title: Unknown/unsupported storage engine: InnoDB
body: <p>I'm setting up a replication server and when I try to start the mysql service for the first time, it fails: </p>
  
  <pre><code>[root@ravioli mysql]# service mysqld start
  MySQL Daemon failed to start.
  Starting mysqld:                                           [FAILED]
  [root@ravioli mysql]# tail /var/log/mysqld.log 
  151013 13:41:27 [ERROR] Plugin 'InnoDB' init function returned error.
  151013 13:41:27 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
  /usr/libexec/mysqld: File '/databases/mysql/mysql_slow_queries.log' not found (Errcode: 13)
  151013 13:41:27 [ERROR] Could not use /databases/mysql/mysql_slow_queries.log for logging (error 13). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it.
  151013 13:41:27 [ERROR] Unknown/unsupported storage engine: InnoDB
  151013 13:41:27 [ERROR] Aborting
  
  151013 13:41:27 [Note] /usr/libexec/mysqld: Shutdown complete
  
  151013 13:41:27 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
  </code></pre>
  
  <p>I confirmed that user <code>mysql</code> sees and is able to write to <code>/databases/mysql/mysql_slow_queries.log</code>. </p>
  
  <p>Then I checked <code>getenforce</code> and see it is set to <code>Enforcing</code>.</p>
  
  <p>How do I configure MySQL to play nicely with SELinux? </p>