1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
# Copyright (c) 2016 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Performance testing traffic generator library."""
from robot.api import logger
from resources.libraries.python.ssh import SSH
from resources.libraries.python.topology import NodeType
from resources.libraries.python.topology import NodeSubTypeTG
__all__ = ['TrafficGenerator']
class TrafficGenerator(object):
"""Traffic Generator"""
def __init__(self):
self._result = None
self._loss = None
self._sent = None
self._received = None
@staticmethod
def initialize_traffic_generator(node, interface1, interface2):
"""TG initialization
:param node: Traffic generator node
:param interface1: PCI address of first interface
:param interface2: PCI address of second interface
:type node: dict
:type interface1: str
:type interface2: str
:return: nothing
"""
trex_path = "/opt/trex-core-1.91"
if node['type'] != NodeType.TG:
raise Exception('Node type is not a TG')
if node['subtype'] == NodeSubTypeTG.TREX:
ssh = SSH()
ssh.connect(node)
(ret, stdout, stderr) = ssh.exec_command(
"sh -c 'cd {0}/scripts/ && "
"sudo ./trex-cfg'"\
.format(trex_path))
(ret, stdout, stderr) = ssh.exec_command(
"sh -c 'cd {0}/scripts/ && "
"sudo nohup ./t-rex-64 -i -c 4 --iom 0 > /dev/null 2>&1 &'"
"> /dev/null"\
.format(trex_path))
@staticmethod
def teardown_traffic_generator(node):
"""TG teardown
:param node: Traffic generator node
:type node: dict
:return: nothing
"""
if node['type'] != NodeType.TG:
raise Exception('Node type is not a TG')
if node['subtype'] == NodeSubTypeTG.TREX:
ssh = SSH()
ssh.connect(node)
(ret, stdout, stderr) = ssh.exec_command(
"sh -c 'sudo pkill t-rex'")
def send_traffic_on(self, nodes_info, duration, rate,
framesize, traffic_type):
"""Send traffic from all configured interfaces on TG
:param nodes_info: Dictionary containing information on all nodes
in topology.
:param duration: Duration of test traffic generation in seconds
:param rate: Offered load per interface (e.g. 1%, 3gbps, 4mpps, ...)
:param framesize: Frame size (L2) in Bytes
:param traffic_type: Traffic profile
:type nodes_info: dict
:type duration: str
:type rate: str
:type framesize: str
:type traffic_type: str
:return: TG output
:rtype: str
"""
node = nodes_info["TG"]
if node['type'] != NodeType.TG:
raise Exception('Node type is not a TG')
if node['subtype'] is None:
raise Exception('TG subtype not defined')
ssh = SSH()
ssh.connect(node)
if node['subtype'] == NodeSubTypeTG.TREX:
if traffic_type in ["3-node-xconnect", "3-node-bridge"]:
(ret, stdout, stderr) = ssh.exec_command(
"sh -c '/tmp/openvpp-testing/resources/tools/t-rex-stateless.py "
"-d {0} -r {1} -s {2} "
"--p1_src_start_ip 10.10.10.1 "
"--p1_src_end_ip 10.10.10.254 "
"--p1_dst_start_ip 20.20.20.1 "
"--p2_src_start_ip 20.20.20.1 "
"--p2_src_end_ip 20.20.20.254 "
"--p2_dst_start_ip 10.10.10.1'".\
format(duration, rate, framesize), timeout=int(duration)+60)
elif traffic_type in ["3-node-IPv4"]:
(ret, stdout, stderr) = ssh.exec_command(
"sh -c '/tmp/openvpp-testing/resources/tools/t-rex-stateless.py "
"-d {0} -r {1} -s {2} "
"--p1_src_start_ip 10.10.10.2 "
"--p1_src_end_ip 10.10.10.254 "
"--p1_dst_start_ip 20.20.20.2 "
"--p2_src_start_ip 20.20.20.2 "
"--p2_src_end_ip 20.20.20.254 "
"--p2_dst_start_ip 10.10.10.2'".\
format(duration, rate, framesize),\
timeout=int(duration)+60)
else:
raise NotImplementedError('Unsupported traffic type')
else:
raise NotImplementedError("TG subtype not supported")
logger.trace(ret)
logger.trace(stdout)
logger.trace(stderr)
for line in stdout.splitlines():
pass
self._result = line
logger.info('TrafficGen result: {0}'.format(self._result))
self._loss = self._result.split(', ')[3].split('=')[1]
return self._result
def no_traffic_loss_occured(self):
"""Fail is loss occured in traffic run
:return: nothing
"""
if self._loss is None:
raise Exception('The traffic generation has not been issued')
if self._loss != '0':
raise Exception('Traffic loss occured: {0}'.format(self._loss))
|
