def _override_lvm_config(self, chroot):
# NOTE(sslypushenko) Due to possible races between LVM and multipath,
# we need to adjust LVM devices filter.
# This code is required only for Ubuntu 14.04, because in trusty,
# LVM filters, does not recognize partions on multipath devices
# out of the box. It is fixed in latest LVM versions
multipath_devs = [parted.name
for parted in self.driver.partition_scheme.parteds
if hw.is_multipath_device(parted.name)]
# If there are no multipath devices on the node, we should not do
# anything to prevent regression.
if multipath_devs:
# We need to explicitly whitelist each non-mutlipath device
lvm_filter = []
for parted in self.driver.partition_scheme.parteds:
device = parted.name
if device in multipath_devs:
continue
# We use devlinks from /dev/disk/by-id instead of /dev/sd*,
# because the first one are persistent.
devlinks_by_id = [
link for link in hw.udevreport(device).get('DEVLINKS', [])
if link.startswith('/dev/disk/by-id/')]
for link in devlinks_by_id:
lvm_filter.append(
'a|^{}(p)?(-part)?[0-9]*|'.format(link))
# Multipath devices should be whitelisted. All other devlinks
# should be blacklisted, to prevent LVM from grubbing underlying
# multipath devices.
lvm_filter.extend(CONF.lvm_filter_for_mpath)
# Setting devices/preferred_names also helps LVM to find devices by
# the proper devlinks
bu.override_lvm_config(
chroot,
{'devices': {
'scan': CONF.mpath_lvm_scan_dirs,
'global_filter': lvm_filter,
'preferred_names': CONF.mpath_lvm_preferred_names}},
lvm_conf_path=CONF.lvm_conf_path,
update_initramfs=True)
def test_udevreport(self, mock_exec):
# should run udevadm info OS command
# in order to get udev properties for a device
mock_exec.return_value = (
'DEVLINKS=\'/dev/disk/by-id/fakeid1 /dev/disk/by-id/fakeid2\'\n'
'DEVNAME=\'/dev/fake\'\n'
'DEVPATH=\'/devices/fakepath\'\n'
'DEVTYPE=\'disk\'\n'
'MAJOR=\'11\'\n'
'MINOR=\'0\'\n'
'ID_BUS=\'fakebus\'\n'
'ID_MODEL=\'fakemodel\'\n'
'ID_SERIAL_SHORT=\'fakeserial\'\n'
'ID_WWN=\'fakewwn\'\n'
'ID_CDROM=\'1\'\n'
'ANOTHER=\'another\'\n',
''
)
expected = {
'DEVLINKS': ['/dev/disk/by-id/fakeid1', '/dev/disk/by-id/fakeid2'],
'DEVNAME': '/dev/fake',
'DEVPATH': '/devices/fakepath',
'DEVTYPE': 'disk',
'MAJOR': '11',
'MINOR': '0',
'ID_BUS': 'fakebus',
'ID_MODEL': 'fakemodel',
'ID_SERIAL_SHORT': 'fakeserial',
'ID_WWN': 'fakewwn',
'ID_CDROM': '1'
}
self.assertEqual(expected, hu.udevreport('/dev/fake'))
mock_exec.assert_called_once_with('udevadm',
'info',
'--query=property',
'--export',
'--name=/dev/fake',
check_exit_code=[0])
def test_udevreport(self, mock_exec):
# should run udevadm info OS command
# in order to get udev properties for a device
mock_exec.return_value = (
'DEVLINKS=\'/dev/disk/by-id/fakeid1 /dev/disk/by-id/fakeid2\'\n'
'DEVNAME=\'/dev/fake\'\n'
'DEVPATH=\'/devices/fakepath\'\n'
'DEVTYPE=\'disk\'\n'
'MAJOR=\'11\'\n'
'MINOR=\'0\'\n'
'ID_BUS=\'fakebus\'\n'
'ID_MODEL=\'fakemodel\'\n'
'ID_SERIAL_SHORT=\'fakeserial\'\n'
'ID_WWN=\'fakewwn\'\n'
'ID_CDROM=\'1\'\n'
'ANOTHER=\'another\'\n', '')
expected = {
'DEVLINKS': ['/dev/disk/by-id/fakeid1', '/dev/disk/by-id/fakeid2'],
'DEVNAME': '/dev/fake',
'DEVPATH': '/devices/fakepath',
'DEVTYPE': 'disk',
'MAJOR': '11',
'MINOR': '0',
'ID_BUS': 'fakebus',
'ID_MODEL': 'fakemodel',
'ID_SERIAL_SHORT': 'fakeserial',
'ID_WWN': 'fakewwn',
'ID_CDROM': '1'
}
self.assertEqual(expected, hu.udevreport('/dev/fake'))
mock_exec.assert_called_once_with('udevadm',
'info',
'--query=property',
'--export',
'--name=/dev/fake',
check_exit_code=[0])