// 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(kcfg *KubeletConfig, builder KubeletBuilder) error {
	kcfg.Hostname = nodeutil.GetHostname(kcfg.HostnameOverride)

	if len(kcfg.NodeName) == 0 {
		// Query the cloud provider for our node name, default to Hostname
		nodeName := kcfg.Hostname
		if kcfg.Cloud != nil {
			var err error
			instances, ok := kcfg.Cloud.Instances()
			if !ok {
				return fmt.Errorf("failed to get instances from cloud provider")
			}

			nodeName, err = instances.CurrentNodeName(kcfg.Hostname)
			if err != nil {
				return fmt.Errorf("error fetching current instance name from cloud provider: %v", err)
			}

			glog.V(2).Infof("cloud provider determined current node name to be %s", nodeName)
		}

		kcfg.NodeName = nodeName
	}

	eventBroadcaster := record.NewBroadcaster()
	kcfg.Recorder = eventBroadcaster.NewRecorder(api.EventSource{Component: "kubelet", Host: kcfg.NodeName})
	eventBroadcaster.StartLogging(glog.V(3).Infof)
	if kcfg.KubeClient != nil {
		glog.V(4).Infof("Sending events to api server.")
		eventBroadcaster.StartRecordingToSink(kcfg.KubeClient.Events(""))
	} else {
		glog.Warning("No api server defined - no events will be sent to API server.")
	}
	capabilities.Setup(kcfg.AllowPrivileged, kcfg.HostNetworkSources, 0)

	credentialprovider.SetPreferredDockercfgPath(kcfg.RootDirectory)

	if builder == nil {
		builder = createAndInitKubelet
	}
	if kcfg.OSInterface == nil {
		kcfg.OSInterface = kubecontainer.RealOS{}
	}
	k, podCfg, err := builder(kcfg)
	if err != nil {
		return fmt.Errorf("failed to create kubelet: %v", err)
	}
	// process pods and exit.
	if kcfg.Runonce {
		if _, err := k.RunOnce(podCfg.Updates()); err != nil {
			return fmt.Errorf("runonce failed: %v", err)
		}
		glog.Infof("Started kubelet as runonce")
	} else {
		startKubelet(k, podCfg, kcfg)
		glog.Infof("Started kubelet")
	}
	return nil
}

// 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 TestExampleObjectSchemas(t *testing.T) {
	// Allow privileged containers
	// TODO: make this configurable and not the default https://github.com/openshift/origin/issues/662
	capabilities.Setup(true, capabilities.PrivilegedSources{}, 0)
	cases := map[string]map[string]runtime.Object{
		"../examples/hello-openshift": {
			"hello-pod":     &kapi.Pod{},
			"hello-project": &projectapi.Project{},
		},
		"../examples/sample-app": {
			"github-webhook-example":             nil, // Skip.
			"application-template-stibuild":      &templateapi.Template{},
			"application-template-dockerbuild":   &templateapi.Template{},
			"application-template-custombuild":   &templateapi.Template{},
			"application-template-pullspecbuild": &templateapi.Template{},
		},
		"../examples/jenkins": {
			"jenkins-ephemeral-template":  &templateapi.Template{},
			"jenkins-persistent-template": &templateapi.Template{},
			"application-template":        &templateapi.Template{},
		},
		"../examples/image-streams": {
			"image-streams-centos7": &imageapi.ImageStreamList{},
			"image-streams-rhel7":   &imageapi.ImageStreamList{},
		},
		"../examples/db-templates": {
			"mysql-persistent-template":      &templateapi.Template{},
			"postgresql-persistent-template": &templateapi.Template{},
			"mongodb-persistent-template":    &templateapi.Template{},
			"mysql-ephemeral-template":       &templateapi.Template{},
			"postgresql-ephemeral-template":  &templateapi.Template{},
			"mongodb-ephemeral-template":     &templateapi.Template{},
		},
		"../test/extended/fixtures/ldap": {
			"ldapserver-buildconfig":         &buildapi.BuildConfig{},
			"ldapserver-deploymentconfig":    &deployapi.DeploymentConfig{},
			"ldapserver-imagestream":         &imageapi.ImageStream{},
			"ldapserver-imagestream-testenv": &imageapi.ImageStream{},
			"ldapserver-service":             &kapi.Service{},
		},
		"../test/integration/fixtures": {
			"test-deployment-config":    &deployapi.DeploymentConfig{},
			"test-image":                &imageapi.Image{},
			"test-image-stream":         &imageapi.ImageStream{},
			"test-image-stream-mapping": nil, // skip &imageapi.ImageStreamMapping{},
			"test-route":                &routeapi.Route{},
			"test-service":              &kapi.Service{},
			"test-buildcli":             &kapi.List{},
			"test-buildcli-beta2":       &kapi.List{},
		},
		"../test/templates/fixtures": {
			"crunchydata-pod": nil, // Explicitly fails validation, but should pass transformation
			"guestbook_list":  &templateapi.Template{},
			"guestbook":       &templateapi.Template{},
		},
	}

	for path, expected := range cases {
		tested := 0
		err := walkJSONFiles(path, func(name, path string, data []byte) {
			expectedType, found := expected[name]
			if !found {
				t.Errorf("%s does not have a test case defined", path)
				return
			}
			tested += 1
			if expectedType == nil {
				t.Logf("%q is skipped", path)
				return
			}
			if err := latest.Codec.DecodeInto(data, expectedType); err != nil {
				t.Errorf("%s did not decode correctly: %v\n%s", path, err, string(data))
				return
			}

			validateObject(path, expectedType, t)

		})
		if err != nil {
			t.Errorf("Expected no error, Got %v", err)
		}
		if tested != len(expected) {
			t.Errorf("Expected %d examples, Got %d", len(expected), tested)
		}
	}
}

// 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(kcfg *KubeletConfig) error {
	kcfg.Hostname = nodeutil.GetHostname(kcfg.HostnameOverride)

	if len(kcfg.NodeName) == 0 {
		// Query the cloud provider for our node name, default to Hostname
		nodeName := kcfg.Hostname
		if kcfg.Cloud != nil {
			var err error
			instances, ok := kcfg.Cloud.Instances()
			if !ok {
				return fmt.Errorf("failed to get instances from cloud provider")
			}

			nodeName, err = instances.CurrentNodeName(kcfg.Hostname)
			if err != nil {
				return fmt.Errorf("error fetching current instance name from cloud provider: %v", err)
			}

			glog.V(2).Infof("cloud provider determined current node name to be %s", nodeName)
		}

		kcfg.NodeName = nodeName
	}

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

	privilegedSources := capabilities.PrivilegedSources{
		HostNetworkSources: kcfg.HostNetworkSources,
		HostPIDSources:     kcfg.HostPIDSources,
		HostIPCSources:     kcfg.HostIPCSources,
	}
	capabilities.Setup(kcfg.AllowPrivileged, privilegedSources, 0)

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

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

	rlimit.RlimitNumFiles(kcfg.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))
		nbyte, _ := strconv.ParseUint(fields[0], 10, 64)
		if nbyte < minBytes {
			glog.Infof("Setting keys bytes in %s to %d", maxbytesPath, minBytes)
			err = ioutil.WriteFile(maxbytesPath, []byte(fmt.Sprintf("%d", uint64(minBytes))), 0644)
			if err != nil {
				glog.Warningf("Failed to update %s: %v", maxbytesPath, err)
			}
		}
	}

	// process pods and exit.
//.........这里部分代码省略.........