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devicefactory_test.py
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devicefactory_test.py
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import unittest
from decimal import Decimal
import os
import blivet
from blivet import devicefactory
from blivet.devicelibs import raid
from blivet.devices import DiskDevice
from blivet.devices import DiskFile
from blivet.devices import LUKSDevice
from blivet.devices import LVMLogicalVolumeDevice
from blivet.devices import LVMThinLogicalVolumeDevice
from blivet.devices import MDRaidArrayDevice
from blivet.devices import PartitionDevice
from blivet.errors import RaidError
from blivet.formats import get_format
from blivet.size import Size
from blivet.util import create_sparse_tempfile
"""
Things we're still not testing:
- catches not enough disks for specified raid level
- container
- defined
- existing
- fixed, max, normal size
Ideas that came up while working on this:
- add properties to factory classes indicating relevance/support of
various options (container_*, encrypted come to mind)
"""
class DeviceFactoryTestCase(unittest.TestCase):
device_type = None
""" device type constant to pass to devicefactory.get_device_factory """
device_class = None
""" device class to expect from devicefactory """
encryption_supported = True
""" whether encryption of this device type is supported by blivet """
def setUp(self):
if self.device_type is None:
raise unittest.SkipTest("abstract base class")
self.b = blivet.Blivet() # don't populate it
self.disk_files = [create_sparse_tempfile("factorytest", Size("1 GiB")),
create_sparse_tempfile("factorytest", Size("1 GiB"))]
for filename in self.disk_files:
disk = DiskFile(filename)
self.b.devicetree._add_device(disk)
self.b.initialize_disk(disk)
self.addCleanup(self._clean_up_disk_files)
def _clean_up_disk_files(self):
for fn in self.disk_files:
os.unlink(fn)
def _factory_device(self, *args, **kwargs):
""" Run the device factory and return the device it produces. """
factory = devicefactory.get_device_factory(self.b,
*args, **kwargs)
factory.configure()
return factory.device
def _validate_factory_device(self, *args, **kwargs):
""" Validate the factory device against the factory args. """
device = args[0]
device_type = args[1]
size = args[2]
if kwargs.get("encrypted"):
device_class = LUKSDevice
else:
device_class = self.device_class
self.assertIsInstance(device, device_class)
self.assertEqual(devicefactory.get_device_type(device), device_type)
self.assertEqual(device.format.type, kwargs['fstype'])
if hasattr(device.format, "mountpoint"):
self.assertEqual(device.format.mountpoint,
kwargs.get('mountpoint'))
if hasattr(device.format, "label"):
self.assertEqual(device.format.label,
kwargs.get('label'))
self.assertLessEqual(device.size, size)
self.assertGreaterEqual(device.size, device.format.min_size)
if device.format.max_size:
self.assertLessEqual(device.size, device.format.max_size)
self.assertEqual(device.encrypted,
kwargs.get("encrypted", False) or
kwargs.get("container_encrypted", False))
self.assertTrue(set(device.disks).issubset(kwargs["disks"]))
def test_device_factory(self):
device_type = self.device_type
size = Size('400 MiB')
kwargs = {"disks": self.b.disks,
"fstype": 'ext4',
"mountpoint": '/factorytest'}
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
self.b.recursive_remove(device)
if self.encryption_supported:
# Encrypt the leaf device
kwargs["encrypted"] = True
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
for partition in self.b.partitions:
self.b.recursive_remove(partition)
##
# Reconfigure device
##
# Create a basic stack
size = Size('800 MiB')
kwargs = {"disks": self.b.disks,
"fstype": 'ext4',
"mountpoint": '/factorytest'}
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
if self.encryption_supported:
# Encrypt the leaf device
kwargs["encrypted"] = True
kwargs["device"] = device
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
# Change the mountpoint
kwargs["mountpoint"] = "/a/different/dir"
kwargs["device"] = device
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
# Change the fstype and size.
kwargs["fstype"] = "xfs"
kwargs["device"] = device
size = Size("650 MiB")
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
def _get_test_factory_args(self):
""" Return kwarg dict of type-specific factory ctor args. """
return dict()
# pylint: disable=unused-argument
def _get_size_delta(self, devices=None):
""" Return size delta for a specific factory type.
:keyword devices: list of factory-managed devices or None
:type devices: list(:class:`blivet.devices.StorageDevice`) or NoneType
"""
return Size("1 MiB")
def test_get_free_disk_space(self):
# get_free_disk_space should return the total free space on disks
kwargs = self._get_test_factory_args()
size = Size("500 MiB")
factory = devicefactory.get_device_factory(self.b,
self.device_type,
size,
disks=self.b.disks,
**kwargs)
# disks contain empty disklabels, so free space is sum of disk sizes
self.assertAlmostEqual(factory._get_free_disk_space(),
sum(d.size for d in self.b.disks),
delta=self._get_size_delta())
factory.configure()
device = factory.device
device_space = factory._get_device_space()
factory = devicefactory.get_device_factory(self.b,
self.device_type,
size,
disks=self.b.disks,
**kwargs)
# disks contain a 500 MiB device, which includes varying amounts of
# metadata and space lost to partition alignment.
self.assertAlmostEqual(factory._get_free_disk_space(),
sum(d.size for d in self.b.disks) - device_space,
delta=self._get_size_delta(devices=[device]))
def test_normalize_size(self):
# _normalize_size should adjust target size to within the format limits
fstype = "ext2"
ext2 = get_format(fstype)
self.assertTrue(ext2.max_size > Size(0))
size = Size("9 TiB")
self.assertTrue(size > ext2.max_size)
kwargs = self._get_test_factory_args()
factory = devicefactory.get_device_factory(self.b,
self.device_type,
size,
disks=self.b.disks,
fstype=fstype,
**kwargs)
factory._normalize_size()
self.assertTrue(factory.size <= ext2.max_size)
# _normalize_size should convert a size of None to a reasonable guess
# at the largest possible size based on disk free space
factory.size = None
factory._normalize_size()
self.assertIsInstance(factory.size, blivet.size.Size)
self.assertTrue(factory.size <= ext2.max_size)
# Allow some variation in size for metadata, alignment, &c.
self.assertAlmostEqual(factory.size, sum(d.size for d in self.b.disks),
delta=self._get_size_delta())
# _handle_no_size should also take into account any specified factory
# device, in case the factory is to be modifying a defined device
# must be a couple MiB smaller than the disk to accommodate
# PartitionFactory
size = self.b.disks[0].size - Size("4 MiB")
device = self._factory_device(self.device_type, size,
disks=self.b.disks, **kwargs)
self.assertAlmostEqual(device.size, size, delta=self._get_size_delta())
factory.size = None
factory.device = device
factory._normalize_size()
self.assertIsInstance(factory.size, blivet.size.Size)
self.assertTrue(factory.size <= ext2.max_size)
# factory size should be total disk space plus current device space
# Allow some variation in size for metadata, alignment, &c.
self.assertAlmostEqual(factory.size,
sum(d.size for d in self.b.disks),
delta=self._get_size_delta(devices=[device]))
class PartitionFactoryTestCase(DeviceFactoryTestCase):
device_class = PartitionDevice
device_type = devicefactory.DEVICE_TYPE_PARTITION
def test_bug1178884(self):
# Test a change of format and size where old size is too large for the
# new format but not for the old one.
device_type = self.device_type
size = Size('400 MiB')
kwargs = {"disks": self.b.disks,
"fstype": 'ext4',
"mountpoint": '/factorytest'}
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
kwargs["device"] = device
kwargs["fstype"] = "prepboot"
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
def _get_size_delta(self, devices=None):
delta = Size("2 MiB")
if devices:
delta += Size("2 MiB") * len(devices)
return delta
class LVMFactoryTestCase(DeviceFactoryTestCase):
device_class = LVMLogicalVolumeDevice
device_type = devicefactory.DEVICE_TYPE_LVM
def _validate_factory_device(self, *args, **kwargs):
super(LVMFactoryTestCase, self)._validate_factory_device(*args, **kwargs)
device = args[0]
if kwargs.get("encrypted"):
container = device.slave.container
else:
container = device.container
if kwargs.get("container_encrypted"):
member_class = LUKSDevice
elif kwargs.get("container_raid_level"):
member_class = MDRaidArrayDevice
else:
member_class = PartitionDevice
self.assertEqual(container.encrypted,
kwargs.get("container_encrypted", False))
for pv in container.parents:
self.assertEqual(pv.format.type, "lvmpv")
self.assertEqual(pv.encrypted, kwargs.get("container_encrypted", False))
self.assertIsInstance(pv, member_class)
def test_device_factory(self):
super(LVMFactoryTestCase, self).test_device_factory()
##
# New device
##
device_type = self.device_type
size = Size('400 MiB')
kwargs = {"disks": self.b.disks,
"fstype": 'ext4',
"mountpoint": '/factorytest'}
if self.encryption_supported:
# encrypt the PVs
kwargs["encrypted"] = False
kwargs["container_encrypted"] = True
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
for partition in self.b.partitions:
self.b.recursive_remove(partition)
# Add mirroring of PV using MD
kwargs["container_encrypted"] = False
kwargs["container_raid_level"] = "raid1"
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
for partition in self.b.partitions:
self.b.recursive_remove(partition)
##
# Reconfigure device
##
# Create a basic LVM stack
device_type = self.device_type
size = Size('800 MiB')
kwargs = {"disks": self.b.disks,
"fstype": 'ext4',
"mountpoint": '/factorytest'}
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
if self.encryption_supported:
# Encrypt the LV
# Yes, this is duplicated from the base class but this allows us to
# test a reconfiguration from encrypted leaf to encrypted container
# members in the next test.
kwargs["encrypted"] = True
kwargs["device"] = device
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
# Decrypt the LV, but encrypt the PVs
kwargs["encrypted"] = False
kwargs["container_encrypted"] = True
kwargs["device"] = device
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
# Switch to an encrypted raid0 md pv
kwargs["container_raid_level"] = "raid0"
kwargs["device"] = device
size = Size("400 MiB")
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
# remove encryption from the md pv
kwargs["container_encrypted"] = False
kwargs["device"] = device
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
# switch back to normal partition pvs
kwargs["container_raid_level"] = None
kwargs["device"] = device
size = Size("750 MiB")
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
def _get_size_delta(self, devices=None):
if not devices:
delta = Size("2 MiB") * len(self.b.disks)
else:
delta = Size("4 MiB") * len(self.b.disks) * (len(devices) + 1)
return delta
def test_get_container(self):
for disk in self.b.disks:
self.b.format_device(disk, get_format("lvmpv"))
vg = self.b.new_vg(parents=self.b.disks, name="newvg")
self.b.create_device(vg)
self.assertEqual(self.b.vgs, [vg])
factory = devicefactory.get_device_factory(self.b,
self.device_type,
Size("500 MiB"),
fstype="xfs")
# get_container on lvm factory should return the lone non-existent vg
self.assertEqual(factory.get_container(), vg)
# get_container should require allow_existing to return an existing vg
vg.exists = True
vg._complete = True
self.assertEqual(factory.get_container(), None)
self.assertEqual(factory.get_container(allow_existing=True), vg)
class LVMThinPFactoryTestCase(LVMFactoryTestCase):
device_class = LVMThinLogicalVolumeDevice
device_type = devicefactory.DEVICE_TYPE_LVM_THINP
encryption_supported = False
def _validate_factory_device(self, *args, **kwargs):
super(LVMThinPFactoryTestCase, self)._validate_factory_device(*args,
**kwargs)
device = args[0]
if kwargs.get("encrypted", False):
thinlv = device.slave
else:
thinlv = device
self.assertTrue(hasattr(thinlv, "pool"))
return device
def _get_size_delta(self, devices=None):
delta = super(LVMThinPFactoryTestCase, self)._get_size_delta(devices=devices)
if devices:
# we reserve 20% of thin pool size in VG for pool metadata
delta += sum(d.size for d in devices) * Decimal('0.20')
return delta
class MDFactoryTestCase(DeviceFactoryTestCase):
device_type = devicefactory.DEVICE_TYPE_MD
device_class = MDRaidArrayDevice
def test_device_factory(self):
# RAID0 across two disks
device_type = self.device_type
size = Size('1 GiB')
kwargs = {"disks": self.b.disks,
"fstype": 'ext4',
"raid_level": "raid0",
"mountpoint": '/factorytest'}
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
self.b.recursive_remove(device)
# Encrypt the leaf device
kwargs["encrypted"] = True
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
for partition in self.b.partitions:
self.b.recursive_remove(partition)
# RAID1 across two disks
size = Size('500 MiB')
kwargs = {"disks": self.b.disks,
"fstype": 'ext4',
"raid_level": "raid1",
"mountpoint": '/factorytest'}
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
for partition in self.b.partitions:
self.b.recursive_remove(partition)
##
# Reconfigure device
##
# RAID0 across two disks w/ swap
size = Size('800 MiB')
kwargs = {"disks": self.b.disks,
"fstype": 'swap',
"raid_level": "raid0",
"label": 'SWAP00'}
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
# Encrypt the leaf device
kwargs["encrypted"] = True
kwargs["device"] = device
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
# Change the mountpoint
size = Size('400 MiB')
kwargs["raid_level"] = "raid1"
kwargs["mountpoint"] = "/a/different/dir"
kwargs["label"] = "fedora 53 root"
kwargs["fstype"] = "xfs"
kwargs["device"] = device
# kwargs["encrypted"] = False
device = self._factory_device(device_type, size, **kwargs)
self._validate_factory_device(device, device_type, size, **kwargs)
def _get_size_delta(self, devices=None):
return Size("2 MiB") * len(self.b.disks)
def _get_test_factory_args(self):
return {"raid_level": "raid0"}
"""Note that the following tests postdate the code that they test.
Therefore, they capture the behavior of the code as it is now,
not necessarily its intended or its correct behavior. See the
initial commit message for this file for further details.
"""
def test_mdfactory(self):
factory1 = devicefactory.get_device_factory(self.b,
devicefactory.DEVICE_TYPE_MD,
Size("1 GiB"),
raid_level=raid.RAID1)
factory2 = devicefactory.get_device_factory(self.b,
devicefactory.DEVICE_TYPE_MD,
Size("1 GiB"),
raid_level=0)
with self.assertRaisesRegex(devicefactory.DeviceFactoryError, "must have some RAID level"):
devicefactory.get_device_factory(
self.b,
devicefactory.DEVICE_TYPE_MD,
Size("1 GiB"))
with self.assertRaisesRegex(RaidError, "requires at least"):
factory1._get_device_space()
with self.assertRaisesRegex(RaidError, "requires at least"):
factory1._configure()
self.assertEqual(factory1.container_list, [])
self.assertIsNone(factory1.get_container())
parents = [
DiskDevice("name1", fmt=get_format("mdmember")),
DiskDevice("name2", fmt=get_format("mdmember"))
]
self.assertIsNotNone(factory1._get_new_device(parents=parents))
with self.assertRaisesRegex(RaidError, "requires at least"):
factory2._get_device_space()
self.assertEqual(factory2.container_list, [])
self.assertIsNone(factory2.get_container())