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##############################################################################
# Copyright (c) 2015 Ericsson AB and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
import pkg_resources
import logging
import json
import yardstick.ssh as ssh
from yardstick.benchmark.scenarios import base
LOG = logging.getLogger(__name__)
LOG.setLevel(logging.DEBUG)
class Pktgen(base.Scenario):
"""Executes a pktgen benchmark between two hosts"""
__scenario_type__ = "Pktgen"
TARGET_SCRIPT = 'pktgen_benchmark.bash'
def __init__(self, context):
self.context = context
self.setup_done = False
def setup(self):
'''scenario setup'''
self.target_script = pkg_resources.resource_filename(
'yardstick.benchmark.scenarios.networking',
Pktgen.TARGET_SCRIPT)
user = self.context.get('user', 'ubuntu')
host = self.context.get('host', None)
target = self.context.get('target', None)
key_filename = self.context.get('key_filename', '~/.ssh/id_rsa')
LOG.debug("user:%s, target:%s", user, target)
self.server = ssh.SSH(user, target, key_filename=key_filename)
self.server.wait(timeout=600)
LOG.debug("user:%s, host:%s", user, host)
self.client = ssh.SSH(user, host, key_filename=key_filename)
self.client.wait(timeout=600)
# copy script to host
self.client.run("cat > ~/pktgen.sh",
stdin=open(self.target_script, "rb"))
self.setup_done = True
def _iptables_setup(self):
"""Setup iptables on server to monitor for received packets"""
cmd = "sudo iptables -F; " \
"sudo iptables -A INPUT -p udp --dport 1000:%s -j DROP" \
% (1000 + self.number_of_ports)
LOG.debug("Executing command: %s", cmd)
status, _, stderr = self.server.execute(cmd)
if status:
raise RuntimeError(stderr)
def _iptables_get_result(self):
"""Get packet statistics from server"""
cmd = "sudo iptables -L INPUT -vnx |" \
"awk '/dpts:1000:%s/ {{printf \"%%s\", $1}}'" \
% (1000 + self.number_of_ports)
LOG.debug("Executing command: %s", cmd)
status, stdout, stderr = self.server.execute(cmd)
if status:
raise RuntimeError(stderr)
return int(stdout)
def run(self, args):
"""execute the benchmark"""
if not self.setup_done:
self.setup()
ipaddr = args.get("ipaddr", '127.0.0.1')
options = args['options']
packetsize = options.get("packetsize", 60)
self.number_of_ports = options.get("number_of_ports", 10)
self._iptables_setup()
cmd = "sudo bash pktgen.sh %s %s %s" \
% (ipaddr, self.number_of_ports, packetsize)
LOG.debug("Executing command: %s", cmd)
status, stdout, stderr = self.client.execute(cmd)
if status:
raise RuntimeError(stderr)
data = json.loads(stdout)
data['packets_received'] = self._iptables_get_result()
if "sla" in args:
sent = data['packets_sent']
received = data['packets_received']
ppm = 1000000 * (sent - received) / sent
sla_max_ppm = int(args["sla"]["max_ppm"])
assert ppm <= sla_max_ppm, "ppm %d > sla_max_ppm %d" \
% (ppm, sla_max_ppm)
return data
def _test():
'''internal test function'''
key_filename = pkg_resources.resource_filename('yardstick.resources',
'files/yardstick_key')
ctx = {'host': '172.16.0.137',
'target': '172.16.0.138',
'user': 'ubuntu',
'key_filename': key_filename
}
logger = logging.getLogger('yardstick')
logger.setLevel(logging.DEBUG)
p = Pktgen(ctx)
options = {'packetsize': 120}
args = {'options': options,
'ipaddr': '192.168.111.31'}
result = p.run(args)
print result
if __name__ == '__main__':
_test()
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