roles: - [mon.a, osd.0, osd.1, osd.2, osd.3, mds.a, mds.c, client.2] - [mgr.x, osd.4, osd.5, osd.6, osd.7, mds.b, mds.d, client.3] - [client.0] - [client.1] openstack: - volumes: # attached to each instance count: 2 size: 10 # GB log-rotate: ceph-mds: 10G ceph-osd: 10G