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#!/usr/bin/env python |
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# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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# contributor license agreements. See the NOTICE file distributed with |
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# this work for additional information regarding copyright ownership. |
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# The ASF licenses this file to You under the Apache License, Version 2.0 |
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# (the "License"); you may not use this file except in compliance with |
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# the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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""" |
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Tags: Load test, stress test. |
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A utility script that injects trigger instances into st2 system. |
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This tool is designed with stress/load testing in mind. Trigger |
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instances need appropriate rules to be setup so there is some |
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meaningful work. |
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""" |
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import os |
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import random |
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import eventlet |
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from oslo_config import cfg |
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import yaml |
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from st2common import config |
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from st2common.util.monkey_patch import monkey_patch |
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from st2common.util import date as date_utils |
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from st2common.transport.reactor import TriggerDispatcher |
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def do_register_cli_opts(opts, ignore_errors=False): |
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for opt in opts: |
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try: |
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cfg.CONF.register_cli_opt(opt) |
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except: |
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if not ignore_errors: |
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raise |
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def _inject_instances(trigger, rate_per_trigger, duration, payload={}): |
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start = date_utils.get_datetime_utc_now() |
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elapsed = 0.0 |
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count = 0 |
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dispatcher = TriggerDispatcher() |
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while elapsed < duration: |
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# print('Dispatching trigger %s at time %s', trigger, date_utils.get_datetime_utc_now()) |
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dispatcher.dispatch(trigger, payload) |
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delta = random.expovariate(rate_per_trigger) |
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eventlet.sleep(delta) |
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elapsed = (date_utils.get_datetime_utc_now() - start).seconds / 60.0 |
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count += 1 |
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print('%s: Emitted %d triggers in %d seconds' % (trigger, count, elapsed)) |
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def main(): |
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monkey_patch() |
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cli_opts = [ |
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cfg.IntOpt('rate', default=100, |
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help='Rate of trigger injection measured in instances in per sec.' + |
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' Assumes a default exponential distribution in time so arrival is poisson.'), |
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cfg.ListOpt('triggers', required=False, |
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help='List of triggers for which instances should be fired.' + |
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' Uniform distribution will be followed if there is more than one' + |
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'trigger.'), |
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cfg.StrOpt('schema_file', default=None, |
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help='Path to schema file defining trigger and payload.'), |
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cfg.IntOpt('duration', default=1, |
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help='Duration of stress test in minutes.') |
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] |
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do_register_cli_opts(cli_opts) |
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config.parse_args() |
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# Get config values |
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triggers = cfg.CONF.triggers |
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trigger_payload_schema = {} |
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if not triggers: |
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if (cfg.CONF.schema_file is None or cfg.CONF.schema_file == '' or |
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not os.path.exists(cfg.CONF.schema_file)): |
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print('Either "triggers" need to be provided or a schema file containing' + |
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' triggers should be provided.') |
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return |
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with open(cfg.CONF.schema_file) as fd: |
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trigger_payload_schema = yaml.safe_load(fd) |
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triggers = trigger_payload_schema.keys() |
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print('Triggers=%s' % triggers) |
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rate = cfg.CONF.rate |
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rate_per_trigger = int(rate / len(triggers)) |
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duration = cfg.CONF.duration |
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dispatcher_pool = eventlet.GreenPool(len(triggers)) |
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for trigger in triggers: |
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payload = trigger_payload_schema.get(trigger, {}) |
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dispatcher_pool.spawn(_inject_instances, trigger, rate_per_trigger, duration, |
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payload=payload) |
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eventlet.sleep(random.uniform(0, 1)) |
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dispatcher_pool.waitall() |
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if __name__ == '__main__': |
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main() |
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Plexxi /
st2
Objects as default values are only created once in Python and not on each invocation of the function. If the default object is modified, this modification is carried over to the next invocation of the method.