Golang Job.Errorf方法代碼示例

func jobVersion(job *engine.Job) engine.Status {
	if _, err := dockerVersion().WriteTo(job.Stdout); err != nil {
		job.Errorf("%s", err)
		return engine.StatusErr
	}
	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("dirty") {
			b, err := json.Marshal(image)
			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)
}

// 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
}

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 {
			job.Error(err)
			return engine.StatusErr
		} else if len(output) != 0 {
			job.Errorf("Error toggle iptables forward: %s", output)
			return engine.StatusErr
		}
	}
	return engine.StatusOK
}

// Search queries the public registry for images matching the specified
// search terms, and returns the results.
//
// Argument syntax: search TERM
//
// Option environment:
//	'authConfig': json-encoded credentials to authenticate against the registry.
//		The search extends to images only accessible via the credentials.
//
//	'metaHeaders': extra HTTP headers to include in the request to the registry.
//		The headers should be passed as a json-encoded dictionary.
//
// Output:
//	Results are sent as a collection of structured messages (using engine.Table).
//	Each result is sent as a separate message.
//	Results are ordered by number of stars on the public registry.
func (s *Service) Search(job *engine.Job) engine.Status {
	if n := len(job.Args); n != 1 {
		return job.Errorf("Usage: %s TERM", job.Name)
	}
	var (
		term        = job.Args[0]
		metaHeaders = map[string][]string{}
		authConfig  = &AuthConfig{}
	)
	job.GetenvJson("authConfig", authConfig)
	job.GetenvJson("metaHeaders", metaHeaders)

	r, err := NewRegistry(authConfig, HTTPRequestFactory(metaHeaders), IndexServerAddress())
	if err != nil {
		return job.Error(err)
	}
	results, err := r.SearchRepositories(term)
	if err != nil {
		return job.Error(err)
	}
	outs := engine.NewTable("star_count", 0)
	for _, result := range results.Results {
		out := &engine.Env{}
		out.Import(result)
		outs.Add(out)
	}
	outs.ReverseSort()
	if _, err := outs.WriteListTo(job.Stdout); 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 (w *Worker) Exec(job *engine.Job) engine.Status {
	fmt.Printf("--> %v\n", job.Args)
	cmd := exec.Command(job.Args[0], job.Args[1:]...)
	cmd.Stdout = job.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		return job.Errorf("%v\n", err)
	}
	return engine.StatusOK
}

func (hc *HostContext) exec(job *engine.Job, action hostbound) (status engine.Status) {
	if hc.tunnel == nil {
		return job.Errorf("Tunnel not open to host %s(id:%s)", hc.name, hc.id)
	}

	if client, err := newDockerHttpClient("tcp://localhost:8000", "v1.10"); err == nil {
		return action(client)
	} else {
		return job.Errorf("Unable to init http client: %v", err)
	}
}

// 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 {
		b, err := json.Marshal(image)
		if err != nil {
			return job.Error(err)
		}
		job.Stdout.Write(b)
		return engine.StatusOK
	}
	return job.Errorf("No such image: %s", name)
}

// 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 := utils.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) 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 {
		if job.GetenvBool("dirty") {
			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)
		out.SetJson("HostConfig", container.hostConfig)
		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) 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 {
		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
	}
	return job.Errorf("No such container: %s", name)
}

func (srv *Server) ContainerCreate(job *engine.Job) string {
	var name string
	if len(job.Args) == 1 {
		name = job.Args[0]
	} else if len(job.Args) > 1 {
		return fmt.Sprintf("Usage: %s ", job.Name)
	}
	var config Config
	if err := job.ExportEnv(&config); err != nil {
		return err.Error()
	}
	if config.Memory != 0 && config.Memory < 524288 {
		return "Minimum memory limit allowed is 512k"
	}
	if config.Memory > 0 && !srv.runtime.capabilities.MemoryLimit {
		config.Memory = 0
	}
	if config.Memory > 0 && !srv.runtime.capabilities.SwapLimit {
		config.MemorySwap = -1
	}
	container, buildWarnings, err := srv.runtime.Create(&config, name)
	if err != nil {
		if srv.runtime.graph.IsNotExist(err) {
			_, tag := utils.ParseRepositoryTag(config.Image)
			if tag == "" {
				tag = DEFAULTTAG
			}
			return fmt.Sprintf("No such image: %s (tag: %s)", config.Image, tag)
		}
		return err.Error()
	}
	srv.LogEvent("create", container.ID, srv.runtime.repositories.ImageName(container.Image))
	// FIXME: this is necessary because runtime.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 "0"
}

// release an interface for a select ip
func Release(job *engine.Job) engine.Status {
	var (
		id                 = job.Args[0]
		containerInterface = currentInterfaces.Get(id)
	)

	if containerInterface == nil {
		return job.Errorf("No network information to release for %s", id)
	}

	for _, nat := range containerInterface.PortMappings {
		if err := portmapper.Unmap(nat); err != nil {
			log.Printf("Unable to unmap port %s: %s", nat, err)
		}
	}

	if err := ipallocator.ReleaseIP(bridgeNetwork, &containerInterface.IP); err != nil {
		log.Printf("Unable to release ip %s\n", err)
	}
	return engine.StatusOK
}

// release an interface for a select ip
func Release(job *engine.Job) engine.Status {
	var (
		id                 = job.Args[0]
		containerInterface = currentInterfaces.Get(id)
		ip                 net.IP
		port               int
		proto              string
	)

	if containerInterface == nil {
		return job.Errorf("No network information to release for %s", id)
	}

	for _, nat := range containerInterface.PortMappings {
		if err := portmapper.Unmap(nat); err != nil {
			log.Printf("Unable to unmap port %s: %s", nat, err)
		}

		// this is host mappings
		switch a := nat.(type) {
		case *net.TCPAddr:
			proto = "tcp"
			ip = a.IP
			port = a.Port
		case *net.UDPAddr:
			proto = "udp"
			ip = a.IP
			port = a.Port
		}

		if err := portallocator.ReleasePort(ip, proto, port); err != nil {
			log.Printf("Unable to release port %s", nat)
		}
	}

	if err := ipallocator.ReleaseIP(bridgeNetwork, &containerInterface.IP); err != nil {
		log.Printf("Unable to release ip %s\n", err)
	}
	return engine.StatusOK
}