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[Michael Still <mikal@xxxxxxxxxxx>]

Sounds like this bug has come back.

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

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https://bugs.launchpad.net/bugs/1370590

Title:
  Libvirt _create_domain_and_network calls missing disk_info

Status in OpenStack Compute (nova):
  New

Bug description:
  When boot from block/volume was started for libvirt-lxc, a check was
  added to _create_domain_setup_lxc that uses disk_info to determine
  whether or not the instance was booted from block. While the spawn
  call provides disk_info via a kwarg to _create_domain_and_network,
  many other operations leave that information off. These calls now need
  to provide disk_info to _create_domain_and_network so that it is
  available to determine whether or not the instance was booted from
  block/volume. Without that data, the check will erroneously determine
  that the instance was booted from a volume.

  Steps to reproduce:
  1) Create devstack with local.conf: https://gist.github.com/ramielrowe/520b0b86a5adf385b45d
  2) Boot instance from image
  3) Stop the instance
  4) Start the instance
  5) Observe exception in nova-compute logs: https://gist.github.com/ramielrowe/5cc2cb372fd019ee8331

  In the stack trace you can see Nova has attempted to set up the
  instance as if it was booted from volume.

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