Golang Job.Error方法代碼示例

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.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 := 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) 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 := 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)
}

// 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)
}

// 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
}

// 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.Infof("Listening for HTTP on %s (%s)", 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
}

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 (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
}

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.Set("Id", container.ID)
		out.SetAuto("Created", container.Created)
		out.Set("Path", container.Path)
		out.SetList("Args", container.Args)
		out.SetJson("Config", container.Config)
		out.SetJson("State", container.State)
		out.Set("Image", container.Image)
		out.SetJson("NetworkSettings", container.NetworkSettings)
		out.Set("ResolvConfPath", container.ResolvConfPath)
		out.Set("HostnamePath", container.HostnamePath)
		out.Set("HostsPath", container.HostsPath)
		out.Set("Name", container.Name)
		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)

		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)
}

// FIXME: merge into CmdTag above, and merge "image_tag" and "tag" into a single job.
func (s *TagStore) CmdTagLegacy(job *engine.Job) engine.Status {
	if len(job.Args) != 2 && len(job.Args) != 3 {
		return job.Errorf("Usage: %s IMAGE REPOSITORY [TAG]\n", job.Name)
	}
	var tag string
	if len(job.Args) == 3 {
		tag = job.Args[2]
	}
	if err := s.Set(job.Args[1], tag, job.Args[0], job.GetenvBool("force")); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}

// CmdTag assigns a new name and tag to an existing image. If the tag already exists,
// it is changed and the image previously referenced by the tag loses that reference.
// This may cause the old image to be garbage-collected if its reference count reaches zero.
//
// Syntax: image_tag NEWNAME OLDNAME
// Example: image_tag shykes/myapp:latest shykes/myapp:1.42.0
func (s *TagStore) CmdTag(job *engine.Job) engine.Status {
	if len(job.Args) != 2 {
		return job.Errorf("usage: %s NEWNAME OLDNAME", job.Name)
	}
	var (
		newName = job.Args[0]
		oldName = job.Args[1]
	)
	newRepo, newTag := parsers.ParseRepositoryTag(newName)
	// FIXME: Set should either parse both old and new name, or neither.
	// 	the current prototype is inconsistent.
	if err := s.Set(newRepo, newTag, oldName, true); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}

func (daemon *Daemon) ImageDelete(job *engine.Job) engine.Status {
	if n := len(job.Args); n != 1 {
		return job.Errorf("Usage: %s IMAGE", job.Name)
	}
	imgs := engine.NewTable("", 0)
	if err := daemon.DeleteImage(job.Eng, job.Args[0], imgs, true, job.GetenvBool("force"), job.GetenvBool("noprune")); err != nil {
		return job.Error(err)
	}
	if len(imgs.Data) == 0 {
		return job.Errorf("Conflict, %s wasn't deleted", job.Args[0])
	}
	if _, err := imgs.WriteListTo(job.Stdout); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}

// builtins jobs independent of any subsystem
func dockerVersion(job *engine.Job) engine.Status {
	v := &engine.Env{}
	v.SetJson("Version", dockerversion.VERSION)
	v.SetJson("ApiVersion", api.APIVERSION)
	v.Set("GitCommit", dockerversion.GITCOMMIT)
	v.Set("GoVersion", runtime.Version())
	v.Set("Os", runtime.GOOS)
	v.Set("Arch", runtime.GOARCH)
	if kernelVersion, err := kernel.GetKernelVersion(); err == nil {
		v.Set("KernelVersion", kernelVersion.String())
	}
	if _, err := v.WriteTo(job.Stdout); err != nil {
		return job.Error(err)
	}
	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 < 524288 {
		return job.Errorf("Minimum memory limit allowed is 512k")
	}
	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
	}
	container, buildWarnings, err := daemon.Create(config, 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")
	// FIXME: this is necessary because daemon.Create might return a nil container
	// with a non-nil error. This should not happen! Once it's fixed we
	// can remove this workaround.
	if container != nil {
		job.Printf("%s\n", container.ID)
	}
	for _, warning := range buildWarnings {
		job.Errorf("%s\n", warning)
	}
	return engine.StatusOK
}

func LinkContainers(job *engine.Job) engine.Status {
	var (
		action       = job.Args[0]
		childIP      = job.Getenv("ChildIP")
		parentIP     = job.Getenv("ParentIP")
		ignoreErrors = job.GetenvBool("IgnoreErrors")
		ports        = job.GetenvList("Ports")
	)
	split := func(p string) (string, string) {
		parts := strings.Split(p, "/")
		return parts[0], parts[1]
	}

	for _, p := range ports {
		port, proto := split(p)
		if output, err := iptables.Raw(action, "FORWARD",
			"-i", bridgeIface, "-o", bridgeIface,
			"-p", proto,
			"-s", parentIP,
			"--dport", port,
			"-d", childIP,
			"-j", "ACCEPT"); !ignoreErrors && err != nil {
			return job.Error(err)
		} else if len(output) != 0 {
			return job.Errorf("Error toggle iptables forward: %s", output)
		}

		if output, err := iptables.Raw(action, "FORWARD",
			"-i", bridgeIface, "-o", bridgeIface,
			"-p", proto,
			"-s", childIP,
			"--sport", port,
			"-d", parentIP,
			"-j", "ACCEPT"); !ignoreErrors && err != nil {
			return job.Error(err)
		} else if len(output) != 0 {
			return job.Errorf("Error toggle iptables forward: %s", output)
		}
	}
	return engine.StatusOK
}

func (daemon *Daemon) ContainerChanges(job *engine.Job) engine.Status {
	if n := len(job.Args); n != 1 {
		return job.Errorf("Usage: %s CONTAINER", job.Name)
	}
	name := job.Args[0]
	if container := daemon.Get(name); container != nil {
		outs := engine.NewTable("", 0)
		changes, err := container.Changes()
		if err != nil {
			return job.Error(err)
		}
		for _, change := range changes {
			out := &engine.Env{}
			if err := out.Import(change); err != nil {
				return job.Error(err)
			}
			outs.Add(out)
		}
		if _, err := outs.WriteListTo(job.Stdout); err != nil {
			return job.Error(err)
		}
	} else {
		return job.Errorf("No such container: %s", name)
	}
	return engine.StatusOK
}