/
add.go
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/
add.go
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// Copyright 2023 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 care
import (
"context"
"fmt"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/util/workqueue"
"k8s.io/utils/clock"
"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/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"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
operatorv1alpha1 "github.com/gardener/gardener/pkg/apis/operator/v1alpha1"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
clientmapbuilder "github.com/gardener/gardener/pkg/client/kubernetes/clientmap/builder"
"github.com/gardener/gardener/pkg/controllerutils/mapper"
predicateutils "github.com/gardener/gardener/pkg/controllerutils/predicate"
)
// ControllerName is the name of this controller.
const ControllerName = "garden-care"
// AddToManager adds Reconciler to the given manager.
func (r *Reconciler) AddToManager(ctx context.Context, mgr manager.Manager) error {
if r.RuntimeClient == nil {
r.RuntimeClient = mgr.GetClient()
}
if r.Clock == nil {
r.Clock = clock.RealClock{}
}
if r.GardenNamespace == "" {
r.GardenNamespace = v1beta1constants.GardenNamespace
}
if r.GardenClientMap == nil {
var err error
r.GardenClientMap, err = clientmapbuilder.
NewGardenClientMapBuilder().
WithRuntimeClient(mgr.GetClient()).
WithClientConnectionConfig(&r.Config.VirtualClientConnection).
WithGardenNamespace(r.GardenNamespace).
Build(mgr.GetLogger())
if err != nil {
return fmt.Errorf("failed to build garden ClientMap: %w", err)
}
if err := mgr.Add(r.GardenClientMap); err != nil {
return err
}
}
c, err := builder.
ControllerManagedBy(mgr).
Named(ControllerName).
WithOptions(controller.Options{
MaxConcurrentReconciles: 1,
// if going into exponential backoff, wait at most the configured sync period
RateLimiter: workqueue.NewWithMaxWaitRateLimiter(
workqueue.DefaultControllerRateLimiter(),
r.Config.Controllers.GardenCare.SyncPeriod.Duration,
),
}).
Watches(
&operatorv1alpha1.Garden{},
&handler.EnqueueRequestForObject{},
builder.WithPredicates(r.GardenPredicate()),
).Build(r)
if err != nil {
return err
}
r.registerManagedResourceWatchFunc = func() error {
return c.Watch(
source.Kind(mgr.GetCache(), &resourcesv1alpha1.ManagedResource{}),
mapper.EnqueueRequestsFrom(ctx, mgr.GetCache(), mapper.MapFunc(r.MapManagedResourceToGarden), mapper.UpdateWithNew, c.GetLogger()),
predicateutils.ManagedResourceConditionsChanged(),
)
}
return nil
}
// GardenPredicate is a predicate which returns 'true' for create events, and for update events in case the garden was
// successfully reconciled.
func (r *Reconciler) GardenPredicate() predicate.Predicate {
return predicate.Funcs{
CreateFunc: func(event.CreateEvent) bool {
return true
},
UpdateFunc: func(e event.UpdateEvent) bool {
garden, ok := e.ObjectNew.(*operatorv1alpha1.Garden)
if !ok {
return false
}
oldGarden, ok := e.ObjectOld.(*operatorv1alpha1.Garden)
if !ok {
return false
}
// re-evaluate health status right after a reconciliation operation has succeeded
return predicateutils.ReconciliationFinishedSuccessfully(oldGarden.Status.LastOperation, garden.Status.LastOperation)
},
DeleteFunc: func(event.DeleteEvent) bool { return false },
GenericFunc: func(event.GenericEvent) bool { return false },
}
}
// MapManagedResourceToGarden is a mapper.MapFunc for mapping a ManagedResource to the owning Garden.
func (r *Reconciler) MapManagedResourceToGarden(ctx context.Context, log logr.Logger, _ client.Reader, _ client.Object) []reconcile.Request {
gardenList := &operatorv1alpha1.GardenList{}
if err := r.RuntimeClient.List(ctx, gardenList, client.Limit(1)); err != nil {
log.Error(err, "Could not list gardens")
return nil
}
if len(gardenList.Items) == 0 {
return nil
}
garden := gardenList.Items[0]
// A garden reconciliation typically touches most of the existing ManagedResources and this will cause the
// ManagedResource controller to frequently change their conditions. In this case, we don't want to spam the API
// server with updates on the Garden conditions.
if garden.Status.LastOperation != nil && garden.Status.LastOperation.State == gardencorev1beta1.LastOperationStateProcessing {
return nil
}
return []reconcile.Request{{NamespacedName: types.NamespacedName{Name: garden.Name}}}
}