change pool based on external control
I'm not sure how to start this one... here's what I want to do
I want a rule to run and look for something, so that when it exsists will change the pool (or pool members) for a vip.
Background: We have a group of Oracle people who periodically send updates for web servers and databases, they have to go up during a midnight-4am time frame. The web servers updates are prepped ahead of time on a second node and are kept in a separate pool until needed. I am looking for a way to allow them to do something external (like create a file) and have it switch pools so the new updated server is the only one accepting traffic.
I looked at if file exsists syntax in TCL, but I don't think iRules can use the 'file' keyword.