Dynamic Pool Names

I'd like to be able to select which pool to use based on some data in the HTTP request, but I don't want to have to hard code the pools in the iRule. Is it possible to dynamically create the pool name (stored in a variable) and then select the pool using that?

 

 

The pool command seems to take the name as if it's a literal, not a variable, meaning you do:

 

 

pool my_pool1

 

instead of

 

pool "my_pool1"

 

 

Is it possible to use strings or variables as the pool name? For instance, could I do

 

something like:

 

 

when HTTP_REQUEST {
   Pool number stored in pid query param
  set poolID [findstr [HTTP:uri] "pid=" 4 "&"]
  set poolName "my_pool$poolID"
  pool $poolName  
}

 

 

or maybe

 

when HTTP_REQUEST {
   Pool number stored in pid query param
  set poolID [findstr [HTTP:uri] "pid=" 4 "&"]
  pool "my_pool$poolID"
}

 

 

(my code might not be quite right. I haven't written an iRule in about a year and my dev F5 box isn't working right now so I can't test it).