I am looking for a proxy server with failover on string detection.
I have a 3rd web application that fails and displays an error message.
Since the server is "technically" up DNS failover doesn't work - nor can I find anything in Nginx, Squid, Pound, Delegate or Apache.
I need something that detects a string and then fails over.
My team and I have spent about 35 hours trying to get varnish polling to work and I am not going done that road again.
Anything else before I roll up my sleeves and roll my own?
NOTE - I have no control over root issue all I can do is wrap something around it to make it suck less.