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# Copyright 2012 NTT Data. All Rights Reserved.
# Copyright 2012 Yahoo! Inc. 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.
from unittest import mock
from oslo_concurrency import processutils
from oslo_config import cfg
from oslo_utils import units
from nova import exception
from nova import test
from nova.virt.libvirt.storage import lvm
CONF = cfg.CONF
class LvmTestCase(test.NoDBTestCase):
@mock.patch('nova.privsep.fs.blockdev_size')
def test_get_volume_size(self, mock_blockdev_size):
mock_blockdev_size.return_value = '123456789', None
size = lvm.get_volume_size('/dev/foo')
self.assertEqual(123456789, size)
@mock.patch('nova.privsep.fs.blockdev_size',
side_effect=processutils.ProcessExecutionError(
stderr=('blockdev: cannot open /dev/foo: '
'No such device or address')))
def test_get_volume_size_not_found(self, mock_blockdev_size):
self.assertRaises(exception.VolumeBDMPathNotFound,
lvm.get_volume_size, '/dev/foo')
@mock.patch('nova.privsep.fs.blockdev_size',
side_effect=processutils.ProcessExecutionError(
stderr=('blockdev: cannot open /dev/foo: '
'No such file or directory')))
def test_get_volume_size_not_found_file(self, mock_blockdev_size):
self.assertRaises(exception.VolumeBDMPathNotFound,
lvm.get_volume_size, '/dev/foo')
@mock.patch('os.path.exists', return_value=True)
@mock.patch('nova.privsep.fs.blockdev_size',
side_effect=processutils.ProcessExecutionError(
stderr='blockdev: i am sad in other ways'))
def test_get_volume_size_unexpected_error(self, mock_blockdev_size,
mock_path_exists):
self.assertRaises(processutils.ProcessExecutionError,
lvm.get_volume_size, '/dev/foo')
@mock.patch('nova.privsep.fs.clear')
def test_lvm_clear(self, mock_clear):
def fake_lvm_size(path):
return lvm_size
self.stub_out('nova.virt.libvirt.storage.lvm.get_volume_size',
fake_lvm_size)
# Test zeroing volumes works
CONF.set_override('volume_clear', 'zero', 'libvirt')
lvm_size = 1024
lvm.clear_volume('/dev/v1')
mock_clear.assert_has_calls([
mock.call('/dev/v1', 1024, shred=False)])
mock_clear.reset_mock()
# Test volume_clear_size limits the size
lvm_size = 10485761
CONF.set_override('volume_clear_size', '1', 'libvirt')
lvm.clear_volume('/dev/v7')
mock_clear.assert_has_calls(
[mock.call('/dev/v7', 1048576, shred=False)])
mock_clear.reset_mock()
CONF.set_override('volume_clear_size', '2', 'libvirt')
lvm_size = 1048576
lvm.clear_volume('/dev/v9')
mock_clear.assert_has_calls(
[mock.call('/dev/v9', 1048576, shred=False)])
mock_clear.reset_mock()
# Test volume_clear=shred
CONF.set_override('volume_clear', 'shred', 'libvirt')
CONF.set_override('volume_clear_size', '0', 'libvirt')
lvm_size = 1048576
lvm.clear_volume('/dev/va')
mock_clear.assert_has_calls([
mock.call('/dev/va', 1048576, shred=True)])
mock_clear.reset_mock()
CONF.set_override('volume_clear', 'shred', 'libvirt')
CONF.set_override('volume_clear_size', '1', 'libvirt')
lvm_size = 10485761
lvm.clear_volume('/dev/vb')
mock_clear.assert_has_calls([
mock.call('/dev/vb', 1 * units.Mi, shred=True)])
mock_clear.reset_mock()
# Test volume_clear=none does nothing
CONF.set_override('volume_clear', 'none', 'libvirt')
lvm.clear_volume('/dev/vc')
mock_clear.assert_not_called()
@mock.patch('nova.privsep.fs.blockdev_size',
side_effect=processutils.ProcessExecutionError(
stderr=('blockdev: cannot open /dev/foo: '
'No such file or directory')))
def test_lvm_clear_ignore_lvm_not_found(self, mock_blockdev_size):
lvm.clear_volume('/dev/foo')
@mock.patch.object(lvm, 'clear_volume')
@mock.patch('nova.privsep.fs.lvremove',
side_effect=processutils.ProcessExecutionError('Error'))
def test_fail_remove_all_logical_volumes(self, mock_clear, mock_lvremove):
self.assertRaises(exception.VolumesNotRemoved,
lvm.remove_volumes,
['vol1', 'vol2', 'vol3'])
self.assertEqual(3, mock_lvremove.call_count)
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