Description of problem:
OSP10 -> OSP13 FFU upgrade: upgrade_steps_playbook.yaml: pre upgrade validations are placed at the end of the controller upgrade playbook.
I am not sure that in case of FFU we need those validations as the services shouldn't be running at this point. Attaching the controller upgrade playbook where you can see the validations are placed at the end of the playbook: http://paste.openstack.org/show/646509/
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHEA-2018:2086