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add.go
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add.go
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// Copyright (c) 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 tokenrequestor
import (
"fmt"
corev1 "k8s.io/api/core/v1"
corev1clientset "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/cluster"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
)
// ControllerName is the name of the controller.
const ControllerName = "token-requestor"
// AddToManager adds Reconciler to the given manager.
func (r *Reconciler) AddToManager(mgr manager.Manager, sourceCluster, targetCluster cluster.Cluster) error {
if r.SourceClient == nil {
r.SourceClient = sourceCluster.GetClient()
}
if r.TargetClient == nil {
r.TargetClient = targetCluster.GetClient()
}
if r.TargetCoreV1Client == nil {
var err error
r.TargetCoreV1Client, err = corev1clientset.NewForConfig(targetCluster.GetConfig())
if err != nil {
return fmt.Errorf("could not create coreV1Client: %w", err)
}
}
return builder.
ControllerManagedBy(mgr).
Named(ControllerName).
For(&corev1.Secret{}, builder.WithPredicates(r.SecretPredicate())).
WithOptions(controller.Options{
MaxConcurrentReconciles: pointer.IntDeref(r.Config.ConcurrentSyncs, 0),
RecoverPanic: true,
}).
Complete(r)
}
// SecretPredicate is the predicate for secrets.
func (r *Reconciler) SecretPredicate() predicate.Predicate {
return predicate.Funcs{
CreateFunc: func(e event.CreateEvent) bool { return isRelevantSecret(e.Object) },
UpdateFunc: func(e event.UpdateEvent) bool { return isRelevantSecretUpdate(e.ObjectOld, e.ObjectNew) },
DeleteFunc: func(e event.DeleteEvent) bool { return isRelevantSecret(e.Object) },
GenericFunc: func(e event.GenericEvent) bool { return false },
}
}
func isRelevantSecret(obj client.Object) bool {
secret, ok := obj.(*corev1.Secret)
if !ok {
return false
}
return secret.Labels != nil && secret.Labels[resourcesv1alpha1.ResourceManagerPurpose] == resourcesv1alpha1.LabelPurposeTokenRequest
}
func isRelevantSecretUpdate(oldObj, newObj client.Object) bool {
return isRelevantSecret(newObj) || (isRelevantSecret(oldObj) && !isRelevantSecret(newObj))
}