But novaclient always provides key "device" that makes this key "required" de facto, see: https://github.com/openstack/python-novaclient/blob/f3fef4ab/novaclient/v2/volumes.py#L144
But novaclient always provides key "device" that makes this key "required" de facto, see: https:/ /github. com/openstack/ python- novaclient/ blob/f3fef4ab/ novaclient/ v2/volumes. py#L144