LB::server addr

I'm not sure what you are expecting [LB::server addr] to return. This provides the address of the load-balanced pool member. At the time HTTP_REQUEST event is evaluated, the load-balancing decision has not been made yet, therefore LB::server addr likely does not have anything to return (unless you previously used a node or pool command to directly select the node). So, yes, this is expected behavior. The LB_SELECTED event is triggered after the load-balancing decision has been made.

 

 

Perhaps you can elaborate on why you need to check the node being used in the HTTP_REQUEST event. You likely want to put that logic in the LB_SELECTED event. You should still be able to add/modify headers or cookies in that event.