Function main

examples/workqueue/main.go:144–217

()

}

func main() {
	var kubeconfig string
	var master string

	flag.StringVar(&kubeconfig, "kubeconfig", "", "absolute path to the kubeconfig file")
	flag.StringVar(&master, "master", "", "master url")
	flag.Parse()

	// creates the connection
	config, err := clientcmd.BuildConfigFromFlags(master, kubeconfig)
	if err != nil {
		klog.Fatal(err)
	}

	// creates the clientset
	clientset, err := kubernetes.NewForConfig(config)
	if err != nil {
		klog.Fatal(err)
	}

	// create the pod watcher
	podListWatcher := cache.NewListWatchFromClient(clientset.CoreV1().RESTClient(), "pods", v1.NamespaceDefault, fields.Everything())

	// create the workqueue
	queue := workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter())

	// Bind the workqueue to a cache with the help of an informer. This way we make sure that
	// whenever the cache is updated, the pod key is added to the workqueue.
	// Note that when we finally process the item from the workqueue, we might see a newer version
	// of the Pod than the version which was responsible for triggering the update.
	indexer, informer := cache.NewIndexerInformer(podListWatcher, &v1.Pod{}, 0, cache.ResourceEventHandlerFuncs{
		AddFunc: func(obj interface{}) {
			key, err := cache.MetaNamespaceKeyFunc(obj)
			if err == nil {
				queue.Add(key)
			}
		},
		UpdateFunc: func(old interface{}, new interface{}) {
			key, err := cache.MetaNamespaceKeyFunc(new)
			if err == nil {
				queue.Add(key)
			}
		},
		DeleteFunc: func(obj interface{}) {
			// IndexerInformer uses a delta queue, therefore for deletes we have to use this
			// key function.
			key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj)
			if err == nil {
				queue.Add(key)
			}
		},
	}, cache.Indexers{})

	controller := NewController(queue, indexer, informer)

	// We can now warm up the cache for initial synchronization.
	// Let's suppose that we knew about a pod "mypod" on our last run, therefore add it to the cache.
	// If this pod is not there anymore, the controller will be notified about the removal after the