Similar feature to LB::status under v9.0.5

You could still pick the specific pool member and if it turns out to be down, the LB_FAILED event would be triggered and you could reselect another pool member or repick the pool to have it load-balance to any other available pool member. The LB::server command is available in 9.0.5 and it will return the currently selected pool/member so you can test which pool member is down. You may also want to use a variable to additionally control the behavior in the LB_FAILED event since it may be triggered multiple times in the event additional pool members are down.

 

Thanks for the very quick reply. We used the function active_members which I was not aware before.

 

 

Let me explain what we do, as a reference:

 

 

- we only have 2 servers, each one runs 2 services Svc1 and Svc2

 

- the request logic is:

 

* a request must go to a server with Svc1 up

 

* if there is node with Svc2 up, go to this node

 

 

We create 2 pools, each one with the same 2 servers but each pool has its own monitor, pool1 monitor svc1 and pool2 monitors svc2.

 

 

The irule becomes:

 

 

if active_members(pool1) < 2

 

because we have only 2 servers, only 1 has svc1 up, so go to this one

 

pool pool1

 

else

 

we have 2 servers with svc1 up

 

if active_members(pool2) > 0

 

svc2 is up on at least 1 node, use pool2 to load balance

 

pool pool2

 

else

 

svc2 is down on both servers, load balance

 

pool pool1

 

 

A bit complex, but it achieves our purpose.

 

 

Thanks again

 

rather straight foward. Srv1 = COM+ and Svc2 = MQ

BIG-IP sees only HTTPs traffic encrypted by web server

when CLIENT_ACCEPTED {
  log "Client accepted"
  if { [active_members Test_iRule_HTTPS_Pool] < 2 } {
    log "0 or 1 HTTPS (COM+) node up -> use HTTPS pool Test_iRule_HTTPS_Pool"
    pool Test_iRule_HTTPS_Pool
  }
  else {
     2 nodes up on POOL_HTTPS
    if { [active_members Test_iRule_MQ_Pool] > 0 } {
      log "2 HTTPS (COM+) nodes up, 1 or 2 MQ nodes up -> use MQ pool Test_iRule_MQ_Pool"
      pool Test_iRule_MQ_Pool
    }
    else {
      log "2 HTTPS (COM+) nodes up, 0 MQ node up -> use HTTPS pool Test_iRule_HTTPS_Pool"
      pool Test_iRule_HTTPS_Pool
    }
  }
}