144 lines
5.6 KiB
Python
144 lines
5.6 KiB
Python
# Copyright 2014 Red Hat, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import logging
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from oslo_config import cfg
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from ironic_lib.common.i18n import _
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from ironic_lib import exception
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from ironic_lib import utils
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opts = [
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cfg.IntOpt('check_device_interval',
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default=1,
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help='After Ironic has completed creating the partition table, '
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'it continues to check for activity on the attached iSCSI '
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'device status at this interval prior to copying the image'
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' to the node, in seconds'),
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cfg.IntOpt('check_device_max_retries',
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default=20,
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help='The maximum number of times to check that the device is '
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'not accessed by another process. If the device is still '
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'busy after that, the disk partitioning will be treated as'
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' having failed.')
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]
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CONF = cfg.CONF
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opt_group = cfg.OptGroup(name='disk_partitioner',
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title='Options for the disk partitioner')
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CONF.register_group(opt_group)
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CONF.register_opts(opts, opt_group)
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LOG = logging.getLogger(__name__)
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class DiskPartitioner(object):
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def __init__(self, device, disk_label='msdos', alignment='optimal'):
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"""A convenient wrapper around the parted tool.
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:param device: The device path.
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:param disk_label: The type of the partition table. Valid types are:
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"bsd", "dvh", "gpt", "loop", "mac", "msdos",
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"pc98", or "sun".
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:param alignment: Set alignment for newly created partitions.
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Valid types are: none, cylinder, minimal and
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optimal.
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"""
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self._device = device
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self._disk_label = disk_label
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self._alignment = alignment
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self._partitions = []
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def _exec(self, *args):
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# NOTE(lucasagomes): utils.execute() is already a wrapper on top
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# of processutils.execute() which raises specific
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# exceptions. It also logs any failure so we don't
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# need to log it again here.
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utils.execute('parted', '-a', self._alignment, '-s', self._device,
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'--', 'unit', 'MiB', *args, use_standard_locale=True,
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run_as_root=True)
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def add_partition(self, size, part_type='primary', fs_type='',
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boot_flag=None, extra_flags=None):
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"""Add a partition.
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:param size: The size of the partition in MiB.
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:param part_type: The type of the partition. Valid values are:
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primary, logical, or extended.
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:param fs_type: The filesystem type. Valid types are: ext2, fat32,
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fat16, HFS, linux-swap, NTFS, reiserfs, ufs.
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If blank (''), it will create a Linux native
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partition (83).
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:param boot_flag: Boot flag that needs to be configured on the
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partition. Ignored if None. It can take values
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'bios_grub', 'boot'.
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:param extra_flags: List of flags to set on the partition. Ignored
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if None.
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:returns: The partition number.
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"""
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self._partitions.append({'size': size,
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'type': part_type,
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'fs_type': fs_type,
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'boot_flag': boot_flag,
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'extra_flags': extra_flags})
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return len(self._partitions)
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def get_partitions(self):
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"""Get the partitioning layout.
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:returns: An iterator with the partition number and the
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partition layout.
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"""
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return enumerate(self._partitions, 1)
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def commit(self):
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"""Write to the disk."""
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LOG.debug("Committing partitions to disk.")
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cmd_args = ['mklabel', self._disk_label]
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# NOTE(lucasagomes): Lead in with 1MiB to allow room for the
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# partition table itself.
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start = 1
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for num, part in self.get_partitions():
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end = start + part['size']
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cmd_args.extend(['mkpart', part['type'], part['fs_type'],
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str(start), str(end)])
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if part['boot_flag']:
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cmd_args.extend(['set', str(num), part['boot_flag'], 'on'])
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if part['extra_flags']:
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for flag in part['extra_flags']:
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cmd_args.extend(['set', str(num), flag, 'on'])
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start = end
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self._exec(*cmd_args)
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try:
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utils.wait_for_disk_to_become_available(self._device)
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except exception.IronicException as e:
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raise exception.InstanceDeployFailure(
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_('Disk partitioning failed on device %(device)s. '
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'Error: %(error)s')
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% {'device': self._device, 'error': e})
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def list_opts():
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"""Entry point for oslo-config-generator."""
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return [('disk_partitioner', opts)]
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