title: No running PostgreSQL in ps
body: <p>My PostgreSQL has gone insane - the service command says it works perferctly fine, but when I try to ps it is not visible. Any attepts to log are unsuccesful:</p>
  
  <pre><code>postgres@vanqyard:~$ psql
  psql: could not connect to server: No such file or directory
      Is the server running locally and accepting
      connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
  </code></pre>
  
  <p>service and ps output:</p>
  
  <pre><code># service postgresql status
  ● postgresql.service - PostgreSQL RDBMS
     Loaded: loaded (/lib/systemd/system/postgresql.service; enabled)
     Active: active (exited) since Wed 2017-04-19 22:07:09 CEST; 2min 15s ago
    Process: 15737 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
   Main PID: 15737 (code=exited, status=0/SUCCESS)
  
  Apr 19 22:07:09 systemd[1]: Started PostgreSQL RDBMS.
  # ps aux | grep postgresql
  root     15999  0.0  0.0  12728  2220 pts/1    S+   22:09   0:00 grep postgresql
  </code></pre>
  
  <p>It used to work fine until I started playing with supervisord.</p>
  
  <p>How do I make postgres work again?</p>