vol-gluster-dir.xml

<volume type='netdir'>
  <name>dir</name>
  <key>vol/dir</key>
  <source>
  </source>
  <capacity unit='bytes'>0</capacity>
  <allocation unit='bytes'>0</allocation>
  <target>
    <path>gluster://example.com/vol/dir</path>
    <format type='dir'/>
    <permissions>
      <mode>0600</mode>
    </permissions>
  </target>
</volume>