join.py 文件源码

def _get_allowed_hostclass(self, project_name):
        """Get the allowed list of hostclass from configuration."""
        try:
            group = CONF[project_name]
        except cfg.NoSuchOptError:
            # dynamically add the group into the configuration
            group = cfg.OptGroup(project_name, 'project options')
            CONF.register_group(group)
            CONF.register_opt(cfg.ListOpt('allowed_classes'),
                              group=project_name)
        try:
            allowed_classes = CONF[project_name].allowed_classes
        except cfg.NoSuchOptError:
            LOG.error('No allowed_classes config option in [%s]', project_name)
            return []
        else:
            if allowed_classes:
                return allowed_classes
            else:
                return []