title: RabbitMQ failed install/start on Debian Stretch
body: <p>Following a </p>
  
  <pre><code>sudo apt-get install rabbitmq-server
  </code></pre>
  
  <p>I'm hitting errors when the service attempts to start (also when using <code>systemctl start</code>):</p>
  
  <pre><code>● rabbitmq-server.service - RabbitMQ Messaging Server
    Loaded: loaded (/lib/systemd/system/rabbitmq-server.service; enabled; vendor preset: enabled)
    Active: failed (Result: exit-code) since Wed 2017-07-26 15:59:41 IDT; 4min 28s ago
    Process: 17895 ExecStartPost=/usr/lib/rabbitmq/bin/rabbitmq-server-wait (code=exited, status=70)
    Process: 17894 ExecStart=/usr/sbin/rabbitmq-server (code=exited, status=1/FAILURE)
   Main PID: 17894 (code=exited, status=1/FAILURE)
  </code></pre>
  
  <p>That's in <code>systemctl status</code>. In <code>journalctl -xe</code>:</p>
  
  <pre><code>-- Unit rabbitmq-server.service has begun starting up.
  Jul 26 15:59:37 myhost rabbitmq[17895]: Waiting for rabbit@myhost ...
  Jul 26 15:59:37 myhost rabbitmq[17895]: pid is 17903 ...
  Jul 26 15:59:40 myhost systemd[1]: rabbitmq-server.service: Main process exited, code=exited, status=1/FAILURE
  Jul 26 15:59:41 myhost rabbitmq[17895]: Error: process_not_running
  Jul 26 15:59:41 myhost systemd[1]: rabbitmq-server.service: Control process exited, code=exited status=70
  Jul 26 15:59:41 myhost systemd[1]: Failed to start RabbitMQ Messaging Server.
  -- Subject: Unit rabbitmq-server.service has failed
  -- Defined-By: systemd
  -- Support: https://www.debian.org/support
  -- 
  -- Unit rabbitmq-server.service has failed.
  -- 
  -- The result is failed.
  Jul 26 15:59:41 myhost systemd[1]: rabbitmq-server.service: Unit entered failed state.
  Jul 26 15:59:41 myhost systemd[1]: rabbitmq-server.service: Failed with result 'exit-code'.
  </code></pre>