roles: - [mon.a, mgr.x, osd.0, mds.a, mds.b, client.1, client.2, client.3] - [client.0, osd.1, osd.2] openstack: - volumes: # attached to each instance count: 2 size: 10 # GB log-rotate: ceph-mds: 10G ceph-osd: 10G