Golang version.Get函数代码示例

// Start launches a master. It will error if possible, but some background processes may still
// be running and the process should exit after it finishes.
func (m *Master) Start() error {
	// Allow privileged containers
	// TODO: make this configurable and not the default https://github.com/openshift/origin/issues/662
	capabilities.Initialize(capabilities.Capabilities{
		AllowPrivileged: true,
		PrivilegedSources: capabilities.PrivilegedSources{
			HostNetworkSources: []string{kubelettypes.ApiserverSource, kubelettypes.FileSource},
			HostPIDSources:     []string{kubelettypes.ApiserverSource, kubelettypes.FileSource},
			HostIPCSources:     []string{kubelettypes.ApiserverSource, kubelettypes.FileSource},
		},
	})

	openshiftConfig, err := origin.BuildMasterConfig(*m.config)
	if err != nil {
		return err
	}

	kubeMasterConfig, err := BuildKubernetesMasterConfig(openshiftConfig)
	if err != nil {
		return err
	}

	switch {
	case m.api:
		glog.Infof("Starting master on %s (%s)", m.config.ServingInfo.BindAddress, version.Get().String())
		glog.Infof("Public master address is %s", m.config.AssetConfig.MasterPublicURL)
		if len(m.config.DisabledFeatures) > 0 {
			glog.V(4).Infof("Disabled features: %s", strings.Join(m.config.DisabledFeatures, ", "))
		}
		glog.Infof("Using images from %q", openshiftConfig.ImageFor("<component>"))

		if err := StartAPI(openshiftConfig, kubeMasterConfig); err != nil {
			return err
		}

	case m.controllers:
		glog.Infof("Starting controllers on %s (%s)", m.config.ServingInfo.BindAddress, version.Get().String())
		if len(m.config.DisabledFeatures) > 0 {
			glog.V(4).Infof("Disabled features: %s", strings.Join(m.config.DisabledFeatures, ", "))
		}
		glog.Infof("Using images from %q", openshiftConfig.ImageFor("<component>"))

		if err := startHealth(openshiftConfig); err != nil {
			return err
		}
	}

	if m.controllers {
		// run controllers asynchronously (not required to be "ready")
		go func() {
			if err := startControllers(openshiftConfig, kubeMasterConfig); err != nil {
				glog.Fatal(err)
			}

			openshiftConfig.Informers.Start(utilwait.NeverStop)
		}()
	}

	return nil
}

// DefaultOpenShiftUserAgent returns the default user agent that clients can use.
func DefaultOpenShiftUserAgent() string {
	commit := version.Get().GitCommit
	if len(commit) > 7 {
		commit = commit[:7]
	}
	if len(commit) == 0 {
		commit = "unknown"
	}
	version := version.Get().GitVersion
	seg := strings.SplitN(version, "-", 2)
	version = seg[0]
	return fmt.Sprintf("%s/%s (%s/%s) openshift/%s", path.Base(os.Args[0]), version, runtime.GOOS, runtime.GOARCH, commit)
}

func main() {
	openshiftCmd := &cobra.Command{
		Use:   "openshift",
		Short: "OpenShift helps you build, deploy, and manage your applications",
		Long:  longDescription,
		Run: func(c *cobra.Command, args []string) {
			c.Help()
		},
	}

	openshiftCmd.AddCommand(master.NewCommandStartAllInOne("start"))
	openshiftCmd.AddCommand(client.NewCommandKubecfg("kube"))
	openshiftCmd.AddCommand(tour.NewCommandTour("tour"))

	// version information
	versionCmd := &cobra.Command{
		Use:   "version",
		Short: "Display version",
		Run: func(c *cobra.Command, args []string) {
			fmt.Printf("openshift %v\n", version.Get())
			fmt.Printf("kubernetes %v\n", kubeversion.Get())
		},
	}
	openshiftCmd.AddCommand(versionCmd)

	if err := openshiftCmd.Execute(); err != nil {
		fmt.Fprintf(os.Stderr, "Error: %s", err)
		os.Exit(1)
	}
}

func StartNode(nodeConfig configapi.NodeConfig) error {
	config, err := kubernetes.BuildKubernetesNodeConfig(nodeConfig)
	if err != nil {
		return err
	}
	glog.Infof("Starting node %s (%s)", config.KubeletServer.HostnameOverride, version.Get().String())

	// preconditions
	config.EnsureVolumeDir()
	config.EnsureDocker(docker.NewHelper())

	// async starts
	config.RunKubelet()
	config.RunSDN()
	config.RunProxy()

	// HACK: RunProxy resets bridge-nf-call-iptables from what openshift-sdn requires
	if config.SDNPlugin != nil {
		sdnPluginName := nodeConfig.NetworkConfig.NetworkPluginName
		if sdnPluginName == osdn.SingleTenantPluginName() || sdnPluginName == osdn.MultiTenantPluginName() {
			if err := sysctl.SetSysctl("net/bridge/bridge-nf-call-iptables", 0); err != nil {
				glog.Warningf("Could not set net.bridge.bridge-nf-call-iptables sysctl: %s", err)
			}
		}
	}

	return nil
}

func (c *AssetConfig) buildAssetHandler() (http.Handler, error) {
	assets.RegisterMimeTypes()

	publicURL, err := url.Parse(c.Options.PublicURL)
	if err != nil {
		glog.Fatal(err)
	}

	assetFunc := assets.JoinAssetFuncs(assets.Asset, java.Asset)
	assetDirFunc := assets.JoinAssetDirFuncs(assets.AssetDir, java.AssetDir)

	handler := http.FileServer(&assetfs.AssetFS{Asset: assetFunc, AssetDir: assetDirFunc, Prefix: ""})

	// Map of context roots (no leading or trailing slash) to the asset path to serve for requests to a missing asset
	subcontextMap := map[string]string{
		"":     "index.html",
		"java": "java/index.html",
	}

	handler, err = assets.HTML5ModeHandler(publicURL.Path, subcontextMap, handler, assetFunc)
	if err != nil {
		return nil, err
	}

	// Cache control should happen after all Vary headers are added, but before
	// any asset related routing (HTML5ModeHandler and FileServer)
	handler = assets.CacheControlHandler(version.Get().GitCommit, handler)

	// Gzip first so that inner handlers can react to the addition of the Vary header
	handler = assets.GzipHandler(handler)

	return handler, nil
}

// handleVersion writes the server's version information.
func handleVersion(req *restful.Request, resp *restful.Response) {
	output, err := json.MarshalIndent(version.Get(), "", "  ")
	if err != nil {
		http.Error(resp.ResponseWriter, err.Error(), http.StatusInternalServerError)
		return
	}
	resp.ResponseWriter.Header().Set("Content-Type", "application/json")
	resp.ResponseWriter.WriteHeader(http.StatusOK)
	resp.ResponseWriter.Write(output)
}

// NewSentryMonitor creates a class that can capture panics and errors from OpenShift
// and Kubernetes that can roll up to a Sentry server.
func NewSentryMonitor(url string) (*SentryMonitor, error) {
	client, err := raven.NewClient(url, nil)
	if err != nil {
		return nil, err
	}
	client.SetRelease(version.Get().GitCommit)
	return &SentryMonitor{
		client: client,
	}, nil
}

func (c *AssetConfig) buildHandler() (http.Handler, error) {
	assets.RegisterMimeTypes()

	masterURL, err := url.Parse(c.Options.MasterPublicURL)
	if err != nil {
		return nil, err
	}

	publicURL, err := url.Parse(c.Options.PublicURL)
	if err != nil {
		glog.Fatal(err)
	}

	config := assets.WebConsoleConfig{
		MasterAddr:        masterURL.Host,
		MasterPrefix:      LegacyOpenShiftAPIPrefix, // TODO: change when the UI changes from v1beta3 to v1
		KubernetesAddr:    masterURL.Host,
		KubernetesPrefix:  KubernetesAPIPrefix,
		OAuthAuthorizeURI: OpenShiftOAuthAuthorizeURL(masterURL.String()),
		OAuthRedirectBase: c.Options.PublicURL,
		OAuthClientID:     OpenShiftWebConsoleClientID,
		LogoutURI:         c.Options.LogoutURL,
	}

	handler := http.FileServer(
		&assetfs.AssetFS{
			assets.Asset,
			assets.AssetDir,
			"",
		},
	)

	// Map of context roots (no leading or trailing slash) to the asset path to serve for requests to a missing asset
	subcontextMap := map[string]string{
		"":     "index.html",
		"java": "java/index.html",
	}

	handler, err = assets.HTML5ModeHandler(publicURL.Path, subcontextMap, handler)
	if err != nil {
		return nil, err
	}

	// Cache control should happen after all Vary headers are added, but before
	// any asset related routing (HTML5ModeHandler and FileServer)
	handler = assets.CacheControlHandler(version.Get().GitCommit, handler)

	// Generated config.js can not be cached since it changes depending on startup options
	handler = assets.GeneratedConfigHandler(config, handler)

	// Gzip first so that inner handlers can react to the addition of the Vary header
	handler = assets.GzipHandler(handler)

	return handler, nil
}

func StartNode(nodeConfig configapi.NodeConfig, components *utilflags.ComponentFlag) error {
	config, err := kubernetes.BuildKubernetesNodeConfig(nodeConfig, components.Enabled(ComponentProxy), components.Enabled(ComponentDNS))
	if err != nil {
		return err
	}

	// In case of openshift network plugin, nodeConfig.networkPluginName is optional and is auto detected/finalized
	// once we build kubernetes node config. So perform plugin name related check here.
	if osdn.IsOpenShiftNetworkPlugin(config.KubeletServer.NetworkPluginName) {
		// TODO: SDN plugin depends on the Kubelet registering as a Node and doesn't retry cleanly,
		// and Kubelet also can't start the PodSync loop until the SDN plugin has loaded.
		if components.Enabled(ComponentKubelet) != components.Enabled(ComponentPlugins) {
			return fmt.Errorf("the SDN plugin must be run in the same process as the kubelet")
		}
	}

	if components.Enabled(ComponentKubelet) {
		glog.Infof("Starting node %s (%s)", config.KubeletServer.HostnameOverride, version.Get().String())
	} else {
		glog.Infof("Starting node networking %s (%s)", config.KubeletServer.HostnameOverride, version.Get().String())
	}

	_, kubeClientConfig, err := configapi.GetKubeClient(nodeConfig.MasterKubeConfig)
	if err != nil {
		return err
	}
	glog.Infof("Connecting to API server %s", kubeClientConfig.Host)

	// preconditions
	if components.Enabled(ComponentKubelet) {
		config.EnsureKubeletAccess()
		config.EnsureVolumeDir()
		config.EnsureDocker(docker.NewHelper())
		config.EnsureLocalQuota(nodeConfig) // must be performed after EnsureVolumeDir
	}

	if components.Enabled(ComponentKubelet) {
		config.RunKubelet()
	}
	if components.Enabled(ComponentPlugins) {
		config.RunPlugin()
	}
	if components.Enabled(ComponentProxy) {
		config.RunProxy()
	}
	if components.Enabled(ComponentDNS) {
		config.RunDNS()
	}

	config.RunServiceStores(components.Enabled(ComponentProxy), components.Enabled(ComponentDNS))

	return nil
}

// Provide a summary at the end
func (l *Logger) Summary(warningsSeen int, errorsSeen int) {
	l.Notice("DL0001", fmt.Sprintf("Summary of diagnostics execution (version %v):\n", version.Get()))
	if warningsSeen > 0 {
		l.Notice("DL0002", fmt.Sprintf("Warnings seen: %d", warningsSeen))
	}
	if errorsSeen > 0 {
		l.Notice("DL0003", fmt.Sprintf("Errors seen: %d", errorsSeen))
	}
	if warningsSeen == 0 && errorsSeen == 0 {
		l.Notice("DL0004", "Completed with no errors or warnings seen.")
	}
}

func newBuilderConfigFromEnvironment(out io.Writer) (*builderConfig, error) {
	cfg := &builderConfig{}
	var err error

	cfg.out = out

	// build (BUILD)
	buildStr := os.Getenv("BUILD")
	glog.V(4).Infof("$BUILD env var is %s \n", buildStr)
	cfg.build = &api.Build{}
	if err := runtime.DecodeInto(kapi.Codecs.UniversalDecoder(), []byte(buildStr), cfg.build); err != nil {
		return nil, fmt.Errorf("unable to parse build: %v", err)
	}
	if errs := validation.ValidateBuild(cfg.build); len(errs) > 0 {
		return nil, errors.NewInvalid(unversioned.GroupKind{Kind: "Build"}, cfg.build.Name, errs)
	}
	glog.V(4).Infof("Build: %#v", cfg.build)

	masterVersion := os.Getenv(api.OriginVersion)
	thisVersion := version.Get().String()
	if len(masterVersion) != 0 && masterVersion != thisVersion {
		fmt.Fprintf(cfg.out, "warning: OpenShift server version %q differs from this image %q\n", masterVersion, thisVersion)
	} else {
		glog.V(4).Infof("Master version %q, Builder version %q", masterVersion, thisVersion)
	}

	// sourceSecretsDir (SOURCE_SECRET_PATH)
	cfg.sourceSecretDir = os.Getenv("SOURCE_SECRET_PATH")

	// dockerClient and dockerEndpoint (DOCKER_HOST)
	// usually not set, defaults to docker socket
	cfg.dockerClient, cfg.dockerEndpoint, err = dockerutil.NewHelper().GetClient()
	if err != nil {
		return nil, fmt.Errorf("no Docker configuration defined: %v", err)
	}

	// buildsClient (KUBERNETES_SERVICE_HOST, KUBERNETES_SERVICE_PORT)
	clientConfig, err := restclient.InClusterConfig()
	if err != nil {
		return nil, fmt.Errorf("cannot connect to the server: %v", err)
	}
	osClient, err := client.New(clientConfig)
	if err != nil {
		return nil, fmt.Errorf("failed to get client: %v", err)
	}
	cfg.buildsClient = osClient.Builds(cfg.build.Namespace)

	return cfg, nil
}

func StartNode(nodeConfig configapi.NodeConfig) error {
	config, err := kubernetes.BuildKubernetesNodeConfig(nodeConfig)
	if err != nil {
		return err
	}
	glog.Infof("Starting node %s (%s)", config.KubeletServer.HostnameOverride, version.Get().String())

	RunSDNController(config, nodeConfig)
	config.EnsureVolumeDir()
	config.EnsureDocker(docker.NewHelper())
	config.RunProxy()
	config.RunKubelet()

	return nil
}

func StartNode(nodeConfig configapi.NodeConfig, components *utilflags.ComponentFlag) error {
	config, err := kubernetes.BuildKubernetesNodeConfig(nodeConfig)
	if err != nil {
		return err
	}

	if components.Enabled(ComponentKubelet) {
		glog.Infof("Starting node %s (%s)", config.KubeletServer.HostnameOverride, version.Get().String())
	} else {
		glog.Infof("Starting node networking %s (%s)", config.KubeletServer.HostnameOverride, version.Get().String())
	}

	_, kubeClientConfig, err := configapi.GetKubeClient(nodeConfig.MasterKubeConfig)
	if err != nil {
		return err
	}
	glog.Infof("Connecting to API server %s", kubeClientConfig.Host)

	// preconditions
	if components.Enabled(ComponentKubelet) {
		config.EnsureKubeletAccess()
		config.EnsureVolumeDir()
		config.EnsureDocker(docker.NewHelper())
		config.EnsureLocalQuota(nodeConfig) // must be performed after EnsureVolumeDir
	}

	// TODO: SDN plugin depends on the Kubelet registering as a Node and doesn't retry cleanly,
	// and Kubelet also can't start the PodSync loop until the SDN plugin has loaded.
	if components.Enabled(ComponentKubelet) {
		config.RunKubelet()
	}
	// SDN plugins get the opportunity to filter service rules, so they start first
	if components.Enabled(ComponentPlugins) {
		config.RunPlugin()
	}
	if components.Enabled(ComponentProxy) {
		config.RunProxy()
	}
	// if we are running plugins in this process, reset the bridge ip rule
	if components.Enabled(ComponentPlugins) {
		config.ResetSysctlFromProxy()
	}

	return nil
}

func newBuilderConfigFromEnvironment() (*builderConfig, error) {
	cfg := &builderConfig{}
	var err error

	// build (BUILD)
	buildStr := os.Getenv("BUILD")
	glog.V(4).Infof("$BUILD env var is %s \n", buildStr)
	cfg.build = &api.Build{}
	if err = runtime.DecodeInto(kapi.Codecs.UniversalDecoder(), []byte(buildStr), cfg.build); err != nil {
		return nil, fmt.Errorf("unable to parse build: %v", err)
	}

	masterVersion := os.Getenv(api.OriginVersion)
	thisVersion := version.Get().String()
	if len(masterVersion) != 0 && masterVersion != thisVersion {
		glog.Warningf("Master version %q does not match Builder image version %q", masterVersion, thisVersion)
	} else {
		glog.V(2).Infof("Master version %q, Builder version %q", masterVersion, thisVersion)
	}

	// sourceSecretsDir (SOURCE_SECRET_PATH)
	cfg.sourceSecretDir = os.Getenv("SOURCE_SECRET_PATH")

	// dockerClient and dockerEndpoint (DOCKER_HOST)
	// usually not set, defaults to docker socket
	cfg.dockerClient, cfg.dockerEndpoint, err = dockerutil.NewHelper().GetClient()
	if err != nil {
		return nil, fmt.Errorf("error obtaining docker client: %v", err)
	}

	// buildsClient (KUBERNETES_SERVICE_HOST, KUBERNETES_SERVICE_PORT)
	clientConfig, err := restclient.InClusterConfig()
	if err != nil {
		return nil, fmt.Errorf("failed to get client config: %v", err)
	}
	osClient, err := client.New(clientConfig)
	if err != nil {
		return nil, fmt.Errorf("error obtaining OpenShift client: %v", err)
	}
	cfg.buildsClient = osClient.Builds(cfg.build.Namespace)

	return cfg, nil
}

// initVersionRoute initializes an HTTP endpoint for the server's version information.
func initVersionRoute(container *restful.Container, path string) {
	// Build version info once
	versionInfo, err := json.MarshalIndent(version.Get(), "", "  ")
	if err != nil {
		glog.Errorf("Unable to initialize version route: %v", err)
		return
	}

	// Set up a service to return the git code version.
	versionWS := new(restful.WebService)
	versionWS.Path(path)
	versionWS.Doc("git code version from which this is built")
	versionWS.Route(
		versionWS.GET("/").To(func(_ *restful.Request, resp *restful.Response) {
			writeJSON(resp, versionInfo)
		}).
			Doc("get the code version").
			Operation("getCodeVersion").
			Produces(restful.MIME_JSON))

	container.Add(versionWS)
}