envmanager_devops.py 文件源码

def revert_snapshot(self, name):
        """Revert snapshot by name

        - Revert a libvirt snapshots for all nodes in the environment
        - Try to reload 'config' object from a file 'config_<name>.ini'
          If the file not found, then pass with defaults.
        - Set <name> as the current state of the environment after reload

        :param name: string
        """
        if not settings.MAKE_SNAPSHOT_STAGES:
            LOG.info("SKIP reverting from snapshot '{0}' "
                     "because MAKE_SNAPSHOT_STAGES=false".format(name))
            return

        LOG.info("Reverting from snapshot named '{0}'".format(name))
        if self.__env is not None:
            self.__env.revert(name=name)
            LOG.info("Resuming environment after revert")
            self.__env.resume()
        else:
            raise exceptions.EnvironmentIsNotSet()

        try:
            test_config_path = self._get_snapshot_config_name(name)
            settings_oslo.reload_snapshot_config(self.__config,
                                                 test_config_path)
        except cfg.ConfigFilesNotFoundError as conf_err:
            LOG.error("Config file(s) {0} not found!".format(
                conf_err.config_files))

        self.__config.hardware.current_snapshot = name