Mitigate Unplanned Scale Issues with an iRule Waiting Room

Looks great Jason. If it were me I would simplify deployment by putting it into an iApp and have a boilerplate page with specific link for an icon and a page theme based on either w3.css ( where the admin can specify the main colour theme ) or Bootstrap, again allowing themes.

Rather than using a table based on IP, a cookie on the client with a session ID would offload the task from the BIG-IP and reduce memory usage and speed up execution. Requests with a valid cookie should be preferred over non-cookie requests, to implement some kind of queueing.