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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2011 Isaku Yamahata
# 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.
"""
Tests for Block Device utility functions.
"""
from nova import block_device
from nova import exception
from nova import test
from nova.tests import matchers
class BlockDeviceTestCase(test.NoDBTestCase):
def test_properties(self):
root_device0 = '/dev/sda'
root_device1 = '/dev/sdb'
mappings = [{'virtual': 'root',
'device': root_device0}]
properties0 = {'mappings': mappings}
properties1 = {'mappings': mappings,
'root_device_name': root_device1}
self.assertEqual(block_device.properties_root_device_name({}), None)
self.assertEqual(
block_device.properties_root_device_name(properties0),
root_device0)
self.assertEqual(
block_device.properties_root_device_name(properties1),
root_device1)
def test_ephemeral(self):
self.assertFalse(block_device.is_ephemeral('ephemeral'))
self.assertTrue(block_device.is_ephemeral('ephemeral0'))
self.assertTrue(block_device.is_ephemeral('ephemeral1'))
self.assertTrue(block_device.is_ephemeral('ephemeral11'))
self.assertFalse(block_device.is_ephemeral('root'))
self.assertFalse(block_device.is_ephemeral('swap'))
self.assertFalse(block_device.is_ephemeral('/dev/sda1'))
self.assertEqual(block_device.ephemeral_num('ephemeral0'), 0)
self.assertEqual(block_device.ephemeral_num('ephemeral1'), 1)
self.assertEqual(block_device.ephemeral_num('ephemeral11'), 11)
self.assertFalse(block_device.is_swap_or_ephemeral('ephemeral'))
self.assertTrue(block_device.is_swap_or_ephemeral('ephemeral0'))
self.assertTrue(block_device.is_swap_or_ephemeral('ephemeral1'))
self.assertTrue(block_device.is_swap_or_ephemeral('swap'))
self.assertFalse(block_device.is_swap_or_ephemeral('root'))
self.assertFalse(block_device.is_swap_or_ephemeral('/dev/sda1'))
def test_mappings_prepend_dev(self):
mapping = [
{'virtual': 'ami', 'device': '/dev/sda'},
{'virtual': 'root', 'device': 'sda'},
{'virtual': 'ephemeral0', 'device': 'sdb'},
{'virtual': 'swap', 'device': 'sdc'},
{'virtual': 'ephemeral1', 'device': 'sdd'},
{'virtual': 'ephemeral2', 'device': 'sde'}]
expected = [
{'virtual': 'ami', 'device': '/dev/sda'},
{'virtual': 'root', 'device': 'sda'},
{'virtual': 'ephemeral0', 'device': '/dev/sdb'},
{'virtual': 'swap', 'device': '/dev/sdc'},
{'virtual': 'ephemeral1', 'device': '/dev/sdd'},
{'virtual': 'ephemeral2', 'device': '/dev/sde'}]
prepended = block_device.mappings_prepend_dev(mapping)
self.assertEqual(prepended.sort(), expected.sort())
def test_strip_dev(self):
self.assertEqual(block_device.strip_dev('/dev/sda'), 'sda')
self.assertEqual(block_device.strip_dev('sda'), 'sda')
def test_strip_prefix(self):
self.assertEqual(block_device.strip_prefix('/dev/sda'), 'a')
self.assertEqual(block_device.strip_prefix('a'), 'a')
self.assertEqual(block_device.strip_prefix('xvda'), 'a')
self.assertEqual(block_device.strip_prefix('vda'), 'a')
def test_volume_in_mapping(self):
swap = {'device_name': '/dev/sdb',
'swap_size': 1}
ephemerals = [{'num': 0,
'virtual_name': 'ephemeral0',
'device_name': '/dev/sdc1',
'size': 1},
{'num': 2,
'virtual_name': 'ephemeral2',
'device_name': '/dev/sdd',
'size': 1}]
block_device_mapping = [{'mount_device': '/dev/sde',
'device_path': 'fake_device'},
{'mount_device': '/dev/sdf',
'device_path': 'fake_device'}]
block_device_info = {
'root_device_name': '/dev/sda',
'swap': swap,
'ephemerals': ephemerals,
'block_device_mapping': block_device_mapping}
def _assert_volume_in_mapping(device_name, true_or_false):
in_mapping = block_device.volume_in_mapping(
device_name, block_device_info)
self.assertEquals(in_mapping, true_or_false)
_assert_volume_in_mapping('sda', False)
_assert_volume_in_mapping('sdb', True)
_assert_volume_in_mapping('sdc1', True)
_assert_volume_in_mapping('sdd', True)
_assert_volume_in_mapping('sde', True)
_assert_volume_in_mapping('sdf', True)
_assert_volume_in_mapping('sdg', False)
_assert_volume_in_mapping('sdh1', False)
class TestBlockDeviceDict(test.NoDBTestCase):
def setUp(self):
super(TestBlockDeviceDict, self).setUp()
BDM = block_device.BlockDeviceDict
self.api_mapping = [
{'id': 1, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sdb1',
'source_type': 'blank',
'destination_type': 'local',
'delete_on_termination': True,
'guest_format': 'swap',
'boot_index': -1},
{'id': 2, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sdc1',
'source_type': 'blank',
'destination_type': 'local',
'delete_on_termination': True,
'boot_index': -1},
{'id': 3, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda1',
'source_type': 'volume',
'destination_type': 'volume',
'uuid': 'fake-volume-id-1',
'boot_index': 0},
{'id': 4, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda2',
'source_type': 'snapshot',
'destination_type': 'volume',
'uuid': 'fake-snapshot-id-1',
'boot_index': -1},
{'id': 5, 'instance_uuid': 'fake-instance',
'no_device': True,
'device_name': '/dev/vdc'},
]
self.new_mapping = [
BDM({'id': 1, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sdb1',
'source_type': 'blank',
'destination_type': 'local',
'delete_on_termination': True,
'guest_format': 'swap',
'boot_index': -1}),
BDM({'id': 2, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sdc1',
'source_type': 'blank',
'destination_type': 'local',
'delete_on_termination': True,
'boot_index': -1}),
BDM({'id': 3, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda1',
'source_type': 'volume',
'destination_type': 'volume',
'volume_id': 'fake-volume-id-1',
'connection_info': "{'fake': 'connection_info'}",
'boot_index': 0}),
BDM({'id': 4, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda2',
'source_type': 'snapshot',
'destination_type': 'volume',
'connection_info': "{'fake': 'connection_info'}",
'snapshot_id': 'fake-snapshot-id-1',
'volume_id': 'fake-volume-id-2',
'boot_index': -1}),
BDM({'id': 5, 'instance_uuid': 'fake-instance',
'no_device': True,
'device_name': '/dev/vdc'}),
]
self.legacy_mapping = [
{'id': 1, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sdb1',
'delete_on_termination': True,
'virtual_name': 'swap'},
{'id': 2, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sdc1',
'delete_on_termination': True,
'virtual_name': 'ephemeral0'},
{'id': 3, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda1',
'volume_id': 'fake-volume-id-1',
'connection_info': "{'fake': 'connection_info'}"},
{'id': 4, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda2',
'connection_info': "{'fake': 'connection_info'}",
'snapshot_id': 'fake-snapshot-id-1',
'volume_id': 'fake-volume-id-2'},
{'id': 5, 'instance_uuid': 'fake-instance',
'no_device': True,
'device_name': '/dev/vdc'},
]
self.new_mapping_source_image = [
BDM({'id': 6, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda3',
'source_type': 'image',
'destination_type': 'volume',
'connection_info': "{'fake': 'connection_info'}",
'volume_id': 'fake-volume-id-3',
'boot_index': -1}),
BDM({'id': 7, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda4',
'source_type': 'image',
'destination_type': 'local',
'connection_info': "{'fake': 'connection_info'}",
'image_id': 'fake-image-id-2',
'boot_index': -1}),
]
self.legacy_mapping_source_image = [
{'id': 6, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sda3',
'connection_info': "{'fake': 'connection_info'}",
'volume_id': 'fake-volume-id-3'},
]
def test_init(self):
def fake_validate(obj, dct):
pass
self.stubs.Set(block_device.BlockDeviceDict, '_fields',
set(['field1', 'field2']))
self.stubs.Set(block_device.BlockDeviceDict, '_db_only_fields',
set(['db_field1', 'db_field2']))
self.stubs.Set(block_device.BlockDeviceDict, '_validate',
fake_validate)
# Make sure db fields are not picked up if they are not
# in the original dict
dev_dict = block_device.BlockDeviceDict({'field1': 'foo',
'field2': 'bar',
'db_field1': 'baz'})
self.assertTrue('field1' in dev_dict)
self.assertTrue('field2' in dev_dict)
self.assertTrue('db_field1' in dev_dict)
self.assertFalse('db_field2'in dev_dict)
# Make sure all expected fields are defaulted
dev_dict = block_device.BlockDeviceDict({'field1': 'foo'})
self.assertTrue('field1' in dev_dict)
self.assertTrue('field2' in dev_dict)
self.assertTrue(dev_dict['field2'] is None)
self.assertFalse('db_field1' in dev_dict)
self.assertFalse('db_field2'in dev_dict)
# Unless they are not meant to be
dev_dict = block_device.BlockDeviceDict({'field1': 'foo'},
do_not_default=set(['field2']))
self.assertTrue('field1' in dev_dict)
self.assertFalse('field2' in dev_dict)
self.assertFalse('db_field1' in dev_dict)
self.assertFalse('db_field2'in dev_dict)
def test_validate(self):
self.assertRaises(exception.InvalidBDMFormat,
block_device.BlockDeviceDict,
{'bogus_field': 'lame_val'})
lame_bdm = dict(self.new_mapping[2])
del lame_bdm['source_type']
self.assertRaises(exception.InvalidBDMFormat,
block_device.BlockDeviceDict,
lame_bdm)
lame_bdm['no_device'] = True
block_device.BlockDeviceDict(lame_bdm)
lame_dev_bdm = dict(self.new_mapping[2])
lame_dev_bdm['device_name'] = "not a valid name"
self.assertRaises(exception.InvalidBDMFormat,
block_device.BlockDeviceDict,
lame_dev_bdm)
lame_dev_bdm['device_name'] = ""
self.assertRaises(exception.InvalidBDMFormat,
block_device.BlockDeviceDict,
lame_dev_bdm)
cool_volume_size_bdm = dict(self.new_mapping[2])
cool_volume_size_bdm['volume_size'] = '42'
cool_volume_size_bdm = block_device.BlockDeviceDict(
cool_volume_size_bdm)
self.assertEquals(cool_volume_size_bdm['volume_size'], 42)
lame_volume_size_bdm = dict(self.new_mapping[2])
lame_volume_size_bdm['volume_size'] = 'some_non_int_string'
self.assertRaises(exception.InvalidBDMFormat,
block_device.BlockDeviceDict,
lame_volume_size_bdm)
truthy_bdm = dict(self.new_mapping[2])
truthy_bdm['delete_on_termination'] = '1'
truthy_bdm = block_device.BlockDeviceDict(truthy_bdm)
self.assertEquals(truthy_bdm['delete_on_termination'], True)
verbose_bdm = dict(self.new_mapping[2])
verbose_bdm['boot_index'] = 'first'
self.assertRaises(exception.InvalidBDMFormat,
block_device.BlockDeviceDict,
verbose_bdm)
def test_from_legacy(self):
for legacy, new in zip(self.legacy_mapping, self.new_mapping):
self.assertThat(
block_device.BlockDeviceDict.from_legacy(legacy),
matchers.IsSubDictOf(new))
def test_from_legacy_mapping(self):
def _get_image_bdms(bdms):
return [bdm for bdm in bdms if bdm['source_type'] == 'image']
def _get_bootable_bdms(bdms):
return [bdm for bdm in bdms if bdm['boot_index'] >= 0]
new_no_img = block_device.from_legacy_mapping(self.legacy_mapping)
self.assertEquals(len(_get_image_bdms(new_no_img)), 0)
for new, expected in zip(new_no_img, self.new_mapping):
self.assertThat(new, matchers.IsSubDictOf(expected))
new_with_img = block_device.from_legacy_mapping(
self.legacy_mapping, 'fake_image_ref')
image_bdms = _get_image_bdms(new_with_img)
boot_bdms = _get_bootable_bdms(new_with_img)
self.assertEquals(len(image_bdms), 1)
self.assertEquals(len(boot_bdms), 1)
self.assertEquals(image_bdms[0]['boot_index'], 0)
self.assertEquals(boot_bdms[0]['source_type'], 'image')
new_with_img_and_root = block_device.from_legacy_mapping(
self.legacy_mapping, 'fake_image_ref', 'sda1')
image_bdms = _get_image_bdms(new_with_img_and_root)
boot_bdms = _get_bootable_bdms(new_with_img_and_root)
self.assertEquals(len(image_bdms), 0)
self.assertEquals(len(boot_bdms), 1)
self.assertEquals(boot_bdms[0]['boot_index'], 0)
self.assertEquals(boot_bdms[0]['source_type'], 'volume')
def test_from_api(self):
for api, new in zip(self.api_mapping, self.new_mapping):
new['connection_info'] = None
if new['snapshot_id']:
new['volume_id'] = None
self.assertThat(
block_device.BlockDeviceDict.from_api(api),
matchers.IsSubDictOf(new))
def test_legacy(self):
for legacy, new in zip(self.legacy_mapping, self.new_mapping):
self.assertThat(
legacy,
matchers.IsSubDictOf(new.legacy()))
def test_legacy_mapping(self):
got_legacy = block_device.legacy_mapping(self.new_mapping)
for legacy, expected in zip(got_legacy, self.legacy_mapping):
self.assertThat(expected, matchers.IsSubDictOf(legacy))
def test_legacy_source_image(self):
for legacy, new in zip(self.legacy_mapping_source_image,
self.new_mapping_source_image):
if new['destination_type'] == 'volume':
self.assertThat(legacy, matchers.IsSubDictOf(new.legacy()))
else:
self.assertRaises(exception.InvalidBDMForLegacy, new.legacy)
def test_legacy_mapping_source_image(self):
got_legacy = block_device.legacy_mapping(self.new_mapping)
for legacy, expected in zip(got_legacy, self.legacy_mapping):
self.assertThat(expected, matchers.IsSubDictOf(legacy))
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