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[Tan Lin <tan.lin.good@xxxxxxxxx>]

** No longer affects: ironic

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https://bugs.launchpad.net/bugs/1400269

Title:
  unable to destroy bare-metal instance when flavor is deleted

Status in OpenStack Compute (Nova):
  In Progress

Bug description:
  Get error if delete flavor before delete instance.
  This is caused by ironic driver in nova.
  We have below code in _cleanup_deploy function in nova/virt/ironic/driver.py
  if flavor is None:
              # TODO(mrda): It would be better to use instance.get_flavor() here
              # but right now that doesn't include extra_specs which are required
              flavor = objects.Flavor.get_by_id(context,
                                                instance['instance_type_id'])
  So if the flavor is deleted before we destroy bare metal node, we get FlavorNotFoud exception without handling.

  
  At same time, I found the flavor is used to clean deploy ramdisk/kernel in driver_info, which was plan to remove in Kilo, are we ready for that?

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