Trouble with latest update

[alehandrof (Alex Armstrong)]

I’m having trouble with the latest update. Now my Discourse site is down and will not get up

After updating via the admin I was prompted to rebuild the app via the commandline. I did ./launcher rebuild app and it finished successfully. I.e., I got to this:

To complete the upgrade, rebuild again using:

./launcher rebuild app

I dutifully did so, but ended up with the same message. I tried it a couple more times, before I decided that something was definitely up.

The site was down at this point so I tried to bring it back up with ./launcher start app.

The site will not come up and I’m getting a “502 Bad Gateway” message.

Any suggestions?

(Edited for clarity.)

[osioke (Osioke Oarue-Itseuwa)]

Try going through this topic to see if you’ll find something similar to your case:

PostgreSQL 12 update

WARNING! If your database is very large, you will need a lot of extra disk space (2x database size) and should be very careful with this upgrade! We just landed the long waited PostgreSQL major version upgrade. Any site admins rebuilding Discourse from the command line will be upgraded to PostgreSQL 12 from the old PostgreSQL 10. We are running this new version for a while on Meta, and everything is working fine. PostgreSQL 12 brings lots of improvements that will be automatical…

[alehandrof (Alex Armstrong)]

I had looked through that thread @osioke but had been afraid to tinker further, without getting a clearer picture of what’s going on.

I was able to bring my site back by reverting "templates/postgres.template.yml" to "templates/postgres.10.template.yml" in app.yml.

It wasn’t clear from the instructions there that this could be used after running the update – only that it could be used to postpone it.