--- /dev/null
+roles:
+- [mon.a, mgr.x, mds.a, mds.d, osd.0, osd.3, osd.6, osd.9, client.0]
+- [mon.b, mgr.y, mds.b, mds.e, osd.1, osd.4, osd.7, osd.10]
+- [mon.c, mgr.z, mds.c, mds.f, osd.2, osd.5, osd.8, osd.11]
+openstack:
+- volumes: # attached to each instance
+ count: 4
+ size: 20 # GB
+- machine:
+ disk: 200 # GB