def shutdown_lvm(device):
"""
Shutdown specified lvm device.
"""
device = block.sys_block_path(device)
# lvm devices have a dm directory that containes a file 'name' containing
# '{volume group}-{logical volume}'. The volume can be freed using lvremove
name_file = os.path.join(device, 'dm', 'name')
lvm_name = util.load_file(name_file).strip()
(vg_name, lv_name) = lvm.split_lvm_name(lvm_name)
vg_lv_name = "%s/%s" % (vg_name, lv_name)
devname = "/dev/" + vg_lv_name
# wipe contents of the logical volume first
LOG.info('Wiping lvm logical volume: %s', devname)
block.quick_zero(devname, partitions=False)
# remove the logical volume
LOG.debug('using "lvremove" on %s', vg_lv_name)
util.subp(['lvremove', '--force', '--force', vg_lv_name])
# if that was the last lvol in the volgroup, get rid of volgroup
if len(lvm.get_lvols_in_volgroup(vg_name)) == 0:
pvols = lvm.get_pvols_in_volgroup(vg_name)
util.subp(['vgremove', '--force', '--force', vg_name], rcs=[0, 5])
# wipe the underlying physical volumes
for pv in pvols:
LOG.info('Wiping lvm physical volume: %s', pv)
block.quick_zero(pv, partitions=False)
# refresh lvmetad
lvm.lvm_scan()
def test_split_lvm_name(self, mock_util):
"""
make sure that split_lvm_name makes the right call to dmsetup splitname
"""
lv_name = 'root_lvol'
full_name = '{}-{}'.format(self.vg_name, lv_name)
mock_util.subp.return_value = (' {vg_name}{sep}{lv_name} '.format(
vg_name=self.vg_name, lv_name=lv_name, sep=lvm._SEP), '')
(res_vg_name, res_lv_name) = lvm.split_lvm_name(full_name)
self.assertEqual(res_vg_name, self.vg_name)
self.assertEqual(res_lv_name, lv_name)
mock_util.subp.assert_called_with([
'dmsetup', 'splitname', full_name, '-c', '--noheadings',
'--separator', lvm._SEP, '-o', 'vg_name,lv_name'
],
capture=True)