CI pool uses different flavors of Linux and FreeBSD distributions which are used as a base for all the tests run against submitted patches. Below is the listing which covers all currently supported versions and the related CI jobs (see status as a reference).
Trying to follow new release as per the release cycle whenever possible.
Jobs listed below are run on bare-metal systems where version of Fedora may vary. In the future these will be aligned with the vg jobs.
Last two LTS releases. Currently 20.04 and 22.04.
Maintained releases. Currently 7.9.
Last release. Currently 8.6. CentOS 8 replacement.
Production release. Currently 12.2