Hi,

I need to upgrade my Openstack deployment from Yoga (Rocky Linux 8) to Zed (Rocky Linux 9).
My deployment is an HCI deployment with ceph pacific deployed using ceph-ansible.
it contains :
- 03 controllers that contain also ceph mgr/mon/rgw/cephfs containers
- 27 compute/storage nodes

I am planning to follow these steps :
  1. Upgrade to Rocky 9, starting with the controllers, then the compute/storage nodes.
    1. Undeploy 1 controller at a time, upgrade to Rocky 9, re-deploy the controller.
    2. Undeploy 3 compute/storage nodes at a time, upgrade to Rocky 9, redeploy the nodes.
  2. Stop the Openstack platform
  3. Convert the deployed ceph pacific from ceph-ansible to cephadm.
  4. Upgrade from Yoga to ZED
If you can help me with some insights/thoughts things to do / to avoid, so that the upgrade will move smoothly, that would be great.

Regards.