Golang utils.Errorf函數代碼示例

func (container *Container) cleanup() {
	container.releaseNetwork()

	// Disable all active links
	if container.activeLinks != nil {
		for _, link := range container.activeLinks {
			link.Disable()
		}
	}

	if container.Config.OpenStdin {
		if err := container.stdin.Close(); err != nil {
			utils.Errorf("%s: Error close stdin: %s", container.ID, err)
		}
	}
	if err := container.stdout.CloseWriters(); err != nil {
		utils.Errorf("%s: Error close stdout: %s", container.ID, err)
	}
	if err := container.stderr.CloseWriters(); err != nil {
		utils.Errorf("%s: Error close stderr: %s", container.ID, err)
	}

	if container.ptyMaster != nil {
		if err := container.ptyMaster.Close(); err != nil {
			utils.Errorf("%s: Error closing Pty master: %s", container.ID, err)
		}
	}

	if err := container.Unmount(); err != nil {
		log.Printf("%v: Failed to umount filesystem: %v", container.ID, err)
	}
}

func (container *Container) monitor(callback execdriver.StartCallback) error {
	var (
		err      error
		exitCode int
	)

	pipes := execdriver.NewPipes(container.stdin, container.stdout, container.stderr, container.Config.OpenStdin)
	exitCode, err = container.daemon.Run(container, pipes, callback)
	if err != nil {
		utils.Errorf("Error running container: %s", err)
	}
	container.State.SetStopped(exitCode)

	// Cleanup
	container.cleanup()

	// Re-create a brand new stdin pipe once the container exited
	if container.Config.OpenStdin {
		container.stdin, container.stdinPipe = io.Pipe()
	}
	if container.daemon != nil && container.daemon.srv != nil {
		container.daemon.srv.LogEvent("die", container.ID, container.daemon.repositories.ImageName(container.Image))
	}
	if container.daemon != nil && container.daemon.srv != nil && container.daemon.srv.IsRunning() {
		// FIXME: here is race condition between two RUN instructions in Dockerfile
		// because they share same runconfig and change image. Must be fixed
		// in server/buildfile.go
		if err := container.toDisk(); err != nil {
			utils.Errorf("Error dumping container %s state to disk: %s\n", container.ID, err)
		}
	}
	return err
}

func (daemon *Daemon) Close() error {
	errorsStrings := []string{}
	if err := daemon.shutdown(); err != nil {
		utils.Errorf("daemon.shutdown(): %s", err)
		errorsStrings = append(errorsStrings, err.Error())
	}
	if err := portallocator.ReleaseAll(); err != nil {
		utils.Errorf("portallocator.ReleaseAll(): %s", err)
		errorsStrings = append(errorsStrings, err.Error())
	}
	if err := daemon.driver.Cleanup(); err != nil {
		utils.Errorf("daemon.driver.Cleanup(): %s", err.Error())
		errorsStrings = append(errorsStrings, err.Error())
	}
	if err := daemon.containerGraph.Close(); err != nil {
		utils.Errorf("daemon.containerGraph.Close(): %s", err.Error())
		errorsStrings = append(errorsStrings, err.Error())
	}
	if err := mount.Unmount(daemon.config.Root); err != nil {
		utils.Errorf("daemon.Umount(%s): %s", daemon.config.Root, err.Error())
		errorsStrings = append(errorsStrings, err.Error())
	}
	if len(errorsStrings) > 0 {
		return fmt.Errorf("%s", strings.Join(errorsStrings, ", "))
	}
	return nil
}

func (container *Container) cleanup() {
	container.releaseNetwork()

	// Disable all active links
	if container.activeLinks != nil {
		for _, link := range container.activeLinks {
			link.Disable()
		}
	}

	if container.Config.OpenStdin {
		if err := container.stdin.Close(); err != nil {
			utils.Errorf("%s: Error close stdin: %s", container.ID, err)
		}
	}
	if err := container.stdout.CloseWriters(); err != nil {
		utils.Errorf("%s: Error close stdout: %s", container.ID, err)
	}
	if err := container.stderr.CloseWriters(); err != nil {
		utils.Errorf("%s: Error close stderr: %s", container.ID, err)
	}

	if container.ptyMaster != nil {
		if err := container.ptyMaster.Close(); err != nil {
			utils.Errorf("%s: Error closing Pty master: %s", container.ID, err)
		}
	}

	var (
		root   = container.RootfsPath()
		mounts = []string{
			root,
			path.Join(root, "/.dockerinit"),
			path.Join(root, "/.dockerenv"),
			path.Join(root, "/etc/resolv.conf"),
		}
	)

	if container.HostnamePath != "" && container.HostsPath != "" {
		mounts = append(mounts, path.Join(root, "/etc/hostname"), path.Join(root, "/etc/hosts"))
	}

	for r := range container.Volumes {
		mounts = append(mounts, path.Join(root, r))
	}

	for i := len(mounts) - 1; i >= 0; i-- {
		if lastError := mount.Unmount(mounts[i]); lastError != nil {
			log.Printf("Failed to umount %v: %v", mounts[i], lastError)
		}
	}

	if err := container.Unmount(); err != nil {
		log.Printf("%v: Failed to umount filesystem: %v", container.ID, err)
	}
}

func openNextAvailableLoopback(index int, sparseFile *osFile) (loopFile *osFile, err error) {
	// Start looking for a free /dev/loop
	for {
		target := fmt.Sprintf("/dev/loop%d", index)
		index++

		fi, err := osStat(target)
		if err != nil {
			if osIsNotExist(err) {
				utils.Errorf("There are no more loopback device available.")
			}
			return nil, ErrAttachLoopbackDevice
		}

		if fi.Mode()&osModeDevice != osModeDevice {
			utils.Errorf("Loopback device %s is not a block device.", target)
			continue
		}

		// OpenFile adds O_CLOEXEC
		loopFile, err = osOpenFile(target, osORdWr, 0644)
		if err != nil {
			utils.Errorf("Error openning loopback device: %s", err)
			return nil, ErrAttachLoopbackDevice
		}

		// Try to attach to the loop file
		if err := ioctlLoopSetFd(loopFile.Fd(), sparseFile.Fd()); err != nil {
			loopFile.Close()

			// If the error is EBUSY, then try the next loopback
			if err != sysEBusy {
				utils.Errorf("Cannot set up loopback device %s: %s", target, err)
				return nil, ErrAttachLoopbackDevice
			}

			// Otherwise, we keep going with the loop
			continue
		}
		// In case of success, we finished. Break the loop.
		break
	}

	// This can't happen, but let's be sure
	if loopFile == nil {
		utils.Errorf("Unreachable code reached! Error attaching %s to a loopback device.", sparseFile.Name())
		return nil, ErrAttachLoopbackDevice
	}

	return loopFile, nil
}

func (container *Container) monitor(callback execdriver.StartCallback) error {
	var (
		err      error
		exitCode int
	)

	if container.command == nil {
		// This happends when you have a GHOST container with lxc
		populateCommand(container)
		err = container.runtime.RestoreCommand(container)
	} else {
		pipes := execdriver.NewPipes(container.stdin, container.stdout, container.stderr, container.Config.OpenStdin)
		exitCode, err = container.runtime.Run(container, pipes, callback)
	}

	if err != nil {
		utils.Errorf("Error running container: %s", err)
	}

	container.State.SetStopped(exitCode)

	// FIXME: there is a race condition here which causes this to fail during the unit tests.
	// If another goroutine was waiting for Wait() to return before removing the container's root
	// from the filesystem... At this point it may already have done so.
	// This is because State.setStopped() has already been called, and has caused Wait()
	// to return.
	// FIXME: why are we serializing running state to disk in the first place?
	//log.Printf("%s: Failed to dump configuration to the disk: %s", container.ID, err)
	if err := container.ToDisk(); err != nil {
		utils.Errorf("Error dumping container state to disk: %s\n", err)
	}

	// Cleanup
	container.cleanup()

	// Re-create a brand new stdin pipe once the container exited
	if container.Config.OpenStdin {
		container.stdin, container.stdinPipe = io.Pipe()
	}

	if container.runtime != nil && container.runtime.srv != nil {
		container.runtime.srv.LogEvent("die", container.ID, container.runtime.repositories.ImageName(container.Image))
	}

	close(container.waitLock)

	return err
}

func (devices *DeviceSet) Shutdown() error {
	devices.Lock()
	defer devices.Unlock()

	utils.Debugf("[deviceset %s] shutdown()", devices.devicePrefix)
	utils.Debugf("[devmapper] Shutting down DeviceSet: %s", devices.root)
	defer utils.Debugf("[deviceset %s] shutdown END", devices.devicePrefix)

	for path, count := range devices.activeMounts {
		for i := count; i > 0; i-- {
			if err := sysUnmount(path, 0); err != nil {
				utils.Debugf("Shutdown unmounting %s, error: %s\n", path, err)
			}
		}
		delete(devices.activeMounts, path)
	}

	for _, d := range devices.Devices {
		if err := devices.waitClose(d.Hash); err != nil {
			utils.Errorf("Warning: error waiting for device %s to unmount: %s\n", d.Hash, err)
		}
		if err := devices.deactivateDevice(d.Hash); err != nil {
			utils.Debugf("Shutdown deactivate %s , error: %s\n", d.Hash, err)
		}
	}

	pool := devices.getPoolDevName()
	if devinfo, err := getInfo(pool); err == nil && devinfo.Exists != 0 {
		if err := devices.deactivateDevice("pool"); err != nil {
			utils.Debugf("Shutdown deactivate %s , error: %s\n", pool, err)
		}
	}

	return nil
}

func (devices *DeviceSet) deactivateDevice(hash string) error {
	utils.Debugf("[devmapper] deactivateDevice(%s)", hash)
	defer utils.Debugf("[devmapper] deactivateDevice END")

	// Wait for the unmount to be effective,
	// by watching the value of Info.OpenCount for the device
	if err := devices.waitClose(hash); err != nil {
		utils.Errorf("Warning: error waiting for device %s to close: %s\n", hash, err)
	}

	info := devices.Devices[hash]
	if info == nil {
		return fmt.Errorf("Unknown device %s", hash)
	}
	devinfo, err := getInfo(info.Name())
	if err != nil {
		utils.Debugf("\n--->Err: %s\n", err)
		return err
	}
	if devinfo.Exists != 0 {
		if err := devices.removeDeviceAndWait(info.Name()); err != nil {
			utils.Debugf("\n--->Err: %s\n", err)
			return err
		}
	}

	return nil
}

func (b *buildFile) addContext(container *Container, orig, dest string) error {
	origPath := path.Join(b.context, orig)
	destPath := path.Join(container.RootfsPath(), dest)
	// Preserve the trailing '/'
	if strings.HasSuffix(dest, "/") {
		destPath = destPath + "/"
	}
	if !strings.HasPrefix(origPath, b.context) {
		return fmt.Errorf("Forbidden path: %s", origPath)
	}
	fi, err := os.Stat(origPath)
	if err != nil {
		return fmt.Errorf("%s: no such file or directory", orig)
	}
	if fi.IsDir() {
		if err := CopyWithTar(origPath, destPath); err != nil {
			return err
		}
		// First try to unpack the source as an archive
	} else if err := UntarPath(origPath, destPath); err != nil {
		utils.Errorf("Couldn't untar %s to %s: %s", origPath, destPath, err)
		// If that fails, just copy it as a regular file
		if err := os.MkdirAll(path.Dir(destPath), 0755); err != nil {
			return err
		}
		if err := CopyWithTar(origPath, destPath); err != nil {
			return err
		}
	}
	return nil
}

func makeHttpHandler(eng *engine.Engine, logging bool, localMethod string, localRoute string, handlerFunc HttpApiFunc, enableCors bool, dockerVersion version.Version) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		// log the request
		utils.Debugf("Calling %s %s", localMethod, localRoute)

		if logging {
			log.Println(r.Method, r.RequestURI)
		}

		if strings.Contains(r.Header.Get("User-Agent"), "Docker-Client/") {
			userAgent := strings.Split(r.Header.Get("User-Agent"), "/")
			if len(userAgent) == 2 && !dockerVersion.Equal(version.Version(userAgent[1])) {
				utils.Debugf("Warning: client and server don't have the same version (client: %s, server: %s)", userAgent[1], dockerVersion)
			}
		}
		version := version.Version(mux.Vars(r)["version"])
		if version == "" {
			version = api.APIVERSION
		}
		if enableCors {
			writeCorsHeaders(w, r)
		}

		if version.GreaterThan(api.APIVERSION) {
			http.Error(w, fmt.Errorf("client and server don't have same version (client : %s, server: %s)", version, api.APIVERSION).Error(), http.StatusNotFound)
			return
		}

		if err := handlerFunc(eng, version, w, r, mux.Vars(r)); err != nil {
			utils.Errorf("Error: %s", err)
			httpError(w, err)
		}
	}
}

func postContainersCopy(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if vars == nil {
		return fmt.Errorf("Missing parameter")
	}
	name := vars["name"]

	copyData := &APICopy{}
	contentType := r.Header.Get("Content-Type")
	if contentType == "application/json" {
		if err := json.NewDecoder(r.Body).Decode(copyData); err != nil {
			return err
		}
	} else {
		return fmt.Errorf("Content-Type not supported: %s", contentType)
	}

	if copyData.Resource == "" {
		return fmt.Errorf("Resource cannot be empty")
	}
	if copyData.Resource[0] == '/' {
		copyData.Resource = copyData.Resource[1:]
	}

	if err := srv.ContainerCopy(name, copyData.Resource, w); err != nil {
		utils.Errorf("%s", err.Error())
		return err
	}
	return nil
}

func makeHttpHandler(srv *Server, logging bool, localMethod string, localRoute string, handlerFunc HttpApiFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		// log the request
		utils.Debugf("Calling %s %s", localMethod, localRoute)

		if logging {
			log.Println(r.Method, r.RequestURI)
		}

		if strings.Contains(r.Header.Get("User-Agent"), "Docker-Client/") {
			userAgent := strings.Split(r.Header.Get("User-Agent"), "/")
			if len(userAgent) == 2 && userAgent[1] != VERSION {
				utils.Debugf("Warning: client and server don't have the same version (client: %s, server: %s)", userAgent[1], VERSION)
			}
		}
		version, err := strconv.ParseFloat(mux.Vars(r)["version"], 64)
		if err != nil {
			version = APIVERSION
		}
		if srv.runtime.config.EnableCors {
			writeCorsHeaders(w, r)
		}

		if version == 0 || version > APIVERSION {
			w.WriteHeader(http.StatusNotFound)
			return
		}

		if err := handlerFunc(srv, version, w, r, mux.Vars(r)); err != nil {
			utils.Errorf("Error: %s", err)
			httpError(w, err)
		}
	}
}

func LoopbackSetCapacity(file *osFile) error {
	if err := ioctlLoopSetCapacity(file.Fd(), 0); err != nil {
		utils.Errorf("Error loopbackSetCapacity: %s", err)
		return ErrLoopbackSetCapacity
	}
	return nil
}

func matchesContentType(contentType, expectedType string) bool {
	mimetype, _, err := mime.ParseMediaType(contentType)
	if err != nil {
		utils.Errorf("Error parsing media type: %s error: %s", contentType, err.Error())
	}
	return err == nil && mimetype == expectedType
}

func postContainersCopy(eng *engine.Engine, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if vars == nil {
		return fmt.Errorf("Missing parameter")
	}

	var copyData engine.Env

	if contentType := r.Header.Get("Content-Type"); contentType == "application/json" {
		if err := copyData.Decode(r.Body); err != nil {
			return err
		}
	} else {
		return fmt.Errorf("Content-Type not supported: %s", contentType)
	}

	if copyData.Get("Resource") == "" {
		return fmt.Errorf("Path cannot be empty")
	}
	if copyData.Get("Resource")[0] == '/' {
		copyData.Set("Resource", copyData.Get("Resource")[1:])
	}

	job := eng.Job("container_copy", vars["name"], copyData.Get("Resource"))
	job.Stdout.Add(w)
	if err := job.Run(); err != nil {
		utils.Errorf("%s", err.Error())
	}
	return nil
}