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Reverse Proxy: a single point of failure in my lab (lemmy.dbzer0.com)

submitted 7 months ago* (last edited 7 months ago) by thisisnotausername@lemmy.dbzer0.com to c/selfhosted@lemmy.world

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So, just for the sake of it I've been trying to get my lab to be HA -or as HA as a small homelab can be-

My current set up is a follows:

3 proxmox servers with some Debian VMs, the VMs run docker swarm

A NAS, with Truenas

ISProuter -> OpenWRTRouter -> VM [Port fowards 80/443]

This works like a charm when I am in my LAN, but when I access from outside, if the VM that has 80/443 port forwarded to is down (which it never is) I'd loose connectivity.

I have now idea how to solve this little problem in a efficient way, maybe a reverse proxy running on my OpenWRT? (Which'd only move the point of failure to my router, but if my router goes down is gameover already anyways) has anyone attempted this?

Any opinions/ideas?

Update:

Solved! I moved my traefik data to a NFS share in my NAS, replicated the container across all manager nodes and then installed keepalived and now float a VIP between them.

Works like a charm and it was super easy to set up, literally 3 ansible tasks and 1 jinja template and you are done.

Thanks to all of ya!

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[–] thisisnotausername@lemmy.dbzer0.com 4 points 7 months ago* (last edited 7 months ago) (1 children)

The more I go into this rabbit hole, the more I understand this, and I understand now that I went into the hole with practically 0 knowledge of this topic. It was so frustrating to get my "HA" proxy on LAN with replicated containers, DNS and shared storage, hours sank into getting permission to work, just to realise "oh god, this only works on LAN" when my certs failed to renew.

I do not think I need this, truth is that the lab is in a state where I have most things I want[need] working very well and this is a fun nice to have to learn some new things.

Thanks for the info! I will look into it!

[–] Dempf@lemmy.zip 1 points 7 months ago

IIRC there's a couple different ways with Caddy to replicate the letsencrypt config between instances, but I never quite got that working. I didn't find a ton of value in a HA reverse proxy config anyways since almost all of my services are running on the same machine, and usually the proxy is offline because that machine is offline. The more important thing was HA DNS, and I got that working pretty well with keepalived. The redundant DNS server just runs on a $100 mini PC. Works well enough for me.