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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/vnf_type_crawler.py
"""A runner that runs a configurable number of times before it returns
"""
from __future__ import absolute_import
import logging
import multiprocessing
import time
import traceback
import os
from vnftest.common.exceptions import VnftestException
from vnftest.runners import base
LOG = logging.getLogger(__name__)
QUEUE_PUT_TIMEOUT = 10
def _worker_process(result_queue, cls, method_name, step_cfg,
context_cfg, input_params, aborted, output_queue):
sequence = 1
runner_cfg = step_cfg['runner']
interval = runner_cfg.get("interval", 1)
iterations = runner_cfg.get("iterations", 1)
run_step = runner_cfg.get("run_step", "setup,run,teardown")
delta = runner_cfg.get("delta", 2)
LOG.info("worker START, iterations %d times, class %s", iterations, cls)
runner_cfg['runner_id'] = os.getpid()
step = cls(step_cfg, context_cfg, input_params)
if "setup" in run_step:
step.setup()
method = getattr(step, method_name)
sla_action = None
if "sla" in step_cfg:
sla_action = step_cfg["sla"].get("action", "assert")
if "run" in run_step:
while True:
LOG.debug("runner=%(runner)s seq=%(sequence)s START",
{"runner": runner_cfg["runner_id"],
"sequence": sequence})
results = {}
errors = []
fatal_error = False
try:
output = method(results)
if output:
# 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(output, True, QUEUE_PUT_TIMEOUT)
except AssertionError as assertion:
LOG.exception("Assertion error: %s", assertion)
# SLA validation failed in step, determine what to do now
if sla_action == "assert":
errors.append(assertion)
fatal_error = True
elif sla_action == "monitor":
LOG.warning("SLA validation failed: %s", assertion.args)
errors.append(assertion.args)
elif sla_action == "rate-control":
try:
step_cfg['options']['rate']
except KeyError:
step_cfg.setdefault('options', {})
step_cfg['options']['rate'] = 100
step_cfg['options']['rate'] -= delta
sequence = 1
continue
except Exception:
errors.append(traceback.format_exc())
LOG.exception("")
LOG.info("Abort the task")
fatal_error = True
time.sleep(interval)
step_results = {
'timestamp': time.time(),
'sequence': sequence,
'data': results,
'errors': errors
}
result_queue.put(step_results, 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 \
(sequence > iterations or aborted.is_set()) or fatal_error:
LOG.info("worker END")
break
if "teardown" in run_step:
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", result_queue.qsize())
LOG.debug("output_queue.qsize() = %s", output_queue.qsize())
if fatal_error:
raise SystemExit(1)
class IterationRunner(base.Runner):
"""Run a step for a configurable number of times
If the step ends before the time has elapsed, it will be started again.
Parameters
iterations - amount of times the step will be run for
type: int
unit: na
default: 1
interval - time to wait between each step invocation
type: int
unit: seconds
default: 1 sec
"""
__execution_type__ = 'Iteration'
def _run_step(self, cls, method, step_cfg, context_cfg, input_params):
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, input_params, self.aborted, self.output_queue))
self.process.start()
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