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Are you reusing one postgres instance for all services? (jemmy.jeena.net)

submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]

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I have many services running on my server and about half of them use postgres. As long as I installed them manually I would always create a new database and reuse the same postgres instance for each service, which seems to me quite logical. The least amount of overhead, fast boot, etc.

But since I started to use docker, most of the docker-compose files come with their own instance of postgres. Until now I just let them do it and were running a couple of instances of postgres. But it's kind of getting rediciolous how many postgres instances I run on one server.

Do you guys run several dockerized instances of postgres or do you rewrite the docker compose files to give access to your one central postgres instance? And are there usually any problems with that like version incompatibilities, etc.?

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[–] [email protected] 1 points 7 months ago (1 children)

You're talking about a microservices architecture running in a kubernetes cluster? FFS.... 🙄

That's a ridiculous recommendation for a home-gamer. It's all up to how you want to manage dependencies, backups, performance, etc. If one is happy to have a single instance then there's nothing wrong with that. If one wants multiple instances for other reasons that's fine too. There are pros and cons to each approach. Your "I saw somebody recommend it on the internets" notwithstanding.

[–] [email protected] 2 points 7 months ago (1 children)

It's the one I'm using but it's not just running in a cluster. Even some applications recommend running separately like matrix. You can't run everything on the same.versiom all the time anyways.

[–] [email protected] 1 points 7 months ago

You can’t run everything on the same.versiom all the time anyways.

Unless you're doing something very specific with the database - yes you can. Most applications are fine with pretty generic SQL. For those that have specific requirements, well then give them their own instance. Or use that version for the ones that don't much care...