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.