HTTP health monitor using iRule

Thank you all for your valuable suggestions on my requirement !!

 

 

Finally I could achieve this with little different approach with the help of F5 supports of course !!

 

 

I split the pool into active & standby nodes and then I configured iRule to detect active members in the pool with the help of health monitor for individual pool.

 

 

below is the iRule for this config.

 

 

VS1->pool1->site1-active

 

VS2->pool2->site2-active

 

VS3->pool3->site3-active

 

pool4->site1-standby

 

pool5->site2-standby

 

pool6->site3-standby

 

 

For irule, there are three irules and should be applied to VS configuration seperately.

 

 

1) iRule1-->VS1:

 

when HTTP_REQUEST {

 

if { ([active_members pool1] < 1) or ([active_members pool2] < 1) or ([active_members pool3] < 1) } {

 

pool pool4

 

} else {

 

pool pool1

 

}

 

}

 

 

2) iRule2->VS2:

 

when HTTP_REQUEST {

 

if { ([active_members pool1] < 1) or ([active_members pool2] < 1) or ([active_members pool3] < 1) } {

 

pool pool5

 

} else {

 

pool pool2

 

}

 

}

 

 

3) iRule3->VS3:

 

when HTTP_REQUEST {

 

if { ([active_members pool1] < 1) or ([active_members pool2] < 1) or ([active_members pool3] < 1) } {

 

pool pool6

 

} else {

 

pool pool3

 

}

 

}