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
.prometheus_process
= self
.start_Prometheus()
65 self
.cadvisor_process
= self
.start_cadvisor()
67 # first set some parameters, before measurement can start
68 def setup_metric(self
, vnf_name
, vnf_interface
=None, metric
='tx_packets'):
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']
79 network_metric
['vnf_name'] = vnf_name
80 network_metric
['vnf_interface'] = vnf_interface
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']
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
)
97 # default port direction to monitor
101 vnf_switch
= self
.net
.DCNetwork_graph
.neighbors(str(vnf_name
))
103 if len(vnf_switch
) > 1:
104 logging
.info("vnf: {0} has multiple ports".format(vnf_name
))
106 elif len(vnf_switch
) == 0:
107 logging
.info("vnf: {0} is not connected".format(vnf_name
))
110 vnf_switch
= vnf_switch
[0]
111 next_node
= self
.net
.getNodeByName(vnf_switch
)
113 if not isinstance(next_node
, OVSSwitch
):
114 logging
.info("vnf: {0} is not connected to switch".format(vnf_name
))
117 network_metric
['previous_measurement'] = 0
118 network_metric
['previous_monitor_time'] = 0
121 network_metric
['switch_dpid'] = int(str(next_node
.dpid
), 16)
122 network_metric
['metric_key'] = metric
124 self
.network_metrics
.append(network_metric
)
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
)
129 except Exception as ex
:
130 logging
.exception("setup_metric error.")
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
:
138 self
.network_metrics
.remove(metric_dict
)
140 #this removes the complete metric, all labels...
141 #REGISTRY.unregister(self.prom_metrics[metric_dict['metric_key']])
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'))
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
)
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
)
157 for dpid
in dpid_set
:
160 ret
= self
.REST_cmd('stats/port', dpid
)
161 port_stat_dict
= ast
.literal_eval(ret
)
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
)
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']
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))
188 # set prometheus metric
189 self
.prom_metrics
[metric_dict
['metric_key']].labels(vnf_name
, vnf_interface
).set(this_measurement
)
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')
197 byte_rate
= self
.get_network_metrics()
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))
204 metric_dict
['previous_measurement'] = this_measurement
205 metric_dict
['previous_monitor_time'] = port_uptime
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
)
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()
218 def start_Prometheus(self
, port
=9090):
219 # prometheus.yml configuration file is located in the same directory as this file
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",
228 logging
.info('Start Prometheus container {0}'.format(cmd
))
231 def start_cadvisor(self
, port
=8090):
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
),
241 "google/cadvisor:latest"
243 logging
.info('Start cAdvisor container {0}'.format(cmd
))
247 # stop the monitoring thread
248 self
.start_monitoring
= False
249 self
.monitor_thread
.join()
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')
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')
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
267 metric
= metric
.replace('tx','rx')
269 metric
= metric
.replace('rx','tx')
273 def _stop_container(self
, name
):