Golang prometheus.NewGaugeFunc函数代码示例

func (m *Master) installTunneler(nodeTunneler tunneler.Tunneler, nodeClient corev1client.NodeInterface) {
	nodeTunneler.Run(nodeAddressProvider{nodeClient}.externalAddresses)
	m.GenericAPIServer.AddHealthzChecks(healthz.NamedCheck("SSH Tunnel Check", tunneler.TunnelSyncHealthChecker(nodeTunneler)))
	prometheus.NewGaugeFunc(prometheus.GaugeOpts{
		Name: "apiserver_proxy_tunnel_sync_latency_secs",
		Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
	}, func() float64 { return float64(nodeTunneler.SecondsSinceSync()) })
}

func ExampleGaugeFunc() {
	if err := prometheus.Register(prometheus.NewGaugeFunc(
		prometheus.GaugeOpts{
			Subsystem: "runtime",
			Name:      "goroutines_count",
			Help:      "Number of goroutines that currently exist.",
		},
		func() float64 { return float64(runtime.NumGoroutine()) },
	)); err == nil {
		fmt.Println("GaugeFunc 'goroutines_count' registered.")
	}
	// Note that the count of goroutines is a gauge (and not a counter) as
	// it can go up and down.

	// Output:
	// GaugeFunc 'goroutines_count' registered.
}

// NewCollector returns a prometheus.Collector for a given stats var.
// It supports all stats var types except String, StringFunc and Rates.
// The returned collector still needs to be registered with prometheus registry.
func NewCollector(opts prometheus.Opts, v expvar.Var) prometheus.Collector {
	switch st := v.(type) {
	case *stats.Int:
		return prometheus.NewGaugeFunc(prometheus.GaugeOpts(opts), func() float64 {
			return float64(st.Get())
		})
	case stats.IntFunc:
		return prometheus.NewGaugeFunc(prometheus.GaugeOpts(opts), func() float64 {
			return float64(st())
		})
	case *stats.Duration:
		return prometheus.NewGaugeFunc(prometheus.GaugeOpts(opts), func() float64 {
			return st.Get().Seconds()
		})
	case stats.DurationFunc:
		return prometheus.NewGaugeFunc(prometheus.GaugeOpts(opts), func() float64 {
			return st().Seconds()
		})
	case *stats.Float:
		return prometheus.NewGaugeFunc(prometheus.GaugeOpts(opts), st.Get)
	case stats.FloatFunc:
		return prometheus.NewGaugeFunc(prometheus.GaugeOpts(opts), st)
	case *stats.Counters:
		return newCountersCollector(opts, st, "tag")
	case stats.CountersFunc:
		return newCountersCollector(opts, st, "tag")
	case *stats.MultiCounters:
		return newCountersCollector(opts, st, st.Labels()...)
	case *stats.MultiCountersFunc:
		return newCountersCollector(opts, st, st.Labels()...)
	case *stats.Histogram:
		return newHistogramCollector(opts, st)
	case *stats.Timings:
		return newTimingsCollector(opts, st, "category")
	case *stats.MultiTimings:
		return newTimingsCollector(opts, &st.Timings, st.Labels()...)
	case *stats.String:
		// prometheus can't collect string values
		return nil
	case stats.StringFunc:
		// prometheus can't collect string values
		return nil
	case *stats.Rates:
		// Ignore these, because monitoring tools will calculate
		// rates for us.
		return nil
	default:
		log.Warningf("Unsupported type for %s: %T", opts.Name, v)
		return nil
	}
}

// TODO this needs to be refactored so we have a way to add general health checks to genericapiserver
// TODO profiling should be generic
func (m *Master) InstallGeneralEndpoints(c *Config) {
	// Run the tunneler.
	healthzChecks := []healthz.HealthzChecker{}
	if c.Tunneler != nil {
		c.Tunneler.Run(m.getNodeAddresses)
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", genericapiserver.TunnelSyncHealthChecker(c.Tunneler)))
		prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Name: "apiserver_proxy_tunnel_sync_latency_secs",
			Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
		}, func() float64 { return float64(c.Tunneler.SecondsSinceSync()) })
	}
	healthz.InstallHandler(&m.GenericAPIServer.HandlerContainer.NonSwaggerRoutes, healthzChecks...)

	if c.GenericConfig.EnableProfiling {
		routes.MetricsWithReset{}.Install(m.GenericAPIServer.HandlerContainer)
	} else {
		routes.DefaultMetrics{}.Install(m.GenericAPIServer.HandlerContainer)
	}

}

func (m *metric) init() error {
	name := m.Measurable.MsName()
	mangledName := mangleName(name)

	opts := prometheus.Opts{
		Name: mangledName,
		Help: name,
	}

	switch m.Measurable.MsType() {
	case measurable.CounterType:
		mi, ok := m.Measurable.(interface {
			MsInt64() int64
		})
		if !ok {
			return errNotSupported
		}

		m.Metric = prometheus.NewCounterFunc(prometheus.CounterOpts(opts), func() float64 {
			return float64(mi.MsInt64())
		})

	case measurable.GaugeType:
		mi, ok := m.Measurable.(interface {
			MsInt64() int64
		})
		if !ok {
			return errNotSupported
		}

		m.Metric = prometheus.NewGaugeFunc(prometheus.GaugeOpts(opts), func() float64 {
			return float64(mi.MsInt64())
		})

	default:
		return errNotSupported
	}

	return nil
}

//.........这里部分代码省略.........

		// public keyfile is written last, so check for that.
		publicKeyFile := c.SSHKeyfile + ".pub"
		exists, err := util.FileExists(publicKeyFile)
		if err != nil {
			glog.Errorf("Error detecting if key exists: %v", err)
		} else if !exists {
			glog.Infof("Key doesn't exist, attempting to create")
			err := m.generateSSHKey(c.SSHUser, c.SSHKeyfile, publicKeyFile)
			if err != nil {
				glog.Errorf("Failed to create key pair: %v", err)
			}
		}
		m.tunnels = &util.SSHTunnelList{}
		m.dialer = m.Dial
		m.setupSecureProxy(c.SSHUser, c.SSHKeyfile, publicKeyFile)
		m.lastSync = m.clock.Now().Unix()

		// This is pretty ugly.  A better solution would be to pull this all the way up into the
		// server.go file.
		httpKubeletClient, ok := c.KubeletClient.(*client.HTTPKubeletClient)
		if ok {
			httpKubeletClient.Config.Dial = m.dialer
			transport, err := client.MakeTransport(httpKubeletClient.Config)
			if err != nil {
				glog.Errorf("Error setting up transport over SSH: %v", err)
			} else {
				httpKubeletClient.Client.Transport = transport
			}
		} else {
			glog.Errorf("Failed to cast %v to HTTPKubeletClient, skipping SSH tunnel.", c.KubeletClient)
		}
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
		m.lastSyncMetric = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Name: "apiserver_proxy_tunnel_sync_latency_secs",
			Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
		}, func() float64 { return float64(m.secondsSinceSync()) })
	}

	apiVersions := []string{}
	if m.v1 {
		if err := m.api_v1().InstallREST(m.handlerContainer); err != nil {
			glog.Fatalf("Unable to setup API v1: %v", err)
		}
		apiVersions = append(apiVersions, "v1")
	}

	apiserver.InstallSupport(m.muxHelper, m.rootWebService, c.EnableProfiling, healthzChecks...)
	apiserver.AddApiWebService(m.handlerContainer, c.APIPrefix, apiVersions)
	defaultVersion := m.defaultAPIGroupVersion()
	requestInfoResolver := &apiserver.APIRequestInfoResolver{APIPrefixes: util.NewStringSet(strings.TrimPrefix(defaultVersion.Root, "/")), RestMapper: defaultVersion.Mapper}
	apiserver.InstallServiceErrorHandler(m.handlerContainer, requestInfoResolver, apiVersions)

	if m.exp {
		expVersion := m.expapi(c)
		if err := expVersion.InstallREST(m.handlerContainer); err != nil {
			glog.Fatalf("Unable to setup experimental api: %v", err)
		}
		apiserver.AddApiWebService(m.handlerContainer, c.ExpAPIPrefix, []string{expVersion.Version})
		expRequestInfoResolver := &apiserver.APIRequestInfoResolver{APIPrefixes: util.NewStringSet(strings.TrimPrefix(expVersion.Root, "/")), RestMapper: expVersion.Mapper}
		apiserver.InstallServiceErrorHandler(m.handlerContainer, expRequestInfoResolver, []string{expVersion.Version})
	}

	// Register root handler.
	// We do not register this using restful Webservice since we do not want to surface this in api docs.
	// Allow master to be embedded in contexts which already have something registered at the root

func (m *Master) InstallAPIs(c *Config) {
	apiGroupsInfo := []genericapiserver.APIGroupInfo{}

	// Install v1 unless disabled.
	if c.APIResourceConfigSource.AnyResourcesForVersionEnabled(apiv1.SchemeGroupVersion) {
		// Install v1 API.
		m.initV1ResourcesStorage(c)
		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *registered.GroupOrDie(api.GroupName),
			VersionedResourcesStorageMap: map[string]map[string]rest.Storage{
				"v1": m.v1ResourcesStorage,
			},
			IsLegacyGroup:        true,
			Scheme:               api.Scheme,
			ParameterCodec:       api.ParameterCodec,
			NegotiatedSerializer: api.Codecs,
		}
		if autoscalingGroupVersion := (unversioned.GroupVersion{Group: "autoscaling", Version: "v1"}); registered.IsEnabledVersion(autoscalingGroupVersion) {
			apiGroupInfo.SubresourceGroupVersionKind = map[string]unversioned.GroupVersionKind{
				"replicationcontrollers/scale": autoscalingGroupVersion.WithKind("Scale"),
			}
		}
		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	// Run the tunneler.
	healthzChecks := []healthz.HealthzChecker{}
	if m.tunneler != nil {
		m.tunneler.Run(m.getNodeAddresses)
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
		prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Name: "apiserver_proxy_tunnel_sync_latency_secs",
			Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
		}, func() float64 { return float64(m.tunneler.SecondsSinceSync()) })
	}
	healthz.InstallHandler(m.MuxHelper, healthzChecks...)

	if c.EnableProfiling {
		m.MuxHelper.HandleFunc("/metrics", MetricsWithReset)
	} else {
		m.MuxHelper.HandleFunc("/metrics", defaultMetricsHandler)
	}

	// Install extensions unless disabled.
	if c.APIResourceConfigSource.AnyResourcesForVersionEnabled(extensionsapiv1beta1.SchemeGroupVersion) {
		var err error
		m.thirdPartyStorage, err = c.StorageFactory.New(extensions.Resource("thirdpartyresources"))
		if err != nil {
			glog.Fatalf("Error getting third party storage: %v", err)
		}
		m.thirdPartyResources = map[string]thirdPartyEntry{}

		extensionResources := m.getExtensionResources(c)
		extensionsGroupMeta := registered.GroupOrDie(extensions.GroupName)

		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *extensionsGroupMeta,
			VersionedResourcesStorageMap: map[string]map[string]rest.Storage{
				"v1beta1": extensionResources,
			},
			OptionsExternalVersion: &registered.GroupOrDie(api.GroupName).GroupVersion,
			Scheme:                 api.Scheme,
			ParameterCodec:         api.ParameterCodec,
			NegotiatedSerializer:   api.Codecs,
		}
		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	// Install autoscaling unless disabled.
	if c.APIResourceConfigSource.AnyResourcesForVersionEnabled(autoscalingapiv1.SchemeGroupVersion) {
		autoscalingResources := m.getAutoscalingResources(c)
		autoscalingGroupMeta := registered.GroupOrDie(autoscaling.GroupName)

		// Hard code preferred group version to autoscaling/v1
		autoscalingGroupMeta.GroupVersion = autoscalingapiv1.SchemeGroupVersion

		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *autoscalingGroupMeta,
			VersionedResourcesStorageMap: map[string]map[string]rest.Storage{
				"v1": autoscalingResources,
			},
			OptionsExternalVersion: &registered.GroupOrDie(api.GroupName).GroupVersion,
			Scheme:                 api.Scheme,
			ParameterCodec:         api.ParameterCodec,
			NegotiatedSerializer:   api.Codecs,
		}
		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	// Install batch unless disabled.
	if c.APIResourceConfigSource.AnyResourcesForVersionEnabled(batchapiv1.SchemeGroupVersion) ||
		c.APIResourceConfigSource.AnyResourcesForVersionEnabled(batchapiv2alpha1.SchemeGroupVersion) {
		batchv1Resources := m.getBatchResources(c, batchapiv1.SchemeGroupVersion)
		batchGroupMeta := registered.GroupOrDie(batch.GroupName)

		// Hard code preferred group version to batch/v1
		batchGroupMeta.GroupVersion = batchapiv1.SchemeGroupVersion

		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *batchGroupMeta,
//.........这里部分代码省略.........

func (m *Master) InstallAPIs(c *Config) {
	apiGroupsInfo := []genericapiserver.APIGroupInfo{}

	// Install v1 unless disabled.
	if !m.ApiGroupVersionOverrides["api/v1"].Disable {
		// Install v1 API.
		m.initV1ResourcesStorage(c)
		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *registered.GroupOrDie(api.GroupName),
			VersionedResourcesStorageMap: map[string]map[string]rest.Storage{
				"v1": m.v1ResourcesStorage,
			},
			IsLegacyGroup:        true,
			Scheme:               api.Scheme,
			ParameterCodec:       api.ParameterCodec,
			NegotiatedSerializer: api.Codecs,
		}
		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	// Run the tunneler.
	healthzChecks := []healthz.HealthzChecker{}
	if m.tunneler != nil {
		m.tunneler.Run(m.getNodeAddresses)
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
		prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Name: "apiserver_proxy_tunnel_sync_latency_secs",
			Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
		}, func() float64 { return float64(m.tunneler.SecondsSinceSync()) })
	}

	// TODO(nikhiljindal): Refactor generic parts of support services (like /versions) to genericapiserver.
	apiserver.InstallSupport(m.MuxHelper, m.RootWebService, c.EnableProfiling, healthzChecks...)

	// Install root web services
	m.HandlerContainer.Add(m.RootWebService)

	// allGroups records all supported groups at /apis
	allGroups := []unversioned.APIGroup{}
	// Install extensions unless disabled.
	if !m.ApiGroupVersionOverrides["extensions/v1beta1"].Disable {
		m.thirdPartyStorage = c.StorageDestinations.APIGroups[extensions.GroupName].Default
		m.thirdPartyResources = map[string]thirdPartyEntry{}

		extensionResources := m.getExtensionResources(c)
		extensionsGroupMeta := registered.GroupOrDie(extensions.GroupName)
		// Update the prefered version as per StorageVersions in the config.
		storageVersion, found := c.StorageVersions[extensionsGroupMeta.GroupVersion.Group]
		if !found {
			glog.Fatalf("Couldn't find storage version of group %v", extensionsGroupMeta.GroupVersion.Group)
		}
		preferedGroupVersion, err := unversioned.ParseGroupVersion(storageVersion)
		if err != nil {
			glog.Fatalf("Error in parsing group version %s: %v", storageVersion, err)
		}
		extensionsGroupMeta.GroupVersion = preferedGroupVersion

		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *extensionsGroupMeta,
			VersionedResourcesStorageMap: map[string]map[string]rest.Storage{
				"v1beta1": extensionResources,
			},
			OptionsExternalVersion: &registered.GroupOrDie(api.GroupName).GroupVersion,
			Scheme:                 api.Scheme,
			ParameterCodec:         api.ParameterCodec,
			NegotiatedSerializer:   api.Codecs,
		}
		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)

		extensionsGVForDiscovery := unversioned.GroupVersionForDiscovery{
			GroupVersion: extensionsGroupMeta.GroupVersion.String(),
			Version:      extensionsGroupMeta.GroupVersion.Version,
		}
		group := unversioned.APIGroup{
			Name:             extensionsGroupMeta.GroupVersion.Group,
			Versions:         []unversioned.GroupVersionForDiscovery{extensionsGVForDiscovery},
			PreferredVersion: extensionsGVForDiscovery,
		}
		allGroups = append(allGroups, group)
	}
	if err := m.InstallAPIGroups(apiGroupsInfo); err != nil {
		glog.Fatalf("Error in registering group versions: %v", err)
	}

	// This should be done after all groups are registered
	// TODO: replace the hardcoded "apis".
	apiserver.AddApisWebService(m.Serializer, m.HandlerContainer, "/apis", func() []unversioned.APIGroup {
		groups := []unversioned.APIGroup{}
		for ix := range allGroups {
			groups = append(groups, allGroups[ix])
		}
		m.thirdPartyResourcesLock.Lock()
		defer m.thirdPartyResourcesLock.Unlock()
		if m.thirdPartyResources != nil {
			for key := range m.thirdPartyResources {
				groups = append(groups, m.thirdPartyResources[key].group)
			}
		}
		return groups
	})
//.........这里部分代码省略.........

//.........这里部分代码省略.........
		"pods/proxy":       podStorage.Proxy,
		"pods/binding":     podStorage.Binding,
		"bindings":         podStorage.Binding,

		"podTemplates": podTemplateStorage,

		"replicationControllers":        controllerStorage,
		"replicationControllers/status": controllerStatusStorage,
		"services":                      service.NewStorage(m.serviceRegistry, m.endpointRegistry, serviceClusterIPAllocator, serviceNodePortAllocator, m.proxyTransport),
		"endpoints":                     endpointsStorage,
		"nodes":                         nodeStorage,
		"nodes/status":                  nodeStatusStorage,
		"events":                        eventStorage,

		"limitRanges":                   limitRangeStorage,
		"resourceQuotas":                resourceQuotaStorage,
		"resourceQuotas/status":         resourceQuotaStatusStorage,
		"namespaces":                    namespaceStorage,
		"namespaces/status":             namespaceStatusStorage,
		"namespaces/finalize":           namespaceFinalizeStorage,
		"secrets":                       secretStorage,
		"serviceAccounts":               serviceAccountStorage,
		"persistentVolumes":             persistentVolumeStorage,
		"persistentVolumes/status":      persistentVolumeStatusStorage,
		"persistentVolumeClaims":        persistentVolumeClaimStorage,
		"persistentVolumeClaims/status": persistentVolumeClaimStatusStorage,

		"componentStatuses": componentstatus.NewStorage(func() map[string]apiserver.Server { return m.getServersToValidate(c) }),
	}

	if m.tunneler != nil {
		m.tunneler.Run(m.getNodeAddresses)
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
		prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Name: "apiserver_proxy_tunnel_sync_latency_secs",
			Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
		}, func() float64 { return float64(m.tunneler.SecondsSinceSync()) })
	}

	apiVersions := []string{}
	// Install v1 unless disabled.
	if !m.apiGroupVersionOverrides["api/v1"].Disable {
		if err := m.api_v1().InstallREST(m.handlerContainer); err != nil {
			glog.Fatalf("Unable to setup API v1: %v", err)
		}
		apiVersions = append(apiVersions, "v1")
	}

	apiserver.InstallSupport(m.muxHelper, m.rootWebService, c.EnableProfiling, healthzChecks...)
	apiserver.AddApiWebService(m.handlerContainer, c.APIPrefix, apiVersions)
	apiserver.InstallServiceErrorHandler(m.handlerContainer, m.newRequestInfoResolver(), apiVersions)

	// allGroups records all supported groups at /apis
	allGroups := []unversioned.APIGroup{}
	// Install extensions unless disabled.
	if !m.apiGroupVersionOverrides["extensions/v1beta1"].Disable {
		m.thirdPartyStorage = c.StorageDestinations.APIGroups["extensions"].Default
		m.thirdPartyResources = map[string]*thirdpartyresourcedataetcd.REST{}

		expVersion := m.experimental(c)

		if err := expVersion.InstallREST(m.handlerContainer); err != nil {
			glog.Fatalf("Unable to setup experimental api: %v", err)
		}
		g, err := latest.Group("extensions")
		if err != nil {

func (m *Master) InstallAPIs(c *Config) {
	apiGroupsInfo := []genericapiserver.APIGroupInfo{}

	// Install v1 unless disabled.
	if c.APIResourceConfigSource.AnyResourcesForVersionEnabled(apiv1.SchemeGroupVersion) {
		// Install v1 API.
		m.initV1ResourcesStorage(c)
		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *registered.GroupOrDie(api.GroupName),
			VersionedResourcesStorageMap: map[string]map[string]rest.Storage{
				"v1": m.v1ResourcesStorage,
			},
			IsLegacyGroup:        true,
			Scheme:               api.Scheme,
			ParameterCodec:       api.ParameterCodec,
			NegotiatedSerializer: api.Codecs,
		}
		if autoscalingGroupVersion := (unversioned.GroupVersion{Group: "autoscaling", Version: "v1"}); registered.IsEnabledVersion(autoscalingGroupVersion) {
			apiGroupInfo.SubresourceGroupVersionKind = map[string]unversioned.GroupVersionKind{
				"replicationcontrollers/scale": autoscalingGroupVersion.WithKind("Scale"),
			}
		}
		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	// Run the tunneler.
	healthzChecks := []healthz.HealthzChecker{}
	if m.tunneler != nil {
		m.tunneler.Run(m.getNodeAddresses)
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
		prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Name: "apiserver_proxy_tunnel_sync_latency_secs",
			Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
		}, func() float64 { return float64(m.tunneler.SecondsSinceSync()) })
	}
	healthz.InstallHandler(m.MuxHelper, healthzChecks...)

	if c.EnableProfiling {
		m.MuxHelper.HandleFunc("/metrics", MetricsWithReset)
	} else {
		m.MuxHelper.HandleFunc("/metrics", defaultMetricsHandler)
	}

	// Install third party resource support if requested
	// TODO seems like this bit ought to be unconditional and the REST API is controlled by the config
	if c.APIResourceConfigSource.ResourceEnabled(extensionsapiv1beta1.SchemeGroupVersion.WithResource("thirdpartyresources")) {
		var err error
		m.thirdPartyStorage, err = c.StorageFactory.New(extensions.Resource("thirdpartyresources"))
		if err != nil {
			glog.Fatalf("Error getting third party storage: %v", err)
		}
		m.thirdPartyResources = map[string]thirdPartyEntry{}
	}

	restOptionsGetter := func(resource unversioned.GroupResource) generic.RESTOptions {
		return m.GetRESTOptionsOrDie(c, resource)
	}

	// stabilize order.
	// TODO find a better way to configure priority of groups
	for _, group := range sets.StringKeySet(c.RESTStorageProviders).List() {
		if !c.APIResourceConfigSource.AnyResourcesForGroupEnabled(group) {
			continue
		}
		restStorageBuilder := c.RESTStorageProviders[group]
		apiGroupInfo, enabled := restStorageBuilder.NewRESTStorage(c.APIResourceConfigSource, restOptionsGetter)
		if !enabled {
			continue
		}

		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	if err := m.InstallAPIGroups(apiGroupsInfo); err != nil {
		glog.Fatalf("Error in registering group versions: %v", err)
	}
}

func (m *Master) InstallAPIs(c *Config) {
	apiGroupsInfo := []genericapiserver.APIGroupInfo{}

	// Install v1 unless disabled.
	if !m.ApiGroupVersionOverrides["api/v1"].Disable {
		// Install v1 API.
		m.initV1ResourcesStorage(c)
		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *registered.GroupOrDie(api.GroupName),
			VersionedResourcesStorageMap: map[string]map[string]rest.Storage{
				"v1": m.v1ResourcesStorage,
			},
			IsLegacyGroup:        true,
			Scheme:               api.Scheme,
			ParameterCodec:       api.ParameterCodec,
			NegotiatedSerializer: api.Codecs,
		}
		if autoscalingGroupVersion := (unversioned.GroupVersion{Group: "autoscaling", Version: "v1"}); registered.IsEnabledVersion(autoscalingGroupVersion) {
			apiGroupInfo.SubresourceGroupVersionKind = map[string]unversioned.GroupVersionKind{
				"replicationcontrollers/scale": autoscalingGroupVersion.WithKind("Scale"),
			}
		}
		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	// Run the tunneler.
	healthzChecks := []healthz.HealthzChecker{}
	if m.tunneler != nil {
		m.tunneler.Run(m.getNodeAddresses)
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
		prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Name: "apiserver_proxy_tunnel_sync_latency_secs",
			Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
		}, func() float64 { return float64(m.tunneler.SecondsSinceSync()) })
	}

	// TODO(nikhiljindal): Refactor generic parts of support services (like /versions) to genericapiserver.
	apiserver.InstallSupport(m.MuxHelper, m.RootWebService, healthzChecks...)
	if c.EnableProfiling {
		m.MuxHelper.HandleFunc("/resetMetrics", resetMetrics)
	}

	// Install root web services
	m.HandlerContainer.Add(m.RootWebService)

	// allGroups records all supported groups at /apis
	allGroups := []unversioned.APIGroup{}

	// Install extensions unless disabled.
	if !m.ApiGroupVersionOverrides["extensions/v1beta1"].Disable {
		m.thirdPartyStorage = c.StorageDestinations.APIGroups[extensions.GroupName].Default
		m.thirdPartyResources = map[string]thirdPartyEntry{}

		extensionResources := m.getExtensionResources(c)
		extensionsGroupMeta := registered.GroupOrDie(extensions.GroupName)
		// Update the preferred version as per StorageVersions in the config.
		storageVersion, found := c.StorageVersions[extensionsGroupMeta.GroupVersion.Group]
		if !found {
			glog.Fatalf("Couldn't find storage version of group %v", extensionsGroupMeta.GroupVersion.Group)
		}
		preferedGroupVersion, err := unversioned.ParseGroupVersion(storageVersion)
		if err != nil {
			glog.Fatalf("Error in parsing group version %s: %v", storageVersion, err)
		}
		extensionsGroupMeta.GroupVersion = preferedGroupVersion

		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *extensionsGroupMeta,
			VersionedResourcesStorageMap: map[string]map[string]rest.Storage{
				"v1beta1": extensionResources,
			},
			OptionsExternalVersion: &registered.GroupOrDie(api.GroupName).GroupVersion,
			Scheme:                 api.Scheme,
			ParameterCodec:         api.ParameterCodec,
			NegotiatedSerializer:   api.Codecs,
		}
		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)

		extensionsGVForDiscovery := unversioned.GroupVersionForDiscovery{
			GroupVersion: extensionsGroupMeta.GroupVersion.String(),
			Version:      extensionsGroupMeta.GroupVersion.Version,
		}
		group := unversioned.APIGroup{
			Name:             extensionsGroupMeta.GroupVersion.Group,
			Versions:         []unversioned.GroupVersionForDiscovery{extensionsGVForDiscovery},
			PreferredVersion: extensionsGVForDiscovery,
		}
		allGroups = append(allGroups, group)
	}

	// Install autoscaling unless disabled.
	if !m.ApiGroupVersionOverrides["autoscaling/v1"].Disable {
		autoscalingResources := m.getAutoscalingResources(c)
		autoscalingGroupMeta := registered.GroupOrDie(autoscaling.GroupName)

		// Hard code preferred group version to autoscaling/v1
		autoscalingGroupMeta.GroupVersion = unversioned.GroupVersion{Group: "autoscaling", Version: "v1"}

		apiGroupInfo := genericapiserver.APIGroupInfo{
			GroupMeta: *autoscalingGroupMeta,
//.........这里部分代码省略.........

func (m *Master) InstallAPIs(c *Config) {
	restOptionsGetter := func(resource unversioned.GroupResource) generic.RESTOptions {
		return m.restOptionsFactory.NewFor(resource)
	}

	apiGroupsInfo := []genericapiserver.APIGroupInfo{}

	// Install v1 unless disabled.
	if c.GenericConfig.APIResourceConfigSource.AnyResourcesForVersionEnabled(apiv1.SchemeGroupVersion) {
		legacyRESTStorage, apiGroupInfo, err := m.legacyRESTStorageProvider.NewLegacyRESTStorage(restOptionsGetter)
		if err != nil {
			glog.Fatalf("Error building core storage: %v", err)
		}
		m.legacyRESTStorage = legacyRESTStorage

		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	// Run the tunneler.
	healthzChecks := []healthz.HealthzChecker{}
	if m.tunneler != nil {
		m.tunneler.Run(m.getNodeAddresses)
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
		prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Name: "apiserver_proxy_tunnel_sync_latency_secs",
			Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
		}, func() float64 { return float64(m.tunneler.SecondsSinceSync()) })
	}
	healthz.InstallHandler(&m.HandlerContainer.NonSwaggerRoutes, healthzChecks...)

	if c.GenericConfig.EnableProfiling {
		routes.MetricsWithReset{}.Install(m.HandlerContainer)
	} else {
		routes.DefaultMetrics{}.Install(m.HandlerContainer)
	}

	// Install third party resource support if requested
	// TODO seems like this bit ought to be unconditional and the REST API is controlled by the config
	if c.GenericConfig.APIResourceConfigSource.ResourceEnabled(extensionsapiv1beta1.SchemeGroupVersion.WithResource("thirdpartyresources")) {
		var err error
		m.thirdPartyStorageConfig, err = c.StorageFactory.NewConfig(extensions.Resource("thirdpartyresources"))
		if err != nil {
			glog.Fatalf("Error getting third party storage: %v", err)
		}
		m.thirdPartyResources = map[string]*thirdPartyEntry{}
	}

	// stabilize order.
	// TODO find a better way to configure priority of groups
	for _, group := range sets.StringKeySet(c.RESTStorageProviders).List() {
		if !c.GenericConfig.APIResourceConfigSource.AnyResourcesForGroupEnabled(group) {
			glog.V(1).Infof("Skipping disabled API group %q.", group)
			continue
		}
		restStorageBuilder := c.RESTStorageProviders[group]
		apiGroupInfo, enabled := restStorageBuilder.NewRESTStorage(c.GenericConfig.APIResourceConfigSource, restOptionsGetter)
		if !enabled {
			glog.Warningf("Problem initializing API group %q, skipping.", group)
			continue
		}
		glog.V(1).Infof("Enabling API group %q.", group)

		if postHookProvider, ok := restStorageBuilder.(genericapiserver.PostStartHookProvider); ok {
			name, hook, err := postHookProvider.PostStartHook()
			if err != nil {
				glog.Fatalf("Error building PostStartHook: %v", err)
			}
			if err := m.GenericAPIServer.AddPostStartHook(name, hook); err != nil {
				glog.Fatalf("Error registering PostStartHook %q: %v", name, err)
			}
		}

		apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
	}

	for i := range apiGroupsInfo {
		if err := m.InstallAPIGroup(&apiGroupsInfo[i]); err != nil {
			glog.Fatalf("Error in registering group versions: %v", err)
		}
	}
}

	availFS = flag.String("varz_avail_fs",
		"/dcs-ssd",
		"If non-empty, /varz will contain the number of available bytes on the specified filesystem")
)

const (
	bytesPerSector = 512
)

var (
	memAllocBytesGauge = prometheus.NewGaugeFunc(
		prometheus.GaugeOpts{
			Subsystem: "process",
			Name:      "mem_alloc_bytes",
			Help:      "Bytes allocated and still in use.",
		},
		func() float64 {
			var m runtime.MemStats
			runtime.ReadMemStats(&m)
			return float64(m.Alloc)
		},
	)

	availFSGauge = prometheus.NewGaugeFunc(
		prometheus.GaugeOpts{
			Name: "avail_fs_bytes",
			Help: "Number of available bytes on -varz_avail_fs.",
		},
		func() float64 {
			if *availFS != "" {
				var stat syscall.Statfs_t
				if err := syscall.Statfs(*availFS, &stat); err != nil {

	peerStore *raft.JSONPeers
	ircStore  *raft_store.LevelDBStore
	ircServer *ircserver.IRCServer

	executablehash = executableHash()

	// Version is overwritten by Makefile.
	Version = "unknown"

	isLeaderGauge = prometheus.NewGaugeFunc(
		prometheus.GaugeOpts{
			Subsystem: "raft",
			Name:      "isleader",
			Help:      "1 if this node is the raft leader, 0 otherwise",
		},
		func() float64 {
			if node.State() == raft.Leader {
				return 1
			}
			return 0
		},
	)

	sessionsGauge = prometheus.NewGaugeFunc(
		prometheus.GaugeOpts{
			Subsystem: "irc",
			Name:      "sessions",
			Help:      "Number of IRC sessions",
		},
		func() float64 {
			return float64(ircServer.NumSessions())

// init initializes master.
func (m *Master) init(c *Config) {

	if c.ProxyDialer != nil || c.ProxyTLSClientConfig != nil {
		m.proxyTransport = util.SetTransportDefaults(&http.Transport{
			Dial:            c.ProxyDialer,
			TLSClientConfig: c.ProxyTLSClientConfig,
		})
	}

	healthzChecks := []healthz.HealthzChecker{}
	podStorage := podetcd.NewStorage(c.DatabaseStorage, c.EnableWatchCache, c.KubeletClient, m.proxyTransport)

	podTemplateStorage := podtemplateetcd.NewREST(c.DatabaseStorage)

	eventStorage := eventetcd.NewREST(c.DatabaseStorage, uint64(c.EventTTL.Seconds()))
	limitRangeStorage := limitrangeetcd.NewREST(c.DatabaseStorage)

	resourceQuotaStorage, resourceQuotaStatusStorage := resourcequotaetcd.NewREST(c.DatabaseStorage)
	secretStorage := secretetcd.NewREST(c.DatabaseStorage)
	serviceAccountStorage := serviceaccountetcd.NewREST(c.DatabaseStorage)
	persistentVolumeStorage, persistentVolumeStatusStorage := pvetcd.NewREST(c.DatabaseStorage)
	persistentVolumeClaimStorage, persistentVolumeClaimStatusStorage := pvcetcd.NewREST(c.DatabaseStorage)

	namespaceStorage, namespaceStatusStorage, namespaceFinalizeStorage := namespaceetcd.NewREST(c.DatabaseStorage)
	m.namespaceRegistry = namespace.NewRegistry(namespaceStorage)

	endpointsStorage := endpointsetcd.NewREST(c.DatabaseStorage, c.EnableWatchCache)
	m.endpointRegistry = endpoint.NewRegistry(endpointsStorage)

	securityContextConstraintsStorage := sccetcd.NewStorage(c.DatabaseStorage)

	nodeStorage, nodeStatusStorage := nodeetcd.NewREST(c.DatabaseStorage, c.EnableWatchCache, c.KubeletClient, m.proxyTransport)
	m.nodeRegistry = node.NewRegistry(nodeStorage)

	serviceStorage := serviceetcd.NewREST(c.DatabaseStorage)
	m.serviceRegistry = service.NewRegistry(serviceStorage)

	var serviceClusterIPRegistry service.RangeRegistry
	serviceClusterIPAllocator := ipallocator.NewAllocatorCIDRRange(m.serviceClusterIPRange, func(max int, rangeSpec string) allocator.Interface {
		mem := allocator.NewAllocationMap(max, rangeSpec)
		etcd := etcdallocator.NewEtcd(mem, "/ranges/serviceips", "serviceipallocation", c.DatabaseStorage)
		serviceClusterIPRegistry = etcd
		return etcd
	})
	m.serviceClusterIPAllocator = serviceClusterIPRegistry

	var serviceNodePortRegistry service.RangeRegistry
	serviceNodePortAllocator := portallocator.NewPortAllocatorCustom(m.serviceNodePortRange, func(max int, rangeSpec string) allocator.Interface {
		mem := allocator.NewAllocationMap(max, rangeSpec)
		etcd := etcdallocator.NewEtcd(mem, "/ranges/servicenodeports", "servicenodeportallocation", c.DatabaseStorage)
		serviceNodePortRegistry = etcd
		return etcd
	})
	m.serviceNodePortAllocator = serviceNodePortRegistry

	controllerStorage := controlleretcd.NewREST(c.DatabaseStorage)

	// TODO: Factor out the core API registration
	m.storage = map[string]rest.Storage{
		"pods":             podStorage.Pod,
		"pods/attach":      podStorage.Attach,
		"pods/status":      podStorage.Status,
		"pods/log":         podStorage.Log,
		"pods/exec":        podStorage.Exec,
		"pods/portforward": podStorage.PortForward,
		"pods/proxy":       podStorage.Proxy,
		"pods/binding":     podStorage.Binding,
		"bindings":         podStorage.Binding,

		"podTemplates": podTemplateStorage,

		"replicationControllers": controllerStorage,
		"services":               service.NewStorage(m.serviceRegistry, m.endpointRegistry, serviceClusterIPAllocator, serviceNodePortAllocator, m.proxyTransport),
		"endpoints":              endpointsStorage,
		"nodes":                  nodeStorage,
		"nodes/status":           nodeStatusStorage,
		"events":                 eventStorage,

		"limitRanges":                   limitRangeStorage,
		"resourceQuotas":                resourceQuotaStorage,
		"resourceQuotas/status":         resourceQuotaStatusStorage,
		"namespaces":                    namespaceStorage,
		"namespaces/status":             namespaceStatusStorage,
		"namespaces/finalize":           namespaceFinalizeStorage,
		"secrets":                       secretStorage,
		"serviceAccounts":               serviceAccountStorage,
		"securityContextConstraints":    securityContextConstraintsStorage,
		"persistentVolumes":             persistentVolumeStorage,
		"persistentVolumes/status":      persistentVolumeStatusStorage,
		"persistentVolumeClaims":        persistentVolumeClaimStorage,
		"persistentVolumeClaims/status": persistentVolumeClaimStatusStorage,

		"componentStatuses": componentstatus.NewStorage(func() map[string]apiserver.Server { return m.getServersToValidate(c) }),
	}

	if m.tunneler != nil {
		m.tunneler.Run(m.getNodeAddresses)
		healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
		prometheus.NewGaugeFunc(prometheus.GaugeOpts{
//.........这里部分代码省略.........