/
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 shoot
import (
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/util/workqueue"
"k8s.io/utils/clock"
"k8s.io/utils/pointer"
"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/handler"
"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"
predicateutils "github.com/gardener/gardener/pkg/controllerutils/predicate"
"github.com/gardener/gardener/pkg/gardenlet/controller/shoot/shoot/helper"
gardenerutils "github.com/gardener/gardener/pkg/utils/gardener"
)
// ControllerName is the name of this controller.
const ControllerName = "shoot"
// AddToManager adds Reconciler to the given manager.
func (r *Reconciler) AddToManager(mgr manager.Manager, gardenCluster cluster.Cluster) error {
if r.GardenClient == nil {
r.GardenClient = gardenCluster.GetClient()
}
if r.Recorder == nil {
r.Recorder = gardenCluster.GetEventRecorderFor(ControllerName + "-controller")
}
if r.Clock == nil {
r.Clock = clock.RealClock{}
}
// It's not possible to call builder.Build() without adding atleast one watch, and without this, we can't get the controller logger.
// Hence, we have to build up the controller manually.
c, err := controller.New(
ControllerName,
mgr,
controller.Options{
Reconciler: r,
MaxConcurrentReconciles: pointer.IntDeref(r.Config.Controllers.Shoot.ConcurrentSyncs, 0),
},
)
if err != nil {
return err
}
return c.Watch(
source.NewKindWithCache(&gardencorev1beta1.Shoot{}, gardenCluster.GetCache()),
r.EventHandler(c.GetLogger()),
predicateutils.SeedNamePredicate(r.Config.SeedConfig.Name, gardenerutils.GetShootSeedNames),
&predicate.GenerationChangedPredicate{},
)
}
// CalculateControllerInfos is exposed for testing
var CalculateControllerInfos = helper.CalculateControllerInfos
// EventHandler returns an event handler.
func (r *Reconciler) EventHandler(log logr.Logger) handler.EventHandler {
return &handler.Funcs{
CreateFunc: func(e event.CreateEvent, q workqueue.RateLimitingInterface) {
shoot, ok := e.Object.(*gardencorev1beta1.Shoot)
if !ok {
return
}
enqueueAfter := CalculateControllerInfos(shoot, r.Clock, *r.Config.Controllers.Shoot).EnqueueAfter
nextReconciliation := r.Clock.Now().UTC().Add(enqueueAfter)
log.Info("Scheduling next reconciliation for Shoot",
"namespace", shoot.Namespace, "name", shoot.Name,
"enqueueAfter", enqueueAfter, "nextReconciliation", nextReconciliation)
q.AddAfter(reconcile.Request{NamespacedName: types.NamespacedName{
Name: e.Object.GetName(),
Namespace: e.Object.GetNamespace(),
}}, enqueueAfter)
},
UpdateFunc: func(e event.UpdateEvent, q workqueue.RateLimitingInterface) {
req := reconcile.Request{NamespacedName: types.NamespacedName{
Name: e.ObjectNew.GetName(),
Namespace: e.ObjectNew.GetNamespace(),
}}
// If the shoot's deletion timestamp is set then we want to forget about the potentially established exponential
// backoff and enqueue it faster.
if e.ObjectOld.GetDeletionTimestamp() == nil && e.ObjectNew.GetDeletionTimestamp() != nil {
q.Forget(req)
}
q.Add(req)
},
}
}