On Wed, Dec 18, 2024 at 11:43 AM Jon Haddad <j...@rustyrazorblade.com> wrote:
> > We (Wikimedia) have had more (major) upgrades go wrong in some way, than > right. Any significant upgrade is going to be weeks —if not months— in the > making, with careful testing, a phased rollout, and a workable plan for > rollback. We'd never entertain doing more than one at a time, it's just > way too many moving parts. > > The question wasn't about why upgrades are hard, it was about why a > rolling restart of the cluster is hard. They're different things. > Yes, and Paul clarified that it wasn't (just) an issue of having to do rolling restarts, but the work involved in doing an upgrade. Were it only the case that the hardest part of doing an upgrade was the rolling restart... -- Eric Evans john.eric.ev...@gmail.com
