Golang Job.Error方法代码示例

// Allocate a network interface
func Allocate(job *engine.Job) engine.Status {
	var (
		ip          *net.IP
		err         error
		id          = job.Args[0]
		requestedIP = net.ParseIP(job.Getenv("RequestedIP"))
	)

	if requestedIP != nil {
		ip, err = ipallocator.RequestIP(bridgeNetwork, &requestedIP)
	} else {
		ip, err = ipallocator.RequestIP(bridgeNetwork, nil)
	}
	if err != nil {
		return job.Error(err)
	}

	out := engine.Env{}
	out.Set("IP", ip.String())
	out.Set("Mask", bridgeNetwork.Mask.String())
	out.Set("Gateway", bridgeNetwork.IP.String())
	out.Set("Bridge", bridgeIface)

	size, _ := bridgeNetwork.Mask.Size()
	out.SetInt("IPPrefixLen", size)

	currentInterfaces.Set(id, &networkInterface{
		IP: *ip,
	})

	out.WriteTo(job.Stdout)

	return engine.StatusOK
}

func (daemon *Daemon) ContainerExport(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("Usage: %s container_id", job.Name)
	}
	name := job.Args[0]

	container, err := daemon.Get(name)
	if err != nil {
		return job.Error(err)
	}

	data, err := container.Export()
	if err != nil {
		return job.Errorf("%s: %s", name, err)
	}
	defer data.Close()

	// Stream the entire contents of the container (basically a volatile snapshot)
	if _, err := io.Copy(job.Stdout, data); err != nil {
		return job.Errorf("%s: %s", name, err)
	}
	// FIXME: factor job-specific LogEvent to engine.Job.Run()
	container.LogEvent("export")
	return engine.StatusOK
}

func (srv *Server) ContainerCopy(job *engine.Job) engine.Status {
	if len(job.Args) != 2 {
		return job.Errorf("Usage: %s CONTAINER RESOURCE\n", job.Name)
	}

	var (
		name     = job.Args[0]
		resource = job.Args[1]
	)

	if container := srv.daemon.Get(name); container != nil {

		data, err := container.Copy(resource)
		if err != nil {
			return job.Error(err)
		}
		defer data.Close()

		if _, err := io.Copy(job.Stdout, data); err != nil {
			return job.Error(err)
		}
		return engine.StatusOK
	}
	return job.Errorf("No such container: %s", name)
}

// ServeApi loops through all of the protocols sent in to docker and spawns
// off a go routine to setup a serving http.Server for each.
func ServeApi(job *engine.Job) engine.Status {
	if len(job.Args) == 0 {
		return job.Errorf("usage: %s PROTO://ADDR [PROTO://ADDR ...]", job.Name)
	}
	var (
		protoAddrs = job.Args
		chErrors   = make(chan error, len(protoAddrs))
	)
	activationLock = make(chan struct{})

	for _, protoAddr := range protoAddrs {
		protoAddrParts := strings.SplitN(protoAddr, "://", 2)
		if len(protoAddrParts) != 2 {
			return job.Errorf("usage: %s PROTO://ADDR [PROTO://ADDR ...]", job.Name)
		}
		go func() {
			log.Printf("Listening for HTTP on %s (%s)\n", protoAddrParts[0], protoAddrParts[1])
			chErrors <- ListenAndServe(protoAddrParts[0], protoAddrParts[1], job)
		}()
	}

	for i := 0; i < len(protoAddrs); i += 1 {
		err := <-chErrors
		if err != nil {
			return job.Error(err)
		}
	}

	return engine.StatusOK
}

// CmdLookup return an image encoded in JSON
func (s *TagStore) CmdLookup(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	if image, err := s.LookupImage(name); err == nil && image != nil {
		if job.GetenvBool("raw") {
			b, err := image.RawJson()
			if err != nil {
				return job.Error(err)
			}
			job.Stdout.Write(b)
			return engine.StatusOK
		}

		out := &engine.Env{}
		out.Set("Id", image.ID)
		out.Set("Parent", image.Parent)
		out.Set("Comment", image.Comment)
		out.SetAuto("Created", image.Created)
		out.Set("Container", image.Container)
		out.SetJson("ContainerConfig", image.ContainerConfig)
		out.Set("DockerVersion", image.DockerVersion)
		out.Set("Author", image.Author)
		out.SetJson("Config", image.Config)
		out.Set("Architecture", image.Architecture)
		out.Set("Os", image.OS)
		out.SetInt64("Size", image.Size)
		if _, err = out.WriteTo(job.Stdout); err != nil {
			return job.Error(err)
		}
		return engine.StatusOK
	}
	return job.Errorf("No such image: %s", name)
}

func (daemon *Daemon) ContainerStart(job *engine.Job) engine.Status {
	if len(job.Args) < 1 {
		return job.Errorf("Usage: %s container_id", job.Name)
	}
	var (
		name      = job.Args[0]
		container = daemon.Get(name)
	)

	if container == nil {
		return job.Errorf("No such container: %s", name)
	}

	if container.IsRunning() {
		return job.Errorf("Container already started")
	}

	// If no environment was set, then no hostconfig was passed.
	// This is kept for backward compatibility - hostconfig should be passed when
	// creating a container, not during start.
	if len(job.Environ()) > 0 {
		hostConfig := runconfig.ContainerHostConfigFromJob(job)
		if err := daemon.setHostConfig(container, hostConfig); err != nil {
			return job.Error(err)
		}
	}
	if err := container.Start(); err != nil {
		container.LogEvent("die")
		return job.Errorf("Cannot start container %s: %s", name, err)
	}

	return engine.StatusOK
}

func (daemon *Daemon) ContainerRename(job *engine.Job) engine.Status {
	if len(job.Args) != 2 {
		return job.Errorf("usage: %s OLD_NAME NEW_NAME", job.Name)
	}
	oldName := job.Args[0]
	newName := job.Args[1]

	container, err := daemon.Get(oldName)
	if err != nil {
		return job.Error(err)
	}

	oldName = container.Name

	container.Lock()
	defer container.Unlock()
	if newName, err = daemon.reserveName(container.ID, newName); err != nil {
		return job.Errorf("Error when allocating new name: %s", err)
	}

	container.Name = newName

	if err := daemon.containerGraph.Delete(oldName); err != nil {
		return job.Errorf("Failed to delete container %q: %v", oldName, err)
	}

	return engine.StatusOK
}

func (daemon *Daemon) ContainerStart(job *engine.Job) engine.Status {
	if len(job.Args) < 1 {
		return job.Errorf("Usage: %s container_id", job.Name)
	}
	var (
		name      = job.Args[0]
		container = daemon.Get(name)
	)

	if container == nil {
		return job.Errorf("No such container: %s", name)
	}

	if container.IsRunning() {
		return job.Errorf("Container already started")
	}

	// If no environment was set, then no hostconfig was passed.
	if len(job.Environ()) > 0 {
		hostConfig := runconfig.ContainerHostConfigFromJob(job)
		if err := daemon.setHostConfig(container, hostConfig); err != nil {
			return job.Error(err)
		}
	}
	if err := container.Start(); err != nil {
		return job.Errorf("Cannot start container %s: %s", name, err)
	}

	return engine.StatusOK
}

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 {
		utils.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)
	v.SetList("Sockets", daemon.Sockets)
	if _, err := v.WriteTo(job.Stdout); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}

func (srv *Server) ContainerStart(job *engine.Job) engine.Status {
	if len(job.Args) < 1 {
		return job.Errorf("Usage: %s container_id", job.Name)
	}
	var (
		name      = job.Args[0]
		daemon    = srv.daemon
		container = daemon.Get(name)
	)

	if container == nil {
		return job.Errorf("No such container: %s", name)
	}

	if container.State.IsRunning() {
		return job.Errorf("Container already started")
	}

	// If no environment was set, then no hostconfig was passed.
	if len(job.Environ()) > 0 {
		hostConfig := runconfig.ContainerHostConfigFromJob(job)
		if err := srv.setHostConfig(container, hostConfig); err != nil {
			return job.Error(err)
		}
	}
	if err := container.Start(); err != nil {
		return job.Errorf("Cannot start container %s: %s", name, err)
	}
	srv.LogEvent("start", container.ID, daemon.Repositories().ImageName(container.Image))

	return engine.StatusOK
}

func (daemon *Daemon) ContainerInspect(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("usage: %s NAME", job.Name)
	}
	name := job.Args[0]
	if container := daemon.Get(name); container != nil {
		container.Lock()
		defer container.Unlock()
		if job.GetenvBool("raw") {
			b, err := json.Marshal(&struct {
				*Container
				HostConfig *runconfig.HostConfig
			}{container, container.hostConfig})
			if err != nil {
				return job.Error(err)
			}
			job.Stdout.Write(b)
			return engine.StatusOK
		}

		out := &engine.Env{}
		out.SetJson("Id", container.ID)
		out.SetAuto("Created", container.Created)
		out.SetJson("Path", container.Path)
		out.SetList("Args", container.Args)
		out.SetJson("Config", container.Config)
		out.SetJson("State", container.State)
		out.Set("Image", container.ImageID)
		out.SetJson("NetworkSettings", container.NetworkSettings)
		out.Set("ResolvConfPath", container.ResolvConfPath)
		out.Set("HostnamePath", container.HostnamePath)
		out.Set("HostsPath", container.HostsPath)
		out.SetJson("Name", container.Name)
		out.SetInt("RestartCount", container.RestartCount)
		out.Set("Driver", container.Driver)
		out.Set("ExecDriver", container.ExecDriver)
		out.Set("MountLabel", container.MountLabel)
		out.Set("ProcessLabel", container.ProcessLabel)
		out.SetJson("Volumes", container.Volumes)
		out.SetJson("VolumesRW", container.VolumesRW)
		out.SetJson("AppArmorProfile", container.AppArmorProfile)

		out.SetList("ExecIDs", container.GetExecIDs())

		if children, err := daemon.Children(container.Name); err == nil {
			for linkAlias, child := range children {
				container.hostConfig.Links = append(container.hostConfig.Links, fmt.Sprintf("%s:%s", child.Name, linkAlias))
			}
		}

		out.SetJson("HostConfig", container.hostConfig)

		container.hostConfig.Links = nil
		if _, err := out.WriteTo(job.Stdout); err != nil {
			return job.Error(err)
		}
		return engine.StatusOK
	}
	return job.Errorf("No such container: %s", name)
}

func (daemon *Daemon) ContainerRm(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("Not enough arguments. Usage: %s CONTAINER\n", job.Name)
	}
	name := job.Args[0]
	removeVolume := job.GetenvBool("removeVolume")
	removeLink := job.GetenvBool("removeLink")
	forceRemove := job.GetenvBool("forceRemove")
	container := daemon.Get(name)

	if container == nil {
		return job.Errorf("No such container: %s", name)
	}

	if removeLink {
		name, err := GetFullContainerName(name)
		if err != nil {
			job.Error(err)
		}
		parent, n := path.Split(name)
		if parent == "/" {
			return job.Errorf("Conflict, cannot remove the default name of the container")
		}
		pe := daemon.ContainerGraph().Get(parent)
		if pe == nil {
			return job.Errorf("Cannot get parent %s for name %s", parent, name)
		}
		parentContainer := daemon.Get(pe.ID())

		if parentContainer != nil {
			parentContainer.DisableLink(n)
		}

		if err := daemon.ContainerGraph().Delete(name); err != nil {
			return job.Error(err)
		}
		return engine.StatusOK
	}

	if container != nil {
		if container.IsRunning() {
			if forceRemove {
				if err := container.Kill(); err != nil {
					return job.Errorf("Could not kill running container, cannot remove - %v", err)
				}
			} else {
				return job.Errorf("Conflict, You cannot remove a running container. Stop the container before attempting removal or use -f")
			}
		}
		if err := daemon.Destroy(container); err != nil {
			return job.Errorf("Cannot destroy container %s: %s", name, err)
		}
		container.LogEvent("destroy")
		if removeVolume {
			daemon.DeleteVolumes(container.VolumePaths())
		}
	}
	return engine.StatusOK
}

func (srv *Server) Events(job *engine.Job) engine.Status {
	if len(job.Args) != 0 {
		return job.Errorf("Usage: %s", job.Name)
	}

	var (
		since   = job.GetenvInt64("since")
		until   = job.GetenvInt64("until")
		timeout = time.NewTimer(time.Unix(until, 0).Sub(time.Now()))
	)

	// If no until, disable timeout
	if until == 0 {
		timeout.Stop()
	}

	listener := make(chan utils.JSONMessage)
	srv.eventPublisher.Subscribe(listener)
	defer srv.eventPublisher.Unsubscribe(listener)

	// When sending an event JSON serialization errors are ignored, but all
	// other errors lead to the eviction of the listener.
	sendEvent := func(event *utils.JSONMessage) error {
		if b, err := json.Marshal(event); err == nil {
			if _, err = job.Stdout.Write(b); err != nil {
				return err
			}
		}
		return nil
	}

	job.Stdout.Write(nil)

	// Resend every event in the [since, until] time interval.
	if since != 0 {
		for _, event := range srv.GetEvents() {
			if event.Time >= since && (event.Time <= until || until == 0) {
				if err := sendEvent(&event); err != nil {
					return job.Error(err)
				}
			}
		}
	}

	for {
		select {
		case event, ok := <-listener:
			if !ok {
				return engine.StatusOK
			}
			if err := sendEvent(&event); err != nil {
				return job.Error(err)
			}
		case <-timeout.C:
			return engine.StatusOK
		}
	}
}

func (daemon *Daemon) ContainerCreate(job *engine.Job) engine.Status {
	var name string
	if len(job.Args) == 1 {
		name = job.Args[0]
	} else if len(job.Args) > 1 {
		return job.Errorf("Usage: %s", job.Name)
	}
	config := runconfig.ContainerConfigFromJob(job)
	if config.Memory != 0 && config.Memory < 4194304 {
		return job.Errorf("Minimum memory limit allowed is 4MB")
	}
	if config.Memory > 0 && !daemon.SystemConfig().MemoryLimit {
		job.Errorf("Your kernel does not support memory limit capabilities. Limitation discarded.\n")
		config.Memory = 0
	}
	if config.Memory > 0 && !daemon.SystemConfig().SwapLimit {
		job.Errorf("Your kernel does not support swap limit capabilities. Limitation discarded.\n")
		config.MemorySwap = -1
	}
	if config.Memory > 0 && config.MemorySwap > 0 && config.MemorySwap < config.Memory {
		return job.Errorf("Minimum memoryswap limit should be larger than memory limit, see usage.\n")
	}
	if config.Memory == 0 && config.MemorySwap > 0 {
		return job.Errorf("You should always set the Memory limit when using Memoryswap limit, see usage.\n")
	}

	var hostConfig *runconfig.HostConfig
	if job.EnvExists("HostConfig") {
		hostConfig = runconfig.ContainerHostConfigFromJob(job)
	} else {
		// Older versions of the API don't provide a HostConfig.
		hostConfig = nil
	}

	container, buildWarnings, err := daemon.Create(config, hostConfig, name)
	if err != nil {
		if daemon.Graph().IsNotExist(err) {
			_, tag := parsers.ParseRepositoryTag(config.Image)
			if tag == "" {
				tag = graph.DEFAULTTAG
			}
			return job.Errorf("No such image: %s (tag: %s)", config.Image, tag)
		}
		return job.Error(err)
	}
	if !container.Config.NetworkDisabled && daemon.SystemConfig().IPv4ForwardingDisabled {
		job.Errorf("IPv4 forwarding is disabled.\n")
	}
	container.LogEvent("create")

	job.Printf("%s\n", container.ID)

	for _, warning := range buildWarnings {
		job.Errorf("%s\n", warning)
	}

	return engine.StatusOK
}

func (s *TagStore) CmdPull(job *engine.Job) engine.Status {
	if n := len(job.Args); n != 1 && n != 2 {
		return job.Errorf("Usage: %s IMAGE [TAG]", job.Name)
	}
	var (
		localName   = job.Args[0]
		tag         string
		sf          = utils.NewStreamFormatter(job.GetenvBool("json"))
		authConfig  = &registry.AuthConfig{}
		metaHeaders map[string][]string
	)
	if len(job.Args) > 1 {
		tag = job.Args[1]
	}

	job.GetenvJson("authConfig", authConfig)
	job.GetenvJson("metaHeaders", &metaHeaders)

	c, err := s.poolAdd("pull", localName+":"+tag)
	if err != nil {
		if c != nil {
			// Another pull of the same repository is already taking place; just wait for it to finish
			job.Stdout.Write(sf.FormatStatus("", "Repository %s already being pulled by another client. Waiting.", localName))
			<-c
			return engine.StatusOK
		}
		return job.Error(err)
	}
	defer s.poolRemove("pull", localName+":"+tag)

	// Resolve the Repository name from fqn to endpoint + name
	hostname, remoteName, err := registry.ResolveRepositoryName(localName)
	if err != nil {
		return job.Error(err)
	}

	endpoint, err := registry.ExpandAndVerifyRegistryUrl(hostname)
	if err != nil {
		return job.Error(err)
	}

	r, err := registry.NewSession(authConfig, registry.HTTPRequestFactory(metaHeaders), endpoint, true)
	if err != nil {
		return job.Error(err)
	}

	if endpoint == registry.IndexServerAddress() {
		// If pull "index.docker.io/foo/bar", it's stored locally under "foo/bar"
		localName = remoteName
	}

	if err = s.pullRepository(r, job.Stdout, localName, remoteName, tag, sf, job.GetenvBool("parallel")); err != nil {
		return job.Error(err)
	}

	return engine.StatusOK
}