def test_lvm_clear(self):
def fake_lvm_size(path):
return lvm_size
def fake_execute(*cmd, **kwargs):
executes.append(cmd)
self.stubs.Set(lvm, 'get_volume_size', fake_lvm_size)
self.stubs.Set(utils, 'execute', fake_execute)
# Test the correct dd commands are run for various sizes
lvm_size = 1
executes = []
expected_commands = [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/v1',
'seek=0', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/v1')
self.assertEqual(expected_commands, executes)
lvm_size = 1024
executes = []
expected_commands = [('dd', 'bs=1024', 'if=/dev/zero', 'of=/dev/v2',
'seek=0', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/v2')
self.assertEqual(expected_commands, executes)
lvm_size = 1025
executes = []
expected_commands = [('dd', 'bs=1024', 'if=/dev/zero', 'of=/dev/v3',
'seek=0', 'count=1', 'conv=fdatasync')]
expected_commands += [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/v3',
'seek=1024', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/v3')
self.assertEqual(expected_commands, executes)
lvm_size = 1048576
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v4',
'seek=0', 'count=1', 'oflag=direct')]
lvm.clear_volume('/dev/v4')
self.assertEqual(expected_commands, executes)
lvm_size = 1048577
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v5',
'seek=0', 'count=1', 'oflag=direct')]
expected_commands += [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/v5',
'seek=1048576', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/v5')
self.assertEqual(expected_commands, executes)
lvm_size = 1234567
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v6',
'seek=0', 'count=1', 'oflag=direct')]
expected_commands += [('dd', 'bs=1024', 'if=/dev/zero', 'of=/dev/v6',
'seek=1024', 'count=181', 'conv=fdatasync')]
expected_commands += [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/v6',
'seek=1233920', 'count=647', 'conv=fdatasync')]
lvm.clear_volume('/dev/v6')
self.assertEqual(expected_commands, executes)
# Test volume_clear_size limits the size
lvm_size = 10485761
CONF.set_override('volume_clear_size', '1', 'libvirt')
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v7',
'seek=0', 'count=1', 'oflag=direct')]
lvm.clear_volume('/dev/v7')
self.assertEqual(expected_commands, executes)
CONF.set_override('volume_clear_size', '2', 'libvirt')
lvm_size = 1048576
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v9',
'seek=0', 'count=1', 'oflag=direct')]
lvm.clear_volume('/dev/v9')
self.assertEqual(expected_commands, executes)
# Test volume_clear=shred
CONF.set_override('volume_clear', 'shred', 'libvirt')
CONF.set_override('volume_clear_size', '0', 'libvirt')
lvm_size = 1048576
executes = []
expected_commands = [('shred', '-n3', '-s1048576', '/dev/va')]
lvm.clear_volume('/dev/va')
self.assertEqual(expected_commands, executes)
CONF.set_override('volume_clear', 'shred', 'libvirt')
CONF.set_override('volume_clear_size', '1', 'libvirt')
lvm_size = 10485761
executes = []
expected_commands = [('shred', '-n3', '-s1048576', '/dev/vb')]
lvm.clear_volume('/dev/vb')
self.assertEqual(expected_commands, executes)
# Test volume_clear=none does nothing
CONF.set_override('volume_clear', 'none', 'libvirt')
executes = []
expected_commands = []
lvm.clear_volume('/dev/vc')
self.assertEqual(expected_commands, executes)
# Test volume_clear=invalid falls back to the default 'zero'
CONF.set_override('volume_clear', 'invalid', 'libvirt')
lvm_size = 1
executes = []
expected_commands = [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/vd',
'seek=0', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/vd')
self.assertEqual(expected_commands, executes)
def test_lvm_clear_ignore_lvm_not_found(self, mock_execute):
lvm.clear_volume('/dev/foo')
def test_lvm_clear(self):
def fake_lvm_size(path):
return lvm_size
def fake_execute(*cmd, **kwargs):
executes.append(cmd)
self.stubs.Set(lvm, 'get_volume_size', fake_lvm_size)
self.stubs.Set(utils, 'execute', fake_execute)
# Test the correct dd commands are run for various sizes
lvm_size = 1
executes = []
expected_commands = [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/v1',
'seek=0', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/v1')
self.assertEqual(expected_commands, executes)
lvm_size = 1024
executes = []
expected_commands = [('dd', 'bs=1024', 'if=/dev/zero', 'of=/dev/v2',
'seek=0', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/v2')
self.assertEqual(expected_commands, executes)
lvm_size = 1025
executes = []
expected_commands = [('dd', 'bs=1024', 'if=/dev/zero', 'of=/dev/v3',
'seek=0', 'count=1', 'conv=fdatasync')]
expected_commands += [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/v3',
'seek=1024', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/v3')
self.assertEqual(expected_commands, executes)
lvm_size = 1048576
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v4',
'seek=0', 'count=1', 'oflag=direct')]
lvm.clear_volume('/dev/v4')
self.assertEqual(expected_commands, executes)
lvm_size = 1048577
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v5',
'seek=0', 'count=1', 'oflag=direct')]
expected_commands += [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/v5',
'seek=1048576', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/v5')
self.assertEqual(expected_commands, executes)
lvm_size = 1234567
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v6',
'seek=0', 'count=1', 'oflag=direct')]
expected_commands += [('dd', 'bs=1024', 'if=/dev/zero', 'of=/dev/v6',
'seek=1024', 'count=181', 'conv=fdatasync')]
expected_commands += [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/v6',
'seek=1233920', 'count=647', 'conv=fdatasync')]
lvm.clear_volume('/dev/v6')
self.assertEqual(expected_commands, executes)
# Test volume_clear_size limits the size
lvm_size = 10485761
CONF.set_override('volume_clear_size', '1', 'libvirt')
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v7',
'seek=0', 'count=1', 'oflag=direct')]
lvm.clear_volume('/dev/v7')
self.assertEqual(expected_commands, executes)
CONF.set_override('volume_clear_size', '2', 'libvirt')
lvm_size = 1048576
executes = []
expected_commands = [('dd', 'bs=1048576', 'if=/dev/zero', 'of=/dev/v9',
'seek=0', 'count=1', 'oflag=direct')]
lvm.clear_volume('/dev/v9')
self.assertEqual(expected_commands, executes)
# Test volume_clear=shred
CONF.set_override('volume_clear', 'shred', 'libvirt')
CONF.set_override('volume_clear_size', '0', 'libvirt')
lvm_size = 1048576
executes = []
expected_commands = [('shred', '-n3', '-s1048576', '/dev/va')]
lvm.clear_volume('/dev/va')
self.assertEqual(expected_commands, executes)
CONF.set_override('volume_clear', 'shred', 'libvirt')
CONF.set_override('volume_clear_size', '1', 'libvirt')
lvm_size = 10485761
executes = []
expected_commands = [('shred', '-n3', '-s1048576', '/dev/vb')]
lvm.clear_volume('/dev/vb')
self.assertEqual(expected_commands, executes)
# Test volume_clear=none does nothing
CONF.set_override('volume_clear', 'none', 'libvirt')
executes = []
expected_commands = []
lvm.clear_volume('/dev/vc')
self.assertEqual(expected_commands, executes)
# Test volume_clear=invalid falls back to the default 'zero'
CONF.set_override('volume_clear', 'invalid', 'libvirt')
lvm_size = 1
executes = []
expected_commands = [('dd', 'bs=1', 'if=/dev/zero', 'of=/dev/vd',
'seek=0', 'count=1', 'conv=fdatasync')]
lvm.clear_volume('/dev/vd')
self.assertEqual(expected_commands, executes)
def test_lvm_clear_ignore_lvm_not_found(self, mock_execute):
lvm.clear_volume('/dev/foo')
