caddy-ssh VS caddy-docker-proxy

See the article linked in OP for example, Caddy at its core is actually just config management and runtime platform where just about any kind of app can be built on top. It just happens to ship with state of the art HTTP and TLS apps. Third party plugins can add even more, like https://github.com/mohammed90/caddy-ssh which is a fully featured SSH server. And this can all run from a single binary, using Go's concurrency model.

The plans are there! I focused on implementing the absolute necessary parts of every layer before taking round-2 for the more in-depth implementation. I actually have both the linked thread and the article saved aside to study when I'm ready to implement certificate-based authentication. Knowing Gitea already has it implemented, I had plans to study their implementation to know what I'm venturing into. If anybody else is interested in picking it up, please feel free to tackle it! I'd love to see that PR.

I've created tracking issue: https://github.com/mohammed90/caddy-ssh/issues/10

Sticky sessions are supported: https://caddyserver.com/docs/caddyfile/directives/reverse_pr..., and yes it's pluggable so you could write your own LB policy. Very easy, just copy the code from Caddy's source to write your own plugin. Let us know if you need help.

Also yes, Caddy does service discovery if you use https://github.com/lucaslorentz/caddy-docker-proxy, configuration via Docker labels. Or you can use dynamic upstreams (built-in) https://caddyserver.com/docs/caddyfile/directives/reverse_pr... to use A/AAAA or SRV DNS records to load your list of upstreams.

Caddy via Caddy Docker Proxy (network).

https://github.com/lucaslorentz/caddy-docker-proxy

It handles the routing to multiple dockerized projects on one server, by scanning docker compose files for labels and automatically setting up the required caddy configuration.

My go to is always this instead:

https://github.com/lucaslorentz/caddy-docker-proxy

Single label to a docker container and with correct DNS you’ll have an automatically managed certificate right away.

I have had a great experience with using this: https://github.com/lucaslorentz/caddy-docker-proxy

It combines caddy with docker-compose labels, making it super easy to spin up new projects that can immediately be exposed.

If you want a slightly heavier but more robust solution, caddy-docker-proxy[0] is a plugin that listens to the Docker socket and automatically updates the Caddy configuration based on Docker labels you add to containers.

I.e. it makes Caddy act a bit more like Traefik. Most of the time, you'll just add the label `caddy.reverse_proxy={{upstreams http 8080}}` to your containers and the plugin will regenerate Caddy's configuration whenever the container is modified.

[0] https://github.com/lucaslorentz/caddy-docker-proxy

I disagree, Caddy works great in Docker. See https://caddyserver.com/docs/running#docker-compose, and CDP is a project that autoconfigures Caddy from labels https://github.com/lucaslorentz/caddy-docker-proxy. Regarding plugins, it's super simple to write a Dockerfile to add plugins, we ship a builder image variant that can be used to compile in any plugins you want.

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This way, Caddy will buffer the request and give 30 seconds for your new service to get online when you're deploying a new version.

Ideally, during deployment of a new version the new version should go live and healthy before caddy starts using it (and kills the old container). I've looked at https://github.com/Wowu/docker-rollout and https://github.com/lucaslorentz/caddy-docker-proxy but haven't had time to prioritize it yet.

Docker labels support is available via a plugin https://github.com/lucaslorentz/caddy-docker-proxy