Golang healthz.DefaultHealthz函数代码示例

func init() {
	healthz.DefaultHealthz()
}

// Run runs the specified KubeletServer for the given KubeletConfig.  This should never exit.
// The kcfg argument may be nil - if so, it is initialized from the settings on KubeletServer.
// Otherwise, the caller is assumed to have set up the KubeletConfig object and all defaults
// will be ignored.
func (s *KubeletServer) Run(kcfg *KubeletConfig) error {
	if kcfg == nil {
		cfg, err := s.UnsecuredKubeletConfig()
		if err != nil {
			return err
		}
		kcfg = cfg

		clientConfig, err := s.CreateAPIServerClientConfig()
		if err == nil {
			kcfg.KubeClient, err = client.New(clientConfig)
		}
		if err != nil && len(s.APIServerList) > 0 {
			glog.Warningf("No API client: %v", err)
		}

		cloud, err := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
		if err != nil {
			return err
		}
		glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
		kcfg.Cloud = cloud
	}

	if kcfg.CadvisorInterface == nil {
		ca, err := cadvisor.New(s.CadvisorPort)
		if err != nil {
			return err
		}
		kcfg.CadvisorInterface = ca
	}

	util.ReallyCrash = s.ReallyCrashForTesting
	rand.Seed(time.Now().UTC().UnixNano())

	credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)

	glog.V(2).Infof("Using root directory: %v", s.RootDirectory)

	// TODO(vmarmol): Do this through container config.
	oomAdjuster := oom.NewOomAdjuster()
	if err := oomAdjuster.ApplyOomScoreAdj(0, s.OOMScoreAdj); err != nil {
		glog.Warning(err)
	}

	if err := RunKubelet(kcfg, nil); err != nil {
		return err
	}

	if s.HealthzPort > 0 {
		healthz.DefaultHealthz()
		go util.Until(func() {
			err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
			if err != nil {
				glog.Errorf("Starting health server failed: %v", err)
			}
		}, 5*time.Second, util.NeverStop)
	}

	if s.RunOnce {
		return nil
	}

	// run forever
	select {}
}

//.........这里部分代码省略.........
			eventClientConfig.Burst = int(s.EventBurst)
			eventClient, err = clientset.NewForConfig(&eventClientConfig)
		} else {
			if s.RequireKubeConfig {
				return fmt.Errorf("invalid kubeconfig: %v", err)
			}
			if standaloneMode {
				glog.Warningf("No API client: %v", err)
			}
		}

		kubeDeps, err = UnsecuredKubeletDeps(s)
		if err != nil {
			return err
		}

		kubeDeps.Cloud = cloud
		kubeDeps.KubeClient = kubeClient
		kubeDeps.EventClient = eventClient
	}

	if kubeDeps.Auth == nil {
		nodeName, err := getNodeName(kubeDeps.Cloud, nodeutil.GetHostname(s.HostnameOverride))
		if err != nil {
			return err
		}
		auth, err := buildAuth(nodeName, kubeDeps.KubeClient, s.KubeletConfiguration)
		if err != nil {
			return err
		}
		kubeDeps.Auth = auth
	}

	if kubeDeps.CAdvisorInterface == nil {
		kubeDeps.CAdvisorInterface, err = cadvisor.New(uint(s.CAdvisorPort), s.ContainerRuntime, s.RootDirectory)
		if err != nil {
			return err
		}
	}

	if kubeDeps.ContainerManager == nil {
		if s.SystemCgroups != "" && s.CgroupRoot == "" {
			return fmt.Errorf("invalid configuration: system container was specified and cgroup root was not specified")
		}
		kubeDeps.ContainerManager, err = cm.NewContainerManager(
			kubeDeps.Mounter,
			kubeDeps.CAdvisorInterface,
			cm.NodeConfig{
				RuntimeCgroupsName:    s.RuntimeCgroups,
				SystemCgroupsName:     s.SystemCgroups,
				KubeletCgroupsName:    s.KubeletCgroups,
				ContainerRuntime:      s.ContainerRuntime,
				CgroupsPerQOS:         s.ExperimentalCgroupsPerQOS,
				CgroupRoot:            s.CgroupRoot,
				CgroupDriver:          s.CgroupDriver,
				ProtectKernelDefaults: s.ProtectKernelDefaults,
				EnableCRI:             s.EnableCRI,
			},
			s.ExperimentalFailSwapOn)

		if err != nil {
			return err
		}
	}

	if err := checkPermissions(); err != nil {
		glog.Error(err)
	}

	utilruntime.ReallyCrash = s.ReallyCrashForTesting

	rand.Seed(time.Now().UTC().UnixNano())

	// TODO(vmarmol): Do this through container config.
	oomAdjuster := kubeDeps.OOMAdjuster
	if err := oomAdjuster.ApplyOOMScoreAdj(0, int(s.OOMScoreAdj)); err != nil {
		glog.Warning(err)
	}

	if err := RunKubelet(&s.KubeletConfiguration, kubeDeps, s.RunOnce, standaloneMode); err != nil {
		return err
	}

	if s.HealthzPort > 0 {
		healthz.DefaultHealthz()
		go wait.Until(func() {
			err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress, strconv.Itoa(int(s.HealthzPort))), nil)
			if err != nil {
				glog.Errorf("Starting health server failed: %v", err)
			}
		}, 5*time.Second, wait.NeverStop)
	}

	if s.RunOnce {
		return nil
	}

	<-done
	return nil
}

//.........这里部分代码省略.........
	default:
		log.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
		dockerExecHandler = &dockertools.NativeExecHandler{}
	}

	manifestURLHeader := make(http.Header)
	if s.ManifestURLHeader != "" {
		pieces := strings.Split(s.ManifestURLHeader, ":")
		if len(pieces) != 2 {
			return fmt.Errorf("manifest-url-header must have a single ':' key-value separator, got %q", s.ManifestURLHeader)
		}
		manifestURLHeader.Set(pieces[0], pieces[1])
	}

	kcfg := app.KubeletConfig{
		Address:           s.Address,
		AllowPrivileged:   s.AllowPrivileged,
		CAdvisorInterface: cAdvisorInterface,
		CgroupRoot:        s.CgroupRoot,
		Cloud:             nil, // TODO(jdef) Cloud, specifying null here because we don't want all kubelets polling mesos-master; need to account for this in the cloudprovider impl
		ClusterDNS:        s.ClusterDNS,
		ClusterDomain:     s.ClusterDomain,
		// ConfigFile: ""
		ConfigureCBR0:           s.ConfigureCBR0,
		ContainerRuntime:        s.ContainerRuntime,
		CPUCFSQuota:             s.CPUCFSQuota,
		DiskSpacePolicy:         diskSpacePolicy,
		DockerClient:            dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
		DockerDaemonContainer:   s.DockerDaemonContainer,
		DockerExecHandler:       dockerExecHandler,
		EnableDebuggingHandlers: s.EnableDebuggingHandlers,
		EnableServer:            s.EnableServer,
		EventBurst:              s.EventBurst,
		EventRecordQPS:          s.EventRecordQPS,
		FileCheckFrequency:      s.FileCheckFrequency,
		HostnameOverride:        s.HostnameOverride,
		HostNetworkSources:      hostNetworkSources,
		HostPIDSources:          hostPIDSources,
		HostIPCSources:          hostIPCSources,
		// HTTPCheckFrequency
		ImageGCPolicy: imageGCPolicy,
		KubeClient:    apiclient,
		// ManifestURL: ""
		ManifestURLHeader:         manifestURLHeader,
		MasterServiceNamespace:    s.MasterServiceNamespace,
		MaxContainerCount:         s.MaxContainerCount,
		MaxOpenFiles:              s.MaxOpenFiles,
		MaxPerPodContainerCount:   s.MaxPerPodContainerCount,
		MaxPods:                   s.MaxPods,
		MinimumGCAge:              s.MinimumGCAge,
		Mounter:                   mounter,
		NetworkPluginName:         s.NetworkPluginName,
		NetworkPlugins:            app.ProbeNetworkPlugins(s.NetworkPluginDir),
		NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
		OOMAdjuster:               oomAdjuster,
		OSInterface:               kubecontainer.RealOS{},
		PodCIDR:                   s.PodCIDR,
		PodInfraContainerImage:    s.PodInfraContainerImage,
		Port:              s.Port,
		ReadOnlyPort:      s.ReadOnlyPort,
		RegisterNode:      s.RegisterNode,
		RegistryBurst:     s.RegistryBurst,
		RegistryPullQPS:   s.RegistryPullQPS,
		ResolverConfig:    s.ResolverConfig,
		ResourceContainer: s.ResourceContainer,
		RootDirectory:     s.RootDirectory,
		Runonce:           s.RunOnce,
		// StandaloneMode: false
		StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
		SyncFrequency:                  s.SyncFrequency,
		SystemContainer:                s.SystemContainer,
		TLSOptions:                     tlsOptions,
		VolumePlugins:                  app.ProbeVolumePlugins(),
		Writer:                         writer,
	}

	kcfg.NodeName = kcfg.Hostname

	kcfg.Builder = app.KubeletBuilder(func(kc *app.KubeletConfig) (app.KubeletBootstrap, *kconfig.PodConfig, error) {
		return s.createAndInitKubelet(kc, hks, clientConfig)
	})

	err = app.RunKubelet(&kcfg)
	if err != nil {
		return err
	}

	if s.HealthzPort > 0 {
		healthz.DefaultHealthz()
		go util.Until(func() {
			err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
			if err != nil {
				log.Errorf("Starting health server failed: %v", err)
			}
		}, 5*time.Second, util.NeverStop)
	}

	// block until executor is shut down or commits shutdown
	select {}
}

func run(s *options.KubeletServer, kcfg *KubeletConfig) (err error) {
	if s.ExitOnLockContention && s.LockFilePath == "" {
		return errors.New("cannot exit on lock file contention: no lock file specified")
	}

	done := make(chan struct{})
	if s.LockFilePath != "" {
		glog.Infof("acquiring lock on %q", s.LockFilePath)
		if err := flock.Acquire(s.LockFilePath); err != nil {
			return fmt.Errorf("unable to acquire file lock on %q: %v", s.LockFilePath, err)
		}
		if s.ExitOnLockContention {
			glog.Infof("watching for inotify events for: %v", s.LockFilePath)
			if err := watchForLockfileContention(s.LockFilePath, done); err != nil {
				return err
			}
		}
	}
	if c, err := configz.New("componentconfig"); err == nil {
		c.Set(s.KubeletConfiguration)
	} else {
		glog.Errorf("unable to register configz: %s", err)
	}
	if kcfg == nil {
		cfg, err := UnsecuredKubeletConfig(s)
		if err != nil {
			return err
		}
		kcfg = cfg

		clientConfig, err := CreateAPIServerClientConfig(s)
		if err == nil {
			kcfg.KubeClient, err = clientset.NewForConfig(clientConfig)

			// make a separate client for events
			eventClientConfig := *clientConfig
			eventClientConfig.QPS = float32(s.EventRecordQPS)
			eventClientConfig.Burst = int(s.EventBurst)
			kcfg.EventClient, err = clientset.NewForConfig(&eventClientConfig)
		}
		if err != nil && len(s.APIServerList) > 0 {
			glog.Warningf("No API client: %v", err)
		}

		if s.CloudProvider == kubeExternal.AutoDetectCloudProvider {
			kcfg.AutoDetectCloudProvider = true
		} else {
			cloud, err := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
			if err != nil {
				return err
			}
			if cloud == nil {
				glog.V(2).Infof("No cloud provider specified: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
			} else {
				glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
				kcfg.Cloud = cloud
			}
		}
	}

	if kcfg.CAdvisorInterface == nil {
		kcfg.CAdvisorInterface, err = cadvisor.New(uint(s.CAdvisorPort), kcfg.ContainerRuntime)
		if err != nil {
			return err
		}
	}

	if kcfg.ContainerManager == nil {
		if kcfg.SystemCgroups != "" && kcfg.CgroupRoot == "" {
			return fmt.Errorf("invalid configuration: system container was specified and cgroup root was not specified")
		}
		kcfg.ContainerManager, err = cm.NewContainerManager(kcfg.Mounter, kcfg.CAdvisorInterface, cm.NodeConfig{
			RuntimeCgroupsName: kcfg.RuntimeCgroups,
			SystemCgroupsName:  kcfg.SystemCgroups,
			KubeletCgroupsName: kcfg.KubeletCgroups,
			ContainerRuntime:   kcfg.ContainerRuntime,
			CgroupsPerQOS:      kcfg.CgroupsPerQOS,
			CgroupRoot:         kcfg.CgroupRoot,
		})
		if err != nil {
			return err
		}
	}

	runtime.ReallyCrash = s.ReallyCrashForTesting
	rand.Seed(time.Now().UTC().UnixNano())

	// TODO(vmarmol): Do this through container config.
	oomAdjuster := kcfg.OOMAdjuster
	if err := oomAdjuster.ApplyOOMScoreAdj(0, int(s.OOMScoreAdj)); err != nil {
		glog.Warning(err)
	}

	if err := RunKubelet(kcfg); err != nil {
		return err
	}

	if s.HealthzPort > 0 {
		healthz.DefaultHealthz()
		go wait.Until(func() {
//.........这里部分代码省略.........

// Run runs the specified KubeletServer for the given KubeletConfig.  This should never exit.
// The kcfg argument may be nil - if so, it is initialized from the settings on KubeletServer.
// Otherwise, the caller is assumed to have set up the KubeletConfig object and all defaults
// will be ignored.
func Run(s *options.KubeletServer, kcfg *KubeletConfig) error {
	var err error
	if kcfg == nil {
		cfg, err := UnsecuredKubeletConfig(s)
		if err != nil {
			return err
		}
		kcfg = cfg

		clientConfig, err := CreateAPIServerClientConfig(s)
		if err == nil {
			kcfg.KubeClient, err = client.New(clientConfig)

			// make a separate client for events
			eventClientConfig := *clientConfig
			eventClientConfig.QPS = s.EventRecordQPS
			eventClientConfig.Burst = s.EventBurst
			kcfg.EventClient, err = client.New(&eventClientConfig)
		}
		if err != nil && len(s.APIServerList) > 0 {
			glog.Warningf("No API client: %v", err)
		}

		cloud, err := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
		if err != nil {
			return err
		}
		glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
		kcfg.Cloud = cloud
	}

	if kcfg.CAdvisorInterface == nil {
		kcfg.CAdvisorInterface, err = cadvisor.New(s.CAdvisorPort)
		if err != nil {
			return err
		}
	}

	if kcfg.ContainerManager == nil {
		kcfg.ContainerManager, err = cm.NewContainerManager(kcfg.Mounter, kcfg.CAdvisorInterface)
		if err != nil {
			return err
		}
	}

	runtime.ReallyCrash = s.ReallyCrashForTesting
	rand.Seed(time.Now().UTC().UnixNano())

	credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)

	glog.V(2).Infof("Using root directory: %v", s.RootDirectory)

	// TODO(vmarmol): Do this through container config.
	oomAdjuster := kcfg.OOMAdjuster
	if err := oomAdjuster.ApplyOOMScoreAdj(0, s.OOMScoreAdj); err != nil {
		glog.Warning(err)
	}

	if err := RunKubelet(kcfg); err != nil {
		return err
	}

	if s.HealthzPort > 0 {
		healthz.DefaultHealthz()
		go util.Until(func() {
			err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress, strconv.Itoa(s.HealthzPort)), nil)
			if err != nil {
				glog.Errorf("Starting health server failed: %v", err)
			}
		}, 5*time.Second, util.NeverStop)
	}

	if s.RunOnce {
		return nil
	}

	// run forever
	select {}
}

func run(s *options.KubeletServer, kcfg *KubeletConfig) (err error) {
	if s.LockFilePath != "" {
		glog.Infof("aquiring lock on %q", s.LockFilePath)
		if err := flock.Acquire(s.LockFilePath); err != nil {
			return fmt.Errorf("unable to aquire file lock on %q: %v", s.LockFilePath, err)
		}
	}
	if c, err := configz.New("componentconfig"); err == nil {
		c.Set(s.KubeletConfiguration)
	} else {
		glog.Errorf("unable to register configz: %s", err)
	}
	if kcfg == nil {
		cfg, err := UnsecuredKubeletConfig(s)
		if err != nil {
			return err
		}
		kcfg = cfg

		clientConfig, err := CreateAPIServerClientConfig(s)
		if err == nil {
			kcfg.KubeClient, err = clientset.NewForConfig(clientConfig)

			// make a separate client for events
			eventClientConfig := *clientConfig
			eventClientConfig.QPS = s.EventRecordQPS
			eventClientConfig.Burst = s.EventBurst
			kcfg.EventClient, err = clientset.NewForConfig(&eventClientConfig)
		}
		if err != nil && len(s.APIServerList) > 0 {
			glog.Warningf("No API client: %v", err)
		}

		cloud, err := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
		if err != nil {
			return err
		}
		glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
		kcfg.Cloud = cloud
	}

	if kcfg.CAdvisorInterface == nil {
		kcfg.CAdvisorInterface, err = cadvisor.New(s.CAdvisorPort)
		if err != nil {
			return err
		}
	}

	if kcfg.ContainerManager == nil {
		if kcfg.SystemCgroups != "" && kcfg.CgroupRoot == "" {
			return fmt.Errorf("invalid configuration: system container was specified and cgroup root was not specified")
		}

		kcfg.ContainerManager, err = cm.NewContainerManager(kcfg.Mounter, kcfg.CAdvisorInterface, cm.NodeConfig{
			RuntimeCgroupsName: kcfg.RuntimeCgroups,
			SystemCgroupsName:  kcfg.SystemCgroups,
			KubeletCgroupsName: kcfg.KubeletCgroups,
			ContainerRuntime:   kcfg.ContainerRuntime,
		})
		if err != nil {
			return err
		}
	}

	runtime.ReallyCrash = s.ReallyCrashForTesting
	rand.Seed(time.Now().UTC().UnixNano())

	credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)

	glog.V(2).Infof("Using root directory: %v", s.RootDirectory)

	// TODO(vmarmol): Do this through container config.
	oomAdjuster := kcfg.OOMAdjuster
	if err := oomAdjuster.ApplyOOMScoreAdj(0, s.OOMScoreAdj); err != nil {
		glog.Warning(err)
	}

	if err := RunKubelet(kcfg); err != nil {
		return err
	}

	if s.HealthzPort > 0 {
		healthz.DefaultHealthz()
		go wait.Until(func() {
			err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress, strconv.Itoa(s.HealthzPort)), nil)
			if err != nil {
				glog.Errorf("Starting health server failed: %v", err)
			}
		}, 5*time.Second, wait.NeverStop)
	}

	if s.RunOnce {
		return nil
	}

	// run forever
	select {}
}

//.........这里部分代码省略.........
	//log.Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)

	hostNetworkSources, err := kubelet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
	if err != nil {
		return err
	}

	tlsOptions, err := s.InitializeTLS()
	if err != nil {
		return err
	}
	mounter := mount.New()
	if s.Containerized {
		log.V(2).Info("Running kubelet in containerized mode (experimental)")
		mounter = &mount.NsenterMounter{}
	}

	var dockerExecHandler dockertools.ExecHandler
	switch s.DockerExecHandlerName {
	case "native":
		dockerExecHandler = &dockertools.NativeExecHandler{}
	case "nsenter":
		dockerExecHandler = &dockertools.NsenterExecHandler{}
	default:
		log.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
		dockerExecHandler = &dockertools.NativeExecHandler{}
	}

	kcfg := app.KubeletConfig{
		Address:            s.Address,
		AllowPrivileged:    s.AllowPrivileged,
		HostNetworkSources: hostNetworkSources,
		HostnameOverride:   s.HostnameOverride,
		RootDirectory:      s.RootDirectory,
		// ConfigFile: ""
		// ManifestURL: ""
		FileCheckFrequency: s.FileCheckFrequency,
		// HTTPCheckFrequency
		PodInfraContainerImage:  s.PodInfraContainerImage,
		SyncFrequency:           s.SyncFrequency,
		RegistryPullQPS:         s.RegistryPullQPS,
		RegistryBurst:           s.RegistryBurst,
		MinimumGCAge:            s.MinimumGCAge,
		MaxPerPodContainerCount: s.MaxPerPodContainerCount,
		MaxContainerCount:       s.MaxContainerCount,
		RegisterNode:            s.RegisterNode,
		// StandaloneMode: false
		ClusterDomain:                  s.ClusterDomain,
		ClusterDNS:                     s.ClusterDNS,
		Runonce:                        s.RunOnce,
		Port:                           s.Port,
		ReadOnlyPort:                   s.ReadOnlyPort,
		CadvisorInterface:              cadvisorInterface,
		EnableServer:                   s.EnableServer,
		EnableDebuggingHandlers:        s.EnableDebuggingHandlers,
		DockerClient:                   dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
		KubeClient:                     apiclient,
		MasterServiceNamespace:         s.MasterServiceNamespace,
		VolumePlugins:                  app.ProbeVolumePlugins(),
		NetworkPlugins:                 app.ProbeNetworkPlugins(s.NetworkPluginDir),
		NetworkPluginName:              s.NetworkPluginName,
		StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
		TLSOptions:                     tlsOptions,
		ImageGCPolicy:                  imageGCPolicy,
		DiskSpacePolicy:                diskSpacePolicy,
		Cloud:                          nil, // TODO(jdef) Cloud, specifying null here because we don't want all kubelets polling mesos-master; need to account for this in the cloudprovider impl
		NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
		ResourceContainer:         s.ResourceContainer,
		CgroupRoot:                s.cgroupRoot,
		ContainerRuntime:          s.ContainerRuntime,
		Mounter:                   mounter,
		DockerDaemonContainer:     s.DockerDaemonContainer,
		SystemContainer:           s.SystemContainer,
		ConfigureCBR0:             s.ConfigureCBR0,
		MaxPods:                   s.MaxPods,
		DockerExecHandler:         dockerExecHandler,
	}

	kcfg.NodeName = kcfg.Hostname

	err = app.RunKubelet(&kcfg, app.KubeletBuilder(func(kc *app.KubeletConfig) (app.KubeletBootstrap, *kconfig.PodConfig, error) {
		return s.createAndInitKubelet(kc, hks, clientConfig, shutdownCloser)
	}))
	if err != nil {
		return err
	}

	if s.HealthzPort > 0 {
		healthz.DefaultHealthz()
		go util.Until(func() {
			err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
			if err != nil {
				log.Errorf("Starting health server failed: %v", err)
			}
		}, 5*time.Second, util.NeverStop)
	}

	// block until executor is shut down or commits shutdown
	select {}
}

//.........这里部分代码省略.........
	hostNetworkSources, err := kubelet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
	if err != nil {
		return err
	}

	tlsOptions, err := s.InitializeTLS()
	if err != nil {
		return err
	}

	mounter := mount.New()
	if s.Containerized {
		glog.V(2).Info("Running kubelet in containerized mode (experimental)")
		mounter = mount.NewNsenterMounter()
	}

	var dockerExecHandler dockertools.ExecHandler
	switch s.DockerExecHandlerName {
	case "native":
		dockerExecHandler = &dockertools.NativeExecHandler{}
	case "nsenter":
		dockerExecHandler = &dockertools.NsenterExecHandler{}
	default:
		glog.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
		dockerExecHandler = &dockertools.NativeExecHandler{}
	}

	kcfg := KubeletConfig{
		Address:                        s.Address,
		AllowPrivileged:                s.AllowPrivileged,
		HostNetworkSources:             hostNetworkSources,
		HostnameOverride:               s.HostnameOverride,
		RootDirectory:                  s.RootDirectory,
		ConfigFile:                     s.Config,
		ManifestURL:                    s.ManifestURL,
		ManifestURLHeader:              manifestURLHeader,
		FileCheckFrequency:             s.FileCheckFrequency,
		HTTPCheckFrequency:             s.HTTPCheckFrequency,
		PodInfraContainerImage:         s.PodInfraContainerImage,
		SyncFrequency:                  s.SyncFrequency,
		RegistryPullQPS:                s.RegistryPullQPS,
		RegistryBurst:                  s.RegistryBurst,
		MinimumGCAge:                   s.MinimumGCAge,
		MaxPerPodContainerCount:        s.MaxPerPodContainerCount,
		MaxContainerCount:              s.MaxContainerCount,
		RegisterNode:                   s.RegisterNode,
		StandaloneMode:                 (len(s.APIServerList) == 0),
		ClusterDomain:                  s.ClusterDomain,
		ClusterDNS:                     s.ClusterDNS,
		Runonce:                        s.RunOnce,
		Port:                           s.Port,
		ReadOnlyPort:                   s.ReadOnlyPort,
		CadvisorInterface:              cadvisorInterface,
		EnableServer:                   s.EnableServer,
		EnableDebuggingHandlers:        s.EnableDebuggingHandlers,
		DockerClient:                   dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
		KubeClient:                     apiclient,
		MasterServiceNamespace:         s.MasterServiceNamespace,
		VolumePlugins:                  ProbeVolumePlugins(),
		NetworkPlugins:                 ProbeNetworkPlugins(s.NetworkPluginDir),
		NetworkPluginName:              s.NetworkPluginName,
		StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
		TLSOptions:                     tlsOptions,
		ImageGCPolicy:                  imageGCPolicy,
		DiskSpacePolicy:                diskSpacePolicy,
		Cloud:                          cloud,
		NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
		ResourceContainer:         s.ResourceContainer,
		CgroupRoot:                s.CgroupRoot,
		ContainerRuntime:          s.ContainerRuntime,
		Mounter:                   mounter,
		DockerDaemonContainer:     s.DockerDaemonContainer,
		SystemContainer:           s.SystemContainer,
		ConfigureCBR0:             s.ConfigureCBR0,
		PodCIDR:                   s.PodCIDR,
		MaxPods:                   s.MaxPods,
		DockerExecHandler:         dockerExecHandler,
	}

	if err := RunKubelet(&kcfg, nil); err != nil {
		return err
	}

	if s.HealthzPort > 0 {
		healthz.DefaultHealthz()
		go util.Forever(func() {
			err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
			if err != nil {
				glog.Errorf("Starting health server failed: %v", err)
			}
		}, 5*time.Second)
	}

	if s.RunOnce {
		return nil
	}

	// run forever
	select {}
}