Self-hosting with Caddy and Docker

After re-building my VPS because things were a bit messy, I decided to move away from the rather complicated Traefik setup that I had before and move over to Caddy. This took a little while to get my head around, but ultimately is much simpler!

Docker compose

I'm running Caddy within a docker compose environment using a pretty basic setup in a docker-compose.yml file:

version: "3.7"

networks:
  default:
    name: caddy-proxy

volumes:
  caddy_data:
    external: true
  caddy_config

services:
  caddy:
    image: caddy:2.6.4
    container_name: caddy
    restart: unless-stopped
    ports:
      - "80:80"
      - "443:443"
      - "443:443/udp"
    volumes:
      - $PWD/caddy:/etc/caddy
      - $PWD/sites:/sites
      - caddy_data:/data
      - caddy_config:/config

Caddyfile

My Caddyfile sits in the caddy subdirectory and is really very simple:

{
	email: example@example.com
}

www.example.com {
	redir https://example.com{uri}
}

example.com {
	root * /sites/example.com
	file_server
}

Here I'm removing the www with a redirect, then I'm serving files from a directory under the mounted /sites directory which was mounted into the caddy container by docker. I can then just copy over my public folder from hugo to serve up this site. Caddy handles all the letsencrypt certificates and things without any messing about!

More services

With this setup it's pretty simple to add more services and use Caddy as proxy, for example FreshRSS:

Addition to the services section of docker-compose.yml:

  freshrss:
    image: freshrss/freshrss:latest
    container_name: freshrss
    restart: unless-stopped
    logging:
      options:
        max-size: 10m
    volumes:
      - $PWD/freshrss/data:/var/www/FreshRSS/data
      - $PWD/freshrss/extensions:/var/www/FreshRSS/extensions
    environment:
      - TZ=Europe/London
      - CRON_MIN='2,32'

and the Caddyfile addition:

freshrss.example.com {
	reverse_proxy freshrss:80
}

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