Golang HostConfig.Links方法代码示例

func (s *Service) populateAdditionalHostConfig(hostConfig *containertypes.HostConfig) error {
	links, err := s.getLinks()
	if err != nil {
		return err
	}

	for _, link := range s.DependentServices() {
		if !s.project.ServiceConfigs.Has(link.Target) {
			continue
		}

		service, err := s.project.CreateService(link.Target)
		if err != nil {
			return err
		}

		containers, err := service.Containers(context.Background())
		if err != nil {
			return err
		}

		if link.Type == project.RelTypeIpcNamespace {
			hostConfig, err = addIpc(hostConfig, service, containers, s.serviceConfig.Ipc)
		} else if link.Type == project.RelTypeNetNamespace {
			hostConfig, err = addNetNs(hostConfig, service, containers, s.serviceConfig.NetworkMode)
		}

		if err != nil {
			return err
		}
	}

	hostConfig.Links = []string{}
	for k, v := range links {
		hostConfig.Links = append(hostConfig.Links, strings.Join([]string{v, k}, ":"))
	}
	for _, v := range s.serviceConfig.ExternalLinks {
		hostConfig.Links = append(hostConfig.Links, v)
	}

	return nil
}

// registerLinks writes the links to a file.
func (daemon *Daemon) registerLinks(container *container.Container, hostConfig *containertypes.HostConfig) error {
	if hostConfig == nil || hostConfig.Links == nil {
		return nil
	}

	for _, l := range hostConfig.Links {
		name, alias, err := runconfigopts.ParseLink(l)
		if err != nil {
			return err
		}
		child, err := daemon.GetContainer(name)
		if err != nil {
			//An error from daemon.GetContainer() means this name could not be found
			return fmt.Errorf("Could not get container for %s", name)
		}
		for child.HostConfig.NetworkMode.IsContainer() {
			parts := strings.SplitN(string(child.HostConfig.NetworkMode), ":", 2)
			child, err = daemon.GetContainer(parts[1])
			if err != nil {
				return fmt.Errorf("Could not get container for %s", parts[1])
			}
		}
		if child.HostConfig.NetworkMode.IsHost() {
			return runconfig.ErrConflictHostNetworkAndLinks
		}
		if err := daemon.registerLink(container, child, alias); err != nil {
			return err
		}
	}

	// After we load all the links into the daemon
	// set them to nil on the hostconfig
	hostConfig.Links = nil
	if err := container.WriteHostConfig(); err != nil {
		return err
	}

	return nil
}

func (daemon *Daemon) setHostConfig(container *container.Container, hostConfig *containertypes.HostConfig) error {
	// Do not lock while creating volumes since this could be calling out to external plugins
	// Don't want to block other actions, like `docker ps` because we're waiting on an external plugin
	if err := daemon.registerMountPoints(container, hostConfig); err != nil {
		return err
	}

	container.Lock()
	defer container.Unlock()

	// Register any links from the host config before starting the container
	if err := daemon.registerLinks(container, hostConfig); err != nil {
		return err
	}

	// make sure links is not nil
	// this ensures that on the next daemon restart we don't try to migrate from legacy sqlite links
	if hostConfig.Links == nil {
		hostConfig.Links = []string{}
	}

	container.HostConfig = hostConfig
	return container.ToDisk()
}