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add.go
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add.go
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// Copyright (c) 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 reference
import (
apiequality "k8s.io/apimachinery/pkg/api/equality"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
)
// ControllerName is the name of this controller.
const ControllerName = "shoot-reference"
// AddToManager adds Reconciler to the given manager.
func (r *Reconciler) AddToManager(mgr manager.Manager) error {
if r.Client == nil {
r.Client = mgr.GetClient()
}
return builder.
ControllerManagedBy(mgr).
Named(ControllerName).
For(&gardencorev1beta1.Shoot{}, builder.WithPredicates(r.ShootPredicate())).
WithOptions(controller.Options{
MaxConcurrentReconciles: pointer.IntDeref(r.Config.ConcurrentSyncs, 0),
}).
Complete(r)
}
// ShootPredicate reacts on CREATE and on UPDATE events.
func (r *Reconciler) ShootPredicate() predicate.Predicate {
return predicate.Funcs{
CreateFunc: func(e event.CreateEvent) bool {
return true
},
UpdateFunc: func(e event.UpdateEvent) bool {
shoot, ok := e.ObjectNew.(*gardencorev1beta1.Shoot)
if !ok {
return false
}
oldShoot, ok := e.ObjectOld.(*gardencorev1beta1.Shoot)
if !ok {
return false
}
return refChange(oldShoot, shoot) ||
shoot.DeletionTimestamp != nil &&
!controllerutil.ContainsFinalizer(shoot, gardencorev1beta1.GardenerName)
},
DeleteFunc: func(e event.DeleteEvent) bool { return false },
GenericFunc: func(e event.GenericEvent) bool { return false },
}
}
func refChange(oldShoot, newShoot *gardencorev1beta1.Shoot) bool {
return shootDNSFieldChanged(oldShoot, newShoot) || shootKubeAPIServerAuditConfigFieldChanged(oldShoot, newShoot)
}
func shootDNSFieldChanged(oldShoot, newShoot *gardencorev1beta1.Shoot) bool {
return !apiequality.Semantic.Equalities.DeepEqual(oldShoot.Spec.DNS, newShoot.Spec.DNS)
}
func shootKubeAPIServerAuditConfigFieldChanged(oldShoot, newShoot *gardencorev1beta1.Shoot) bool {
return !apiequality.Semantic.Equalities.DeepEqual(oldShoot.Spec.Kubernetes.KubeAPIServer.AuditConfig, newShoot.Spec.Kubernetes.KubeAPIServer.AuditConfig)
}