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# 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: interface name of first interface
:param interface2: interface name 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))
if int(ret) != 0:
logger.error('trex-cfg failed: {0}'.format(stdout + stderr))
raise RuntimeError('trex-cfg failed')
(ret, _, _) = 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))
if int(ret) != 0:
raise RuntimeError('t-rex-64 startup failed')
@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))
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