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add.go
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add.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 bastion
import (
"context"
"github.com/go-logr/logr"
apiequality "k8s.io/apimachinery/pkg/api/equality"
"k8s.io/utils/clock"
"k8s.io/utils/ptr"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/client"
"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"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
"github.com/gardener/gardener/pkg/apis/operations"
operationsv1alpha1 "github.com/gardener/gardener/pkg/apis/operations/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils/mapper"
predicateutils "github.com/gardener/gardener/pkg/controllerutils/predicate"
)
// ControllerName is the name of this controller.
const ControllerName = "bastion"
// AddToManager adds Reconciler to the given manager.
func (r *Reconciler) AddToManager(ctx context.Context, mgr manager.Manager) error {
if r.Client == nil {
r.Client = mgr.GetClient()
}
if r.Clock == nil {
r.Clock = clock.RealClock{}
}
c, err := builder.
ControllerManagedBy(mgr).
Named(ControllerName).
For(&operationsv1alpha1.Bastion{}, builder.WithPredicates(predicate.GenerationChangedPredicate{})).
WithOptions(controller.Options{
MaxConcurrentReconciles: ptr.Deref(r.Config.ConcurrentSyncs, 0),
}).
Build(r)
if err != nil {
return err
}
return c.Watch(
source.Kind(mgr.GetCache(), &gardencorev1beta1.Shoot{}),
mapper.EnqueueRequestsFrom(ctx, mgr.GetCache(), mapper.MapFunc(r.MapShootToBastions), mapper.UpdateWithNew, c.GetLogger()),
r.ShootPredicate(),
)
}
// ShootPredicate returns the predicate for Shoot events.
func (r *Reconciler) ShootPredicate() predicate.Predicate {
return predicate.Or(
predicateutils.IsDeleting(),
predicate.Funcs{
CreateFunc: func(_ event.CreateEvent) bool { return false },
DeleteFunc: func(_ event.DeleteEvent) bool { return false },
GenericFunc: func(_ event.GenericEvent) bool { return false },
UpdateFunc: func(e event.UpdateEvent) bool {
oldShoot, ok := e.ObjectOld.(*gardencorev1beta1.Shoot)
if !ok {
return false
}
newShoot, ok := e.ObjectNew.(*gardencorev1beta1.Shoot)
if !ok {
return false
}
if oldShoot.Spec.SeedName == nil {
return false
}
return !apiequality.Semantic.DeepEqual(oldShoot.Spec.SeedName, newShoot.Spec.SeedName)
},
},
)
}
// MapShootToBastions is a mapper.MapFunc for mapping shoots to referencing Bastions.
func (r *Reconciler) MapShootToBastions(ctx context.Context, log logr.Logger, reader client.Reader, obj client.Object) []reconcile.Request {
shoot, ok := obj.(*gardencorev1beta1.Shoot)
if !ok {
return nil
}
bastionList := &operationsv1alpha1.BastionList{}
if err := reader.List(ctx, bastionList, client.InNamespace(shoot.Namespace), client.MatchingFields{operations.BastionShootName: shoot.Name}); err != nil {
log.Error(err, "Failed to list Bastions for shoot", "shoot", client.ObjectKeyFromObject(shoot))
return nil
}
return mapper.ObjectListToRequests(bastionList)
}