Host to pool mapping

Either a switch statement or a datagroup mapped to pool name as value would be my choices.

In the example above, you don't actually use both the switch statement and the if/else. It would look like this:

 
 when HTTP_REQUEST { 
     switch -glob [string tolower [HTTP::host]] { 
           "customer1*" { pool pool1 } 
           "customer2*" { pool pool2 } 
           "customer3*" { pool pool3 } 
    } 
 } 
  

If there's a character mapping between customer and pool, you could make this extremely easy...where something like "customerx = poolx"