Forum Discussion
lucaspawpaw_559
Nimbostratus
NimbostratusBalance to webserver port based on value held in status file
Hi all,
First time poster, and recently getting into load balancing. I'm perfectly fine with setting up virtual servers to do the basic tasks, but I'm getting stuck on iRules. Is th...
The_BhattmanNimbostratus
NimbostratusHi lucaspawpaw,
iRule cannot directly read the value of a text file. However, you can read a value for your sorry page indirectly.
For example (let's assume you have 3 values)
1. You can create a ping page http://www.domain.com/ping.html. Contained in the ping.html page will hold a value.
2. You then create 3 F5 monitors associated to 3 new "dummy" pools. These pools will contain node members that will host the ping.html file
3. You then create an iRule similar to the one below
when CLIENT_ACCEPTED {
if { [active_members pool1] = 0 } {
pool pool7007
return
} else if {[active_member pool2] = 0 {
HTTP::respond 404 content "SORRY PAGEWe apologies, the website you are trying to reach is current experiencing technical difficulties"
return
}
}
The way it works is that monitor fails then the irule will catch the failure as a 0 available members in a specific pool which would then be triggered to "Do something" based on those condition
I hope this helps
Bhattman
