Principles involved moving to multiple docker servers behind Traefik V2

[cjattard]

Hi Everyone.

Absolutely loving this repo and found the guides epically useful. I created a standalone server (linux, fronted by TraefikV2 with services running on docker-compose) - using the smarthomebeginner guide in 2020.

I'm now at the point where i want to move some services to a standalone server (Intel NUC) - similar to the setup of this repo, however i'm a bit suck at first principles. is someone able to help me with the following concepts:

1. Does Traefik V2 need to exist on both servers, or does it only need to exist on the primary server i.e where the router 21 & 443 forwarding is going to?
2. what principle steps are needed to spin up separate services as sub-domains (same primary domains) across both servers, is this simply a case of using the same docker network on the two separate compose files for each server?
3. are there any other concepts or guides that are useful in moving from a standalone Traefik v2, docker compose server to a multi server environment?

Thanks for all the hard work i'm really enjoying learning this all.