roles:
- [mon.a, mgr.x, osd.0, osd.1, client.0]
openstack:
- volumes: # attached to each instance
    count: 2
    size: 10 # GB
tasks:
- install:
- ceph:
    fs: xfs
    conf:
      global:
        journal aio: true
- filestore_idempotent: