<disk device='disk' name='vda'>
  <driver type='qcow2'/>
  <source file='/var/lib/libvirt/images/i.qcow2'>
    <privateData>
      <nodenames>
        <nodename type='storage' name='0123456789ABCDEF0123456789ABCDE'/>
        <nodename type='format' name='0123456789ABCDEF0123456789ABCDE'/>
      </nodenames>
    </privateData>
    <encryption format='luks'>
      <secret type='passphrase' uuid='f52a81b2-424e-490c-823d-6bd4235bc572'/>
    </encryption>
  </source>
</disk>
