<disk type='network' device='disk'>
  <driver name='qemu' type='qcow2'/>
  <source protocol='nbd' tls='yes'>
    <host name='host1.example.com'/>
    <privateData>
      <nodenames>
        <nodename type='storage' name='node-a-s'/>
        <nodename type='format' name='node-b-f'/>
      </nodenames>
      <objects>
        <TLSx509 alias='node-a-s-tls0'/>
      </objects>
    </privateData>
  </source>
  <backingStore/>
  <target dev='vda' bus='virtio'/>
  <alias name='virtio-disk0'/>
</disk>
