OSA upgrading Xenial Queens to Bionic Rocky

Hi all,

I was wondering if there was a guide for upgrading OpenStack Ansible  from Ubuntu 16.04 Queens to Ubuntu 18.04 Rocky? I remember a long time ago there was an etherpad set up for upgrading from 14.04 -> 16.04 but I can't seem to find anything similar for going to 18.04.

Annoyingly as we don't have lots of hardware, we are going to have to upgrade in place.

If there are any guides that would be much appreciated.

Many thanks.