forked from gardener/gardener
/
project.go
140 lines (115 loc) · 5.07 KB
/
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"
"sync"
"time"
gardeninformers "github.com/gardener/gardener/pkg/client/garden/informers/externalversions"
gardenlisters "github.com/gardener/gardener/pkg/client/garden/listers/garden/v1beta1"
"github.com/gardener/gardener/pkg/client/kubernetes"
controllerutils "github.com/gardener/gardener/pkg/controllermanager/controller/utils"
"github.com/gardener/gardener/pkg/logger"
kubeinformers "k8s.io/client-go/informers"
kubecorev1listers "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
)
// Controller controls Projects.
type Controller struct {
k8sGardenClient kubernetes.Interface
k8sGardenInformers gardeninformers.SharedInformerFactory
control ControlInterface
recorder record.EventRecorder
projectLister gardenlisters.ProjectLister
projectQueue workqueue.RateLimitingInterface
projectSynced cache.InformerSynced
namespaceLister kubecorev1listers.NamespaceLister
namespaceQueue workqueue.RateLimitingInterface
namespaceSynced cache.InformerSynced
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(k8sGardenClient kubernetes.Interface, gardenInformerFactory gardeninformers.SharedInformerFactory, kubeInformerFactory kubeinformers.SharedInformerFactory, recorder record.EventRecorder) *Controller {
var (
gardenv1beta1Informer = gardenInformerFactory.Garden().V1beta1()
corev1Informer = kubeInformerFactory.Core().V1()
projectInformer = gardenv1beta1Informer.Projects()
projectLister = projectInformer.Lister()
namespaceInformer = corev1Informer.Namespaces()
namespaceLister = namespaceInformer.Lister()
projectUpdater = NewRealUpdater(k8sGardenClient, projectLister)
)
projectController := &Controller{
k8sGardenClient: k8sGardenClient,
k8sGardenInformers: gardenInformerFactory,
control: NewDefaultControl(k8sGardenClient, gardenInformerFactory, recorder, projectUpdater, namespaceLister),
recorder: recorder,
projectLister: projectLister,
projectQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "Project"),
namespaceLister: namespaceLister,
namespaceQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "Namespace"),
workerCh: make(chan int),
}
projectInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: projectController.projectAdd,
UpdateFunc: projectController.projectUpdate,
DeleteFunc: projectController.projectDelete,
})
projectController.projectSynced = projectInformer.Informer().HasSynced
projectController.namespaceSynced = namespaceInformer.Informer().HasSynced
return projectController
}
// 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.projectSynced, c.namespaceSynced) {
logger.Logger.Error("Timed out waiting for caches to sync")
return
}
// Count number of running workers.
go func() {
for {
select {
case res := <-c.workerCh:
c.numberOfRunningWorkers += res
logger.Logger.Debugf("Current number of running Project workers is %d", c.numberOfRunningWorkers)
}
}
}()
logger.Logger.Info("Project controller initialized.")
for i := 0; i < workers; i++ {
controllerutils.CreateWorker(ctx, c.projectQueue, "Project", c.reconcileProjectKey, &waitGroup, c.workerCh)
}
// Shutdown handling
<-ctx.Done()
c.projectQueue.ShutDown()
for {
if c.projectQueue.Len() == 0 && c.numberOfRunningWorkers == 0 {
logger.Logger.Debug("No running Project worker and no items left in the queues. Terminated Project controller...")
break
}
logger.Logger.Debugf("Waiting for %d Project worker(s) to finish (%d item(s) left in the queues)...", c.numberOfRunningWorkers, c.projectQueue.Len())
time.Sleep(5 * time.Second)
}
waitGroup.Wait()
}
// RunningWorkers returns the number of running workers.
func (c *Controller) RunningWorkers() int {
return c.numberOfRunningWorkers
}