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##############################################################################
# Copyright 2018 EuropeanSoftwareMarketingLtd.
# ===================================================================
# Licensed under the ApacheLicense, Version2.0 (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
#
# 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
##############################################################################
# vnftest comment: this is a modified copy of
# rally/rally/benchmark/runners/duration.py
"""A runner that runs a specific time before it returns
"""
from __future__ import absolute_import
import logging
import multiprocessing
import time
import traceback
import os
from vnftest.runners import base
LOG = logging.getLogger(__name__)
QUEUE_PUT_TIMEOUT = 10
def _worker_process(queue, cls, method_name, step_cfg,
context_cfg, aborted, output_queue):
sequence = 1
runner_cfg = step_cfg['runner']
interval = runner_cfg.get("interval", 1)
duration = runner_cfg.get("duration", 60)
LOG.info("Worker START, duration is %ds", duration)
LOG.debug("class is %s", cls)
runner_cfg['runner_id'] = os.getpid()
step = cls(step_cfg, context_cfg)
step.setup()
method = getattr(step, method_name)
sla_action = None
if "sla" in step_cfg:
sla_action = step_cfg["sla"].get("action", "assert")
start = time.time()
timeout = start + duration
while True:
LOG.debug("runner=%(runner)s seq=%(sequence)s START",
{"runner": runner_cfg["runner_id"], "sequence": sequence})
data = {}
errors = ""
try:
result = method(data)
except AssertionError as assertion:
# SLA validation failed in scenario, determine what to do now
if sla_action == "assert":
raise
elif sla_action == "monitor":
LOG.warning("SLA validation failed: %s", assertion.args)
errors = assertion.args
# catch all exceptions because with multiprocessing we can have un-picklable exception
# problems https://bugs.python.org/issue9400
except Exception:
errors = traceback.format_exc()
LOG.exception("")
else:
if result:
# add timeout for put so we don't block test
# if we do timeout we don't care about dropping individual KPIs
output_queue.put(result, True, QUEUE_PUT_TIMEOUT)
time.sleep(interval)
step_output = {
'timestamp': time.time(),
'sequence': sequence,
'data': data,
'errors': errors
}
queue.put(step_output, True, QUEUE_PUT_TIMEOUT)
LOG.debug("runner=%(runner)s seq=%(sequence)s END",
{"runner": runner_cfg["runner_id"], "sequence": sequence})
sequence += 1
if (errors and sla_action is None) or time.time() > timeout or aborted.is_set():
LOG.info("Worker END")
break
try:
step.teardown()
except Exception:
# catch any exception in teardown and convert to simple exception
# never pass exceptions back to multiprocessing, because some exceptions can
# be unpicklable
# https://bugs.python.org/issue9400
LOG.exception("")
raise SystemExit(1)
LOG.debug("queue.qsize() = %s", queue.qsize())
LOG.debug("output_queue.qsize() = %s", output_queue.qsize())
class DurationRunner(base.Runner):
"""Run a scenario for a certain amount of time
If the scenario ends before the time has elapsed, it will be started again.
Parameters
duration - amount of time the scenario will be run for
type: int
unit: seconds
default: 1 sec
interval - time to wait between each scenario invocation
type: int
unit: seconds
default: 1 sec
"""
__execution_type__ = 'Duration'
def _run_step(self, cls, method, step_cfg, context_cfg):
name = "{}-{}-{}".format(self.__execution_type__, step_cfg.get("type"), os.getpid())
self.process = multiprocessing.Process(
name=name,
target=_worker_process,
args=(self.result_queue, cls, method, step_cfg,
context_cfg, self.aborted, self.output_queue))
self.process.start()
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