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Struggling to Get Started Hosting a Mix of Local and Publicly Exposed Containers (programming.dev)

submitted 1 year ago by [email protected] to c/selfhosted

17 comments fedilink hide all child comments

I'm new to self hosting and just starting to experiment with web development. I've been reading and cross-referencing several guides, but I'm having trouble figuring out how to put together all the pieces to achieve what I'm looking for. Maybe the perfect tutorial is out there, but I just haven't found the right search terms.

On my Raspberry Pi 4, I have a few Docker containers already up and running:

Pi Hole with network-mode set to host so it can handle DHCP too
Watchtower to keep the Pi Hole up-to-date
Portainer to check on the status of things

In addition those, I'm planning to host a personal website, a small Matrix server, and a few other things eventually. For portability reasons and my own professional development, I want to go all-in on Docker Compose and keep each piece in its own separate container.

The main thing I'm struggling with is figuring out how to configure nginx-proxy-manager and my Docker networks to expose only the containers I want to expose while keeping my other containers safe. More specifically, how do I handle the conflicting ports between Pi Hole and nginx-proxy-manager without exposing my Pi Hole's admin page to the public internet? Can I use the same reverse proxy to manage all my local and public services at the same time?

Another piece that I'm feeling unsure about is pointing my domain name to the right IP address and setting up SSL encryption. It feels like there are a lot of ways to mess it up. What do I need to do to keep things safe and secure? How important is something like Cloudflare tunnel?

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[–] manwichmakesameal 7 points 1 year ago (1 children)

Why did you register two separate domains instead of using a wildcard cert from LE and just using subdomains?

[–] redemon 2 points 1 year ago (2 children)

To separate my internal and external. Both my domains have wild card certs. I have a VPS that connects to my home lab. External requests hit the VPS first. Internal requests bypass the VPS and go straight to my home lab.

I could use a single domain but then my internal requests would reach out to the VPS just to go back to my home lab. I wanted to avoid that extra hop.

[–] manwichmakesameal 1 points 1 year ago (1 children)

Forgive my stupidity, but couldn't you just use split-horizon DNS and have your internal DNS resolve to your homelab instead of the VPS? Personally, that's what I've done. So external lookups for sub.domain.tld go one way and internal lookups go to 10.10.10.x.

[–] redemon 1 points 1 year ago

Yes, I could do a split DNS and achieve the same thing. I didn't really want to change my DNS settings in my router. I also just like the separation by domain name.

[–] grue 1 points 1 year ago (1 children)

Do you need to actually register two different domains for that, or could the internal one use a reserved TLD like .lan or .internal?

[–] redemon 1 points 1 year ago

I actually registered two different domains. I think using .lan or .internal would work like that. Essentially from the client machine, it needs to be able to resolve the domain name to the IP of your internal service. So say from your home PC you want to have grue.com resolve to your server. One way to do that is have a host entry on your PC to point grue.com to your server IP address. That way is easy to do and works great but will get annoying if you have multiple client machines.

Another way is if you have a local DNS server that can add locally defined DNS records. Pi-hole can do this, so that way any client machine that goes through Pi-hole will be routed to your server IP.