src/emuvim/dcemulator/monitoring.py

   1 __author__ = 'Administrator'
   2
   3 import urllib2
   4 import logging
   5 from mininet.node import  OVSSwitch
   6 import ast
   7 import time
   8 from prometheus_client import start_http_server, Summary, Histogram, Gauge, Counter, REGISTRY
   9 import threading
  10 from subprocess import Popen, PIPE
  11 import os
  12
  13 logging.basicConfig(level=logging.INFO)
  14
  15 """
  16 class to read openflow stats from the Ryu controller of the DCNetwork
  17 """
  18
  19 class DCNetworkMonitor():
  20     def __init__(self, net):
  21         self.net = net
  22         # link to Ryu REST_API
  23         self.ip = '0.0.0.0'
  24         self.port = '8080'
  25         self.REST_api = 'http://{0}:{1}'.format(self.ip,self.port)
  26
  27         # helper variables to calculate the metrics
  28         # Start up the server to expose the metrics to Prometheus.
  29         start_http_server(8000)
  30         # supported Prometheus metrics
  31         self.prom_tx_packet_count = Gauge('sonemu_tx_count_packets', 'Total number of packets sent',
  32                                           ['vnf_name', 'vnf_interface'])
  33         self.prom_rx_packet_count = Gauge('sonemu_rx_count_packets', 'Total number of packets received',
  34                                           ['vnf_name', 'vnf_interface'])
  35         self.prom_tx_byte_count = Gauge('sonemu_tx_count_bytes', 'Total number of bytes sent',
  36                                         ['vnf_name', 'vnf_interface'])
  37         self.prom_rx_byte_count = Gauge('sonemu_rx_count_bytes', 'Total number of bytes received',
  38                                         ['vnf_name', 'vnf_interface'])
  39
  40         self.prom_metrics={'tx_packets':self.prom_tx_packet_count, 'rx_packets':self.prom_rx_packet_count,
  41                            'tx_bytes':self.prom_tx_byte_count,'rx_bytes':self.prom_rx_byte_count}
  42
  43         # list of installed metrics to monitor
  44         # each entry can contain this data
  45         '''
  46         {
  47         switch_dpid = 0
  48         vnf_name = None
  49         vnf_interface = None
  50         previous_measurement = 0
  51         previous_monitor_time = 0
  52         metric_key = None
  53         mon_port = None
  54         }
  55         '''
  56         self.network_metrics = []
  57
  58         # start monitoring thread
  59         self.start_monitoring = True
  60         self.monitor_thread = threading.Thread(target=self.get_network_metrics)
  61         self.monitor_thread.start()
  62
  63         # helper tools
  64         self.prometheus_process = self.start_Prometheus()
  65         self.cadvisor_process = self.start_cadvisor()
  66
  67     # first set some parameters, before measurement can start
  68     def setup_metric(self, vnf_name, vnf_interface=None, metric='tx_packets'):
  69
  70         network_metric = {}
  71
  72         # check if port is specified (vnf:port)
  73         if vnf_interface is None:
  74             # take first interface by default
  75             connected_sw = self.net.DCNetwork_graph.neighbors(vnf_name)[0]
  76             link_dict = self.net.DCNetwork_graph[vnf_name][connected_sw]
  77             vnf_interface = link_dict[0]['src_port_id']
  78
  79         network_metric['vnf_name'] = vnf_name
  80         network_metric['vnf_interface'] = vnf_interface
  81
  82         for connected_sw in self.net.DCNetwork_graph.neighbors(vnf_name):
  83             link_dict = self.net.DCNetwork_graph[vnf_name][connected_sw]
  84             for link in link_dict:
  85                 # logging.info("{0},{1}".format(link_dict[link],vnf_interface))
  86                 if link_dict[link]['src_port_id'] == vnf_interface:
  87                     # found the right link and connected switch
  88                     # logging.info("{0},{1}".format(link_dict[link]['src_port_id'], vnf_source_interface))
  89                     network_metric['mon_port'] = link_dict[link]['dst_port']
  90                     break
  91
  92         if 'mon_port' not in network_metric:
  93             logging.exception("vnf interface {0}:{1} not found!".format(vnf_name,vnf_interface))
  94             return "vnf interface {0}:{1} not found!".format(vnf_name,vnf_interface)
  95
  96         try:
  97             # default port direction to monitor
  98             if metric is None:
  99                 metric = 'tx_packets'
 100
 101             vnf_switch = self.net.DCNetwork_graph.neighbors(str(vnf_name))
 102
 103             if len(vnf_switch) > 1:
 104                 logging.info("vnf: {0} has multiple ports".format(vnf_name))
 105                 return
 106             elif len(vnf_switch) == 0:
 107                 logging.info("vnf: {0} is not connected".format(vnf_name))
 108                 return
 109             else:
 110                 vnf_switch = vnf_switch[0]
 111             next_node = self.net.getNodeByName(vnf_switch)
 112
 113             if not isinstance(next_node, OVSSwitch):
 114                 logging.info("vnf: {0} is not connected to switch".format(vnf_name))
 115                 return
 116
 117             network_metric['previous_measurement'] = 0
 118             network_metric['previous_monitor_time'] = 0
 119
 120
 121             network_metric['switch_dpid'] = int(str(next_node.dpid), 16)
 122             network_metric['metric_key'] = metric
 123
 124             self.network_metrics.append(network_metric)
 125
 126             logging.info('Started monitoring: {2} on {0}:{1}'.format(vnf_name, vnf_interface, metric))
 127             return 'Started monitoring: {2} on {0}:{1}'.format(vnf_name, vnf_interface, metric)
 128
 129         except Exception as ex:
 130             logging.exception("setup_metric error.")
 131             return ex.message
 132
 133     def stop_metric(self, vnf_name, vnf_interface, metric):
 134         for metric_dict in self.network_metrics:
 135             if metric_dict['vnf_name'] == vnf_name and metric_dict['vnf_interface'] == vnf_interface \
 136                     and metric_dict['metric_key'] == metric:
 137
 138                 self.network_metrics.remove(metric_dict)
 139
 140                 #this removes the complete metric, all labels...
 141                 #REGISTRY.unregister(self.prom_metrics[metric_dict['metric_key']])
 142
 143                 # set values to NaN, prometheus api currently does not support removal of metrics
 144                 self.prom_metrics[metric_dict['metric_key']].labels(vnf_name, vnf_interface).set(float('nan'))
 145
 146                 logging.info('Stopped monitoring: {2} on {0}:{1}'.format(vnf_name, vnf_interface, metric))
 147                 return 'Stopped monitoring: {2} on {0}:{1}'.format(vnf_name, vnf_interface, metric)
 148
 149
 150     # get all metrics defined in the list and export it to Prometheus
 151     def get_network_metrics(self):
 152         while self.start_monitoring:
 153             # group metrics by dpid to optimize the rest api calls
 154             dpid_list = [metric_dict['switch_dpid'] for metric_dict in self.network_metrics]
 155             dpid_set = set(dpid_list)
 156
 157             for dpid in dpid_set:
 158
 159                 # query Ryu
 160                 ret = self.REST_cmd('stats/port', dpid)
 161                 port_stat_dict = ast.literal_eval(ret)
 162
 163                 metric_list = [metric_dict for metric_dict in self.network_metrics
 164                                if int(metric_dict['switch_dpid'])==int(dpid)]
 165                 #logging.info('1set prom packets:{0} '.format(self.network_metrics))
 166                 for metric_dict in metric_list:
 167                     self.set_network_metric(metric_dict, port_stat_dict)
 168
 169             time.sleep(1)
 170
 171     # add metric to the list to export to Prometheus, parse the Ryu port-stats reply
 172     def set_network_metric(self, metric_dict, port_stat_dict):
 173         # vnf tx is the datacenter switch rx and vice-versa
 174         metric_key = self.switch_tx_rx(metric_dict['metric_key'])
 175         switch_dpid = metric_dict['switch_dpid']
 176         vnf_name = metric_dict['vnf_name']
 177         vnf_interface = metric_dict['vnf_interface']
 178         previous_measurement = metric_dict['previous_measurement']
 179         previous_monitor_time = metric_dict['previous_monitor_time']
 180         mon_port = metric_dict['mon_port']
 181
 182         for port_stat in port_stat_dict[str(switch_dpid)]:
 183             if int(port_stat['port_no']) == int(mon_port):
 184                 port_uptime = port_stat['duration_sec'] + port_stat['duration_nsec'] * 10 ** (-9)
 185                 this_measurement = int(port_stat[metric_key])
 186                 #logging.info('set prom packets:{0} {1}:{2}'.format(this_measurement, vnf_name, vnf_interface))
 187
 188                 # set prometheus metric
 189                 self.prom_metrics[metric_dict['metric_key']].labels(vnf_name, vnf_interface).set(this_measurement)
 190
 191                 if previous_monitor_time <= 0 or previous_monitor_time >= port_uptime:
 192                     metric_dict['previous_measurement'] = int(port_stat[metric_key])
 193                     metric_dict['previous_monitor_time'] = port_uptime
 194                     # do first measurement
 195                     #logging.info('first measurement')
 196                     time.sleep(1)
 197                     byte_rate = self.get_network_metrics()
 198                     return byte_rate
 199                 else:
 200                     time_delta = (port_uptime - metric_dict['previous_monitor_time'])
 201                     byte_rate = (this_measurement - metric_dict['previous_measurement']) / float(time_delta)
 202                     # logging.info('uptime:{2} delta:{0} rate:{1}'.format(time_delta,byte_rate,port_uptime))
 203
 204                 metric_dict['previous_measurement'] = this_measurement
 205                 metric_dict['previous_monitor_time'] = port_uptime
 206                 return byte_rate
 207
 208         logging.exception('metric {0} not found on {1}:{2}'.format(metric_key, vnf_name, vnf_interface))
 209         return 'metric {0} not found on {1}:{2}'.format(metric_key, vnf_name, vnf_interface)
 210
 211
 212     def REST_cmd(self, prefix, dpid):
 213         url = self.REST_api + '/' + str(prefix) + '/' + str(dpid)
 214         req = urllib2.Request(url)
 215         ret = urllib2.urlopen(req).read()
 216         return ret
 217
 218     def start_Prometheus(self, port=9090):
 219         # prometheus.yml configuration file is located in the same directory as this file
 220         cmd = ["docker",
 221                "run",
 222                "--rm",
 223                "-p", "{0}:9090".format(port),
 224                "-v", "{0}/prometheus.yml:/etc/prometheus/prometheus.yml".format(os.path.dirname(os.path.abspath(__file__))),
 225                "--name", "prometheus",
 226                "prom/prometheus"
 227                ]
 228         logging.info('Start Prometheus container {0}'.format(cmd))
 229         return Popen(cmd)
 230
 231     def start_cadvisor(self, port=8090):
 232         cmd = ["docker",
 233                "run",
 234                "--rm",
 235                "--volume=/:/rootfs:ro",
 236                "--volume=/var/run:/var/run:rw",
 237                "--volume=/sys:/sys:ro",
 238                "--volume=/var/lib/docker/:/var/lib/docker:ro",
 239                "--publish={0}:8080".format(port),
 240                "--name=cadvisor",
 241                "google/cadvisor:latest"
 242                ]
 243         logging.info('Start cAdvisor container {0}'.format(cmd))
 244         return Popen(cmd)
 245
 246     def stop(self):
 247         # stop the monitoring thread
 248         self.start_monitoring = False
 249         self.monitor_thread.join()
 250
 251         if self.prometheus_process is not None:
 252             logging.info('stopping prometheus container')
 253             self.prometheus_process.terminate()
 254             self.prometheus_process.kill()
 255             self._stop_container('prometheus')
 256
 257         if self.cadvisor_process is not None:
 258             logging.info('stopping cadvisor container')
 259             self.cadvisor_process.terminate()
 260             self.cadvisor_process.kill()
 261             self._stop_container('cadvisor')
 262
 263     def switch_tx_rx(self,metric=''):
 264         # when monitoring vnfs, the tx of the datacenter switch is actually the rx of the vnf
 265         # so we need to change the metric name to be consistent with the vnf rx or tx
 266         if 'tx' in metric:
 267             metric = metric.replace('tx','rx')
 268         elif 'rx' in metric:
 269             metric = metric.replace('rx','tx')
 270
 271         return metric
 272
 273     def _stop_container(self, name):
 274         cmd = ["docker",
 275                "stop",
 276                name]
 277         Popen(cmd).wait()
 278
 279         cmd = ["docker",
 280                "rm",
 281                name]
 282         Popen(cmd).wait()
 283
 284