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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.
""" Add generic L3 forwarder implementation based on sample_vnf.py"""
from __future__ import absolute_import
import logging
import time
import itertools
import re
from netaddr import IPRange
from six.moves import zip
from yardstick.benchmark.contexts.base import Context
from yardstick.network_services.vnf_generic.vnf.sample_vnf import SampleVNF, \
DpdkVnfSetupEnvHelper
LOG = logging.getLogger(__name__)
class RouterVNF(SampleVNF):
WAIT_TIME = 1
def __init__(self, name, vnfd, setup_env_helper_type=None, resource_helper_type=None):
if setup_env_helper_type is None:
setup_env_helper_type = DpdkVnfSetupEnvHelper
# For heat test cases
vnfd['mgmt-interface'].pop("pkey", "")
vnfd['mgmt-interface']['password'] = 'password'
super(RouterVNF, self).__init__(name, vnfd, setup_env_helper_type, resource_helper_type)
def instantiate(self, scenario_cfg, context_cfg):
self.scenario_helper.scenario_cfg = scenario_cfg
self.context_cfg = context_cfg
self.configure_routes(self.name, scenario_cfg, context_cfg)
def wait_for_instantiate(self):
time.sleep(self.WAIT_TIME)
def _run(self):
# we can't share ssh paramiko objects to force new connection
self.ssh_helper.drop_connection()
def terminate(self):
self._tear_down()
self.resource_helper.stop_collect()
def scale(self, flavor=""):
pass
@staticmethod
def row_with_header(header, data):
"""Returns dictionary per row of values for 'ip show stats'.
Args:
header(str): output header
data(str): output data
Returns:
dict: dictionary per row of values for 'ip show stats'
"""
prefix, columns = header.strip().split(':')
column_names = ["{0}:{1}".format(prefix, h) for h in columns.split()]
return dict(list(zip(column_names, data.strip().split())))
RX_TX_RE = re.compile(r"\s+[RT]X[^:]*:")
@classmethod
def get_stats(cls, stdout):
"""Returns list of IP statistics.
Args:
stdout(str): command output
Returns:
dict: list of IP statistics
"""
input_lines = stdout.splitlines()
table = {}
for n, row in enumerate(input_lines):
if cls.RX_TX_RE.match(row):
# use pairs of rows, header and data
table.update(cls.row_with_header(*input_lines[n:n + 2]))
return table
def collect_kpi(self):
# Implement stats collection
ip_link_stats = '/sbin/ip -s link'
stdout = self.ssh_helper.execute(ip_link_stats)[1]
link_stats = self.get_stats(stdout)
# get RX/TX from link_stats and assign to results
physical_node = Context.get_physical_node_from_server(
self.scenario_helper.nodes[self.name])
result = {
"physical_node": physical_node,
"packets_in": 0,
"packets_dropped": 0,
"packets_fwd": 0,
"link_stats": link_stats
}
LOG.debug("%s collect KPIs %s", "RouterVNF", result)
return result
INTERFACE_WAIT = 2
def configure_routes(self, node_name, scenario_cfg, context_cfg):
# Configure IP of dataplane ports and add static ARP entries
#
# This function should be modified to configure a 3rd party/commercial VNF.
# The current implementation works on a Linux based VNF with "ip" command.
#
# Flow contains:
# {'src_ip': ['152.16.100.26-152.16.100.27'],
# 'dst_ip': ['152.16.40.26-152.16.40.27'], 'count': 2}
ifaces = []
dst_macs = []
ip_cmd_replace = '/sbin/ip addr replace %s/24 dev %s'
ip_cmd_up = '/sbin/ip link set %s up'
ip_cmd_flush = '/sbin/ip address flush dev %s'
# Get VNF IPs from test case file
for value in context_cfg['nodes'][node_name]['interfaces'].values():
dst_macs.append(value['dst_mac'])
# Get the network interface name using local_mac
iname = self.ssh_helper.execute("/sbin/ip a |grep -B 1 %s | head -n 1"
% (value['local_mac']))
iname = iname[1].split(":")[1].strip()
ifaces.append(iname)
self.ssh_helper.execute(ip_cmd_flush % iname)
# Get the local_ip from context_cfg and assign to the data ports
self.ssh_helper.execute(ip_cmd_replace % (str(value['local_ip']),
iname))
# Enable interface
self.ssh_helper.execute(ip_cmd_up % iname)
time.sleep(self.INTERFACE_WAIT)
# Configure static ARP entries for each IP
# using SSH or REST API calls
try:
src_ips = scenario_cfg['options']['flow']['src_ip']
dst_ips = scenario_cfg['options']['flow']['dst_ip']
except KeyError:
raise KeyError("Missing flow definition in scenario section" +
" of the task definition file")
# Multiport
ip_ranges = []
for src, dst in zip(src_ips, dst_ips):
range1 = itertools.cycle(iter(src.split('-')))
range2 = itertools.cycle(iter(dst.split('-')))
range1 = IPRange(next(range1), next(range1))
range2 = IPRange(next(range2), next(range2))
ip_ranges.append(range1)
ip_ranges.append(range2)
ip_cmd = '/sbin/ip neigh add %s lladdr %s dev %s nud perm'
for idx, iface in enumerate(ifaces):
for addr in ip_ranges[idx]:
self.ssh_helper.execute(ip_cmd % (addr, dst_macs[idx], iface))
arp_status = self.ssh_helper.execute("arp -a -n")
LOG.debug('arp %s', arp_status)
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