HTTP_RESPONSE codes

That should work to mark a pool member as down if the response code isn't a 200. However, there are many instances where a web server could legitimately reply with a non-200 response. Take a look at the HTTP 1.1 RFC's section on response codes for examples:

 

 

http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

 

 

You might be better off looking only for 50x errors, as these indicate a server-side error. You might also want to select a new node

 

 

when HTTP_RESPONSE {
   if {[HTTP::status] starts_with {5}}{
      LB::down
   }
}

 

 

You could also look into reselecting a new pool member if the request does generate a 5xx response, using LB::reselect.

 

 

Aaron