title: Is it possible to tell which application instance serves the request on Cloud Foundry?
body: <p>As you know, an application on Cloud Foundry could have more than 1 instances. Sometime, all or some of them need be configured through the HTTP Request, like altering the logger level. But due to the load balance, round-robin, one user's multiple requests may be routed to different instances. So, for the user, I didn't find a way to specify which instance to be configured, or tell which instance has already been configured. </p>
  
  <p>Does anyone know this trick? Or is it possible to send HTTP request to all of the instances?</p>