Comment 0 for bug 2065451

We created an instance and then rebooted it, but the instance xml is changed after we reboot it, the following lines were added to the xml:

    <input type='keyboard' bus='usb'>
      <alias name='input1'/>
      <address type='usb' bus='0' port='2'/>
    </input>

We read the nova code, find that the input device info was refreshed into nova db using the following line: nova.virt.libvirt.driver.LibvirtDriver.spawn#self._register_undefined_instance_details(context, instance),

but when the instance is booting, nova.virt.libvirt.driver.LibvirtDriver.spawn#xml = self._get_guest_xml(context, instance, network_info, disk_info, image_meta, block_device_info=block_device_info, mdevs=mdevs, accel_info=accel_info) record the xml without the usb keyboard, this may be the trick.

Thank you for looking into it.