libvirt/tests/qemuxml2argvdata/disk-network-source-curl-nbdkit-backing.xml

<domain type='qemu'>
  <name>QEMUGuest1</name>
  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
  <memory unit='KiB'>219136</memory>
  <currentMemory unit='KiB'>219136</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc'>hvm</type>
    <boot dev='hd'/>
  </os>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='network' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source protocol='https' name='path/to/disk1.qcow2'>
        <host name='https.example.org' port='8443'/>
        <cookies>
            <cookie name='cookie1'>cookievalue1</cookie>
            <cookie name='cookie2'>cookievalue2</cookie>
        </cookies>
      </source>
      <backingStore type='network'>
          <format type='qcow2'/>
          <source protocol='https' name='path/to/backing.qcow2'>
              <host name='https.example2.org' port='8444'/>
              <cookies>
                  <cookie name='cookie3'>cookievalue3</cookie>
                  <cookie name='cookie4'>cookievalue4</cookie>
              </cookies>
          </source>
      </backingStore>
      <target dev='vda' bus='virtio'/>
      <readonly/>
    </disk>
    <controller type='usb' index='0'/>
    <controller type='pci' index='0' model='pci-root'/>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <memballoon model='none'/>
  </devices>
</domain>