manager.py 文件源码

def __init__(self, *args, **kwargs):
        LOG.warning(_LW('The cells feature of Nova is considered experimental '
                        'by the OpenStack project because it receives much '
                        'less testing than the rest of Nova. This may change '
                        'in the future, but current deployers should be aware '
                        'that the use of it in production right now may be '
                        'risky. Also note that cells does not currently '
                        'support rolling upgrades, it is assumed that cells '
                        'deployments are upgraded lockstep so n-1 cells '
                        'compatibility does not work.'))
        # Mostly for tests.
        cell_state_manager = kwargs.pop('cell_state_manager', None)
        super(CellsManager, self).__init__(service_name='cells',
                                           *args, **kwargs)
        if cell_state_manager is None:
            cell_state_manager = cells_state.CellStateManager
        self.state_manager = cell_state_manager()
        self.msg_runner = messaging.MessageRunner(self.state_manager)
        cells_driver_cls = importutils.import_class(
                CONF.cells.driver)
        self.driver = cells_driver_cls()
        self.instances_to_heal = iter([])