title: Docker container access to swarm IPs
body: <p>When running docker containers a swarm cluster do the containers have access to all the IPs of the cluster nodes via ENV variables or otherwise?</p>
  
  <p>I want to run an Elasticsearch instance on each node in my swarm the cluster. And they will discovery each other in unicast mode. Therefore each Elasticsearch instanc needs to be configured with the list of IPs in the cluster.</p>