Revision f11280b5

b/lib/backend.py
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  result['DISK_COUNT'] = '%d' % len(instance.disks)
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  result['NIC_COUNT'] = '%d' % len(instance.nics)
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  result['DEBUG_LEVEL'] = '%d' % debug
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  if api_version >= constants.OS_API_V15:
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    try:
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      variant = instance.os.split('+', 1)[1]
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    except IndexError:
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      variant = os.supported_variants[0]
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    result['OS_VARIANT'] = variant
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  for idx, disk in enumerate(instance.disks):
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    real_disk = _RecursiveFindBD(disk)
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    if real_disk is None:

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