Golang options.NewKubeletServer函數代碼示例

// NewKubeletCommand provides a CLI handler for the 'kubelet' command
func NewKubeletCommand(name, fullName string, out io.Writer) *cobra.Command {
	kubeletOptions := kubeletoptions.NewKubeletServer()

	cmd := &cobra.Command{
		Use:   name,
		Short: "Launch the Kubelet (kubelet)",
		Long:  kubeletLog,
		Run: func(c *cobra.Command, args []string) {
			startProfiler()

			util.InitLogs()
			defer util.FlushLogs()

			if err := kubeletapp.Run(kubeletOptions, nil); err != nil {
				fmt.Fprintf(os.Stderr, "%v\n", err)
				os.Exit(1)
			}
		},
	}
	cmd.SetOutput(out)

	flags := cmd.Flags()
	flags.SetNormalizeFunc(util.WordSepNormalizeFunc)
	flags.AddGoFlagSet(flag.CommandLine)
	kubeletOptions.AddFlags(flags)

	return cmd
}

// NewKubeletCommand creates a *cobra.Command object with default parameters
func NewKubeletCommand() *cobra.Command {
	s := options.NewKubeletServer()
	s.AddFlags(pflag.CommandLine)
	cmd := &cobra.Command{
		Use: "kubelet",
		Long: `The kubelet is the primary "node agent" that runs on each
node. The kubelet works in terms of a PodSpec. A PodSpec is a YAML or JSON object
that describes a pod. The kubelet takes a set of PodSpecs that are provided through
various mechanisms (primarily through the apiserver) and ensures that the containers
described in those PodSpecs are running and healthy.

Other than from an PodSpec from the apiserver, there are three ways that a container
manifest can be provided to the Kubelet.

File: Path passed as a flag on the command line. This file is rechecked every 20
seconds (configurable with a flag).

HTTP endpoint: HTTP endpoint passed as a parameter on the command line. This endpoint
is checked every 20 seconds (also configurable with a flag).

HTTP server: The kubelet can also listen for HTTP and respond to a simple API
(underspec'd currently) to submit a new manifest.`,
		Run: func(cmd *cobra.Command, args []string) {
		},
	}

	return cmd
}

func StartKubeletServer(lk LocalkubeServer) func() error {
	config := options.NewKubeletServer()

	// Master details
	config.APIServerList = []string{lk.GetAPIServerInsecureURL()}

	// Set containerized based on the flag
	config.Containerized = lk.Containerized

	config.AllowPrivileged = true
	config.Config = "/etc/kubernetes/manifests"

	// Networking
	config.ClusterDomain = lk.DNSDomain
	config.ClusterDNS = lk.DNSIP.String()

	config.NodeIP = lk.NodeIP.String()

	// Use the host's resolver config
	if lk.Containerized {
		config.ResolverConfig = "/rootfs/etc/resolv.conf"
	} else {
		config.ResolverConfig = "/etc/resolv.conf"
	}

	return func() error {
		return kubelet.Run(config, nil)
	}
}

func NewStatusUpdater(client *clientset.Clientset, relistPeriod time.Duration, nowFunc func() time.Time) *StatusUpdater {
	kubecfg := options.NewKubeletServer() // only create to get the config, this is without side-effects
	return &StatusUpdater{
		client:          client,
		relistPeriod:    relistPeriod,
		heartBeatPeriod: kubecfg.NodeStatusUpdateFrequency.Duration,
		nowFunc:         nowFunc,
	}
}

func TestBuildCloudProviderNone(t *testing.T) {
	server := kubeletoptions.NewKubeletServer()
	server.CloudProvider = ""
	cloud, err := buildCloudProvider(server)
	if err != nil {
		t.Errorf("buildCloudProvider failed: %v", err)
	}
	if cloud != nil {
		t.Errorf("buildCloudProvider returned cloud provider %q where nil was expected", cloud.ProviderName())
	}
}

func TestBuildCloudProviderError(t *testing.T) {
	server := kubeletoptions.NewKubeletServer()
	server.CloudProvider = "unknown-provider-name"
	cloud, err := buildCloudProvider(server)
	if err == nil {
		t.Errorf("buildCloudProvider returned no error when one was expected")
	}
	if cloud != nil {
		t.Errorf("buildCloudProvider returned cloud provider %q where nil was expected", cloud.ProviderName())
	}
}

func NewKubeletExecutorServer() *KubeletExecutorServer {
	k := &KubeletExecutorServer{
		KubeletServer:     options.NewKubeletServer(),
		SuicideTimeout:    config.DefaultSuicideTimeout,
		LaunchGracePeriod: config.DefaultLaunchGracePeriod,
	}
	if pwd, err := os.Getwd(); err != nil {
		log.Warningf("failed to determine current directory: %v", err)
	} else {
		k.RootDirectory = pwd // mesos sandbox dir
	}
	k.Address = defaultBindingAddress()

	return k
}

func main() {
	s := options.NewKubeletServer()
	s.AddFlags(pflag.CommandLine)

	flag.InitFlags()
	logs.InitLogs()
	defer logs.FlushLogs()

	verflag.PrintAndExitIfRequested()

	if err := app.Run(s, nil); err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}
}

func Test_nodeWithUpdatedStatus(t *testing.T) {
	now := time.Now()
	testNode := func(d time.Duration, s api.ConditionStatus, r string) *api.Node {
		return &api.Node{
			Status: api.NodeStatus{
				Conditions: []api.NodeCondition{{
					Type: api.NodeOutOfDisk,
				}, {
					Type:               api.NodeReady,
					Status:             s,
					Reason:             r,
					Message:            "some message we don't care about here",
					LastTransitionTime: unversioned.Time{now.Add(-time.Minute)},
					LastHeartbeatTime:  unversioned.Time{now.Add(d)},
				}},
			},
		}
	}

	cm := cmoptions.NewCMServer()
	kubecfg := kubeletoptions.NewKubeletServer()
	assert.True(t, kubecfg.NodeStatusUpdateFrequency.Duration*3 < cm.NodeControllerOptions.NodeMonitorGracePeriod) // sanity check for defaults

	n := testNode(0, api.ConditionTrue, "KubeletReady")
	su := NewStatusUpdater(nil, cm.NodeControllerOptions.NodeMonitorPeriod, func() time.Time { return now })
	_, updated, err := su.nodeWithUpdatedStatus(n)
	assert.NoError(t, err)
	assert.False(t, updated, "no update expected b/c kubelet updated heartbeat just now")

	n = testNode(-cm.NodeControllerOptions.NodeMonitorGracePeriod, api.ConditionTrue, "KubeletReady")
	n2, updated, err := su.nodeWithUpdatedStatus(n)
	assert.NoError(t, err)
	assert.True(t, updated, "update expected b/c kubelet's update is older than DefaultNodeMonitorGracePeriod")
	assert.Equal(t, getCondition(&n2.Status, api.NodeReady).Reason, slaveReadyReason)
	assert.Equal(t, getCondition(&n2.Status, api.NodeReady).Message, slaveReadyMessage)

	n = testNode(-kubecfg.NodeStatusUpdateFrequency.Duration, api.ConditionTrue, "KubeletReady")
	n2, updated, err = su.nodeWithUpdatedStatus(n)
	assert.NoError(t, err)
	assert.False(t, updated, "no update expected b/c kubelet's update was missed only once")

	n = testNode(-kubecfg.NodeStatusUpdateFrequency.Duration*3, api.ConditionTrue, "KubeletReady")
	n2, updated, err = su.nodeWithUpdatedStatus(n)
	assert.NoError(t, err)
	assert.True(t, updated, "update expected b/c kubelet's update is older than 3*DefaultNodeStatusUpdateFrequency")
	assert.Equal(t, getCondition(&n2.Status, api.NodeReady).Reason, slaveReadyReason)
	assert.Equal(t, getCondition(&n2.Status, api.NodeReady).Message, slaveReadyMessage)
}

func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	s := options.NewKubeletServer()
	s.AddFlags(pflag.CommandLine)

	flag.InitFlags()
	util.InitLogs()
	defer util.FlushLogs()

	verflag.PrintAndExitIfRequested()

	if err := app.Run(s, nil); err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
		os.Exit(1)
	}
}

// NewKubelet creates a new hyperkube Server object that includes the
// description and flags.
func NewKubelet() *Server {
	s := options.NewKubeletServer()
	hks := Server{
		SimpleUsage: "kubelet",
		Long: `The kubelet binary is responsible for maintaining a set of containers on a
		particular node. It syncs data from a variety of sources including a
		Kubernetes API server, an etcd cluster, HTTP endpoint or local file. It then
		queries Docker to see what is currently running.  It synchronizes the
		configuration data, with the running set of containers by starting or stopping
		Docker containers.`,
		Run: func(_ *Server, _ []string) error {
			return app.Run(s, nil)
		},
	}
	s.AddFlags(hks.Flags())
	return &hks
}

func TestBuildCloudProviderFake(t *testing.T) {
	providerName := "fake"
	cloudprovider.RegisterCloudProvider(providerName, func(config io.Reader) (cloudprovider.Interface, error) {
		return &fake.FakeCloud{}, nil
	})

	server := kubeletoptions.NewKubeletServer()
	server.CloudProvider = providerName

	cloud, err := buildCloudProvider(server)
	if err != nil {
		t.Errorf("buildCloudProvider failed: %v", err)
	}
	if cloud == nil {
		t.Errorf("buildCloudProvider returned nil cloud provider")
	} else {
		if cloud.ProviderName() != providerName {
			t.Errorf("Invalid cloud provider returned, expected %q, got %q", providerName, cloud.ProviderName())
		}
	}
}

func BuildKubernetesNodeConfig(options configapi.NodeConfig) (*NodeConfig, error) {
	originClient, osClientConfig, err := configapi.GetOpenShiftClient(options.MasterKubeConfig)
	if err != nil {
		return nil, err
	}
	kubeClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig)
	if err != nil {
		return nil, err
	}
	// Make a separate client for event reporting, to avoid event QPS blocking node calls
	eventClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig)
	if err != nil {
		return nil, err
	}

	if options.NodeName == "localhost" {
		glog.Warningf(`Using "localhost" as node name will not resolve from all locations`)
	}

	clientCAs, err := kcrypto.CertPoolFromFile(options.ServingInfo.ClientCA)
	if err != nil {
		return nil, err
	}

	imageTemplate := variable.NewDefaultImageTemplate()
	imageTemplate.Format = options.ImageConfig.Format
	imageTemplate.Latest = options.ImageConfig.Latest

	var path string
	var fileCheckInterval int64
	if options.PodManifestConfig != nil {
		path = options.PodManifestConfig.Path
		fileCheckInterval = options.PodManifestConfig.FileCheckIntervalSeconds
	}

	var dockerExecHandler dockertools.ExecHandler

	switch options.DockerConfig.ExecHandlerName {
	case configapi.DockerExecHandlerNative:
		dockerExecHandler = &dockertools.NativeExecHandler{}
	case configapi.DockerExecHandlerNsenter:
		dockerExecHandler = &dockertools.NsenterExecHandler{}
	}

	kubeAddressStr, kubePortStr, err := net.SplitHostPort(options.ServingInfo.BindAddress)
	if err != nil {
		return nil, fmt.Errorf("cannot parse node address: %v", err)
	}
	kubePort, err := strconv.Atoi(kubePortStr)
	if err != nil {
		return nil, fmt.Errorf("cannot parse node port: %v", err)
	}

	// Defaults are tested in TestKubeletDefaults
	server := kubeletoptions.NewKubeletServer()
	// Adjust defaults
	server.Config = path
	server.RootDirectory = options.VolumeDirectory
	server.NodeIP = options.NodeIP
	server.HostnameOverride = options.NodeName
	server.AllowPrivileged = true
	server.RegisterNode = true
	server.Address = kubeAddressStr
	server.Port = uint(kubePort)
	server.ReadOnlyPort = 0        // no read only access
	server.CAdvisorPort = 0        // no unsecured cadvisor access
	server.HealthzPort = 0         // no unsecured healthz access
	server.HealthzBindAddress = "" // no unsecured healthz access
	server.ClusterDNS = options.DNSIP
	server.ClusterDomain = options.DNSDomain
	server.NetworkPluginName = options.NetworkConfig.NetworkPluginName
	server.HostNetworkSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
	server.HostPIDSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
	server.HostIPCSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
	server.HTTPCheckFrequency = unversioned.Duration{Duration: time.Duration(0)} // no remote HTTP pod creation access
	server.FileCheckFrequency = unversioned.Duration{Duration: time.Duration(fileCheckInterval) * time.Second}
	server.PodInfraContainerImage = imageTemplate.ExpandOrDie("pod")
	server.CPUCFSQuota = true // enable cpu cfs quota enforcement by default
	server.MaxPods = 110
	server.SerializeImagePulls = false // disable serial image pulls by default

	switch server.NetworkPluginName {
	case ovs.SingleTenantPluginName, ovs.MultiTenantPluginName:
		// set defaults for openshift-sdn
		server.HairpinMode = componentconfig.HairpinNone
		server.ConfigureCBR0 = false
	}

	// prevents kube from generating certs
	server.TLSCertFile = options.ServingInfo.ServerCert.CertFile
	server.TLSPrivateKeyFile = options.ServingInfo.ServerCert.KeyFile

	containerized := cmdutil.Env("OPENSHIFT_CONTAINERIZED", "") == "true"
	server.Containerized = containerized

	// resolve extended arguments
	// TODO: this should be done in config validation (along with the above) so we can provide
	// proper errors
	if err := cmdflags.Resolve(options.KubeletArguments, server.AddFlags); len(err) > 0 {
		return nil, kerrors.NewAggregate(err)
//.........這裏部分代碼省略.........

func ValidateKubeletExtendedArguments(config api.ExtendedArguments, fldPath *field.Path) field.ErrorList {
	return ValidateExtendedArguments(config, kubeletoptions.NewKubeletServer().AddFlags, fldPath)
}

func TestKubeletDefaults(t *testing.T) {
	defaults := kubeletoptions.NewKubeletServer()

	// This is a snapshot of the default config
	// If the default changes (new fields are added, or default values change), we want to know
	// Once we've reacted to the changes appropriately in BuildKubernetesNodeConfig(), update this expected default to match the new upstream defaults
	expectedDefaults := &kubeletoptions.KubeletServer{
		AuthPath:   util.NewStringFlag(""),
		KubeConfig: util.NewStringFlag("/var/lib/kubelet/kubeconfig"),

		KubeletConfiguration: componentconfig.KubeletConfiguration{
			Address:                     "0.0.0.0", // overridden
			AllowPrivileged:             false,     // overridden
			CAdvisorPort:                4194,      // disabled
			VolumeStatsAggPeriod:        unversioned.Duration{Duration: time.Minute},
			CertDirectory:               "/var/run/kubernetes",
			CgroupRoot:                  "",
			ClusterDNS:                  "", // overridden
			ClusterDomain:               "", // overridden
			ConfigureCBR0:               false,
			ContainerRuntime:            "docker",
			Containerized:               false, // overridden based on OPENSHIFT_CONTAINERIZED
			CPUCFSQuota:                 true,  // forced to true
			DockerExecHandlerName:       "native",
			DockerEndpoint:              "unix:///var/run/docker.sock",
			EventBurst:                  10,
			EventRecordQPS:              5.0,
			EnableCustomMetrics:         false,
			EnableDebuggingHandlers:     true,
			EnableServer:                true,
			EvictionHard:                "memory.available<100Mi",
			FileCheckFrequency:          unversioned.Duration{Duration: 20 * time.Second}, // overridden
			HealthzBindAddress:          "127.0.0.1",                                      // disabled
			HealthzPort:                 10248,                                            // disabled
			HostNetworkSources:          []string{"*"},                                    // overridden
			HostPIDSources:              []string{"*"},                                    // overridden
			HostIPCSources:              []string{"*"},                                    // overridden
			HTTPCheckFrequency:          unversioned.Duration{Duration: 20 * time.Second}, // disabled
			ImageMinimumGCAge:           unversioned.Duration{Duration: 120 * time.Second},
			ImageGCHighThresholdPercent: 90,
			ImageGCLowThresholdPercent:  80,
			IPTablesMasqueradeBit:       14,
			IPTablesDropBit:             15,
			LowDiskSpaceThresholdMB:     256,
			MakeIPTablesUtilChains:      true,
			MasterServiceNamespace:      "default",
			MaxContainerCount:           -1,
			MaxPerPodContainerCount:     1,
			MaxOpenFiles:                1000000,
			MaxPods:                     110, // overridden
			MinimumGCAge:                unversioned.Duration{},
			NetworkPluginDir:            "",
			NetworkPluginName:           "", // overridden
			NonMasqueradeCIDR:           "10.0.0.0/8",
			VolumePluginDir:             "/usr/libexec/kubernetes/kubelet-plugins/volume/exec/",
			NodeStatusUpdateFrequency:   unversioned.Duration{Duration: 10 * time.Second},
			NodeLabels:                  nil,
			OOMScoreAdj:                 -999,
			LockFilePath:                "",
			PodInfraContainerImage:      "gcr.io/google_containers/pause-amd64:3.0", // overridden
			Port:                           10250, // overridden
			ReadOnlyPort:                   10255, // disabled
			RegisterNode:                   true,
			RegisterSchedulable:            true,
			RegistryBurst:                  10,
			RegistryPullQPS:                5.0,
			ResolverConfig:                 kubetypes.ResolvConfDefault,
			KubeletCgroups:                 "",
			RktAPIEndpoint:                 rkt.DefaultRktAPIServiceEndpoint,
			RktPath:                        "",
			RktStage1Image:                 "",
			RootDirectory:                  "/var/lib/kubelet", // overridden
			RuntimeCgroups:                 "",
			SerializeImagePulls:            true,
			StreamingConnectionIdleTimeout: unversioned.Duration{Duration: 4 * time.Hour},
			SyncFrequency:                  unversioned.Duration{Duration: 1 * time.Minute},
			SystemCgroups:                  "",
			TLSCertFile:                    "", // overridden to prevent cert generation
			TLSPrivateKeyFile:              "", // overridden to prevent cert generation
			ReconcileCIDR:                  true,
			KubeAPIQPS:                     5.0,
			KubeAPIBurst:                   10,
			ExperimentalFlannelOverlay:     false,
			OutOfDiskTransitionFrequency:   unversioned.Duration{Duration: 5 * time.Minute},
			HairpinMode:                    "promiscuous-bridge",
			BabysitDaemons:                 false,
			SeccompProfileRoot:             "",
			CloudProvider:                  "auto-detect",
			RuntimeRequestTimeout:          unversioned.Duration{Duration: 2 * time.Minute},
			ContentType:                    "application/vnd.kubernetes.protobuf",
			EnableControllerAttachDetach:   true,

			EvictionPressureTransitionPeriod: unversioned.Duration{Duration: 5 * time.Minute},

			SystemReserved: utilconfig.ConfigurationMap{},
			KubeReserved:   utilconfig.ConfigurationMap{},
		},
	}

	if !reflect.DeepEqual(defaults, expectedDefaults) {
//.........這裏部分代碼省略.........