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Reverse-proxying from a docker network (lemmy.dbzer0.com)

submitted 10 months ago* (last edited 10 months ago) by Scrath@lemmy.dbzer0.com to c/selfhosted@lemmy.world

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Hello, I have a question regarding the usage of a reverse-proxy which is part of a docker network.

I currently use Nginx Proxy Manager as a reverse-proxy for all my services hosted in docker. This works great since I can simply forward using each containers name. I have some services however (e.g. homeassistant) which are hosted separately in a VM or using docker on another device.

Is it possible to use the same reverse-proxy for those services as well? I haven't found a way to forward to hosts outside of the proxies docker network (except for using the host network setting which I would like to avoid)

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[–] AbouBenAdhem@lemmy.world 5 points 10 months ago (7 children)

If the other services are exposed on local ports, you can have NPM forward to those.

[–] Scrath@lemmy.dbzer0.com 2 points 10 months ago (6 children)

By exposed you basically mean that I can reach them using my browser? I can reach my homeassistant web ui on port 8123 but when I try to forward to that port with the servers IP I get a 400 Bad Request error. I'm not sure if this is caused by nginx being unable to forward or by homeassistant not accepting the connection somehow

[–] emuspawn@orbiting.observer 2 points 10 months ago* (last edited 10 months ago) (1 children)

If you have any kind of firewall on your network, you might make sure it's not blocking that port with a rule. Here's a couple screenshots from my setup in case that helps.

The config in NPM

The config in HA's configuration.yaml

Try adding just the NPM IP and HA IP first, then add the docker internal network as well if you still have issues.

[–] Scrath@lemmy.dbzer0.com 1 points 9 months ago

Thanks for the configuration example. Unfortunately it doesn't seem to work for me. I've replied to someone above with screenshots of what my configuration now looks like. The base_url option you use there wasn't available to me because it apparently has been deprecated and replaced with internal_url and external_url.

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