func loadConfig() (*client.Config, error) {
	switch {
	case testContext.KubeConfig != "":
		fmt.Printf(">>> testContext.KubeConfig: %s\n", testContext.KubeConfig)
		c, err := clientcmd.LoadFromFile(testContext.KubeConfig)
		if err != nil {
			return nil, fmt.Errorf("error loading KubeConfig: %v", err.Error())
		}
		if testContext.KubeContext != "" {
			fmt.Printf(">>> testContext.KubeContext: %s\n", testContext.KubeContext)
			c.CurrentContext = testContext.KubeContext
		}
		return clientcmd.NewDefaultClientConfig(*c, &clientcmd.ConfigOverrides{}).ClientConfig()
	case testContext.AuthConfig != "":
		fmt.Printf(">>> testContext.AuthConfig: %s\n", testContext.AuthConfig)
		config := &client.Config{
			Host: testContext.Host,
		}
		info, err := clientauth.LoadFromFile(testContext.AuthConfig)
		if err != nil {
			return nil, fmt.Errorf("error loading AuthConfig: %v", err.Error())
		}
		// If the certificate directory is provided, set the cert paths to be there.
		if testContext.CertDir != "" {
			Logf("Expecting certs in %v.", testContext.CertDir)
			info.CAFile = filepath.Join(testContext.CertDir, "ca.crt")
			info.CertFile = filepath.Join(testContext.CertDir, "kubecfg.crt")
			info.KeyFile = filepath.Join(testContext.CertDir, "kubecfg.key")
		}
		mergedConfig, err := info.MergeWithConfig(*config)
		return &mergedConfig, err
	default:
		return nil, fmt.Errorf("either KubeConfig or AuthConfig must be specified to load client config")
	}
}

func TestSetWithPathPrefixIntoExistingStruct(t *testing.T) {
	expectedConfig := newRedFederalCowHammerConfig()
	cc := expectedConfig.Clusters["cow-clusters"]
	cinfo := &cc
	cinfo.Server = "http://cow.org:8080/foo/baz"
	expectedConfig.Clusters["cow-cluster"] = *cinfo
	test := configCommandTest{
		args:           []string{"set", "clusters.cow-cluster.server", "http://cow.org:8080/foo/baz"},
		startingConfig: newRedFederalCowHammerConfig(),
		expectedConfig: expectedConfig,
	}

	test.run(t)

	dc := clientcmd.NewDefaultClientConfig(expectedConfig, &clientcmd.ConfigOverrides{})
	dcc, err := dc.ClientConfig()
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	expectedHost := "http://cow.org:8080"
	if expectedHost != dcc.Host {
		t.Fatalf("expected client.Config.Host = %q instead of %q", expectedHost, dcc.Host)
	}
	expectedPrefix := "/foo/baz"
	if expectedPrefix != dcc.Prefix {
		t.Fatalf("expected client.Config.Prefix = %q instead of %q", expectedPrefix, dcc.Prefix)
	}
}

func TestNewFactoryNoFlagBindings(t *testing.T) {
	clientConfig := clientcmd.NewDefaultClientConfig(*clientcmdapi.NewConfig(), &clientcmd.ConfigOverrides{})
	factory := NewFactory(clientConfig)

	if factory.flags.HasFlags() {
		t.Errorf("Expected zero flags, but got %v", factory.flags)
	}
}

func clientFromConfig(path string) (*kclient.Config, string, error) {
	rules := &kclientcmd.ClientConfigLoadingRules{ExplicitPath: path}
	credentials, err := rules.Load()
	if err != nil {
		return nil, "", fmt.Errorf("the provided credentials %q could not be loaded: %v", path, err)
	}
	cfg := kclientcmd.NewDefaultClientConfig(*credentials, &kclientcmd.ConfigOverrides{})
	config, err := cfg.ClientConfig()
	if err != nil {
		return nil, "", fmt.Errorf("the provided credentials %q could not be used: %v", path, err)
	}
	namespace, _ := cfg.Namespace()
	return config, namespace, nil
}

func getKubeClient() (string, *kclient.Client, error) {
	c, err := kclientcmd.LoadFromFile(*kubeConfig)
	if err != nil {
		return "", nil, fmt.Errorf("error loading kubeConfig: %v", err.Error())
	}
	config, err := kclientcmd.NewDefaultClientConfig(
		*c,
		&kclientcmd.ConfigOverrides{
			ClusterInfo: kclientcmdapi.Cluster{
				APIVersion: "v1",
			},
		}).ClientConfig()
	if err != nil {
		return "", nil, fmt.Errorf("error parsing kubeConfig: %v", err.Error())
	}
	kubeClient, err := kclient.New(config)
	if err != nil {
		return "", nil, fmt.Errorf("error creating client - %q", err)
	}

	return c.Clusters[c.CurrentContext].Server, kubeClient, nil
}

//  Get kube client configuration from a file containing credentials for
//  connecting to the master.
func getClientConfig(path string) (*kclient.Config, error) {
	if 0 == len(path) {
		return nil, fmt.Errorf("You must specify a .kubeconfig file path containing credentials for connecting to the master with --credentials")
	}

	rules := &kclientcmd.ClientConfigLoadingRules{ExplicitPath: path, Precedence: []string{}}
	credentials, err := rules.Load()
	if err != nil {
		return nil, fmt.Errorf("Could not load credentials from %q: %v", path, err)
	}

	config, err := kclientcmd.NewDefaultClientConfig(*credentials, &kclientcmd.ConfigOverrides{}).ClientConfig()
	if err != nil {
		return nil, fmt.Errorf("Credentials %q error: %v", path, err)
	}

	if err := kclient.LoadTLSFiles(config); err != nil {
		fmt.Errorf("Unable to load certificate info using credentials from %q: %v", path, err)
	}

	return config, nil
}

func getKubeClient() (string, *kube_client.Client, error) {
	masterIP, err := getMasterIP()
	if err != nil {
		return "", nil, err
	}
	glog.V(1).Infof("Kubernetes master IP is %s", masterIP)

	c, err := clientcmd.LoadFromFile(*kubeConfig)
	if err != nil {
		return "", nil, fmt.Errorf("error loading kubeConfig: %v", err.Error())
	}
	config, err := clientcmd.NewDefaultClientConfig(*c, &clientcmd.ConfigOverrides{}).ClientConfig()
	if err != nil {
		return "", nil, fmt.Errorf("error parsing kubeConfig: %v", err.Error())
	}

	kubeClient, err := kube_client.New(config)
	if err != nil {
		return "", nil, fmt.Errorf("error creating client - %q", err)
	}

	return masterIP, kubeClient, nil
}

// RunCmdRegistry contains all the necessary functionality for the OpenShift cli registry command
func RunCmdRegistry(f *clientcmd.Factory, cmd *cobra.Command, out io.Writer, cfg *RegistryConfig, args []string) error {
	var name string
	switch len(args) {
	case 0:
		name = "docker-registry"
	default:
		return cmdutil.UsageError(cmd, "No arguments are allowed to this command")
	}

	ports, err := app.ContainerPortsFromString(cfg.Ports)
	if err != nil {
		return err
	}

	label := map[string]string{
		"docker-registry": "default",
	}
	if cfg.Labels != defaultLabel {
		valid, remove, err := app.LabelsFromSpec(strings.Split(cfg.Labels, ","))
		if err != nil {
			return err
		}
		if len(remove) > 0 {
			return cmdutil.UsageError(cmd, "You may not pass negative labels in %q", cfg.Labels)
		}
		label = valid
	}

	nodeSelector := map[string]string{}
	if len(cfg.Selector) > 0 {
		valid, remove, err := app.LabelsFromSpec(strings.Split(cfg.Selector, ","))
		if err != nil {
			return err
		}
		if len(remove) > 0 {
			return cmdutil.UsageError(cmd, "You may not pass negative labels in selector %q", cfg.Selector)
		}
		nodeSelector = valid
	}

	image := cfg.ImageTemplate.ExpandOrDie(cfg.Type)

	namespace, _, err := f.OpenShiftClientConfig.Namespace()
	if err != nil {
		return fmt.Errorf("error getting client: %v", err)
	}
	_, kClient, err := f.Clients()
	if err != nil {
		return fmt.Errorf("error getting client: %v", err)
	}

	p, output, err := cmdutil.PrinterForCommand(cmd)
	if err != nil {
		return fmt.Errorf("unable to configure printer: %v", err)
	}

	generate := output
	if !generate {
		_, err = kClient.Services(namespace).Get(name)
		if err != nil {
			if !errors.IsNotFound(err) {
				return fmt.Errorf("can't check for existing docker-registry %q: %v", name, err)
			}
			generate = true
		}
	}

	if generate {
		if cfg.DryRun && !output {
			return fmt.Errorf("docker-registry %q does not exist (no service).", name)
		}

		// create new registry
		if len(cfg.Credentials) == 0 {
			return fmt.Errorf("registry does not exist; you must specify a .kubeconfig file path containing credentials for connecting the registry to the master with --credentials")
		}
		clientConfigLoadingRules := &kclientcmd.ClientConfigLoadingRules{ExplicitPath: cfg.Credentials}
		credentials, err := clientConfigLoadingRules.Load()
		if err != nil {
			return fmt.Errorf("registry does not exist; the provided credentials %q could not be loaded: %v", cfg.Credentials, err)
		}
		config, err := kclientcmd.NewDefaultClientConfig(*credentials, &kclientcmd.ConfigOverrides{}).ClientConfig()
		if err != nil {
			return fmt.Errorf("registry does not exist; the provided credentials %q could not be used: %v", cfg.Credentials, err)
		}
		if err := kclient.LoadTLSFiles(config); err != nil {
			return fmt.Errorf("registry does not exist; the provided credentials %q could not load certificate info: %v", cfg.Credentials, err)
		}
		insecure := "false"
		if config.Insecure {
			insecure = "true"
		} else {
			if len(config.KeyData) == 0 || len(config.CertData) == 0 {
				return fmt.Errorf("registry does not exist; the provided credentials %q are missing the client certificate and/or key", cfg.Credentials)
			}
		}

		env := app.Environment{
			"OPENSHIFT_MASTER":    config.Host,
//.........这里部分代码省略.........

// Negotiate a bearer token with the auth server, or try to reuse one based on the
// information already present. In case of any missing information, ask for user input
// (usually username and password, interactive depending on the Reader).
func (o *LoginOptions) gatherAuthInfo() error {
	directClientConfig, err := o.getClientConfig()
	if err != nil {
		return err
	}

	// make a copy and use it to avoid mutating the original
	t := *directClientConfig
	clientConfig := &t

	// if a token were explicitly provided, try to use it
	if o.tokenProvided() {
		clientConfig.BearerToken = o.Token
		if osClient, err := client.New(clientConfig); err == nil {
			me, err := whoAmI(osClient)
			if err == nil {
				o.Username = me.Name
				o.Config = clientConfig

				fmt.Fprintf(o.Out, "Logged into %q as %q using the token provided.\n\n", o.Config.Host, o.Username)
				return nil
			}

			if !kerrors.IsUnauthorized(err) {
				return err
			}

			fmt.Fprintln(o.Out, "The token provided is invalid (probably expired).\n")
		}
	}

	// if a token was provided try to make use of it
	// make sure we have a username before continuing
	if !o.usernameProvided() {
		if cmdutil.IsTerminal(o.Reader) {
			for !o.usernameProvided() {
				o.Username = cmdutil.PromptForString(o.Reader, "Username: ")
			}
		}
	}

	// search all valid contexts with matching server stanzas to see if we have a matching user stanza
	kubeconfig := *o.StartingKubeConfig
	matchingClusters := getMatchingClusters(*clientConfig, kubeconfig)

	for key, context := range o.StartingKubeConfig.Contexts {
		if matchingClusters.Has(context.Cluster) {
			clientcmdConfig := kclientcmd.NewDefaultClientConfig(kubeconfig, &kclientcmd.ConfigOverrides{CurrentContext: key})
			if kubeconfigClientConfig, err := clientcmdConfig.ClientConfig(); err == nil {
				if osClient, err := client.New(kubeconfigClientConfig); err == nil {
					if me, err := whoAmI(osClient); err == nil && (o.Username == me.Name) {
						clientConfig.BearerToken = kubeconfigClientConfig.BearerToken
						clientConfig.CertFile = kubeconfigClientConfig.CertFile
						clientConfig.CertData = kubeconfigClientConfig.CertData
						clientConfig.KeyFile = kubeconfigClientConfig.KeyFile
						clientConfig.KeyData = kubeconfigClientConfig.KeyData

						o.Config = clientConfig

						if key == o.StartingKubeConfig.CurrentContext {
							fmt.Fprintf(o.Out, "Already logged into %q as %q.\n\n", o.Config.Host, o.Username)
						}

						return nil
					}
				}
			}
		}
	}

	// if kubeconfig doesn't already have a matching user stanza...
	clientConfig.BearerToken = ""
	clientConfig.CertData = []byte{}
	clientConfig.KeyData = []byte{}
	clientConfig.CertFile = o.CertFile
	clientConfig.KeyFile = o.KeyFile
	token, err := tokencmd.RequestToken(o.Config, o.Reader, o.Username, o.Password)
	if err != nil {
		return err
	}
	clientConfig.BearerToken = token

	osClient, err := client.New(clientConfig)
	if err != nil {
		return err
	}

	me, err := whoAmI(osClient)
	if err != nil {
		return err
	}
	o.Username = me.Name
	o.Config = clientConfig
	fmt.Fprintln(o.Out, "Login successful.\n")

	return nil
}

func main() {
	flag.Parse()

	glog.Infof("Starting serve_hostnames soak test with queries=%d and podsPerNode=%d upTo=%d",
		*queriesAverage, *podsPerNode, *upTo)

	var spec string
	if *gke != "" {
		spec = filepath.Join(os.Getenv("HOME"), ".config", "gcloud", "kubernetes", "kubeconfig")
	} else {
		spec = filepath.Join(os.Getenv("HOME"), ".kube", "config")
	}
	settings, err := clientcmd.LoadFromFile(spec)
	if err != nil {
		glog.Fatalf("Error loading configuration: %v", err.Error())
	}
	if *gke != "" {
		settings.CurrentContext = *gke
	}
	config, err := clientcmd.NewDefaultClientConfig(*settings, &clientcmd.ConfigOverrides{}).ClientConfig()
	if err != nil {
		glog.Fatalf("Failed to construct config: %v", err)
	}

	c, err := client.New(config)
	if err != nil {
		glog.Fatalf("Failed to make client: %v", err)
	}

	var nodes *api.NodeList
	for start := time.Now(); time.Since(start) < nodeListTimeout; time.Sleep(2 * time.Second) {
		nodes, err = c.Nodes().List(labels.Everything(), fields.Everything())
		if err == nil {
			break
		}
		glog.Warningf("Failed to list nodes: %v", err)
	}
	if err != nil {
		glog.Fatalf("Giving up trying to list nodes: %v", err)
	}

	if len(nodes.Items) == 0 {
		glog.Fatalf("Failed to find any nodes.")
	}

	glog.Infof("Found %d nodes on this cluster:", len(nodes.Items))
	for i, node := range nodes.Items {
		glog.Infof("%d: %s", i, node.Name)
	}

	queries := *queriesAverage * len(nodes.Items) * *podsPerNode

	// Create the namespace
	got, err := c.Namespaces().Create(&api.Namespace{ObjectMeta: api.ObjectMeta{GenerateName: "serve-hostnames-"}})
	if err != nil {
		glog.Fatalf("Failed to create namespace: %v", err)
	}
	ns := got.Name
	defer func(ns string) {
		if err := c.Namespaces().Delete(ns); err != nil {
			glog.Warningf("Failed to delete namespace ns: %e", ns, err)
		}
	}(ns)
	glog.Infof("Created namespace %s", ns)

	// Create a service for these pods.
	glog.Infof("Creating service %s/serve-hostnames", ns)
	// Make several attempts to create a service.
	var svc *api.Service
	for start := time.Now(); time.Since(start) < serviceCreateTimeout; time.Sleep(2 * time.Second) {
		t := time.Now()
		svc, err = c.Services(ns).Create(&api.Service{
			ObjectMeta: api.ObjectMeta{
				Name: "serve-hostnames",
				Labels: map[string]string{
					"name": "serve-hostname",
				},
			},
			Spec: api.ServiceSpec{
				Ports: []api.ServicePort{{
					Protocol:   "TCP",
					Port:       9376,
					TargetPort: util.NewIntOrStringFromInt(9376),
				}},
				Selector: map[string]string{
					"name": "serve-hostname",
				},
			},
		})
		glog.V(4).Infof("Service create %s/server-hostnames took %v", ns, time.Since(t))
		if err == nil {
			break
		}
		glog.Warningf("After %v failed to create service %s/serve-hostnames: %v", time.Since(start), ns, err)
	}
	if err != nil {
		glog.Warningf("Unable to create service %s/%s: %v", ns, svc.Name, err)
		return
	}
	// Clean up service
//.........这里部分代码省略.........

// RunCmdRouter contains all the necessary functionality for the OpenShift cli router command
func RunCmdRouter(f *clientcmd.Factory, cmd *cobra.Command, out io.Writer, cfg *RouterConfig, args []string) error {
	var name string
	switch len(args) {
	case 0:
		name = "router"
	case 1:
		name = args[0]
	default:
		return cmdutil.UsageError(cmd, "You may pass zero or one arguments to provide a name for the router")
	}

	if len(cfg.StatsUsername) > 0 {
		if strings.Contains(cfg.StatsUsername, ":") {
			return cmdutil.UsageError(cmd, "username %s must not contain ':'", cfg.StatsUsername)
		}
	}

	ports, err := app.ContainerPortsFromString(cfg.Ports)
	if err != nil {
		glog.Fatal(err)
	}

	if cfg.StatsPort > 0 {
		ports = append(ports, kapi.ContainerPort{
			Name:          "stats",
			HostPort:      cfg.StatsPort,
			ContainerPort: cfg.StatsPort,
			Protocol:      kapi.ProtocolTCP,
		})
	}

	label := map[string]string{"router": name}
	if cfg.Labels != defaultLabel {
		valid, remove, err := app.LabelsFromSpec(strings.Split(cfg.Labels, ","))
		if err != nil {
			glog.Fatal(err)
		}
		if len(remove) > 0 {
			return cmdutil.UsageError(cmd, "You may not pass negative labels in %q", cfg.Labels)
		}
		label = valid
	}

	nodeSelector := map[string]string{}
	if len(cfg.Selector) > 0 {
		valid, remove, err := app.LabelsFromSpec(strings.Split(cfg.Selector, ","))
		if err != nil {
			glog.Fatal(err)
		}
		if len(remove) > 0 {
			return cmdutil.UsageError(cmd, "You may not pass negative labels in selector %q", cfg.Selector)
		}
		nodeSelector = valid
	}

	image := cfg.ImageTemplate.ExpandOrDie(cfg.Type)

	namespace, err := f.OpenShiftClientConfig.Namespace()
	if err != nil {
		return fmt.Errorf("error getting client: %v", err)
	}
	_, kClient, err := f.Clients()
	if err != nil {
		return fmt.Errorf("error getting client: %v", err)
	}

	p, output, err := cmdutil.PrinterForCommand(cmd)
	if err != nil {
		return fmt.Errorf("unable to configure printer: %v", err)
	}

	generate := output
	if !generate {
		_, err = kClient.Services(namespace).Get(name)
		if err != nil {
			if !errors.IsNotFound(err) {
				return fmt.Errorf("can't check for existing router %q: %v", name, err)
			}
			generate = true
		}
	}

	if generate {
		if cfg.DryRun && !output {
			return fmt.Errorf("router %q does not exist (no service)", name)
		}

		// create new router
		if len(cfg.Credentials) == 0 {
			return fmt.Errorf("router could not be created; you must specify a .kubeconfig file path containing credentials for connecting the router to the master with --credentials")
		}

		clientConfigLoadingRules := &kclientcmd.ClientConfigLoadingRules{ExplicitPath: cfg.Credentials, Precedence: []string{}}
		credentials, err := clientConfigLoadingRules.Load()
		if err != nil {
			return fmt.Errorf("router could not be created; the provided credentials %q could not be loaded: %v", cfg.Credentials, err)
		}
		config, err := kclientcmd.NewDefaultClientConfig(*credentials, &kclientcmd.ConfigOverrides{}).ClientConfig()
		if err != nil {
//.........这里部分代码省略.........