iRule to use specific server based on URL/URI request

If you create two separate pools, you can create two corresponding HTTP classes. The first class would check for paths (URIs) matching /project* and have the /project pool assigned. The second HTTP class would have no filters and have the VS's default pool assigned. The project HTTP class would look like this in the bigip.conf:

profile httpclass project_httpclass {
   defaults from httpclass
   pool project_http_pool
   redirect none
   paths "/project*"
}

Or if you don't like the idea of using HTTP classes for this pool selection logic, you could create a new project pool named project_http_pool and use an iRule like this to select between the VS default pool and the project pool:

when CLIENT_ACCEPTED {
    Save the name of the VS default pool
   set default_pool [LB::server pool]
}
when HTTP_REQUEST {
    Check the requested path with wildcard matching
   switch -glob [HTTP::path] {
      "/project*" {
          /project URI
         pool project_http_pool
      }
      default {
          non-/project URI
         pool $default_pool
      }
   }
}

Aaron