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

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

** Changed in: nova
    Milestone: None => kilo-2

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https://bugs.launchpad.net/bugs/1378132

Title:
  Hard-reboots ignore root_device_name

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Hard-rebooting an instance causes the root_device_name to get
  ignored/reset, which can cause wailing and gnashing of teeth if the
  guest operating system is expecting it to not do that.

  Steps to reproduce:

  1. Stand up a devstack
  2. Load the openrc with admin credentials
  3. glance image-update --property root_device_name=sda SOME_CIRROS_IMAGE
  4. Spawn a cirros instance using the above image. The root filesystem should present as being mounted on /dev/sda1, and the libvirt.xml should show the disk with a target of "scsi"
  5. Hard-reboot the instance

  Expected Behaviour

  The instance comes back up with the same hardware configuration as it
  had when initially spawned, i.e., with its root filesystem attached to
  a SCSI bus

  Actual Behaviour

  The instance comes back with its root filesystem attached to an IDE
  bus.

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