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
   9 import threading
  10 from subprocess import Popen
  11 from os import getcwd
  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         # TODO put these in a list to support multiple metrics simultaneously
  29         self.switch_dpid = 0
  30         self.vnf_name = None
  31         self.vnf_interface = None
  32         self.previous_measurement = 0
  33         self.previous_monitor_time = 0
  34         self.metric_key = None
  35         self.mon_port = None
  36
  37
  38         # Start up the server to expose the metrics to Prometheus.
  39         start_http_server(8000)
  40         # supported Prometheus metrics
  41         self.prom_tx_packet_count = Gauge('sonemu_tx_count_packets', 'Total number of packets sent',
  42                                           ['vnf_name', 'vnf_interface'])
  43         self.prom_rx_packet_count = Gauge('sonemu_rx_count_packets', 'Total number of packets received',
  44                                           ['vnf_name', 'vnf_interface'])
  45         self.prom_tx_byte_count = Gauge('sonemu_tx_count_bytes', 'Total number of bytes sent',
  46                                         ['vnf_name', 'vnf_interface'])
  47         self.prom_rx_byte_count = Gauge('sonemu_rx_count_bytes', 'Total number of bytes received',
  48                                         ['vnf_name', 'vnf_interface'])
  49
  50         self.prom_metrics={'tx_packets':self.prom_tx_packet_count, 'rx_packets':self.prom_rx_packet_count,
  51                            'tx_bytes':self.prom_tx_byte_count,'rx_bytes':self.prom_rx_byte_count}
  52
  53         # list of installed metrics to monitor
  54         # each entry can contain this data
  55         '''
  56         {
  57         switch_dpid = 0
  58         vnf_name = None
  59         vnf_interface = None
  60         previous_measurement = 0
  61         previous_monitor_time = 0
  62         metric_key = None
  63         mon_port = None
  64         }
  65         '''
  66         self.network_metrics = []
  67
  68         # start monitoring thread
  69         self.monitor_thread = threading.Thread(target=self.get_network_metrics)
  70         self.monitor_thread.start()
  71
  72         # helper tools
  73         self.prometheus_process = None
  74         self.cAdvisor_process = None
  75
  76
  77     # first set some parameters, before measurement can start
  78     def setup_metric(self, vnf_name, vnf_interface=None, metric='tx_packets'):
  79
  80         network_metric = {}
  81
  82         # check if port is specified (vnf:port)
  83         if vnf_interface is None:
  84             # take first interface by default
  85             connected_sw = self.net.DCNetwork_graph.neighbors(vnf_name)[0]
  86             link_dict = self.net.DCNetwork_graph[vnf_name][connected_sw]
  87             vnf_interface = link_dict[0]['src_port_id']
  88
  89         network_metric['vnf_name'] = vnf_name
  90         network_metric['vnf_interface'] = vnf_interface
  91         #self.vnf_name = vnf_name
  92         #self.vnf_interface = vnf_interface
  93
  94         for connected_sw in self.net.DCNetwork_graph.neighbors(vnf_name):
  95             link_dict = self.net.DCNetwork_graph[vnf_name][connected_sw]
  96             for link in link_dict:
  97                 # logging.info("{0},{1}".format(link_dict[link],vnf_interface))
  98                 if link_dict[link]['src_port_id'] == vnf_interface:
  99                     # found the right link and connected switch
 100                     # logging.info("{0},{1}".format(link_dict[link]['src_port_id'], vnf_source_interface))
 101                     network_metric['mon_port'] = link_dict[link]['dst_port']
 102                     # self.mon_port = link_dict[link]['dst_port']
 103                     break
 104
 105         if 'mon_port' not in network_metric:
 106             logging.exception("vnf interface {0}:{1} not found!".format(vnf_name,vnf_interface))
 107             return "vnf interface {0}:{1} not found!".format(vnf_name,vnf_interface)
 108
 109         try:
 110             # default port direction to monitor
 111             if metric is None:
 112                 metric = 'tx_packets'
 113
 114             vnf_switch = self.net.DCNetwork_graph.neighbors(str(vnf_name))
 115
 116             if len(vnf_switch) > 1:
 117                 logging.info("vnf: {0} has multiple ports".format(vnf_name))
 118                 return
 119             elif len(vnf_switch) == 0:
 120                 logging.info("vnf: {0} is not connected".format(vnf_name))
 121                 return
 122             else:
 123                 vnf_switch = vnf_switch[0]
 124             next_node = self.net.getNodeByName(vnf_switch)
 125
 126             if not isinstance(next_node, OVSSwitch):
 127                 logging.info("vnf: {0} is not connected to switch".format(vnf_name))
 128                 return
 129
 130             network_metric['previous_measurement'] = 0
 131             network_metric['previous_monitor_time'] = 0
 132             #self.previous_measurement = 0
 133             #self.previous_monitor_time = 0
 134
 135             network_metric['switch_dpid'] = int(str(next_node.dpid), 16)
 136             network_metric['metric_key'] = metric
 137             #self.switch_dpid = int(str(next_node.dpid), 16)
 138             #self.metric_key = '{0}_{1}'.format(direction, metric)
 139
 140             self.network_metrics.append(network_metric)
 141
 142             logging.info('Started monitoring: {2} on {0}:{1}'.format(vnf_name, vnf_interface, metric))
 143             return 'Started monitoring: {2} on {0}:{1}'.format(vnf_name, vnf_interface, metric)
 144
 145         except Exception as ex:
 146             logging.exception("get_rate error.")
 147             return ex.message
 148
 149
 150     # get all metrics defined in the list
 151     def get_network_metrics(self):
 152         while True:
 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     # call this function repeatedly for streaming measurements
 172     def set_network_metric(self, metric_dict, port_stat_dict):
 173
 174         metric_key = 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_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     # call this function repeatedly for streaming measurements
 213     def get_rate(self, vnf_name, vnf_interface=None, direction='tx', metric='packets'):
 214
 215             key = self.metric_key
 216
 217             ret = self.REST_cmd('stats/port', self.switch_dpid)
 218             port_stat_dict = ast.literal_eval(ret)
 219             for port_stat in port_stat_dict[str(self.switch_dpid)]:
 220                 if port_stat['port_no'] == self.mon_port:
 221                     port_uptime = port_stat['duration_sec'] + port_stat['duration_nsec'] * 10 ** (-9)
 222                     this_measurement = int(port_stat[key])
 223                     #logging.info('packets:{0}'.format(this_measurement))
 224
 225                     # set prometheus metrics
 226                     if metric == 'packets':
 227                         self.prom_tx_packet_count.labels(self.vnf_name, self.vnf_interface).set(this_measurement)
 228                     elif metric == 'bytes':
 229                         self.prom_tx_byte_count.labels(self.vnf_name, self.vnf_interface).set(this_measurement)
 230
 231                     if self.previous_monitor_time <= 0 or self.previous_monitor_time >= port_uptime:
 232                         self.previous_measurement = int(port_stat[key])
 233                         self.previous_monitor_time = port_uptime
 234                         # do first measurement
 235                         time.sleep(1)
 236                         byte_rate = self.get_rate(vnf_name, vnf_interface, direction, metric)
 237                         return byte_rate
 238                     else:
 239                         time_delta = (port_uptime - self.previous_monitor_time)
 240                         byte_rate = (this_measurement - self.previous_measurement) / float(time_delta)
 241                         #logging.info('uptime:{2} delta:{0} rate:{1}'.format(time_delta,byte_rate,port_uptime))
 242
 243                     self.previous_measurement = this_measurement
 244                     self.previous_monitor_time = port_uptime
 245                     return byte_rate
 246
 247             return ret
 248
 249     def REST_cmd(self, prefix, dpid):
 250         url = self.REST_api + '/' + str(prefix) + '/' + str(dpid)
 251         req = urllib2.Request(url)
 252         ret = urllib2.urlopen(req).read()
 253         return ret
 254
 255     def start_Prometheus(self, port=9090):
 256         cmd = ["docker",
 257                "run",
 258                "--rm",
 259                "-p", "{0}:9090".format(port),
 260                "-v", "{0}/prometheus.yml:/etc/prometheus/prometheus.yml".format(getcwd()),
 261                "--name", "prometheus",
 262                "prom/prometheus"
 263                ]
 264
 265         self.prometheus_process = Popen(cmd)
 266
 267     def start_cAdvisor(self, port=8090):
 268         cmd = ["docker",
 269                "run",
 270                "--rm",
 271                "--volume=/:/rootfs:ro",
 272                "--volume=/var/run:/var/run:rw",
 273                "--volume=/sys:/sys:ro",
 274                "--volume=/var/lib/docker/:/var/lib/docker:ro",
 275                "--publish={0}:8080".format(port),
 276                "--name=cadvisor",
 277                "google/cadvisor:latest"
 278                ]
 279         self.cAdvisor_process = Popen(cmd)
 280
 281     def stop(self):
 282         if self.prometheus_process is not None:
 283             self.prometheus_process.terminate()
 284             self.prometheus_process.kill()
 285
 286         if self.cAdvisor_process is not None:
 287             self.cAdvisor_process.terminate()
 288             self.cAdvisor_process.kill()