def remove_partition(dev, num):
LOG.debug('Trying to remove partition: dev=%s num=%s' % (dev, num))
if not any(x['fstype'] != 'free' and x['num'] == num
for x in info(dev)['parts']):
raise errors.PartitionNotFoundError('Partition %s not found' % num)
utils.execute('udevadm', 'settle', '--quiet', check_exit_code=[0])
out, err = utils.execute('parted',
'-s',
dev,
'rm',
str(num),
check_exit_code=[0])
def _make_partitions(parteds):
for parted in parteds:
pu.make_label(parted.name, parted.label)
for prt in parted.partitions:
pu.make_partition(prt.device, prt.begin, prt.end, prt.type)
utils.udevadm_trigger_blocks()
for flag in prt.flags:
pu.set_partition_flag(prt.device, prt.count, flag)
if prt.guid:
pu.set_gpt_type(prt.device, prt.count, prt.guid)
# If any partition to be created doesn't exist it's an error.
# Probably it's again 'device or resource busy' issue.
if not os.path.exists(prt.name):
raise errors.PartitionNotFoundError(
'Partition %s not found after creation' % prt.name)
def do_partitioning(self):
LOG.debug('--- Partitioning disks (do_partitioning) ---')
# If disks are not wiped out at all, it is likely they contain lvm
# and md metadata which will prevent re-creating a partition table
# with 'device is busy' error.
mu.mdclean_all()
lu.lvremove_all()
lu.vgremove_all()
lu.pvremove_all()
# Here is udev's rules blacklisting to be done:
# by adding symlinks to /dev/null in /etc/udev/rules.d for already
# existent rules in /lib/.
# 'parted' generates too many udev events in short period of time
# so we should increase processing speed for those events,
# otherwise partitioning is doomed.
empty_rule_path = os.path.join(CONF.udev_rules_dir,
os.path.basename(CONF.udev_empty_rule))
with open(empty_rule_path, 'w') as f:
f.write('#\n')
LOG.debug("Enabling udev's rules blacklisting")
for rule in os.listdir(CONF.udev_rules_lib_dir):
dst = os.path.join(CONF.udev_rules_dir, rule)
if os.path.isdir(dst):
continue
if dst.endswith('.rules'):
# for successful blacklisting already existent file with name
# from /etc which overlaps with /lib should be renamed prior
# symlink creation.
try:
if os.path.exists(dst):
os.rename(
dst,
dst[:-len('.rules')] + CONF.udev_rename_substr)
except OSError:
LOG.debug("Skipping udev rule %s blacklising" % dst)
else:
os.symlink(empty_rule_path, dst)
utils.execute('udevadm',
'control',
'--reload-rules',
check_exit_code=[0])
for parted in self.driver.partition_scheme.parteds:
for prt in parted.partitions:
# We wipe out the beginning of every new partition
# right after creating it. It allows us to avoid possible
# interactive dialog if some data (metadata or file system)
# present on this new partition and it also allows udev not
# hanging trying to parse this data.
utils.execute('dd',
'if=/dev/zero',
'bs=1M',
'seek=%s' % max(prt.begin - 3, 0),
'count=5',
'of=%s' % prt.device,
check_exit_code=[0])
# Also wipe out the ending of every new partition.
# Different versions of md stores metadata in different places.
# Adding exit code 1 to be accepted as for handling situation
# when 'no space left on device' occurs.
utils.execute('dd',
'if=/dev/zero',
'bs=1M',
'seek=%s' % max(prt.end - 3, 0),
'count=5',
'of=%s' % prt.device,
check_exit_code=[0, 1])
for parted in self.driver.partition_scheme.parteds:
pu.make_label(parted.name, parted.label)
for prt in parted.partitions:
pu.make_partition(prt.device, prt.begin, prt.end, prt.type)
for flag in prt.flags:
pu.set_partition_flag(prt.device, prt.count, flag)
if prt.guid:
pu.set_gpt_type(prt.device, prt.count, prt.guid)
# If any partition to be created doesn't exist it's an error.
# Probably it's again 'device or resource busy' issue.
if not os.path.exists(prt.name):
raise errors.PartitionNotFoundError(
'Partition %s not found after creation' % prt.name)
# disable udev's rules blacklisting
LOG.debug("Disabling udev's rules blacklisting")
for rule in os.listdir(CONF.udev_rules_dir):
src = os.path.join(CONF.udev_rules_dir, rule)
if os.path.isdir(src):
continue
if src.endswith('.rules'):
if os.path.islink(src):
try:
os.remove(src)
except OSError:
LOG.debug("Skipping udev rule %s de-blacklisting" %
src)
elif src.endswith(CONF.udev_rename_substr):
try:
if os.path.exists(src):
os.rename(
src,
src[:-len(CONF.udev_rename_substr)] + '.rules')
except OSError:
LOG.debug("Skipping udev rule %s de-blacklisting" % src)
utils.execute('udevadm',
'control',
'--reload-rules',
check_exit_code=[0])
# NOTE(agordeev): re-create all the links which were skipped by udev
# while blacklisted
# NOTE(agordeev): do subsystem match, otherwise it will stuck
utils.execute('udevadm',
'trigger',
'--subsystem-match=block',
check_exit_code=[0])
utils.execute('udevadm', 'settle', '--quiet', check_exit_code=[0])
# If one creates partitions with the same boundaries as last time,
# there might be md and lvm metadata on those partitions. To prevent
# failing of creating md and lvm devices we need to make sure
# unused metadata are wiped out.
mu.mdclean_all()
lu.lvremove_all()
lu.vgremove_all()
lu.pvremove_all()
# creating meta disks
for md in self.driver.partition_scheme.mds:
mu.mdcreate(md.name, md.level, *md.devices)
# creating physical volumes
for pv in self.driver.partition_scheme.pvs:
lu.pvcreate(pv.name,
metadatasize=pv.metadatasize,
metadatacopies=pv.metadatacopies)
# creating volume groups
for vg in self.driver.partition_scheme.vgs:
lu.vgcreate(vg.name, *vg.pvnames)
# creating logical volumes
for lv in self.driver.partition_scheme.lvs:
lu.lvcreate(lv.vgname, lv.name, lv.size)
# making file systems
for fs in self.driver.partition_scheme.fss:
found_images = [
img for img in self.driver.image_scheme.images
if img.target_device == fs.device
]
if not found_images:
fu.make_fs(fs.type, fs.options, fs.label, fs.device)
def remove_partition(dev, num):
if not any(x['fstype'] != 'free' and x['num'] == num
for x in info(dev)['parts']):
raise errors.PartitionNotFoundError('Partition %s not found' % num)
utils.execute('parted', '-s', dev, 'rm', str(num), check_exit_code=[0])
def do_partitioning(self):
LOG.debug('--- Partitioning disks (do_partitioning) ---')
if self.driver.partition_scheme.skip_partitioning:
LOG.debug('Some of fs has keep_data flag, '
'partitioning is skiping')
self.do_clean_filesystems()
return
# If disks are not wiped out at all, it is likely they contain lvm
# and md metadata which will prevent re-creating a partition table
# with 'device is busy' error.
mu.mdclean_all()
lu.lvremove_all()
lu.vgremove_all()
lu.pvremove_all()
LOG.debug("Enabling udev's rules blacklisting")
utils.blacklist_udev_rules(udev_rules_dir=CONF.udev_rules_dir,
udev_rules_lib_dir=CONF.udev_rules_lib_dir,
udev_rename_substr=CONF.udev_rename_substr,
udev_empty_rule=CONF.udev_empty_rule)
for parted in self.driver.partition_scheme.parteds:
for prt in parted.partitions:
# We wipe out the beginning of every new partition
# right after creating it. It allows us to avoid possible
# interactive dialog if some data (metadata or file system)
# present on this new partition and it also allows udev not
# hanging trying to parse this data.
utils.execute('dd',
'if=/dev/zero',
'bs=1M',
'seek=%s' % max(prt.begin - 3, 0),
'count=5',
'of=%s' % prt.device,
check_exit_code=[0])
# Also wipe out the ending of every new partition.
# Different versions of md stores metadata in different places.
# Adding exit code 1 to be accepted as for handling situation
# when 'no space left on device' occurs.
utils.execute('dd',
'if=/dev/zero',
'bs=1M',
'seek=%s' % max(prt.end - 3, 0),
'count=5',
'of=%s' % prt.device,
check_exit_code=[0, 1])
for parted in self.driver.partition_scheme.parteds:
pu.make_label(parted.name, parted.label)
for prt in parted.partitions:
pu.make_partition(prt.device, prt.begin, prt.end, prt.type)
for flag in prt.flags:
pu.set_partition_flag(prt.device, prt.count, flag)
if prt.guid:
pu.set_gpt_type(prt.device, prt.count, prt.guid)
# If any partition to be created doesn't exist it's an error.
# Probably it's again 'device or resource busy' issue.
if not os.path.exists(prt.name):
raise errors.PartitionNotFoundError(
'Partition %s not found after creation' % prt.name)
LOG.debug("Disabling udev's rules blacklisting")
utils.unblacklist_udev_rules(
udev_rules_dir=CONF.udev_rules_dir,
udev_rename_substr=CONF.udev_rename_substr)
# If one creates partitions with the same boundaries as last time,
# there might be md and lvm metadata on those partitions. To prevent
# failing of creating md and lvm devices we need to make sure
# unused metadata are wiped out.
mu.mdclean_all()
lu.lvremove_all()
lu.vgremove_all()
lu.pvremove_all()
# creating meta disks
for md in self.driver.partition_scheme.mds:
mu.mdcreate(md.name, md.level, md.devices, md.metadata)
# creating physical volumes
for pv in self.driver.partition_scheme.pvs:
lu.pvcreate(pv.name,
metadatasize=pv.metadatasize,
metadatacopies=pv.metadatacopies)
# creating volume groups
for vg in self.driver.partition_scheme.vgs:
lu.vgcreate(vg.name, *vg.pvnames)
# creating logical volumes
for lv in self.driver.partition_scheme.lvs:
lu.lvcreate(lv.vgname, lv.name, lv.size)
# making file systems
for fs in self.driver.partition_scheme.fss:
found_images = [
img for img in self.driver.image_scheme.images
if img.target_device == fs.device
]
if not found_images:
fu.make_fs(fs.type, fs.options, fs.label, fs.device)