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Diffstat (limited to 'vnftest/onap/runners/base.py')
| -rwxr-xr-x | vnftest/onap/runners/base.py | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/vnftest/onap/runners/base.py b/vnftest/onap/runners/base.py new file mode 100755 index 0000000..5170bbe --- /dev/null +++ b/vnftest/onap/runners/base.py @@ -0,0 +1,250 @@ +############################################################################## +# 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/base.py + +from __future__ import absolute_import +import logging +import multiprocessing +import subprocess +import time +import traceback +import importlib +from Queue import Empty + +import vnftest.common.utils as utils +from vnftest.onap.steps import base as base_step +from vnftest.onap.steps.onap_api_call import OnapApiCall + +log = logging.getLogger(__name__) + + +def _execute_shell_command(command): + """execute shell script with error handling""" + exitcode = 0 + try: + output = subprocess.check_output(command, shell=True) + except Exception: + exitcode = -1 + output = traceback.format_exc() + log.error("exec command '%s' error:\n ", command) + log.error(traceback.format_exc()) + + return exitcode, output + + +def _single_action(seconds, command, queue): + """entrypoint for the single action process""" + log.debug("single action, fires after %d seconds (from now)", seconds) + time.sleep(seconds) + log.debug("single action: executing command: '%s'", command) + ret_code, data = _execute_shell_command(command) + if ret_code < 0: + log.error("single action error! command:%s", command) + queue.put({'single-action-data': data}) + return + log.debug("single action data: \n%s", data) + queue.put({'single-action-data': data}) + + +def _periodic_action(interval, command, queue): + """entrypoint for the periodic action process""" + log.debug("periodic action, fires every: %d seconds", interval) + time_spent = 0 + while True: + time.sleep(interval) + time_spent += interval + log.debug("periodic action, executing command: '%s'", command) + ret_code, data = _execute_shell_command(command) + if ret_code < 0: + log.error("periodic action error! command:%s", command) + queue.put({'periodic-action-data': data}) + break + log.debug("periodic action data: \n%s", data) + queue.put({'periodic-action-data': data}) + + +class Runner(object): + runners = [] + + @staticmethod + def get_cls(runner_type): + """return class of specified type""" + for runner in utils.itersubclasses(Runner): + if runner_type == runner.__execution_type__: + return runner + raise RuntimeError("No such runner_type %s" % runner_type) + + @staticmethod + def get_types(): + """return a list of known runner type (class) names""" + types = [] + for runner in utils.itersubclasses(Runner): + types.append(runner) + return types + + @staticmethod + def get(runner_cfg): + """Returns instance of a step runner for execution type. + """ + return Runner.get_cls(runner_cfg["type"])(runner_cfg) + + @staticmethod + def release(runner): + """Release the runner""" + if runner in Runner.runners: + Runner.runners.remove(runner) + + @staticmethod + def terminate(runner): + """Terminate the runner""" + if runner.process and runner.process.is_alive(): + runner.process.terminate() + + @staticmethod + def terminate_all(): + """Terminate all runners (subprocesses)""" + log.debug("Terminating all runners", exc_info=True) + + # release dumper process as some errors before any runner is created + if not Runner.runners: + return + + for runner in Runner.runners: + log.debug("Terminating runner: %s", runner) + if runner.process: + runner.process.terminate() + runner.process.join() + if runner.periodic_action_process: + log.debug("Terminating periodic action process") + runner.periodic_action_process.terminate() + runner.periodic_action_process = None + Runner.release(runner) + + def __init__(self, config): + self.config = config + self.periodic_action_process = None + self.output_queue = multiprocessing.Queue() + self.result_queue = multiprocessing.Queue() + self.process = None + self.aborted = multiprocessing.Event() + Runner.runners.append(self) + + def run_post_stop_action(self): + """run a potentially configured post-stop action""" + if "post-stop-action" in self.config: + command = self.config["post-stop-action"]["command"] + log.debug("post stop action: command: '%s'", command) + ret_code, data = _execute_shell_command(command) + if ret_code < 0: + log.error("post action error! command:%s", command) + self.result_queue.put({'post-stop-action-data': data}) + return + log.debug("post-stop data: \n%s", data) + self.result_queue.put({'post-stop-action-data': data}) + + def _run_step(self, cls, method_name, step_cfg, context_cfg): + raise NotImplementedError + + def run(self, step_cfg, context_cfg): + step_type = step_cfg["type"] + class_name = base_step.Step.get(step_type) + path_split = class_name.split(".") + module_path = ".".join(path_split[:-1]) + module = importlib.import_module(module_path) + cls = getattr(module, path_split[-1]) + + self.config['object'] = class_name + self.aborted.clear() + + # run a potentially configured pre-start action + if "pre-start-action" in self.config: + command = self.config["pre-start-action"]["command"] + log.debug("pre start action: command: '%s'", command) + ret_code, data = _execute_shell_command(command) + if ret_code < 0: + log.error("pre-start action error! command:%s", command) + self.result_queue.put({'pre-start-action-data': data}) + return + log.debug("pre-start data: \n%s", data) + self.result_queue.put({'pre-start-action-data': data}) + + if "single-shot-action" in self.config: + single_action_process = multiprocessing.Process( + target=_single_action, + name="single-shot-action", + args=(self.config["single-shot-action"]["after"], + self.config["single-shot-action"]["command"], + self.result_queue)) + single_action_process.start() + + if "periodic-action" in self.config: + self.periodic_action_process = multiprocessing.Process( + target=_periodic_action, + name="periodic-action", + args=(self.config["periodic-action"]["interval"], + self.config["periodic-action"]["command"], + self.result_queue)) + self.periodic_action_process.start() + + self._run_step(cls, "run", step_cfg, context_cfg) + + def abort(self): + """Abort the execution of a step""" + self.aborted.set() + + QUEUE_JOIN_INTERVAL = 5 + + def poll(self, timeout=QUEUE_JOIN_INTERVAL): + self.process.join(timeout) + return self.process.exitcode + + def join(self, outputs, result, interval=QUEUE_JOIN_INTERVAL): + while self.process.exitcode is None: + # drain the queue while we are running otherwise we won't terminate + outputs.update(self.get_output()) + result.extend(self.get_result()) + self.process.join(interval) + # drain after the process has exited + outputs.update(self.get_output()) + result.extend(self.get_result()) + + self.process.terminate() + if self.periodic_action_process: + self.periodic_action_process.join(1) + self.periodic_action_process.terminate() + self.periodic_action_process = None + + self.run_post_stop_action() + return self.process.exitcode + + def get_output(self): + result = {} + while not self.output_queue.empty(): + log.debug("output_queue size %s", self.output_queue.qsize()) + try: + result.update(self.output_queue.get(True, 1)) + except Empty: + pass + return result + + def get_result(self): + result = [] + while not self.result_queue.empty(): + log.debug("result_queue size %s", self.result_queue.qsize()) + try: + result.append(self.result_queue.get(True, 1)) + except Empty: + pass + return result |