forked from gardener/gardener
/
quota.go
127 lines (105 loc) · 4.24 KB
/
quota.go
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// Copyright 2018 The Gardener Authors.
//
// 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 quota
import (
"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/controller/utils"
"github.com/gardener/gardener/pkg/logger"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
)
// Controller controls Quotas.
type Controller struct {
k8sGardenClient kubernetes.Client
k8sGardenInformers gardeninformers.SharedInformerFactory
control ControlInterface
recorder record.EventRecorder
quotaLister gardenlisters.QuotaLister
quotaQueue workqueue.RateLimitingInterface
quotaSynced cache.InformerSynced
secretBindingLister gardenlisters.SecretBindingLister
workerCh chan int
numberOfRunningWorkers int
}
// NewQuotaController takes a Kubernetes client for the Garden clusters <k8sGardenClient>, a struct
// holding information about the acting Gardener, a <quotaInformer>, and a <recorder> for
// event recording. It creates a new Gardener controller.
func NewQuotaController(k8sGardenClient kubernetes.Client, gardenInformerFactory gardeninformers.SharedInformerFactory, recorder record.EventRecorder) *Controller {
var (
gardenv1beta1Informer = gardenInformerFactory.Garden().V1beta1()
quotaInformer = gardenv1beta1Informer.Quotas()
quotaLister = quotaInformer.Lister()
secretBindingLister = gardenv1beta1Informer.SecretBindings().Lister()
)
quotaController := &Controller{
k8sGardenClient: k8sGardenClient,
k8sGardenInformers: gardenInformerFactory,
control: NewDefaultControl(k8sGardenClient, gardenInformerFactory, recorder, secretBindingLister),
recorder: recorder,
quotaLister: quotaLister,
quotaQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "Quota"),
secretBindingLister: secretBindingLister,
workerCh: make(chan int),
}
quotaInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: quotaController.quotaAdd,
UpdateFunc: quotaController.quotaUpdate,
DeleteFunc: quotaController.quotaDelete,
})
quotaController.quotaSynced = quotaInformer.Informer().HasSynced
return quotaController
}
// Run runs the Controller until the given stop channel can be read from.
func (c *Controller) Run(workers int, stopCh <-chan struct{}) {
var waitGroup sync.WaitGroup
if !cache.WaitForCacheSync(stopCh, c.quotaSynced) {
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 Quota workers is %d", c.numberOfRunningWorkers)
}
}
}()
logger.Logger.Info("Quota controller initialized.")
for i := 0; i < workers; i++ {
controllerutils.CreateWorker(c.quotaQueue, "Quota", c.reconcileQuotaKey, stopCh, &waitGroup, c.workerCh)
}
// Shutdown handling
<-stopCh
c.quotaQueue.ShutDown()
for {
if c.quotaQueue.Len() == 0 && c.numberOfRunningWorkers == 0 {
logger.Logger.Info("No running Quota worker and no items left in the queues. Terminated Quota controller...")
break
}
logger.Logger.Infof("Waiting for %d Quota worker(s) to finish (%d item(s) left in the queues)...", c.numberOfRunningWorkers, c.quotaQueue.Len())
time.Sleep(5 * time.Second)
}
waitGroup.Wait()
}
// RunningWorkers returns the number of running workers.
func (c *Controller) RunningWorkers() int {
return c.numberOfRunningWorkers
}