+ # call this function repeatedly for streaming measurements\r
+ def set_network_metric(self, metric_dict, port_stat_dict):\r
+\r
+ metric_key = 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_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
+\r
+\r
+ # call this function repeatedly for streaming measurements\r
+ def get_rate(self, vnf_name, vnf_interface=None, direction='tx', metric='packets'):\r
+\r
+ key = self.metric_key\r
+\r
+ ret = self.REST_cmd('stats/port', self.switch_dpid)\r