I’m working on a new project that has a Drupal site running in the cloud—specifically Amazon AWS with RightScale sitting on top to manage our servers and automated scaling scripts.
The advantage of RightScale is it allows us to manage our servers at a further abstracted layer than AWS itself — through the use of “RightScripts” we can script our way through the managing of low level resources.
Things started to get a bit hairy when our scripts needed to talk to Drupal, in particular, registering each new server as it comes online with our Drupal stack, thereby whitelisting its IP address as trustworthy.