cinder/volume/local.yml

classes:
- service.cinder.volume.local
parameters:
  cinder:
    volume:
      enabled: True
      database:
        host: ${_param:single_address}
      glance:
        host: ${_param:single_address}
      message_queue:
        host: ${_param:single_address}
      identity:
        host: ${_param:single_address}
        region: ${_param:openstack_region}