def _write_image(image_info, device):
"""Writes an image to the specified device.
:param image_info: Image information dictionary.
:param device: The disk name, as a string, on which to store the image.
Example: '/dev/sda'
:raises: ImageWriteError if the command to write the image encounters an
error.
"""
starttime = time.time()
image = _image_location(image_info)
uuids = {}
if image_info.get('image_type') == 'partition':
uuids = _write_partition_image(image, image_info, device)
else:
_write_whole_disk_image(image, image_info, device)
totaltime = time.time() - starttime
LOG.info('Image {} written to device {} in {} seconds'.format(
image, device, totaltime))
try:
disk_utils.fix_gpt_partition(device, node_uuid=None)
except exception.InstanceDeployFailure:
# Note: the catch internal to the helper method logs any errors.
pass
return uuids
def _stream_raw_image_onto_device(self, image_info, device):
"""Streams raw image data to specified local device.
:param image_info: Image information dictionary.
:param device: The disk name, as a string, on which to store the
image. Example: '/dev/sda'
:raises: ImageDownloadError if the image download encounters an error.
:raises: ImageChecksumError if the checksum of the local image does not
match the checksum as reported by glance in image_info.
"""
starttime = time.time()
image_download = ImageDownload(image_info, time_obj=starttime)
with open(device, 'wb+') as f:
try:
for chunk in image_download:
f.write(chunk)
except Exception as e:
msg = 'Unable to write image to device {}. Error: {}'.format(
device, str(e))
raise errors.ImageDownloadError(image_info['id'], msg)
totaltime = time.time() - starttime
LOG.info("Image streamed onto device {} in {} "
"seconds".format(device, totaltime))
# Verify if the checksum of the streamed image is correct
image_download.verify_image(device)
# Fix any gpt partition
try:
disk_utils.fix_gpt_partition(device, node_uuid=None)
except exception.InstanceDeployFailure:
# Note: the catch internal to the helper method logs any errors.
pass
def _stream_raw_image_onto_device(self, image_info, device):
"""Streams raw image data to specified local device.
:param image_info: Image information dictionary.
:param device: The disk name, as a string, on which to store the
image. Example: '/dev/sda'
:raises: ImageDownloadError if the image download encounters an error.
:raises: ImageChecksumError if the checksum of the local image does not
match the checksum as reported by glance in image_info.
"""
starttime = time.time()
total_retries = CONF.image_download_connection_retries
for attempt in range(total_retries + 1):
try:
image_download = ImageDownload(image_info, time_obj=starttime)
with open(device, 'wb+') as f:
try:
for chunk in image_download:
f.write(chunk)
except Exception as e:
msg = ('Unable to write image to device {}. '
'Error: {}').format(device, str(e))
raise errors.ImageDownloadError(image_info['id'], msg)
except errors.ImageDownloadError as e:
if attempt == CONF.image_download_connection_retries:
raise
else:
LOG.warning('Image download failed, %(attempt)s of '
'%(total)s: %(error)s',
{'attempt': attempt,
'total': total_retries,
'error': e})
time.sleep(CONF.image_download_connection_retry_interval)
else:
break
totaltime = time.time() - starttime
LOG.info("Image streamed onto device {} in {} "
"seconds".format(device, totaltime))
# Verify if the checksum of the streamed image is correct
image_download.verify_image(device)
# Fix any gpt partition
try:
disk_utils.fix_gpt_partition(device, node_uuid=None)
except exception.InstanceDeployFailure:
# Note: the catch internal to the helper method logs any errors.
pass
# Fix the root partition UUID
root_uuid = disk_utils.block_uuid(device)
LOG.info("{} UUID is now {}".format(device, root_uuid))
self.partition_uuids['root uuid'] = root_uuid
def create_config_drive_partition(node_uuid, device, configdrive):
"""Create a partition for config drive
Checks if the device is GPT or MBR partitioned and creates config drive
partition accordingly.
:param node_uuid: UUID of the Node.
:param device: The device path.
:param configdrive: Base64 encoded Gzipped configdrive content or
configdrive HTTP URL.
:raises: InstanceDeployFailure if config drive size exceeds maximum limit
or if it fails to create config drive.
"""
confdrive_file = None
try:
config_drive_part = get_labelled_partition(
device, disk_utils.CONFIGDRIVE_LABEL, node_uuid)
confdrive_mb, confdrive_file = get_configdrive(configdrive, node_uuid)
if confdrive_mb > MAX_CONFIG_DRIVE_SIZE_MB:
raise exception.InstanceDeployFailure(
'Config drive size exceeds maximum limit of 64MiB. '
'Size of the given config drive is %(size)d MiB for '
'node %(node)s.'
% {'size': confdrive_mb, 'node': node_uuid})
LOG.debug("Adding config drive partition %(size)d MiB to "
"device: %(dev)s for node %(node)s",
{'dev': device, 'size': confdrive_mb, 'node': node_uuid})
disk_utils.fix_gpt_partition(device, node_uuid)
if config_drive_part:
LOG.debug("Configdrive for node %(node)s exists at "
"%(part)s",
{'node': node_uuid, 'part': config_drive_part})
else:
cur_parts = set(part['number']
for part in disk_utils.list_partitions(device))
if disk_utils.get_partition_table_type(device) == 'gpt':
create_option = '0:-%dMB:0' % MAX_CONFIG_DRIVE_SIZE_MB
utils.execute('sgdisk', '-n', create_option, device,
run_as_root=True)
else:
# Check if the disk has 4 partitions. The MBR based disk
# cannot have more than 4 partitions.
# TODO(stendulker): One can use logical partitions to create
# a config drive if there are 3 primary partitions.
# https://bugs.launchpad.net/ironic/+bug/1561283
try:
pp_count, lp_count = disk_utils.count_mbr_partitions(
device)
except ValueError as e:
raise exception.InstanceDeployFailure(
'Failed to check the number of primary partitions '
'present on %(dev)s for node %(node)s. Error: '
'%(error)s' % {'dev': device, 'node': node_uuid,
'error': e})
if pp_count > 3:
raise exception.InstanceDeployFailure(
'Config drive cannot be created for node %(node)s. '
'Disk (%(dev)s) uses MBR partitioning and already '
'has %(parts)d primary partitions.'
% {'node': node_uuid, 'dev': device,
'parts': pp_count})
# Check if disk size exceeds 2TB msdos limit
startlimit = '-%dMiB' % MAX_CONFIG_DRIVE_SIZE_MB
endlimit = '-0'
if _is_disk_larger_than_max_size(device, node_uuid):
# Need to create a small partition at 2TB limit
LOG.warning("Disk size is larger than 2TB for "
"node %(node)s. Creating config drive "
"at the end of the disk %(disk)s.",
{'node': node_uuid, 'disk': device})
startlimit = (MAX_DISK_SIZE_MB_SUPPORTED_BY_MBR
- MAX_CONFIG_DRIVE_SIZE_MB - 1)
endlimit = MAX_DISK_SIZE_MB_SUPPORTED_BY_MBR - 1
utils.execute('parted', '-a', 'optimal', '-s', '--', device,
'mkpart', 'primary', 'fat32', startlimit,
endlimit, run_as_root=True)
# Trigger device rescan
disk_utils.trigger_device_rescan(device)
upd_parts = set(part['number']
for part in disk_utils.list_partitions(device))
new_part = set(upd_parts) - set(cur_parts)
if len(new_part) != 1:
raise exception.InstanceDeployFailure(
'Disk partitioning failed on device %(device)s. '
'Unable to retrieve config drive partition information.'
% {'device': device})
config_drive_part = disk_utils.partition_index_to_path(
device, new_part.pop())
disk_utils.udev_settle()
# NOTE(vsaienko): check that devise actually exists,
# it is not handled by udevadm when using ISCSI, for more info see:
# https://bugs.launchpad.net/ironic/+bug/1673731
# Do not use 'udevadm settle --exit-if-exist' here
LOG.debug('Waiting for the config drive partition %(part)s '
'on node %(node)s to be ready for writing.',
{'part': config_drive_part, 'node': node_uuid})
utils.execute('test', '-e', config_drive_part, attempts=15,
delay_on_retry=True)
disk_utils.dd(confdrive_file, config_drive_part)
LOG.info("Configdrive for node %(node)s successfully "
"copied onto partition %(part)s",
{'node': node_uuid, 'part': config_drive_part})
except (processutils.UnknownArgumentError,
processutils.ProcessExecutionError, OSError) as e:
msg = ('Failed to create config drive on disk %(disk)s '
'for node %(node)s. Error: %(error)s' %
{'disk': device, 'node': node_uuid, 'error': e})
LOG.error(msg)
raise exception.InstanceDeployFailure(msg)
finally:
# If the configdrive was requested make sure we delete the file
# after copying the content to the partition
if confdrive_file:
utils.unlink_without_raise(confdrive_file)