Sticky sessions are supported: https://caddyserver.com/docs/caddyfile/directives/reverse_proxy#load-balancing https://caddyserver.com/docs/caddyfile/directives/

Sticky sessions are supported: https://caddyserver.com/docs/caddyfile/directives/reverse_proxy#load-balancing 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 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_proxy#dynamic-upstreams https://caddyserver.com/docs/caddyfile/directives/reverse_pr... to use A/AAAA or SRV DNS records to load your list of upstreams.