roles: - [mon.a, mon.c, mds.a, mds.b, mds.c, mds.d, osd.0, osd.1, osd.2] - [mon.b, mds.e, mds.f, mds.g, mds.h, mds.i, osd.3, osd.4, osd.5] - [client.0]