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[OpenStack Infra <1416132@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/221162
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=1345d0fe1cad5093d49a58b6f0b7f4cb650f61d8
Submitter: Jenkins
Branch:    master

commit 1345d0fe1cad5093d49a58b6f0b7f4cb650f61d8
Author: Abhijeet Malawade <Abhijeet.Malawade@xxxxxxxxxxx>
Date:   Fri Sep 4 00:21:47 2015 -0700

    Pass bdm info to _get_instance_disk_info method
    
    If bdm info is not passed to the '_get_instance_disk_info' method,
    then in case of processing qcow2 backing file, it raises permission
    denied error provided the backing is belonging to an attached and
    NFS-hosted Cinder volume.
    
    Passed bdm info to the '_get_instance_disk_info' method if any
    volumes are attached to the instance.
    
    Co-Authored-By: Ankit Agrawal <ankit11.agrawal@xxxxxxxxxxx>
    Closes-Bug: #1416132
    Change-Id: I5d5c64ea4d304022282ec9ab121e295f3c9e0d03


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

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https://bugs.launchpad.net/bugs/1416132

Title:
  _get_instance_disk_info fails to read files from NFS due to
  permissions

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  LibvirtDriver's _get_instance_disk_info calls
  libvirt_utils.get_disk_backing_file() if processing a qcow2 backing
  file.  If this is a file belonging to an attached and NFS-hosted
  Cinder volume, it may be owned by qemu:qemu and  therefore not
  readable as the nova user.

  [update: am now aiming at a different solution]
  My proposed solution is to run the images.qemu_img_info() call as root in this case.

  Note that this requires a change to grenade to upgrade the rootwrap configuration for gating to pass.
  [/update]

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