OpenStack Storage (Swift)
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# 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
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" Swift tests """
from __future__ import print_function
import os
import copy
import logging
import sys
from contextlib import contextmanager, closing
from collections import defaultdict, Iterable
import itertools
from numbers import Number
from tempfile import NamedTemporaryFile
import time
import eventlet
from eventlet import greenpool, debug as eventlet_debug
from import socket
from tempfile import mkdtemp, mkstemp, gettempdir
from shutil import rmtree
import signal
import json
import random
import errno
import xattr
from swift.common import storage_policy, swob, utils
from swift.common.storage_policy import (StoragePolicy, ECStoragePolicy,
from swift.common.utils import Timestamp, NOTICE
from test import get_config
from swift.common.header_key_dict import HeaderKeyDict
from swift.common.ring import Ring, RingData, RingBuilder
from swift.obj import server
from hashlib import md5
import logging.handlers
import six
from six.moves import range
from six import BytesIO
from six.moves.http_client import HTTPException
import functools
import six.moves.cPickle as pickle
from gzip import GzipFile
import mock as mocklib
import inspect
import unittest
import unittest2
class SkipTest(unittest2.SkipTest, unittest.SkipTest):
EMPTY_ETAG = md5().hexdigest()
# try not to import this module from swift
if not os.path.basename(sys.argv[0]).startswith('swift'):
utils.HASH_PATH_SUFFIX = b'endcap'
for eclib_name in EC_TYPE_PREFERENCE:
if eclib_name in VALID_EC_TYPES:
raise SystemExit('ERROR: unable to find suitable PyECLib type'
' (none of %r found in %r)' % (
def patch_policies(thing_or_policies=None, legacy_only=False,
with_ec_default=False, fake_ring_args=None):
if isinstance(thing_or_policies, (
Iterable, storage_policy.StoragePolicyCollection)):
return PatchPolicies(thing_or_policies, fake_ring_args=fake_ring_args)
if legacy_only:
default_policies = [
StoragePolicy(0, name='legacy', is_default=True),
default_ring_args = [{}]
elif with_ec_default:
default_policies = [
ECStoragePolicy(0, name='ec', is_default=True,
ec_type=DEFAULT_TEST_EC_TYPE, ec_ndata=10,
ec_nparity=4, ec_segment_size=4096),
StoragePolicy(1, name='unu'),
default_ring_args = [{'replicas': 14}, {}]
default_policies = [
StoragePolicy(0, name='nulo', is_default=True),
StoragePolicy(1, name='unu'),
default_ring_args = [{}, {}]
fake_ring_args = fake_ring_args or default_ring_args
decorator = PatchPolicies(default_policies, fake_ring_args=fake_ring_args)
if not thing_or_policies:
return decorator
# it's a thing, we return the wrapped thing instead of the decorator
return decorator(thing_or_policies)
class PatchPolicies(object):
Why not mock.patch? In my case, when used as a decorator on the class it
seemed to patch setUp at the wrong time (i.e. in setUp the global wasn't
patched yet)
def __init__(self, policies, fake_ring_args=None):
if isinstance(policies, storage_policy.StoragePolicyCollection):
self.policies = policies
self.policies = storage_policy.StoragePolicyCollection(policies)
self.fake_ring_args = fake_ring_args or [None] * len(self.policies)
def _setup_rings(self):
Our tests tend to use the policies rings like their own personal
playground - which can be a problem in the particular case of a
patched TestCase class where the FakeRing objects are scoped in the
call to the patch_policies wrapper outside of the TestCase instance
which can lead to some bled state.
To help tests get better isolation without having to think about it,
here we're capturing the args required to *build* a new FakeRing
instances so we can ensure each test method gets a clean ring setup.
The TestCase can always "tweak" these fresh rings in setUp - or if
they'd prefer to get the same "reset" behavior with custom FakeRing's
they can pass in their own fake_ring_args to patch_policies instead of
setting the object_ring on the policy definitions.
for policy, fake_ring_arg in zip(self.policies, self.fake_ring_args):
if fake_ring_arg is not None:
policy.object_ring = FakeRing(**fake_ring_arg)
def __call__(self, thing):
if isinstance(thing, type):
return self._patch_class(thing)
return self._patch_method(thing)
def _patch_class(self, cls):
Creating a new class that inherits from decorated class is the more
common way I've seen class decorators done - but it seems to cause
infinite recursion when super is called from inside methods in the
decorated class.
orig_setUp = cls.setUp
def unpatch_cleanup(cls_self):
if cls_self._policies_patched:
cls_self._policies_patched = False
def setUp(cls_self):
if not getattr(cls_self, '_policies_patched', False):
cls_self._policies_patched = True
cls_self.addCleanup(unpatch_cleanup, cls_self)
cls.setUp = setUp
return cls
def _patch_method(self, f):
def mywrapper(*args, **kwargs):
with self:
return f(*args, **kwargs)
return mywrapper
def __enter__(self):
self._orig_POLICIES = storage_policy._POLICIES
storage_policy._POLICIES = self.policies
except: # noqa
def __exit__(self, *args):
storage_policy._POLICIES = self._orig_POLICIES
class FakeRing(Ring):
def __init__(self, replicas=3, max_more_nodes=0, part_power=0,
self._base_port = base_port
self.max_more_nodes = max_more_nodes
self._part_shift = 32 - part_power
# 9 total nodes (6 more past the initial 3) is the cap, no matter if
# this is set higher, or R^2 for R replicas
def has_changed(self):
The real implementation uses getmtime on the serialized_path attribute,
which doesn't exist on our fake and relies on the implementation of
_reload which we override. So ... just NOOPE.
return False
def _reload(self):
self._rtime = time.time()
def device_char(self):
return next(self._device_char_iter)
def _init_device_char(self):
self._device_char_iter = itertools.cycle(
['sd%s' % chr(ord('a') + x) for x in range(26)])
def add_node(self, dev):
# round trip through json to ensure unicode like real rings
def set_replicas(self, replicas):
self.replicas = replicas
self._devs = []
for x in range(self.replicas):
ip = '10.0.0.%s' % x
port = self._base_port + x
dev = {
'ip': ip,
'replication_ip': ip,
'port': port,
'replication_port': port,
'device': self.device_char,
'zone': x % 3,
'region': x % 2,
'id': x,
def replica_count(self):
return self.replicas
def _get_part_nodes(self, part):
return [dict(node, index=i) for i, node in enumerate(list(self._devs))]
def get_more_nodes(self, part):
for x in range(self.replicas, (self.replicas + self.max_more_nodes)):
yield {'ip': '10.0.0.%s' % x,
'replication_ip': '10.0.0.%s' % x,
'port': self._base_port + x,
'replication_port': self._base_port + x,
'device': 'sda',
'zone': x % 3,
'region': x % 2,
'id': x}
def write_fake_ring(path, *devs):
Pretty much just a two node, two replica, 2 part power ring...
dev1 = {'id': 0, 'zone': 0, 'device': 'sda1', 'ip': '',
'port': 6200}
dev2 = {'id': 0, 'zone': 0, 'device': 'sdb1', 'ip': '',
'port': 6200}
dev1_updates, dev2_updates = devs or ({}, {})
replica2part2dev_id = [[0, 1, 0, 1], [1, 0, 1, 0]]
devs = [dev1, dev2]
part_shift = 30
with closing(GzipFile(path, 'wb')) as f:
pickle.dump(RingData(replica2part2dev_id, devs, part_shift), f)
def write_stub_builder(tmpdir, region=1, name=''):
Pretty much just a three node, three replica, 8 part power builder...
:param tmpdir: a place to write the builder, be sure to clean it up!
:param region: an integer, fills in region and ip
:param name: the name of the builder (i.e. <name>.builder)
name = name or str(region)
replicas = 3
builder = RingBuilder(8, replicas, 1)
for i in range(replicas):
dev = {'weight': 100,
'region': '%d' % region,
'zone': '1',
'ip': '10.0.0.%d' % region,
'port': '3600',
'device': 'sdb%d' % i}
builder_file = os.path.join(tmpdir, '%s.builder' % name)
return builder, builder_file
class FabricatedRing(Ring):
When a FakeRing just won't do - you can fabricate one to meet
your tests needs.
def __init__(self, replicas=6, devices=8, nodes=4, port=6200,
self.devices = devices
self.nodes = nodes
self.port = port
self.replicas = replicas
self._part_shift = 32 - part_power
def _reload(self, *args, **kwargs):
self._rtime = time.time() * 2
if hasattr(self, '_replica2part2dev_id'):
self._devs = [{
'region': 1,
'zone': 1,
'weight': 1.0,
'id': i,
'device': 'sda%d' % i,
'ip': '10.0.0.%d' % (i % self.nodes),
'replication_ip': '10.0.0.%d' % (i % self.nodes),
'port': self.port,
'replication_port': self.port,
} for i in range(self.devices)]
self._replica2part2dev_id = [
[None] * 2 ** self.part_power
for i in range(self.replicas)
dev_ids = itertools.cycle(range(self.devices))
for p in range(2 ** self.part_power):
for r in range(self.replicas):
self._replica2part2dev_id[r][p] = next(dev_ids)
class FakeMemcache(object):
def __init__(self): = {}
def get(self, key):
def keys(self):
def set(self, key, value, time=0):[key] = value
return True
def incr(self, key, time=0):[key] =, 0) + 1
def soft_lock(self, key, timeout=0, retries=5):
yield True
def delete(self, key):
except Exception:
return True
def readuntil2crlfs(fd):
rv = b''
lc = b''
crlfs = 0
while crlfs < 2:
c =
if not c:
raise ValueError("didn't get two CRLFs; just got %r" % rv)
rv = rv + c
if c == b'\r' and lc != b'\n':
crlfs = 0
if lc == b'\r' and c == b'\n':
crlfs += 1
lc = c
return rv
def connect_tcp(hostport):
rv = socket.socket()
return rv
def tmpfile(content):
with NamedTemporaryFile('w', delete=False) as f:
file_name =
yield file_name
def temptree(files, contents=''):
# generate enough contents to fill the files
c = len(files)
contents = (list(contents) + [''] * c)[:c]
tempdir = mkdtemp()
for path, content in zip(files, contents):
if os.path.isabs(path):
path = '.' + path
new_path = os.path.join(tempdir, path)
subdir = os.path.dirname(new_path)
if not os.path.exists(subdir):
with open(new_path, 'w') as f:
yield tempdir
def with_tempdir(f):
Decorator to give a single test a tempdir as argument to test method.
def wrapped(*args, **kwargs):
tempdir = mkdtemp()
args = list(args)
return f(*args, **kwargs)
return wrapped
class NullLoggingHandler(logging.Handler):
def emit(self, record):
class UnmockTimeModule(object):
Even if a test mocks time.time - you can restore unmolested behavior in a
another module who imports time directly by monkey patching it's imported
reference to the module with an instance of this class
_orig_time = time.time
def __getattribute__(self, name):
if name == 'time':
return UnmockTimeModule._orig_time
return getattr(time, name)
# logging.LogRecord.__init__ calls time.time
logging.time = UnmockTimeModule()
class WARN_DEPRECATED(Exception):
def __init__(self, msg):
self.msg = msg
class FakeLogger(logging.Logger, object):
# a thread safe fake logger
def __init__(self, *args, **kwargs):
self._clear() = 'swift.unit.fake_logger'
self.level = logging.NOTSET
if 'facility' in kwargs:
self.facility = kwargs['facility']
self.statsd_client = None
self.thread_locals = None
self.parent = None
store_in = {
logging.ERROR: 'error',
logging.WARNING: 'warning',
logging.INFO: 'info',
logging.DEBUG: 'debug',
logging.CRITICAL: 'critical',
NOTICE: 'notice',
def warn(self, *args, **kwargs):
raise WARN_DEPRECATED("Deprecated Method warn use warning instead")
def notice(self, msg, *args, **kwargs):
Convenience function for syslog priority LOG_NOTICE. The python
logging lvl is set to 25, just above info. SysLogHandler is
monkey patched to map this log lvl to the LOG_NOTICE syslog
self.log(NOTICE, msg, *args, **kwargs)
def _log(self, level, msg, *args, **kwargs):
store_name = self.store_in[level]
cargs = [msg]
if any(args):
captured = dict(kwargs)
if 'exc_info' in kwargs and \
not isinstance(kwargs['exc_info'], tuple):
captured['exc_info'] = sys.exc_info()
self.log_dict[store_name].append((tuple(cargs), captured))
super(FakeLogger, self)._log(level, msg, *args, **kwargs)
def _clear(self):
self.log_dict = defaultdict(list)
self.lines_dict = {'critical': [], 'error': [], 'info': [],
'warning': [], 'debug': [], 'notice': []}
clear = _clear # this is a public interface
def get_lines_for_level(self, level):
if level not in self.lines_dict:
raise KeyError(
"Invalid log level '%s'; valid levels are %s" %
', '.join("'%s'" % lvl for lvl in sorted(self.lines_dict))))
return self.lines_dict[level]
def all_log_lines(self):
return dict((level, msgs) for level, msgs in self.lines_dict.items()
if len(msgs) > 0)
def _store_in(store_name):
def stub_fn(self, *args, **kwargs):
self.log_dict[store_name].append((args, kwargs))
return stub_fn
# mock out the StatsD logging methods:
update_stats = _store_in('update_stats')
increment = _store_in('increment')
decrement = _store_in('decrement')
timing = _store_in('timing')
timing_since = _store_in('timing_since')
transfer_rate = _store_in('transfer_rate')
set_statsd_prefix = _store_in('set_statsd_prefix')
def get_increments(self):
return [call[0][0] for call in self.log_dict['increment']]
def get_increment_counts(self):
counts = {}
for metric in self.get_increments():
if metric not in counts:
counts[metric] = 0
counts[metric] += 1
return counts
def setFormatter(self, obj):
self.formatter = obj
def close(self):
def set_name(self, name):
# don't touch _handlers
self._name = name
def acquire(self):
def release(self):
def createLock(self):
def emit(self, record):
def _handle(self, record):
line = record.getMessage()
except TypeError:
print('WARNING: unable to format log message %r %% %r' % (
record.msg, record.args))
def handle(self, record):
def flush(self):
def handleError(self, record):
def isEnabledFor(self, level):
return True
class DebugSwiftLogFormatter(utils.SwiftLogFormatter):
def format(self, record):
msg = super(DebugSwiftLogFormatter, self).format(record)
return msg.replace('#012', '\n')
class DebugLogger(FakeLogger):
"""A simple stdout logging version of FakeLogger"""
def __init__(self, *args, **kwargs):
FakeLogger.__init__(self, *args, **kwargs)
self.formatter = DebugSwiftLogFormatter(
"%(server)s %(levelname)s: %(message)s")
def handle(self, record):
class DebugLogAdapter(utils.LogAdapter):
def _send_to_logger(name):
def stub_fn(self, *args, **kwargs):
return getattr(self.logger, name)(*args, **kwargs)
return stub_fn
# delegate to FakeLogger's mocks
update_stats = _send_to_logger('update_stats')
increment = _send_to_logger('increment')
decrement = _send_to_logger('decrement')
timing = _send_to_logger('timing')
timing_since = _send_to_logger('timing_since')
transfer_rate = _send_to_logger('transfer_rate')
set_statsd_prefix = _send_to_logger('set_statsd_prefix')
def __getattribute__(self, name):
return object.__getattribute__(self, name)
except AttributeError:
return getattr(self.__dict__['logger'], name)
def debug_logger(name='test'):
"""get a named adapted debug logger"""
return DebugLogAdapter(DebugLogger(), name)
original_syslog_handler = logging.handlers.SysLogHandler
def fake_syslog_handler():
for attr in dir(original_syslog_handler):
if attr.startswith('LOG'):
setattr(FakeLogger, attr,
copy.copy(getattr(logging.handlers.SysLogHandler, attr)))
FakeLogger.priority_map = \
logging.handlers.SysLogHandler = FakeLogger
if utils.config_true_value(
get_config('unit_test').get('fake_syslog', 'False')):
def quiet_eventlet_exceptions():
orig_state = greenpool.DEBUG
def mock_check_drive(isdir=False, ismount=False):
All device/drive/mount checking should be done through the constraints
module. If we keep the mocking consistently within that module, we can
keep our tests robust to further rework on that interface.
Replace the constraint modules underlying os calls with mocks.
:param isdir: return value of constraints isdir calls, default False
:param ismount: return value of constraints ismount calls, default False
:returns: a dict of constraint module mocks
mock_base = 'swift.common.constraints.'
with mocklib.patch(mock_base + 'isdir') as mock_isdir, \
mocklib.patch(mock_base + 'utils.ismount') as mock_ismount:
mock_isdir.return_value = isdir
mock_ismount.return_value = ismount
yield {
'isdir': mock_isdir,
'ismount': mock_ismount,
def mock(update):
returns = []
deletes = []
for key, value in update.items():
imports = key.split('.')
attr = imports.pop(-1)
module = __import__(imports[0], fromlist=imports[1:])
for modname in imports[1:]:
module = getattr(module, modname)
if hasattr(module, attr):
returns.append((module, attr, getattr(module, attr)))
deletes.append((module, attr))
setattr(module, attr, value)
yield True
for module, attr, value in returns:
setattr(module, attr, value)
for module, attr in deletes:
delattr(module, attr)
class FakeStatus(object):
This will work with our fake_http_connect, if you hand in one of these
instead of a status int or status int tuple to the "codes" iter you can
add some eventlet sleep to the expect and response stages of the
def __init__(self, status, expect_sleep=None, response_sleep=None):
:param status: the response status int, or a tuple of
([expect_status, ...], response_status)
:param expect_sleep: float, time to eventlet sleep during expect, can
be a iter of floats
:param response_sleep: float, time to eventlet sleep during response
# connect exception
if inspect.isclass(status) and issubclass(status, Exception):
raise status('FakeStatus Error')
if isinstance(status, (Exception, eventlet.Timeout)):
raise status
if isinstance(status, tuple):
self.expect_status = list(status[:-1])
self.status = status[-1]
self.explicit_expect_list = True
self.expect_status, self.status = ([], status)
self.explicit_expect_list = False
if not self.expect_status:
# when a swift backend service returns a status before reading
# from the body (mostly an error response) eventlet.wsgi will
# respond with that status line immediately instead of 100
# Continue, even if the client sent the Expect 100 header.
# BufferedHttp and the proxy both see these error statuses
# when they call getexpect, so our FakeConn tries to act like
# our backend services and return certain types of responses
# as expect statuses just like a real backend server would do.
if self.status in (507, 412, 409):
self.expect_status = [status]
self.expect_status = [100, 100]
# setup sleep attributes
if not isinstance(expect_sleep, (list, tuple)):
expect_sleep = [expect_sleep] * len(self.expect_status)
self.expect_sleep_list = list(expect_sleep)
while len(self.expect_sleep_list) < len(self.expect_status):
self.response_sleep = response_sleep
def get_response_status(self):
if self.response_sleep is not None:
if self.expect_status and self.explicit_expect_list:
raise Exception('Test did not consume all fake '
'expect status: %r' % (self.expect_status,))
if isinstance(self.status, (Exception, eventlet.Timeout)):
raise self.status
return self.status
def get_expect_status(self):
expect_sleep = self.expect_sleep_list.pop(0)
if expect_sleep is not None:
expect_status = self.expect_status.pop(0)
if isinstance(expect_status, (Exception, eventlet.Timeout)):
raise expect_status
return expect_status
class SlowBody(object):
This will work with our fake_http_connect, if you hand in these
instead of strings it will make reads take longer by the given
amount. It should be a little bit easier to extend than the
current slow kwarg - which inserts whitespace in the response.
Also it should be easy to detect if you have one of these (or a
subclass) for the body inside of FakeConn if we wanted to do
something smarter than just duck-type the str/buffer api
enough to get by.
def __init__(self, body, slowness):
self.body = body
self.slowness = slowness
def slowdown(self):
def __getitem__(self, s):
return SlowBody(self.body[s], self.slowness)
def __len__(self):
return len(self.body)
def __radd__(self, other):
return other + self.body
def fake_http_connect(*code_iter, **kwargs):
class FakeConn(object):
def __init__(self, status, etag=None, body=b'', timestamp='1',
headers=None, expect_headers=None, connection_id=None,
give_send=None, give_expect=None):
if not isinstance(status, FakeStatus):
status = FakeStatus(status)
self._status = status
self.reason = 'Fake' = ''
self.port = '1234'
self.sent = 0
self.received = 0
self.etag = etag
self.body = body
self.headers = headers or {}
self.expect_headers = expect_headers or {}
self.timestamp = timestamp
self.connection_id = connection_id
self.give_send = give_send
self.give_expect = give_expect
self.closed = False
if 'slow' in kwargs and isinstance(kwargs['slow'], list):
self._next_sleep = kwargs['slow'].pop(0)
except IndexError:
self._next_sleep = None
# if we're going to be slow, we need a body to send slowly
am_slow, _junk = self.get_slow()
if am_slow and len(self.body) < self.SLOW_READS:
self.body += " " * (self.SLOW_READS - len(self.body))
# be nice to trixy bits with node_iter's
def getresponse(self):
exc = kwargs.get('raise_exc')
if exc:
if isinstance(exc, (Exception, eventlet.Timeout)):
raise exc
raise Exception('test')
if kwargs.get('raise_timeout_exc'):
raise eventlet.Timeout()
self.status = self._status.get_response_status()
return self
def getexpect(self):
if self.give_expect:
expect_status = self._status.get_expect_status()
headers = dict(self.expect_headers)
if expect_status == 409:
headers['X-Backend-Timestamp'] = self.timestamp
response = FakeConn(expect_status,
response.status = expect_status
return response
def getheaders(self):
etag = self.etag
if not etag:
if isinstance(self.body, six.binary_type):
etag = '"' + md5(self.body).hexdigest() + '"'
etag = '"68b329da9893e34099c7d8ad5cb9c940"'
am_slow, _junk = self.get_slow()
headers = HeaderKeyDict({
'content-length': len(self.body),
'content-type': 'x-application/test',
'x-timestamp': self.timestamp,
'x-backend-timestamp': self.timestamp,
'last-modified': self.timestamp,
'x-object-meta-test': 'testing',
'x-delete-at': '9876543210',
'etag': etag,
'x-works': 'yes',
if self.status // 100 == 2:
headers['x-account-container-count'] = \
kwargs.get('count', 12345)
if not self.timestamp:
# when timestamp is None, HeaderKeyDict raises KeyError
headers.pop('x-timestamp', None)
if next(container_ts_iter) is False:
headers['x-container-timestamp'] = '1'
except StopIteration:
return headers.items()
def get_slow(self):
if 'slow' in kwargs and isinstance(kwargs['slow'], list):
if self._next_sleep is not None:
return True, self._next_sleep
return False, 0.01
if kwargs.get('slow') and isinstance(kwargs['slow'], Number):
return True, kwargs['slow']
return bool(kwargs.get('slow')), 0.1
def read(self, amt=None):
am_slow, value = self.get_slow()
if am_slow:
if self.sent < self.SLOW_READS:
slowly_read_byte = self.body[self.sent]
self.sent += 1
return slowly_read_byte
if amt is None:
rv = self.body[self.sent:]
rv = self.body[self.sent:self.sent + amt]
self.sent += len(rv)
return rv
def send(self, data=None):
if self.give_send:
self.give_send(self, data)
am_slow, value = self.get_slow()
if am_slow:
if self.received < self.SLOW_WRITES:
self.received += 1
def getheader(self, name, default=None):
return HeaderKeyDict(self.getheaders()).get(name, default)
def close(self):
self.closed = True
timestamps_iter = iter(kwargs.get('timestamps') or ['1'] * len(code_iter))
etag_iter = iter(kwargs.get('etags') or [None] * len(code_iter))
if isinstance(kwargs.get('headers'), (list, tuple)):
headers_iter = iter(kwargs['headers'])
headers_iter = iter([kwargs.get('headers', {})] * len(code_iter))
if isinstance(kwargs.get('expect_headers'), (list, tuple)):
expect_headers_iter = iter(kwargs['expect_headers'])
expect_headers_iter = iter([kwargs.get('expect_headers', {})] *
x = kwargs.get('missing_container', [False] * len(code_iter))
if not isinstance(x, (tuple, list)):
x = [x] * len(code_iter)
container_ts_iter = iter(x)
code_iter = iter(code_iter)
conn_id_and_code_iter = enumerate(code_iter)
static_body = kwargs.get('body', None)
body_iter = kwargs.get('body_iter', None)
if body_iter:
body_iter = iter(body_iter)
unexpected_requests = []
def connect(*args, **ckwargs):
if kwargs.get('slow_connect', False):
if 'give_content_type' in kwargs:
if len(args) >= 7 and 'Content-Type' in args[6]:
i, status = next(conn_id_and_code_iter)
except StopIteration:
# the code under test may swallow the StopIteration, so by logging
# unexpected requests here we allow the test framework to check for
# them after the connect function has been used.
unexpected_requests.append((args, kwargs))
if 'give_connect' in kwargs:
give_conn_fn = kwargs['give_connect']
argspec = inspect.getargspec(give_conn_fn)
if argspec.keywords or 'connection_id' in argspec.args:
ckwargs['connection_id'] = i
give_conn_fn(*args, **ckwargs)
etag = next(etag_iter)
headers = next(headers_iter)
expect_headers = next(expect_headers_iter)
timestamp = next(timestamps_iter)
if status <= 0:
raise HTTPException()
if body_iter is None:
body = static_body or ''
body = next(body_iter)
return FakeConn(status, etag, body=body, timestamp=timestamp,
headers=headers, expect_headers=expect_headers,
connection_id=i, give_send=kwargs.get('give_send'),
connect.unexpected_requests = unexpected_requests
connect.code_iter = code_iter
return connect
def mocked_http_conn(*args, **kwargs):
requests = []
def capture_requests(ip, port, method, path, headers, qs, ssl):
req = {
'ip': ip,
'port': port,
'method': method,
'path': path,
'headers': headers,
'qs': qs,
'ssl': ssl,
kwargs.setdefault('give_connect', capture_requests)
fake_conn = fake_http_connect(*args, **kwargs)
fake_conn.requests = requests
with mocklib.patch('swift.common.bufferedhttp.http_connect_raw',
yield fake_conn
left_over_status = list(fake_conn.code_iter)
if left_over_status:
raise AssertionError('left over status %r' % left_over_status)
if fake_conn.unexpected_requests:
raise AssertionError('unexpected requests %r' %
def make_timestamp_iter(offset=0):
return iter(Timestamp(t)
for t in itertools.count(int(time.time()) + offset))
def mock_timestamp_now(now=None):
if now is None:
now =
with mocklib.patch('',
classmethod(lambda c: now)):
yield now
class Timeout(object):
def __init__(self, seconds):
self.seconds = seconds
def __enter__(self):
signal.signal(signal.SIGALRM, self._exit)
def __exit__(self, type, value, traceback):
def _exit(self, signum, frame):
class TimeoutException(Exception):
raise TimeoutException
def requires_o_tmpfile_support_in_tmp(func):
def wrapper(*args, **kwargs):
if not utils.o_tmpfile_in_tmpdir_supported():
raise SkipTest('Requires O_TMPFILE support in TMPDIR')
return func(*args, **kwargs)
return wrapper
def requires_o_tmpfile_support(func):
def wrapper(*args, **kwargs):
if not utils.o_tmpfile_supported():
raise SkipTest('Requires O_TMPFILE support')
return func(*args, **kwargs)
return wrapper
class StubResponse(object):
def __init__(self, status, body='', headers=None, frag_index=None):
self.status = status
self.body = body
self.readable = BytesIO(body)
self.headers = HeaderKeyDict(headers)
if frag_index is not None:
self.headers['X-Object-Sysmeta-Ec-Frag-Index'] = frag_index
fake_reason = ('Fake', 'This response is a lie.')
self.reason = swob.RESPONSE_REASONS.get(status, fake_reason)[0]
def getheader(self, header_name, default=None):
return self.headers.get(header_name, default)
def getheaders(self):
if 'Content-Length' not in self.headers:
self.headers['Content-Length'] = len(self.body)
return self.headers.items()
def read(self, amt=0):
def encode_frag_archive_bodies(policy, body):
Given a stub body produce a list of complete frag_archive bodies as
strings in frag_index order.
:param policy: a StoragePolicy instance, with policy_type EC_POLICY
:param body: a string, the body to encode into frag archives
:returns: list of strings, the complete frag_archive bodies for the given
segment_size = policy.ec_segment_size
# split up the body into buffers
chunks = [body[x:x + segment_size]
for x in range(0, len(body), segment_size)]
# encode the buffers into fragment payloads
fragment_payloads = []
for chunk in chunks:
fragments = policy.pyeclib_driver.encode(chunk) \
* policy.ec_duplication_factor
if not fragments:
# join up the fragment payloads per node
ec_archive_bodies = [b''.join(frags)
for frags in zip(*fragment_payloads)]
return ec_archive_bodies
def make_ec_object_stub(test_body, policy, timestamp):
segment_size = policy.ec_segment_size
test_body = test_body or (
'test' * segment_size)[:-random.randint(1, 1000)]
timestamp = timestamp or
etag = md5(test_body).hexdigest()
ec_archive_bodies = encode_frag_archive_bodies(policy, test_body)
return {
'body': test_body,
'etag': etag,
'frags': ec_archive_bodies,
'timestamp': timestamp
def fake_ec_node_response(node_frags, policy):
Given a list of entries for each node in ring order, where the entries
are a dict (or list of dicts) which describes the fragment (or
fragments) that are on the node; create a function suitable for use
with capture_http_requests that will accept a req object and return a
response that will suitably fake the behavior of an object server who
had the given fragments on disk at the time.
:param node_frags: a list. Each item in the list describes the
fragments that are on a node; each item is a dict or list of dicts,
each dict describing a single fragment; where the item is a list,
repeated calls to get_response will return fragments in the order
of the list; each dict has keys:
- obj: an object stub, as generated by _make_ec_object_stub,
that defines all of the fragments that compose an object
at a specific timestamp.
- frag: the index of a fragment to be selected from the object
- durable (optional): True if the selected fragment is durable
:param policy: storage policy to return
node_map = {} # maps node ip and port to node index
all_nodes = []
call_count = {} # maps node index to get_response call count for node
def _build_node_map(req, policy):
node_key = lambda n: (n['ip'], n['port'])
part = utils.split_path(req['path'], 5, 5, True)[1]
for i, node in enumerate(all_nodes):
node_map[node_key(node)] = i
call_count[i] = 0
# normalize node_frags to a list of fragments for each node even
# if there's only one fragment in the dataset provided.
for i, frags in enumerate(node_frags):
if isinstance(frags, dict):
node_frags[i] = [frags]
def get_response(req):
requested_policy = int(
if int(policy) != requested_policy:
"Requested polciy doesn't fit the fake response policy")
if not node_map:
_build_node_map(req, policy)
node_index = node_map[(req['ip'], req['port'])]
except KeyError:
raise Exception("Couldn't find node %s:%s in %r" % (
req['ip'], req['port'], all_nodes))
frags = node_frags[node_index]
except IndexError:
raise Exception('Found node %r:%r at index %s - '
'but only got %s stub response nodes' % (
req['ip'], req['port'], node_index,
if not frags:
return StubResponse(404)
# determine response fragment (if any) for this call
resp_frag = frags[call_count[node_index]]
call_count[node_index] += 1
frag_prefs = req['headers'].get('X-Backend-Fragment-Preferences')
if not (frag_prefs or resp_frag.get('durable', True)):
return StubResponse(404)
# prepare durable timestamp and backend frags header for this node
obj_stub = resp_frag['obj']
ts2frags = defaultdict(list)
durable_timestamp = None
for frag in frags:
ts_frag = frag['obj']['timestamp']
if frag.get('durable', True):
durable_timestamp = ts_frag.internal
body = obj_stub['frags'][resp_frag['frag']]
except IndexError as err:
raise Exception(
'Frag index %s not defined: node index %s, frags %r\n%s' %
(resp_frag['frag'], node_index, [f['frag'] for f in frags],
headers = {
'X-Object-Sysmeta-Ec-Content-Length': len(obj_stub['body']),
'X-Object-Sysmeta-Ec-Etag': obj_stub['etag'],
'X-Backend-Timestamp': obj_stub['timestamp'].internal,
'X-Timestamp': obj_stub['timestamp'].normal,
'X-Backend-Data-Timestamp': obj_stub['timestamp'].internal,
if durable_timestamp:
headers['X-Backend-Durable-Timestamp'] = durable_timestamp
return StubResponse(200, body, headers)
return get_response
supports_xattr_cached_val = None
def xattr_supported_check():
This check simply sets more than 4k of metadata on a tempfile and
returns True if it worked and False if not.
We want to use *more* than 4k of metadata in this check because
some filesystems (eg ext4) only allow one blocksize worth of
metadata. The XFS filesystem doesn't have this limit, and so this
check returns True when TMPDIR is XFS. This check will return
False under ext4 (which supports xattrs <= 4k) and tmpfs (which
doesn't support xattrs at all).
global supports_xattr_cached_val
if supports_xattr_cached_val is not None:
return supports_xattr_cached_val
# assume the worst -- xattrs aren't supported
supports_xattr_cached_val = False
big_val = b'x' * (4096 + 1) # more than 4k of metadata
fd, tmppath = mkstemp()
xattr.setxattr(fd, 'user.swift.testing_key', big_val)
except IOError as e:
if errno.errorcode.get(e.errno) in ('ENOSPC', 'ENOTSUP', 'EOPNOTSUPP'):
# filesystem does not support xattr of this size
return False
supports_xattr_cached_val = True
return True
# clean up the tmpfile
def skip_if_no_xattrs():
if not xattr_supported_check():
raise SkipTest('Large xattrs not supported in `%s`. Skipping test' %
def unlink_files(paths):
for path in paths:
except OSError as err:
if err.errno != errno.ENOENT:
class FakeHTTPResponse(object):
def __init__(self, resp):
self.resp = resp
def status(self):
return self.resp.status_int
def data(self):
return self.resp.body
def attach_fake_replication_rpc(rpc, replicate_hook=None, errors=None):
class FakeReplConnection(object):
def __init__(self, node, partition, hash_, logger):
self.logger = logger
self.node = node
self.partition = partition
self.path = '/%s/%s/%s' % (node['device'], partition, hash_) = node['replication_ip']
def replicate(self, op, *sync_args):
print('REPLICATE: %s, %s, %r' % (self.path, op, sync_args))
resp = None
if errors and op in errors and errors[op]:
resp = errors[op].pop(0)
if not resp:
replicate_args = self.path.lstrip('/').split('/')
args = [op] + copy.deepcopy(list(sync_args))
with mock_check_drive(isdir=not rpc.mount_check,
swob_response = rpc.dispatch(replicate_args, args)
resp = FakeHTTPResponse(swob_response)
if replicate_hook:
replicate_hook(op, *sync_args)
return resp
return FakeReplConnection