vagrant-libvirt/spec/unit/action/create_domain_spec/additional_disks_domain.xml

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>vagrant-test_default</name>
  <title></title>
  <description>Source: /rootpath/Vagrantfile</description>
  <uuid></uuid>
  <memory>524288</memory>
  <vcpu>1</vcpu>
  <cpu mode='host-model'>
    <model fallback='allow'></model>
  </cpu>
  <os>
    <type>hvm</type>
    <kernel></kernel>
    <initrd></initrd>
    <cmdline></cmdline>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'>
  </clock>
  <devices>
    <disk type='file' device='disk'>
      <alias name='ua-box-volume-0'/>
      <driver name='qemu' type='qcow2' cache='default'/>
      <source file='/var/lib/libvirt/images/vagrant-test_default.img'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <disk type='file' device='disk'>
      <alias name='ua-disk-volume-0'/>
      <driver name='qemu' type='qcow2' cache='default'/>
      <source file='/var/lib/libvirt/images/vagrant-test_default-vdb.qcow2'/>
      <target dev='vdb' bus='virtio'/>
    </disk>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target port='0'/>
    </console>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1' keymap='en-us'/>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
    </video>
  </devices>
</domain>