api.py

提供一个 main 方法，可以命令行手动启动 API 服务（作为 REST 服务）。

def main():
    logging.register_options(cfg.CONF)
    service.prepare_service(sys.argv)

    app = api_app.setup_app()

    # Create the WSGI server and start it
    host, port = cfg.CONF.api.host, cfg.CONF.api.port
    srv = simple_server.make_server(host, port, app)

    LOG.info(_LI('Starting server in PID %s') % os.getpid())
    LOG.debug("Configuration:")
    cfg.CONF.log_opt_values(LOG, std_logging.DEBUG)

    if host == '0.0.0.0':
        LOG.info(_LI('serving on 0.0.0.0:%(port)s, '
                     'view at http://127.0.0.1:%(port)s') %
                 dict(port=port))
    else:
        LOG.info(_LI('serving on http://%(host)s:%(port)s') %
                 dict(host=host, port=port))

    srv.serve_forever()