Hello,
    In my opinion, all rest api will get to manager of cinder volume.
If the manager is using DLM, we can say cinder volume can support
active-active. So, can we rewrite the comments and option's help in
page https://github.com/openstack/cinder/blob/master/cinder/cmd/volume.py#L78
    ?
Thanks a lot.
-- 
谦谦君子