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Route domain name to Docker containers on Synology NAS? (lemmy.world)

submitted 1 year ago by schmurnan@lemmy.world to c/selfhosted@lemmy.world

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I'm sure I'm massively overthinking this, but any help would be greatly appreciated.

I have a domain name that I bought through NameCheap and I've pointed it to Cloudflare (i.e. updated the name servers). I have a Synology NAS on which I run Docker and a few containers. Up until now I've done this using IP addresses and ports to access everything (I have a Homepage container running and just link to everything from there).

But I want to setup SSL and start running Vaultwarden, hence purchasing a domain name to make it all easier.

I tried creating an A record in Cloudflare to point to the internal IP of my NAS (and obviously, this couldn't be orange-clouded through CF because it's internal to my LAN). I'm very reluctant to point the A record to the external IP of my NAS (which, for added headache is dynamic, so I'd need to get some kind of DDNS) because I don't want to expose everything on my NAS to the Internet. In actual fact, I'm not precious about accessing any of this stuff over the internet - if I need remote access I have a Tailscale container running that I can connect to (more on that later in the post). The domain name was purely for ease of setting up SSL and Vaultwarden.

So I guess my questions are:

What is the best way to go about this - do I create a DDNS on the NAS and point that external IP address to my domain in Cloudflare, then use Traefik to just expose the containers I want to have access to using subdomains?
If so, then how do I know that all other ports aren't accessible (I assume because I'm only going to expose ports 80 and 443 in Traefik?)
What do other people see (i.e. outside my network) if they go to my domain? How do I ensure they can't access my NAS and see some kind of page?
Is there a benefit to using Cloudflare?
How would Pi-hole and local DNS fit into this? I guess I could point my router at Pi-hole for DNS and create my A records on Pi-hole for all my subdomains - but what do I need to setup initially in Cloudflare?
I also have a RPi that has a (very basic) website on it - how do I setup an A record to have Cloudflare point a sub-domain to the Pi's IP address?
Going back to the Tailscale thing - is it possible to point the domain to the IP address of the Tailscale container, so that the domain is only accessible when I switch on the Tailscale VPN? Is this a good idea/bad idea? Is there a better way to do it?

I'm sure these are all noob-type questions, but for the past 6-7 years I've purely used this internally using IP:port combinations, so never had to worry about domain names and external exposure, etc.

Many thanks in advance!

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[–] schmurnan@lemmy.world 1 points 1 year ago

Thanks, and yeah sorry, what I meant was to listen on both ports 80 and 443 and have a redirect in Traefik from 80 to 443 - I don't plan on having anything directly accessible over port 80.

As per another post, I've hit a stumbling block:

OK so made a start with this. Spun up a Pi-hole container, added mydomain.com as an A record in Local DNS, and created a CNAME for traefik.mydomain.com to point to mydomain.com.

In Cloudflare, I removed the mydomain.com A record and the www CNAME record.

Doing an nslookup on mydomain.com I get

Non-authoritative answer:
*** Can't find mydomain.com: No answer

Which I guess is to be expected.

However, when I then navigate to http://traefik.mydomain.com in my browser, I’m met with a Cloudflare error page: https://imgur.com/XhKOywo.

Below is the docker-compose of my traefik container:

traefik:
    container_name: traefik
    image: traefik:latest
    restart: unless-stopped
    networks:
      - medianet
    ports:
      - 80:80
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - /volume1/docker/traefik:/etc/traefik
      - /volume1/docker/traefik/access.log:/logs/access.log
      - /volume1/docker/traefik/traefik.log:/logs/traefik.log
      - /volume1/docker/traefik/acme/acme.json:/acme.json
    environment:
      - TZ=Europe/London
    labels:
      - traefik.enable=true
      - traefik.http.routers.traefik.rule=Host(`$TRAEFIK_DASHBOARD_HOST`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`))
      - traefik.http.routers.traefik.service=api@internal

My traefik.yml is also nice and basic at this point:

global:
  sendAnonymousUsage: false

entryPoints:
  web:
    address: ":80"

api:
  dashboard: true
  insecure: true

providers:
  docker:
    endpoint: "unix:///var/run/docker.sock"
    watch: true
    exposedByDefault: false

log:
  filePath: traefik.log
  level: DEBUG

accessLog:
  filePath: access.log
  bufferingSize: 100

Any ideas what’s going wrong? I’m unclear on why the domain is still routing to Cloudflare.