def test_writable_cow_multiline_table(self):
# Let's do some silly math
size = directio.size(self._ramdisk)
megs = size / 1024 / 1024
megs = megs - megs % 4
# 12 megs for a volume, 4 for lvm itself
alloc = megs - 12 - 4
vg = self.conf.string('volume', 'volume_group', None)
# Reserve a 4m hole at the front, and 8m at the end
execute('lvcreate', vg, size='4m', name='tmpvol')
execute('lvcreate', vg, size='%sm' % alloc, name='wasted')
execute('lvremove', '%s/tmpvol' % vg, force=None)
foo = execute('pvs', self._ramdisk)
foo = execute('vgs', vg)
foo = execute('lvs', vg)
volume_id = str(uuid4())
self.volume.create(volume_id)
volume = self.volume.get(volume_id)
execute('lvremove', '%s/wasted' % vg, force=None)
dmname = '%s-%s' % (re.sub('-', '--', vg),
re.sub('-', '--', volume_id))
foo = execute('dmsetup', 'table', dmname)
self.assert_('\n' in foo)
backup_id = str(uuid4())
snapshot = self.volume.create_snapshot(volume_id, backup_id, '123456')
scrub = Scrub(LunrConfig())
(cow_name, cow_path) = scrub.get_writable_cow(snapshot, volume)
execute('dmsetup', 'remove', cow_name)
self.assertTrue(True)
def test_writable_cow_multiline_table(self):
# Let's do some silly math
size = directio.size(self._ramdisk)
megs = size / 1024 / 1024
megs = megs - megs % 4
# 12 megs for a volume, 4 for lvm itself
alloc = megs - 12 - 4
vg = self.conf.string('volume', 'volume_group', None)
# Reserve a 4m hole at the front, and 8m at the end
execute('lvcreate', vg, size='4m', name='tmpvol')
execute('lvcreate', vg, size='%sm' % alloc, name='wasted')
execute('lvremove', '%s/tmpvol' % vg, force=None)
foo = execute('pvs', self._ramdisk)
foo = execute('vgs', vg)
foo = execute('lvs', vg)
volume_id = str(uuid4())
self.volume.create(volume_id)
volume = self.volume.get(volume_id)
execute('lvremove', '%s/wasted' % vg, force=None)
dmname = '%s-%s' % (re.sub('-', '--', vg), re.sub(
'-', '--', volume_id))
foo = execute('dmsetup', 'table', dmname)
self.assert_('\n' in foo)
backup_id = str(uuid4())
snapshot = self.volume.create_snapshot(volume_id, backup_id, '123456')
scrub = Scrub(LunrConfig())
(cow_name, cow_path) = scrub.get_writable_cow(snapshot, volume)
execute('dmsetup', 'remove', cow_name)
self.assertTrue(True)
def test_snapshot_scrub(self):
block_size = 32768
# Create a Volume
volume_id = str(uuid4())
self.volume.create(volume_id)
# Get the volume information
volume = self.volume.get(volume_id)
# Fill the volume with 'ZERG's
with directio.open(volume['path']) as file:
size = directio.size(volume['path'])
for i in xrange(0, size / block_size):
# 32768 / 4 = 8192
file.write('ZERG' * (block_size / 4))
# Create a snap-shot with a timestamp of 123456
backup_id = str(uuid4())
snapshot = self.volume.create_snapshot(volume_id, backup_id, '123456')
# Now that the snapshot is made, simulate users making writes
# to the origin during a normal backup. This should generate
# exceptions in the cow
with directio.open(volume['path']) as file:
# Overwrite all the zergs.
for i in xrange(0, size / block_size):
file.write('A' * block_size)
# Tell scrub we don't want it to remove the cow after scrubbing
scrub = Scrub(LunrConfig())
# Build the cow-zero
(cow_name, cow_path) = scrub.get_writable_cow(snapshot, volume)
with directio.open(cow_path) as file:
size = directio.size(cow_path)
for i in xrange(0, size / block_size):
block = file.read(block_size)
if 'ZERG' in block:
self.assert_(True)
break
with directio.open(self._ramdisk) as file:
size = directio.size(self._ramdisk)
for i in xrange(0, size / block_size):
block = file.read(block_size)
if 'ZERG' in block:
self.assert_(True)
break
# Scrub the cow of all exceptions
scrub.scrub_cow(cow_path)
scrub.remove_cow(cow_name)
# Remove & scrub the volume. LVM removes snapshot itself.
self.volume.remove_lvm_volume(volume)
# Read full disk for hidden zergs.
with directio.open(self._ramdisk) as file:
size = directio.size(self._ramdisk)
for i in xrange(0, size / block_size):
block = file.read(block_size)
if 'ZERG' in block:
self.fail("Found zergs on disk: %s" % self._ramdisk)
def test_snapshot_scrub(self):
block_size = 32768
# Create a Volume
volume_id = str(uuid4())
self.volume.create(volume_id)
# Get the volume information
volume = self.volume.get(volume_id)
# Fill the volume with 'ZERG's
with directio.open(volume['path']) as file:
size = directio.size(volume['path'])
for i in xrange(0, size / block_size):
# 32768 / 4 = 8192
file.write('ZERG' * (block_size / 4))
# Create a snap-shot with a timestamp of 123456
backup_id = str(uuid4())
snapshot = self.volume.create_snapshot(volume_id, backup_id, '123456')
# Now that the snapshot is made, simulate users making writes
# to the origin during a normal backup. This should generate
# exceptions in the cow
with directio.open(volume['path']) as file:
# Overwrite all the zergs.
for i in xrange(0, size / block_size):
file.write('A' * block_size)
# Tell scrub we don't want it to remove the cow after scrubbing
scrub = Scrub(LunrConfig())
# Build the cow-zero
(cow_name, cow_path) = scrub.get_writable_cow(snapshot, volume)
with directio.open(cow_path) as file:
size = directio.size(cow_path)
for i in xrange(0, size / block_size):
block = file.read(block_size)
if 'ZERG' in block:
self.assert_(True)
break
with directio.open(self._ramdisk) as file:
size = directio.size(self._ramdisk)
for i in xrange(0, size / block_size):
block = file.read(block_size)
if 'ZERG' in block:
self.assert_(True)
break
# Scrub the cow of all exceptions
scrub.scrub_cow(cow_path)
scrub.remove_cow(cow_name)
# Remove & scrub the volume. LVM removes snapshot itself.
self.volume.remove_lvm_volume(volume)
# Read full disk for hidden zergs.
with directio.open(self._ramdisk) as file:
size = directio.size(self._ramdisk)
for i in xrange(0, size / block_size):
block = file.read(block_size)
if 'ZERG' in block:
self.fail("Found zergs on disk: %s" % self._ramdisk)
