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cloudprofile.go
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cloudprofile.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 cloudprofile
import (
"context"
"fmt"
"sync"
"time"
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/controllerutils"
"github.com/sirupsen/logrus"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
// Controller controls CloudProfiles.
type Controller struct {
reconciler reconcile.Reconciler
hasSyncedFuncs []cache.InformerSynced
cloudProfileQueue workqueue.RateLimitingInterface
workerCh chan int
numberOfRunningWorkers int
logger *logrus.Logger
}
// NewCloudProfileController takes a Kubernetes client <k8sGardenClient> and a <k8sGardenCoreInformers> for the Garden clusters.
// It creates and return a new Garden controller to control CloudProfiles.
func NewCloudProfileController(
ctx context.Context,
clientMap clientmap.ClientMap,
recorder record.EventRecorder,
logger *logrus.Logger,
) (
*Controller,
error,
) {
gardenClient, err := clientMap.GetClient(ctx, keys.ForGarden())
if err != nil {
return nil, err
}
cloudProfileInformer, err := gardenClient.Cache().GetInformer(ctx, &gardencorev1beta1.CloudProfile{})
if err != nil {
return nil, fmt.Errorf("failed to get CloudProfile Informer: %w", err)
}
cloudProfileController := &Controller{
cloudProfileQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "cloudprofile"),
reconciler: NewCloudProfileReconciler(logger, gardenClient.Client(), recorder),
workerCh: make(chan int),
logger: logger,
}
cloudProfileInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: cloudProfileController.cloudProfileAdd,
UpdateFunc: cloudProfileController.cloudProfileUpdate,
DeleteFunc: cloudProfileController.cloudProfileDelete,
})
cloudProfileController.hasSyncedFuncs = append(cloudProfileController.hasSyncedFuncs, cloudProfileInformer.HasSynced)
return cloudProfileController, 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
// Check if informers cache has been populated
if !cache.WaitForCacheSync(ctx.Done(), c.hasSyncedFuncs...) {
c.logger.Error("Time out waiting for caches to sync")
return
}
go func() {
for res := range c.workerCh {
c.numberOfRunningWorkers += res
c.logger.Debugf("Current number of running CloudProfile workers is %d", c.numberOfRunningWorkers)
}
}()
c.logger.Info("CloudProfile controller initialized.")
// Start the workers
for i := 0; i < workers; i++ {
controllerutils.CreateWorker(ctx, c.cloudProfileQueue, "CloudProfile", c.reconciler, &waitGroup, c.workerCh)
}
<-ctx.Done()
c.cloudProfileQueue.ShutDown()
for {
if c.cloudProfileQueue.Len() == 0 && c.numberOfRunningWorkers == 0 {
c.logger.Debug("No running CloudProfile worker and no items left in the queues. Terminated CloudProfile controller...")
break
}
c.logger.Debugf("Waiting for %d CloudProfile worker(s) to finish (%d item(s) left in the queues)...", c.numberOfRunningWorkers, c.cloudProfileQueue.Len())
time.Sleep(5 * time.Second)
}
waitGroup.Wait()
}