Nginx has supported http loadbalancing basically forever using the upstream directive along with proxy_pass. It supports leastconn, round-robin, and ip-hash (st

Nginx has supported http loadbalancing basically forever using the upstream directive along with proxy_pass. It supports leastconn, round-robin, and ip-hash (sticky). It is far from unproven. I have personally used it successfully in some huge projects. This new announcement simply makes the existing functionality work with tcp backends.