1 __author__
= 'Administrator'
5 from mininet
.node
import OVSSwitch
8 from prometheus_client
import start_http_server
, Summary
, Histogram
, Gauge
, Counter
10 from subprocess
import Popen
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 # TODO put these in a list to support multiple metrics simultaneously
31 self
.vnf_interface
= None
32 self
.previous_measurement
= 0
33 self
.previous_monitor_time
= 0
34 self
.metric_key
= None
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'])
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
}
53 # list of installed metrics to monitor
54 # each entry can contain this data
60 previous_measurement = 0
61 previous_monitor_time = 0
66 self
.network_metrics
= []
68 # start monitoring thread
69 self
.monitor_thread
= threading
.Thread(target
=self
.get_network_metrics
)
70 self
.monitor_thread
.start()
73 self
.prometheus_process
= None
74 self
.cAdvisor_process
= None
77 # first set some parameters, before measurement can start
78 def setup_metric(self
, vnf_name
, vnf_interface
=None, metric
='tx_packets'):
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']
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
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']
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
)
110 # default port direction to monitor
112 metric
= 'tx_packets'
114 vnf_switch
= self
.net
.DCNetwork_graph
.neighbors(str(vnf_name
))
116 if len(vnf_switch
) > 1:
117 logging
.info("vnf: {0} has multiple ports".format(vnf_name
))
119 elif len(vnf_switch
) == 0:
120 logging
.info("vnf: {0} is not connected".format(vnf_name
))
123 vnf_switch
= vnf_switch
[0]
124 next_node
= self
.net
.getNodeByName(vnf_switch
)
126 if not isinstance(next_node
, OVSSwitch
):
127 logging
.info("vnf: {0} is not connected to switch".format(vnf_name
))
130 network_metric
['previous_measurement'] = 0
131 network_metric
['previous_monitor_time'] = 0
132 #self.previous_measurement = 0
133 #self.previous_monitor_time = 0
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)
140 self
.network_metrics
.append(network_metric
)
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
)
145 except Exception as ex
:
146 logging
.exception("get_rate error.")
150 # get all metrics defined in the list
151 def get_network_metrics(self
):
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 # call this function repeatedly for streaming measurements
172 def set_network_metric(self
, metric_dict
, port_stat_dict
):
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']
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_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 # call this function repeatedly for streaming measurements
213 def get_rate(self
, vnf_name
, vnf_interface
=None, direction
='tx', metric
='packets'):
215 key
= self
.metric_key
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))
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
)
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
236 byte_rate
= self
.get_rate(vnf_name
, vnf_interface
, direction
, metric
)
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))
243 self
.previous_measurement
= this_measurement
244 self
.previous_monitor_time
= port_uptime
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()
255 def start_Prometheus(self
, port
=9090):
259 "-p", "{0}:9090".format(port
),
260 "-v", "{0}/prometheus.yml:/etc/prometheus/prometheus.yml".format(getcwd()),
261 "--name", "prometheus",
265 self
.prometheus_process
= Popen(cmd
)
267 def start_cAdvisor(self
, port
=8090):
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
),
277 "google/cadvisor:latest"
279 self
.cAdvisor_process
= Popen(cmd
)
282 if self
.prometheus_process
is not None:
283 self
.prometheus_process
.terminate()
284 self
.prometheus_process
.kill()
286 if self
.cAdvisor_process
is not None:
287 self
.cAdvisor_process
.terminate()
288 self
.cAdvisor_process
.kill()