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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/sequence.py
"""A runner that every run changes a specified input value to the step.
The input value in the sequence is specified in a list in the input file.
"""
from __future__ import absolute_import
import logging
import multiprocessing
import time
import traceback
import os
from vnftest.runners import base
LOG = logging.getLogger(__name__)
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)
arg_name = runner_cfg.get('step_option_name')
sequence_values = runner_cfg.get('sequence')
if 'options' not in step_cfg:
step_cfg['options'] = {}
options = step_cfg['options']
runner_cfg['runner_id'] = os.getpid()
LOG.info("worker START, sequence_values(%s, %s), class %s",
arg_name, sequence_values, cls)
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")
for value in sequence_values:
options[arg_name] = value
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 step, 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
except Exception as e:
errors = traceback.format_exc()
LOG.exception(e)
else:
if result:
output_queue.put(result)
time.sleep(interval)
step_output = {
'timestamp': time.time(),
'sequence': sequence,
'data': data,
'errors': errors
}
queue.put(step_output)
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 aborted.is_set():
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.info("worker END")
LOG.debug("queue.qsize() = %s", queue.qsize())
LOG.debug("output_queue.qsize() = %s", output_queue.qsize())
class SequenceRunner(base.Runner):
"""Run a step by changing an input value defined in a list
Parameters
interval - time to wait between each step invocation
type: int
unit: seconds
default: 1 sec
step_option_name - name of the option that is increased each invocation
type: string
unit: na
default: none
sequence - list of values which are executed in their respective steps
type: [int]
unit: na
default: none
"""
__execution_type__ = 'Sequence'
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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