+ # query Ryu\r
+ ret = self.REST_cmd('stats/port', dpid)\r
+ port_stat_dict = ast.literal_eval(ret)\r
+\r
+ metric_list = [metric_dict for metric_dict in self.network_metrics\r
+ if int(metric_dict['switch_dpid'])==int(dpid)]\r
+ #logging.info('1set prom packets:{0} '.format(self.network_metrics))\r
+ for metric_dict in metric_list:\r
+ self.set_network_metric(metric_dict, port_stat_dict)\r
+\r
+ time.sleep(1)\r
+\r
+ # add metric to the list to export to Prometheus, parse the Ryu port-stats reply\r
+ def set_network_metric(self, metric_dict, port_stat_dict):\r
+ # vnf tx is the datacenter switch rx and vice-versa\r
+ metric_key = self.switch_tx_rx(metric_dict['metric_key'])\r
+ switch_dpid = metric_dict['switch_dpid']\r
+ vnf_name = metric_dict['vnf_name']\r
+ vnf_interface = metric_dict['vnf_interface']\r
+ previous_measurement = metric_dict['previous_measurement']\r
+ previous_monitor_time = metric_dict['previous_monitor_time']\r
+ mon_port = metric_dict['mon_port']\r
+\r
+ for port_stat in port_stat_dict[str(switch_dpid)]:\r
+ if int(port_stat['port_no']) == int(mon_port):\r
+ port_uptime = port_stat['duration_sec'] + port_stat['duration_nsec'] * 10 ** (-9)\r
+ this_measurement = int(port_stat[metric_key])\r
+ #logging.info('set prom packets:{0} {1}:{2}'.format(this_measurement, vnf_name, vnf_interface))\r
+\r
+ # set prometheus metric\r
+ self.prom_metrics[metric_dict['metric_key']].labels(vnf_name, vnf_interface).set(this_measurement)\r
+\r
+ if previous_monitor_time <= 0 or previous_monitor_time >= port_uptime:\r
+ metric_dict['previous_measurement'] = int(port_stat[metric_key])\r
+ metric_dict['previous_monitor_time'] = port_uptime\r
+ # do first measurement\r
+ #logging.info('first measurement')\r
+ time.sleep(1)\r
+ byte_rate = self.get_network_metrics()\r
+ return byte_rate\r
+ else:\r
+ time_delta = (port_uptime - metric_dict['previous_monitor_time'])\r
+ byte_rate = (this_measurement - metric_dict['previous_measurement']) / float(time_delta)\r
+ # logging.info('uptime:{2} delta:{0} rate:{1}'.format(time_delta,byte_rate,port_uptime))\r
+\r
+ metric_dict['previous_measurement'] = this_measurement\r
+ metric_dict['previous_monitor_time'] = port_uptime\r
+ return byte_rate\r
+\r
+ logging.exception('metric {0} not found on {1}:{2}'.format(metric_key, vnf_name, vnf_interface))\r
+ return 'metric {0} not found on {1}:{2}'.format(metric_key, vnf_name, vnf_interface)\r