753a87c4bb
0.90 will be used for centos only letting GRUB-legacy to boot. Otherwise, default (1.2) will be used as GRUB2 is able to deal with it. Change-Id: I89c5178d991970de4682c1e239e0ecb014ba61bd Closes-Bug: #1430432
271 lines
9.5 KiB
Python
271 lines
9.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015 Mirantis, Inc.
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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 os
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from fuel_agent import errors
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from fuel_agent.objects.partition.fs import FileSystem
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from fuel_agent.objects.partition.lv import LogicalVolume
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from fuel_agent.objects.partition.md import MultipleDevice
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from fuel_agent.objects.partition.parted import Parted
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from fuel_agent.objects.partition.pv import PhysicalVolume
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from fuel_agent.objects.partition.vg import VolumeGroup
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from fuel_agent.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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class PartitionScheme(object):
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def __init__(self):
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self.parteds = []
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self.mds = []
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self.pvs = []
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self.vgs = []
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self.lvs = []
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self.fss = []
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def add_parted(self, **kwargs):
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parted = Parted(**kwargs)
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self.parteds.append(parted)
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return parted
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def add_pv(self, **kwargs):
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pv = PhysicalVolume(**kwargs)
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self.pvs.append(pv)
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return pv
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def add_vg(self, **kwargs):
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vg = VolumeGroup(**kwargs)
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self.vgs.append(vg)
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return vg
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def add_lv(self, **kwargs):
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lv = LogicalVolume(**kwargs)
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self.lvs.append(lv)
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return lv
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def add_fs(self, **kwargs):
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fs = FileSystem(**kwargs)
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self.fss.append(fs)
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return fs
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def add_md(self, **kwargs):
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mdkwargs = {}
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mdkwargs['name'] = kwargs.get('name') or self.md_next_name()
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mdkwargs['level'] = kwargs.get('level') or 'mirror'
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mdkwargs['metadata'] = kwargs.get('metadata') or 'default'
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md = MultipleDevice(**mdkwargs)
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self.mds.append(md)
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return md
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def md_by_name(self, name):
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found = filter(lambda x: x.name == name, self.mds)
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if found:
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return found[0]
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def md_by_mount(self, mount):
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fs = self.fs_by_mount(mount)
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if fs:
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return self.md_by_name(fs.device)
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def md_attach_by_mount(self, device, mount, spare=False, **kwargs):
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md = self.md_by_mount(mount)
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if not md:
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md = self.add_md(**kwargs)
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fskwargs = {}
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fskwargs['device'] = md.name
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fskwargs['mount'] = mount
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fskwargs['fs_type'] = kwargs.pop('fs_type', None)
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fskwargs['fs_options'] = kwargs.pop('fs_options', None)
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fskwargs['fs_label'] = kwargs.pop('fs_label', None)
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self.add_fs(**fskwargs)
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md.add_spare(device) if spare else md.add_device(device)
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return md
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def md_next_name(self):
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count = 0
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while True:
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name = '/dev/md%s' % count
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if name not in [md.name for md in self.mds]:
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return name
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if count >= 127:
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raise errors.MDAlreadyExistsError(
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'Error while generating md name: '
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'names from /dev/md0 to /dev/md127 seem to be busy, '
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'try to generate md name manually')
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count += 1
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def partition_by_name(self, name):
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return next((parted.partition_by_name(name)
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for parted in self.parteds
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if parted.partition_by_name(name)), None)
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def vg_by_name(self, vgname):
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found = filter(lambda x: (x.name == vgname), self.vgs)
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if found:
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return found[0]
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def pv_by_name(self, pvname):
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found = filter(lambda x: (x.name == pvname), self.pvs)
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if found:
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return found[0]
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def vg_attach_by_name(self, pvname, vgname,
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metadatasize=16, metadatacopies=2):
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vg = self.vg_by_name(vgname) or self.add_vg(name=vgname)
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pv = self.pv_by_name(pvname) or self.add_pv(
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name=pvname, metadatasize=metadatasize,
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metadatacopies=metadatacopies)
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vg.add_pv(pv.name)
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def fs_by_mount(self, mount):
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found = filter(lambda x: (x.mount and x.mount == mount), self.fss)
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if found:
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return found[0]
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def fs_by_device(self, device):
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found = filter(lambda x: x.device == device, self.fss)
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if found:
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return found[0]
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def fs_sorted_by_depth(self, reverse=False):
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"""Getting file systems sorted by path length.
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Shorter paths earlier.
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['/', '/boot', '/var', '/var/lib/mysql']
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:param reverse: Sort backward (Default: False)
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"""
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def key(x):
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return x.mount.rstrip(os.path.sep).count(os.path.sep)
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return sorted(self.fss, key=key, reverse=reverse)
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def lv_by_device_name(self, device_name):
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found = filter(lambda x: x.device_name == device_name, self.lvs)
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if found:
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return found[0]
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def root_device(self):
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fs = self.fs_by_mount('/')
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if not fs:
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raise errors.WrongPartitionSchemeError(
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'Error while trying to find root device: '
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'root file system not found')
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return fs.device
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def boot_device(self, grub_version=2):
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# We assume /boot is a separate partition. If it is not
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# then we try to use root file system
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boot_fs = self.fs_by_mount('/boot') or self.fs_by_mount('/')
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if not boot_fs:
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raise errors.WrongPartitionSchemeError(
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'Error while trying to find boot device: '
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'boot file system not fount, '
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'it must be a separate mount point')
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if grub_version == 1:
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# Legacy GRUB has a limitation. It is not able to mount MD devices.
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# If it is MD compatible it is only able to ignore MD metadata
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# and to mount one of those devices which are parts of MD device,
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# but it is possible only if MD device is a MIRROR.
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md = self.md_by_name(boot_fs.device)
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if md:
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try:
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return md.devices[0]
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except IndexError:
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raise errors.WrongPartitionSchemeError(
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'Error while trying to find boot device: '
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'md device %s does not have devices attached' %
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md.name)
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# Legacy GRUB is not able to mount LVM devices.
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if self.lv_by_device_name(boot_fs.device):
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raise errors.WrongPartitionSchemeError(
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'Error while trying to find boot device: '
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'found device is %s but legacy grub is not able to '
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'mount logical volumes' %
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boot_fs.device)
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return boot_fs.device
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def configdrive_device(self):
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# Configdrive device must be a small (about 10M) partition
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# on one of node hard drives. This partition is necessary
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# only if one uses cloud-init with configdrive.
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for parted in self.parteds:
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for prt in parted.partitions:
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if prt.configdrive:
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return prt.name
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def elevate_keep_data(self):
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LOG.debug('Elevate keep_data flag from partitions')
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for vg in self.vgs:
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for pvname in vg.pvnames:
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partition = self.partition_by_name(pvname)
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if partition and partition.keep_data:
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partition.keep_data = False
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vg.keep_data = True
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LOG.debug('Set keep_data to vg=%s' % vg.name)
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for lv in self.lvs:
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vg = self.vg_by_name(lv.vgname)
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if vg.keep_data:
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lv.keep_data = True
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# Need to loop over lv again to remove keep flag from vg
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for lv in self.lvs:
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vg = self.vg_by_name(lv.vgname)
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if vg.keep_data and lv.keep_data:
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vg.keep_data = False
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for fs in self.fss:
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lv = self.lv_by_device_name(fs.device)
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if lv:
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if lv.keep_data:
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lv.keep_data = False
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fs.keep_data = True
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LOG.debug('Set keep_data to fs=%s from lv=%s' %
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(fs.mount, lv.name))
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continue
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partition = self.partition_by_name(fs.device)
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if partition and partition.keep_data:
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partition.keep_data = False
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fs.keep_data = True
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LOG.debug('Set keep flag to fs=%s from partition=%s' %
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(fs.mount, partition.name))
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@property
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def skip_partitioning(self):
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if any(fs.keep_data for fs in self.fss):
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return True
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if any(lv.keep_data for lv in self.lvs):
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return True
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if any(vg.keep_data for vg in self.vgs):
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return True
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for parted in self.parteds:
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if any(prt.keep_data for prt in parted.partitions):
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return True
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def to_dict(self):
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return {
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'parteds': [parted.to_dict() for parted in self.parteds],
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'mds': [md.to_dict() for md in self.mds],
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'pvs': [pv.to_dict() for pv in self.pvs],
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'vgs': [vg.to_dict() for vg in self.vgs],
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'lvs': [lv.to_dict() for lv in self.lvs],
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'fss': [fs.to_dict() for fs in self.fss],
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}
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