Golang log.Errorf函数代码示例

func updateConfig(c *Container, subsystem string, value string) error {
	if subsystem == "cpuset.cpus" {
		c.Config.Cpuset = value
	} else if subsystem == "memory.limit_in_bytes" {
		parsedMemory, err := units.RAMInBytes(value)
		if err != nil {
			log.Errorf("Update memory.limit_in_bytes for container %s error %v", c.ID, err)
			return err
		}
		c.Config.Memory = parsedMemory
	} else if subsystem == "cpu.shares" {
		parsedCpu, err := strconv.ParseInt(value, 10, 64)
		if err != nil {
			log.Errorf("Update cpu.shares for container %s error %v", c.ID, err)
			return err
		}
		c.Config.CpuShares = parsedCpu
	} else if subsystem == "memory.memsw.limit_in_bytes" {
		parsedMemsw, err := units.RAMInBytes(value)
		if err != nil {
			log.Errorf("Update memory.memsw.limit_in_bytes for container %s error %v", c.ID, err)
			return err
		}
		c.Config.MemorySwap = parsedMemsw
	} else {
		log.Infof("Ignore config update container %s, subsystem %s ", c.ID, subsystem)
	}
	return nil
}

// GetSize, return real size, virtual size
func (container *Container) GetSize() (int64, int64) {
	var (
		sizeRw, sizeRootfs int64
		err                error
		driver             = container.daemon.driver
	)

	if err := container.Mount(); err != nil {
		log.Errorf("Warning: failed to compute size of container rootfs %s: %s", container.ID, err)
		return sizeRw, sizeRootfs
	}
	defer container.Unmount()

	initID := fmt.Sprintf("%s-init", container.ID)
	sizeRw, err = driver.DiffSize(container.ID, initID)
	if err != nil {
		log.Errorf("Warning: driver %s couldn't return diff size of container %s: %s", driver, container.ID, err)
		// FIXME: GetSize should return an error. Not changing it now in case
		// there is a side-effect.
		sizeRw = -1
	}

	if _, err = os.Stat(container.basefs); err != nil {
		if sizeRootfs, err = utils.TreeSize(container.basefs); err != nil {
			sizeRootfs = -1
		}
	}
	return sizeRw, sizeRootfs
}

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

	pipes := execdriver.NewPipes(execConfig.StreamConfig.stdin, execConfig.StreamConfig.stdout, execConfig.StreamConfig.stderr, execConfig.OpenStdin)
	exitCode, err = container.daemon.Exec(container, execConfig, pipes, callback)
	if err != nil {
		log.Errorf("Error running command in existing container %s: %s", container.ID, err)
	}

	log.Debugf("Exec task in container %s exited with code %d", container.ID, exitCode)
	if execConfig.OpenStdin {
		if err := execConfig.StreamConfig.stdin.Close(); err != nil {
			log.Errorf("Error closing stdin while running in %s: %s", container.ID, err)
		}
	}
	if err := execConfig.StreamConfig.stdout.Clean(); err != nil {
		log.Errorf("Error closing stdout while running in %s: %s", container.ID, err)
	}
	if err := execConfig.StreamConfig.stderr.Clean(); err != nil {
		log.Errorf("Error closing stderr while running in %s: %s", container.ID, err)
	}
	if execConfig.ProcessConfig.Terminal != nil {
		if err := execConfig.ProcessConfig.Terminal.Close(); err != nil {
			log.Errorf("Error closing terminal while running in container %s: %s", container.ID, err)
		}
	}

	return err
}

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

		fi, err := os.Stat(target)
		if err != nil {
			if os.IsNotExist(err) {
				log.Errorf("There are no more loopback devices available.")
			}
			return nil, ErrAttachLoopbackDevice
		}

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

		// OpenFile adds O_CLOEXEC
		loopFile, err = os.OpenFile(target, os.O_RDWR, 0644)
		if err != nil {
			log.Errorf("Error opening 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 != syscall.EBUSY {
				log.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 {
		log.Errorf("Unreachable code reached! Error attaching %s to a loopback device.", sparseFile.Name())
		return nil, ErrAttachLoopbackDevice
	}

	return loopFile, nil
}

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

func httpError(w http.ResponseWriter, err error) {
	statusCode := http.StatusInternalServerError
	// FIXME: this is brittle and should not be necessary.
	// If we need to differentiate between different possible error types, we should
	// create appropriate error types with clearly defined meaning.
	errStr := strings.ToLower(err.Error())
	if strings.Contains(errStr, "no such") {
		statusCode = http.StatusNotFound
	} else if strings.Contains(errStr, "bad parameter") {
		statusCode = http.StatusBadRequest
	} else if strings.Contains(errStr, "conflict") {
		statusCode = http.StatusConflict
	} else if strings.Contains(errStr, "impossible") {
		statusCode = http.StatusNotAcceptable
	} else if strings.Contains(errStr, "wrong login/password") {
		statusCode = http.StatusUnauthorized
	} else if strings.Contains(errStr, "hasn't been activated") {
		statusCode = http.StatusForbidden
	}

	if err != nil {
		log.Errorf("HTTP Error: statusCode=%d %s", statusCode, err.Error())
		http.Error(w, err.Error(), statusCode)
	}
}

func postCommit(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := parseForm(r); err != nil {
		return err
	}
	var (
		config       engine.Env
		env          engine.Env
		job          = eng.Job("commit", r.Form.Get("container"))
		stdoutBuffer = bytes.NewBuffer(nil)
	)
	if err := config.Decode(r.Body); err != nil {
		log.Errorf("%s", err)
	}

	if r.FormValue("pause") == "" && version.GreaterThanOrEqualTo("1.13") {
		job.Setenv("pause", "1")
	} else {
		job.Setenv("pause", r.FormValue("pause"))
	}

	job.Setenv("repo", r.Form.Get("repo"))
	job.Setenv("tag", r.Form.Get("tag"))
	job.Setenv("author", r.Form.Get("author"))
	job.Setenv("comment", r.Form.Get("comment"))
	job.SetenvSubEnv("config", &config)

	job.Stdout.Add(stdoutBuffer)
	if err := job.Run(); err != nil {
		return err
	}
	env.Set("Id", engine.Tail(stdoutBuffer, 1))
	return writeJSON(w, http.StatusCreated, env)
}

// Check if an image exists in the Registry
// TODO: This method should return the errors instead of masking them and returning false
func (r *Session) LookupRemoteImage(imgID, registry string, token []string) bool {

	req, err := r.reqFactory.NewRequest("GET", registry+"images/"+imgID+"/json", nil)
	if err != nil {
		log.Errorf("Error in LookupRemoteImage %s", err)
		return false
	}
	setTokenAuth(req, token)
	res, _, err := r.doRequest(req)
	if err != nil {
		log.Errorf("Error in LookupRemoteImage %s", err)
		return false
	}
	res.Body.Close()
	return res.StatusCode == 200
}

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

func wsContainersAttach(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := parseForm(r); err != nil {
		return err
	}
	if vars == nil {
		return fmt.Errorf("Missing parameter")
	}

	if err := eng.Job("container_inspect", vars["name"]).Run(); err != nil {
		return err
	}

	h := websocket.Handler(func(ws *websocket.Conn) {
		defer ws.Close()
		job := eng.Job("attach", vars["name"])
		job.Setenv("logs", r.Form.Get("logs"))
		job.Setenv("stream", r.Form.Get("stream"))
		job.Setenv("stdin", r.Form.Get("stdin"))
		job.Setenv("stdout", r.Form.Get("stdout"))
		job.Setenv("stderr", r.Form.Get("stderr"))
		job.Stdin.Add(ws)
		job.Stdout.Add(ws)
		job.Stderr.Set(ws)
		if err := job.Run(); err != nil {
			log.Errorf("Error attaching websocket: %s", err)
		}
	})
	h.ServeHTTP(w, r)

	return nil
}

func Unmap(host net.Addr) error {
	lock.Lock()
	defer lock.Unlock()

	key := getKey(host)
	data, exists := currentMappings[key]
	if !exists {
		return ErrPortNotMapped
	}

	data.userlandProxy.Stop()

	delete(currentMappings, key)

	containerIP, containerPort := getIPAndPort(data.container)
	hostIP, hostPort := getIPAndPort(data.host)
	if err := forward(iptables.Delete, data.proto, hostIP, hostPort, containerIP.String(), containerPort); err != nil {
		log.Errorf("Error on iptables delete: %s", err)
	}

	switch a := host.(type) {
	case *net.TCPAddr:
		return portallocator.ReleasePort(a.IP, "tcp", a.Port)
	case *net.UDPAddr:
		return portallocator.ReleasePort(a.IP, "udp", a.Port)
	}
	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
		log.Debugf("Calling %s %s", localMethod, localRoute)

		if logging {
			log.Infof("%s %s", 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])) {
				log.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 {
			log.Errorf("Handler for %s %s returned error: %s", localMethod, localRoute, err)
			httpError(w, err)
		}
	}
}

func (daemon *Daemon) CmdInfo(job *engine.Job) engine.Status {
	images, _ := daemon.Graph().Map()
	var imgcount int
	if images == nil {
		imgcount = 0
	} else {
		imgcount = len(images)
	}
	kernelVersion := "<unknown>"
	if kv, err := kernel.GetKernelVersion(); err == nil {
		kernelVersion = kv.String()
	}

	operatingSystem := "<unknown>"
	if s, err := operatingsystem.GetOperatingSystem(); err == nil {
		operatingSystem = s
	}
	if inContainer, err := operatingsystem.IsContainerized(); err != nil {
		log.Errorf("Could not determine if daemon is containerized: %v", err)
		operatingSystem += " (error determining if containerized)"
	} else if inContainer {
		operatingSystem += " (containerized)"
	}

	// if we still have the original dockerinit binary from before we copied it locally, let's return the path to that, since that's more intuitive (the copied path is trivial to derive by hand given VERSION)
	initPath := utils.DockerInitPath("")
	if initPath == "" {
		// if that fails, we'll just return the path from the daemon
		initPath = daemon.SystemInitPath()
	}

	cjob := job.Eng.Job("subscribers_count")
	env, _ := cjob.Stdout.AddEnv()
	if err := cjob.Run(); err != nil {
		return job.Error(err)
	}
	v := &engine.Env{}
	v.SetInt("Containers", len(daemon.List()))
	v.SetInt("Images", imgcount)
	v.Set("Driver", daemon.GraphDriver().String())
	v.SetJson("DriverStatus", daemon.GraphDriver().Status())
	v.SetBool("MemoryLimit", daemon.SystemConfig().MemoryLimit)
	v.SetBool("SwapLimit", daemon.SystemConfig().SwapLimit)
	v.SetBool("IPv4Forwarding", !daemon.SystemConfig().IPv4ForwardingDisabled)
	v.SetBool("Debug", os.Getenv("DEBUG") != "")
	v.SetInt("NFd", utils.GetTotalUsedFds())
	v.SetInt("NGoroutines", runtime.NumGoroutine())
	v.Set("ExecutionDriver", daemon.ExecutionDriver().Name())
	v.SetInt("NEventsListener", env.GetInt("count"))
	v.Set("KernelVersion", kernelVersion)
	v.Set("OperatingSystem", operatingSystem)
	v.Set("IndexServerAddress", registry.IndexServerAddress())
	v.Set("InitSha1", dockerversion.INITSHA1)
	v.Set("InitPath", initPath)
	if _, err := v.WriteTo(job.Stdout); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}

func getLoopbackBackingFile(file *os.File) (uint64, uint64, error) {
	loopInfo, err := ioctlLoopGetStatus64(file.Fd())
	if err != nil {
		log.Errorf("Error get loopback backing file: %s", err)
		return 0, 0, ErrGetLoopbackBackingFile
	}
	return loopInfo.loDevice, loopInfo.loInode, nil
}

func GetTotalUsedFds() int {
	if fds, err := ioutil.ReadDir(fmt.Sprintf("/proc/%d/fd", os.Getpid())); err != nil {
		log.Errorf("Error opening /proc/%d/fd: %s", os.Getpid(), err)
	} else {
		return len(fds)
	}
	return -1
}