title: How to resolve "failed to resolve host [elasticsearch-master-headless]"?
body: <p>I have deployed elasticsearch 6.5 using helm for my GKE cluster. I am getting the following error after I delete the helm deployment and install it.</p>
  
  <p>I have deleted the pods services and done restart. No issue with PVC. </p>
  
  <p>Error Logs : </p>
  
  <pre><code>[2019-10-18T10:14:10,021][INFO ][o.e.b.BootstrapChecks    ] [es-cluster-master-0] bound or publishing to a non-loopback address, enforcing bootstrap checks
  [2019-10-18T10:14:10,224][WARN ][o.e.d.z.UnicastZenPing   ] [es-cluster-master-0] failed to resolve host [elasticsearch-master-headless]
  java.net.UnknownHostException: elasticsearch-master-headless: Name or service not known
          at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[?:?]
          at java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:929) ~[?:?]
  
  
  [2019-10-18T10:14:10,021][INFO ][o.e.b.BootstrapChecks    ] [es-cluster-master-0] bound or publishing to a non-loopback address, enforcing bootstrap checks
  [2019-10-18T10:14:10,224][WARN ][o.e.d.z.UnicastZenPing   ] [es-cluster-master-0] failed to resolve host [elasticsearch-master-headless]
  java.net.UnknownHostException: elasticsearch-master-headless: Name or service not known
          at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[?:?]
          at java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:929) ~[?:?]
  </code></pre>