3517ca453e
Add support for config options such as: head_requests_per_device_per_second = 100 Change-Id: I2936f799b6112155ff01dcd8e1f985849a1af178
1076 lines
50 KiB
Python
1076 lines
50 KiB
Python
# Copyright (c) 2022 NVIDIA
|
|
#
|
|
# 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.
|
|
|
|
# Used by get_swift_info and register_swift_info to store information about
|
|
# the swift cluster.
|
|
import os
|
|
import shutil
|
|
import time
|
|
import unittest
|
|
from collections import defaultdict
|
|
from tempfile import mkdtemp
|
|
|
|
import mock
|
|
|
|
from swift.common.middleware import backend_ratelimit
|
|
from swift.common.middleware.backend_ratelimit import \
|
|
BackendRateLimitMiddleware
|
|
from swift.common.swob import Request, HTTPOk
|
|
from test.debug_logger import debug_logger
|
|
from test.unit.common.middleware.helpers import FakeSwift
|
|
|
|
|
|
class FakeApp(object):
|
|
def __init__(self):
|
|
self.calls = []
|
|
|
|
def __call__(self, env, start_response):
|
|
start_response('200 OK', {})
|
|
return ['']
|
|
|
|
|
|
class TestBackendRatelimitMiddleware(unittest.TestCase):
|
|
def setUp(self):
|
|
super(TestBackendRatelimitMiddleware, self).setUp()
|
|
self.swift = FakeSwift()
|
|
self.tempdir = mkdtemp()
|
|
self.default_req_per_dev_per_sec = dict(
|
|
(key, 0.0) for key in
|
|
(None, 'GET', 'HEAD', 'PUT', 'POST', 'DELETE', 'UPDATE',
|
|
'REPLICATE')
|
|
)
|
|
|
|
def tearDown(self):
|
|
shutil.rmtree(self.tempdir, ignore_errors=True)
|
|
|
|
def test_init(self):
|
|
conf = {'swift_dir': self.tempdir}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
self.assertEqual(self.default_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(1.0, rl.requests_per_device_rate_buffer)
|
|
self.assertFalse(rl.is_any_rate_limit_configured)
|
|
|
|
conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': 1.3,
|
|
'requests_per_device_rate_buffer': 2.4}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 1.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
|
|
conf = {'requests_per_device_per_second': -1}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
with self.assertRaises(ValueError) as cm:
|
|
factory(self.swift)
|
|
self.assertEqual(
|
|
'Value must be a non-negative float number, not "-1.0".',
|
|
str(cm.exception))
|
|
|
|
conf = {'requests_per_device_rate_buffer': -1}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
with self.assertRaises(ValueError):
|
|
factory(self.swift)
|
|
self.assertEqual(
|
|
'Value must be a non-negative float number, not "-1.0".',
|
|
str(cm.exception))
|
|
|
|
def test_init_conf_path(self):
|
|
conf = {}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
self.assertEqual('/etc/swift/backend-ratelimit.conf', rl.conf_path)
|
|
conf = {'backend_ratelimit_conf_path': '/etc/other/rl.conf'}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
self.assertEqual('/etc/other/rl.conf', rl.conf_path)
|
|
conf = {'backend_ratelimit_conf_path': ''}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
self.assertEqual('', rl.conf_path)
|
|
|
|
def test_init_conf_reload_interval(self):
|
|
conf = {}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
self.assertEqual(60, rl.config_reload_interval)
|
|
conf = {'config_reload_interval': 600}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
self.assertEqual(600, rl.config_reload_interval)
|
|
conf = {'config_reload_interval': 0}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
self.assertEqual(0, rl.config_reload_interval)
|
|
|
|
def test_bad(value):
|
|
with self.assertRaises(ValueError) as cm:
|
|
conf = {'config_reload_interval': value}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
factory(self.swift)
|
|
self.assertIn('Value must be a non-negative float number',
|
|
str(cm.exception))
|
|
test_bad(-1)
|
|
test_bad('auto')
|
|
|
|
def test_init_config_file_set_and_missing(self):
|
|
# warn if missing conf file during init (conf_path set)
|
|
def do_test(conf_path):
|
|
conf = {'backend_ratelimit_conf_path': '%s' % conf_path,
|
|
'requests_per_device_per_second': "1.3"}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec.update({None: 1.3})
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(1.0, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
self.assertEqual(
|
|
['Failed to load config file, config unchanged: Unable to '
|
|
'read config from %s' % conf_path],
|
|
rl.logger.get_lines_for_level('warning'))
|
|
|
|
do_test('')
|
|
do_test(os.path.join(self.tempdir, 'backend_rl.conf'))
|
|
|
|
def test_init_config_file_unset_and_missing(self):
|
|
# don't warn if missing conf file during init (conf_path not set)
|
|
conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3"}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 1.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(1.0, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
|
|
def test_init_config_file_no_section(self):
|
|
# warn and ignore conf file without section
|
|
conf_path = os.path.join(self.tempdir, 'backend_rl.conf')
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[DEFAULT]\n'
|
|
'requests_per_device_per_second = 12.3\n')
|
|
conf = {'backend_ratelimit_conf_path': '%s' % conf_path,
|
|
'requests_per_device_per_second': 1.3}
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 1.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(1.0, rl.requests_per_device_rate_buffer)
|
|
lines = rl.logger.get_lines_for_level('warning')
|
|
self.assertEqual(1, len(lines), lines)
|
|
self.assertIn('Invalid config file', lines[0])
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
def test_read_default_backend_ratelimit_conf(self):
|
|
conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4",
|
|
# do not set 'backend_ratelimit_conf_path'
|
|
'config_reload_interval': 15}
|
|
# but set it up anyway
|
|
conf_path = os.path.join(self.tempdir, 'backend-ratelimit.conf')
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 12.3\n')
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
# backend-ratelimit.conf overrides options
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 12.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
# but only the ones that are listed
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
lines = rl.logger.get_lines_for_level('info')
|
|
self.assertEqual(['Loaded config file %s, config changed' % conf_path],
|
|
lines)
|
|
|
|
def test_config_reload_does_not_override_reload_options(self):
|
|
conf_path = os.path.join(self.tempdir, 'override-ratelimit.conf')
|
|
conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4",
|
|
'backend_ratelimit_conf_path': conf_path,
|
|
'config_reload_interval': 15}
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 12.3\n'
|
|
'requests_per_device_rate_buffer = 12.4\n'
|
|
'backend_ratelimit_conf_path = /etc/swift/ignored.conf\n'
|
|
'config_reload_interval = 999999\n')
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 12.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(12.4, rl.requests_per_device_rate_buffer)
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
# options related to conf file loading are not loaded from conf file...
|
|
self.assertEqual(conf_path, rl.conf_path)
|
|
self.assertEqual(15, rl.config_reload_interval)
|
|
lines = rl.logger.logger.get_lines_for_level('info')
|
|
self.assertEqual(['Loaded config file %s, config changed' % conf_path],
|
|
lines)
|
|
|
|
def _do_test_init_config_file_overrides_filter_conf(
|
|
self, path_to_actual_conf_file, configured_conf_path):
|
|
# verify that conf file options override filter conf options
|
|
# create the actual file, but no options
|
|
with open(path_to_actual_conf_file, 'w') as fd:
|
|
fd.write('[backend_ratelimit]')
|
|
conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4",
|
|
'config_reload_interval': 15}
|
|
if configured_conf_path:
|
|
# only configure if given a conf_path
|
|
conf['backend_ratelimit_conf_path'] = configured_conf_path
|
|
exp_configured_conf_path = configured_conf_path
|
|
else:
|
|
# fall back to default
|
|
exp_configured_conf_path = os.path.join(self.tempdir,
|
|
'backend-ratelimit.conf')
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 1.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
self.assertEqual(exp_configured_conf_path, rl.conf_path)
|
|
self.assertEqual(15, rl.config_reload_interval)
|
|
|
|
# create file with option
|
|
with open(path_to_actual_conf_file, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 12.3\n'
|
|
'backend_ratelimit_conf_path = /etc/swift/ignored.conf\n'
|
|
'config_reload_interval = 999999\n')
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec[None] = 12.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
# options related to conf file loading are not loaded from conf file...
|
|
self.assertEqual(exp_configured_conf_path, rl.conf_path)
|
|
self.assertEqual(15, rl.config_reload_interval)
|
|
|
|
with open(path_to_actual_conf_file, 'w') as fd:
|
|
fd.write(
|
|
'[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 5.3\n'
|
|
'requests_per_device_rate_buffer = 0.5\n'
|
|
'delete_requests_per_device_per_second = 1\n'
|
|
'get_requests_per_device_per_second = 2\n'
|
|
'head_requests_per_device_per_second = 3\n'
|
|
'post_requests_per_device_per_second = 4\n'
|
|
'put_requests_per_device_per_second = 5\n'
|
|
'replicate_requests_per_device_per_second = 6\n'
|
|
'update_requests_per_device_per_second = 7\n'
|
|
'backend_ratelimit_conf_path = /etc/swift/ignored.conf\n'
|
|
'config_reload_interval = 999999\n'
|
|
)
|
|
factory = backend_ratelimit.filter_factory(conf)
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec.update(
|
|
{
|
|
None: 5.3,
|
|
'DELETE': 1,
|
|
'GET': 2,
|
|
'HEAD': 3,
|
|
'POST': 4,
|
|
'PUT': 5,
|
|
'REPLICATE': 6,
|
|
'UPDATE': 7,
|
|
}
|
|
)
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(0.5, rl.requests_per_device_rate_buffer)
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
# options related to conf file loading are not loaded from conf file...
|
|
self.assertEqual(exp_configured_conf_path, rl.conf_path)
|
|
self.assertEqual(15, rl.config_reload_interval)
|
|
|
|
def test_init_config_file_at_default_path_overrides_filter_conf(self):
|
|
# default conf path is loaded if it exists
|
|
default_conf_path = os.path.join(self.tempdir,
|
|
'backend-ratelimit.conf')
|
|
self._do_test_init_config_file_overrides_filter_conf(
|
|
path_to_actual_conf_file=default_conf_path,
|
|
configured_conf_path=None)
|
|
|
|
self._do_test_init_config_file_overrides_filter_conf(
|
|
path_to_actual_conf_file=default_conf_path,
|
|
configured_conf_path=default_conf_path)
|
|
|
|
def test_init_config_file_at_configured_path_overrides_filter_conf(self):
|
|
# explicitly configured conf path is loaded
|
|
custom_conf_path = os.path.join(self.tempdir, 'backend_rl.conf')
|
|
self._do_test_init_config_file_overrides_filter_conf(
|
|
path_to_actual_conf_file=custom_conf_path,
|
|
configured_conf_path=custom_conf_path)
|
|
|
|
def _do_test_config_file_reload(self, reload_interval):
|
|
# verify that conf file options are periodically reloaded
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4",
|
|
'head_requests_per_device_per_second': '6.2'}
|
|
if reload_interval:
|
|
filter_conf['config_reload_interval'] = reload_interval
|
|
|
|
now = time.time()
|
|
# create the actual file
|
|
conf_path = os.path.join(filter_conf['swift_dir'],
|
|
'backend-ratelimit.conf')
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 12.3\n'
|
|
# conf file cannot re-configure where the conf file is...
|
|
'backend_ratelimit_conf_path = /etc/ignored\n'
|
|
'config_reload_interval = also_ignored\n')
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec.update({None: 12.3, 'HEAD': float(
|
|
filter_conf['head_requests_per_device_per_second'])})
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(float(filter_conf['requests_per_device_rate_buffer']),
|
|
rl.requests_per_device_rate_buffer)
|
|
self.assertEqual(conf_path, rl.conf_path)
|
|
|
|
# modify the conf file
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 29.3\n'
|
|
'requests_per_device_rate_buffer = 12.4\n'
|
|
'backend_ratelimit_conf_path = /etc/ignored\n'
|
|
'config_reload_interval = also_ignored\n'
|
|
'head_requests_per_device_per_second = 5.1\n'
|
|
'delete_requests_per_device_per_second = 7.3\n'
|
|
'get_requests_per_device_per_second = 8.4\n')
|
|
|
|
# send some requests, but too soon for config file to be reloaded
|
|
req1 = Request.blank('/sda1/99/a/c/o')
|
|
req2 = Request.blank('/sda2/99/a/c/o',
|
|
environ={'REQUEST_METHOD': 'DELETE'})
|
|
self.swift.register(req1.method, req1.path, HTTPOk, {})
|
|
self.swift.register(req2.method, req2.path, HTTPOk, {})
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + rl.config_reload_interval - 1):
|
|
resp1 = req1.get_response(rl)
|
|
resp2 = req2.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
self.assertEqual(200, resp2.status_int)
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(float(filter_conf['requests_per_device_rate_buffer']),
|
|
rl.requests_per_device_rate_buffer)
|
|
self.assertEqual(conf_path, rl.conf_path)
|
|
|
|
# verify the per dev ratelimiters
|
|
self.assertEqual({('sda1', 'GET'): 0.0,
|
|
('sda2', 'DELETE'): 0.0,
|
|
('sda1', None): 12.3,
|
|
('sda2', None): 12.3},
|
|
dict((key, val.max_rate)
|
|
for key, val in rl.rate_limiters.items()))
|
|
for (dev, method), limiter in rl.rate_limiters.items():
|
|
self.assertEqual(2.4 * limiter.clock_accuracy,
|
|
limiter.rate_buffer_ms, (dev, method))
|
|
|
|
# send some requests, time for config file to be reloaded
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + rl.config_reload_interval + 0.01):
|
|
resp1 = req1.get_response(rl)
|
|
resp2 = req2.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
self.assertEqual(200, resp2.status_int)
|
|
exp_req_per_dev_per_sec.update({
|
|
None: 29.3,
|
|
'HEAD': 5.1,
|
|
'DELETE': 7.3,
|
|
'GET': 8.4})
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(12.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual(conf_path, rl.conf_path)
|
|
|
|
# verify the per dev ratelimiters were updated
|
|
self.assertEqual({('sda1', 'GET'): 8.4,
|
|
('sda2', 'DELETE'): 7.3,
|
|
('sda1', None): 29.3,
|
|
('sda2', None): 29.3},
|
|
dict((key, val.max_rate)
|
|
for key, val in rl.rate_limiters.items()))
|
|
for (dev, method), limiter in rl.rate_limiters.items():
|
|
self.assertEqual(12.4 * limiter.clock_accuracy,
|
|
limiter.rate_buffer_ms, (dev, method))
|
|
|
|
# modify the config file again
|
|
# remove requests_per_device_per_second option
|
|
# remove [head|delete]_requests_per_device_per_second options
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'backend_ratelimit_conf_path = /etc/ignored\n'
|
|
'config_reload_interval = also_ignored\n'
|
|
'requests_per_device_rate_buffer = 0.5\n'
|
|
'get_requests_per_device_per_second = 9.5\n')
|
|
|
|
# send some requests, not yet time for config file to be reloaded
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 2 * rl.config_reload_interval - 1):
|
|
resp1 = req1.get_response(rl)
|
|
resp2 = req2.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
self.assertEqual(200, resp2.status_int)
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(12.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual(conf_path, rl.conf_path)
|
|
|
|
# verify the per dev ratelimiters were not updated
|
|
self.assertEqual({('sda1', 'GET'): 8.4,
|
|
('sda2', 'DELETE'): 7.3,
|
|
('sda1', None): 29.3,
|
|
('sda2', None): 29.3},
|
|
dict((key, val.max_rate)
|
|
for key, val in rl.rate_limiters.items()))
|
|
for (dev, method), limiter in rl.rate_limiters.items():
|
|
self.assertEqual(12.4 * limiter.clock_accuracy,
|
|
limiter.rate_buffer_ms, (dev, method))
|
|
|
|
# send some requests, time for config file to be reloaded
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 2 * rl.config_reload_interval + 0.01):
|
|
resp1 = req1.get_response(rl)
|
|
resp2 = req2.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
self.assertEqual(200, resp2.status_int)
|
|
# requests_per_device_per_second option reverts to filter conf
|
|
# delete_requests_per_device_per_second option reverts to default
|
|
# head_requests_per_device_per_second option reverts to filter conf
|
|
exp_req_per_dev_per_sec.update({
|
|
None: 1.3,
|
|
'HEAD': 6.2,
|
|
'DELETE': 0.0,
|
|
'GET': 9.5})
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(0.5, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual(conf_path, rl.conf_path)
|
|
|
|
# verify the per dev ratelimiters were updated
|
|
self.assertEqual({('sda1', 'GET'): 9.5,
|
|
('sda2', 'DELETE'): 0.0,
|
|
('sda1', None): 1.3,
|
|
('sda2', None): 1.3},
|
|
dict((key, val.max_rate)
|
|
for key, val in rl.rate_limiters.items()))
|
|
for (dev, method), limiter in rl.rate_limiters.items():
|
|
self.assertEqual(0.5 * limiter.clock_accuracy,
|
|
limiter.rate_buffer_ms, (dev, method))
|
|
return rl
|
|
|
|
def test_config_file_reload_default_interval(self):
|
|
rl = self._do_test_config_file_reload(None)
|
|
self.assertEqual(60, rl.config_reload_interval)
|
|
|
|
def test_config_file_reload_custom_interval(self):
|
|
rl = self._do_test_config_file_reload(30.1)
|
|
self.assertEqual(30.1, rl.config_reload_interval)
|
|
|
|
def test_config_file_reload_clears_all_limits(self):
|
|
# verify that reloaded config file can disable all rate limits
|
|
now = time.time()
|
|
conf_path = os.path.join(self.tempdir, 'missing')
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
# path set so expect warning during init
|
|
'backend_ratelimit_conf_path': conf_path,
|
|
'requests_per_device_per_second': "1.3",
|
|
'head_requests_per_device_per_second = 1.1\n'
|
|
'requests_per_device_rate_buffer': "2.4"}
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 29.3\n'
|
|
'head_requests_per_device_per_second = 5.1\n'
|
|
'get_requests_per_device_per_second = 8.4\n')
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
|
|
# expect warning during init
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
# filter conf has been applied
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec.update({
|
|
None: 29.3,
|
|
'HEAD': 5.1,
|
|
'GET': 8.4})
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
# write zero rate limits to conf file
|
|
# jump into future, send request, config reload attempted
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 0.0\n'
|
|
'head_requests_per_device_per_second = 0.0\n'
|
|
'get_requests_per_device_per_second = 0.0\n')
|
|
req1 = Request.blank('/sda1/99/a/c/o')
|
|
self.swift.register(req1.method, req1.path, HTTPOk, {})
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 10000):
|
|
resp1 = req1.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
self.assertFalse(rl.is_any_rate_limit_configured)
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
def test_config_file_reload_set_and_missing(self):
|
|
now = time.time()
|
|
conf_path = os.path.join(self.tempdir, 'missing')
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
# path set so expect warning during init
|
|
'backend_ratelimit_conf_path': conf_path,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4"}
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
|
|
# expect warning during init
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
# filter conf has been applied
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 1.3
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual(
|
|
['Failed to load config file, config unchanged: Unable to read '
|
|
'config from %s' % conf_path],
|
|
rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
# jump into future, send request, config reload attempted
|
|
# no ongoing warning
|
|
rl.logger.logger.clear()
|
|
req1 = Request.blank('/sda1/99/a/c/o')
|
|
self.swift.register(req1.method, req1.path, HTTPOk, {})
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 10000):
|
|
resp1 = req1.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
self.assertTrue(rl.is_any_rate_limit_configured)
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
def test_config_file_reload_unset_and_missing(self):
|
|
now = time.time()
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
# conf path not set so expect no warnings
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4"}
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
|
|
# expect NO warning during init
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
# filter conf has been applied
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 1.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
# jump into future, send request, config reload attempted
|
|
# no ongoing warning
|
|
req1 = Request.blank('/sda1/99/a/c/o')
|
|
self.swift.register(req1.method, req1.path, HTTPOk, {})
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 10000):
|
|
resp1 = req1.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
# previous conf file value has been retained
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
def test_config_file_reload_empty_section(self):
|
|
# verify that empty section is OK
|
|
now = time.time()
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4"}
|
|
# create the actual file
|
|
conf_path = os.path.join(self.tempdir, 'backend-ratelimit.conf')
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n')
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
# conf file value has been applied
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 1.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
def test_config_file_reload_error(self):
|
|
# verify that current config is preserved if reload fails
|
|
now = time.time()
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4"}
|
|
# create the actual file
|
|
conf_path = os.path.join(self.tempdir, 'backend-ratelimit.conf')
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 12.3\n')
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
# conf file value has been applied
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 12.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 29.3\n')
|
|
|
|
# jump into future, send request, config reload attempted but fails
|
|
req1 = Request.blank('/sda1/99/a/c/o')
|
|
self.swift.register(req1.method, req1.path, HTTPOk, {})
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 10000):
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.readconf',
|
|
side_effect=ValueError('BOOM')
|
|
) as mock_readconf:
|
|
resp1 = req1.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
# previous conf file value has been retained
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
mock_readconf.assert_called_once()
|
|
self.assertEqual(
|
|
['Invalid config file %s, config unchanged: BOOM' % conf_path],
|
|
rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
# the reload is not tried again immediately
|
|
rl.logger = debug_logger()
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 10059):
|
|
resp1 = req1.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
# previous conf file value has been retained
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
# ..but will be retried after reload interval
|
|
rl.logger = debug_logger()
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 10060):
|
|
resp1 = req1.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
# previous conf file value has been retained
|
|
exp_req_per_dev_per_sec.update({None: 29.3})
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
self.assertEqual([], rl.logger.get_lines_for_level('warning'))
|
|
self.assertEqual([], rl.logger.get_lines_for_level('error'))
|
|
|
|
def test_config_file_reload_logging(self):
|
|
# verify that config reload is logged when config changes
|
|
now = time.time()
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4"}
|
|
# create the actual file
|
|
conf_path = os.path.join(self.tempdir, 'backend-ratelimit.conf')
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 12.3\n')
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
# conf file value has been applied
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 12.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
lines = rl.logger.get_lines_for_level('info')
|
|
self.assertEqual(['Loaded config file %s, config changed' % conf_path],
|
|
lines)
|
|
|
|
# jump into future, send request, config reload attempted, no change
|
|
rl.logger.logger.clear()
|
|
req1 = Request.blank('/sda1/99/a/c/o')
|
|
self.swift.register(req1.method, req1.path, HTTPOk, {})
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 10000):
|
|
resp1 = req1.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
lines = rl.logger.get_lines_for_level('info')
|
|
self.assertEqual([], lines)
|
|
|
|
# modify config file, jump into future, change logged
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 23.4\n')
|
|
rl.logger = debug_logger()
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 10060):
|
|
resp1 = req1.get_response(rl)
|
|
self.assertEqual(200, resp1.status_int)
|
|
# previous conf file value has been retained
|
|
exp_req_per_dev_per_sec.update({None: 23.4})
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
lines = rl.logger.get_lines_for_level('info')
|
|
self.assertEqual(['Loaded config file %s, config changed' % conf_path],
|
|
lines)
|
|
|
|
def test_config_file_disappears_appears_logging(self):
|
|
# verify that config reload is logged when file reappears
|
|
now = time.time()
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4"}
|
|
# create the actual file
|
|
conf_path = os.path.join(self.tempdir, 'backend-ratelimit.conf')
|
|
conf_str = ('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 12.3\n')
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write(conf_str)
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.get_logger',
|
|
return_value=debug_logger()):
|
|
rl = factory(self.swift)
|
|
# conf file value has been applied
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 12.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
lines = rl.logger.get_lines_for_level('info')
|
|
self.assertEqual(
|
|
['Loaded config file %s, config changed' % conf_path],
|
|
lines)
|
|
lines = rl.logger.get_lines_for_level('warning')
|
|
self.assertFalse(lines)
|
|
|
|
def do_request(now):
|
|
rl.logger.logger.clear()
|
|
req1 = Request.blank('/sda1/99/a/c/o')
|
|
self.swift.register(req1.method, req1.path, HTTPOk, {})
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
resp = req1.get_response(rl)
|
|
self.assertEqual(200, resp.status_int)
|
|
info_lines = rl.logger.get_lines_for_level('info')
|
|
warning_lines = rl.logger.get_lines_for_level('warning')
|
|
return info_lines, warning_lines
|
|
|
|
# jump into future, send request, config reload fails - warning
|
|
os.unlink(conf_path)
|
|
now += 100
|
|
info_lines, warning_lines = do_request(now)
|
|
self.assertFalse(info_lines)
|
|
self.assertEqual(
|
|
['Failed to load config file, config unchanged: Unable to '
|
|
'read config from %s' % conf_path], warning_lines)
|
|
|
|
# jump into future, send request, config reload fails - no warning
|
|
now += 100
|
|
info_lines, warning_lines = do_request(now)
|
|
self.assertFalse(info_lines)
|
|
self.assertFalse(warning_lines)
|
|
|
|
# reinstate conf file
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write(conf_str)
|
|
|
|
# jump into future, send request, config reload succeeds - logged
|
|
now += 100
|
|
info_lines, warning_lines = do_request(now)
|
|
self.assertEqual('Loaded new config file %s, config unchanged'
|
|
% conf_path, info_lines[0])
|
|
self.assertFalse(warning_lines)
|
|
|
|
# jump into future, send request, config reload succeeds - not logged
|
|
now += 100
|
|
info_lines, warning_lines = do_request(now)
|
|
self.assertFalse(info_lines)
|
|
self.assertFalse(warning_lines)
|
|
|
|
def test_config_file_reload_disabled(self):
|
|
# verify that conf file options are not periodically reloaded when
|
|
# interval is zero
|
|
now = time.time()
|
|
filter_conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': "1.3",
|
|
'requests_per_device_rate_buffer': "2.4",
|
|
'config_reload_interval': 0}
|
|
conf_path = os.path.join(self.tempdir, 'backend-ratelimit.conf')
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 12.3\n')
|
|
factory = backend_ratelimit.filter_factory(filter_conf)
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now):
|
|
rl = factory(self.swift)
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 12.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
|
|
with open(conf_path, 'w') as fd:
|
|
fd.write('[backend_ratelimit]\n'
|
|
'requests_per_device_per_second = 29.3\n')
|
|
|
|
req = Request.blank('/sda1/99/a/c/o')
|
|
self.swift.register(req.method, req.path, HTTPOk, {})
|
|
# jump way into the future...
|
|
with mock.patch('swift.common.middleware.backend_ratelimit.time.time',
|
|
return_value=now + 100000):
|
|
resp = req.get_response(rl)
|
|
self.assertEqual(200, resp.status_int)
|
|
# no change
|
|
exp_req_per_dev_per_sec = dict(self.default_req_per_dev_per_sec)
|
|
exp_req_per_dev_per_sec[None] = 12.3
|
|
self.assertEqual(exp_req_per_dev_per_sec,
|
|
rl.requests_per_device_per_second)
|
|
self.assertEqual(2.4, rl.requests_per_device_rate_buffer)
|
|
|
|
def _do_test_ratelimit(self, method, req_per_sec, rate_buffer,
|
|
extra_conf=None):
|
|
# send 20 requests, time increments by 0.01 between each request
|
|
start = time.time()
|
|
fake_time = [start]
|
|
|
|
def mock_time():
|
|
return fake_time[0]
|
|
|
|
app = FakeSwift()
|
|
logger = debug_logger()
|
|
# apply a ratelimit
|
|
conf = {'swift_dir': self.tempdir,
|
|
'requests_per_device_per_second': req_per_sec,
|
|
'requests_per_device_rate_buffer': rate_buffer}
|
|
if extra_conf:
|
|
conf.update(extra_conf)
|
|
rl = BackendRateLimitMiddleware(app, conf, logger)
|
|
success = defaultdict(int)
|
|
ratelimited = 0
|
|
|
|
with mock.patch('swift.common.utils.time.time', mock_time):
|
|
for i in range(20):
|
|
for dev in ['sda1', 'sda2', 'sda3']:
|
|
req = Request.blank('/%s/99/a/c/o' % dev,
|
|
environ={'REQUEST_METHOD': method})
|
|
app.register(method, req.path, HTTPOk, {})
|
|
resp = req.get_response(rl)
|
|
if resp.status_int == 200:
|
|
success[dev] += 1
|
|
else:
|
|
self.assertEqual(529, resp.status_int)
|
|
self.assertTrue(resp.status.startswith(
|
|
'529 Too Many Backend Requests'))
|
|
ratelimited += 1
|
|
fake_time[0] += 0.01
|
|
self.assertEqual(
|
|
ratelimited,
|
|
logger.statsd_client.get_increment_counts().get(
|
|
'backend.ratelimit', 0))
|
|
return success
|
|
|
|
def test_method_ratelimited(self):
|
|
def do_test_ratelimit(method):
|
|
# no rate-limiting
|
|
success_per_dev = self._do_test_ratelimit(method, 0, 0)
|
|
self.assertEqual([20] * 3, list(success_per_dev.values()))
|
|
|
|
# global rate-limited
|
|
success_per_dev = self._do_test_ratelimit(method, 1, 0)
|
|
self.assertEqual([1] * 3, list(success_per_dev.values()))
|
|
|
|
success_per_dev = self._do_test_ratelimit(method, 10, 0)
|
|
self.assertEqual([2] * 3, list(success_per_dev.values()))
|
|
|
|
success_per_dev = self._do_test_ratelimit(method, 101, 0)
|
|
self.assertEqual([20] * 3, list(success_per_dev.values()))
|
|
|
|
# startup burst of 1 seconds allowance plus current allowance...
|
|
success_per_dev = self._do_test_ratelimit(method, 1, 1)
|
|
self.assertEqual([2] * 3, list(success_per_dev.values()))
|
|
success_per_dev = self._do_test_ratelimit(method, 10, 1)
|
|
self.assertEqual([12] * 3, list(success_per_dev.values()))
|
|
|
|
# method rate-limited
|
|
extra_conf = {
|
|
'%s_requests_per_device_per_second' % method.lower(): 1
|
|
}
|
|
success_per_dev = self._do_test_ratelimit(method, 0, 0, extra_conf)
|
|
self.assertEqual([1] * 3, list(success_per_dev.values()))
|
|
|
|
# method not rate-limited, global rate limited
|
|
extra_conf = {
|
|
'%s_requests_per_device_per_second' % method.lower(): 100
|
|
}
|
|
success_per_dev = self._do_test_ratelimit(method, 1, 0, extra_conf)
|
|
self.assertEqual([1] * 3, list(success_per_dev.values()))
|
|
|
|
do_test_ratelimit('GET')
|
|
do_test_ratelimit('HEAD')
|
|
do_test_ratelimit('PUT')
|
|
do_test_ratelimit('POST')
|
|
do_test_ratelimit('DELETE')
|
|
do_test_ratelimit('UPDATE')
|
|
do_test_ratelimit('REPLICATE')
|
|
|
|
def test_method_not_ratelimited(self):
|
|
def do_test_no_ratelimit(method):
|
|
# verify no rate-limiting
|
|
success_per_dev = self._do_test_ratelimit(method, 1, 0)
|
|
self.assertEqual([20] * 3, list(success_per_dev.values()))
|
|
|
|
do_test_no_ratelimit('OPTIONS')
|
|
do_test_no_ratelimit('SSYNC')
|
|
|
|
def test_no_ratelimiting_configured(self):
|
|
# verify shortcut path when no ratelimiting is configured
|
|
with mock.patch(
|
|
'swift.common.middleware.backend_ratelimit.'
|
|
'BackendRateLimitMiddleware._is_allowed') as mock_is_allowed:
|
|
success_per_dev = self._do_test_ratelimit('GET', 0, 0)
|
|
self.assertEqual([20] * 3, list(success_per_dev.values()))
|
|
mock_is_allowed.assert_not_called()
|
|
|
|
def test_unhandled_request(self):
|
|
app = FakeSwift()
|
|
logger = debug_logger()
|
|
conf = {'requests_per_device_per_second': 1,
|
|
'requests_per_device_rate_buffer': 1}
|
|
|
|
def do_test(path):
|
|
rl = BackendRateLimitMiddleware(app, conf, logger)
|
|
req = Request.blank(path)
|
|
app.register('GET', req.path, HTTPOk, {})
|
|
for i in range(10):
|
|
resp = req.get_response(rl)
|
|
self.assertEqual(200, resp.status_int)
|
|
self.assertEqual(
|
|
0, logger.statsd_client.get_increment_counts().get(
|
|
'backend.ratelimit', 0))
|
|
|
|
do_test('/recon/version')
|
|
do_test('/healthcheck')
|
|
do_test('/v1/a/c/o')
|