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|
# Copyright 2013 OpenStack Foundation
# All Rights Reserved.
#
# 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 hashlib
from unittest import mock
from oslo_utils.secretutils import md5
from oslo_utils import units
import six
from glance_store._drivers import rbd as rbd_store
from glance_store import exceptions
from glance_store import location as g_location
from glance_store.tests import base
from glance_store.tests.unit import test_store_capabilities
from glance_store.tests import utils as test_utils
class TestException(Exception):
pass
class MockRados(object):
class Error(Exception):
pass
class ObjectNotFound(Exception):
pass
class ioctx(object):
def __init__(self, *args, **kwargs):
pass
def __enter__(self, *args, **kwargs):
return self
def __exit__(self, *args, **kwargs):
return False
def close(self, *args, **kwargs):
pass
class Rados(object):
def __init__(self, *args, **kwargs):
pass
def __enter__(self, *args, **kwargs):
return self
def __exit__(self, *args, **kwargs):
return False
def connect(self, *args, **kwargs):
pass
def open_ioctx(self, *args, **kwargs):
return MockRados.ioctx()
def shutdown(self, *args, **kwargs):
pass
def conf_get(self, *args, **kwargs):
pass
class MockRBD(object):
class ImageExists(Exception):
pass
class ImageHasSnapshots(Exception):
pass
class ImageBusy(Exception):
pass
class ImageNotFound(Exception):
pass
class InvalidArgument(Exception):
pass
class NoSpace(Exception):
pass
class Image(object):
def __init__(self, *args, **kwargs):
pass
def __enter__(self, *args, **kwargs):
return self
def __exit__(self, *args, **kwargs):
pass
def create_snap(self, *args, **kwargs):
pass
def remove_snap(self, *args, **kwargs):
pass
def protect_snap(self, *args, **kwargs):
pass
def unprotect_snap(self, *args, **kwargs):
pass
def read(self, *args, **kwargs):
raise NotImplementedError()
def write(self, *args, **kwargs):
raise NotImplementedError()
def resize(self, *args, **kwargs):
pass
def discard(self, offset, length):
raise NotImplementedError()
def close(self):
pass
def list_snaps(self):
raise NotImplementedError()
def parent_info(self):
raise NotImplementedError()
def size(self):
raise NotImplementedError()
class RBD(object):
def __init__(self, *args, **kwargs):
pass
def __enter__(self, *args, **kwargs):
return self
def __exit__(self, *args, **kwargs):
return False
def create(self, *args, **kwargs):
pass
def remove(self, *args, **kwargs):
pass
def list(self, *args, **kwargs):
raise NotImplementedError()
def clone(self, *args, **kwargs):
raise NotImplementedError()
RBD_FEATURE_LAYERING = 1
class TestReSize(base.StoreBaseTest,
test_store_capabilities.TestStoreCapabilitiesChecking):
def setUp(self):
"""Establish a clean test environment."""
super(TestReSize, self).setUp()
rbd_store.rados = MockRados
rbd_store.rbd = MockRBD
self.store = rbd_store.Store(self.conf)
self.store.configure()
self.store_specs = {'pool': 'fake_pool',
'image': 'fake_image',
'snapshot': 'fake_snapshot'}
self.location = rbd_store.StoreLocation(self.store_specs,
self.conf)
self.hash_algo = 'sha256'
def test_add_w_image_size_zero_less_resizes(self):
"""Assert that correct size is returned even though 0 was provided."""
data_len = 57 * units.Mi
data_iter = test_utils.FakeData(data_len)
with mock.patch.object(rbd_store.rbd.Image, 'resize') as resize:
with mock.patch.object(rbd_store.rbd.Image, 'write') as write:
ret = self.store.add(
'fake_image_id', data_iter, 0, self.hash_algo)
# We expect to trim at the end so +1
expected = 1
expected_calls = []
data_len_temp = data_len
resize_amount = self.store.WRITE_CHUNKSIZE
while data_len_temp > 0:
expected_calls.append(resize_amount + (data_len -
data_len_temp))
data_len_temp -= resize_amount
resize_amount *= 2
expected += 1
self.assertEqual(expected, resize.call_count)
resize.assert_has_calls([mock.call(call) for call in
expected_calls])
expected = ([self.store.WRITE_CHUNKSIZE for i in range(int(
data_len / self.store.WRITE_CHUNKSIZE))] +
[(data_len % self.store.WRITE_CHUNKSIZE)])
actual = ([len(args[0]) for args, kwargs in
write.call_args_list])
self.assertEqual(expected, actual)
self.assertEqual(data_len,
resize.call_args_list[-1][0][0])
self.assertEqual(data_len, ret[1])
def test_resize_on_write_ceiling(self):
image = mock.MagicMock()
# image, size, written, chunk
# Non-zero image size means no resize
ret = self.store._resize_on_write(image, 32, 16, 16)
self.assertEqual(0, ret)
image.resize.assert_not_called()
# Current size is smaller than we need
self.store.size = 8
ret = self.store._resize_on_write(image, 0, 16, 16)
self.assertEqual(8 + self.store.WRITE_CHUNKSIZE, ret)
self.assertEqual(self.store.WRITE_CHUNKSIZE * 2,
self.store.resize_amount)
image.resize.assert_called_once_with(ret)
# More reads under the limit do not require a resize
image.resize.reset_mock()
self.store.size = ret
ret = self.store._resize_on_write(image, 0, 64, 16)
self.assertEqual(8 + self.store.WRITE_CHUNKSIZE, ret)
image.resize.assert_not_called()
# Read past the limit triggers another resize
ret = self.store._resize_on_write(image, 0, ret + 1, 16)
self.assertEqual(8 + self.store.WRITE_CHUNKSIZE * 3, ret)
image.resize.assert_called_once_with(ret)
self.assertEqual(self.store.WRITE_CHUNKSIZE * 4,
self.store.resize_amount)
# Check that we do not resize past the 8G ceiling.
# Start with resize_amount at 4G, 1G read so far
image.resize.reset_mock()
self.store.resize_amount = 4 * units.Gi
self.store.size = 1 * units.Gi
# First resize happens and we get the 4G,
# resize_amount goes to limit of 8G
ret = self.store._resize_on_write(image, 0, 4097 * units.Mi, 16)
self.assertEqual(5 * units.Gi, ret)
self.assertEqual(8 * units.Gi, self.store.resize_amount)
self.store.size = ret
# Second resize happens and we get to 13G,
# resize amount stays at limit of 8G
ret = self.store._resize_on_write(image, 0, 6144 * units.Mi, 16)
self.assertEqual((5 + 8) * units.Gi, ret)
self.assertEqual(8 * units.Gi, self.store.resize_amount)
self.store.size = ret
# Third resize happens and we get to 21G,
# resize amount stays at limit of 8G
ret = self.store._resize_on_write(image, 0, 14336 * units.Mi, 16)
self.assertEqual((5 + 8 + 8) * units.Gi, ret)
self.assertEqual(8 * units.Gi, self.store.resize_amount)
image.resize.assert_has_calls([
mock.call(5 * units.Gi),
mock.call(13 * units.Gi),
mock.call(21 * units.Gi)])
class TestStore(base.StoreBaseTest,
test_store_capabilities.TestStoreCapabilitiesChecking):
def setUp(self):
"""Establish a clean test environment."""
super(TestStore, self).setUp()
rbd_store.rados = MockRados
rbd_store.rbd = MockRBD
self.store = rbd_store.Store(self.conf)
self.store.configure()
self.store.chunk_size = 2
self.called_commands_actual = []
self.called_commands_expected = []
self.store_specs = {'pool': 'fake_pool',
'image': 'fake_image',
'snapshot': 'fake_snapshot'}
self.location = rbd_store.StoreLocation(self.store_specs,
self.conf)
# Provide enough data to get more than one chunk iteration.
self.data_len = 3 * units.Ki
self.data_iter = six.BytesIO(b'*' * self.data_len)
self.hash_algo = 'sha256'
def test_thin_provisioning_is_disabled_by_default(self):
self.assertEqual(self.store.thin_provisioning, False)
def test_add_w_image_size_zero(self):
"""Assert that correct size is returned even though 0 was provided."""
self.store.chunk_size = units.Ki
with mock.patch.object(rbd_store.rbd.Image, 'resize') as resize:
with mock.patch.object(rbd_store.rbd.Image, 'write') as write:
ret = self.store.add(
'fake_image_id', self.data_iter, 0, self.hash_algo)
self.assertTrue(resize.called)
self.assertTrue(write.called)
self.assertEqual(ret[1], self.data_len)
@mock.patch.object(MockRBD.Image, '__enter__')
@mock.patch.object(rbd_store.Store, '_create_image')
@mock.patch.object(rbd_store.Store, '_delete_image')
def test_add_w_rbd_image_exception(self, delete, create, enter):
def _fake_create_image(*args, **kwargs):
self.called_commands_actual.append('create')
return self.location
def _fake_delete_image(target_pool, image_name, snapshot_name=None):
self.assertEqual(self.location.pool, target_pool)
self.assertEqual(self.location.image, image_name)
self.assertEqual(self.location.snapshot, snapshot_name)
self.called_commands_actual.append('delete')
def _fake_enter(*args, **kwargs):
raise exceptions.NotFound(image="fake_image_id")
create.side_effect = _fake_create_image
delete.side_effect = _fake_delete_image
enter.side_effect = _fake_enter
self.assertRaises(exceptions.NotFound,
self.store.add,
'fake_image_id', self.data_iter, self.data_len,
self.hash_algo)
self.called_commands_expected = ['create', 'delete']
@mock.patch.object(MockRBD.Image, 'resize')
@mock.patch.object(rbd_store.Store, '_create_image')
@mock.patch.object(rbd_store.Store, '_delete_image')
def test_add_w_rbd_no_space_exception(self, delete, create, resize):
def _fake_create_image(*args, **kwargs):
self.called_commands_actual.append('create')
return self.location
def _fake_delete_image(target_pool, image_name, snapshot_name=None):
self.assertEqual(self.location.pool, target_pool)
self.assertEqual(self.location.image, image_name)
self.assertEqual(self.location.snapshot, snapshot_name)
self.called_commands_actual.append('delete')
def _fake_resize(*args, **kwargs):
raise MockRBD.NoSpace()
create.side_effect = _fake_create_image
delete.side_effect = _fake_delete_image
resize.side_effect = _fake_resize
self.assertRaises(exceptions.StorageFull,
self.store.add,
'fake_image_id', self.data_iter, 0,
self.hash_algo)
self.called_commands_expected = ['create', 'delete']
def test_add_duplicate_image(self):
def _fake_create_image(*args, **kwargs):
self.called_commands_actual.append('create')
raise MockRBD.ImageExists()
with mock.patch.object(self.store, '_create_image') as create_image:
create_image.side_effect = _fake_create_image
self.assertRaises(exceptions.Duplicate,
self.store.add,
'fake_image_id', self.data_iter, self.data_len,
self.hash_algo)
self.called_commands_expected = ['create']
def test_add_with_verifier(self):
"""Assert 'verifier.update' is called when verifier is provided."""
self.store.chunk_size = units.Ki
verifier = mock.MagicMock(name='mock_verifier')
image_id = 'fake_image_id'
file_size = 5 * units.Ki # 5K
file_contents = b"*" * file_size
image_file = six.BytesIO(file_contents)
with mock.patch.object(rbd_store.rbd.Image, 'write'):
self.store.add(image_id, image_file, file_size, self.hash_algo,
verifier=verifier)
verifier.update.assert_called_with(file_contents)
def test_add_checksums(self):
self.store.chunk_size = units.Ki
image_id = 'fake_image_id'
file_size = 5 * units.Ki # 5K
file_contents = b"*" * file_size
image_file = six.BytesIO(file_contents)
expected_checksum = md5(file_contents,
usedforsecurity=False).hexdigest()
expected_multihash = hashlib.sha256(file_contents).hexdigest()
with mock.patch.object(rbd_store.rbd.Image, 'write'):
loc, size, checksum, multihash, _ = self.store.add(
image_id, image_file, file_size, self.hash_algo)
self.assertEqual(expected_checksum, checksum)
self.assertEqual(expected_multihash, multihash)
def test_add_thick_provisioning_with_holes_in_file(self):
"""
Tests that a file which contains null bytes chunks is fully
written to rbd backend in a thick provisioning configuration.
"""
chunk_size = units.Mi
content = b"*" * chunk_size + b"\x00" * chunk_size + b"*" * chunk_size
self._do_test_thin_provisioning(content, 3 * chunk_size, 3, False)
def test_add_thin_provisioning_with_holes_in_file(self):
"""
Tests that a file which contains null bytes chunks is sparsified
in rbd backend with a thin provisioning configuration.
"""
chunk_size = units.Mi
content = b"*" * chunk_size + b"\x00" * chunk_size + b"*" * chunk_size
self._do_test_thin_provisioning(content, 3 * chunk_size, 2, True)
def test_add_thick_provisioning_without_holes_in_file(self):
"""
Tests that a file which not contain null bytes chunks is fully
written to rbd backend in a thick provisioning configuration.
"""
chunk_size = units.Mi
content = b"*" * 3 * chunk_size
self._do_test_thin_provisioning(content, 3 * chunk_size, 3, False)
def test_add_thin_provisioning_without_holes_in_file(self):
"""
Tests that a file which not contain null bytes chunks is fully
written to rbd backend in a thin provisioning configuration.
"""
chunk_size = units.Mi
content = b"*" * 3 * chunk_size
self._do_test_thin_provisioning(content, 3 * chunk_size, 3, True)
def test_add_thick_provisioning_with_partial_holes_in_file(self):
"""
Tests that a file which contains null bytes not aligned with
chunk size is fully written with a thick provisioning configuration.
"""
chunk_size = units.Mi
my_chunk = int(chunk_size * 1.5)
content = b"*" * my_chunk + b"\x00" * my_chunk + b"*" * my_chunk
self._do_test_thin_provisioning(content, 3 * my_chunk, 5, False)
def test_add_thin_provisioning_with_partial_holes_in_file(self):
"""
Tests that a file which contains null bytes not aligned with
chunk size is sparsified with a thin provisioning configuration.
"""
chunk_size = units.Mi
my_chunk = int(chunk_size * 1.5)
content = b"*" * my_chunk + b"\x00" * my_chunk + b"*" * my_chunk
self._do_test_thin_provisioning(content, 3 * my_chunk, 4, True)
def _do_test_thin_provisioning(self, content, size, write, thin):
self.config(rbd_store_chunk_size=1,
rbd_thin_provisioning=thin)
self.store.configure()
image_id = 'fake_image_id'
image_file = six.BytesIO(content)
expected_checksum = md5(content,
usedforsecurity=False).hexdigest()
expected_multihash = hashlib.sha256(content).hexdigest()
with mock.patch.object(rbd_store.rbd.Image, 'write') as mock_write:
loc, size, checksum, multihash, _ = self.store.add(
image_id, image_file, size, self.hash_algo)
self.assertEqual(mock_write.call_count, write)
self.assertEqual(expected_checksum, checksum)
self.assertEqual(expected_multihash, multihash)
def test_delete(self):
def _fake_remove(*args, **kwargs):
self.called_commands_actual.append('remove')
with mock.patch.object(MockRBD.RBD, 'remove') as remove_image:
remove_image.side_effect = _fake_remove
self.store.delete(g_location.Location('test_rbd_store',
rbd_store.StoreLocation,
self.conf,
uri=self.location.get_uri()))
self.called_commands_expected = ['remove']
def test_delete_image(self):
def _fake_remove(*args, **kwargs):
self.called_commands_actual.append('remove')
with mock.patch.object(MockRBD.RBD, 'remove') as remove_image:
remove_image.side_effect = _fake_remove
self.store._delete_image('fake_pool', self.location.image)
self.called_commands_expected = ['remove']
def test_delete_image_exc_image_not_found(self):
def _fake_remove(*args, **kwargs):
self.called_commands_actual.append('remove')
raise MockRBD.ImageNotFound()
with mock.patch.object(MockRBD.RBD, 'remove') as remove:
remove.side_effect = _fake_remove
self.assertRaises(exceptions.NotFound, self.store._delete_image,
'fake_pool', self.location.image)
self.called_commands_expected = ['remove']
@mock.patch.object(MockRBD.RBD, 'remove')
@mock.patch.object(MockRBD.Image, 'remove_snap')
@mock.patch.object(MockRBD.Image, 'unprotect_snap')
def test_delete_image_w_snap(self, unprotect, remove_snap, remove):
def _fake_unprotect_snap(*args, **kwargs):
self.called_commands_actual.append('unprotect_snap')
def _fake_remove_snap(*args, **kwargs):
self.called_commands_actual.append('remove_snap')
def _fake_remove(*args, **kwargs):
self.called_commands_actual.append('remove')
remove.side_effect = _fake_remove
unprotect.side_effect = _fake_unprotect_snap
remove_snap.side_effect = _fake_remove_snap
self.store._delete_image('fake_pool', self.location.image,
snapshot_name='snap')
self.called_commands_expected = ['unprotect_snap', 'remove_snap',
'remove']
@mock.patch.object(MockRBD.RBD, 'remove')
@mock.patch.object(MockRBD.Image, 'remove_snap')
@mock.patch.object(MockRBD.Image, 'unprotect_snap')
def test_delete_image_w_unprotected_snap(self, unprotect, remove_snap,
remove):
def _fake_unprotect_snap(*args, **kwargs):
self.called_commands_actual.append('unprotect_snap')
raise MockRBD.InvalidArgument()
def _fake_remove_snap(*args, **kwargs):
self.called_commands_actual.append('remove_snap')
def _fake_remove(*args, **kwargs):
self.called_commands_actual.append('remove')
remove.side_effect = _fake_remove
unprotect.side_effect = _fake_unprotect_snap
remove_snap.side_effect = _fake_remove_snap
self.store._delete_image('fake_pool', self.location.image,
snapshot_name='snap')
self.called_commands_expected = ['unprotect_snap', 'remove_snap',
'remove']
@mock.patch.object(MockRBD.RBD, 'remove')
@mock.patch.object(MockRBD.Image, 'remove_snap')
@mock.patch.object(MockRBD.Image, 'unprotect_snap')
def test_delete_image_w_snap_with_error(self, unprotect, remove_snap,
remove):
def _fake_unprotect_snap(*args, **kwargs):
self.called_commands_actual.append('unprotect_snap')
raise TestException()
def _fake_remove_snap(*args, **kwargs):
self.called_commands_actual.append('remove_snap')
def _fake_remove(*args, **kwargs):
self.called_commands_actual.append('remove')
remove.side_effect = _fake_remove
unprotect.side_effect = _fake_unprotect_snap
remove_snap.side_effect = _fake_remove_snap
self.assertRaises(TestException, self.store._delete_image,
'fake_pool', self.location.image,
snapshot_name='snap')
self.called_commands_expected = ['unprotect_snap']
def test_delete_image_w_snap_exc_image_busy(self):
def _fake_unprotect_snap(*args, **kwargs):
self.called_commands_actual.append('unprotect_snap')
raise MockRBD.ImageBusy()
with mock.patch.object(MockRBD.Image, 'unprotect_snap') as mocked:
mocked.side_effect = _fake_unprotect_snap
self.assertRaises(exceptions.InUseByStore,
self.store._delete_image,
'fake_pool', self.location.image,
snapshot_name='snap')
self.called_commands_expected = ['unprotect_snap']
def test_delete_image_w_snap_exc_image_has_snap(self):
def _fake_remove(*args, **kwargs):
self.called_commands_actual.append('remove')
raise MockRBD.ImageHasSnapshots()
with mock.patch.object(MockRBD.RBD, 'remove') as remove:
remove.side_effect = _fake_remove
self.assertRaises(exceptions.HasSnapshot, self.store._delete_image,
'fake_pool', self.location.image)
self.called_commands_expected = ['remove']
def test_get_partial_image(self):
loc = g_location.Location('test_rbd_store', rbd_store.StoreLocation,
self.conf, store_specs=self.store_specs)
self.assertRaises(exceptions.StoreRandomGetNotSupported,
self.store.get, loc, chunk_size=1)
@mock.patch.object(MockRados.Rados, 'connect')
def test_rados_connect_timeout(self, mock_rados_connect):
socket_timeout = 1
self.config(rados_connect_timeout=socket_timeout)
self.store.configure()
with self.store.get_connection('conffile', 'rados_id'):
mock_rados_connect.assert_called_with(timeout=socket_timeout)
@mock.patch.object(MockRados.Rados, 'connect', side_effect=MockRados.Error)
def test_rados_connect_error(self, _):
rbd_store.rados.Error = MockRados.Error
rbd_store.rados.ObjectNotFound = MockRados.ObjectNotFound
def test():
with self.store.get_connection('conffile', 'rados_id'):
pass
self.assertRaises(exceptions.BackendException, test)
def test_create_image_conf_features(self):
# Tests that we use non-0 features from ceph.conf and cast to int.
fsid = 'fake'
features = '3'
conf_get_mock = mock.Mock(return_value=features)
conn = mock.Mock(conf_get=conf_get_mock)
ioctxt = mock.sentinel.ioctxt
name = '1'
size = 1024
order = 3
with mock.patch.object(rbd_store.rbd.RBD, 'create') as create_mock:
location = self.store._create_image(
fsid, conn, ioctxt, name, size, order)
self.assertEqual(fsid, location.specs['fsid'])
self.assertEqual(rbd_store.DEFAULT_POOL, location.specs['pool'])
self.assertEqual(name, location.specs['image'])
self.assertEqual(rbd_store.DEFAULT_SNAPNAME,
location.specs['snapshot'])
create_mock.assert_called_once_with(ioctxt, name, size, order,
old_format=False, features=3)
def tearDown(self):
self.assertEqual(self.called_commands_expected,
self.called_commands_actual)
super(TestStore, self).tearDown()
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