Forum Discussion
nertolf28200
Nimbostratus
NimbostratusiRule for reset TCP connection if pool down
Hello, I have a kind of health monitor for my DNS (tcp half open) which check every 30sec the VS on my F5 LTM.
I would like the LTM reset connection when the VS is down. I tried this irule, my flow is deny by BIG IP even if I have my VS up.
when FLOW_INIT {
if { [active_members [LB::server pool]] == 0 } {
reject
}
Thanks for your help!
You don't need to run an iRule when all pool members down. Set the "Action On Service Down feature" within the virtual server to "reject": https://support.f5.com/csp/article/K15095.
The irule doesn't work because you can not use a LB: (loadbalance) when FLOW_INIT - there hasn't been a LB decision yet.
use something like: when FLOW_INIT { if { [active_members http-pool] == 0 } { reset } }
