Hi,

In OpenStack Stein release notes https://docs.openstack.org/releasenotes/cinder/stein.html (https://docs.openstack.org/releasenot...), there is statement: RBD driver has added multiattach support. It should be noted that replication and multiattach are mutually exclusive, so a single RBD volume can only be configured to support one of these features at a time. Additionally, RBD image features are not preserved which prevents a volume being retyped from multiattach to another type. This limitation is temporary and will be addressed soon.

But in Cinder Driver Matrix https://docs.openstack.org/cinder/latest/reference/support-matrix.html#driver-support-matrix (https://docs.openstack.org/cinder/lat...), RBD(Ceph) is still marked as multi attach not supported.

Which one is right? Does RBD driver support multiattach now?

Thanks.