title: How to specify multiple backends for TCP Load Balancer with Google Cloud Deployment Manager
body: <p>When creating a TCP load balancer in the web console, I can add multiple backend services  (see image below). I got everything working and now I'm trying to replicate it with Cloud Deployment Manager, but I can't figure out how to set multiple backend services to a TCP load balancer.</p>
  
  <p><a href="https://i.stack.imgur.com/FzJiD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FzJiD.png" alt="enter image description here"></a></p>
  
  <p>The <a href="https://cloud.google.com/compute/docs/reference/beta/forwardingRules" rel="nofollow noreferrer">Cloud Deployment Manager ForwardingRule documentation</a> only seems to allow a single <code>target</code>. Maybe a single target is all I need and instead I just need to connect multiple instance group managers to a single target pool? </p>
  
  <p>The problem with that, for me, is my instance group managers were created by Kubernetes and I don't see a way to connect an instance group manager to a target pool without redefining the instance group manager.</p>
  
  <p>Is there a way to add multiple backends/instance groups to a forwarding rule when the instance groups weren't created with deployment manager?</p>