iRule configuration for sending requests to specific pool members depending on user input

Not sure if you need a data group for that list of URLs as it's pretty small. If it will change frequently, then externalizing it might be a good idea. Something like this should get you going

when HTTP_REQUEST {
  switch -glob [string tolower [HTTP::uri]] {
    "/marines*" -
    "/mrt*" -
    "/mrtnet*" -
    "/mrtsurvey*" -
    "/navy*" -
    "/protected*" -
    "/rto*" -
    "/saat*" -
    "/saat2*" -
    "/sftfamily*" -
    "/sftservice*" -
    "/survey*" -
    "/images*" -
    "/resources*" -
    "/mrtemail*" -
    "/scripts*" -
    "/styles*" -
    "/trainingcenters*" -
    "/ultimateme*" {
      node 10.10.10.10 80
    }
    "/programs*" {
      node 10.10.10.20 80
    }
    default {
      node 10.10.10.30 80
    }
  }
}

This is assuming that the URLs you mentioned you want to match on partial matches, not exact. The "/Marines_" for instance would match any URL that starts with "/Marines". One caveat is that "/MRTABC" would match on "/MRT_" so you may need to clarify the matches a bit more to ensure you don't get any incorrect assignments.

Also, if it were me, I'd create 3 pools instead of a single pool with 3 members. Assign member 10.10.10.30:80 to the default pool for the virtual and then use the "pool" command instead of "node" in the first two cases. Also, if servers or IP's change, it's a pool configuration change, not an iRule change.

Hope this helps...

-Joe