func containerSpecFromGRPC(c *swarmapi.ContainerSpec) types.ContainerSpec {
	containerSpec := types.ContainerSpec{
		Image:    c.Image,
		Labels:   c.Labels,
		Command:  c.Command,
		Args:     c.Args,
		Hostname: c.Hostname,
		Env:      c.Env,
		Dir:      c.Dir,
		User:     c.User,
		Groups:   c.Groups,
		TTY:      c.TTY,
	}

	// Mounts
	for _, m := range c.Mounts {
		mount := mounttypes.Mount{
			Target:   m.Target,
			Source:   m.Source,
			Type:     mounttypes.Type(strings.ToLower(swarmapi.Mount_MountType_name[int32(m.Type)])),
			ReadOnly: m.ReadOnly,
		}

		if m.BindOptions != nil {
			mount.BindOptions = &mounttypes.BindOptions{
				Propagation: mounttypes.Propagation(strings.ToLower(swarmapi.Mount_BindOptions_MountPropagation_name[int32(m.BindOptions.Propagation)])),
			}
		}

		if m.VolumeOptions != nil {
			mount.VolumeOptions = &mounttypes.VolumeOptions{
				NoCopy: m.VolumeOptions.NoCopy,
				Labels: m.VolumeOptions.Labels,
			}
			if m.VolumeOptions.DriverConfig != nil {
				mount.VolumeOptions.DriverConfig = &mounttypes.Driver{
					Name:    m.VolumeOptions.DriverConfig.Name,
					Options: m.VolumeOptions.DriverConfig.Options,
				}
			}
		}
		containerSpec.Mounts = append(containerSpec.Mounts, mount)
	}

	if c.StopGracePeriod != nil {
		grace, _ := ptypes.Duration(c.StopGracePeriod)
		containerSpec.StopGracePeriod = &grace
	}

	if c.Healthcheck != nil {
		containerSpec.Healthcheck = healthConfigFromGRPC(c.Healthcheck)
	}

	return containerSpec
}

func updateHealthcheck(flags *pflag.FlagSet, containerSpec *swarm.ContainerSpec) error {
	if !anyChanged(flags, flagNoHealthcheck, flagHealthCmd, flagHealthInterval, flagHealthRetries, flagHealthTimeout) {
		return nil
	}
	if containerSpec.Healthcheck == nil {
		containerSpec.Healthcheck = &container.HealthConfig{}
	}
	noHealthcheck, err := flags.GetBool(flagNoHealthcheck)
	if err != nil {
		return err
	}
	if noHealthcheck {
		if !anyChanged(flags, flagHealthCmd, flagHealthInterval, flagHealthRetries, flagHealthTimeout) {
			containerSpec.Healthcheck = &container.HealthConfig{
				Test: []string{"NONE"},
			}
			return nil
		}
		return fmt.Errorf("--%s conflicts with --health-* options", flagNoHealthcheck)
	}
	if len(containerSpec.Healthcheck.Test) > 0 && containerSpec.Healthcheck.Test[0] == "NONE" {
		containerSpec.Healthcheck.Test = nil
	}
	if flags.Changed(flagHealthInterval) {
		val := *flags.Lookup(flagHealthInterval).Value.(*PositiveDurationOpt).Value()
		containerSpec.Healthcheck.Interval = val
	}
	if flags.Changed(flagHealthTimeout) {
		val := *flags.Lookup(flagHealthTimeout).Value.(*PositiveDurationOpt).Value()
		containerSpec.Healthcheck.Timeout = val
	}
	if flags.Changed(flagHealthRetries) {
		containerSpec.Healthcheck.Retries, _ = flags.GetInt(flagHealthRetries)
	}
	if flags.Changed(flagHealthCmd) {
		cmd, _ := flags.GetString(flagHealthCmd)
		if cmd != "" {
			containerSpec.Healthcheck.Test = []string{"CMD-SHELL", cmd}
		} else {
			containerSpec.Healthcheck.Test = nil
		}
	}
	return nil
}