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project.go
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project.go
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// Copyright (c) 2018 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 project
import (
"context"
"fmt"
"sync"
"time"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/util/wait"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
"github.com/gardener/gardener/pkg/client/kubernetes/clientmap"
"github.com/gardener/gardener/pkg/client/kubernetes/clientmap/keys"
"github.com/gardener/gardener/pkg/controllermanager/apis/config"
"github.com/gardener/gardener/pkg/controllerutils"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
// ControllerName is the name of this controller.
const ControllerName = "project"
// Controller controls Projects.
type Controller struct {
gardenClient client.Client
log logr.Logger
projectReconciler reconcile.Reconciler
projectStaleReconciler reconcile.Reconciler
projectShootActivityReconciler reconcile.Reconciler
hasSyncedFuncs []cache.InformerSynced
projectQueue workqueue.RateLimitingInterface
projectStaleQueue workqueue.RateLimitingInterface
projectShootActivityQueue workqueue.RateLimitingInterface
workerCh chan int
numberOfRunningWorkers int
}
// NewProjectController takes a Kubernetes client for the Garden clusters <k8sGardenClient>, a struct
// holding information about the acting Gardener, a <projectInformer>, and a <recorder> for
// event recording. It creates a new Gardener controller.
func NewProjectController(
ctx context.Context,
log logr.Logger,
clientMap clientmap.ClientMap,
config *config.ControllerManagerConfiguration,
recorder record.EventRecorder,
) (
*Controller,
error,
) {
log = log.WithName(ControllerName)
gardenClient, err := clientMap.GetClient(ctx, keys.ForGarden())
if err != nil {
return nil, err
}
projectInformer, err := gardenClient.Cache().GetInformer(ctx, &gardencorev1beta1.Project{})
if err != nil {
return nil, fmt.Errorf("failed to get Project Informer: %w", err)
}
roleBindingInformer, err := gardenClient.Cache().GetInformer(ctx, &rbacv1.RoleBinding{})
if err != nil {
return nil, fmt.Errorf("failed to get RoleBinding Informer: %w", err)
}
shootInformer, err := gardenClient.Cache().GetInformer(ctx, &gardencorev1beta1.Shoot{})
if err != nil {
return nil, fmt.Errorf("failed to get Shoot Informer: %w", err)
}
projectController := &Controller{
gardenClient: gardenClient.Client(),
log: log,
projectReconciler: NewProjectReconciler(config.Controllers.Project, gardenClient, recorder),
projectStaleReconciler: NewProjectStaleReconciler(config.Controllers.Project, gardenClient.Client()),
projectShootActivityReconciler: NewActivityReconciler(gardenClient.Client()),
projectQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "Project"),
projectStaleQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "Project Stale"),
projectShootActivityQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "Project Activity"),
workerCh: make(chan int),
}
projectInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: projectController.projectAdd,
UpdateFunc: projectController.projectUpdate,
DeleteFunc: projectController.projectDelete,
})
roleBindingInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
UpdateFunc: func(oldObj, newObj interface{}) { projectController.roleBindingUpdate(ctx, oldObj, newObj) },
DeleteFunc: func(obj interface{}) { projectController.roleBindingDelete(ctx, obj) },
})
shootInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: projectController.updateShootActivity,
})
projectController.hasSyncedFuncs = append(projectController.hasSyncedFuncs,
projectInformer.HasSynced,
roleBindingInformer.HasSynced,
shootInformer.HasSynced,
)
return projectController, nil
}
// Run runs the Controller until the given stop channel can be read from.
func (c *Controller) Run(ctx context.Context, workers int) {
var waitGroup sync.WaitGroup
if !cache.WaitForCacheSync(ctx.Done(), c.hasSyncedFuncs...) {
c.log.Error(wait.ErrWaitTimeout, "Timed out waiting for caches to sync")
return
}
// Count number of running workers.
go func() {
for res := range c.workerCh {
c.numberOfRunningWorkers += res
}
}()
c.log.Info("Project controller initialized")
for i := 0; i < workers; i++ {
controllerutils.CreateWorker(ctx, c.projectQueue, "Project", c.projectReconciler, &waitGroup, c.workerCh, controllerutils.WithLogger(c.log.WithName(projectReconcilerName)))
controllerutils.CreateWorker(ctx, c.projectStaleQueue, "Project Stale", c.projectStaleReconciler, &waitGroup, c.workerCh, controllerutils.WithLogger(c.log.WithName(staleReconcilerName)))
controllerutils.CreateWorker(ctx, c.projectShootActivityQueue, "Project Activity", c.projectShootActivityReconciler, &waitGroup, c.workerCh, controllerutils.WithLogger(c.log.WithName(activityReconcilerName)))
}
// Shutdown handling
<-ctx.Done()
c.projectQueue.ShutDown()
c.projectStaleQueue.ShutDown()
c.projectShootActivityQueue.ShutDown()
for {
if c.projectQueue.Len() == 0 && c.projectStaleQueue.Len() == 0 && c.projectShootActivityQueue.Len() == 0 && c.numberOfRunningWorkers == 0 {
c.log.V(1).Info("No running Project worker and no items left in the queues. Terminating Project controller")
break
}
c.log.V(1).Info("Waiting for Project workers to finish", "numberOfRunningWorkers", c.numberOfRunningWorkers, "queueLength", c.projectQueue.Len()+c.projectStaleQueue.Len()+c.projectShootActivityQueue.Len())
time.Sleep(5 * time.Second)
}
waitGroup.Wait()
}