iRule for cookie based load balancing

Better view of iRule:

when HTTP_REQUEST {

if { [HTTP::cookie exists gcbSessionServer] } {

switch [HTTP::cookie value "gcbSessionServer"] {

".Co-browse_TENCBSD0_Node1" {
    pool cct-cobrowse-ct-node-1_pool 
}
".Co-browse_TENCBSD0_Node2" { 
    pool cct-cobrowse-ct-node-2_pool 
}
".Co-browse_TENCBSD0_Node3" { 
    pool cct-cobrowse-ct-node-3_pool 
}

} }

else {

    pool /Common/cct-cobrowse-ct.app/cct-cobrowse-ct_pool
    log local0. " Selected pool [LB::select] "

}

}

Can you try to log the cookie value using local0 ? It may help to understand what the F5 is actually seeing in the iRule and will help you to rewrite iRule if required.

Hi,

I don't think you need to check if the cookie exists first, as HTTP::cookie value will return a null length string even if the cookie name doesn't exist.

Your problem is that "[HTTP::cookie exist "gcbSessionServer"]" have to return 0 or 1 but it seems that in your irule is empty.

so try this, we can try another thing if it's not working

when HTTP_REQUEST { 

switch -glob ([HTTP::cookie value "gcbSessionServer"]) {
    ".Co-browse_TENCBSD0_Node1" { pool cct-cobrowse-ct-node-1_pool } 
    ".Co-browse_TENCBSD0_Node2" { pool cct-cobrowse-ct-node-2_pool } 
    ".Co-browse_TENCBSD0_Node3" { pool cct-cobrowse-ct-node-3_pool } 
    default {
    pool /Common/cct-cobrowse-ct.app/cct-cobrowse-ct_pool 
    log local0. " Selected pool [LB::select] "
    }
}

}

keep me in touch.

Regards