code: func (daemon *Daemon) ActivateContainerServiceBinding(containerName string) error {
  	container, err := daemon.GetContainer(containerName)
  	if err != nil {
  		return err
  	}
  	sb := daemon.getNetworkSandbox(container)
  	if sb == nil {
  		return fmt.Errorf("network sandbox does not exist for container %s", containerName)
  	}
  	return sb.EnableService()
  }
docs: // ActivateContainerServiceBinding puts this container into load balancer active rotation and DNS response