Very simple docker image that builds Caddy with the Cloudflare DNS plugin so Caddy can handle Cloudflare DNS-01 challenges. I run multiple instances of Caddy across several servers, and I figured having to rebuild it locally on every update was silly. So I put it in the GitHub Container Registry.
Just set an environment variable containing a Cloudflare API token with Zone.Zone and Zone.DNS permissions for your domain. Here is an example docker-compose with the values that would be different from an ordinary caddy setup:
services:
caddy:
image: ghcr.io/emberquill/caddy:latest
environment:
CLOUDFLARE_API_TOKEN: <CLOUDFLARE API TOKEN>
(Truncated)Then in your Caddyfile, add tls blocks to whichever domains need them as shown in the example in the Cloudflare plugin repo, using the environment variable you previously configured:
your.domain.name:443 {
reverse_proxy some_container:80
tls {
dns cloudflare {env.CLOUDFLARE_API_TOKEN}
}
}