Deprec (http://www.deprec.org/ http://www.deprec.org/) takes you from a clean ubuntu install to a live rails site, and claims to support heartbeat/linux-ha and

Deprec (http://www.deprec.org/ http://www.deprec.org/) takes you from a clean ubuntu install to a live rails site, and claims to support heartbeat/linux-ha and multiple servers, as well as some misc handy stuff like ntp. (I've only used it to manage a simple single server.)