I've got a pretty standard Rails application running with Unicorn and Nginx all on one box. I'd like to split off the application itself and have Nginx on one machine and Unicorn (with the Rails app) on another machine. The idea here being that I'd like to add another app server with Unicorn later in the future, mostly for some light load balancing.
I may be tackling this from the wrong angle. Is this normal/possible? If so, can someone point me to example configs or documentation?
If it's not the way to go, what's the proper route to achieve the end goal? I've looked into HAProxy, but after reading through some Nginx/Unicorn documentation, I get the idea that this can be achieved without any additional software.