roles:
- - mon.a
  - mon.c
  - mgr.y
  - osd.0
  - osd.1
  - osd.2
  - osd.3
  - client.0
  - node-exporter.a
  - alertmanager.a
- - mon.b
  - mgr.x
  - osd.4
  - osd.5
  - osd.6
  - osd.7
  - client.1
  - prometheus.a
  - grafana.a
  - node-exporter.b
openstack:
- volumes: # attached to each instance
    count: 4
    size: 10 # GB
overrides:
  ceph:
    create_rbd_pool: true
    conf:
      osd:
        osd shutdown pgref assert: true