Golang internalclientset.NewForConfig函數代碼示例

// ClientSetForVersion initializes or reuses a clientset for the specified version, or returns an
// error if that is not possible
func (c *ClientCache) ClientSetForVersion(requiredVersion *schema.GroupVersion) (*internalclientset.Clientset, error) {
	if requiredVersion != nil {
		if clientset, ok := c.clientsets[*requiredVersion]; ok {
			return clientset, nil
		}
	}
	config, err := c.ClientConfigForVersion(requiredVersion)
	if err != nil {
		return nil, err
	}

	clientset, err := internalclientset.NewForConfig(config)
	if err != nil {
		return nil, err
	}
	c.clientsets[*config.GroupVersion] = clientset

	// `version` does not necessarily equal `config.Version`.  However, we know that if we call this method again with
	// `version`, we should get a client based on the same config we just found.  There's no guarantee that a client
	// is copiable, so create a new client and save it in the cache.
	if requiredVersion != nil {
		configCopy := *config
		clientset, err := internalclientset.NewForConfig(&configCopy)
		if err != nil {
			return nil, err
		}
		c.clientsets[*requiredVersion] = clientset
	}

	return clientset, nil
}

func main() {
	cc, err := restclient.InClusterConfig()
	if err != nil {
		log.Fatalf("Failed to create client: %v", err)
	}

	kubeClient, err := clientset.NewForConfig(cc)
	if err != nil {
		log.Fatalf("Failed to create client: %v", err)
	}
	listAll := api.ListOptions{LabelSelector: labels.Everything(), FieldSelector: fields.Everything()}
	nodes, err := kubeClient.Core().Nodes().List(listAll)
	if err != nil {
		log.Fatalf("Failed to list nodes: %v", err)
	}
	log.Printf("Nodes:")
	for _, node := range nodes.Items {
		log.Printf("\t%v", node.Name)
	}
	services, err := kubeClient.Core().Services(api.NamespaceDefault).List(listAll)
	if err != nil {
		log.Fatalf("Failed to list services: %v", err)
	}
	log.Printf("Services:")
	for _, svc := range services.Items {
		log.Printf("\t%v", svc.Name)
	}
	log.Printf("Success")
	http.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Ok")
	})
	log.Fatal(http.ListenAndServe(":8080", nil))
}

func newKubeClient(conf *Kube2ConsulConfig) (clientset.Interface, error) {
	var (
		config *restclient.Config
		err    error
	)

	if conf.KubeMasterURL != "" && conf.KubeConfigFile == "" {
		// Only --kubemaster was provided.
		config = &restclient.Config{
			Host:          conf.KubeMasterURL,
			ContentConfig: restclient.ContentConfig{GroupVersion: &unversioned.GroupVersion{Version: "v1"}},
		}
	} else {
		// We either have:
		//  1) --kubemaster and --kubeconfig
		//  2) just --kubeconfig
		//  3) neither flag
		// In any case, the logic is the same.  If (3), this will automatically
		// fall back on the service account token.
		overrides := &kclientcmd.ConfigOverrides{}
		overrides.ClusterInfo.Server = conf.KubeMasterURL                                // might be "", but that is OK
		rules := &kclientcmd.ClientConfigLoadingRules{ExplicitPath: conf.KubeConfigFile} // might be "", but that is OK
		if config, err = kclientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, overrides).ClientConfig(); err != nil {
			return nil, err
		}
	}

	glog.Infof("Using %s for kubernetes master", config.Host)
	glog.Infof("Using kubernetes API %v", config.GroupVersion)
	return clientset.NewForConfig(config)
}

// Returns a clientset which can be used to talk to this apiserver.
func (s *ServerRunOptions) NewSelfClient(token string) (clientset.Interface, error) {
	clientConfig, err := s.NewSelfClientConfig(token)
	if err != nil {
		return nil, err
	}
	return clientset.NewForConfig(clientConfig)
}

func (b SimpleControllerClientBuilder) Client(name string) (clientset.Interface, error) {
	clientConfig, err := b.Config(name)
	if err != nil {
		return nil, err
	}
	return clientset.NewForConfig(restclient.AddUserAgent(clientConfig, name))
}

func main() {
	config := HollowNodeConfig{}
	config.addFlags(pflag.CommandLine)
	flag.InitFlags()

	if !knownMorphs.Has(config.Morph) {
		glog.Fatalf("Unknown morph: %v. Allowed values: %v", config.Morph, knownMorphs.List())
	}

	// create a client to communicate with API server.
	clientConfig, err := config.createClientConfigFromFile()
	if err != nil {
		glog.Fatalf("Failed to create a ClientConfig: %v. Exiting.", err)
	}
	cl, err := client.New(clientConfig)
	if err != nil {
		glog.Fatalf("Failed to create a Client: %v. Exiting.", err)
	}
	clientset, err := internalclientset.NewForConfig(clientConfig)
	if err != nil {
		glog.Fatalf("Failed to create a ClientSet: %v. Exiting.", err)
	}

	if config.Morph == "kubelet" {
		cadvisorInterface := new(cadvisortest.Fake)
		containerManager := cm.NewStubContainerManager()

		fakeDockerClient := dockertools.NewFakeDockerClient()
		fakeDockerClient.EnableSleep = true

		hollowKubelet := kubemark.NewHollowKubelet(
			config.NodeName,
			clientset,
			cadvisorInterface,
			fakeDockerClient,
			config.KubeletPort,
			config.KubeletReadOnlyPort,
			containerManager,
			maxPods,
			podsPerCore,
		)
		hollowKubelet.Run()
	}

	if config.Morph == "proxy" {
		eventBroadcaster := record.NewBroadcaster()
		recorder := eventBroadcaster.NewRecorder(api.EventSource{Component: "kube-proxy", Host: config.NodeName})

		iptInterface := fakeiptables.NewFake()

		serviceConfig := proxyconfig.NewServiceConfig()
		serviceConfig.RegisterHandler(&kubemark.FakeProxyHandler{})

		endpointsConfig := proxyconfig.NewEndpointsConfig()
		endpointsConfig.RegisterHandler(&kubemark.FakeProxyHandler{})

		hollowProxy := kubemark.NewHollowProxyOrDie(config.NodeName, cl, endpointsConfig, serviceConfig, iptInterface, eventBroadcaster, recorder)
		hollowProxy.Run()
	}
}

// TODO(jdef): hacked from kubelet/server/server.go
// TODO(k8s): replace this with clientcmd
func (s *SchedulerServer) createAPIServerClient() (*clientset.Clientset, error) {
	authInfo, err := clientauth.LoadFromFile(s.authPath)
	if err != nil {
		log.Warningf("Could not load kubernetes auth path: %v. Continuing with defaults.", err)
	}
	if authInfo == nil {
		// authInfo didn't load correctly - continue with defaults.
		authInfo = &clientauth.Info{}
	}
	clientConfig, err := authInfo.MergeWithConfig(client.Config{})
	if err != nil {
		return nil, err
	}
	if len(s.apiServerList) < 1 {
		return nil, fmt.Errorf("no api servers specified")
	}
	// TODO: adapt Kube client to support LB over several servers
	if len(s.apiServerList) > 1 {
		log.Infof("Multiple api servers specified.  Picking first one")
	}
	clientConfig.Host = s.apiServerList[0]
	c, err := clientset.NewForConfig(&clientConfig)
	if err != nil {
		return nil, err
	}
	return c, nil
}

func waitForNodeReady() {
	const (
		// nodeReadyTimeout is the time to wait for node to become ready.
		nodeReadyTimeout = 2 * time.Minute
		// nodeReadyPollInterval is the interval to check node ready.
		nodeReadyPollInterval = 1 * time.Second
	)
	config, err := framework.LoadConfig()
	Expect(err).NotTo(HaveOccurred())
	client, err := clientset.NewForConfig(config)
	Expect(err).NotTo(HaveOccurred())
	Eventually(func() error {
		nodes, err := client.Nodes().List(api.ListOptions{})
		Expect(err).NotTo(HaveOccurred())
		if nodes == nil {
			return fmt.Errorf("the node list is nil.")
		}
		Expect(len(nodes.Items) > 1).NotTo(BeTrue())
		if len(nodes.Items) == 0 {
			return fmt.Errorf("empty node list: %+v", nodes)
		}
		node := nodes.Items[0]
		if !api.IsNodeReady(&node) {
			return fmt.Errorf("node is not ready: %+v", node)
		}
		return nil
	}, nodeReadyTimeout, nodeReadyPollInterval).Should(Succeed())
}

func getKubeClient(s *options.KubeletServer) (*clientset.Clientset, error) {
	clientConfig, err := CreateAPIServerClientConfig(s)
	if err == nil {
		kubeClient, err := clientset.NewForConfig(clientConfig)
		if err != nil {
			return nil, err
		}
		return kubeClient, nil
	}
	return nil, err
}

func startNamespaceController() {
	// Use the default QPS
	config := restclient.AddUserAgent(&restclient.Config{Host: framework.TestContext.Host}, "node-e2e-namespace-controller")
	client, err := clientset.NewForConfig(config)
	Expect(err).NotTo(HaveOccurred())
	clientPool := dynamic.NewClientPool(config, dynamic.LegacyAPIPathResolverFunc)
	resources, err := client.Discovery().ServerPreferredNamespacedResources()
	Expect(err).NotTo(HaveOccurred())
	nc := namespacecontroller.NewNamespaceController(client, clientPool, resources, ncResyncPeriod, api.FinalizerKubernetes)
	go nc.Run(ncConcurrency, wait.NeverStop)
}

// Returns a clientset which can be used to talk to this apiserver.
func (s *ServerRunOptions) NewSelfClient() (clientset.Interface, error) {
	clientConfig := &restclient.Config{
		Host: net.JoinHostPort(s.InsecureBindAddress.String(), strconv.Itoa(s.InsecurePort)),
		// Increase QPS limits. The client is currently passed to all admission plugins,
		// and those can be throttled in case of higher load on apiserver - see #22340 and #22422
		// for more details. Once #22422 is fixed, we may want to remove it.
		QPS:   50,
		Burst: 100,
	}
	return clientset.NewForConfig(clientConfig)
}

// getKubeClient is a convenience method for creating kubernetes config and client
// for a given kubeconfig context
func getKubeClient(context string) (*restclient.Config, *internalclientset.Clientset, error) {
	config, err := kube.GetConfig(context).ClientConfig()
	if err != nil {
		return nil, nil, fmt.Errorf("could not get kubernetes config for context '%s': %s", context, err)
	}
	client, err := internalclientset.NewForConfig(config)
	if err != nil {
		return nil, nil, fmt.Errorf("could not get kubernetes client: %s", err)
	}
	return config, client, nil
}

// getAPIServerClient gets a apiserver client.
func getAPIServerClient() (*clientset.Clientset, error) {
	config, err := framework.LoadConfig()
	if err != nil {
		return nil, fmt.Errorf("failed to load config: %v", err)
	}
	client, err := clientset.NewForConfig(config)
	if err != nil {
		return nil, fmt.Errorf("failed to create client: %v", err)
	}
	return client, nil
}

// Start starts the namespace controller.
func (n *NamespaceController) Start() error {
	// Use the default QPS
	config := restclient.AddUserAgent(&restclient.Config{Host: framework.TestContext.Host}, ncName)
	client, err := clientset.NewForConfig(config)
	if err != nil {
		return err
	}
	clientPool := dynamic.NewClientPool(config, registered.RESTMapper(), dynamic.LegacyAPIPathResolverFunc)
	gvrFn := client.Discovery().ServerPreferredNamespacedResources
	nc := namespacecontroller.NewNamespaceController(client, clientPool, gvrFn, ncResyncPeriod, api.FinalizerKubernetes)
	go nc.Run(ncConcurrency, n.stopCh)
	return nil
}

func createClients(numberOfClients int) ([]*clientset.Clientset, []*internalclientset.Clientset, error) {
	clients := make([]*clientset.Clientset, numberOfClients)
	internalClients := make([]*internalclientset.Clientset, numberOfClients)
	for i := 0; i < numberOfClients; i++ {
		config, err := framework.LoadConfig()
		Expect(err).NotTo(HaveOccurred())
		config.QPS = 100
		config.Burst = 200
		if framework.TestContext.KubeAPIContentType != "" {
			config.ContentType = framework.TestContext.KubeAPIContentType
		}

		// For the purpose of this test, we want to force that clients
		// do not share underlying transport (which is a default behavior
		// in Kubernetes). Thus, we are explicitly creating transport for
		// each client here.
		transportConfig, err := config.TransportConfig()
		if err != nil {
			return nil, nil, err
		}
		tlsConfig, err := transport.TLSConfigFor(transportConfig)
		if err != nil {
			return nil, nil, err
		}
		config.Transport = utilnet.SetTransportDefaults(&http.Transport{
			Proxy:               http.ProxyFromEnvironment,
			TLSHandshakeTimeout: 10 * time.Second,
			TLSClientConfig:     tlsConfig,
			MaxIdleConnsPerHost: 100,
			Dial: (&net.Dialer{
				Timeout:   30 * time.Second,
				KeepAlive: 30 * time.Second,
			}).Dial,
		})
		// Overwrite TLS-related fields from config to avoid collision with
		// Transport field.
		config.TLSClientConfig = restclient.TLSClientConfig{}

		c, err := clientset.NewForConfig(config)
		if err != nil {
			return nil, nil, err
		}
		clients[i] = c
		internalClient, err := internalclientset.NewForConfig(config)
		if err != nil {
			return nil, nil, err
		}
		internalClients[i] = internalClient
	}
	return clients, internalClients, nil
}