Such upgrades are not supported and you will most definitely run into issues and errors when attempting to upgrade various services. There is a way to do it only if you know exactly what you are doing and are ready to figure it out on your own. And it will involve some hackery and workarounds for sure. Main things to look out for: * if database migrations are still present and actually executed. As services were wiping out old migrations around Victoria/Wallaby, assuming everyone has the latest db schema anyway. * RPC versions compatibility * Python/OS/libvirt versions compatibility ср, 29 янв. 2025 г. в 14:11, engineer2024 <engineerlinux2024@gmail.com>:
Is there a way to upgrade openstack older versions like ussuri , victoria, by migrating just the nova, neutron dbs, schema to the latest version by skipping one level at once and then install the latest venvs against the latest migrated galera dbs. On the compute nodes, if we preserve just the var lib nova instances and on top of it reinstall the compute and neutron agents, will it work ?
I am asking becos, I don't know what r the dependencies among the major nova versions. Are the db schema and data, the only diffs from one version to another, or is there any thing else ?