I have no idea what moving parts need to be adjusted in teuthology (if any) but we have CentOS 8 Stream FOG images for smithi and gibba machine types. I tried to make it simple to adapt to by just using 'stream' as the minor version number. teuthology-lock --lock-many 1 -m smithi --os-type centos --os-version 8.stream Still working on CentOS 9. Let me know if you run into any issues. -- David Galloway Senior Systems Administrator Ceph Engineering