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this post was submitted on 20 Oct 2024
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Yes, that's what Gluetun is for. You create a Gluetun container and specify which containers should use it as the gateway in the compose file with:
network_mode: "service:gluetun"
Then you can open a shell in the container and run this to see if the container's IP is different from your own:
curl ifconfig.io
Make sure to try stopping the gluetun container and confirm your other containers lose network access.
There are plenty of guides about this if you search for "gluetun arr stack", like this random one I picked: https://www.smarthomebeginner.com/gluetun-docker-guide/
That has some steps outlining the basic gluetun configuration, how to put specific containers behind it, and test it.
Gluetun is for containers. OP is asking about routing.
It also exposes a proxy (and a tun), most things you want behind a vpn can use a proxy.
I'm pretty sure OP is asking about forcing containers to use the VPN through gluetun.
"If I set up qBittorrent and the Arrs as Docker containers, can I use Gluetun to bind just them to the VPN?"
I think they are just misunderstanding what Gluetun is for.
Apologies for the slow reply :)
To clarify, I'm happy with using either, if my network traffic is split. Ideally I want to switch a lot of my programs to containers at some point, then switch to a better server OS. In the meantime though, I just want to get everything working together.
Qbittorrent has to be behind the VPN, and that's stopping my Minecraft servers from connecting to the outside world. If there's a way to force Qbittorrent to be behind the VPN while leaving a non VPN connection open, I'm happy to use it. I only mentioned Gluetun because I've heard of it, and I know that it's for keeping containers behind a VPN. I thought it might be the answer here :)