Hello,
I wanted to give everyone a heads up that we have been removing test jobs for older Linux distro releases in zuul-jobs. So far we've removed testing for OpenSUSE Leap 15.2, Debian Buster, and CentOS 7. We will be removing testing for Ubuntu Xenial in the near future as well.
Each of these distro releases is at or very near its end of life. Removing test jobs for these releases will make room for newer distro releases within the OpenDev Zuul deployment which will allow zuul-jobs to run tests against modern distro releases. These removals also mean that zuul-jobs cannot test for compatibility with those older releases. No intentional breakage is planned, but without testing to catch problems we may introduce incompatibilities over time.
Clark