602 lines
27 KiB
Python
602 lines
27 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Logic related to handling partitions.
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Imported from ironic-lib's disk_utils as of the following commit:
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https://opendev.org/openstack/ironic-lib/commit/9fb5be348202f4854a455cd08f400ae12b99e1f2
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"""
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import base64
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import gzip
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import io
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import math
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import os
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import shlex
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import shutil
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import stat
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import tempfile
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from ironic_lib import disk_utils
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from ironic_lib import exception
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from ironic_lib import utils
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from oslo_concurrency import processutils
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from oslo_config import cfg
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from oslo_log import log
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from oslo_utils import excutils
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from oslo_utils import units
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from oslo_utils import uuidutils
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import requests
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from ironic_python_agent import errors
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from ironic_python_agent import hardware
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from ironic_python_agent import utils as ipa_utils
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LOG = log.getLogger()
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CONF = cfg.CONF
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MAX_CONFIG_DRIVE_SIZE_MB = 64
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# Maximum disk size supported by MBR is 2TB (2 * 1024 * 1024 MB)
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MAX_DISK_SIZE_MB_SUPPORTED_BY_MBR = 2097152
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def get_configdrive(configdrive, node_uuid, tempdir=None):
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"""Get the information about size and location of the configdrive.
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:param configdrive: Base64 encoded Gzipped configdrive content or
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configdrive HTTP URL.
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:param node_uuid: Node's uuid. Used for logging.
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:param tempdir: temporary directory for the temporary configdrive file
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:raises: InstanceDeployFailure if it can't download or decode the
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config drive.
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:returns: A tuple with the size in MiB and path to the uncompressed
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configdrive file.
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"""
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# Check if the configdrive option is a HTTP URL or the content directly
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is_url = utils.is_http_url(configdrive)
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if is_url:
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verify, cert = ipa_utils.get_ssl_client_options(CONF)
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timeout = CONF.image_download_connection_timeout
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# TODO(dtantsur): support proxy parameters from instance_info
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try:
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resp = requests.get(configdrive, verify=verify, cert=cert,
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timeout=timeout)
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except requests.exceptions.RequestException as e:
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raise exception.InstanceDeployFailure(
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"Can't download the configdrive content for node %(node)s "
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"from '%(url)s'. Reason: %(reason)s" %
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{'node': node_uuid, 'url': configdrive, 'reason': e})
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if resp.status_code >= 400:
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raise exception.InstanceDeployFailure(
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"Can't download the configdrive content for node %(node)s "
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"from '%(url)s'. Got status code %(code)s, response "
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"body %(body)s" %
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{'node': node_uuid, 'url': configdrive,
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'code': resp.status_code, 'body': resp.text})
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data = resp.content
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else:
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data = configdrive
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configdrive_file = tempfile.NamedTemporaryFile(delete=False,
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prefix='configdrive',
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dir=tempdir)
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try:
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data = io.BytesIO(base64.b64decode(data))
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except Exception as exc:
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if isinstance(data, bytes):
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LOG.debug('Config drive for node %(node)s is not base64 encoded '
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'(%(error)s), assuming binary',
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{'node': node_uuid, 'error': exc})
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configdrive_mb = int(math.ceil(len(data) / units.Mi))
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configdrive_file.write(data)
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configdrive_file.close()
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return (configdrive_mb, configdrive_file.name)
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else:
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configdrive_file.close()
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utils.unlink_without_raise(configdrive_file.name)
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error_msg = ('Config drive for node %(node)s is not base64 '
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'encoded or the content is malformed. '
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'%(cls)s: %(err)s.'
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% {'node': node_uuid, 'err': exc,
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'cls': type(exc).__name__})
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if is_url:
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error_msg += ' Downloaded from "%s".' % configdrive
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raise exception.InstanceDeployFailure(error_msg)
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configdrive_mb = 0
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with gzip.GzipFile('configdrive', 'rb', fileobj=data) as gunzipped:
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try:
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shutil.copyfileobj(gunzipped, configdrive_file)
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except EnvironmentError as e:
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# Delete the created file
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utils.unlink_without_raise(configdrive_file.name)
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raise exception.InstanceDeployFailure(
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'Encountered error while decompressing and writing '
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'config drive for node %(node)s. Error: %(exc)s' %
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{'node': node_uuid, 'exc': e})
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else:
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# Get the file size and convert to MiB
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configdrive_file.seek(0, os.SEEK_END)
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bytes_ = configdrive_file.tell()
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configdrive_mb = int(math.ceil(float(bytes_) / units.Mi))
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finally:
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configdrive_file.close()
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return (configdrive_mb, configdrive_file.name)
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def get_labelled_partition(device_path, label, node_uuid):
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"""Check and return if partition with given label exists
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:param device_path: The device path.
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:param label: Partition label
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:param node_uuid: UUID of the Node. Used for logging.
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:raises: InstanceDeployFailure, if any disk partitioning related
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commands fail.
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:returns: block device file for partition if it exists; otherwise it
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returns None.
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"""
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disk_utils.partprobe(device_path)
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try:
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output, err = utils.execute('lsblk', '-Po', 'name,label', device_path,
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check_exit_code=[0, 1],
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use_standard_locale=True, run_as_root=True)
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except (processutils.UnknownArgumentError,
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processutils.ProcessExecutionError, OSError) as e:
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msg = ('Failed to retrieve partition labels on disk %(disk)s '
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'for node %(node)s. Error: %(error)s' %
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{'disk': device_path, 'node': node_uuid, 'error': e})
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LOG.error(msg)
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raise exception.InstanceDeployFailure(msg)
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found_part = None
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if output:
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for dev in utils.parse_device_tags(output):
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if dev['LABEL'].upper() == label.upper():
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if found_part:
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found_2 = '/dev/%(part)s' % {'part': dev['NAME'].strip()}
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found = [found_part, found_2]
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raise exception.InstanceDeployFailure(
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'More than one partition with label "%(label)s" '
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'exists on device %(device)s for node %(node)s: '
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'%(found)s.' %
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{'label': label, 'device': device_path,
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'node': node_uuid, 'found': ' and '.join(found)})
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found_part = '/dev/%(part)s' % {'part': dev['NAME'].strip()}
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return found_part
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def work_on_disk(dev, root_mb, swap_mb, ephemeral_mb, ephemeral_format,
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image_path, node_uuid, preserve_ephemeral=False,
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configdrive=None, boot_mode="bios",
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tempdir=None, disk_label=None, cpu_arch="", conv_flags=None):
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"""Create partitions and copy an image to the root partition.
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:param dev: Path for the device to work on.
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:param root_mb: Size of the root partition in megabytes.
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:param swap_mb: Size of the swap partition in megabytes.
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:param ephemeral_mb: Size of the ephemeral partition in megabytes. If 0,
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no ephemeral partition will be created.
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:param ephemeral_format: The type of file system to format the ephemeral
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partition.
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:param image_path: Path for the instance's disk image. If ``None``,
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the root partition is prepared but not populated.
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:param node_uuid: node's uuid. Used for logging.
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:param preserve_ephemeral: If True, no filesystem is written to the
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ephemeral block device, preserving whatever content it had (if the
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partition table has not changed).
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:param configdrive: Optional. Base64 encoded Gzipped configdrive content
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or configdrive HTTP URL.
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:param boot_mode: Can be "bios" or "uefi". "bios" by default.
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:param tempdir: A temporary directory
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:param disk_label: The disk label to be used when creating the
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partition table. Valid values are: "msdos", "gpt" or None; If None
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Ironic will figure it out according to the boot_mode parameter.
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:param cpu_arch: Architecture of the node the disk device belongs to.
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When using the default value of None, no architecture specific
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steps will be taken. This default should be used for x86_64. When
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set to ppc64*, architecture specific steps are taken for booting a
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partition image locally.
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:param conv_flags: Flags that need to be sent to the dd command, to control
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the conversion of the original file when copying to the host. It can
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contain several options separated by commas.
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:returns: a dictionary containing the following keys:
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'root uuid': UUID of root partition
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'efi system partition uuid': UUID of the uefi system partition
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(if boot mode is uefi).
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`partitions`: mapping of partition types to their device paths.
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NOTE: If key exists but value is None, it means partition doesn't
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exist.
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"""
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# the only way for preserve_ephemeral to be set to true is if we are
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# rebuilding an instance with --preserve_ephemeral.
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commit = not preserve_ephemeral
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# now if we are committing the changes to disk clean first.
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if commit:
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disk_utils.destroy_disk_metadata(dev, node_uuid)
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try:
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# If requested, get the configdrive file and determine the size
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# of the configdrive partition
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configdrive_mb = 0
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configdrive_file = None
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if configdrive:
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configdrive_mb, configdrive_file = get_configdrive(
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configdrive, node_uuid, tempdir=tempdir)
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part_dict = disk_utils.make_partitions(dev,
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root_mb, swap_mb, ephemeral_mb,
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configdrive_mb, node_uuid,
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commit=commit,
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boot_option='local',
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boot_mode=boot_mode,
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disk_label=disk_label,
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cpu_arch=cpu_arch)
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LOG.info("Successfully completed the disk device"
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" %(dev)s partitioning for node %(node)s",
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{'dev': dev, "node": node_uuid})
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ephemeral_part = part_dict.get('ephemeral')
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swap_part = part_dict.get('swap')
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configdrive_part = part_dict.get('configdrive')
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root_part = part_dict.get('root')
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if not disk_utils.is_block_device(root_part):
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raise exception.InstanceDeployFailure(
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"Root device '%s' not found" % root_part)
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for part in ('swap', 'ephemeral', 'configdrive',
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'efi system partition', 'PReP Boot partition'):
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part_device = part_dict.get(part)
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LOG.debug("Checking for %(part)s device (%(dev)s) on node "
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"%(node)s.", {'part': part, 'dev': part_device,
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'node': node_uuid})
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if part_device and not disk_utils.is_block_device(part_device):
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raise exception.InstanceDeployFailure(
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"'%(partition)s' device '%(part_device)s' not found" %
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{'partition': part, 'part_device': part_device})
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# If it's a uefi localboot, then we have created the efi system
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# partition. Create a fat filesystem on it.
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if boot_mode == "uefi":
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efi_system_part = part_dict.get('efi system partition')
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utils.mkfs(fs='vfat', path=efi_system_part, label='efi-part')
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if configdrive_part:
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# Copy the configdrive content to the configdrive partition
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disk_utils.dd(configdrive_file, configdrive_part,
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conv_flags=conv_flags)
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LOG.info("Configdrive for node %(node)s successfully copied "
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"onto partition %(partition)s",
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{'node': node_uuid, 'partition': configdrive_part})
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finally:
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# If the configdrive was requested make sure we delete the file
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# after copying the content to the partition
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if configdrive_file:
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utils.unlink_without_raise(configdrive_file)
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if image_path is not None:
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disk_utils.populate_image(image_path, root_part, conv_flags=conv_flags)
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LOG.info("Image for %(node)s successfully populated",
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{'node': node_uuid})
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else:
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LOG.debug("Root partition for %s was created, but not populated",
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node_uuid)
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if swap_part:
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utils.mkfs(fs='swap', path=swap_part, label='swap1')
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LOG.info("Swap partition %(swap)s successfully formatted "
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"for node %(node)s",
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{'swap': swap_part, 'node': node_uuid})
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if ephemeral_part and not preserve_ephemeral:
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utils.mkfs(fs=ephemeral_format, path=ephemeral_part,
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label="ephemeral0")
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LOG.info("Ephemeral partition %(ephemeral)s successfully "
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"formatted for node %(node)s",
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{'ephemeral': ephemeral_part, 'node': node_uuid})
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# Rescan device to get current status (e.g. reflect modification of mkfs)
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disk_utils.trigger_device_rescan(dev)
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uuids_to_return = {
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'root uuid': root_part,
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'efi system partition uuid': part_dict.get('efi system partition'),
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}
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if cpu_arch.startswith('ppc'):
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uuids_to_return[
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'PReP Boot partition uuid'
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] = part_dict.get('PReP Boot partition')
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try:
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for part, part_dev in uuids_to_return.items():
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if part_dev:
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uuids_to_return[part] = disk_utils.block_uuid(part_dev)
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except processutils.ProcessExecutionError:
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with excutils.save_and_reraise_exception():
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LOG.error("Failed to detect %s", part)
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return dict(partitions=part_dict, **uuids_to_return)
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def create_config_drive_partition(node_uuid, device, configdrive):
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"""Create a partition for config drive
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Checks if the device is GPT or MBR partitioned and creates config drive
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partition accordingly.
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:param node_uuid: UUID of the Node.
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:param device: The device path.
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:param configdrive: Base64 encoded Gzipped configdrive content or
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configdrive HTTP URL.
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:raises: InstanceDeployFailure if config drive size exceeds maximum limit
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or if it fails to create config drive.
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"""
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confdrive_file = None
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try:
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config_drive_part = get_labelled_partition(
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device, disk_utils.CONFIGDRIVE_LABEL, node_uuid)
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confdrive_mb, confdrive_file = get_configdrive(configdrive, node_uuid)
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if confdrive_mb > MAX_CONFIG_DRIVE_SIZE_MB:
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raise exception.InstanceDeployFailure(
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'Config drive size exceeds maximum limit of 64MiB. '
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'Size of the given config drive is %(size)d MiB for '
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'node %(node)s.'
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% {'size': confdrive_mb, 'node': node_uuid})
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LOG.debug("Adding config drive partition %(size)d MiB to "
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"device: %(dev)s for node %(node)s",
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{'dev': device, 'size': confdrive_mb, 'node': node_uuid})
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disk_utils.fix_gpt_partition(device, node_uuid)
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if config_drive_part:
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LOG.debug("Configdrive for node %(node)s exists at "
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"%(part)s",
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{'node': node_uuid, 'part': config_drive_part})
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else:
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part_uuid = None
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if disk_utils.get_partition_table_type(device) == 'gpt':
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part_uuid = uuidutils.generate_uuid()
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create_option = '0:-%dMB:0' % MAX_CONFIG_DRIVE_SIZE_MB
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uuid_option = '0:%s' % part_uuid
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utils.execute('sgdisk', '-n', create_option,
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'-u', uuid_option, device,
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run_as_root=True)
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else:
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cur_parts = set(part['number']
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for part in disk_utils.list_partitions(device))
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# Check if the disk has 4 partitions. The MBR based disk
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# cannot have more than 4 partitions.
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# TODO(stendulker): One can use logical partitions to create
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# a config drive if there are 3 primary partitions.
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# https://bugs.launchpad.net/ironic/+bug/1561283
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try:
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pp_count, lp_count = disk_utils.count_mbr_partitions(
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device)
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except ValueError as e:
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raise exception.InstanceDeployFailure(
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'Failed to check the number of primary partitions '
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'present on %(dev)s for node %(node)s. Error: '
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'%(error)s' % {'dev': device, 'node': node_uuid,
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'error': e})
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if pp_count > 3:
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raise exception.InstanceDeployFailure(
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'Config drive cannot be created for node %(node)s. '
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'Disk (%(dev)s) uses MBR partitioning and already '
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'has %(parts)d primary partitions.'
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% {'node': node_uuid, 'dev': device,
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'parts': pp_count})
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# Check if disk size exceeds 2TB msdos limit
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startlimit = '-%dMiB' % MAX_CONFIG_DRIVE_SIZE_MB
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endlimit = '-0'
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if _is_disk_larger_than_max_size(device, node_uuid):
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# Need to create a small partition at 2TB limit
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LOG.warning("Disk size is larger than 2TB for "
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"node %(node)s. Creating config drive "
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"at the end of the disk %(disk)s.",
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{'node': node_uuid, 'disk': device})
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startlimit = (MAX_DISK_SIZE_MB_SUPPORTED_BY_MBR
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- MAX_CONFIG_DRIVE_SIZE_MB - 1)
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endlimit = MAX_DISK_SIZE_MB_SUPPORTED_BY_MBR - 1
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utils.execute('parted', '-a', 'optimal', '-s', '--', device,
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'mkpart', 'primary', 'fat32', startlimit,
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endlimit, run_as_root=True)
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# Trigger device rescan
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disk_utils.trigger_device_rescan(device)
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if part_uuid is None:
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new_parts = {part['number']: part
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for part in disk_utils.list_partitions(device)}
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new_part = set(new_parts) - set(cur_parts)
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if len(new_part) != 1:
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raise exception.InstanceDeployFailure(
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'Disk partitioning failed on device %(device)s. '
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'Unable to retrieve config drive partition '
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'information.' % {'device': device})
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config_drive_part = disk_utils.partition_index_to_path(
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device, new_part.pop())
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else:
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try:
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config_drive_part = get_partition(device, part_uuid)
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except errors.DeviceNotFound:
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msg = ('Failed to create config drive on disk %(disk)s '
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'for node %(node)s. Partition with UUID %(uuid)s '
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'has not been found after creation.') % {
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'disk': device, 'node': node_uuid,
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'uuid': part_uuid}
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LOG.error(msg)
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raise exception.InstanceDeployFailure(msg)
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disk_utils.udev_settle()
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# NOTE(vsaienko): check that devise actually exists,
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# it is not handled by udevadm when using ISCSI, for more info see:
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|
# 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)
|
|
|
|
|
|
def _is_disk_larger_than_max_size(device, node_uuid):
|
|
"""Check if total disk size exceeds 2TB msdos limit
|
|
|
|
:param device: device path.
|
|
:param node_uuid: node's uuid. Used for logging.
|
|
:raises: InstanceDeployFailure, if any disk partitioning related
|
|
commands fail.
|
|
:returns: True if total disk size exceeds 2TB. Returns False otherwise.
|
|
"""
|
|
try:
|
|
disksize_bytes, err = utils.execute('blockdev', '--getsize64',
|
|
device,
|
|
use_standard_locale=True,
|
|
run_as_root=True)
|
|
except (processutils.UnknownArgumentError,
|
|
processutils.ProcessExecutionError, OSError) as e:
|
|
msg = ('Failed to get size of disk %(disk)s for node %(node)s. '
|
|
'Error: %(error)s' %
|
|
{'disk': device, 'node': node_uuid, 'error': e})
|
|
LOG.error(msg)
|
|
raise exception.InstanceDeployFailure(msg)
|
|
|
|
disksize_mb = int(disksize_bytes.strip()) // 1024 // 1024
|
|
|
|
return disksize_mb > MAX_DISK_SIZE_MB_SUPPORTED_BY_MBR
|
|
|
|
|
|
def get_partition(device, uuid):
|
|
"""Find the partition of a given device."""
|
|
LOG.debug("Find the partition %(uuid)s on device %(dev)s",
|
|
{'dev': device, 'uuid': uuid})
|
|
|
|
try:
|
|
ipa_utils.rescan_device(device)
|
|
lsblk = utils.execute(
|
|
'lsblk', '-PbioKNAME,UUID,PARTUUID,TYPE,LABEL', device)
|
|
report = lsblk[0]
|
|
for line in report.split('\n'):
|
|
part = {}
|
|
# Split into KEY=VAL pairs
|
|
vals = shlex.split(line)
|
|
for key, val in (v.split('=', 1) for v in vals):
|
|
part[key] = val.strip()
|
|
# Ignore non partition
|
|
if part.get('TYPE') not in ['md', 'part']:
|
|
# NOTE(TheJulia): This technically creates an edge failure
|
|
# case where a filesystem on a whole block device sans
|
|
# partitioning would behave differently.
|
|
continue
|
|
|
|
if part.get('UUID') == uuid:
|
|
LOG.debug("Partition %(uuid)s found on device "
|
|
"%(dev)s", {'uuid': uuid, 'dev': device})
|
|
return '/dev/' + part.get('KNAME')
|
|
if part.get('PARTUUID') == uuid:
|
|
LOG.debug("Partition %(uuid)s found on device "
|
|
"%(dev)s", {'uuid': uuid, 'dev': device})
|
|
return '/dev/' + part.get('KNAME')
|
|
if part.get('LABEL') == uuid:
|
|
LOG.debug("Partition %(uuid)s found on device "
|
|
"%(dev)s", {'uuid': uuid, 'dev': device})
|
|
return '/dev/' + part.get('KNAME')
|
|
else:
|
|
# NOTE(TheJulia): We may want to consider moving towards using
|
|
# findfs in the future, if we're comfortable with the execution
|
|
# and interaction. There is value in either way though.
|
|
# NOTE(rg): alternative: blkid -l -t UUID=/PARTUUID=
|
|
try:
|
|
findfs, stderr = utils.execute('findfs', 'UUID=%s' % uuid)
|
|
return findfs.strip()
|
|
except processutils.ProcessExecutionError as e:
|
|
LOG.debug('First fallback detection attempt for locating '
|
|
'partition via UUID %(uuid)s failed. '
|
|
'Error: %(err)s',
|
|
{'uuid': uuid,
|
|
'err': e})
|
|
try:
|
|
findfs, stderr = utils.execute(
|
|
'findfs', 'PARTUUID=%s' % uuid)
|
|
return findfs.strip()
|
|
except processutils.ProcessExecutionError as e:
|
|
LOG.debug('Secondary fallback detection attempt for '
|
|
'locating partition via UUID %(uuid)s failed. '
|
|
'Error: %(err)s',
|
|
{'uuid': uuid,
|
|
'err': e})
|
|
|
|
# Last fallback: In case we cannot find the partition by UUID
|
|
# and the deploy device is an md device, we check if the md
|
|
# device has a partition (which we assume to contain the root fs).
|
|
if hardware.is_md_device(device):
|
|
md_partition = device + 'p1'
|
|
if (os.path.exists(md_partition)
|
|
and stat.S_ISBLK(os.stat(md_partition).st_mode)):
|
|
LOG.debug("Found md device with partition %s",
|
|
md_partition)
|
|
return md_partition
|
|
else:
|
|
LOG.debug('Could not find partition %(part)s on md '
|
|
'device %(dev)s',
|
|
{'part': md_partition,
|
|
'dev': device})
|
|
|
|
# Partition not found, time to escalate.
|
|
error_msg = ("No partition with UUID %(uuid)s found on "
|
|
"device %(dev)s" % {'uuid': uuid, 'dev': device})
|
|
LOG.error(error_msg)
|
|
raise errors.DeviceNotFound(error_msg)
|
|
except processutils.ProcessExecutionError as e:
|
|
error_msg = ('Finding the partition with UUID %(uuid)s on '
|
|
'device %(dev)s failed with %(err)s' %
|
|
{'uuid': uuid, 'dev': device, 'err': e})
|
|
LOG.error(error_msg)
|
|
raise errors.CommandExecutionError(error_msg)
|