roles:
- [mon.a, mgr.y, mds.a, osd.0, osd.1, osd.2, osd.3, client.0]
- [mon.b, mon.c, mgr.x, mds.a-s, osd.4, osd.5, osd.6, osd.7]
openstack:
- volumes: # attached to each instance
count: 4
size: 30 # GB
log-rotate:
ceph-mds: 10G
ceph-osd: 10G