Golang utils.Debugf函數代碼示例

func (devices *DeviceSet) deactivateDevice(hash string) error {
	utils.Debugf("[devmapper] deactivateDevice(%s)", hash)
	defer utils.Debugf("[devmapper] deactivateDevice END")
	var devname string
	// FIXME: shouldn't we just register the pool into devices?
	devname, err := devices.byHash(hash)
	if err != nil {
		return err
	}
	devinfo, err := getInfo(devname)
	if err != nil {
		utils.Debugf("\n--->Err: %s\n", err)
		return err
	}
	if devinfo.Exists != 0 {
		if err := removeDevice(devname); err != nil {
			utils.Debugf("\n--->Err: %s\n", err)
			return err
		}
		if err := devices.waitRemove(hash); err != nil {
			return err
		}
	}

	return nil
}

func (devices *DeviceSet) AddDevice(hash, baseHash string) error {
	devices.Lock()
	defer devices.Unlock()

	if devices.Devices[hash] != nil {
		return fmt.Errorf("hash %s already exists", hash)
	}

	baseInfo := devices.Devices[baseHash]
	if baseInfo == nil {
		return fmt.Errorf("Error adding device for '%s': can't find device for parent '%s'", hash, baseHash)
	}

	deviceId := devices.allocateDeviceId()

	if err := devices.createSnapDevice(devices.getPoolDevName(), deviceId, baseInfo.Name(), baseInfo.DeviceId); err != nil {
		utils.Debugf("Error creating snap device: %s\n", err)
		return err
	}

	if _, err := devices.registerDevice(deviceId, hash, baseInfo.Size); err != nil {
		deleteDevice(devices.getPoolDevName(), deviceId)
		utils.Debugf("Error registering device: %s\n", err)
		return err
	}
	return nil
}

func (proxy *UDPProxy) replyLoop(proxyConn *net.UDPConn, clientAddr *net.UDPAddr, clientKey *connTrackKey) {
	defer func() {
		proxy.connTrackLock.Lock()
		delete(proxy.connTrackTable, *clientKey)
		proxy.connTrackLock.Unlock()
		utils.Debugf("Done proxying between udp/%v and udp/%v", clientAddr.String(), proxy.backendAddr.String())
		proxyConn.Close()
	}()

	readBuf := make([]byte, UDPBufSize)
	for {
		proxyConn.SetReadDeadline(time.Now().Add(UDPConnTrackTimeout))
	again:
		read, err := proxyConn.Read(readBuf)
		if err != nil {
			if err, ok := err.(*net.OpError); ok && err.Err == syscall.ECONNREFUSED {
				// This will happen if the last write failed
				// (e.g: nothing is actually listening on the
				// proxied port on the container), ignore it
				// and continue until UDPConnTrackTimeout
				// expires:
				goto again
			}
			return
		}
		for i := 0; i != read; {
			written, err := proxy.listener.WriteToUDP(readBuf[i:read], clientAddr)
			if err != nil {
				return
			}
			i += written
			utils.Debugf("Forwarded %v/%v bytes to udp/%v", i, read, clientAddr.String())
		}
	}
}

func spawnGlobalDaemon() {
	if globalRuntime != nil {
		utils.Debugf("Global runtime already exists. Skipping.")
		return
	}
	t := log.New(os.Stderr, "", 0)
	eng := NewTestEngine(t)
	globalEngine = eng
	globalRuntime = mkRuntimeFromEngine(eng, t)

	// Spawn a Daemon
	go func() {
		utils.Debugf("Spawning global daemon for integration tests")
		listenURL := &url.URL{
			Scheme: testDaemonProto,
			Host:   testDaemonAddr,
		}
		job := eng.Job("serveapi", listenURL.String())
		job.SetenvBool("Logging", true)
		if err := job.Run(); err != nil {
			log.Fatalf("Unable to spawn the test daemon: %s", err)
		}
	}()
	// Give some time to ListenAndServer to actually start
	// FIXME: use inmem transports instead of tcp
	time.Sleep(time.Second)
}

func (container *Container) setupPty() error {
	ptyMaster, ptySlave, err := pty.Open()
	if err != nil {
		return err
	}
	container.ptyMaster = ptyMaster
	container.command.Stdout = ptySlave
	container.command.Stderr = ptySlave

	// Copy the PTYs to our broadcasters
	go func() {
		defer container.stdout.CloseWriters()
		utils.Debugf("startPty: begin of stdout pipe")
		io.Copy(container.stdout, ptyMaster)
		utils.Debugf("startPty: end of stdout pipe")
	}()

	// stdin
	if container.Config.OpenStdin {
		container.command.Stdin = ptySlave
		container.command.SysProcAttr.Setctty = true
		go func() {
			defer container.stdin.Close()
			utils.Debugf("startPty: begin of stdin pipe")
			io.Copy(ptyMaster, container.stdin)
			utils.Debugf("startPty: end of stdin pipe")
		}()
	}
	return nil
}

// waitRemove blocks until either:
// a) the device registered at <device_set_prefix>-<hash> is removed,
// or b) the 1 second timeout expires.
func (devices *DeviceSet) waitRemove(hash string) error {
	utils.Debugf("[deviceset %s] waitRemove(%s)", devices.devicePrefix, hash)
	defer utils.Debugf("[deviceset %s] waitRemove(%) END", devices.devicePrefix, hash)
	devname, err := devices.byHash(hash)
	if err != nil {
		return err
	}
	i := 0
	for ; i < 1000; i += 1 {
		devinfo, err := getInfo(devname)
		if err != nil {
			// If there is an error we assume the device doesn't exist.
			// The error might actually be something else, but we can't differentiate.
			return nil
		}
		if i%100 == 0 {
			utils.Debugf("Waiting for removal of %s: exists=%d", devname, devinfo.Exists)
		}
		if devinfo.Exists == 0 {
			break
		}

		time.Sleep(1 * time.Millisecond)
	}
	if i == 1000 {
		return fmt.Errorf("Timeout while waiting for device %s to be removed", devname)
	}
	return nil
}

func makeHttpHandler(eng *engine.Engine, logging bool, localMethod string, localRoute string, handlerFunc HttpApiFunc, enableCors bool, dockerVersion string) 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] != dockerVersion {
				utils.Debugf("Warning: client and server don't have the same version (client: %s, server: %s)", userAgent[1], dockerVersion)
			}
		}
		version, err := strconv.ParseFloat(mux.Vars(r)["version"], 64)
		if err != nil {
			version = APIVERSION
		}
		if enableCors {
			writeCorsHeaders(w, r)
		}

		if version == 0 || version > APIVERSION {
			http.Error(w, fmt.Errorf("client and server don't have same version (client : %g, server: %g)", version, 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 (devices *DeviceSet) UnmountDevice(hash, path string, deactivate bool) error {
	utils.Debugf("[devmapper] UnmountDevice(hash=%s path=%s)", hash, path)
	defer utils.Debugf("[devmapper] UnmountDevice END")
	devices.Lock()
	defer devices.Unlock()

	utils.Debugf("[devmapper] Unmount(%s)", path)
	if err := sysUnmount(path, 0); err != nil {
		utils.Debugf("\n--->Err: %s\n", err)
		return err
	}
	utils.Debugf("[devmapper] Unmount done")
	// Wait for the unmount to be effective,
	// by watching the value of Info.OpenCount for the device
	if err := devices.waitClose(hash); err != nil {
		return err
	}

	if count := devices.activeMounts[path]; count > 1 {
		devices.activeMounts[path] = count - 1
	} else {
		delete(devices.activeMounts, path)
	}

	if deactivate {
		devices.deactivateDevice(hash)
	}

	return nil
}

func removeDevice(name string) error {
	utils.Debugf("[devmapper] removeDevice START")
	defer utils.Debugf("[devmapper] removeDevice END")
	task, err := createTask(DeviceRemove, name)
	if task == nil {
		return err
	}
	if err = task.Run(); err != nil {
		return fmt.Errorf("Error running removeDevice")
	}
	return nil
}

func (devices *DeviceSet) setupBaseImage() error {
	oldInfo := devices.Devices[""]
	if oldInfo != nil && oldInfo.Initialized {
		return nil
	}

	if oldInfo != nil && !oldInfo.Initialized {
		utils.Debugf("Removing uninitialized base image")
		if err := devices.removeDevice(""); err != nil {
			utils.Debugf("\n--->Err: %s\n", err)
			return err
		}
	}

	utils.Debugf("Initializing base device-manager snapshot")

	id := devices.allocateDeviceId()

	// Create initial device
	if err := createDevice(devices.getPoolDevName(), id); err != nil {
		utils.Debugf("\n--->Err: %s\n", err)
		return err
	}

	utils.Debugf("Registering base device (id %v) with FS size %v", id, DefaultBaseFsSize)
	info, err := devices.registerDevice(id, "", DefaultBaseFsSize)
	if err != nil {
		_ = deleteDevice(devices.getPoolDevName(), id)
		utils.Debugf("\n--->Err: %s\n", err)
		return err
	}

	utils.Debugf("Creating filesystem on base device-manager snapshot")

	if err = devices.activateDeviceIfNeeded(""); err != nil {
		utils.Debugf("\n--->Err: %s\n", err)
		return err
	}

	if err := devices.createFilesystem(info); err != nil {
		utils.Debugf("\n--->Err: %s\n", err)
		return err
	}

	info.Initialized = true
	if err = devices.saveMetadata(); err != nil {
		info.Initialized = false
		utils.Debugf("\n--->Err: %s\n", err)
		return err
	}

	return nil
}

func (proxy *TCPProxy) Run() {
	quit := make(chan bool)
	defer close(quit)
	utils.Debugf("Starting proxy on tcp/%v for tcp/%v", proxy.frontendAddr, proxy.backendAddr)
	for {
		client, err := proxy.listener.Accept()
		if err != nil {
			utils.Debugf("Stopping proxy on tcp/%v for tcp/%v (%v)", proxy.frontendAddr, proxy.backendAddr, err.Error())
			return
		}
		go proxy.clientLoop(client.(*net.TCPConn), quit)
	}
}

// Tar creates an archive from the directory at `path`, only including files whose relative
// paths are included in `filter`. If `filter` is nil, then all files are included.
func TarFilter(srcPath string, options *TarOptions) (io.Reader, error) {
	pipeReader, pipeWriter := io.Pipe()

	compressWriter, err := CompressStream(pipeWriter, options.Compression)
	if err != nil {
		return nil, err
	}

	tw := tar.NewWriter(compressWriter)

	go func() {
		// In general we log errors here but ignore them because
		// during e.g. a diff operation the container can continue
		// mutating the filesystem and we can see transient errors
		// from this

		if options.Includes == nil {
			options.Includes = []string{"."}
		}

		for _, include := range options.Includes {
			filepath.Walk(filepath.Join(srcPath, include), func(filePath string, f os.FileInfo, err error) error {
				if err != nil {
					utils.Debugf("Tar: Can't stat file %s to tar: %s\n", srcPath, err)
					return nil
				}

				relFilePath, err := filepath.Rel(srcPath, filePath)
				if err != nil {
					return nil
				}

				if err := addTarFile(filePath, relFilePath, tw); err != nil {
					utils.Debugf("Can't add file %s to tar: %s\n", srcPath, err)
				}
				return nil
			})
		}

		// Make sure to check the error on Close.
		if err := tw.Close(); err != nil {
			utils.Debugf("Can't close tar writer: %s\n", err)
		}
		if err := compressWriter.Close(); err != nil {
			utils.Debugf("Can't close compress writer: %s\n", err)
		}
	}()

	return pipeReader, nil
}

// probeCache checks to see if image-caching is enabled (`b.utilizeCache`)
// and if so attempts to look up the current `b.image` and `b.config` pair
// in the current server `b.srv`. If an image is found, probeCache returns
// `(true, nil)`. If no image is found, it returns `(false, nil)`. If there
// is any error, it returns `(false, err)`.
func (b *buildFile) probeCache() (bool, error) {
	if b.utilizeCache {
		if cache, err := b.srv.ImageGetCached(b.image, b.config); err != nil {
			return false, err
		} else if cache != nil {
			fmt.Fprintf(b.outStream, " ---> Using cache\n")
			utils.Debugf("[BUILDER] Use cached version")
			b.image = cache.ID
			return true, nil
		} else {
			utils.Debugf("[BUILDER] Cache miss")
		}
	}
	return false, nil
}

func (b *buildFile) addContext(container *Container, orig, dest string) error {
	var (
		origPath = path.Join(b.contextPath, orig)
		destPath = path.Join(container.BasefsPath(), dest)
	)
	// Preserve the trailing '/'
	if strings.HasSuffix(dest, "/") {
		destPath = destPath + "/"
	}
	fi, err := os.Stat(origPath)
	if err != nil {
		if os.IsNotExist(err) {
			return fmt.Errorf("%s: no such file or directory", orig)
		}
		return err
	}
	if fi.IsDir() {
		if err := archive.CopyWithTar(origPath, destPath); err != nil {
			return err
		}
		// First try to unpack the source as an archive
	} else if err := archive.UntarPath(origPath, destPath); err != nil {
		utils.Debugf("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 := archive.CopyWithTar(origPath, destPath); err != nil {
			return err
		}
	}
	return nil
}

// Destroy unregisters a container from the runtime and cleanly removes its contents from the filesystem.
func (runtime *Runtime) Destroy(container *Container) error {
	if container == nil {
		return fmt.Errorf("The given container is <nil>")
	}

	element := runtime.getContainerElement(container.ID)
	if element == nil {
		return fmt.Errorf("Container %v not found - maybe it was already destroyed?", container.ID)
	}

	if err := container.Stop(3); err != nil {
		return err
	}

	if err := runtime.driver.Remove(container.ID); err != nil {
		return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", runtime.driver, container.ID, err)
	}

	initID := fmt.Sprintf("%s-init", container.ID)
	if err := runtime.driver.Remove(initID); err != nil {
		return fmt.Errorf("Driver %s failed to remove init filesystem %s: %s", runtime.driver, initID, err)
	}

	if _, err := runtime.containerGraph.Purge(container.ID); err != nil {
		utils.Debugf("Unable to remove container from link graph: %s", err)
	}

	// Deregister the container before removing its directory, to avoid race conditions
	runtime.idIndex.Delete(container.ID)
	runtime.containers.Remove(element)
	if err := os.RemoveAll(container.root); err != nil {
		return fmt.Errorf("Unable to remove filesystem for %v: %v", container.ID, err)
	}
	return nil
}