Golang layer.GetLayerPath函数代码示例

func (daemon *Daemon) getLibcontainerdCreateOptions(container *container.Container) (*[]libcontainerd.CreateOption, error) {
	createOptions := []libcontainerd.CreateOption{}

	// Are we going to run as a Hyper-V container?
	hvOpts := &libcontainerd.HyperVIsolationOption{}
	if container.HostConfig.Isolation.IsDefault() {
		// Container is set to use the default, so take the default from the daemon configuration
		hvOpts.IsHyperV = daemon.defaultIsolation.IsHyperV()
	} else {
		// Container is requesting an isolation mode. Honour it.
		hvOpts.IsHyperV = container.HostConfig.Isolation.IsHyperV()
	}

	// Generate the layer folder of the layer options
	layerOpts := &libcontainerd.LayerOption{}
	m, err := container.RWLayer.Metadata()
	if err != nil {
		return nil, fmt.Errorf("failed to get layer metadata - %s", err)
	}
	if hvOpts.IsHyperV {
		hvOpts.SandboxPath = filepath.Dir(m["dir"])
	} else {
		layerOpts.LayerFolderPath = m["dir"]
	}

	// Generate the layer paths of the layer options
	img, err := daemon.imageStore.Get(container.ImageID)
	if err != nil {
		return nil, fmt.Errorf("failed to graph.Get on ImageID %s - %s", container.ImageID, err)
	}
	// Get the layer path for each layer.
	max := len(img.RootFS.DiffIDs)
	for i := 1; i <= max; i++ {
		img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
		layerPath, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
		if err != nil {
			return nil, fmt.Errorf("failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err)
		}
		// Reverse order, expecting parent most first
		layerOpts.LayerPaths = append([]string{layerPath}, layerOpts.LayerPaths...)
	}

	// Now build the full set of options
	createOptions = append(createOptions, &libcontainerd.FlushOption{IgnoreFlushesDuringBoot: !container.HasBeenStartedBefore})
	createOptions = append(createOptions, hvOpts)
	createOptions = append(createOptions, layerOpts)

	return &createOptions, nil
}

func (daemon *Daemon) createSpec(c *container.Container) (*libcontainerd.Spec, error) {
	s := oci.DefaultSpec()

	linkedEnv, err := daemon.setupLinkedContainers(c)
	if err != nil {
		return nil, err
	}

	// TODO Windows - this can be removed. Not used (UID/GID)
	rootUID, rootGID := daemon.GetRemappedUIDGID()
	if err := c.SetupWorkingDirectory(rootUID, rootGID); err != nil {
		return nil, err
	}

	img, err := daemon.imageStore.Get(c.ImageID)
	if err != nil {
		return nil, fmt.Errorf("Failed to graph.Get on ImageID %s - %s", c.ImageID, err)
	}

	// In base spec
	s.Hostname = c.FullHostname()

	// In s.Mounts
	mounts, err := daemon.setupMounts(c)
	if err != nil {
		return nil, err
	}
	for _, mount := range mounts {
		s.Mounts = append(s.Mounts, windowsoci.Mount{
			Source:      mount.Source,
			Destination: mount.Destination,
			Readonly:    !mount.Writable,
		})
	}

	// In s.Process
	s.Process.Args = append([]string{c.Path}, c.Args...)
	if !c.Config.ArgsEscaped {
		s.Process.Args = escapeArgs(s.Process.Args)
	}
	s.Process.Cwd = c.Config.WorkingDir
	s.Process.Env = c.CreateDaemonEnvironment(linkedEnv)
	s.Process.InitialConsoleSize = c.HostConfig.ConsoleSize
	s.Process.Terminal = c.Config.Tty
	s.Process.User.User = c.Config.User

	// In spec.Root
	s.Root.Path = c.BaseFS
	s.Root.Readonly = c.HostConfig.ReadonlyRootfs

	// In s.Windows
	s.Windows.FirstStart = !c.HasBeenStartedBefore

	// s.Windows.LayerFolder.
	m, err := c.RWLayer.Metadata()
	if err != nil {
		return nil, fmt.Errorf("Failed to get layer metadata - %s", err)
	}
	s.Windows.LayerFolder = m["dir"]

	// s.Windows.LayerPaths
	var layerPaths []string
	if img.RootFS != nil && (img.RootFS.Type == image.TypeLayers || img.RootFS.Type == image.TypeLayersWithBase) {
		// Get the layer path for each layer.
		start := 1
		if img.RootFS.Type == image.TypeLayersWithBase {
			// Include an empty slice to get the base layer ID.
			start = 0
		}
		max := len(img.RootFS.DiffIDs)
		for i := start; i <= max; i++ {
			img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
			path, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
			if err != nil {
				return nil, fmt.Errorf("Failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err)
			}
			// Reverse order, expecting parent most first
			layerPaths = append([]string{path}, layerPaths...)
		}
	}
	s.Windows.LayerPaths = layerPaths

	// Are we going to run as a Hyper-V container?
	hv := false
	if c.HostConfig.Isolation.IsDefault() {
		// Container is set to use the default, so take the default from the daemon configuration
		hv = daemon.defaultIsolation.IsHyperV()
	} else {
		// Container is requesting an isolation mode. Honour it.
		hv = c.HostConfig.Isolation.IsHyperV()
	}
	if hv {
		hvr := &windowsoci.HvRuntime{}
		if img.RootFS != nil && img.RootFS.Type == image.TypeLayers {
			// For TP5, the utility VM is part of the base layer.
			// TODO-jstarks: Add support for separate utility VM images
			// once it is decided how they can be stored.
			uvmpath := filepath.Join(layerPaths[len(layerPaths)-1], "UtilityVM")
			_, err = os.Stat(uvmpath)
			if err != nil {
//.........这里部分代码省略.........

func (daemon *Daemon) populateCommand(c *container.Container, env []string) error {
	en := &execdriver.Network{
		Interface: nil,
	}

	parts := strings.SplitN(string(c.HostConfig.NetworkMode), ":", 2)
	switch parts[0] {
	case "none":
	case "default", "": // empty string to support existing containers
		if !c.Config.NetworkDisabled {
			en.Interface = &execdriver.NetworkInterface{
				MacAddress:   c.Config.MacAddress,
				Bridge:       daemon.configStore.bridgeConfig.VirtualSwitchName,
				PortBindings: c.HostConfig.PortBindings,

				// TODO Windows. Include IPAddress. There already is a
				// property IPAddress on execDrive.CommonNetworkInterface,
				// but there is no CLI option in docker to pass through
				// an IPAddress on docker run.
			}
		}
	default:
		return derr.ErrorCodeInvalidNetworkMode.WithArgs(c.HostConfig.NetworkMode)
	}

	// TODO Windows. More resource controls to be implemented later.
	resources := &execdriver.Resources{
		CommonResources: execdriver.CommonResources{
			CPUShares: c.HostConfig.CPUShares,
		},
	}

	processConfig := execdriver.ProcessConfig{
		CommonProcessConfig: execdriver.CommonProcessConfig{
			Entrypoint: c.Path,
			Arguments:  c.Args,
			Tty:        c.Config.Tty,
		},
		ConsoleSize: c.HostConfig.ConsoleSize,
	}

	processConfig.Env = env

	var layerPaths []string
	img, err := daemon.imageStore.Get(c.ImageID)
	if err != nil {
		return derr.ErrorCodeGetGraph.WithArgs(c.ImageID, err)
	}

	if img.RootFS != nil && img.RootFS.Type == "layers+base" {
		max := len(img.RootFS.DiffIDs)
		for i := 0; i <= max; i++ {
			img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
			path, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
			if err != nil {
				return derr.ErrorCodeGetLayer.WithArgs(err)
			}
			// Reverse order, expecting parent most first
			layerPaths = append([]string{path}, layerPaths...)
		}
	}

	m, err := c.RWLayer.Metadata()
	if err != nil {
		return derr.ErrorCodeGetLayerMetadata.WithArgs(err)
	}
	layerFolder := m["dir"]

	var hvPartition bool
	// Work out the isolation (whether it is a hypervisor partition)
	if c.HostConfig.Isolation.IsDefault() {
		// Not specified by caller. Take daemon default
		hvPartition = windows.DefaultIsolation.IsHyperV()
	} else {
		// Take value specified by caller
		hvPartition = c.HostConfig.Isolation.IsHyperV()
	}

	c.Command = &execdriver.Command{
		CommonCommand: execdriver.CommonCommand{
			ID:            c.ID,
			Rootfs:        c.BaseFS,
			WorkingDir:    c.Config.WorkingDir,
			Network:       en,
			MountLabel:    c.GetMountLabel(),
			Resources:     resources,
			ProcessConfig: processConfig,
			ProcessLabel:  c.GetProcessLabel(),
		},
		FirstStart:  !c.HasBeenStartedBefore,
		LayerFolder: layerFolder,
		LayerPaths:  layerPaths,
		Hostname:    c.Config.Hostname,
		Isolation:   string(c.HostConfig.Isolation),
		ArgsEscaped: c.Config.ArgsEscaped,
		HvPartition: hvPartition,
	}

	return nil
}

func (daemon *Daemon) getLibcontainerdCreateOptions(container *container.Container) (*[]libcontainerd.CreateOption, error) {
	createOptions := []libcontainerd.CreateOption{}

	// Are we going to run as a Hyper-V container?
	hvOpts := &libcontainerd.HyperVIsolationOption{}
	if container.HostConfig.Isolation.IsDefault() {
		// Container is set to use the default, so take the default from the daemon configuration
		hvOpts.IsHyperV = daemon.defaultIsolation.IsHyperV()
	} else {
		// Container is requesting an isolation mode. Honour it.
		hvOpts.IsHyperV = container.HostConfig.Isolation.IsHyperV()
	}

	// Generate the layer folder of the layer options
	layerOpts := &libcontainerd.LayerOption{}
	m, err := container.RWLayer.Metadata()
	if err != nil {
		return nil, fmt.Errorf("failed to get layer metadata - %s", err)
	}
	if hvOpts.IsHyperV {
		hvOpts.SandboxPath = filepath.Dir(m["dir"])
	}

	layerOpts.LayerFolderPath = m["dir"]

	// Generate the layer paths of the layer options
	img, err := daemon.imageStore.Get(container.ImageID)
	if err != nil {
		return nil, fmt.Errorf("failed to graph.Get on ImageID %s - %s", container.ImageID, err)
	}
	// Get the layer path for each layer.
	max := len(img.RootFS.DiffIDs)
	for i := 1; i <= max; i++ {
		img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
		layerPath, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
		if err != nil {
			return nil, fmt.Errorf("failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err)
		}
		// Reverse order, expecting parent most first
		layerOpts.LayerPaths = append([]string{layerPath}, layerOpts.LayerPaths...)
	}

	// Get endpoints for the libnetwork allocated networks to the container
	var epList []string
	AllowUnqualifiedDNSQuery := false
	if container.NetworkSettings != nil {
		for n := range container.NetworkSettings.Networks {
			sn, err := daemon.FindNetwork(n)
			if err != nil {
				continue
			}

			ep, err := container.GetEndpointInNetwork(sn)
			if err != nil {
				continue
			}

			data, err := ep.DriverInfo()
			if err != nil {
				continue
			}
			if data["hnsid"] != nil {
				epList = append(epList, data["hnsid"].(string))
			}

			if data["AllowUnqualifiedDNSQuery"] != nil {
				AllowUnqualifiedDNSQuery = true
			}
		}
	}

	// Now build the full set of options
	createOptions = append(createOptions, &libcontainerd.FlushOption{IgnoreFlushesDuringBoot: !container.HasBeenStartedBefore})
	createOptions = append(createOptions, hvOpts)
	createOptions = append(createOptions, layerOpts)
	if epList != nil {
		createOptions = append(createOptions, &libcontainerd.NetworkEndpointsOption{Endpoints: epList, AllowUnqualifiedDNSQuery: AllowUnqualifiedDNSQuery})
	}

	return &createOptions, nil
}

func (daemon *Daemon) getLibcontainerdCreateOptions(container *container.Container) ([]libcontainerd.CreateOption, error) {
	createOptions := []libcontainerd.CreateOption{}

	// Are we going to run as a Hyper-V container?
	hvOpts := &libcontainerd.HyperVIsolationOption{}
	if container.HostConfig.Isolation.IsDefault() {
		// Container is set to use the default, so take the default from the daemon configuration
		hvOpts.IsHyperV = daemon.defaultIsolation.IsHyperV()
	} else {
		// Container is requesting an isolation mode. Honour it.
		hvOpts.IsHyperV = container.HostConfig.Isolation.IsHyperV()
	}

	// Generate the layer folder of the layer options
	layerOpts := &libcontainerd.LayerOption{}
	m, err := container.RWLayer.Metadata()
	if err != nil {
		return nil, fmt.Errorf("failed to get layer metadata - %s", err)
	}
	if hvOpts.IsHyperV {
		hvOpts.SandboxPath = filepath.Dir(m["dir"])
	}

	layerOpts.LayerFolderPath = m["dir"]

	// Generate the layer paths of the layer options
	img, err := daemon.imageStore.Get(container.ImageID)
	if err != nil {
		return nil, fmt.Errorf("failed to graph.Get on ImageID %s - %s", container.ImageID, err)
	}
	// Get the layer path for each layer.
	max := len(img.RootFS.DiffIDs)
	for i := 1; i <= max; i++ {
		img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
		layerPath, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
		if err != nil {
			return nil, fmt.Errorf("failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err)
		}
		// Reverse order, expecting parent most first
		layerOpts.LayerPaths = append([]string{layerPath}, layerOpts.LayerPaths...)
	}

	// Get endpoints for the libnetwork allocated networks to the container
	var epList []string
	AllowUnqualifiedDNSQuery := false
	gwHNSID := ""
	if container.NetworkSettings != nil {
		for n := range container.NetworkSettings.Networks {
			sn, err := daemon.FindNetwork(n)
			if err != nil {
				continue
			}

			ep, err := container.GetEndpointInNetwork(sn)
			if err != nil {
				continue
			}

			data, err := ep.DriverInfo()
			if err != nil {
				continue
			}

			if data["GW_INFO"] != nil {
				gwInfo := data["GW_INFO"].(map[string]interface{})
				if gwInfo["hnsid"] != nil {
					gwHNSID = gwInfo["hnsid"].(string)
				}
			}

			if data["hnsid"] != nil {
				epList = append(epList, data["hnsid"].(string))
			}

			if data["AllowUnqualifiedDNSQuery"] != nil {
				AllowUnqualifiedDNSQuery = true
			}
		}
	}

	if gwHNSID != "" {
		epList = append(epList, gwHNSID)
	}

	// Read and add credentials from the security options if a credential spec has been provided.
	if container.HostConfig.SecurityOpt != nil {
		for _, sOpt := range container.HostConfig.SecurityOpt {
			sOpt = strings.ToLower(sOpt)
			if !strings.Contains(sOpt, "=") {
				return nil, fmt.Errorf("invalid security option: no equals sign in supplied value %s", sOpt)
			}
			var splitsOpt []string
			splitsOpt = strings.SplitN(sOpt, "=", 2)
			if len(splitsOpt) != 2 {
				return nil, fmt.Errorf("invalid security option: %s", sOpt)
			}
			if splitsOpt[0] != "credentialspec" {
				return nil, fmt.Errorf("security option not supported: %s", splitsOpt[0])
			}

//.........这里部分代码省略.........

func (daemon *Daemon) populateCommand(c *container.Container, env []string) error {
	en := &execdriver.Network{
		Interface: nil,
	}

	var epList []string

	// Connect all the libnetwork allocated networks to the container
	if c.NetworkSettings != nil {
		for n := range c.NetworkSettings.Networks {
			sn, err := daemon.FindNetwork(n)
			if err != nil {
				continue
			}

			ep, err := c.GetEndpointInNetwork(sn)
			if err != nil {
				continue
			}

			data, err := ep.DriverInfo()
			if err != nil {
				continue
			}
			if data["hnsid"] != nil {
				epList = append(epList, data["hnsid"].(string))
			}
		}
	}

	if daemon.netController == nil {
		parts := strings.SplitN(string(c.HostConfig.NetworkMode), ":", 2)
		switch parts[0] {
		case "none":
		case "default", "": // empty string to support existing containers
			if !c.Config.NetworkDisabled {
				en.Interface = &execdriver.NetworkInterface{
					MacAddress:   c.Config.MacAddress,
					Bridge:       daemon.configStore.bridgeConfig.Iface,
					PortBindings: c.HostConfig.PortBindings,

					// TODO Windows. Include IPAddress. There already is a
					// property IPAddress on execDrive.CommonNetworkInterface,
					// but there is no CLI option in docker to pass through
					// an IPAddress on docker run.
				}
			}
		default:
			return fmt.Errorf("invalid network mode: %s", c.HostConfig.NetworkMode)
		}
	}

	// TODO Windows. More resource controls to be implemented later.
	resources := &execdriver.Resources{
		CommonResources: execdriver.CommonResources{
			CPUShares: c.HostConfig.CPUShares,
		},
	}

	processConfig := execdriver.ProcessConfig{
		CommonProcessConfig: execdriver.CommonProcessConfig{
			Entrypoint: c.Path,
			Arguments:  c.Args,
			Tty:        c.Config.Tty,
		},
		ConsoleSize: c.HostConfig.ConsoleSize,
	}

	processConfig.Env = env

	var layerPaths []string
	img, err := daemon.imageStore.Get(c.ImageID)
	if err != nil {
		return fmt.Errorf("Failed to graph.Get on ImageID %s - %s", c.ImageID, err)
	}

	if img.RootFS != nil && img.RootFS.Type == "layers+base" {
		max := len(img.RootFS.DiffIDs)
		for i := 0; i <= max; i++ {
			img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
			path, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
			if err != nil {
				return fmt.Errorf("Failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err)
			}
			// Reverse order, expecting parent most first
			layerPaths = append([]string{path}, layerPaths...)
		}
	}

	m, err := c.RWLayer.Metadata()
	if err != nil {
		return fmt.Errorf("Failed to get layer metadata - %s", err)
	}
	layerFolder := m["dir"]

	var hvPartition bool
	// Work out the isolation (whether it is a hypervisor partition)
	if c.HostConfig.Isolation.IsDefault() {
		// Not specified by caller. Take daemon default
		hvPartition = windows.DefaultIsolation.IsHyperV()
//.........这里部分代码省略.........

func (daemon *Daemon) createSpec(c *container.Container) (*libcontainerd.Spec, error) {
	s := oci.DefaultSpec()

	linkedEnv, err := daemon.setupLinkedContainers(c)
	if err != nil {
		return nil, err
	}

	// TODO Windows - this can be removed. Not used (UID/GID)
	rootUID, rootGID := daemon.GetRemappedUIDGID()
	if err := c.SetupWorkingDirectory(rootUID, rootGID); err != nil {
		return nil, err
	}

	img, err := daemon.imageStore.Get(c.ImageID)
	if err != nil {
		return nil, fmt.Errorf("Failed to graph.Get on ImageID %s - %s", c.ImageID, err)
	}

	// In base spec
	s.Hostname = c.FullHostname()

	// In s.Mounts
	mounts, err := daemon.setupMounts(c)
	if err != nil {
		return nil, err
	}
	for _, mount := range mounts {
		s.Mounts = append(s.Mounts, windowsoci.Mount{
			Source:      mount.Source,
			Destination: mount.Destination,
			Readonly:    !mount.Writable,
		})
	}

	// Are we going to run as a Hyper-V container?
	hv := false
	if c.HostConfig.Isolation.IsDefault() {
		// Container is set to use the default, so take the default from the daemon configuration
		hv = daemon.defaultIsolation.IsHyperV()
	} else {
		// Container is requesting an isolation mode. Honour it.
		hv = c.HostConfig.Isolation.IsHyperV()
	}
	if hv {
		// TODO We don't yet have the ImagePath hooked up. But set to
		// something non-nil to pickup in libcontainerd.
		s.Windows.HvRuntime = &windowsoci.HvRuntime{}
	}

	// In s.Process
	if c.Config.ArgsEscaped {
		s.Process.Args = append([]string{c.Path}, c.Args...)
	} else {
		// TODO (jstarks): escape the entrypoint too once the tests are fixed to not rely on this behavior
		s.Process.Args = append([]string{c.Path}, escapeArgs(c.Args)...)
	}
	s.Process.Cwd = c.Config.WorkingDir
	s.Process.Env = c.CreateDaemonEnvironment(linkedEnv)
	s.Process.InitialConsoleSize = c.HostConfig.ConsoleSize
	s.Process.Terminal = c.Config.Tty
	s.Process.User.User = c.Config.User

	// In spec.Root
	s.Root.Path = c.BaseFS
	s.Root.Readonly = c.HostConfig.ReadonlyRootfs

	// In s.Windows
	s.Windows.FirstStart = !c.HasBeenStartedBefore

	// s.Windows.LayerFolder.
	m, err := c.RWLayer.Metadata()
	if err != nil {
		return nil, fmt.Errorf("Failed to get layer metadata - %s", err)
	}
	s.Windows.LayerFolder = m["dir"]

	// s.Windows.LayerPaths
	var layerPaths []string
	if img.RootFS != nil && img.RootFS.Type == "layers+base" {
		max := len(img.RootFS.DiffIDs)
		for i := 0; i <= max; i++ {
			img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
			path, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
			if err != nil {
				return nil, fmt.Errorf("Failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err)
			}
			// Reverse order, expecting parent most first
			layerPaths = append([]string{path}, layerPaths...)
		}
	}
	s.Windows.LayerPaths = layerPaths

	// In s.Windows.Networking (TP5+ libnetwork way of doing things)
	// Connect all the libnetwork allocated networks to the container
	var epList []string
	if c.NetworkSettings != nil {
		for n := range c.NetworkSettings.Networks {
			sn, err := daemon.FindNetwork(n)
			if err != nil {
//.........这里部分代码省略.........