Forum Discussion
F5_Freek_243545
Nimbostratus
NimbostratusLTM pool availability on a GTM irule?
How can we select LTM pool availability on a GTM irule? Something like this?
when DNS_REQUEST {
if { [active_members LTM_Pool ] =< 3 } {
pool GTM_Pool
} else {
return
}
}
GTM does not know about LTM's pool members, except in the case where you are load balancing a DNS query to a pool of DNS servers for resolution. In the case of a wide IP, GTM does know about LTM's virtual servers, and can intelligently reply with the IP address of one of those based on criteria you define on the wide IP and wide IP pools, such as geolocation, global availability, etc. You could have GTM reply with the IP address of the LTM virtual server, and then apply an iRule to the LTM virtual server that selects the appropriate LTM pool based on pool member availability.
