Comment 2 for bug 1769196

Confirmed:

        return {
            "cinder": {
                "/etc/cinder/cinder.conf": {
                    "sections": {
                        service: [
                            ('volume_backend_name', service),
                            ('volume_driver', volume_driver),
                            ('rbd_pool', service),
                            ('rbd_user', service),
                            ('rbd_secret_uuid', leader_get('secret-uuid')),
                        ]
                    }
                }
            }
        }

rbd_user is set.