Golang chown.New函数代码示例

// SetVolumeOwnership modifies the given volume to be owned by
// fsGroup, and sets SetGid so that newly created files are owned by
// fsGroup. If fsGroup is nil nothing is done.
func SetVolumeOwnership(mounter Mounter, fsGroup *int64) error {

	if fsGroup == nil {
		return nil
	}

	chownRunner := chown.New()
	chmodRunner := chmod.New()
	return filepath.Walk(mounter.GetPath(), func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		// chown and chmod pass through to the underlying file for symlinks.
		// Symlinks have a mode of 777 but this really doesn't mean anything.
		// The permissions of the underlying file are what matter.
		// However, if one reads the mode of a symlink then chmods the symlink
		// with that mode, it changes the mode of the underlying file, overridden
		// the defaultMode and permissions initialized by the volume plugin, which
		// is not what we want; thus, we skip chown/chmod for symlinks.
		if info.Mode()&os.ModeSymlink != 0 {
			return nil
		}

		stat, ok := info.Sys().(*syscall.Stat_t)
		if !ok {
			return nil
		}

		if stat == nil {
			glog.Errorf("Got nil stat_t for path %v while setting ownership of volume", path)
			return nil
		}

		err = chownRunner.Chown(path, int(stat.Uid), int(*fsGroup))
		if err != nil {
			glog.Errorf("Chown failed on %v: %v", path, err)
		}

		mask := rwMask
		if mounter.GetAttributes().ReadOnly {
			mask = roMask
		}

		if info.IsDir() {
			mask |= os.ModeSetgid
		}

		err = chmodRunner.Chmod(path, info.Mode()|mask)
		if err != nil {
			glog.Errorf("Chmod failed on %v: %v", path, err)
		}

		return nil
	})
}

// SetVolumeOwnership modifies the given volume to be owned by
// fsGroup, and sets SetGid so that newly created files are owned by
// fsGroup. If fsGroup is nil nothing is done.
func SetVolumeOwnership(mounter Mounter, fsGroup *int64) error {

	if fsGroup == nil {
		return nil
	}

	chownRunner := chown.New()
	chmodRunner := chmod.New()
	return filepath.Walk(mounter.GetPath(), func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		stat, ok := info.Sys().(*syscall.Stat_t)
		if !ok {
			return nil
		}

		if stat == nil {
			glog.Errorf("Got nil stat_t for path %v while setting ownership of volume", path)
			return nil
		}

		err = chownRunner.Chown(path, int(stat.Uid), int(*fsGroup))
		if err != nil {
			glog.Errorf("Chown failed on %v: %v", path, err)
		}

		mask := rwMask
		if mounter.GetAttributes().ReadOnly {
			mask = roMask
		}

		if info.IsDir() {
			mask |= os.ModeSetgid
		}

		err = chmodRunner.Chmod(path, info.Mode()|mask)
		if err != nil {
			glog.Errorf("Chmod failed on %v: %v", path, err)
		}

		return nil
	})
}

// SimpleRunKubelet is a simple way to start a Kubelet talking to dockerEndpoint, using an API Client.
// Under the hood it calls RunKubelet (below)
func SimpleKubelet(client *client.Client,
	dockerClient dockertools.DockerInterface,
	hostname, rootDir, manifestURL, address string,
	port uint,
	readOnlyPort uint,
	masterServiceNamespace string,
	volumePlugins []volume.VolumePlugin,
	tlsOptions *server.TLSOptions,
	cadvisorInterface cadvisor.Interface,
	configFilePath string,
	cloud cloudprovider.Interface,
	osInterface kubecontainer.OSInterface,
	fileCheckFrequency, httpCheckFrequency, minimumGCAge, nodeStatusUpdateFrequency, syncFrequency, outOfDiskTransitionFrequency time.Duration,
	maxPods int,
	containerManager cm.ContainerManager, clusterDNS net.IP) *KubeletConfig {
	imageGCPolicy := kubelet.ImageGCPolicy{
		HighThresholdPercent: 90,
		LowThresholdPercent:  80,
	}
	diskSpacePolicy := kubelet.DiskSpacePolicy{
		DockerFreeDiskMB: 256,
		RootFreeDiskMB:   256,
	}

	kcfg := KubeletConfig{
		Address:                   net.ParseIP(address),
		CAdvisorInterface:         cadvisorInterface,
		CgroupRoot:                "",
		Cloud:                     cloud,
		ClusterDNS:                clusterDNS,
		ConfigFile:                configFilePath,
		ContainerManager:          containerManager,
		ContainerRuntime:          "docker",
		CPUCFSQuota:               false,
		DiskSpacePolicy:           diskSpacePolicy,
		DockerClient:              dockerClient,
		DockerDaemonContainer:     "/docker-daemon",
		DockerExecHandler:         &dockertools.NativeExecHandler{},
		EnableDebuggingHandlers:   true,
		EnableServer:              true,
		FileCheckFrequency:        fileCheckFrequency,
		HostnameOverride:          hostname,
		HTTPCheckFrequency:        httpCheckFrequency,
		ImageGCPolicy:             imageGCPolicy,
		KubeClient:                client,
		ManifestURL:               manifestURL,
		MasterServiceNamespace:    masterServiceNamespace,
		MaxContainerCount:         100,
		MaxOpenFiles:              1024,
		MaxPerPodContainerCount:   2,
		MaxPods:                   maxPods,
		MinimumGCAge:              minimumGCAge,
		Mounter:                   mount.New(),
		ChownRunner:               chown.New(),
		ChmodRunner:               chmod.New(),
		NodeStatusUpdateFrequency: nodeStatusUpdateFrequency,
		OOMAdjuster:               oom.NewFakeOOMAdjuster(),
		OSInterface:               osInterface,
		PodInfraContainerImage:    kubetypes.PodInfraContainerImage,
		Port:                port,
		ReadOnlyPort:        readOnlyPort,
		RegisterNode:        true,
		RegisterSchedulable: true,
		RegistryBurst:       10,
		RegistryPullQPS:     5.0,
		ResolverConfig:      kubetypes.ResolvConfDefault,
		ResourceContainer:   "/kubelet",
		RootDirectory:       rootDir,
		SerializeImagePulls: true,
		SyncFrequency:       syncFrequency,
		SystemContainer:     "",
		TLSOptions:          tlsOptions,
		VolumePlugins:       volumePlugins,
		Writer:              &io.StdWriter{},
		OutOfDiskTransitionFrequency: outOfDiskTransitionFrequency,
	}
	return &kcfg
}

// UnsecuredKubeletConfig returns a KubeletConfig suitable for being run, or an error if the server setup
// is not valid.  It will not start any background processes, and does not include authentication/authorization
func UnsecuredKubeletConfig(s *options.KubeletServer) (*KubeletConfig, error) {
	hostNetworkSources, err := kubetypes.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
	if err != nil {
		return nil, err
	}

	hostPIDSources, err := kubetypes.GetValidatedSources(strings.Split(s.HostPIDSources, ","))
	if err != nil {
		return nil, err
	}

	hostIPCSources, err := kubetypes.GetValidatedSources(strings.Split(s.HostIPCSources, ","))
	if err != nil {
		return nil, err
	}

	mounter := mount.New()
	var writer io.Writer = &io.StdWriter{}
	if s.Containerized {
		glog.V(2).Info("Running kubelet in containerized mode (experimental)")
		mounter = mount.NewNsenterMounter()
		writer = &io.NsenterWriter{}
	}

	chmodRunner := chmod.New()
	chownRunner := chown.New()

	tlsOptions, err := InitializeTLS(s)
	if err != nil {
		return nil, err
	}

	var dockerExecHandler dockertools.ExecHandler
	switch s.DockerExecHandlerName {
	case "native":
		dockerExecHandler = &dockertools.NativeExecHandler{}
	case "nsenter":
		dockerExecHandler = &dockertools.NsenterExecHandler{}
	default:
		glog.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
		dockerExecHandler = &dockertools.NativeExecHandler{}
	}

	imageGCPolicy := kubelet.ImageGCPolicy{
		HighThresholdPercent: s.ImageGCHighThresholdPercent,
		LowThresholdPercent:  s.ImageGCLowThresholdPercent,
	}

	diskSpacePolicy := kubelet.DiskSpacePolicy{
		DockerFreeDiskMB: s.LowDiskSpaceThresholdMB,
		RootFreeDiskMB:   s.LowDiskSpaceThresholdMB,
	}

	manifestURLHeader := make(http.Header)
	if s.ManifestURLHeader != "" {
		pieces := strings.Split(s.ManifestURLHeader, ":")
		if len(pieces) != 2 {
			return nil, fmt.Errorf("manifest-url-header must have a single ':' key-value separator, got %q", s.ManifestURLHeader)
		}
		manifestURLHeader.Set(pieces[0], pieces[1])
	}

	reservation, err := parseReservation(s.KubeReserved, s.SystemReserved)
	if err != nil {
		return nil, err
	}

	return &KubeletConfig{
		Address:                   s.Address,
		AllowPrivileged:           s.AllowPrivileged,
		Auth:                      nil, // default does not enforce auth[nz]
		CAdvisorInterface:         nil, // launches background processes, not set here
		CgroupRoot:                s.CgroupRoot,
		Cloud:                     nil, // cloud provider might start background processes
		ClusterDNS:                s.ClusterDNS,
		ClusterDomain:             s.ClusterDomain,
		ConfigFile:                s.Config,
		ConfigureCBR0:             s.ConfigureCBR0,
		ContainerManager:          nil,
		ContainerRuntime:          s.ContainerRuntime,
		CPUCFSQuota:               s.CPUCFSQuota,
		DiskSpacePolicy:           diskSpacePolicy,
		DockerClient:              dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
		DockerDaemonContainer:     s.DockerDaemonContainer,
		DockerExecHandler:         dockerExecHandler,
		EnableDebuggingHandlers:   s.EnableDebuggingHandlers,
		EnableServer:              s.EnableServer,
		EventBurst:                s.EventBurst,
		EventRecordQPS:            s.EventRecordQPS,
		FileCheckFrequency:        s.FileCheckFrequency,
		HostnameOverride:          s.HostnameOverride,
		HostNetworkSources:        hostNetworkSources,
		HostPIDSources:            hostPIDSources,
		HostIPCSources:            hostIPCSources,
		HTTPCheckFrequency:        s.HTTPCheckFrequency,
		ImageGCPolicy:             imageGCPolicy,
		KubeClient:                nil,
		ManifestURL:               s.ManifestURL,
//.........这里部分代码省略.........