Golang hcsshim.DeactivateLayer函數代碼示例

// Get returns the rootfs path for the id. This will mount the dir at it's given path.
func (d *Driver) Get(id, mountLabel string) (string, error) {
	logrus.Debugf("WindowsGraphDriver Get() id %s mountLabel %s", id, mountLabel)
	var dir string

	rID, err := d.resolveID(id)
	if err != nil {
		return "", err
	}
	if count := d.ctr.Increment(rID); count > 1 {
		return d.cache[rID], nil
	}

	// Getting the layer paths must be done outside of the lock.
	layerChain, err := d.getLayerChain(rID)
	if err != nil {
		d.ctr.Decrement(rID)
		return "", err
	}

	if err := hcsshim.ActivateLayer(d.info, rID); err != nil {
		d.ctr.Decrement(rID)
		return "", err
	}
	if err := hcsshim.PrepareLayer(d.info, rID, layerChain); err != nil {
		d.ctr.Decrement(rID)
		if err2 := hcsshim.DeactivateLayer(d.info, rID); err2 != nil {
			logrus.Warnf("Failed to Deactivate %s: %s", id, err)
		}
		return "", err
	}

	mountPath, err := hcsshim.GetLayerMountPath(d.info, rID)
	if err != nil {
		d.ctr.Decrement(rID)
		if err2 := hcsshim.DeactivateLayer(d.info, rID); err2 != nil {
			logrus.Warnf("Failed to Deactivate %s: %s", id, err)
		}
		return "", err
	}
	d.cacheMu.Lock()
	d.cache[rID] = mountPath
	d.cacheMu.Unlock()

	// If the layer has a mount path, use that. Otherwise, use the
	// folder path.
	if mountPath != "" {
		dir = mountPath
	} else {
		dir = d.dir(id)
	}

	return dir, nil
}

// Get returns the rootfs path for the id. This will mount the dir at it's given path
func (d *Driver) Get(id, mountLabel string) (string, error) {
	logrus.Debugf("WindowsGraphDriver Get() id %s mountLabel %s", id, mountLabel)
	var dir string

	d.Lock()
	defer d.Unlock()

	rId, err := d.resolveId(id)
	if err != nil {
		return "", err
	}

	// Getting the layer paths must be done outside of the lock.
	layerChain, err := d.getLayerChain(rId)
	if err != nil {
		return "", err
	}

	if d.active[rId] == 0 {
		if err := hcsshim.ActivateLayer(d.info, rId); err != nil {
			return "", err
		}
		if err := hcsshim.PrepareLayer(d.info, rId, layerChain); err != nil {
			if err2 := hcsshim.DeactivateLayer(d.info, rId); err2 != nil {
				logrus.Warnf("Failed to Deactivate %s: %s", id, err)
			}
			return "", err
		}
	}

	mountPath, err := hcsshim.GetLayerMountPath(d.info, rId)
	if err != nil {
		if err2 := hcsshim.DeactivateLayer(d.info, rId); err2 != nil {
			logrus.Warnf("Failed to Deactivate %s: %s", id, err)
		}
		return "", err
	}

	d.active[rId]++

	// If the layer has a mount path, use that. Otherwise, use the
	// folder path.
	if mountPath != "" {
		dir = mountPath
	} else {
		dir = d.dir(id)
	}

	return dir, nil
}

// Put adds a new layer to the driver.
func (d *Driver) Put(id string) error {
	logrus.Debugf("WindowsGraphDriver Put() id %s", id)

	rID, err := d.resolveID(id)
	if err != nil {
		return err
	}

	d.Lock()
	defer d.Unlock()

	if d.active[rID] > 1 {
		d.active[rID]--
	} else if d.active[rID] == 1 {
		if err := hcsshim.UnprepareLayer(d.info, rID); err != nil {
			return err
		}
		if err := hcsshim.DeactivateLayer(d.info, rID); err != nil {
			return err
		}
		delete(d.active, rID)
	}

	return nil
}

// Diff produces an archive of the changes between the specified
// layer and its parent layer which may be "".
func (d *Driver) Diff(id, parent string) (_ archive.Archive, err error) {
	rID, err := d.resolveID(id)
	if err != nil {
		return
	}

	// Getting the layer paths must be done outside of the lock.
	layerChain, err := d.getLayerChain(rID)
	if err != nil {
		return
	}

	var undo func()

	d.Lock()

	// To support export, a layer must be activated but not prepared.
	if d.info.Flavour == filterDriver {
		if d.active[rID] == 0 {
			if err = hcsshim.ActivateLayer(d.info, rID); err != nil {
				d.Unlock()
				return
			}
			undo = func() {
				if err := hcsshim.DeactivateLayer(d.info, rID); err != nil {
					logrus.Warnf("Failed to Deactivate %s: %s", rID, err)
				}
			}
		} else {
			if err = hcsshim.UnprepareLayer(d.info, rID); err != nil {
				d.Unlock()
				return
			}
			undo = func() {
				if err := hcsshim.PrepareLayer(d.info, rID, layerChain); err != nil {
					logrus.Warnf("Failed to re-PrepareLayer %s: %s", rID, err)
				}
			}
		}
	}

	d.Unlock()

	arch, err := d.exportLayer(rID, layerChain)
	if err != nil {
		undo()
		return
	}
	return ioutils.NewReadCloserWrapper(arch, func() error {
		defer undo()
		return arch.Close()
	}), nil
}

// Put adds a new layer to the driver.
func (d *Driver) Put(id string) error {
	logrus.Debugf("WindowsGraphDriver Put() id %s", id)

	rID, err := d.resolveID(id)
	if err != nil {
		return err
	}

	if err := hcsshim.UnprepareLayer(d.info, rID); err != nil {
		return err
	}
	return hcsshim.DeactivateLayer(d.info, rID)
}

// Changes produces a list of changes between the specified layer
// and its parent layer. If parent is "", then all changes will be ADD changes.
// The layer should not be mounted when calling this function.
func (d *Driver) Changes(id, parent string) ([]archive.Change, error) {
	rID, err := d.resolveID(id)
	if err != nil {
		return nil, err
	}
	parentChain, err := d.getLayerChain(rID)
	if err != nil {
		return nil, err
	}

	if err := hcsshim.ActivateLayer(d.info, rID); err != nil {
		return nil, err
	}
	defer func() {
		if err2 := hcsshim.DeactivateLayer(d.info, rID); err2 != nil {
			logrus.Errorf("changes() failed to DeactivateLayer %s %s: %s", id, rID, err2)
		}
	}()

	var changes []archive.Change
	err = winio.RunWithPrivilege(winio.SeBackupPrivilege, func() error {
		r, err := hcsshim.NewLayerReader(d.info, id, parentChain)
		if err != nil {
			return err
		}
		defer r.Close()

		for {
			name, _, fileInfo, err := r.Next()
			if err == io.EOF {
				return nil
			}
			if err != nil {
				return err
			}
			name = filepath.ToSlash(name)
			if fileInfo == nil {
				changes = append(changes, archive.Change{Path: name, Kind: archive.ChangeDelete})
			} else {
				// Currently there is no way to tell between an add and a modify.
				changes = append(changes, archive.Change{Path: name, Kind: archive.ChangeModify})
			}
		}
	})
	if err != nil {
		return nil, err
	}

	return changes, nil
}

func (d *WindowsGraphDriver) Put(id string) error {
	logrus.Debugf("WindowsGraphDriver Put() id %s", id)

	d.Lock()
	defer d.Unlock()

	if d.active[id] > 1 {
		d.active[id]--
	} else if d.active[id] == 1 {
		if err := hcsshim.DeactivateLayer(d.info, id); err != nil {
			return err
		}
		delete(d.active, id)
	}

	return nil
}

func (d *WindowsGraphDriver) CopyDiff(sourceId, id string, parentLayerPaths []string) error {
	d.Lock()
	defer d.Unlock()

	if d.info.Flavour == filterDriver && d.active[sourceId] == 0 {
		if err := hcsshim.ActivateLayer(d.info, sourceId); err != nil {
			return err
		}
		defer func() {
			err := hcsshim.DeactivateLayer(d.info, sourceId)
			if err != nil {
				logrus.Warnf("Failed to Deactivate %s: %s", sourceId, err)
			}
		}()
	}

	return hcsshim.CopyLayer(d.info, sourceId, id, parentLayerPaths)
}

// Diff produces an archive of the changes between the specified
// layer and its parent layer which may be "".
func (d *Driver) Diff(id, parent string) (arch archive.Archive, err error) {
	rID, err := d.resolveID(id)
	if err != nil {
		return
	}

	// Getting the layer paths must be done outside of the lock.
	layerChain, err := d.getLayerChain(rID)
	if err != nil {
		return
	}

	d.Lock()

	// To support export, a layer must be activated but not prepared.
	if d.info.Flavour == filterDriver {
		if d.active[rID] == 0 {
			if err = hcsshim.ActivateLayer(d.info, rID); err != nil {
				d.Unlock()
				return
			}
			defer func() {
				if err := hcsshim.DeactivateLayer(d.info, rID); err != nil {
					logrus.Warnf("Failed to Deactivate %s: %s", rID, err)
				}
			}()
		} else {
			if err = hcsshim.UnprepareLayer(d.info, rID); err != nil {
				d.Unlock()
				return
			}
			defer func() {
				if err := hcsshim.PrepareLayer(d.info, rID, layerChain); err != nil {
					logrus.Warnf("Failed to re-PrepareLayer %s: %s", rID, err)
				}
			}()
		}
	}

	d.Unlock()

	return d.exportLayer(rID, layerChain)
}

// Put adds a new layer to the driver.
func (d *Driver) Put(id string) error {
	logrus.Debugf("WindowsGraphDriver Put() id %s", id)

	rID, err := d.resolveID(id)
	if err != nil {
		return err
	}
	if count := d.ctr.Decrement(rID); count > 0 {
		return nil
	}
	d.cacheMu.Lock()
	delete(d.cache, rID)
	d.cacheMu.Unlock()

	if err := hcsshim.UnprepareLayer(d.info, rID); err != nil {
		return err
	}
	return hcsshim.DeactivateLayer(d.info, rID)
}

func GetLayerPath2(di hcsshim.DriverInfo, layerId, parentLayerPath string) (string, error) {
	parentLayerId := GetLayerId(parentLayerPath)
	err := hcsshim.CreateLayer(di, layerId, parentLayerId)
	if err != nil {
		return "", err
	}

	err = hcsshim.ActivateLayer(di, layerId)
	if err != nil {
		return "", err
	}

	err = hcsshim.PrepareLayer(di, layerId, []string{parentLayerPath})
	if err != nil {
		return "", err
	}

	layerFolderPath, err := hcsshim.GetLayerMountPath(di, layerId)
	if err != nil {
		return "", err
	}
	log.Printf("Container layer folder path %v", layerFolderPath)

	err = hcsshim.UnprepareLayer(di, layerId)
	if err != nil {
		return "", err
	}

	err = hcsshim.DeactivateLayer(di, layerId)
	if err != nil {
		return "", err
	}

	err = hcsshim.DestroyLayer(di, layerId)
	if err != nil {
		return "", err
	}

	return layerFolderPath, nil
}

//.........這裏部分代碼省略.........
	hcsNets, err := hcsshim.HNSListNetworkRequest("GET", "", "")
	panicIf(err)
	fmt.Println(hcsNets)

	virtualNetworkId := ""
	for _, n := range hcsNets {
		if n.Name == "nat" {
			virtualNetworkId = n.Id
		}
	}

	// https://github.com/docker/libnetwork/blob/f9a1590164b878e668eabf889dd79fb6af8eaced/drivers/windows/windows.go#L284
	endpointRequest := hcsshim.HNSEndpoint{
		VirtualNetwork: virtualNetworkId,
	}
	endpointRequestJson, err := json.Marshal(endpointRequest)
	panicIf(err)

	endpoint, err := hcsshim.HNSEndpointRequest("POST", "", string(endpointRequestJson))
	panicIf(err)
	fmt.Println(*endpoint)

	windowsservercorePath, err := hcsshim.GetLayerMountPath(di, windowsbaseId)
	panicIf(err)
	fmt.Println(windowsservercorePath)

	layerChain, err := GetLayerChain(windowsservercorePath)
	panicIf(err)
	fmt.Println(layerChain)

	newContainerId := stringid.GenerateNonCryptoID()

	layerFolderPath, volumeMountPath, err := CreateAndActivateContainerLayer(di, newContainerId, windowsservercorePath)
	panicIf(err)

	containerConfig := hcsshim.ContainerConfig{
		SystemType:              "Container",
		Name:                    newContainerId,
		Owner:                   "Garden",
		LayerFolderPath:         layerFolderPath,
		VolumePath:              volumeMountPath,
		IgnoreFlushesDuringBoot: true,
		EndpointList:            []string{endpoint.Id},
	}

	// https://github.com/docker/docker/blob/cf58eb437c4229e876f2d952a228b603a074e584/libcontainerd/client_windows.go#L111-L121
	for _, layerPath := range layerChain {
		id, err := hcsshim.NameToGuid(GetLayerId(layerPath))
		panicIf(err)

		containerConfig.Layers = append(containerConfig.Layers, hcsshim.Layer{
			Path: layerPath,
			ID:   id.ToString(),
		})
	}

	c, err := hcsshim.CreateContainer(newContainerId, &containerConfig)
	panicIf(err)
	fmt.Println(c)

	err = c.Start()
	panicIf(err)

	stats, err := c.Statistics()
	panicIf(err)
	fmt.Println(stats)

	processConfig := hcsshim.ProcessConfig{
		CommandLine:      "ping 127.0.0.1",
		WorkingDirectory: "C:\\",
		//CreateStdErrPipe: true,
		//CreateStdInPipe:  true,
		//CreateStdOutPipe: true,
	}

	p, err := c.CreateProcess(&processConfig)
	panicIf(err)
	fmt.Println(p)

	err = p.Wait()
	panicIf(err)

	err = c.Shutdown()
	warnIf(err)

	err = c.Terminate()
	warnIf(err)

	endpoint, err = hcsshim.HNSEndpointRequest("DELETE", endpoint.Id, "")
	warnIf(err)

	err = hcsshim.UnprepareLayer(di, newContainerId)
	warnIf(err)

	err = hcsshim.DeactivateLayer(di, newContainerId)
	warnIf(err)

	err = hcsshim.DestroyLayer(di, newContainerId)
	warnIf(err)
}

// Changes produces a list of changes between the specified layer
// and its parent layer. If parent is "", then all changes will be ADD changes.
func (d *Driver) Changes(id, parent string) ([]archive.Change, error) {
	rID, err := d.resolveID(id)
	if err != nil {
		return nil, err
	}
	parentChain, err := d.getLayerChain(rID)
	if err != nil {
		return nil, err
	}

	d.Lock()
	if d.info.Flavour == filterDriver {
		if d.active[rID] == 0 {
			if err = hcsshim.ActivateLayer(d.info, rID); err != nil {
				d.Unlock()
				return nil, err
			}
			defer func() {
				if err := hcsshim.DeactivateLayer(d.info, rID); err != nil {
					logrus.Warnf("Failed to Deactivate %s: %s", rID, err)
				}
			}()
		} else {
			if err = hcsshim.UnprepareLayer(d.info, rID); err != nil {
				d.Unlock()
				return nil, err
			}
			defer func() {
				if err := hcsshim.PrepareLayer(d.info, rID, parentChain); err != nil {
					logrus.Warnf("Failed to re-PrepareLayer %s: %s", rID, err)
				}
			}()
		}
	}
	d.Unlock()

	r, err := hcsshim.NewLayerReader(d.info, id, parentChain)
	if err != nil {
		return nil, err
	}
	defer r.Close()

	var changes []archive.Change
	for {
		name, _, fileInfo, err := r.Next()
		if err == io.EOF {
			break
		}
		if err != nil {
			return nil, err
		}
		name = filepath.ToSlash(name)
		if fileInfo == nil {
			changes = append(changes, archive.Change{name, archive.ChangeDelete})
		} else {
			// Currently there is no way to tell between an add and a modify.
			changes = append(changes, archive.Change{name, archive.ChangeModify})
		}
	}
	return changes, nil
}