We’ve upgraded lemmy.world to 0.18.1-rc.1 and rolled back that upgrade because of issues.
(If you had posted anything in those 10 minutes between upgrade and rollback, that post is gone. Sorry!)
The main issue we saw is that users can’t login anymore. Existing sessions still worked, but new logins failed (from macos, ios and android. From linux and windows it worked)
Also new account creation didn’t work.
I’ll create an issue for the devs and retry once it’s fixed.
Edit Contacted the devs, they tell me to try again with lemmy-ui at version 0.18.0. Will try again, brace for some downtime!
Edit 2 So we upgraded again, and it seemed to work nicely! But then it slowed down so much it was unuseable. There were many locks in the database. People reported many JSON errors. Sorry, we won’t be on 0.18.1 any time soon I’m afraid…
If I understand correctly this isn’t a scaling problem as much as it is a compatibility problem that led to other downstream effects after it was remediated.
That’s fair, I’m kind of conflating scale out with HA. When you have a cluster, you can typically upgrade part without bringing down the whole instance, but it may just not be mature enough for that yet.