1 __author__
= 'Administrator'
5 from mininet
.node
import OVSSwitch
8 from prometheus_client
import start_http_server
, Summary
, Histogram
, Gauge
, Counter
, REGISTRY
10 from subprocess
import Popen
, PIPE
13 logging
.basicConfig(level
=logging
.INFO
)
16 class to read openflow stats from the Ryu controller of the DCNetwork
19 class DCNetworkMonitor():
20 def __init__(self
, net
):
22 # link to Ryu REST_API
25 self
.REST_api
= 'http://{0}:{1}'.format(self
.ip
,self
.port
)
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'])
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
}
43 # list of installed metrics to monitor
44 # each entry can contain this data
50 previous_measurement = 0
51 previous_monitor_time = 0
56 self
.network_metrics
= []
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()
64 self
.pushgateway_process
= self
.start_PushGateway()
65 self
.prometheus_process
= self
.start_Prometheus()
66 self
.cadvisor_process
= self
.start_cadvisor()
68 # first set some parameters, before measurement can start
69 def setup_metric(self
, vnf_name
, vnf_interface
=None, metric
='tx_packets'):
73 # check if port is specified (vnf:port)
74 if vnf_interface
is None:
75 # take first interface by default
76 connected_sw
= self
.net
.DCNetwork_graph
.neighbors(vnf_name
)[0]
77 link_dict
= self
.net
.DCNetwork_graph
[vnf_name
][connected_sw
]
78 vnf_interface
= link_dict
[0]['src_port_id']
80 network_metric
['vnf_name'] = vnf_name
81 network_metric
['vnf_interface'] = vnf_interface
83 for connected_sw
in self
.net
.DCNetwork_graph
.neighbors(vnf_name
):
84 link_dict
= self
.net
.DCNetwork_graph
[vnf_name
][connected_sw
]
85 for link
in link_dict
:
86 # logging.info("{0},{1}".format(link_dict[link],vnf_interface))
87 if link_dict
[link
]['src_port_id'] == vnf_interface
:
88 # found the right link and connected switch
89 # logging.info("{0},{1}".format(link_dict[link]['src_port_id'], vnf_source_interface))
90 network_metric
['mon_port'] = link_dict
[link
]['dst_port']
93 if 'mon_port' not in network_metric
:
94 logging
.exception("vnf interface {0}:{1} not found!".format(vnf_name
,vnf_interface
))
95 return "vnf interface {0}:{1} not found!".format(vnf_name
,vnf_interface
)
98 # default port direction to monitor
100 metric
= 'tx_packets'
102 vnf_switch
= self
.net
.DCNetwork_graph
.neighbors(str(vnf_name
))
104 if len(vnf_switch
) > 1:
105 logging
.info("vnf: {0} has multiple ports".format(vnf_name
))
107 elif len(vnf_switch
) == 0:
108 logging
.info("vnf: {0} is not connected".format(vnf_name
))
111 vnf_switch
= vnf_switch
[0]
112 next_node
= self
.net
.getNodeByName(vnf_switch
)
114 if not isinstance(next_node
, OVSSwitch
):
115 logging
.info("vnf: {0} is not connected to switch".format(vnf_name
))
118 network_metric
['previous_measurement'] = 0
119 network_metric
['previous_monitor_time'] = 0
122 network_metric
['switch_dpid'] = int(str(next_node
.dpid
), 16)
123 network_metric
['metric_key'] = metric
125 self
.network_metrics
.append(network_metric
)
127 logging
.info('Started monitoring: {2} on {0}:{1}'.format(vnf_name
, vnf_interface
, metric
))
128 return 'Started monitoring: {2} on {0}:{1}'.format(vnf_name
, vnf_interface
, metric
)
130 except Exception as ex
:
131 logging
.exception("setup_metric error.")
134 def stop_metric(self
, vnf_name
, vnf_interface
, metric
):
135 for metric_dict
in self
.network_metrics
:
136 if metric_dict
['vnf_name'] == vnf_name
and metric_dict
['vnf_interface'] == vnf_interface \
137 and metric_dict
['metric_key'] == metric
:
139 self
.network_metrics
.remove(metric_dict
)
141 #this removes the complete metric, all labels...
142 #REGISTRY.unregister(self.prom_metrics[metric_dict['metric_key']])
144 # set values to NaN, prometheus api currently does not support removal of metrics
145 self
.prom_metrics
[metric_dict
['metric_key']].labels(vnf_name
, vnf_interface
).set(float('nan'))
147 logging
.info('Stopped monitoring: {2} on {0}:{1}'.format(vnf_name
, vnf_interface
, metric
))
148 return 'Stopped monitoring: {2} on {0}:{1}'.format(vnf_name
, vnf_interface
, metric
)
151 # get all metrics defined in the list and export it to Prometheus
152 def get_network_metrics(self
):
153 while self
.start_monitoring
:
154 # group metrics by dpid to optimize the rest api calls
155 dpid_list
= [metric_dict
['switch_dpid'] for metric_dict
in self
.network_metrics
]
156 dpid_set
= set(dpid_list
)
158 for dpid
in dpid_set
:
161 ret
= self
.REST_cmd('stats/port', dpid
)
162 port_stat_dict
= ast
.literal_eval(ret
)
164 metric_list
= [metric_dict
for metric_dict
in self
.network_metrics
165 if int(metric_dict
['switch_dpid'])==int(dpid
)]
166 #logging.info('1set prom packets:{0} '.format(self.network_metrics))
167 for metric_dict
in metric_list
:
168 self
.set_network_metric(metric_dict
, port_stat_dict
)
172 # add metric to the list to export to Prometheus, parse the Ryu port-stats reply
173 def set_network_metric(self
, metric_dict
, port_stat_dict
):
174 # vnf tx is the datacenter switch rx and vice-versa
175 metric_key
= self
.switch_tx_rx(metric_dict
['metric_key'])
176 switch_dpid
= metric_dict
['switch_dpid']
177 vnf_name
= metric_dict
['vnf_name']
178 vnf_interface
= metric_dict
['vnf_interface']
179 previous_measurement
= metric_dict
['previous_measurement']
180 previous_monitor_time
= metric_dict
['previous_monitor_time']
181 mon_port
= metric_dict
['mon_port']
183 for port_stat
in port_stat_dict
[str(switch_dpid
)]:
184 if int(port_stat
['port_no']) == int(mon_port
):
185 port_uptime
= port_stat
['duration_sec'] + port_stat
['duration_nsec'] * 10 ** (-9)
186 this_measurement
= int(port_stat
[metric_key
])
187 #logging.info('set prom packets:{0} {1}:{2}'.format(this_measurement, vnf_name, vnf_interface))
189 # set prometheus metric
190 self
.prom_metrics
[metric_dict
['metric_key']].labels(vnf_name
, vnf_interface
).set(this_measurement
)
192 if previous_monitor_time
<= 0 or previous_monitor_time
>= port_uptime
:
193 metric_dict
['previous_measurement'] = int(port_stat
[metric_key
])
194 metric_dict
['previous_monitor_time'] = port_uptime
195 # do first measurement
196 #logging.info('first measurement')
198 byte_rate
= self
.get_network_metrics()
201 time_delta
= (port_uptime
- metric_dict
['previous_monitor_time'])
202 byte_rate
= (this_measurement
- metric_dict
['previous_measurement']) / float(time_delta
)
203 # logging.info('uptime:{2} delta:{0} rate:{1}'.format(time_delta,byte_rate,port_uptime))
205 metric_dict
['previous_measurement'] = this_measurement
206 metric_dict
['previous_monitor_time'] = port_uptime
209 logging
.exception('metric {0} not found on {1}:{2}'.format(metric_key
, vnf_name
, vnf_interface
))
210 return 'metric {0} not found on {1}:{2}'.format(metric_key
, vnf_name
, vnf_interface
)
213 def REST_cmd(self
, prefix
, dpid
):
214 url
= self
.REST_api
+ '/' + str(prefix
) + '/' + str(dpid
)
215 req
= urllib2
.Request(url
)
216 ret
= urllib2
.urlopen(req
).read()
219 def start_Prometheus(self
, port
=9090):
220 # prometheus.yml configuration file is located in the same directory as this file
224 "-p", "{0}:9090".format(port
),
225 "-v", "{0}/prometheus.yml:/etc/prometheus/prometheus.yml".format(os
.path
.dirname(os
.path
.abspath(__file__
))),
226 "--name", "prometheus",
229 logging
.info('Start Prometheus container {0}'.format(cmd
))
232 def start_PushGateway(self
, port
=9091):
236 "-p", "{0}:9091".format(port
),
237 "--name", "pushgateway",
241 logging
.info('Start Prometheus Push Gateway container {0}'.format(cmd
))
244 def start_cadvisor(self
, port
=8090):
248 "--volume=/:/rootfs:ro",
249 "--volume=/var/run:/var/run:rw",
250 "--volume=/sys:/sys:ro",
251 "--volume=/var/lib/docker/:/var/lib/docker:ro",
252 "--publish={0}:8080".format(port
),
254 "google/cadvisor:latest"
256 logging
.info('Start cAdvisor container {0}'.format(cmd
))
260 # stop the monitoring thread
261 self
.start_monitoring
= False
262 self
.monitor_thread
.join()
264 if self
.prometheus_process
is not None:
265 logging
.info('stopping prometheus container')
266 self
.prometheus_process
.terminate()
267 self
.prometheus_process
.kill()
268 self
._stop
_container
('prometheus')
270 if self
.pushgateway_process
is not None:
271 logging
.info('stopping pushgateway container')
272 self
.pushgateway_process
.terminate()
273 self
.pushgateway_process
.kill()
274 self
._stop
_container
('pushgateway')
276 if self
.cadvisor_process
is not None:
277 logging
.info('stopping cadvisor container')
278 self
.cadvisor_process
.terminate()
279 self
.cadvisor_process
.kill()
280 self
._stop
_container
('cadvisor')
282 def switch_tx_rx(self
,metric
=''):
283 # when monitoring vnfs, the tx of the datacenter switch is actually the rx of the vnf
284 # so we need to change the metric name to be consistent with the vnf rx or tx
286 metric
= metric
.replace('tx','rx')
288 metric
= metric
.replace('rx','tx')
292 def _stop_container(self
, name
):