manager deployment not found: %v", err)
}
return err
}
return retry.UntilTimeout(ctx, pollInterval, pollTimeout, func(ctx context.Context) (done bool, err error) {
podList := &corev1.PodList{}
err = k.seedClient.List(ctx, podList,
client.InNamespace(k.namespace),
client.MatchingLabels(map[string]string{
v1beta1constants.LabelApp: v1beta1constants.LabelKubernetes,
v1beta1constants.LabelRole: LabelRole,
}))
if err != nil {
return retry.SevereError(fmt.Errorf("could not check whether controller %s is active: %w", v1beta1constants.DeploymentNameKubeControllerManager, err))
}
// Check that one replica of the controller exists.
if len(podList.Items) != 1 {
k.log.Infof("Waiting for %s to have exactly one replica", v1beta1constants.DeploymentNameKubeControllerManager)
return retry.MinorError(fmt.Errorf("controller %s is not active", v1beta1constants.DeploymentNameKubeControllerManager))
}
// Check that the existing replica is not getting deleted.
if podList.Items[0].DeletionTimestamp != nil {
k.log.Infof("Waiting for a new replica of %s", v1beta1constants.DeploymentNameKubeControllerManager)
return retry.MinorError(fmt.Errorf("controller %s is not active", v1beta1constants.DeploymentNameKubeControllerManager))
}
// Check if the controller is active by reading its leader election record.
lock := resourcelock.EndpointsResourceLock
if versionConstraintK8sGreaterEqual120.Check(k.version) {
lock = resourcelock.LeasesResourceLock
}
leaderElectionRecord, err := kutil.ReadLeaderElectionRecord(ctx, k.shootClient, lock, metav1.NamespaceSystem, v1beta1constants.DeploymentNameKubeControllerManager)
if err != nil {
return retry.SevereError(fmt.Errorf("could not check whether controller %s is active: %w", v1beta1constants.DeploymentNameKubeControllerManager, err))
}
lastRenew := metav1.Now().UTC().Sub(leaderElectionRecord.RenewTime.Time.UTC())
defaultRenewalTime := 2 * time.Second
if lastRenew <= defaultRenewalTime*2 {
return retry.Ok()
}
k.log.Infof("Waiting for %s to be active", v1beta1constants.DeploymentNameKubeControllerManager)
return retry.MinorError(fmt.Errorf("controller %s is not active", v1beta1constants.DeploymentNameKubeControllerManager))
})
}