Revision c09f363f

b/lib/cmdlib.py
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    instance_list = self.cfg.GetInstanceList()
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    if new_name in instance_list:
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      raise errors.OpPrereqError("Instance '%s' is already in the cluster" %
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                                 instance_name)
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                                 new_name)
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    if not getattr(self.op, "ignore_ip", False):
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      command = ["fping", "-q", name_info.ip]

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