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[niusmallnan <zhangzb@xxxxxxxxx>]

This bug fix is a duplicate of the following bug and fix.
https://bugs.launchpad.net/nova/+bug/1478199
https://review.openstack.org/#/c/205766/

** Changed in: nova
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1529581

Title:
  delete RBD residual data when unrescue a vm

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  
  the code in nova/virt/libvirt/driver.py :

  def unrescue(self, instance, network_info):
          ......
          ......
          rescue_files = os.path.join(instance_dir, "*.rescue")
          for rescue_file in glob.iglob(rescue_files):
              libvirt_utils.file_delete(rescue_file)
          # cleanup rescue volume
          lvm.remove_volumes([lvmdisk for lvmdisk in self._lvm_disks(instance)
                                  if lvmdisk.endswith('.rescue')])

  
  Only delete the local file and lvm volumes, so what about RBD?

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