Disable BGP route adv when pool member < 2

Maybe the following?

• route adv. will stop when the VS is down
• trick is to bring the VS down if < 2 pool member (not standard behaviour: down if all)

If we create a new "status VS" (with reserved IP, port 80) and apply a similar Irule to it

when HTTP_REQUEST { 
         if { [active_members ] <= 1 } { 
                     log local0. "not enough members in pool " 
                     HTTP::respond 503
         } 
         else { 
                     log local0. "enough members in pool " 
                     HTTP::respond 200 content "UP"
         } 
         default { 
                     HTTP::respond 503 
                     log local0. "monitor check error" 
         } 

Then we put the pool members to this VS

We add a HTTP monitor (with specific IP/Port of "status VS") to the original pool and require all monitors to be UP