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actuator.go
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/
actuator.go
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// Copyright 2022 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 shoot
import (
"context"
"time"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/gardener/gardener/extensions/pkg/controller/extension"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
kubernetesclient "github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/utils/managedresources"
)
const (
// ApplicationName is the name of the application.
ApplicationName string = "local-ext-shoot"
// ManagedResourceNamesShoot is the name used to describe the managed shoot resources.
ManagedResourceNamesShoot string = ApplicationName
)
type actuator struct {
client client.Client
}
// NewActuator returns an actuator responsible for Extension resources.
func NewActuator() extension.Actuator {
return &actuator{}
}
// InjectClient injects the controller runtime client into the reconciler.
func (a *actuator) InjectClient(client client.Client) error {
a.client = client
return nil
}
// Reconcile the extension resource.
func (a *actuator) Reconcile(ctx context.Context, log logr.Logger, ex *extensionsv1alpha1.Extension) error {
namespace := ex.Namespace
shootResources, err := getShootResources()
if err != nil {
return err
}
var (
injectedLabels = map[string]string{v1beta1constants.ShootNoCleanup: "true"}
secretNameWithPrefix = true
keepObjects = false
)
return managedresources.Create(
ctx,
a.client,
namespace,
ManagedResourceNamesShoot,
map[string]string{},
secretNameWithPrefix,
"",
shootResources,
&keepObjects,
injectedLabels,
nil,
)
}
// Delete the extension resource.
func (a *actuator) Delete(ctx context.Context, log logr.Logger, ex *extensionsv1alpha1.Extension) error {
namespace := ex.GetNamespace()
twoMinutes := 2 * time.Minute
timeoutShootCtx, cancelShootCtx := context.WithTimeout(ctx, twoMinutes)
defer cancelShootCtx()
if err := managedresources.DeleteForShoot(ctx, a.client, namespace, ManagedResourceNamesShoot); err != nil {
return err
}
return managedresources.WaitUntilDeleted(timeoutShootCtx, a.client, namespace, ManagedResourceNamesShoot)
}
// Migrate the extension resource.
func (a *actuator) Migrate(ctx context.Context, log logr.Logger, ex *extensionsv1alpha1.Extension) error {
// Keep objects for shoot managed resources so that they are not deleted from the shoot during the migration
if err := managedresources.SetKeepObjects(ctx, a.client, ex.GetNamespace(), ManagedResourceNamesShoot, true); err != nil {
return err
}
return a.Delete(ctx, log, ex)
}
// Restore the extension resource.
func (a *actuator) Restore(ctx context.Context, log logr.Logger, ex *extensionsv1alpha1.Extension) error {
return a.Reconcile(ctx, log, ex)
}
func getLabels() map[string]string {
return map[string]string{
"app.kubernetes.io/name": ApplicationName,
}
}
func getShootResources() (map[string][]byte, error) {
shootRegistry := managedresources.NewRegistry(kubernetesclient.ShootScheme, kubernetesclient.ShootCodec, kubernetesclient.ShootSerializer)
return shootRegistry.AddAllAndSerialize(
&corev1.ServiceAccount{
ObjectMeta: metav1.ObjectMeta{
Name: ApplicationName,
Namespace: metav1.NamespaceSystem,
Labels: getLabels(),
},
AutomountServiceAccountToken: pointer.Bool(false),
},
)
}