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# Copyright 2016 gRPC authors.
#
# 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.
"""Entry point for running stress tests."""
import argparse
from concurrent import futures
import threading
import grpc
from six.moves import queue
from src.proto.grpc.testing import metrics_pb2_grpc
from src.proto.grpc.testing import test_pb2_grpc
from tests.interop import methods
from tests.interop import resources
from tests.qps import histogram
from tests.stress import metrics_server
from tests.stress import test_runner
def _args():
parser = argparse.ArgumentParser(
description='gRPC Python stress test client')
parser.add_argument(
'--server_addresses',
help='comma separated list of hostname:port to run servers on',
default='localhost:8080',
type=str)
parser.add_argument(
'--test_cases',
help='comma separated list of testcase:weighting of tests to run',
default='large_unary:100',
type=str)
parser.add_argument('--test_duration_secs',
help='number of seconds to run the stress test',
default=-1,
type=int)
parser.add_argument('--num_channels_per_server',
help='number of channels per server',
default=1,
type=int)
parser.add_argument('--num_stubs_per_channel',
help='number of stubs to create per channel',
default=1,
type=int)
parser.add_argument('--metrics_port',
help='the port to listen for metrics requests on',
default=8081,
type=int)
parser.add_argument(
'--use_test_ca',
help='Whether to use our fake CA. Requires --use_tls=true',
default=False,
type=bool)
parser.add_argument('--use_tls',
help='Whether to use TLS',
default=False,
type=bool)
parser.add_argument('--server_host_override',
help='the server host to which to claim to connect',
type=str)
return parser.parse_args()
def _test_case_from_arg(test_case_arg):
for test_case in methods.TestCase:
if test_case_arg == test_case.value:
return test_case
else:
raise ValueError('No test case {}!'.format(test_case_arg))
def _parse_weighted_test_cases(test_case_args):
weighted_test_cases = {}
for test_case_arg in test_case_args.split(','):
name, weight = test_case_arg.split(':', 1)
test_case = _test_case_from_arg(name)
weighted_test_cases[test_case] = int(weight)
return weighted_test_cases
def _get_channel(target, args):
if args.use_tls:
if args.use_test_ca:
root_certificates = resources.test_root_certificates()
else:
root_certificates = None # will load default roots.
channel_credentials = grpc.ssl_channel_credentials(
root_certificates=root_certificates)
options = ((
'grpc.ssl_target_name_override',
args.server_host_override,
),)
channel = grpc.secure_channel(target,
channel_credentials,
options=options)
else:
channel = grpc.insecure_channel(target)
# waits for the channel to be ready before we start sending messages
grpc.channel_ready_future(channel).result()
return channel
def run_test(args):
test_cases = _parse_weighted_test_cases(args.test_cases)
test_server_targets = args.server_addresses.split(',')
# Propagate any client exceptions with a queue
exception_queue = queue.Queue()
stop_event = threading.Event()
hist = histogram.Histogram(1, 1)
runners = []
server = grpc.server(futures.ThreadPoolExecutor(max_workers=25))
metrics_pb2_grpc.add_MetricsServiceServicer_to_server(
metrics_server.MetricsServer(hist), server)
server.add_insecure_port('[::]:{}'.format(args.metrics_port))
server.start()
for test_server_target in test_server_targets:
for _ in range(args.num_channels_per_server):
channel = _get_channel(test_server_target, args)
for _ in range(args.num_stubs_per_channel):
stub = test_pb2_grpc.TestServiceStub(channel)
runner = test_runner.TestRunner(stub, test_cases, hist,
exception_queue, stop_event)
runners.append(runner)
for runner in runners:
runner.start()
try:
timeout_secs = args.test_duration_secs
if timeout_secs < 0:
timeout_secs = None
raise exception_queue.get(block=True, timeout=timeout_secs)
except queue.Empty:
# No exceptions thrown, success
pass
finally:
stop_event.set()
for runner in runners:
runner.join()
runner = None
server.stop(None)
if __name__ == '__main__':
run_test(_args())
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