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[Alan Pevec <1219658@xxxxxxxxxxxxxxxxxx>]

** Changed in: nova/havana
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1219658

Title:
  Wrong image size using rbd backend for libvirt

Status in OpenStack Compute (nova) havana series:
  Fix Released
Status in “nova” package in Ubuntu:
  Fix Released
Status in “nova” source package in Trusty:
  Fix Released

Bug description:
  [Impact]

   * The original fix for bug 1219658 introduced a factor of 1024 error
   in the resulting rbd image size. Big impact.

  [Test Case]

   * To have icehouse openstack using rbd image backend for libvirt:
   
  Images seem to be 1024 larger than expected.

  For example (comment #3):

  # rbd -p images info ae9d23f0-b5a0-4d92-a15d-b3f23d276c72_disk rbd image 'ae9d23f0-b5a0-4d92-a15d-b3f23d276c72_disk':
          size 20480 GB in 5242880 objects
          order 22 (4096 kB objects)
          block_name_prefix: rbd_data.1cac92ae8944a
          format: 2
          features: layering

  when the expect size should be 20 GB.

  [Regression Potential]

   * Fix is running in a big production without any problem.

   * RDB backend could stop working (keeping the bug will eventualy cause
     an outage for those who use rdb backend)

  [Other Info]

  For rbd image backend for libvirt, the root partition will use the
  image size not 'disk' size. It lack of resize root volume in the
  codes.

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