Golang kubelet.KubeletDeps类代码示例

// RunKubelet is responsible for setting up and running a kubelet.  It is used in three different applications:
//   1 Integration tests
//   2 Kubelet binary
//   3 Standalone 'kubernetes' binary
// Eventually, #2 will be replaced with instances of #3
func RunKubelet(kubeCfg *componentconfig.KubeletConfiguration, kubeDeps *kubelet.KubeletDeps, runOnce bool, standaloneMode bool) error {
	hostname := nodeutil.GetHostname(kubeCfg.HostnameOverride)
	// Query the cloud provider for our node name, default to hostname if kcfg.Cloud == nil
	nodeName, err := getNodeName(kubeDeps.Cloud, hostname)
	if err != nil {
		return err
	}

	eventBroadcaster := record.NewBroadcaster()
	kubeDeps.Recorder = eventBroadcaster.NewRecorder(v1.EventSource{Component: "kubelet", Host: string(nodeName)})
	eventBroadcaster.StartLogging(glog.V(3).Infof)
	if kubeDeps.EventClient != nil {
		glog.V(4).Infof("Sending events to api server.")
		eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: kubeDeps.EventClient.Events("")})
	} else {
		glog.Warning("No api server defined - no events will be sent to API server.")
	}

	// TODO(mtaufen): I moved the validation of these fields here, from UnsecuredKubeletConfig,
	//                so that I could remove the associated fields from KubeletConfig. I would
	//                prefer this to be done as part of an independent validation step on the
	//                KubeletConfiguration. But as far as I can tell, we don't have an explicit
	//                place for validation of the KubeletConfiguration yet.
	hostNetworkSources, err := kubetypes.GetValidatedSources(kubeCfg.HostNetworkSources)
	if err != nil {
		return err
	}

	hostPIDSources, err := kubetypes.GetValidatedSources(kubeCfg.HostPIDSources)
	if err != nil {
		return err
	}

	hostIPCSources, err := kubetypes.GetValidatedSources(kubeCfg.HostIPCSources)
	if err != nil {
		return err
	}

	privilegedSources := capabilities.PrivilegedSources{
		HostNetworkSources: hostNetworkSources,
		HostPIDSources:     hostPIDSources,
		HostIPCSources:     hostIPCSources,
	}
	capabilities.Setup(kubeCfg.AllowPrivileged, privilegedSources, 0)

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

	builder := kubeDeps.Builder
	if builder == nil {
		builder = CreateAndInitKubelet
	}
	if kubeDeps.OSInterface == nil {
		kubeDeps.OSInterface = kubecontainer.RealOS{}
	}
	k, err := builder(kubeCfg, kubeDeps, standaloneMode)
	if err != nil {
		return fmt.Errorf("failed to create kubelet: %v", err)
	}

	// NewMainKubelet should have set up a pod source config if one didn't exist
	// when the builder was run. This is just a precaution.
	if kubeDeps.PodConfig == nil {
		return fmt.Errorf("failed to create kubelet, pod source config was nil!")
	}
	podCfg := kubeDeps.PodConfig

	rlimit.RlimitNumFiles(uint64(kubeCfg.MaxOpenFiles))

	// TODO(dawnchen): remove this once we deprecated old debian containervm images.
	// This is a workaround for issue: https://github.com/opencontainers/runc/issues/726
	// The current chosen number is consistent with most of other os dist.
	const maxkeysPath = "/proc/sys/kernel/keys/root_maxkeys"
	const minKeys uint64 = 1000000
	key, err := ioutil.ReadFile(maxkeysPath)
	if err != nil {
		glog.Errorf("Cannot read keys quota in %s", maxkeysPath)
	} else {
		fields := strings.Fields(string(key))
		nkey, _ := strconv.ParseUint(fields[0], 10, 64)
		if nkey < minKeys {
			glog.Infof("Setting keys quota in %s to %d", maxkeysPath, minKeys)
			err = ioutil.WriteFile(maxkeysPath, []byte(fmt.Sprintf("%d", uint64(minKeys))), 0644)
			if err != nil {
				glog.Warningf("Failed to update %s: %v", maxkeysPath, err)
			}
		}
	}
	const maxbytesPath = "/proc/sys/kernel/keys/root_maxbytes"
	const minBytes uint64 = 25000000
	bytes, err := ioutil.ReadFile(maxbytesPath)
	if err != nil {
		glog.Errorf("Cannot read keys bytes in %s", maxbytesPath)
	} else {
		fields := strings.Fields(string(bytes))
//.........这里部分代码省略.........

func run(s *options.KubeletServer, kubeDeps *kubelet.KubeletDeps) (err error) {
	// TODO: this should be replaced by a --standalone flag
	standaloneMode := (len(s.APIServerList) == 0 && !s.RequireKubeConfig)

	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 file 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
			}
		}
	}

	// Set feature gates based on the value in KubeletConfiguration
	err = utilconfig.DefaultFeatureGate.Set(s.KubeletConfiguration.FeatureGates)
	if err != nil {
		return err
	}

	// Register current configuration with /configz endpoint
	cfgz, cfgzErr := initConfigz(&s.KubeletConfiguration)
	if utilconfig.DefaultFeatureGate.DynamicKubeletConfig() {
		// Look for config on the API server. If it exists, replace s.KubeletConfiguration
		// with it and continue. initKubeletConfigSync also starts the background thread that checks for new config.

		// Don't do dynamic Kubelet configuration in runonce mode
		if s.RunOnce == false {
			remoteKC, err := initKubeletConfigSync(s)
			if err == nil {
				// Update s (KubeletServer) with new config from API server
				s.KubeletConfiguration = *remoteKC
				// Ensure that /configz is up to date with the new config
				if cfgzErr != nil {
					glog.Errorf("was unable to register configz before due to %s, will not be able to set now", cfgzErr)
				} else {
					setConfigz(cfgz, &s.KubeletConfiguration)
				}
				// Update feature gates from the new config
				err = utilconfig.DefaultFeatureGate.Set(s.KubeletConfiguration.FeatureGates)
				if err != nil {
					return err
				}
			}
		}
	}

	if kubeDeps == nil {
		var kubeClient, eventClient *clientset.Clientset
		var cloud cloudprovider.Interface

		if s.CloudProvider != componentconfigv1alpha1.AutoDetectCloudProvider {
			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)
			}
		}

		if s.BootstrapKubeconfig != "" {
			nodeName, err := getNodeName(cloud, nodeutil.GetHostname(s.HostnameOverride))
			if err != nil {
				return err
			}
			if err := bootstrapClientCert(s.KubeConfig.Value(), s.BootstrapKubeconfig, s.CertDirectory, nodeName); err != nil {
				return err
			}
		}

		clientConfig, err := CreateAPIServerClientConfig(s)
		if err == nil {
			kubeClient, err = clientset.NewForConfig(clientConfig)
			if err != nil {
				glog.Warningf("New kubeClient from clientConfig error: %v", err)
			}
			// make a separate client for events
			eventClientConfig := *clientConfig
			eventClientConfig.QPS = float32(s.EventRecordQPS)
			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)
			}
		}
//.........这里部分代码省略.........