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# Copyright (c) 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.
import errno
import logging
import datetime
import time
from yardstick.common.process import check_if_process_failed
from yardstick.network_services.vnf_generic.vnf.prox_helpers import ProxDpdkVnfSetupEnvHelper
from yardstick.network_services.vnf_generic.vnf.prox_helpers import ProxResourceHelper
from yardstick.network_services.vnf_generic.vnf.sample_vnf import SampleVNF
from yardstick.network_services import constants
LOG = logging.getLogger(__name__)
class ProxApproxVnf(SampleVNF):
APP_NAME = 'PROX'
APP_WORD = 'PROX'
PROX_MODE = "Workload"
VNF_PROMPT = "PROX started"
LUA_PARAMETER_NAME = "sut"
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 = ProxDpdkVnfSetupEnvHelper
if resource_helper_type is None:
resource_helper_type = ProxResourceHelper
self.prev_packets_in = 0
self.prev_packets_sent = 0
self.prev_time = time.time()
super(ProxApproxVnf, self).__init__(name, vnfd, setup_env_helper_type,
resource_helper_type)
def _vnf_up_post(self):
self.resource_helper.up_post()
def vnf_execute(self, cmd, *args, **kwargs):
# try to execute with socket commands
# ignore socket errors, e.g. when using force_quit
ignore_errors = kwargs.pop("_ignore_errors", False)
try:
return self.resource_helper.execute(cmd, *args, **kwargs)
except OSError as e:
if e.errno in {errno.EPIPE, errno.ESHUTDOWN, errno.ECONNRESET}:
if ignore_errors:
LOG.debug("ignoring vnf_execute exception %s for command %s", e, cmd)
else:
raise
else:
raise
def collect_kpi(self):
# we can't get KPIs if the VNF is down
check_if_process_failed(self._vnf_process)
if self.resource_helper is None:
result = {
"packets_in": 0,
"packets_dropped": 0,
"packets_fwd": 0,
"collect_stats": {"core": {}},
}
return result
# use all_ports so we only use ports matched in topology
port_count = len(self.vnfd_helper.port_pairs.all_ports)
if port_count not in {1, 2, 4}:
raise RuntimeError("Failed ..Invalid no of ports .. "
"1, 2 or 4 ports only supported at this time")
self.port_stats = self.vnf_execute('port_stats', range(port_count))
curr_time = time.time()
try:
rx_total = self.port_stats[6]
tx_total = self.port_stats[7]
except IndexError:
LOG.debug("port_stats parse fail ")
# return empty dict so we don't mess up existing KPIs
return {}
result = {
"packets_in": rx_total,
"packets_dropped": max((tx_total - rx_total), 0),
"packets_fwd": tx_total,
# we share ProxResourceHelper with TG, but we want to collect
# collectd KPIs here and not TG KPIs, so use a different method name
"collect_stats": self.resource_helper.collect_collectd_kpi(),
}
curr_packets_in = int((rx_total - self.prev_packets_in) / (curr_time - self.prev_time))
curr_packets_fwd = int((tx_total - self.prev_packets_sent) / (curr_time - self.prev_time))
result["curr_packets_in"] = curr_packets_in
result["curr_packets_fwd"] = curr_packets_fwd
self.prev_packets_in = rx_total
self.prev_packets_sent = tx_total
self.prev_time = curr_time
LOG.debug("%s collect KPIs %s %s", self.APP_NAME, datetime.datetime.now(), result)
return result
def _tear_down(self):
# this should be standardized for all VNFs or removed
self.setup_helper.tear_down()
def terminate(self):
# stop collectd first or we get pika errors?
self.resource_helper.stop_collect()
# try to quit with socket commands
# pkill is not matching, debug with pgrep
self.ssh_helper.execute("sudo pgrep -lax %s" % self.setup_helper.APP_NAME)
self.ssh_helper.execute("sudo ps aux | grep -i %s" % self.setup_helper.APP_NAME)
if self._vnf_process.is_alive():
self.vnf_execute("stop_all")
self.vnf_execute("quit")
# hopefully quit succeeds and socket closes, so ignore force_quit socket errors
self.vnf_execute("force_quit", _ignore_errors=True)
self.setup_helper.kill_vnf()
self._tear_down()
if self._vnf_process is not None:
LOG.debug("joining before terminate %s", self._vnf_process.name)
self._vnf_process.join(constants.PROCESS_JOIN_TIMEOUT)
self._vnf_process.terminate()
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