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[Rui Chen <chenrui.momo@xxxxxxxxx>]

Public bug reported:

I try to attach a volume to iso instance, return code of volume-attach
api is 200 ok, but the volume can't be attached to instance in fact,
there are some error messages in nova-compute.log like this
'libvirtError: Requested operation is not valid: target hda already
exists'.

The root device of iso instance is hda, nova-compute should not assign
hda to cinder volume again.

The following is reproduce steps:

1. boot instance from iso image.
2. create a cinder volume.
3. try to attach the volume to iso instance.

Attaching volume is failed, I can find libvirt error in nova-
compute.log.

http://paste.openstack.org/show/105144/

** Affects: nova
     Importance: Undecided
     Assignee: Rui Chen (kiwik-chenrui)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Rui Chen (kiwik-chenrui)

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https://bugs.launchpad.net/bugs/1379212

Title:
  Attaching volume to iso instance is failure because of duplicate
  device name 'hda'.

Status in OpenStack Compute (Nova):
  New

Bug description:
  I try to attach a volume to iso instance, return code of volume-attach
  api is 200 ok, but the volume can't be attached to instance in fact,
  there are some error messages in nova-compute.log like this
  'libvirtError: Requested operation is not valid: target hda already
  exists'.

  The root device of iso instance is hda, nova-compute should not assign
  hda to cinder volume again.

  The following is reproduce steps:

  1. boot instance from iso image.
  2. create a cinder volume.
  3. try to attach the volume to iso instance.

  Attaching volume is failed, I can find libvirt error in nova-
  compute.log.

  http://paste.openstack.org/show/105144/

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