docker-postgres-upgrade VS MySQL

Ah, looks like psql seems to have switched to actually using minor and major versions properly during the last two years - I remember the dance from the 9.x versions and postgres-upgrade [1].

In any case it's way more straightforward with mysql.

[1] https://hub.docker.com/r/tianon/postgres-upgrade

Related: https://github.com/tianon/docker-postgres-upgrade

Also don't forget to pg_dump before the upgrade, as the binaries for previous Postgres version might not exist anymore after the upgrade... Otherwise, https://hub.docker.com/r/tianon/postgres-upgrade/ might be helpful (haven't used it though).

> When you say "complex ride" what does that mean?

On managed postgresql services like RDS it's easy, yes, because Amazon does all of the nasty work for you and has already seen all the kinks you may run into.

If you are on your own and using Docker, you essentially need a third-party image that has the old and new binaries (https://github.com/tianon/docker-postgres-upgrade).

If you are on your own and are using distribution packages, it's more complicated (https://blog.samuel.domains/blog/tutorials/from-stretch-to-b...).

If you are on your own and use postgres from source, well... have fun, there's a reason why I prefer using distribution-maintained packages when possible.

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