Golang Job.Errorf方法代碼示例

// 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 (s *TagStore) CmdViz(job *engine.Job) engine.Status {
	images, _ := s.graph.Map()
	if images == nil {
		return engine.StatusOK
	}
	job.Stdout.Write([]byte("digraph docker {\n"))

	var (
		parentImage *image.Image
		err         error
	)
	for _, image := range images {
		parentImage, err = image.GetParent()
		if err != nil {
			return job.Errorf("Error while getting parent image: %v", err)
		}
		if parentImage != nil {
			job.Stdout.Write([]byte(" \"" + parentImage.ID + "\" -> \"" + image.ID + "\"\n"))
		} else {
			job.Stdout.Write([]byte(" base -> \"" + image.ID + "\" [style=invis]\n"))
		}
	}

	for id, repos := range s.GetRepoRefs() {
		job.Stdout.Write([]byte(" \"" + id + "\" [label=\"" + id + "\\n" + strings.Join(repos, "\\n") + "\",shape=box,fillcolor=\"paleturquoise\",style=\"filled,rounded\"];\n"))
	}
	job.Stdout.Write([]byte(" base [style=invisible]\n}\n"))
	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) 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
}

func (daemon *Daemon) ContainerCommit(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]

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

	var (
		config    = container.Config
		newConfig runconfig.Config
	)

	if err := job.GetenvJson("config", &newConfig); err != nil {
		return job.Error(err)
	}

	if err := runconfig.Merge(&newConfig, config); err != nil {
		return job.Error(err)
	}

	img, err := daemon.Commit(container, job.Getenv("repo"), job.Getenv("tag"), job.Getenv("comment"), job.Getenv("author"), job.GetenvBool("pause"), &newConfig)
	if err != nil {
		return job.Error(err)
	}
	job.Printf("%s\n", img.ID)
	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)
}

// FIXME: Allow to interrupt current push when new push of same image is done.
func (s *TagStore) CmdPush(job *engine.Job) engine.Status {
	if n := len(job.Args); n != 1 {
		return job.Errorf("Usage: %s IMAGE", job.Name)
	}
	var (
		localName   = job.Args[0]
		sf          = utils.NewStreamFormatter(job.GetenvBool("json"))
		authConfig  = &registry.AuthConfig{}
		metaHeaders map[string][]string
	)

	tag := job.Getenv("tag")
	job.GetenvJson("authConfig", authConfig)
	job.GetenvJson("metaHeaders", &metaHeaders)
	if _, err := s.poolAdd("push", localName); err != nil {
		return job.Error(err)
	}
	defer s.poolRemove("push", localName)

	// 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)
	}

	img, err := s.graph.Get(localName)
	r, err2 := registry.NewSession(authConfig, registry.HTTPRequestFactory(metaHeaders), endpoint, false)
	if err2 != nil {
		return job.Error(err2)
	}

	if err != nil {
		reposLen := 1
		if tag == "" {
			reposLen = len(s.Repositories[localName])
		}
		job.Stdout.Write(sf.FormatStatus("", "The push refers to a repository [%s] (len: %d)", localName, reposLen))
		// If it fails, try to get the repository
		if localRepo, exists := s.Repositories[localName]; exists {
			if err := s.pushRepository(r, job.Stdout, localName, remoteName, localRepo, tag, sf); err != nil {
				return job.Error(err)
			}
			return engine.StatusOK
		}
		return job.Error(err)
	}

	var token []string
	job.Stdout.Write(sf.FormatStatus("", "The push refers to an image: [%s]", localName))
	if _, err := s.pushImage(r, job.Stdout, remoteName, img.ID, endpoint, token, sf); err != nil {
		return job.Error(err)
	}
	return engine.StatusOK
}

func (e *Events) Log(job *engine.Job) engine.Status {
	if len(job.Args) != 3 {
		return job.Errorf("usage: %s ACTION ID FROM", job.Name)
	}
	// not waiting for receivers
	go e.log(job.Args[0], job.Args[1], job.Args[2])
	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)
}

func (daemon *Daemon) ContainerWait(job *engine.Job) engine.Status {
	if len(job.Args) != 1 {
		return job.Errorf("Usage: %s", job.Name)
	}
	name := job.Args[0]
	if container := daemon.Get(name); container != nil {
		status, _ := container.State.WaitStop(-1 * time.Second)
		job.Printf("%d\n", status)
		return engine.StatusOK
	}
	return job.Errorf("%s: no such container: %s", job.Name, 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
}

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 (s *TagStore) CmdImport(job *engine.Job) engine.Status {
	if n := len(job.Args); n != 2 && n != 3 {
		return job.Errorf("Usage: %s SRC REPO [TAG]", job.Name)
	}
	var (
		src     = job.Args[0]
		repo    = job.Args[1]
		tag     string
		sf      = utils.NewStreamFormatter(job.GetenvBool("json"))
		archive archive.ArchiveReader
		resp    *http.Response
	)
	if len(job.Args) > 2 {
		tag = job.Args[2]
	}

	if src == "-" {
		archive = job.Stdin
	} else {
		u, err := url.Parse(src)
		if err != nil {
			return job.Error(err)
		}
		if u.Scheme == "" {
			u.Scheme = "http"
			u.Host = src
			u.Path = ""
		}
		job.Stdout.Write(sf.FormatStatus("", "Downloading from %s", u))
		resp, err = utils.Download(u.String())
		if err != nil {
			return job.Error(err)
		}
		progressReader := utils.ProgressReader(resp.Body, int(resp.ContentLength), job.Stdout, sf, true, "", "Importing")
		defer progressReader.Close()
		archive = progressReader
	}
	img, err := s.graph.Create(archive, "", "", "Imported from "+src, "", nil, nil)
	if err != nil {
		return job.Error(err)
	}
	// Optionally register the image at REPO/TAG
	if repo != "" {
		if err := s.Set(repo, tag, img.ID, true); err != nil {
			return job.Error(err)
		}
	}
	job.Stdout.Write(sf.FormatStatus("", img.ID))
	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
}