Example doesn't take all parameters into account and needs to be improved. Duplicate of: https://bugzilla.redhat.com/show_bug.cgi?id=1654407 https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/fast_forward_upgrades/assembly-preparing_for_overcloud_upgrade#annotations:474bd058-e402-467d-9407-d31318f4becc