c2dc3dc78e
This provides a basic LVM support to dib-block-device. Co-Authored-By: Ian Wienand <iwienand@redhat.com> Change-Id: Ibd624d9f95ee68b20a15891f639ddd5b3188cdf9
462 lines
19 KiB
Python
462 lines
19 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import copy
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import logging
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import mock
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import diskimage_builder.block_device.tests.test_config as tc
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from diskimage_builder.block_device.blockdevice import BlockDeviceState
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from diskimage_builder.block_device.config import config_tree_to_graph
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from diskimage_builder.block_device.config import create_graph
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from diskimage_builder.block_device.exception import \
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BlockDeviceSetupException
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from diskimage_builder.block_device.level1.lvm import LVMNode
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from diskimage_builder.block_device.level1.lvm import LVMPlugin
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from diskimage_builder.block_device.level1.lvm import LvsNode
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from diskimage_builder.block_device.level1.lvm import PvsNode
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from diskimage_builder.block_device.level1.lvm import VgsNode
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logger = logging.getLogger(__name__)
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class TestLVM(tc.TestGraphGeneration):
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def test_lvm_tree_to_graph(self):
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# equivalence of tree-based to graph-based config
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tree = self.load_config_file('lvm_tree.yaml')
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graph = self.load_config_file('lvm_graph.yaml')
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parsed_graph = config_tree_to_graph(tree)
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self.assertItemsEqual(parsed_graph, graph)
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def test_lvm_invalid_config(self):
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# test some invalid config paths
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config = self.load_config_file('lvm_graph.yaml')
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lvm_config = config[2]['lvm']
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bad_config = copy.deepcopy(lvm_config)
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bad_config['vgs'][0]['base'] = ['invalid_pv']
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self.assertRaisesRegex(BlockDeviceSetupException,
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"base:invalid_pv in vgs does not match "
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"a valid pvs",
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LVMPlugin, bad_config, {}, {})
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bad_config = copy.deepcopy(lvm_config)
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bad_config['lvs'][0]['base'] = ['invalid_vg']
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self.assertRaisesRegex(BlockDeviceSetupException,
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"base:\['invalid_vg'\] in lvs does not match "
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"a valid vg",
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LVMPlugin, bad_config, {}, {})
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bad_config = copy.deepcopy(lvm_config)
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del(bad_config['lvs'][0]['size'])
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self.assertRaisesRegex(BlockDeviceSetupException,
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"Missing 'size' or 'extents' in lvs config",
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LVMPlugin, bad_config, {}, {})
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@mock.patch('diskimage_builder.block_device.level1.lvm.exec_sudo')
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def test_lvm_multi_pv(self, mock_exec_sudo):
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# Test the command-sequence for a more complicated LVM setup
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tree = self.load_config_file('lvm_tree_multiple_pv.yaml')
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config = config_tree_to_graph(tree)
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state = BlockDeviceState()
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graph, call_order = create_graph(config, self.fake_default_config,
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state)
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# XXX: todo; test call_order. Make sure PV's come before, VG;
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# VG before LV, and that mounts/etc happen afterwards.
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# Fake state for the two PV's specified by this config
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state['blockdev'] = {}
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state['blockdev']['root'] = {}
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state['blockdev']['root']['device'] = '/dev/fake/root'
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state['blockdev']['data'] = {}
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state['blockdev']['data']['device'] = '/dev/fake/data'
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for node in call_order:
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# XXX: This has not mocked out the "lower" layers of
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# creating the devices, which we're assuming works OK, nor
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# the upper layers.
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if isinstance(node, (LVMNode, PvsNode, VgsNode, LvsNode)):
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# only the LVMNode actually does anything here...
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node.create()
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# ensure the sequence of calls correctly setup the devices
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cmd_sequence = [
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# create the pv's on the faked out block devices
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mock.call(['pvcreate', '/dev/fake/root', '--force']),
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mock.call(['pvcreate', '/dev/fake/data', '--force']),
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# create a volume called "vg" out of these two pv's
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mock.call(['vgcreate', 'vg',
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'/dev/fake/root', '/dev/fake/data', '--force']),
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# create a bunch of lv's on vg
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mock.call(['lvcreate', '--name', 'lv_root', '-L', '1800M', 'vg']),
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mock.call(['lvcreate', '--name', 'lv_tmp', '-L', '100M', 'vg']),
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mock.call(['lvcreate', '--name', 'lv_var', '-L', '500M', 'vg']),
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mock.call(['lvcreate', '--name', 'lv_log', '-L', '100M', 'vg']),
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mock.call(['lvcreate', '--name', 'lv_audit', '-L', '100M', 'vg']),
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mock.call(['lvcreate', '--name', 'lv_home', '-L', '200M', 'vg'])]
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self.assertEqual(mock_exec_sudo.call_count, len(cmd_sequence))
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mock_exec_sudo.assert_has_calls(cmd_sequence)
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# Ensure the correct LVM state was preserved
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blockdev_state = {
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'data': {'device': '/dev/fake/data'},
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'root': {'device': '/dev/fake/root'},
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'lv_audit': {
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'device': '/dev/mapper/vg-lv_audit',
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'extents': None,
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'opts': None,
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'size': '100M',
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'vgs': 'vg'
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},
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'lv_home': {
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'device': '/dev/mapper/vg-lv_home',
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'extents': None,
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'opts': None,
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'size': '200M',
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'vgs': 'vg'
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},
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'lv_log': {
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'device': '/dev/mapper/vg-lv_log',
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'extents': None,
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'opts': None,
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'size': '100M',
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'vgs': 'vg'
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},
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'lv_root': {
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'device': '/dev/mapper/vg-lv_root',
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'extents': None,
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'opts': None,
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'size': '1800M',
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'vgs': 'vg'
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},
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'lv_tmp': {
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'device': '/dev/mapper/vg-lv_tmp',
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'extents': None,
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'opts': None,
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'size': '100M',
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'vgs': 'vg'
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},
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'lv_var': {
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'device': '/dev/mapper/vg-lv_var',
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'extents': None,
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'opts': None,
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'size': '500M',
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'vgs': 'vg'
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},
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}
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# state.debug_dump()
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self.assertDictEqual(state['blockdev'], blockdev_state)
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# XXX: mount ordering? fs creation?
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def test_lvm_multi_pv_vg(self):
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# Test the command-sequence for a more complicated LVM setup
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tree = self.load_config_file('lvm_tree_multiple_pv_vg.yaml')
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config = config_tree_to_graph(tree)
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state = BlockDeviceState()
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graph, call_order = create_graph(config, self.fake_default_config,
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state)
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# XXX: todo; test call_order. Make sure PV's come before, VG;
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# VG before LV, and that mounts/etc happen afterwards.
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# Fake state for the two PV's specified by this config
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state['blockdev'] = {}
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state['blockdev']['root'] = {}
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state['blockdev']['root']['device'] = '/dev/fake/root'
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state['blockdev']['data'] = {}
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state['blockdev']['data']['device'] = '/dev/fake/data'
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# We mock patch this ... it's just a little long!
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exec_sudo = 'diskimage_builder.block_device.level1.lvm.exec_sudo'
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#
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# Creation test
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#
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with mock.patch(exec_sudo) as mock_exec_sudo:
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for node in call_order:
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# XXX: This has not mocked out the "lower" layers of
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# creating the devices, which we're assuming works OK, nor
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# the upper layers.
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if isinstance(node, (LVMNode, PvsNode, VgsNode, LvsNode)):
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# only the PvsNode actually does anything here...
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node.create()
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# ensure the sequence of calls correctly setup the devices
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cmd_sequence = [
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# create the pv's on the faked out block devices
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mock.call(['pvcreate', '/dev/fake/root', '--force']),
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mock.call(['pvcreate', '/dev/fake/data', '--force']),
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# create a volume called "vg" out of these two pv's
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mock.call(['vgcreate', 'vg1',
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'/dev/fake/root', '--force']),
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mock.call(['vgcreate', 'vg2',
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'/dev/fake/data', '--force']),
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# create a bunch of lv's on vg
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mock.call(['lvcreate', '--name', 'lv_root',
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'-L', '1800M', 'vg1']),
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mock.call(['lvcreate', '--name', 'lv_tmp',
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'-L', '100M', 'vg1']),
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mock.call(['lvcreate', '--name', 'lv_var',
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'-L', '500M', 'vg2']),
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mock.call(['lvcreate', '--name', 'lv_log',
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'-L', '100M', 'vg2']),
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mock.call(['lvcreate', '--name', 'lv_audit',
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'-L', '100M', 'vg2']),
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mock.call(['lvcreate', '--name', 'lv_home',
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'-L', '200M', 'vg2'])]
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self.assertListEqual(mock_exec_sudo.call_args_list,
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cmd_sequence)
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# Ensure the correct LVM state was preserved
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blockdev_state = {
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'data': {'device': '/dev/fake/data'},
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'root': {'device': '/dev/fake/root'},
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'lv_audit': {
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'device': '/dev/mapper/vg2-lv_audit',
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'extents': None,
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'opts': None,
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'size': '100M',
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'vgs': 'vg2'
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},
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'lv_home': {
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'device': '/dev/mapper/vg2-lv_home',
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'extents': None,
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'opts': None,
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'size': '200M',
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'vgs': 'vg2'
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},
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'lv_log': {
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'device': '/dev/mapper/vg2-lv_log',
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'extents': None,
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'opts': None,
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'size': '100M',
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'vgs': 'vg2'
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},
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'lv_root': {
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'device': '/dev/mapper/vg1-lv_root',
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'extents': None,
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'opts': None,
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'size': '1800M',
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'vgs': 'vg1'
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},
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'lv_tmp': {
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'device': '/dev/mapper/vg1-lv_tmp',
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'extents': None,
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'opts': None,
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'size': '100M',
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'vgs': 'vg1'
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},
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'lv_var': {
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'device': '/dev/mapper/vg2-lv_var',
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'extents': None,
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'opts': None,
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'size': '500M',
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'vgs': 'vg2'
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},
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}
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# state.debug_dump()
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self.assertDictEqual(state['blockdev'], blockdev_state)
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#
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# Cleanup test
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#
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with mock.patch(exec_sudo) as mock_exec_sudo, \
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mock.patch('tempfile.NamedTemporaryFile') as mock_temp, \
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mock.patch('os.unlink'):
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# each call to tempfile.NamedTemporaryFile will return a
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# new mock with a unique filename, which we store in
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# tempfiles
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tempfiles = []
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def new_tempfile(*args, **kwargs):
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n = '/tmp/files%s' % len(tempfiles)
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# trap! note mock.Mock(name = n) doesn't work like you
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# think it would, since mock has a name attribute.
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# That's why we override it with the configure_mock
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# (this is mentioned in mock documentation if you read
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# it :)
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r = mock.Mock()
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r.configure_mock(name=n)
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tempfiles.append(n)
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return r
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mock_temp.side_effect = new_tempfile
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reverse_order = reversed(call_order)
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for node in reverse_order:
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if isinstance(node, (LVMNode, PvsNode, VgsNode, LvsNode)):
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node.cleanup()
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cmd_sequence = [
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# copy the temporary drives
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mock.call(['dd', 'if=/dev/fake/root', 'of=%s' % tempfiles[0]]),
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mock.call(['dd', 'if=/dev/fake/data', 'of=%s' % tempfiles[1]]),
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# delete the lv's
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mock.call(['lvchange', '-an', '/dev/vg1/lv_root']),
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mock.call(['lvremove', '--force', '/dev/vg1/lv_root']),
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mock.call(['lvchange', '-an', '/dev/vg1/lv_tmp']),
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mock.call(['lvremove', '--force', '/dev/vg1/lv_tmp']),
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mock.call(['lvchange', '-an', '/dev/vg2/lv_var']),
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mock.call(['lvremove', '--force', '/dev/vg2/lv_var']),
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mock.call(['lvchange', '-an', '/dev/vg2/lv_log']),
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mock.call(['lvremove', '--force', '/dev/vg2/lv_log']),
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mock.call(['lvchange', '-an', '/dev/vg2/lv_audit']),
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mock.call(['lvremove', '--force', '/dev/vg2/lv_audit']),
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mock.call(['lvchange', '-an', '/dev/vg2/lv_home']),
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mock.call(['lvremove', '--force', '/dev/vg2/lv_home']),
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# delete the vg's
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mock.call(['vgchange', '-an', 'vg1']),
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mock.call(['vgremove', '--force', 'vg1']),
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mock.call(['vgchange', '-an', 'vg2']),
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mock.call(['vgremove', '--force', 'vg2']),
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# delete the pv's
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mock.call(['pvremove', '--force', '/dev/fake/root']),
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mock.call(['pvremove', '--force', '/dev/fake/data']),
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# copy back again
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mock.call(['udevadm', 'settle']),
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mock.call(['dd', 'if=%s' % tempfiles[0], 'of=/dev/fake/root']),
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mock.call(['dd', 'if=%s' % tempfiles[1], 'of=/dev/fake/data']),
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]
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self.assertListEqual(mock_exec_sudo.call_args_list, cmd_sequence)
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def test_lvm_spanned_vg(self):
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# Test when a volume group spans some partitions
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tree = self.load_config_file('lvm_tree_spanned_vg.yaml')
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config = config_tree_to_graph(tree)
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state = BlockDeviceState()
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graph, call_order = create_graph(config, self.fake_default_config,
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state)
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# XXX: todo; test call_order. Make sure PV's come before, VG;
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# VG before LV, and that mounts/etc happen afterwards.
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# Fake state for the two PV's specified by this config
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state['blockdev'] = {}
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state['blockdev']['root'] = {}
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state['blockdev']['root']['device'] = '/dev/fake/root'
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state['blockdev']['data1'] = {}
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state['blockdev']['data1']['device'] = '/dev/fake/data1'
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state['blockdev']['data2'] = {}
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state['blockdev']['data2']['device'] = '/dev/fake/data2'
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# We mock patch this ... it's just a little long!
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exec_sudo = 'diskimage_builder.block_device.level1.lvm.exec_sudo'
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#
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# Creation test
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#
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with mock.patch(exec_sudo) as mock_exec_sudo:
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for node in call_order:
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# XXX: This has not mocked out the "lower" layers of
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# creating the devices, which we're assuming works OK, nor
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# the upper layers.
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if isinstance(node, (LVMNode, PvsNode, VgsNode, LvsNode)):
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# only the LVMNode actually does anything here...
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node.create()
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# ensure the sequence of calls correctly setup the devices
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cmd_sequence = [
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# create the pv's on the faked out block devices
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mock.call(['pvcreate', '/dev/fake/root', '--force']),
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mock.call(['pvcreate', '/dev/fake/data1', '--force']),
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mock.call(['pvcreate', '/dev/fake/data2', '--force']),
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# create a root and a data volume, with the data volume
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# spanning data1 & data2
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mock.call(['vgcreate', 'vg_root',
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'/dev/fake/root', '--force']),
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mock.call(['vgcreate', 'vg_data',
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'/dev/fake/data1', '/dev/fake/data2', '--force']),
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# create root and data volume
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mock.call(['lvcreate', '--name', 'lv_root',
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'-L', '1800M', 'vg_root']),
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mock.call(['lvcreate', '--name', 'lv_data',
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'-L', '2G', 'vg_data'])
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]
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self.assertListEqual(mock_exec_sudo.call_args_list,
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cmd_sequence)
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with mock.patch(exec_sudo) as mock_exec_sudo, \
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mock.patch('tempfile.NamedTemporaryFile') as mock_temp, \
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mock.patch('os.unlink'):
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# see above ...
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tempfiles = []
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def new_tempfile(*args, **kwargs):
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n = '/tmp/files%s' % len(tempfiles)
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r = mock.Mock()
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r.configure_mock(name=n)
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tempfiles.append(n)
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return r
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mock_temp.side_effect = new_tempfile
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reverse_order = reversed(call_order)
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for node in reverse_order:
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if isinstance(node, (LVMNode, PvsNode, VgsNode, LvsNode)):
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node.cleanup()
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cmd_sequence = [
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# copy the temporary drives
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mock.call(['dd', 'if=/dev/fake/root',
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'of=%s' % tempfiles[0]]),
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mock.call(['dd', 'if=/dev/fake/data1',
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'of=%s' % tempfiles[1]]),
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mock.call(['dd', 'if=/dev/fake/data2',
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'of=%s' % tempfiles[2]]),
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# remove lv's
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mock.call(['lvchange', '-an', '/dev/vg_root/lv_root']),
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mock.call(['lvremove', '--force', '/dev/vg_root/lv_root']),
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mock.call(['lvchange', '-an', '/dev/vg_data/lv_data']),
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mock.call(['lvremove', '--force', '/dev/vg_data/lv_data']),
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# remove vg's
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mock.call(['vgchange', '-an', 'vg_root']),
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mock.call(['vgremove', '--force', 'vg_root']),
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mock.call(['vgchange', '-an', 'vg_data']),
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mock.call(['vgremove', '--force', 'vg_data']),
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# remove pv's
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mock.call(['pvremove', '--force', '/dev/fake/root']),
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mock.call(['pvremove', '--force', '/dev/fake/data1']),
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mock.call(['pvremove', '--force', '/dev/fake/data2']),
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# copy back again
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mock.call(['udevadm', 'settle']),
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mock.call(['dd', 'if=%s' % tempfiles[0],
|
|
'of=/dev/fake/root']),
|
|
mock.call(['dd', 'if=%s' % tempfiles[1],
|
|
'of=/dev/fake/data1']),
|
|
mock.call(['dd', 'if=%s' % tempfiles[2],
|
|
'of=/dev/fake/data2']),
|
|
]
|
|
|
|
self.assertListEqual(mock_exec_sudo.call_args_list, cmd_sequence)
|