title: GCP Load Balancer with multiple applications and ports
body: <p>I am struggling to get the load balancer to work with more than one application. My setup:</p>
  
  <pre><code>Applications: Web1 (Port 10000), Web2 (Port 11000), Web3 (Port 12000)
  Servers: Serv1, Serv2, Serv3.
  </code></pre>
  
  <p>All servers are identical and have Web1, Web2 and Web3 listening on port: 10000, 11000, 12000 respectively.</p>
  
  <p>How can I instruct the load balancer to do the following:</p>
  
  <pre><code>web1.domain.com -----&gt; use Serv1,Serv2,Serv3 port 10000. 
  web2.domain.com -----&gt; use Serv1,Serv2,Serv3 port 11000. 
  web3.domain.com -----&gt; use Serv1,Serv2,Serv3 port 12000.
  </code></pre>
  
  <p>I managed to get it working with 1 application but I can't create 3 load balancers as the servers already belongs to a different instance group.</p>
  
  <p>I have read about the port name mapping, but the load balancer keeps ignoring those and uses its own generated one called 'http'.</p>
  
  <p>Has anyone faced any similar issues?</p>