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[H3C iMC <tianshuli614@xxxxxxx>]

Public bug reported:

The vm system disk data was overided by glance image data when
evacuating a vm on shared storage.

The nova/compute/manager.py file in icehouse version:

    @object_compat
    @messaging.expected_exceptions(exception.PreserveEphemeralNotSupported)
    @wrap_exception()
    @reverts_task_state
    @wrap_instance_event
    @wrap_instance_fault
    def rebuild_instance(self, context, instance, orig_image_ref, image_ref,
                         injected_files, new_pass, orig_sys_metadata,
                         bdms, recreate, on_shared_storage,
                         preserve_ephemeral=False):
     **********
            kwargs = dict(
                context=context,
                instance=instance,
                image_meta=image_meta,
                injected_files=files,
                admin_password=new_pass,
                bdms=bdms,
                detach_block_devices=detach_block_devices,
                attach_block_devices=self._prep_block_device,
                block_device_info=block_device_info,
                network_info=network_info,
                preserve_ephemeral=preserve_ephemeral)

             
the kwargs lost parameter  recreate=recreate, and it result in the  data always destroyed when a vm evacuated.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1372472

Title:
   The vm system disk data was overided by glance image data when
  evacuating a vm on shared storage

Status in OpenStack Compute (Nova):
  New

Bug description:
  The vm system disk data was overided by glance image data when
  evacuating a vm on shared storage.

  The nova/compute/manager.py file in icehouse version:

      @object_compat
      @messaging.expected_exceptions(exception.PreserveEphemeralNotSupported)
      @wrap_exception()
      @reverts_task_state
      @wrap_instance_event
      @wrap_instance_fault
      def rebuild_instance(self, context, instance, orig_image_ref, image_ref,
                           injected_files, new_pass, orig_sys_metadata,
                           bdms, recreate, on_shared_storage,
                           preserve_ephemeral=False):
       **********
              kwargs = dict(
                  context=context,
                  instance=instance,
                  image_meta=image_meta,
                  injected_files=files,
                  admin_password=new_pass,
                  bdms=bdms,
                  detach_block_devices=detach_block_devices,
                  attach_block_devices=self._prep_block_device,
                  block_device_info=block_device_info,
                  network_info=network_info,
                  preserve_ephemeral=preserve_ephemeral)

               
  the kwargs lost parameter  recreate=recreate, and it result in the  data always destroyed when a vm evacuated.

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