title: Unable to get docker and zookeeper to connect docker
body: <p>I have the following two containers started but kafka says connection refused.</p>
  
  <p><code>docker run zookeeper</code> and <code>docker run wurstmeister/kafka</code></p>
  
  <p>I run it just like that and the connection is refused. In the logs it says:</p>
  
  <blockquote>
    <p>INFO Opening socket connection to server localhost/127.0.0.1:2181.
    Will not attempt to authenticate using SASL (unknown error)
    (org.apache.zookeeper.ClientCnxn)</p>
  </blockquote>
  
  <p>then:</p>
  
  <blockquote>
    <p>WARN Session 0x0 for server null, unexpected error, closing socket
    connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
    java.net.ConnectException: Connection refused</p>
  </blockquote>
  
  <p>zookeeper is started first and it on 2181, when starting kafka it looks at 2181 "zookeeper" then blows up on me. Advice?</p>