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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

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

** Changed in: nova
    Milestone: None => havana-1

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https://bugs.launchpad.net/bugs/1162029

Title:
  xenapi: nova_instance_uuid not set for root image

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  In the xenapi driver, VDIs should be annotated with the disk-type and
  instance-uuid in the `other_config` attribute.

  This is used to associate a VDI with an instance so that we can safely
  remove it in the event that it becomes orphaned (see
  cleanup_attached_vdis).

  Currently this is only being set in `create_vdi`. Unfortunately,
  doesn't account for root VDIs which are created implicitly by glance-
  plugin dropping a new VHD into the SR.

  The solution is to modify the glance-plugin (or the compute-calling
  code) to add the other config.

  For a cleanup script, we can populate VDI's that are missing this data
  by finding the sibling 'swap' VDI, and copying that info into the root
  VDI (changing disk type from swap to root).

  
  Things to account for:

  * Thin-provisioned images, does the `use_cow` path handle this?
  * Bit-torrented images
  * Snapshotted images

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