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dependency_watchdog.go
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dependency_watchdog.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
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
}