func (s *DockerServer) serviceCreate(w http.ResponseWriter, r *http.Request) {
	var config swarm.ServiceSpec
	defer r.Body.Close()
	err := json.NewDecoder(r.Body).Decode(&config)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	s.cMut.Lock()
	defer s.cMut.Unlock()
	s.swarmMut.Lock()
	defer s.swarmMut.Unlock()
	if len(s.nodes) == 0 || s.swarm == nil {
		http.Error(w, "no swarm nodes available", http.StatusNotAcceptable)
		return
	}
	if config.Name == "" {
		config.Name = s.generateID()
	}
	for _, s := range s.services {
		if s.Spec.Name == config.Name {
			http.Error(w, "there's already a service with this name", http.StatusConflict)
			return
		}
	}
	service := swarm.Service{
		ID:   s.generateID(),
		Spec: config,
	}
	containerCount := 1
	if service.Spec.Mode.Global != nil {
		containerCount = len(s.nodes)
	} else if repl := service.Spec.Mode.Replicated; repl != nil {
		if repl.Replicas != nil {
			containerCount = int(*repl.Replicas)
		}
	}
	for i := 0; i < containerCount; i++ {
		container := s.containerForService(&service, fmt.Sprintf("%s-%d", config.Name, i))
		chosenNode := s.nodes[s.nodeRR]
		s.nodeRR = (s.nodeRR + 1) % len(s.nodes)
		task := swarm.Task{
			ID:        s.generateID(),
			ServiceID: service.ID,
			NodeID:    chosenNode.ID,
			Status: swarm.TaskStatus{
				State: swarm.TaskStateReady,
				ContainerStatus: swarm.ContainerStatus{
					ContainerID: container.ID,
				},
			},
			DesiredState: swarm.TaskStateReady,
			Spec:         config.TaskTemplate,
		}
		s.tasks = append(s.tasks, &task)
		s.containers = append(s.containers, container)
		s.notify(container)
	}
	s.services = append(s.services, &service)
	w.WriteHeader(http.StatusOK)
	json.NewEncoder(w).Encode(service)
}

func mergeService(spec *swarm.ServiceSpec, flags *pflag.FlagSet) error {

	mergeString := func(flag string, field *string) {
		if flags.Changed(flag) {
			*field, _ = flags.GetString(flag)
		}
	}

	mergeListOpts := func(flag string, field *[]string) {
		if flags.Changed(flag) {
			value := flags.Lookup(flag).Value.(*opts.ListOpts)
			*field = value.GetAll()
		}
	}

	mergeSlice := func(flag string, field *[]string) {
		if flags.Changed(flag) {
			*field, _ = flags.GetStringSlice(flag)
		}
	}

	mergeInt64Value := func(flag string, field *int64) {
		if flags.Changed(flag) {
			*field = flags.Lookup(flag).Value.(int64Value).Value()
		}
	}

	mergeDuration := func(flag string, field *time.Duration) {
		if flags.Changed(flag) {
			*field, _ = flags.GetDuration(flag)
		}
	}

	mergeDurationOpt := func(flag string, field *time.Duration) {
		if flags.Changed(flag) {
			*field = *flags.Lookup(flag).Value.(*DurationOpt).Value()
		}
	}

	mergeUint64 := func(flag string, field *uint64) {
		if flags.Changed(flag) {
			*field, _ = flags.GetUint64(flag)
		}
	}

	mergeUint64Opt := func(flag string, field *uint64) {
		if flags.Changed(flag) {
			*field = *flags.Lookup(flag).Value.(*Uint64Opt).Value()
		}
	}

	cspec := &spec.TaskTemplate.ContainerSpec
	task := &spec.TaskTemplate
	mergeString(flagName, &spec.Name)
	mergeLabels(flags, &spec.Labels)
	mergeString("image", &cspec.Image)
	mergeSlice("command", &cspec.Command)
	mergeSlice("arg", &cspec.Command)
	mergeListOpts("env", &cspec.Env)
	mergeString("workdir", &cspec.Dir)
	mergeString("user", &cspec.User)
	mergeMounts(flags, &cspec.Mounts)

	if flags.Changed(flagLimitCPU) || flags.Changed(flagLimitMemory) {
		if task.Resources == nil {
			task.Resources = &swarm.ResourceRequirements{}
		}
		task.Resources.Limits = &swarm.Resources{}
		mergeInt64Value(flagLimitCPU, &task.Resources.Limits.NanoCPUs)
		mergeInt64Value(flagLimitMemory, &task.Resources.Limits.MemoryBytes)

	}
	if flags.Changed(flagReserveCPU) || flags.Changed(flagReserveMemory) {
		if task.Resources == nil {
			task.Resources = &swarm.ResourceRequirements{}
		}
		task.Resources.Reservations = &swarm.Resources{}
		mergeInt64Value(flagReserveCPU, &task.Resources.Reservations.NanoCPUs)
		mergeInt64Value(flagReserveMemory, &task.Resources.Reservations.MemoryBytes)
	}

	mergeDurationOpt("stop-grace-period", cspec.StopGracePeriod)

	if flags.Changed(flagRestartCondition) || flags.Changed(flagRestartDelay) || flags.Changed(flagRestartMaxAttempts) || flags.Changed(flagRestartWindow) {
		if task.RestartPolicy == nil {
			task.RestartPolicy = &swarm.RestartPolicy{}
		}

		if flags.Changed(flagRestartCondition) {
			value, _ := flags.GetString(flagRestartCondition)
			task.RestartPolicy.Condition = swarm.RestartPolicyCondition(value)
		}
		mergeDurationOpt(flagRestartDelay, task.RestartPolicy.Delay)
		mergeUint64Opt(flagRestartMaxAttempts, task.RestartPolicy.MaxAttempts)
		mergeDurationOpt((flagRestartWindow), task.RestartPolicy.Window)
	}

	if flags.Changed(flagConstraint) {
		task.Placement = &swarm.Placement{}
		mergeSlice(flagConstraint, &task.Placement.Constraints)
//.........这里部分代码省略.........