Revision b2482333

b/lib/cmdlib.py
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    """
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    if self.op.vg_name is not None:
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      if self.op.vg_name != self.cfg.GetVGName():
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        self.cfg.SetVGName(self.op.vg_name)
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      new_volume = self.op.vg_name
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      if not new_volume:
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        new_volume = None
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      if new_volume != self.cfg.GetVGName():
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        self.cfg.SetVGName(new_volume)
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      else:
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        feedback_fn("Cluster LVM configuration already in desired"
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                    " state, not changing")

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