openstack
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oslo.messaging
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oslo.messaging/tools/simulator.py

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# Licensed under the Apache License, Version 2.0 (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
#
# Unless required by applicable law or agreed to in writing, 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.
import eventlet
eventlet.monkey_patch()
import argparse
import bisect
import collections
import functools
import itertools
import json
import logging
import os
import random
import signal
import six
import string
import sys
import threading
import time
import yaml
from oslo_config import cfg
import oslo_messaging as messaging
from oslo_messaging import notify # noqa
from oslo_messaging import rpc # noqa
from oslo_utils import timeutils
LOG = logging.getLogger()
RANDOM_GENERATOR = None
CURRENT_PID = None
CLIENTS = []
MESSAGES = []
IS_RUNNING = True
SERVERS = []
USAGE = """ Usage: ./simulator.py [-h] [--url URL] [-d DEBUG]\
{notify-server,notify-client,rpc-server,rpc-client} ...
Usage example:
python tools/simulator.py\
--url rabbit://stackrabbit:secretrabbit@localhost/ rpc-server
python tools/simulator.py\
--url rabbit://stackrabbit:secretrabbit@localhost/ rpc-client\
--exit-wait 15000 -p 64 -m 64"""
MESSAGES_LIMIT = 1000
DISTRIBUTION_BUCKET_SIZE = 500
def init_random_generator():
data = []
with open('./messages_length.yaml') as m_file:
content = yaml.safe_load(m_file)
data += [int(n) for n in content[
'test_data']['string_lengths'].split(', ')]
ranges = collections.defaultdict(int)
for msg_length in data:
range_start = ((msg_length // DISTRIBUTION_BUCKET_SIZE) *
DISTRIBUTION_BUCKET_SIZE + 1)
ranges[range_start] += 1
ranges_start = sorted(ranges.keys())
total_count = len(data)
accumulated_distribution = []
running_total = 0
for range_start in ranges_start:
norm = float(ranges[range_start]) / total_count
running_total += norm
accumulated_distribution.append(running_total)
def weighted_random_choice():
r = random.random() * running_total
start = ranges_start[bisect.bisect_right(accumulated_distribution, r)]
return random.randrange(start, start + DISTRIBUTION_BUCKET_SIZE)
return weighted_random_choice
class LoggingNoParsingFilter(logging.Filter):
def filter(self, record):
msg = record.getMessage()
for i in ['received {', 'MSG_ID is ']:
if i in msg:
return False
return True
Message = collections.namedtuple(
'Message', ['seq', 'cargo', 'client_ts', 'server_ts', 'return_ts'])
def make_message(seq, cargo, client_ts=0, server_ts=0, return_ts=0):
return Message(seq, cargo, client_ts, server_ts, return_ts)
def update_message(message, **kwargs):
return Message(*message)._replace(**kwargs)
class MessageStatsCollector(object):
def __init__(self, label):
self.label = label
self.buffer = [] # buffer to store messages during report interval
self.series = [] # stats for every report interval
threading.Timer(1.0, self.monitor).start() # schedule in a second
def monitor(self):
global IS_RUNNING
if IS_RUNNING:
threading.Timer(1.0, self.monitor).start()
now = time.time()
count = len(self.buffer)
size = 0
min_latency = sys.maxsize
max_latency = 0
sum_latencies = 0
for i in range(count):
p = self.buffer[i]
size += len(p.cargo)
latency = None
if p.return_ts:
latency = p.return_ts - p.client_ts # round-trip
elif p.server_ts:
latency = p.server_ts - p.client_ts # client -> server
if latency:
sum_latencies += latency
min_latency = min(min_latency, latency)
max_latency = max(max_latency, latency)
del self.buffer[:count] # trim processed items
seq = len(self.series)
stats = dict(seq=seq, timestamp=now, count=count, size=size)
msg = ('%-14s: seq: %-4d count: %-6d bytes: %-10d' %
(self.label, seq, count, size))
if sum_latencies:
latency = sum_latencies / count
stats.update(dict(latency=latency,
min_latency=min_latency,
max_latency=max_latency))
msg += (' latency: %-9.3f min: %-9.3f max: %-9.3f' %
(latency, min_latency, max_latency))
self.series.append(stats)
LOG.info(msg)
def push(self, parsed_message):
self.buffer.append(parsed_message)
def get_series(self):
return self.series
@staticmethod
def calc_stats(label, *collectors):
count = 0
size = 0
min_latency = sys.maxsize
max_latency = 0
sum_latencies = 0
start = sys.maxsize
end = 0
for point in itertools.chain(*(c.get_series() for c in collectors)):
count += point['count']
size += point['size']
start = min(start, point['timestamp'])
end = max(end, point['timestamp'])
if 'latency' in point:
sum_latencies += point['latency'] * point['count']
min_latency = min(min_latency, point['min_latency'])
max_latency = max(max_latency, point['max_latency'])
# start is the timestamp of the earliest block, which inclides samples
# for the prior second
start -= 1
duration = end - start if count else 0
stats = dict(count=count, size=size, duration=duration, count_p_s=0,
size_p_s=0)
if duration:
stats.update(dict(start=start, end=end,
count_p_s=count / duration,
size_p_s=size / duration))
msg = ('%s: duration: %.2f count: %d (%.1f msg/sec) '
'bytes: %d (%.0f bps)' %
(label, duration, count, stats['count_p_s'],
size, stats['size_p_s']))
if sum_latencies:
latency = sum_latencies / count
stats.update(dict(latency=latency,
min_latency=min_latency,
max_latency=max_latency))
msg += (' latency: %.3f min: %.3f max: %.3f' %
(latency, min_latency, max_latency))
LOG.info(msg)
return stats
class NotifyEndpoint(object):
def __init__(self, wait_before_answer, requeue):
self.wait_before_answer = wait_before_answer
self.requeue = requeue
self.received_messages = MessageStatsCollector('server')
self.cache = set()
def info(self, ctxt, publisher_id, event_type, payload, metadata):
LOG.debug("%s %s %s %s", ctxt, publisher_id, event_type, payload)
server_ts = time.time()
message = update_message(payload, server_ts=server_ts)
self.received_messages.push(message)
if self.requeue and message.seq not in self.cache:
self.cache.add(message.seq)
if self.wait_before_answer > 0:
time.sleep(self.wait_before_answer)
return messaging.NotificationResult.REQUEUE
return messaging.NotificationResult.HANDLED
def notify_server(transport, topic, wait_before_answer, duration, requeue):
endpoints = [NotifyEndpoint(wait_before_answer, requeue)]
target = messaging.Target(topic=topic)
server = notify.get_notification_listener(transport, [target],
endpoints, executor='eventlet')
run_server(server, duration=duration)
return endpoints[0]
class BatchNotifyEndpoint(object):
def __init__(self, wait_before_answer, requeue):
self.wait_before_answer = wait_before_answer
self.requeue = requeue
self.received_messages = MessageStatsCollector('server')
self.cache = set()
def info(self, batch):
LOG.debug('msg rcv')
LOG.debug("%s", batch)
server_ts = time.time()
for item in batch:
message = update_message(item['payload'], server_ts=server_ts)
self.received_messages.push(message)
return messaging.NotificationResult.HANDLED
def batch_notify_server(transport, topic, wait_before_answer, duration,
requeue):
endpoints = [BatchNotifyEndpoint(wait_before_answer, requeue)]
target = messaging.Target(topic=topic)
server = notify.get_batch_notification_listener(
transport, [target],
endpoints, executor='eventlet',
batch_size=1000, batch_timeout=5)
run_server(server, duration=duration)
return endpoints[0]
class RpcEndpoint(object):
def __init__(self, wait_before_answer):
self.wait_before_answer = wait_before_answer
self.received_messages = MessageStatsCollector('server')
def info(self, ctxt, message):
server_ts = time.time()
LOG.debug("######## RCV: %s", message)
reply = update_message(message, server_ts=server_ts)
self.received_messages.push(reply)
if self.wait_before_answer > 0:
time.sleep(self.wait_before_answer)
return reply
class Client(object):
def __init__(self, client_id, client, method, has_result,
wait_after_msg):
self.client_id = client_id
self.client = client
self.method = method
self.wait_after_msg = wait_after_msg
self.seq = 0
self.messages_count = len(MESSAGES)
# Start sending the messages from a random position to avoid
# memory re-usage and generate more realistic load on the library
# and a message transport
self.position = random.randint(0, self.messages_count - 1)
self.sent_messages = MessageStatsCollector('client-%s' % client_id)
self.errors = MessageStatsCollector('error-%s' % client_id)
if has_result:
self.round_trip_messages = MessageStatsCollector(
'round-trip-%s' % client_id)
def send_msg(self):
msg = make_message(self.seq, MESSAGES[self.position], time.time())
self.sent_messages.push(msg)
res = None
try:
res = self.method(self.client, msg)
except Exception:
self.errors.push(msg)
else:
LOG.debug("SENT: %s", msg)
if res:
return_ts = time.time()
res = update_message(res, return_ts=return_ts)
self.round_trip_messages.push(res)
self.seq += 1
self.position = (self.position + 1) % self.messages_count
if self.wait_after_msg > 0:
time.sleep(self.wait_after_msg)
class RPCClient(Client):
def __init__(self, client_id, transport, target, timeout, is_cast,
wait_after_msg):
client = rpc.RPCClient(transport, target).prepare(timeout=timeout)
method = _rpc_cast if is_cast else _rpc_call
super(RPCClient, self).__init__(client_id, client, method,
not is_cast, wait_after_msg)
class NotifyClient(Client):
def __init__(self, client_id, transport, topic, wait_after_msg):
client = notify.Notifier(transport, driver='messaging', topic=topic)
client = client.prepare(publisher_id='publisher-%d' % client_id)
method = _notify
super(NotifyClient, self).__init__(client_id, client, method,
False, wait_after_msg)
def generate_messages(messages_count):
# Limit the messages amount. Clients will reiterate the array again
# if an amount of messages to be sent is bigger than MESSAGES_LIMIT
if messages_count > MESSAGES_LIMIT:
messages_count = MESSAGES_LIMIT
LOG.info("Generating %d random messages", messages_count)
for i in range(messages_count):
length = RANDOM_GENERATOR()
msg = ''.join(random.choice(
string.ascii_lowercase) for x in range(length))
MESSAGES.append(msg)
LOG.info("Messages has been prepared")
def run_server(server, duration=None):
global IS_RUNNING
SERVERS.append(server)
server.start()
if duration:
with timeutils.StopWatch(duration) as stop_watch:
while not stop_watch.expired() and IS_RUNNING:
time.sleep(1)
server.stop()
IS_RUNNING = False
server.wait()
LOG.info('The server is terminating')
time.sleep(1) # wait for stats collector to process the last second
def rpc_server(transport, target, wait_before_answer, executor, duration):
endpoints = [RpcEndpoint(wait_before_answer)]
server = rpc.get_rpc_server(transport, target, endpoints,
executor=executor)
LOG.debug("starting RPC server for target %s", target)
run_server(server, duration=duration)
return server.dispatcher.endpoints[0]
def spawn_rpc_clients(threads, transport, targets, wait_after_msg, timeout,
is_cast, messages_count, duration):
p = eventlet.GreenPool(size=threads)
targets = itertools.cycle(targets)
for i in range(0, threads):
target = next(targets)
LOG.debug("starting RPC client for target %s", target)
client_builder = functools.partial(RPCClient, i, transport, target,
timeout, is_cast, wait_after_msg)
p.spawn_n(send_messages, i, client_builder, messages_count, duration)
p.waitall()
def spawn_notify_clients(threads, topic, transport, message_count,
wait_after_msg, timeout, duration):
p = eventlet.GreenPool(size=threads)
for i in range(0, threads):
client_builder = functools.partial(NotifyClient, i, transport, topic,
wait_after_msg)
p.spawn_n(send_messages, i, client_builder, message_count, duration)
p.waitall()
def send_messages(client_id, client_builder, messages_count, duration):
global IS_RUNNING
client = client_builder()
CLIENTS.append(client)
if duration:
with timeutils.StopWatch(duration) as stop_watch:
while not stop_watch.expired() and IS_RUNNING:
client.send_msg()
eventlet.sleep()
IS_RUNNING = False
else:
LOG.debug("Sending %d messages using client %d",
messages_count, client_id)
for _ in six.moves.range(0, messages_count):
client.send_msg()
eventlet.sleep()
if not IS_RUNNING:
break
LOG.debug("Client %d has sent %d messages", client_id, messages_count)
time.sleep(1) # wait for replies to be collected
def _rpc_call(client, msg):
try:
res = client.call({}, 'info', message=msg)
except Exception as e:
LOG.exception('Error %s on CALL for message %s', str(e), msg)
raise
else:
LOG.debug("SENT: %s, RCV: %s", msg, res)
return res
def _rpc_cast(client, msg):
try:
client.cast({}, 'info', message=msg)
except Exception as e:
LOG.exception('Error %s on CAST for message %s', str(e), msg)
raise
else:
LOG.debug("SENT: %s", msg)
def _notify(notification_client, msg):
notification_client.info({}, 'compute.start', msg)
def show_server_stats(endpoint, json_filename):
LOG.info('=' * 35 + ' summary ' + '=' * 35)
output = dict(series={}, summary={})
output['series']['server'] = endpoint.received_messages.get_series()
stats = MessageStatsCollector.calc_stats(
'server', endpoint.received_messages)
output['summary'] = stats
if json_filename:
write_json_file(json_filename, output)
def show_client_stats(clients, json_filename, has_reply=False):
LOG.info('=' * 35 + ' summary ' + '=' * 35)
output = dict(series={}, summary={})
for cl in clients:
cl_id = cl.client_id
output['series']['client_%s' % cl_id] = cl.sent_messages.get_series()
output['series']['error_%s' % cl_id] = cl.errors.get_series()
if has_reply:
output['series']['round_trip_%s' % cl_id] = (
cl.round_trip_messages.get_series())
sent_stats = MessageStatsCollector.calc_stats(
'client', *(cl.sent_messages for cl in clients))
output['summary']['client'] = sent_stats
error_stats = MessageStatsCollector.calc_stats(
'error', *(cl.errors for cl in clients))
output['summary']['error'] = error_stats
if has_reply:
round_trip_stats = MessageStatsCollector.calc_stats(
'round-trip', *(cl.round_trip_messages for cl in clients))
output['summary']['round_trip'] = round_trip_stats
if json_filename:
write_json_file(json_filename, output)
def write_json_file(filename, output):
with open(filename, 'w') as f:
f.write(json.dumps(output))
LOG.info('Stats are written into %s', filename)
def signal_handler(signum, frame):
global IS_RUNNING
IS_RUNNING = False
LOG.info('Signal %s is caught. Interrupting the execution', signum)
for server in SERVERS:
server.stop()
def _setup_logging(is_debug):
log_level = logging.DEBUG if is_debug else logging.INFO
logging.basicConfig(
stream=sys.stdout, level=log_level,
format="%(asctime)-15s %(levelname)s %(name)s %(message)s")
logging.getLogger().handlers[0].addFilter(LoggingNoParsingFilter())
for i in ['kombu', 'amqp', 'stevedore', 'qpid.messaging'
'oslo.messaging._drivers.amqp', ]:
logging.getLogger(i).setLevel(logging.WARN)
def main():
parser = argparse.ArgumentParser(
description='Tools to play with oslo.messaging\'s RPC',
usage=USAGE,
)
parser.add_argument('--url', dest='url',
default='rabbit://guest:password@localhost/',
help="oslo.messaging transport url")
parser.add_argument('-d', '--debug', dest='debug', type=bool,
default=False,
help="Turn on DEBUG logging level instead of WARN")
parser.add_argument('-tp', '--topic', dest='topic',
default="profiler_topic",
help="Topics to publish/receive messages to/from.")
parser.add_argument('-s', '--server', dest='server',
default="profiler_server",
help="Servers to publish/receive messages to/from.")
parser.add_argument('-tg', '--targets', dest='targets', nargs="+",
default=["profiler_topic.profiler_server"],
help="Targets to publish/receive messages to/from.")
parser.add_argument('-l', dest='duration', type=int,
help='send messages for certain time')
parser.add_argument('-j', '--json', dest='json_filename',
help='File name to store results in JSON format')
parser.add_argument('--config-file', dest='config_file', type=str,
help="Oslo messaging config file")
subparsers = parser.add_subparsers(dest='mode',
help='notify/rpc server/client mode')
server = subparsers.add_parser('notify-server')
server.add_argument('-w', dest='wait_before_answer', type=int, default=-1)
server.add_argument('--requeue', dest='requeue', action='store_true')
server = subparsers.add_parser('batch-notify-server')
server.add_argument('-w', dest='wait_before_answer', type=int, default=-1)
server.add_argument('--requeue', dest='requeue', action='store_true')
client = subparsers.add_parser('notify-client')
client.add_argument('-p', dest='threads', type=int, default=1,
help='number of client threads')
client.add_argument('-m', dest='messages', type=int, default=1,
help='number of call per threads')
client.add_argument('-w', dest='wait_after_msg', type=float, default=-1,
help='sleep time between two messages')
client.add_argument('--timeout', dest='timeout', type=int, default=3,
help='client timeout')
server = subparsers.add_parser('rpc-server')
server.add_argument('-w', dest='wait_before_answer', type=int, default=-1)
server.add_argument('-e', '--executor', dest='executor',
type=str, default='eventlet',
help='name of a message executor')
client = subparsers.add_parser('rpc-client')
client.add_argument('-p', dest='threads', type=int, default=1,
help='number of client threads')
client.add_argument('-m', dest='messages', type=int, default=1,
help='number of call per threads')
client.add_argument('-w', dest='wait_after_msg', type=float, default=-1,
help='sleep time between two messages')
client.add_argument('--timeout', dest='timeout', type=int, default=3,
help='client timeout')
client.add_argument('--exit-wait', dest='exit_wait', type=int, default=0,
help='Keep connections open N seconds after calls '
'have been done')
client.add_argument('--is-cast', dest='is_cast', type=bool, default=False,
help='Use `call` or `cast` RPC methods')
client.add_argument('--is-fanout', dest='is_fanout', type=bool,
default=False, help='fanout=True for CAST messages')
args = parser.parse_args()
_setup_logging(is_debug=args.debug)
if args.config_file:
cfg.CONF(["--config-file", args.config_file])
if args.mode in ['rpc-server', 'rpc-client']:
transport = messaging.get_transport(cfg.CONF, url=args.url)
else:
transport = messaging.get_notification_transport(cfg.CONF,
url=args.url)
if args.mode in ['rpc-client', 'notify-client']:
# always generate maximum number of messages for duration-limited tests
generate_messages(MESSAGES_LIMIT if args.duration else args.messages)
# oslo.config defaults
cfg.CONF.heartbeat_interval = 5
cfg.CONF.prog = os.path.basename(__file__)
cfg.CONF.project = 'oslo.messaging'
signal.signal(signal.SIGTERM, signal_handler)
signal.signal(signal.SIGINT, signal_handler)
if args.mode == 'rpc-server':
target = messaging.Target(topic=args.topic, server=args.server)
if args.url.startswith('zmq'):
cfg.CONF.rpc_zmq_matchmaker = "redis"
endpoint = rpc_server(transport, target, args.wait_before_answer,
args.executor, args.duration)
show_server_stats(endpoint, args.json_filename)
elif args.mode == 'notify-server':
endpoint = notify_server(transport, args.topic,
args.wait_before_answer, args.duration,
args.requeue)
show_server_stats(endpoint, args.json_filename)
elif args.mode == 'batch-notify-server':
endpoint = batch_notify_server(transport, args.topic,
args.wait_before_answer, args.duration,
args.requeue)
show_server_stats(endpoint, args.json_filename)
elif args.mode == 'notify-client':
spawn_notify_clients(args.threads, args.topic, transport,
args.messages, args.wait_after_msg, args.timeout,
args.duration)
show_client_stats(CLIENTS, args.json_filename)
elif args.mode == 'rpc-client':
targets = [target.partition('.')[::2] for target in args.targets]
targets = [messaging.Target(
topic=topic, server=server_name, fanout=args.is_fanout) for
topic, server_name in targets]
spawn_rpc_clients(args.threads, transport, targets,
args.wait_after_msg, args.timeout, args.is_cast,
args.messages, args.duration)
show_client_stats(CLIENTS, args.json_filename, not args.is_cast)
if args.exit_wait:
LOG.info("Finished. waiting for %d seconds", args.exit_wait)
time.sleep(args.exit_wait)
if __name__ == '__main__':
RANDOM_GENERATOR = init_random_generator()
CURRENT_PID = os.getpid()
main()
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