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# Copyright (c) 2016-2017 Intel Corporation
#
# 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.
""" PING acts as traffic generation and vnf definitions based on IETS Spec """
from __future__ import absolute_import
from __future__ import print_function
import logging
import multiprocessing
import re
import time
import os
from yardstick import ssh
from yardstick.network_services.vnf_generic.vnf.base import GenericTrafficGen
from yardstick.network_services.utils import provision_tool
LOG = logging.getLogger(__name__)
class PingParser(object):
""" Class providing file-like API for talking with SSH connection """
def __init__(self, q_out):
self.queue = q_out
self.closed = False
def write(self, chunk):
""" 64 bytes from 10.102.22.93: icmp_seq=1 ttl=64 time=0.296 ms """
match = re.search(r"icmp_seq=(\d+).*time=([0-9.]+)", chunk)
LOG.debug("Parser called on %s", chunk)
if match:
# IMPORTANT: in order for the data to be properly taken
# in by InfluxDB, it needs to be converted to numeric types
self.queue.put({"packets_received": float(match.group(1)),
"rtt": float(match.group(2))})
def close(self):
''' close the ssh connection '''
pass
def clear(self):
''' clear queue till Empty '''
while self.queue.qsize() > 0:
self.queue.get()
class PingTrafficGen(GenericTrafficGen):
"""
This traffic generator can ping a single IP with pingsize
and target given in traffic profile
"""
def __init__(self, vnfd):
super(PingTrafficGen, self).__init__(vnfd)
self._result = {}
self._parser = None
self._queue = None
self._traffic_process = None
mgmt_interface = vnfd["mgmt-interface"]
self.connection = ssh.SSH.from_node(mgmt_interface)
self.connection.wait()
def _bind_device_kernel(self, connection):
dpdk_nic_bind = \
provision_tool(self.connection,
os.path.join(self.bin_path, "dpdk_nic_bind.py"))
drivers = {intf["virtual-interface"]["vpci"]:
intf["virtual-interface"]["driver"]
for intf in self.vnfd["vdu"][0]["external-interface"]}
commands = \
['"{0}" --force -b "{1}" "{2}"'.format(dpdk_nic_bind, value, key)
for key, value in drivers.items()]
for command in commands:
connection.execute(command)
for index, out in enumerate(self.vnfd["vdu"][0]["external-interface"]):
vpci = out["virtual-interface"]["vpci"]
net = "find /sys/class/net -lname '*{}*' -printf '%f'".format(vpci)
out = connection.execute(net)[1]
ifname = out.split('/')[-1].strip('\n')
self.vnfd["vdu"][0]["external-interface"][index][
"virtual-interface"]["local_iface_name"] = ifname
def scale(self, flavor=""):
''' scale vnfbased on flavor input '''
super(PingTrafficGen, self).scale(flavor)
def instantiate(self, scenario_cfg, context_cfg):
self._result = {"packets_received": 0, "rtt": 0}
self._bind_device_kernel(self.connection)
def run_traffic(self, traffic_profile):
self._queue = multiprocessing.Queue()
self._parser = PingParser(self._queue)
self._traffic_process = \
multiprocessing.Process(target=self._traffic_runner,
args=(traffic_profile, self._parser))
self._traffic_process.start()
# Wait for traffic process to start
time.sleep(4)
return self._traffic_process.is_alive()
def listen_traffic(self, traffic_profile):
""" Not needed for ping
:param traffic_profile:
:return:
"""
pass
def _traffic_runner(self, traffic_profile, filewrapper):
mgmt_interface = self.vnfd["mgmt-interface"]
self.connection = ssh.SSH.from_node(mgmt_interface)
self.connection.wait()
external_interface = self.vnfd["vdu"][0]["external-interface"]
virtual_interface = external_interface[0]["virtual-interface"]
target_ip = virtual_interface["dst_ip"].split('/')[0]
local_ip = virtual_interface["local_ip"].split('/')[0]
local_if_name = \
virtual_interface["local_iface_name"].split('/')[0]
packet_size = traffic_profile.params["traffic_profile"]["frame_size"]
run_cmd = []
run_cmd.append("ip addr flush %s" % local_if_name)
run_cmd.append("ip addr add %s/24 dev %s" % (local_ip, local_if_name))
run_cmd.append("ip link set %s up" % local_if_name)
for cmd in run_cmd:
self.connection.execute(cmd)
ping_cmd = ("ping -s %s %s" % (packet_size, target_ip))
self.connection.run(ping_cmd, stdout=filewrapper,
keep_stdin_open=True, pty=True)
def collect_kpi(self):
if not self._queue.empty():
kpi = self._queue.get()
self._result.update(kpi)
return self._result
def terminate(self):
if self._traffic_process is not None:
self._traffic_process.terminate()
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