/
dependency_watchdog.go
102 lines (96 loc) · 3.42 KB
/
dependency_watchdog.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
// Copyright 2021 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 apiserver
import (
"time"
proberapi "github.com/gardener/dependency-watchdog/api/prober"
weederapi "github.com/gardener/dependency-watchdog/api/weeder"
appsv1 "k8s.io/api/apps/v1"
autoscalingv1 "k8s.io/api/autoscaling/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
)
// NewDependencyWatchdogWeederConfiguration returns the configuration for the dependency watchdog (weeder role)
// ensuring that its dependant pods are restarted as soon as it recovers from a crash loop.
func NewDependencyWatchdogWeederConfiguration() (map[string]weederapi.DependantSelectors, error) {
return map[string]weederapi.DependantSelectors{
v1beta1constants.DeploymentNameKubeAPIServer: {
PodSelectors: []*metav1.LabelSelector{
{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Key: v1beta1constants.GardenRole,
Operator: metav1.LabelSelectorOpIn,
Values: []string{v1beta1constants.GardenRoleControlPlane},
},
{
Key: v1beta1constants.LabelRole,
Operator: metav1.LabelSelectorOpNotIn,
Values: []string{v1beta1constants.ETCDRoleMain, v1beta1constants.LabelAPIServer},
},
},
},
},
},
}, nil
}
// NewDependencyWatchdogProberConfiguration returns the configuration for the dependency watchdog (probe role)
// ensuring that its dependant pods are scaled as soon a prober fails.
func NewDependencyWatchdogProberConfiguration() ([]proberapi.DependentResourceInfo, error) {
return []proberapi.DependentResourceInfo{
{
Ref: &autoscalingv1.CrossVersionObjectReference{
Kind: "Deployment",
Name: v1beta1constants.DeploymentNameKubeControllerManager,
APIVersion: appsv1.SchemeGroupVersion.String(),
},
Optional: false,
ScaleUpInfo: &proberapi.ScaleInfo{
Level: 0,
},
ScaleDownInfo: &proberapi.ScaleInfo{
Level: 1,
},
},
{
Ref: &autoscalingv1.CrossVersionObjectReference{
Kind: "Deployment",
Name: v1beta1constants.DeploymentNameMachineControllerManager,
APIVersion: appsv1.SchemeGroupVersion.String(),
},
Optional: false,
ScaleUpInfo: &proberapi.ScaleInfo{
Level: 1,
InitialDelay: &metav1.Duration{Duration: 30 * time.Second},
},
ScaleDownInfo: &proberapi.ScaleInfo{
Level: 0,
},
},
{
Ref: &autoscalingv1.CrossVersionObjectReference{
Kind: "Deployment",
Name: v1beta1constants.DeploymentNameClusterAutoscaler,
APIVersion: appsv1.SchemeGroupVersion.String(),
},
Optional: true,
ScaleUpInfo: &proberapi.ScaleInfo{
Level: 2,
},
ScaleDownInfo: &proberapi.ScaleInfo{
Level: 0,
},
},
}, nil
}