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[Alvaro Lopez <1201334@xxxxxxxxxxxxxxxxxx>]

I think this was already solved in
https://review.openstack.org/#/c/58999/

** Tags added: xen

** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1201334

Title:
  libvirt disk_mappings returns bad root disk for Xen paravirtualization

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  
  I noticed that during launching Xen paravirtualization instances over libvirt driver, root_device_name is returned as '/dev/xvda' and has to be '/dev/xvda1'. 

  /usr/lib64/python2.6/site-packages/nova/virt/libvirt/driver.py

  lines 2190-2228
              if CONF.libvirt_type == "xen" and guest.os_type == vm_mode.XEN:
  ---->       guest.os_root = root_device_name
              else:
                  guest.os_type = vm_mode.HVM

  I would like propose some simple patch for this and replace hard coded
  root device by pygrub option.

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