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[docker compose help] Is it possible to map ports when using network_mode? (lemmy.kde.social)

submitted 1 day ago by tubbadu@lemmy.kde.social to c/selfhosted@lemmy.world

9 comments fedilink hide all child comments

Hello everybody! I have the following issue: I have two countainers, let's call them C1 and C2, and they both expose the same port, let's say 1234. I want to route both of them through a gluetun container. to do this, I added

network_mode: container:gluetun

at each container. But they both expose the same port, so there's a conflict. Without routing them though gluetun I can just

ports:
  - 1235:1234

but using network_mode this cannot be done. What can I do? The only thing that comes to my mind is to use two gluetun containers, but I'd rather use a single one

thanks in advance!

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[–] MangoPenguin@lemmy.blahaj.zone 3 points 1 day ago (2 children)

You can just change the port directly on the application for one of them.

[–] tubbadu@lemmy.kde.social 1 points 18 hours ago (1 children)

thanks for the reply! many services allows this by setting an environmental variable or through a config file, but sadly not all of them

[–] MangoPenguin@lemmy.blahaj.zone 1 points 17 hours ago

I've yet to come across one that doesn't allow it, that's a pretty important feature for anything listening on a port to have.

[–] alwayssitting@infosec.pub 1 points 22 hours ago

Yeah that would be the best way to solve this problem.