def _AllLVs(self):
    lvnames = set()
    for instance in self._ConfigData().instances.values():
      node_data = self._UnlockedGetInstanceLVsByNode(instance.uuid)
      for lv_list in node_data.values():
        lvnames.update(lv_list)
    return lvnames
Compute the list of all LVs.
dataset/ETHPy150Open ganeti/ganeti/lib/config/__init__.py/ConfigWriter._AllLVs