如何使用docker-machine和openstack附加卷

Question

我能够使用docker-machine和openstack，并使用docker-machine create -d openstack <remaining arguments>创建一个实例，但是我想知道如何将卷附加到实例上。

如果看到帮助，我看不到附加卷的任何选择，

Commands:
  active                Print which machine is active
  config                Print the connection config for machine
  create                Create a machine
  env                   Display the commands to set up the environment for the Docker client
  inspect               Inspect information about a machine
  ip                    Get the IP address of a machine
  kill                  Kill a machine
  ls                    List machines
  provision             Re-provision existing machines
  regenerate-certs      Regenerate TLS Certificates for a machine
  restart               Restart a machine
  rm                    Remove a machine
  ssh                   Log into or run a command on a machine with SSH.
  scp                   Copy files between machines
  mount                 Mount or unmount a directory from a machine with SSHFS.
  start                 Start a machine
  status                Get the status of a machine
  stop                  Stop a machine
  upgrade               Upgrade a machine to the latest version of Docker
  url                   Get the URL of a machine
  version               Show the Docker Machine version or a machine docker version
  help                  Shows a list of commands or help for one command