<div xmlns="http://www.w3.org/1999/xhtml">Hi Gilles,</div><div xmlns="http://www.w3.org/1999/xhtml"> </div><div xmlns="http://www.w3.org/1999/xhtml">Regarding Xenial - Bionic upgrade - it's a possible upgrade, but it looks like more one-by-one re-setup than upgrade, if you wish to upgrade not only host OS, but containers as well. First of all you'll need to complete Q->R upgrade, after that you'll be able to upgrade Ubuntu.  For instance I've completed such upgrade for my deployments, and it was pretty successful. We've got some notes regarding such upgrade on etherpad: <a href="https://etherpad.openstack.org/p/osa-rocky-bionic-upgrade">https://etherpad.openstack.org/p/osa-rocky-bionic-upgrade</a></div><div xmlns="http://www.w3.org/1999/xhtml"> </div><div xmlns="http://www.w3.org/1999/xhtml">Mixed deployments are supported by OSA as well - you may easily use different operating systems in one deployment, you just need wheels and packages to be build on the repo-server for this OS.</div><div xmlns="http://www.w3.org/1999/xhtml">As far as I know work on upgrade Rocky->Stein is still in progress.</div><div xmlns="http://www.w3.org/1999/xhtml"> </div><div xmlns="http://www.w3.org/1999/xhtml">13.04.2019, 12:21, "Gilles Mocellin" <gilles.mocellin@nuagelibre.org>:</div><div xmlns="http://www.w3.org/1999/xhtml">> Hello,</div><div xmlns="http://www.w3.org/1999/xhtml">></div><div xmlns="http://www.w3.org/1999/xhtml">> I'm actually using OpenStack-Ansible to deploy a little public cloud. For now</div><div xmlns="http://www.w3.org/1999/xhtml">> it runs on Queens / Ubuntu 16.04.</div><div xmlns="http://www.w3.org/1999/xhtml">></div><div xmlns="http://www.w3.org/1999/xhtml">> I've read that Rocky will be the only release supported on both Ubuntu 16.04</div><div xmlns="http://www.w3.org/1999/xhtml">> and Ubuntu 18.04 with OpenStack-Ansible.</div><div xmlns="http://www.w3.org/1999/xhtml">> Stein being out soon (with OpenStack-Ansible), the question of Host OS upgrade</div><div xmlns="http://www.w3.org/1999/xhtml">> from Ubuntu 16.04 to ubuntu 18.04 is a big thing of this year.</div><div xmlns="http://www.w3.org/1999/xhtml">></div><div xmlns="http://www.w3.org/1999/xhtml">> I've not found any documentation about that upgrade path (Rocky->Stein, host</div><div xmlns="http://www.w3.org/1999/xhtml">> OS).</div><div xmlns="http://www.w3.org/1999/xhtml">> I had some answers on IRC that OpenStack Ansible does not support a mixed</div><div xmlns="http://www.w3.org/1999/xhtml">> environnement (adding compute nodes on Ubuntu 18.04 while the rest is on</div><div xmlns="http://www.w3.org/1999/xhtml">> Ubuntu 16.04 for example).</div><div xmlns="http://www.w3.org/1999/xhtml">></div><div xmlns="http://www.w3.org/1999/xhtml">> Did I miss something in the actual doc or in some blogs ?</div><div xmlns="http://www.w3.org/1999/xhtml">></div><div xmlns="http://www.w3.org/1999/xhtml">> I'm sure some users already faced this with transition fro Ubuntu 14.04 to</div><div xmlns="http://www.w3.org/1999/xhtml">> Ubuntu 16.04. There's certainly some material to start some documentation and</div><div xmlns="http://www.w3.org/1999/xhtml">> add it to https://docs.openstack.org/openstack-ansible/stein/admin/upgrades/</div><div xmlns="http://www.w3.org/1999/xhtml">> major-upgrades.html.</div><div xmlns="http://www.w3.org/1999/xhtml">></div><div xmlns="http://www.w3.org/1999/xhtml">> I know that there's less contributors now, I'll see if I can help.</div><div xmlns="http://www.w3.org/1999/xhtml">></div><div xmlns="http://www.w3.org/1999/xhtml">> Thanks.</div><div xmlns="http://www.w3.org/1999/xhtml"> </div><div xmlns="http://www.w3.org/1999/xhtml">-- </div><div xmlns="http://www.w3.org/1999/xhtml">Kind Regards,</div><div xmlns="http://www.w3.org/1999/xhtml">Dmitriy Rabotyagov</div><div xmlns="http://www.w3.org/1999/xhtml"> </div>