Using CDP as a reverse proxy for non-docker services - is it possible?

[AlexPewMaster]

Hi, I would like to use this as my reverse proxy. I have many Docker containers running on the same machine that's also running a reverse proxy, but I also have a tunnel for other services that run on a different machine. Is there a way that I can configure parts of CDP to proxy some things to localhost without a Docker container to attach the labels to?

[francislavoie]

Yes it's possible. You can either put labels right on your CDP container itself, or provide a base Caddyfile (see env config options).

It wouldn't be localhost though, because localhost means "connect to this same container". Containers are isolated from the host. You would connect to host.docker.internal instead (Google it for more details).

[ksurl]

you can use a placeholder container with labels to point to an external host ip. a lightweight option could be a busybox container with no networking and set to run tail -f /dev/null to stay running.