Monitoring Node State (Enabled/Disabled)

A maximum of one HTTP-request every 30 seconds for monitoring per the vendor? That's a new one...

 

 

There are some problems with this. Assuming that the application will indeed fail if requests are made more frequently, what happens if people actually start using it? Secondly, generally a node is marked down if three subsequent requests fail, but in your case that would mean that it won't be marked down for at least 90 seconds once it has failed.

 

 

Given this limitation it would seem that the only way to monitor this app and not bring it down (per the specs from the vendor) is to use passive monitoring (i.e. use an iRule to ensure that the server response (based on a client request) is valid and mark down nodes via the iRule.