The idea here is that the server can't be scaled up or down. I suggest googling "cattle vs pets". If you know how to make a single process scale horizontally across additional hosts or scale up in alternative datacenters with a chef service notification, I'd pay you money to tell me how.

So, um: devops and cloud architecture is my job. I think I know what "cattle vs pets" is referring to. Nothing in this thread has anything to do with one versus many processes or one versus many nodes, nor does it have anything to do with manual configuration of anything. Rewrite the configuration based in orchestration data or, in extremity, upload a new version of a cookbook that handles that new site; the hypothetical sixth site is added and the service kicked over without human interaction. Scaling is an orthogonal concern.