swift/test/unit/common/middleware/test_ratelimit.py
janonymous f5f9d791b0 pep8 fix: assertEquals -> assertEqual
assertEquals is deprecated in py3, replacing it.

Change-Id: Ida206abbb13c320095bb9e3b25a2b66cc31bfba8
Co-Authored-By: Ondřej Nový <ondrej.novy@firma.seznam.cz>
2015-10-11 12:57:25 +02:00

652 lines
25 KiB
Python

# Copyright (c) 2010-2012 OpenStack Foundation
#
# 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 unittest
import time
import eventlet
import mock
from contextlib import contextmanager
from threading import Thread
from test.unit import FakeLogger
from swift.common.middleware import ratelimit
from swift.proxy.controllers.base import get_container_memcache_key, \
headers_to_container_info
from swift.common.memcached import MemcacheConnectionError
from swift.common.swob import Request
from swift.common import utils
class FakeMemcache(object):
def __init__(self):
self.store = {}
self.error_on_incr = False
self.init_incr_return_neg = False
def get(self, key):
return self.store.get(key)
def set(self, key, value, serialize=False, time=0):
self.store[key] = value
return True
def incr(self, key, delta=1, time=0):
if self.error_on_incr:
raise MemcacheConnectionError('Memcache restarting')
if self.init_incr_return_neg:
# simulate initial hit, force reset of memcache
self.init_incr_return_neg = False
return -10000000
self.store[key] = int(self.store.setdefault(key, 0)) + int(delta)
if self.store[key] < 0:
self.store[key] = 0
return int(self.store[key])
def decr(self, key, delta=1, time=0):
return self.incr(key, delta=-delta, time=time)
@contextmanager
def soft_lock(self, key, timeout=0, retries=5):
yield True
def delete(self, key):
try:
del self.store[key]
except Exception:
pass
return True
def mock_http_connect(response, headers=None, with_exc=False):
class FakeConn(object):
def __init__(self, status, headers, with_exc):
self.status = status
self.reason = 'Fake'
self.host = '1.2.3.4'
self.port = '1234'
self.with_exc = with_exc
self.headers = headers
if self.headers is None:
self.headers = {}
def getresponse(self):
if self.with_exc:
raise Exception('test')
return self
def getheader(self, header):
return self.headers[header]
def read(self, amt=None):
return ''
def close(self):
return
return lambda *args, **kwargs: FakeConn(response, headers, with_exc)
class FakeApp(object):
def __call__(self, env, start_response):
return ['204 No Content']
def start_response(*args):
pass
time_ticker = 0
time_override = []
def mock_sleep(x):
global time_ticker
time_ticker += x
def mock_time():
global time_override
global time_ticker
if time_override:
cur_time = time_override.pop(0)
if cur_time is None:
time_override = [None if i is None else i + time_ticker
for i in time_override]
return time_ticker
return cur_time
return time_ticker
class TestRateLimit(unittest.TestCase):
def _reset_time(self):
global time_ticker
time_ticker = 0
def setUp(self):
self.was_sleep = eventlet.sleep
eventlet.sleep = mock_sleep
self.was_time = time.time
time.time = mock_time
self._reset_time()
def tearDown(self):
eventlet.sleep = self.was_sleep
time.time = self.was_time
def _run(self, callable_func, num, rate, check_time=True):
global time_ticker
begin = time.time()
for x in range(num):
callable_func()
end = time.time()
total_time = float(num) / rate - 1.0 / rate # 1st request not limited
# Allow for one second of variation in the total time.
time_diff = abs(total_time - (end - begin))
if check_time:
self.assertEqual(round(total_time, 1), round(time_ticker, 1))
return time_diff
def test_get_maxrate(self):
conf_dict = {'container_ratelimit_10': 200,
'container_ratelimit_50': 100,
'container_ratelimit_75': 30}
test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
test_ratelimit.logger = FakeLogger()
self.assertEqual(ratelimit.get_maxrate(
test_ratelimit.container_ratelimits, 0), None)
self.assertEqual(ratelimit.get_maxrate(
test_ratelimit.container_ratelimits, 5), None)
self.assertEqual(ratelimit.get_maxrate(
test_ratelimit.container_ratelimits, 10), 200)
self.assertEqual(ratelimit.get_maxrate(
test_ratelimit.container_ratelimits, 60), 72)
self.assertEqual(ratelimit.get_maxrate(
test_ratelimit.container_ratelimits, 160), 30)
def test_get_ratelimitable_key_tuples(self):
current_rate = 13
conf_dict = {'account_ratelimit': current_rate,
'container_ratelimit_3': 200}
fake_memcache = FakeMemcache()
fake_memcache.store[get_container_memcache_key('a', 'c')] = \
{'object_count': '5'}
the_app = ratelimit.filter_factory(conf_dict)(FakeApp())
the_app.memcache_client = fake_memcache
req = lambda: None
req.environ = {'swift.cache': fake_memcache, 'PATH_INFO': '/v1/a/c/o'}
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
req.method = 'DELETE'
self.assertEqual(len(the_app.get_ratelimitable_key_tuples(
req, 'a', None, None)), 0)
req.method = 'PUT'
self.assertEqual(len(the_app.get_ratelimitable_key_tuples(
req, 'a', 'c', None)), 1)
req.method = 'DELETE'
self.assertEqual(len(the_app.get_ratelimitable_key_tuples(
req, 'a', 'c', None)), 1)
req.method = 'GET'
self.assertEqual(len(the_app.get_ratelimitable_key_tuples(
req, 'a', 'c', 'o')), 0)
req.method = 'PUT'
self.assertEqual(len(the_app.get_ratelimitable_key_tuples(
req, 'a', 'c', 'o')), 1)
req.method = 'PUT'
self.assertEqual(len(the_app.get_ratelimitable_key_tuples(
req, 'a', 'c', None, global_ratelimit=10)), 2)
self.assertEqual(the_app.get_ratelimitable_key_tuples(
req, 'a', 'c', None, global_ratelimit=10)[1],
('ratelimit/global-write/a', 10))
req.method = 'PUT'
self.assertEqual(len(the_app.get_ratelimitable_key_tuples(
req, 'a', 'c', None, global_ratelimit='notafloat')), 1)
def test_memcached_container_info_dict(self):
mdict = headers_to_container_info({'x-container-object-count': '45'})
self.assertEqual(mdict['object_count'], '45')
def test_ratelimit_old_memcache_format(self):
current_rate = 13
conf_dict = {'account_ratelimit': current_rate,
'container_ratelimit_3': 200}
fake_memcache = FakeMemcache()
fake_memcache.store[get_container_memcache_key('a', 'c')] = \
{'container_size': 5}
the_app = ratelimit.filter_factory(conf_dict)(FakeApp())
the_app.memcache_client = fake_memcache
req = lambda: None
req.method = 'PUT'
req.environ = {'PATH_INFO': '/v1/a/c/o', 'swift.cache': fake_memcache}
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
tuples = the_app.get_ratelimitable_key_tuples(req, 'a', 'c', 'o')
self.assertEqual(tuples, [('ratelimit/a/c', 200.0)])
def test_account_ratelimit(self):
current_rate = 5
num_calls = 50
conf_dict = {'account_ratelimit': current_rate}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
ratelimit.http_connect = mock_http_connect(204)
with mock.patch('swift.common.middleware.ratelimit.get_container_info',
lambda *args, **kwargs: {}):
with mock.patch(
'swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
for meth, exp_time in [('DELETE', 9.8), ('GET', 0),
('POST', 0), ('PUT', 9.8)]:
req = Request.blank('/v/a%s/c' % meth)
req.method = meth
req.environ['swift.cache'] = FakeMemcache()
make_app_call = lambda: self.test_ratelimit(req.environ,
start_response)
begin = time.time()
self._run(make_app_call, num_calls, current_rate,
check_time=bool(exp_time))
self.assertEqual(round(time.time() - begin, 1), exp_time)
self._reset_time()
def test_ratelimit_set_incr(self):
current_rate = 5
num_calls = 50
conf_dict = {'account_ratelimit': current_rate}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
ratelimit.http_connect = mock_http_connect(204)
req = Request.blank('/v/a/c')
req.method = 'PUT'
req.environ['swift.cache'] = FakeMemcache()
req.environ['swift.cache'].init_incr_return_neg = True
make_app_call = lambda: self.test_ratelimit(req.environ,
start_response)
begin = time.time()
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
self._run(make_app_call, num_calls, current_rate, check_time=False)
self.assertEqual(round(time.time() - begin, 1), 9.8)
def test_ratelimit_old_white_black_list(self):
global time_ticker
current_rate = 2
conf_dict = {'account_ratelimit': current_rate,
'max_sleep_time_seconds': 2,
'account_whitelist': 'a',
'account_blacklist': 'b'}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
req = Request.blank('/')
with mock.patch.object(self.test_ratelimit,
'memcache_client', FakeMemcache()):
self.assertEqual(
self.test_ratelimit.handle_ratelimit(req, 'a', 'c', 'o'),
None)
self.assertEqual(
self.test_ratelimit.handle_ratelimit(
req, 'b', 'c', 'o').status_int,
497)
def test_ratelimit_whitelist_sysmeta(self):
global time_ticker
current_rate = 2
conf_dict = {'account_ratelimit': current_rate,
'max_sleep_time_seconds': 2,
'account_whitelist': 'a',
'account_blacklist': 'b'}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
ratelimit.http_connect = mock_http_connect(204)
req = Request.blank('/v/a/c')
req.environ['swift.cache'] = FakeMemcache()
class rate_caller(Thread):
def __init__(self, parent):
Thread.__init__(self)
self.parent = parent
def run(self):
self.result = self.parent.test_ratelimit(req.environ,
start_response)
def get_fake_ratelimit(*args, **kwargs):
return {'sysmeta': {'global-write-ratelimit': 'WHITELIST'}}
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
get_fake_ratelimit):
nt = 5
threads = []
for i in range(nt):
rc = rate_caller(self)
rc.start()
threads.append(rc)
for thread in threads:
thread.join()
the_498s = [
t for t in threads
if ''.join(t.result).startswith('Slow down')]
self.assertEqual(len(the_498s), 0)
self.assertEqual(time_ticker, 0)
def test_ratelimit_blacklist(self):
global time_ticker
current_rate = 2
conf_dict = {'account_ratelimit': current_rate,
'max_sleep_time_seconds': 2,
'account_whitelist': 'a',
'account_blacklist': 'b'}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
self.test_ratelimit.logger = FakeLogger()
self.test_ratelimit.BLACK_LIST_SLEEP = 0
ratelimit.http_connect = mock_http_connect(204)
req = Request.blank('/v/b/c')
req.environ['swift.cache'] = FakeMemcache()
class rate_caller(Thread):
def __init__(self, parent):
Thread.__init__(self)
self.parent = parent
def run(self):
self.result = self.parent.test_ratelimit(req.environ,
start_response)
def get_fake_ratelimit(*args, **kwargs):
return {'sysmeta': {'global-write-ratelimit': 'BLACKLIST'}}
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
get_fake_ratelimit):
nt = 5
threads = []
for i in range(nt):
rc = rate_caller(self)
rc.start()
threads.append(rc)
for thread in threads:
thread.join()
the_497s = [
t for t in threads
if ''.join(t.result).startswith('Your account')]
self.assertEqual(len(the_497s), 5)
self.assertEqual(time_ticker, 0)
def test_ratelimit_max_rate_double(self):
global time_ticker
global time_override
current_rate = 2
conf_dict = {'account_ratelimit': current_rate,
'clock_accuracy': 100,
'max_sleep_time_seconds': 1}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
ratelimit.http_connect = mock_http_connect(204)
self.test_ratelimit.log_sleep_time_seconds = .00001
req = Request.blank('/v/a/c')
req.method = 'PUT'
req.environ['swift.cache'] = FakeMemcache()
time_override = [0, 0, 0, 0, None]
# simulates 4 requests coming in at same time, then sleeping
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
r = self.test_ratelimit(req.environ, start_response)
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], 'Slow down')
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], 'Slow down')
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], '204 No Content')
def test_ratelimit_max_rate_double_container(self):
global time_ticker
global time_override
current_rate = 2
conf_dict = {'container_ratelimit_0': current_rate,
'clock_accuracy': 100,
'max_sleep_time_seconds': 1}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
ratelimit.http_connect = mock_http_connect(204)
self.test_ratelimit.log_sleep_time_seconds = .00001
req = Request.blank('/v/a/c/o')
req.method = 'PUT'
req.environ['swift.cache'] = FakeMemcache()
req.environ['swift.cache'].set(
get_container_memcache_key('a', 'c'),
{'container_size': 1})
time_override = [0, 0, 0, 0, None]
# simulates 4 requests coming in at same time, then sleeping
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
r = self.test_ratelimit(req.environ, start_response)
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], 'Slow down')
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], 'Slow down')
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], '204 No Content')
def test_ratelimit_max_rate_double_container_listing(self):
global time_ticker
global time_override
current_rate = 2
conf_dict = {'container_listing_ratelimit_0': current_rate,
'clock_accuracy': 100,
'max_sleep_time_seconds': 1}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
ratelimit.http_connect = mock_http_connect(204)
self.test_ratelimit.log_sleep_time_seconds = .00001
req = Request.blank('/v/a/c')
req.method = 'GET'
req.environ['swift.cache'] = FakeMemcache()
req.environ['swift.cache'].set(
get_container_memcache_key('a', 'c'),
{'container_size': 1})
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
time_override = [0, 0, 0, 0, None]
# simulates 4 requests coming in at same time, then sleeping
r = self.test_ratelimit(req.environ, start_response)
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], 'Slow down')
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], 'Slow down')
mock_sleep(.1)
r = self.test_ratelimit(req.environ, start_response)
self.assertEqual(r[0], '204 No Content')
mc = self.test_ratelimit.memcache_client
try:
self.test_ratelimit.memcache_client = None
self.assertEqual(
self.test_ratelimit.handle_ratelimit(req, 'n', 'c', None),
None)
finally:
self.test_ratelimit.memcache_client = mc
def test_ratelimit_max_rate_multiple_acc(self):
num_calls = 4
current_rate = 2
conf_dict = {'account_ratelimit': current_rate,
'max_sleep_time_seconds': 2}
fake_memcache = FakeMemcache()
the_app = ratelimit.filter_factory(conf_dict)(FakeApp())
the_app.memcache_client = fake_memcache
req = lambda: None
req.method = 'PUT'
req.environ = {}
class rate_caller(Thread):
def __init__(self, name):
self.myname = name
Thread.__init__(self)
def run(self):
for j in range(num_calls):
self.result = the_app.handle_ratelimit(req, self.myname,
'c', None)
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
nt = 15
begin = time.time()
threads = []
for i in range(nt):
rc = rate_caller('a%s' % i)
rc.start()
threads.append(rc)
for thread in threads:
thread.join()
time_took = time.time() - begin
self.assertEqual(1.5, round(time_took, 1))
def test_call_invalid_path(self):
env = {'REQUEST_METHOD': 'GET',
'SCRIPT_NAME': '',
'PATH_INFO': '//v1/AUTH_1234567890',
'SERVER_NAME': '127.0.0.1',
'SERVER_PORT': '80',
'swift.cache': FakeMemcache(),
'SERVER_PROTOCOL': 'HTTP/1.0'}
app = lambda *args, **kwargs: ['fake_app']
rate_mid = ratelimit.filter_factory({})(app)
class a_callable(object):
def __call__(self, *args, **kwargs):
pass
resp = rate_mid.__call__(env, a_callable())
self.assertTrue('fake_app' == resp[0])
def test_no_memcache(self):
current_rate = 13
num_calls = 5
conf_dict = {'account_ratelimit': current_rate}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
ratelimit.http_connect = mock_http_connect(204)
req = Request.blank('/v/a')
req.environ['swift.cache'] = None
make_app_call = lambda: self.test_ratelimit(req.environ,
start_response)
begin = time.time()
self._run(make_app_call, num_calls, current_rate, check_time=False)
time_took = time.time() - begin
self.assertEqual(round(time_took, 1), 0) # no memcache, no limiting
def test_restarting_memcache(self):
current_rate = 2
num_calls = 5
conf_dict = {'account_ratelimit': current_rate}
self.test_ratelimit = ratelimit.filter_factory(conf_dict)(FakeApp())
ratelimit.http_connect = mock_http_connect(204)
req = Request.blank('/v/a/c')
req.method = 'PUT'
req.environ['swift.cache'] = FakeMemcache()
req.environ['swift.cache'].error_on_incr = True
make_app_call = lambda: self.test_ratelimit(req.environ,
start_response)
begin = time.time()
with mock.patch('swift.common.middleware.ratelimit.get_account_info',
lambda *args, **kwargs: {}):
self._run(make_app_call, num_calls, current_rate, check_time=False)
time_took = time.time() - begin
self.assertEqual(round(time_took, 1), 0) # no memcache, no limit
class TestSwiftInfo(unittest.TestCase):
def setUp(self):
utils._swift_info = {}
utils._swift_admin_info = {}
def test_registered_defaults(self):
def check_key_is_absnet(key):
try:
swift_info[key]
except KeyError as err:
if key not in err:
raise
test_limits = {'account_ratelimit': 1,
'max_sleep_time_seconds': 60,
'container_ratelimit_0': 0,
'container_ratelimit_10': 10,
'container_ratelimit_50': 50,
'container_listing_ratelimit_0': 0,
'container_listing_ratelimit_10': 10,
'container_listing_ratelimit_50': 50}
ratelimit.filter_factory(test_limits)('have to pass in an app')
swift_info = utils.get_swift_info()
self.assertTrue('ratelimit' in swift_info)
self.assertEqual(swift_info['ratelimit']
['account_ratelimit'], 1.0)
self.assertEqual(swift_info['ratelimit']
['max_sleep_time_seconds'], 60.0)
self.assertEqual(swift_info['ratelimit']
['container_ratelimits'][0][0], 0)
self.assertEqual(swift_info['ratelimit']
['container_ratelimits'][0][1], 0.0)
self.assertEqual(swift_info['ratelimit']
['container_ratelimits'][1][0], 10)
self.assertEqual(swift_info['ratelimit']
['container_ratelimits'][1][1], 10.0)
self.assertEqual(swift_info['ratelimit']
['container_ratelimits'][2][0], 50)
self.assertEqual(swift_info['ratelimit']
['container_ratelimits'][2][1], 50.0)
self.assertEqual(swift_info['ratelimit']
['container_listing_ratelimits'][0][0], 0)
self.assertEqual(swift_info['ratelimit']
['container_listing_ratelimits'][0][1], 0.0)
self.assertEqual(swift_info['ratelimit']
['container_listing_ratelimits'][1][0], 10)
self.assertEqual(swift_info['ratelimit']
['container_listing_ratelimits'][1][1], 10.0)
self.assertEqual(swift_info['ratelimit']
['container_listing_ratelimits'][2][0], 50)
self.assertEqual(swift_info['ratelimit']
['container_listing_ratelimits'][2][1], 50.0)
# these were left out on purpose
for key in ['log_sleep_time_seconds', 'clock_accuracy',
'rate_buffer_seconds', 'ratelimit_whitelis',
'ratelimit_blacklist']:
check_key_is_absnet(key)
if __name__ == '__main__':
unittest.main()