Dear all
Dear all
We are now running an OpenStack deployment: Yoga on CentOS8Stream.
We are now thinking about a possible migration to Ubuntu for several reasons in particular:
a- 5 years support for both the Operating System and OpenStack (considering LTS releases) b- Possibility do do a clean update between two Ubuntu LTS releases c- Easier procedure (also because of b) for fast forward updates (this is what we use to do)
Considering the latter item, my understanding is that an update from Ubuntu 20.04 Ussuri to Ubuntu 22.04 Yoga could be done in the following way (we have two controller nodes and n compute nodes):
- Update of first controller node from Ubuntu 20.04 Ussuri to Ubuntu 20.04 Victoria (update OpenStack packages + dbsync) - Update of first controller node from Ubuntu 20.04 Victoria to Ubuntu 20.04 Wallaby (update OpenStack packages + dbsync) - Update of first controller node from Ubuntu 20.04 Wallaby to Ubuntu 20.04 Xena (update OpenStack packages + dbsync) - Update of first controller node from Ubuntu 20.04 Xena to Ubuntu 20.04 Yoga (update OpenStack packages + dbsync) - Update of first controller node from Ubuntu 20.04 Yoga to Ubuntu 22.04 Yoga (update Ubuntu packages) - Update of second controller node from Ubuntu 20.04 Ussuri to Ubuntu 22.04 Yoga (update OpenStack and Ubuntu packages) - Update of the compute nodes from Ubuntu 20.04 Ussuri to Ubuntu 22.04 Yoga (update OpenStack and Ubuntu packages)
We would do the same when migrating from Ubuntu 22.04 Yoga to Ubuntu 24.04 and the OpenStack xyz release (where xyz is the LTS release used in Ubuntu 24.04)
Is this supposed to work or am I missing something ?
If we decide to migrate to Ubuntu, the first step would be the reinstallation with Ubuntu 22.04/Yoga of each node currently running CentOS8 stream/Yoga. I suppose there are no problems having in the same OpenStack installation nodes running the same Openstack version but different operating systems, or am I wrong ?
Thanks, Massimo