We've committed to testing[*] on Ubuntu 18.04 LTS (Bionic Beaver) by the Stein release, but it's nearly upon us and we still have quite a few jobs, particularly Python 2.7 unit tests for most projects, running on older Ubuntu 16.04 LTS (Xenial Xerus) images instead. I propose that next Wednesday, March 13, we update the default node type in our Zuul job configurations from ubuntu-xenial to ubuntu-bionic for master branches of our projects. Note that most projects are already running Python 3.6 unit testing which happens on ubuntu-bionic images and DevStack/Tempest testing is already happening on ubuntu-bionic as well, so the switch for any job definitions not calling an explicit node type should be a non-event. Nevertheless, I wanted to start a brief discussion on the list as we are coming close to RC target week and it would be good to have the cut-over happen before then as some projects may not see any additional changes in Stein after their first RC tag. [*] https://governance.openstack.org/tc/reference/runtimes/stein.html -- Jeremy Stanley