title: Kubernetes: how to using '--add-host'?
body: <p>my project need add 1 line to /etc/hosts, with docker i did:</p>
  
  <p><code>docker run --rm --add-host=kafka:10.0.x.xx kafka/backend</code></p>
  
  <p>I want add config in replication controller but can't find config or env.</p>
  
  <p>Pls suggest to me solution ? Thanks !!</p>