I have just finished a switch from oVirt 4.3 to oVirt 4.5 and CentOS 7 to Rocky 9.
The main gotcha is that the latest oVirt official release is broken, you should use the
nightly build.
I did it without downtime, but choose to reinstall the engine on a brand new server and
restored the database.
For each host, I put each of them in maintenance mode, reinstalled the OS on it and then
reinstalled it in oVirt.
Le 20 nov. 2024 à 18:08, dadamysus--- via Users
<users(a)ovirt.org> a écrit :
I have inherited the admin duty to maintain a a small oVirt cluster featuring 2 nodes
running oVirt 4.5.4 based on the CentOS Stream (using the official Node ISOs) running on
physical machines, including a hosted engine. Sadly, the documentation is a bit on the
"light side" and the official oVirt documentation can be overwhelming at times.
As CentOS Stream 8 is no longer supported we would like to migrate the nodes to either
CentOS Stream 9 using the NG node ISOs or to Rocky Linux 9 - but I guess using the
official ISOs seems like the smoothest path. Still, I would like to know what the general
steps are to migrate without setting up a entirely fresh cluster.
Is it possible to migrate by setting up an CentOS Stream 9 node in the existing cluster
and to deploy a new engine from there?
Is it possible to migrate VMs without downtime in this process?
Ideally, does anyone have some kind of step-by-step guide to get from CentOS Stream 8 to
9 using the oVirt Node ISOs?
Or is it possible to upgrade the existing nodes to CentOS Stream 9 and deploy a new
hosted engine from there without creating an entirely new node?
And yeah, I have already searched this list for answers
(
https://lists.ovirt.org/archives/list/users@ovirt.org/thread/BE5BS4MJSJ4F...)
but that thread lacks some the mentioned details.
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