root / image_creator / bundle_volume.py @ 1fa75c4c
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1 | 9e4b4de2 | Nikos Skalkotos | # Copyright 2012 GRNET S.A. All rights reserved.
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2 | 9e4b4de2 | Nikos Skalkotos | #
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3 | 9e4b4de2 | Nikos Skalkotos | # Redistribution and use in source and binary forms, with or
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4 | 9e4b4de2 | Nikos Skalkotos | # without modification, are permitted provided that the following
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5 | 9e4b4de2 | Nikos Skalkotos | # conditions are met:
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6 | 9e4b4de2 | Nikos Skalkotos | #
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7 | 9e4b4de2 | Nikos Skalkotos | # 1. Redistributions of source code must retain the above
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8 | 9e4b4de2 | Nikos Skalkotos | # copyright notice, this list of conditions and the following
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9 | 9e4b4de2 | Nikos Skalkotos | # disclaimer.
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10 | 9e4b4de2 | Nikos Skalkotos | #
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11 | 9e4b4de2 | Nikos Skalkotos | # 2. Redistributions in binary form must reproduce the above
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12 | 9e4b4de2 | Nikos Skalkotos | # copyright notice, this list of conditions and the following
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13 | 9e4b4de2 | Nikos Skalkotos | # disclaimer in the documentation and/or other materials
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14 | 9e4b4de2 | Nikos Skalkotos | # provided with the distribution.
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15 | 9e4b4de2 | Nikos Skalkotos | #
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16 | 9e4b4de2 | Nikos Skalkotos | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 9e4b4de2 | Nikos Skalkotos | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 9e4b4de2 | Nikos Skalkotos | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 9e4b4de2 | Nikos Skalkotos | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 9e4b4de2 | Nikos Skalkotos | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 9e4b4de2 | Nikos Skalkotos | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 9e4b4de2 | Nikos Skalkotos | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 9e4b4de2 | Nikos Skalkotos | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 9e4b4de2 | Nikos Skalkotos | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 9e4b4de2 | Nikos Skalkotos | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 9e4b4de2 | Nikos Skalkotos | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 9e4b4de2 | Nikos Skalkotos | # POSSIBILITY OF SUCH DAMAGE.
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28 | 9e4b4de2 | Nikos Skalkotos | #
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29 | 9e4b4de2 | Nikos Skalkotos | # The views and conclusions contained in the software and
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30 | 9e4b4de2 | Nikos Skalkotos | # documentation are those of the authors and should not be
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31 | 9e4b4de2 | Nikos Skalkotos | # interpreted as representing official policies, either expressed
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32 | 9e4b4de2 | Nikos Skalkotos | # or implied, of GRNET S.A.
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33 | 9e4b4de2 | Nikos Skalkotos | |
34 | 27a4229d | Nikos Skalkotos | import os |
35 | 27a4229d | Nikos Skalkotos | import re |
36 | 8eea5572 | Nikos Skalkotos | import tempfile |
37 | 9517bf29 | Nikos Skalkotos | from collections import namedtuple |
38 | 27a4229d | Nikos Skalkotos | |
39 | 8eea5572 | Nikos Skalkotos | import parted |
40 | 8eea5572 | Nikos Skalkotos | |
41 | 74149d07 | Nikos Skalkotos | from image_creator.rsync import Rsync |
42 | 27a4229d | Nikos Skalkotos | from image_creator.util import get_command |
43 | 9e4b4de2 | Nikos Skalkotos | from image_creator.util import FatalError |
44 | f3845095 | Nikos Skalkotos | from image_creator.util import try_fail_repeat |
45 | 9e4b4de2 | Nikos Skalkotos | |
46 | 27a4229d | Nikos Skalkotos | findfs = get_command('findfs')
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47 | 27a4229d | Nikos Skalkotos | dd = get_command('dd')
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48 | 8eea5572 | Nikos Skalkotos | dmsetup = get_command('dmsetup')
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49 | 25b4d858 | Nikos Skalkotos | losetup = get_command('losetup')
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50 | 25b4d858 | Nikos Skalkotos | mount = get_command('mount')
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51 | 25b4d858 | Nikos Skalkotos | umount = get_command('umount')
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52 | bf15a033 | Nikos Skalkotos | blkid = get_command('blkid')
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53 | 25b4d858 | Nikos Skalkotos | |
54 | 6228d45e | Nikos Skalkotos | MKFS_OPTS = {'ext2': ['-F'], |
55 | 6228d45e | Nikos Skalkotos | 'ext3': ['-F'], |
56 | 6228d45e | Nikos Skalkotos | 'ext4': ['-F'], |
57 | 6228d45e | Nikos Skalkotos | 'reiserfs': ['-ff'], |
58 | 6228d45e | Nikos Skalkotos | 'btrfs': [],
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59 | 6228d45e | Nikos Skalkotos | 'minix': [],
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60 | 6228d45e | Nikos Skalkotos | 'xfs': ['-f'], |
61 | 6228d45e | Nikos Skalkotos | 'jfs': ['-f'], |
62 | 6228d45e | Nikos Skalkotos | 'ntfs': ['-F'], |
63 | 6228d45e | Nikos Skalkotos | 'msdos': [],
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64 | 6228d45e | Nikos Skalkotos | 'vfat': []}
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65 | 9517bf29 | Nikos Skalkotos | |
66 | 9517bf29 | Nikos Skalkotos | |
67 | f3845095 | Nikos Skalkotos | class BundleVolume(object): |
68 | f3845095 | Nikos Skalkotos | """This class can be used to create an image out of the running system"""
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69 | 27a4229d | Nikos Skalkotos | |
70 | 8eea5572 | Nikos Skalkotos | def __init__(self, out, meta): |
71 | f3845095 | Nikos Skalkotos | """Create an instance of the BundleVolume class."""
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72 | 8eea5572 | Nikos Skalkotos | self.out = out
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73 | 8eea5572 | Nikos Skalkotos | self.meta = meta
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74 | 27a4229d | Nikos Skalkotos | |
75 | a939e3b8 | Nikos Skalkotos | self.out.output('Searching for root device ...', False) |
76 | 8eea5572 | Nikos Skalkotos | root = self._get_root_partition()
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77 | 27a4229d | Nikos Skalkotos | |
78 | 8eea5572 | Nikos Skalkotos | if root.startswith("UUID=") or root.startswith("LABEL="): |
79 | 25b4d858 | Nikos Skalkotos | root = findfs(root).stdout.strip() |
80 | 27a4229d | Nikos Skalkotos | |
81 | 25b4d858 | Nikos Skalkotos | if not re.match('/dev/[hsv]d[a-z][1-9]*$', root): |
82 | 25b4d858 | Nikos Skalkotos | raise FatalError("Don't know how to handle root device: %s" % root) |
83 | 9517bf29 | Nikos Skalkotos | |
84 | 25b4d858 | Nikos Skalkotos | out.success(root) |
85 | 9517bf29 | Nikos Skalkotos | |
86 | 25b4d858 | Nikos Skalkotos | disk_file = re.split('[0-9]', root)[0] |
87 | 25b4d858 | Nikos Skalkotos | device = parted.Device(disk_file) |
88 | 25b4d858 | Nikos Skalkotos | self.disk = parted.Disk(device)
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89 | 9517bf29 | Nikos Skalkotos | |
90 | a939e3b8 | Nikos Skalkotos | def _read_fstable(self, f): |
91 | 25b4d858 | Nikos Skalkotos | |
92 | 8eea5572 | Nikos Skalkotos | if not os.path.isfile(f): |
93 | 8eea5572 | Nikos Skalkotos | raise FatalError("Unable to open: `%s'. File is missing." % f) |
94 | 27a4229d | Nikos Skalkotos | |
95 | 74149d07 | Nikos Skalkotos | FileSystemTableEntry = namedtuple('FileSystemTableEntry',
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96 | 6228d45e | Nikos Skalkotos | 'dev mpoint fs opts freq passno')
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97 | 8eea5572 | Nikos Skalkotos | with open(f) as table: |
98 | 8eea5572 | Nikos Skalkotos | for line in iter(table): |
99 | 8eea5572 | Nikos Skalkotos | entry = line.split('#')[0].strip().split() |
100 | 8eea5572 | Nikos Skalkotos | if len(entry) != 6: |
101 | 8eea5572 | Nikos Skalkotos | continue
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102 | 74149d07 | Nikos Skalkotos | yield FileSystemTableEntry(*entry)
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103 | 27a4229d | Nikos Skalkotos | |
104 | a939e3b8 | Nikos Skalkotos | def _get_root_partition(self): |
105 | 8eea5572 | Nikos Skalkotos | for entry in self._read_fstable('/etc/fstab'): |
106 | 8eea5572 | Nikos Skalkotos | if entry.mpoint == '/': |
107 | 8eea5572 | Nikos Skalkotos | return entry.dev
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108 | 27a4229d | Nikos Skalkotos | |
109 | 8eea5572 | Nikos Skalkotos | raise FatalError("Unable to find root device in /etc/fstab") |
110 | 27a4229d | Nikos Skalkotos | |
111 | a939e3b8 | Nikos Skalkotos | def _is_mpoint(self, path): |
112 | a939e3b8 | Nikos Skalkotos | for entry in self._read_fstable('/proc/mounts'): |
113 | 8eea5572 | Nikos Skalkotos | if entry.mpoint == path:
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114 | 8eea5572 | Nikos Skalkotos | return True |
115 | 8eea5572 | Nikos Skalkotos | return False |
116 | 27a4229d | Nikos Skalkotos | |
117 | 25b4d858 | Nikos Skalkotos | def _get_mount_options(self, device): |
118 | a939e3b8 | Nikos Skalkotos | for entry in self._read_fstable('/proc/mounts'): |
119 | 8eea5572 | Nikos Skalkotos | if not entry.dev.startswith('/'): |
120 | 8eea5572 | Nikos Skalkotos | continue
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121 | 9517bf29 | Nikos Skalkotos | |
122 | 8eea5572 | Nikos Skalkotos | if os.path.realpath(entry.dev) == os.path.realpath(device):
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123 | 8eea5572 | Nikos Skalkotos | return entry
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124 | 9517bf29 | Nikos Skalkotos | |
125 | 25b4d858 | Nikos Skalkotos | return None |
126 | 9517bf29 | Nikos Skalkotos | |
127 | 25b4d858 | Nikos Skalkotos | def _create_partition_table(self, image): |
128 | 8eea5572 | Nikos Skalkotos | |
129 | 25b4d858 | Nikos Skalkotos | if self.disk.type != 'msdos': |
130 | 8eea5572 | Nikos Skalkotos | raise FatalError('Only msdos partition tables are supported') |
131 | 8eea5572 | Nikos Skalkotos | |
132 | 8eea5572 | Nikos Skalkotos | # Copy the MBR and the space between the MBR and the first partition.
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133 | 8eea5572 | Nikos Skalkotos | # In Grub version 1 Stage 1.5 is located there.
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134 | 25b4d858 | Nikos Skalkotos | first_sector = self.disk.getPrimaryPartitions()[0].geometry.start |
135 | 8eea5572 | Nikos Skalkotos | |
136 | 25b4d858 | Nikos Skalkotos | dd('if=%s' % self.disk.device.path, 'of=%s' % image, |
137 | 25b4d858 | Nikos Skalkotos | 'bs=%d' % self.disk.device.sectorSize, |
138 | 8eea5572 | Nikos Skalkotos | 'count=%d' % first_sector, 'conv=notrunc') |
139 | 8eea5572 | Nikos Skalkotos | |
140 | 8eea5572 | Nikos Skalkotos | # Create the Extended boot records (EBRs) in the image
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141 | 25b4d858 | Nikos Skalkotos | extended = self.disk.getExtendedPartition()
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142 | 8eea5572 | Nikos Skalkotos | if not extended: |
143 | 8eea5572 | Nikos Skalkotos | return
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144 | 8eea5572 | Nikos Skalkotos | |
145 | 8eea5572 | Nikos Skalkotos | # Extended boot records precede the logical partitions they describe
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146 | 25b4d858 | Nikos Skalkotos | logical = self.disk.getLogicalPartitions()
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147 | 8eea5572 | Nikos Skalkotos | start = extended.geometry.start |
148 | 8eea5572 | Nikos Skalkotos | for i in range(len(logical)): |
149 | 8eea5572 | Nikos Skalkotos | end = logical[i].geometry.start - 1
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150 | 25b4d858 | Nikos Skalkotos | dd('if=%s' % self.disk.device.path, 'of=%s' % image, |
151 | 8eea5572 | Nikos Skalkotos | 'count=%d' % (end - start + 1), 'conv=notrunc', |
152 | 8eea5572 | Nikos Skalkotos | 'seek=%d' % start, 'skip=%d' % start) |
153 | 8eea5572 | Nikos Skalkotos | start = logical[i].geometry.end + 1
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154 | 8eea5572 | Nikos Skalkotos | |
155 | 25b4d858 | Nikos Skalkotos | def _get_partitions(self, disk): |
156 | 25b4d858 | Nikos Skalkotos | Partition = namedtuple('Partition', 'num start end type fs') |
157 | 8eea5572 | Nikos Skalkotos | |
158 | 8eea5572 | Nikos Skalkotos | partitions = [] |
159 | 25b4d858 | Nikos Skalkotos | for p in disk.partitions: |
160 | 25b4d858 | Nikos Skalkotos | num = p.number |
161 | 25b4d858 | Nikos Skalkotos | start = p.geometry.start |
162 | 25b4d858 | Nikos Skalkotos | end = p.geometry.end |
163 | 25b4d858 | Nikos Skalkotos | ptype = p.type |
164 | 25b4d858 | Nikos Skalkotos | fs = p.fileSystem.type if p.fileSystem is not None else '' |
165 | 25b4d858 | Nikos Skalkotos | partitions.append(Partition(num, start, end, ptype, fs)) |
166 | 25b4d858 | Nikos Skalkotos | |
167 | 25b4d858 | Nikos Skalkotos | return partitions
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168 | 25b4d858 | Nikos Skalkotos | |
169 | 25b4d858 | Nikos Skalkotos | def _shrink_partitions(self, image): |
170 | 8eea5572 | Nikos Skalkotos | |
171 | 25b4d858 | Nikos Skalkotos | new_end = self.disk.device.getLength()
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172 | 25b4d858 | Nikos Skalkotos | |
173 | 25b4d858 | Nikos Skalkotos | image_dev = parted.Device(image) |
174 | a939e3b8 | Nikos Skalkotos | image_disk = parted.Disk(image_dev) |
175 | a939e3b8 | Nikos Skalkotos | |
176 | a939e3b8 | Nikos Skalkotos | is_extended = lambda p: p.type == parted.PARTITION_EXTENDED
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177 | a939e3b8 | Nikos Skalkotos | is_logical = lambda p: p.type == parted.PARTITION_LOGICAL
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178 | a939e3b8 | Nikos Skalkotos | |
179 | 25b4d858 | Nikos Skalkotos | partitions = self._get_partitions(self.disk) |
180 | a939e3b8 | Nikos Skalkotos | |
181 | a939e3b8 | Nikos Skalkotos | last = partitions[-1]
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182 | a939e3b8 | Nikos Skalkotos | if last.fs == 'linux-swap(v1)': |
183 | a939e3b8 | Nikos Skalkotos | MB = 2 ** 20 |
184 | 25b4d858 | Nikos Skalkotos | size = (last.end - last.start + 1) * self.disk.device.sectorSize |
185 | a939e3b8 | Nikos Skalkotos | self.meta['SWAP'] = "%d:%s" % (last.num, (size + MB - 1) // MB) |
186 | a939e3b8 | Nikos Skalkotos | |
187 | a939e3b8 | Nikos Skalkotos | image_disk.deletePartition( |
188 | a939e3b8 | Nikos Skalkotos | image_disk.getPartitionBySector(last.start)) |
189 | a939e3b8 | Nikos Skalkotos | image_disk.commit() |
190 | a939e3b8 | Nikos Skalkotos | |
191 | a939e3b8 | Nikos Skalkotos | if is_logical(last) and last.num == 5: |
192 | a939e3b8 | Nikos Skalkotos | extended = image_disk.getExtendedPartition() |
193 | a939e3b8 | Nikos Skalkotos | image_disk.deletePartition(extended) |
194 | a939e3b8 | Nikos Skalkotos | image_disk.commit() |
195 | a939e3b8 | Nikos Skalkotos | partitions.remove(filter(is_extended, partitions)[0]) |
196 | a939e3b8 | Nikos Skalkotos | |
197 | a939e3b8 | Nikos Skalkotos | partitions.remove(last) |
198 | a939e3b8 | Nikos Skalkotos | last = partitions[-1]
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199 | a939e3b8 | Nikos Skalkotos | |
200 | a939e3b8 | Nikos Skalkotos | # Leave 2048 blocks at the end
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201 | a939e3b8 | Nikos Skalkotos | new_end = last.end + 2048
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202 | a939e3b8 | Nikos Skalkotos | |
203 | 25b4d858 | Nikos Skalkotos | mount_options = self._get_mount_options(
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204 | 6228d45e | Nikos Skalkotos | self.disk.getPartitionBySector(last.start).path)
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205 | 74149d07 | Nikos Skalkotos | if mount_options is not None: |
206 | 25b4d858 | Nikos Skalkotos | stat = os.statvfs(mount_options.mpoint) |
207 | 25b4d858 | Nikos Skalkotos | # Shrink the last partition. The new size should be the size of the
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208 | 25b4d858 | Nikos Skalkotos | # occupied blocks
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209 | a939e3b8 | Nikos Skalkotos | blcks = stat.f_blocks - stat.f_bavail |
210 | 25b4d858 | Nikos Skalkotos | new_size = (blcks * stat.f_frsize) // self.disk.device.sectorSize
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211 | a939e3b8 | Nikos Skalkotos | |
212 | a939e3b8 | Nikos Skalkotos | # Add 10% just to be on the safe side
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213 | a939e3b8 | Nikos Skalkotos | part_end = last.start + (new_size * 11) // 10 |
214 | a939e3b8 | Nikos Skalkotos | # Alighn to 2048
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215 | a939e3b8 | Nikos Skalkotos | part_end = ((part_end + 2047) // 2048) * 2048 |
216 | a939e3b8 | Nikos Skalkotos | |
217 | a939e3b8 | Nikos Skalkotos | image_disk.setPartitionGeometry( |
218 | a939e3b8 | Nikos Skalkotos | image_disk.getPartitionBySector(last.start), |
219 | a939e3b8 | Nikos Skalkotos | parted.Constraint(device=image_disk.device), |
220 | 83fe59dd | Nikos Skalkotos | start=last.start, end=part_end) |
221 | a939e3b8 | Nikos Skalkotos | image_disk.commit() |
222 | a939e3b8 | Nikos Skalkotos | |
223 | 25b4d858 | Nikos Skalkotos | # Parted may have changed this for better alignment
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224 | 25b4d858 | Nikos Skalkotos | part_end = image_disk.getPartitionBySector(last.start).geometry.end |
225 | 25b4d858 | Nikos Skalkotos | last = last._replace(end=part_end) |
226 | 25b4d858 | Nikos Skalkotos | partitions[-1] = last
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227 | 25b4d858 | Nikos Skalkotos | |
228 | 25b4d858 | Nikos Skalkotos | # Leave 2048 blocks at the end.
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229 | 83fe59dd | Nikos Skalkotos | new_end = part_end + 2048
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230 | 25b4d858 | Nikos Skalkotos | |
231 | a939e3b8 | Nikos Skalkotos | if last.type == parted.PARTITION_LOGICAL:
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232 | a939e3b8 | Nikos Skalkotos | # Fix the extended partition
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233 | a939e3b8 | Nikos Skalkotos | extended = disk.getExtendedPartition() |
234 | a939e3b8 | Nikos Skalkotos | |
235 | 6228d45e | Nikos Skalkotos | image_disk.setPartitionGeometry( |
236 | 6228d45e | Nikos Skalkotos | extended, parted.Constraint(device=img_dev), |
237 | a939e3b8 | Nikos Skalkotos | ext.geometry.start, end=last.end) |
238 | a939e3b8 | Nikos Skalkotos | image_disk.commit() |
239 | 8eea5572 | Nikos Skalkotos | |
240 | 83fe59dd | Nikos Skalkotos | image_dev.destroy() |
241 | 25b4d858 | Nikos Skalkotos | return new_end
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242 | 8eea5572 | Nikos Skalkotos | |
243 | 25b4d858 | Nikos Skalkotos | def _map_partition(self, dev, num, start, end): |
244 | 25b4d858 | Nikos Skalkotos | name = os.path.basename(dev) |
245 | 25b4d858 | Nikos Skalkotos | tablefd, table = tempfile.mkstemp() |
246 | 25b4d858 | Nikos Skalkotos | try:
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247 | 25b4d858 | Nikos Skalkotos | size = end - start + 1
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248 | 25b4d858 | Nikos Skalkotos | os.write(tablefd, "0 %d linear %s %d" % (size, dev, start))
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249 | 25b4d858 | Nikos Skalkotos | dmsetup('create', "%sp%d" % (name, num), table) |
250 | 25b4d858 | Nikos Skalkotos | finally:
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251 | 25b4d858 | Nikos Skalkotos | os.unlink(table) |
252 | 8eea5572 | Nikos Skalkotos | |
253 | 25b4d858 | Nikos Skalkotos | return "/dev/mapper/%sp%d" % (name, num) |
254 | 8eea5572 | Nikos Skalkotos | |
255 | 25b4d858 | Nikos Skalkotos | def _unmap_partition(self, dev): |
256 | 25b4d858 | Nikos Skalkotos | if not os.path.exists(dev): |
257 | 25b4d858 | Nikos Skalkotos | return
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258 | 8eea5572 | Nikos Skalkotos | |
259 | f3845095 | Nikos Skalkotos | try_fail_repeat(dmsetup, 'remove', dev.split('/dev/mapper/')[1]) |
260 | 8eea5572 | Nikos Skalkotos | |
261 | 25b4d858 | Nikos Skalkotos | def _mount(self, target, devs): |
262 | 25b4d858 | Nikos Skalkotos | |
263 | 25b4d858 | Nikos Skalkotos | devs.sort(key=lambda d: d[1]) |
264 | 25b4d858 | Nikos Skalkotos | for dev, mpoint in devs: |
265 | 25b4d858 | Nikos Skalkotos | absmpoint = os.path.abspath(target + mpoint) |
266 | 25b4d858 | Nikos Skalkotos | if not os.path.exists(absmpoint): |
267 | 25b4d858 | Nikos Skalkotos | os.makedirs(absmpoint) |
268 | 25b4d858 | Nikos Skalkotos | mount(dev, absmpoint) |
269 | 25b4d858 | Nikos Skalkotos | |
270 | 25b4d858 | Nikos Skalkotos | def _umount_all(self, target): |
271 | 25b4d858 | Nikos Skalkotos | mpoints = [] |
272 | 25b4d858 | Nikos Skalkotos | for entry in self._read_fstable('/proc/mounts'): |
273 | 25b4d858 | Nikos Skalkotos | if entry.mpoint.startswith(os.path.abspath(target)):
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274 | 25b4d858 | Nikos Skalkotos | mpoints.append(entry.mpoint) |
275 | 74149d07 | Nikos Skalkotos | |
276 | 25b4d858 | Nikos Skalkotos | mpoints.sort() |
277 | 25b4d858 | Nikos Skalkotos | for mpoint in reversed(mpoints): |
278 | f3845095 | Nikos Skalkotos | try_fail_repeat(umount, mpoint) |
279 | 25b4d858 | Nikos Skalkotos | |
280 | 74149d07 | Nikos Skalkotos | def _to_exclude(self): |
281 | bf15a033 | Nikos Skalkotos | excluded = ['/tmp', '/var/tmp'] |
282 | 74149d07 | Nikos Skalkotos | local_filesystems = MKFS_OPTS.keys() + ['rootfs']
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283 | 74149d07 | Nikos Skalkotos | for entry in self._read_fstable('/proc/mounts'): |
284 | 74149d07 | Nikos Skalkotos | if entry.fs in local_filesystems: |
285 | 74149d07 | Nikos Skalkotos | continue
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286 | 74149d07 | Nikos Skalkotos | |
287 | 74149d07 | Nikos Skalkotos | mpoint = entry.mpoint |
288 | 74149d07 | Nikos Skalkotos | if mpoint in excluded: |
289 | 74149d07 | Nikos Skalkotos | continue
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290 | 74149d07 | Nikos Skalkotos | |
291 | 6228d45e | Nikos Skalkotos | descendants = filter(
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292 | 6228d45e | Nikos Skalkotos | lambda p: p.startswith(mpoint + '/'), excluded) |
293 | 74149d07 | Nikos Skalkotos | if len(descendants): |
294 | 74149d07 | Nikos Skalkotos | for d in descendants: |
295 | 74149d07 | Nikos Skalkotos | excluded.remove(d) |
296 | 74149d07 | Nikos Skalkotos | excluded.append(mpoint) |
297 | 74149d07 | Nikos Skalkotos | continue
|
298 | 74149d07 | Nikos Skalkotos | |
299 | 74149d07 | Nikos Skalkotos | dirname = mpoint |
300 | 74149d07 | Nikos Skalkotos | basename = ''
|
301 | 74149d07 | Nikos Skalkotos | found_ancestor = False
|
302 | 74149d07 | Nikos Skalkotos | while dirname != '/': |
303 | 74149d07 | Nikos Skalkotos | (dirname, basename) = os.path.split(dirname) |
304 | 74149d07 | Nikos Skalkotos | if dirname in excluded: |
305 | 74149d07 | Nikos Skalkotos | found_ancestor = True
|
306 | 74149d07 | Nikos Skalkotos | break
|
307 | 74149d07 | Nikos Skalkotos | |
308 | 74149d07 | Nikos Skalkotos | if not found_ancestor: |
309 | 74149d07 | Nikos Skalkotos | excluded.append(mpoint) |
310 | 74149d07 | Nikos Skalkotos | |
311 | 74149d07 | Nikos Skalkotos | return map(lambda d: d + "/*", excluded) |
312 | 74149d07 | Nikos Skalkotos | |
313 | bf15a033 | Nikos Skalkotos | def _replace_uuids(self, target, new_uuid): |
314 | bf15a033 | Nikos Skalkotos | |
315 | bf15a033 | Nikos Skalkotos | files = ['/etc/fstab',
|
316 | bf15a033 | Nikos Skalkotos | '/boot/grub/grub.cfg',
|
317 | bf15a033 | Nikos Skalkotos | '/boot/grub/menu.lst',
|
318 | bf15a033 | Nikos Skalkotos | '/boot/grub/grub.conf']
|
319 | bf15a033 | Nikos Skalkotos | |
320 | 6228d45e | Nikos Skalkotos | orig = dict(map( |
321 | 6228d45e | Nikos Skalkotos | lambda p: (
|
322 | 6228d45e | Nikos Skalkotos | p.number, |
323 | 6228d45e | Nikos Skalkotos | blkid('-s', 'UUID', '-o', 'value', p.path).stdout.strip()), |
324 | 6228d45e | Nikos Skalkotos | self.disk.partitions))
|
325 | bf15a033 | Nikos Skalkotos | |
326 | bf15a033 | Nikos Skalkotos | for f in map(lambda f: target + f, files): |
327 | bf15a033 | Nikos Skalkotos | |
328 | bf15a033 | Nikos Skalkotos | if not os.path.exists(f): |
329 | bf15a033 | Nikos Skalkotos | continue
|
330 | bf15a033 | Nikos Skalkotos | |
331 | bf15a033 | Nikos Skalkotos | with open(f, 'r') as src: |
332 | bf15a033 | Nikos Skalkotos | lines = src.readlines() |
333 | bf15a033 | Nikos Skalkotos | with open(f, 'w') as dest: |
334 | bf15a033 | Nikos Skalkotos | for line in lines: |
335 | bf15a033 | Nikos Skalkotos | for i, uuid in new_uuid.items(): |
336 | bf15a033 | Nikos Skalkotos | line = re.sub(orig[i], uuid, line) |
337 | bf15a033 | Nikos Skalkotos | dest.write(line) |
338 | bf15a033 | Nikos Skalkotos | |
339 | 25b4d858 | Nikos Skalkotos | def _create_filesystems(self, image): |
340 | 74149d07 | Nikos Skalkotos | |
341 | bf15a033 | Nikos Skalkotos | filesystem = {} |
342 | 25b4d858 | Nikos Skalkotos | for p in self.disk.partitions: |
343 | bf15a033 | Nikos Skalkotos | filesystem[p.number] = self._get_mount_options(p.path)
|
344 | 25b4d858 | Nikos Skalkotos | |
345 | bf15a033 | Nikos Skalkotos | partitions = self._get_partitions(parted.Disk(parted.Device(image)))
|
346 | bf15a033 | Nikos Skalkotos | unmounted = filter(lambda p: filesystem[p.num] is None, partitions) |
347 | bf15a033 | Nikos Skalkotos | mounted = filter(lambda p: filesystem[p.num] is not None, partitions) |
348 | 25b4d858 | Nikos Skalkotos | |
349 | 25b4d858 | Nikos Skalkotos | # For partitions that are not mounted right now, we can simply dd them
|
350 | 25b4d858 | Nikos Skalkotos | # into the image.
|
351 | 25b4d858 | Nikos Skalkotos | for p in unmounted: |
352 | 25b4d858 | Nikos Skalkotos | dd('if=%s' % self.disk.device.path, 'of=%s' % image, |
353 | 25b4d858 | Nikos Skalkotos | 'count=%d' % (p.end - p.start + 1), 'conv=notrunc', |
354 | 25b4d858 | Nikos Skalkotos | 'seek=%d' % p.start, 'skip=%d' % p.start) |
355 | 25b4d858 | Nikos Skalkotos | |
356 | 25b4d858 | Nikos Skalkotos | loop = str(losetup('-f', '--show', image)).strip() |
357 | 25b4d858 | Nikos Skalkotos | mapped = {} |
358 | 25b4d858 | Nikos Skalkotos | try:
|
359 | 25b4d858 | Nikos Skalkotos | for p in mounted: |
360 | 74149d07 | Nikos Skalkotos | i = p.num |
361 | 25b4d858 | Nikos Skalkotos | mapped[i] = self._map_partition(loop, i, p.start, p.end)
|
362 | 25b4d858 | Nikos Skalkotos | |
363 | bf15a033 | Nikos Skalkotos | new_uuid = {} |
364 | 25b4d858 | Nikos Skalkotos | # Create the file systems
|
365 | 25b4d858 | Nikos Skalkotos | for i, dev in mapped.iteritems(): |
366 | bf15a033 | Nikos Skalkotos | fs = filesystem[i].fs |
367 | 25b4d858 | Nikos Skalkotos | self.out.output('Creating %s filesystem on partition %d ... ' % |
368 | 6228d45e | Nikos Skalkotos | (fs, i), False)
|
369 | 25b4d858 | Nikos Skalkotos | get_command('mkfs.%s' % fs)(*(MKFS_OPTS[fs] + [dev]))
|
370 | 25b4d858 | Nikos Skalkotos | self.out.success('done') |
371 | 6228d45e | Nikos Skalkotos | new_uuid[i] = blkid( |
372 | 6228d45e | Nikos Skalkotos | '-s', 'UUID', '-o', 'value', dev).stdout.strip() |
373 | 25b4d858 | Nikos Skalkotos | |
374 | 25b4d858 | Nikos Skalkotos | target = tempfile.mkdtemp() |
375 | 25b4d858 | Nikos Skalkotos | try:
|
376 | 25b4d858 | Nikos Skalkotos | absmpoints = self._mount(target,
|
377 | 6228d45e | Nikos Skalkotos | [(mapped[i], filesystem[i].mpoint) |
378 | 6228d45e | Nikos Skalkotos | for i in mapped.keys()]) |
379 | 74149d07 | Nikos Skalkotos | exclude = self._to_exclude() + [image]
|
380 | 1fa75c4c | Nikos Skalkotos | |
381 | 1fa75c4c | Nikos Skalkotos | rsync = Rsync(self.out)
|
382 | 1fa75c4c | Nikos Skalkotos | |
383 | 1fa75c4c | Nikos Skalkotos | # Excluded paths need to be relative to the source
|
384 | 1fa75c4c | Nikos Skalkotos | for excl in map(lambda p: os.path.relpath(p, '/'), exclude): |
385 | 1fa75c4c | Nikos Skalkotos | rsync.exclude(excl) |
386 | 1fa75c4c | Nikos Skalkotos | |
387 | 1fa75c4c | Nikos Skalkotos | rsync.archive().hard_links().xattrs().sparse().acls() |
388 | 1fa75c4c | Nikos Skalkotos | rsync.run('/', target)
|
389 | 25b4d858 | Nikos Skalkotos | |
390 | 6228d45e | Nikos Skalkotos | # We need to replace the old UUID referencies with the new
|
391 | 6228d45e | Nikos Skalkotos | # ones in grub configuration files and /etc/fstab for file
|
392 | 6228d45e | Nikos Skalkotos | # systems that have been recreated.
|
393 | bf15a033 | Nikos Skalkotos | self._replace_uuids(target, new_uuid)
|
394 | bf15a033 | Nikos Skalkotos | |
395 | 25b4d858 | Nikos Skalkotos | finally:
|
396 | 25b4d858 | Nikos Skalkotos | self._umount_all(target)
|
397 | 25b4d858 | Nikos Skalkotos | os.rmdir(target) |
398 | 25b4d858 | Nikos Skalkotos | finally:
|
399 | 25b4d858 | Nikos Skalkotos | for dev in mapped.values(): |
400 | 25b4d858 | Nikos Skalkotos | self._unmap_partition(dev)
|
401 | 25b4d858 | Nikos Skalkotos | losetup('-d', loop)
|
402 | 25b4d858 | Nikos Skalkotos | |
403 | 567891a6 | Nikos Skalkotos | def create_image(self, image): |
404 | f3845095 | Nikos Skalkotos | """Given an image filename, this method will create an image out of the
|
405 | f3845095 | Nikos Skalkotos | running system.
|
406 | f3845095 | Nikos Skalkotos | """
|
407 | a939e3b8 | Nikos Skalkotos | |
408 | 567891a6 | Nikos Skalkotos | size = self.disk.device.getLength() * self.disk.device.sectorSize |
409 | a939e3b8 | Nikos Skalkotos | |
410 | a939e3b8 | Nikos Skalkotos | # Create sparse file to host the image
|
411 | 567891a6 | Nikos Skalkotos | fd = os.open(image, os.O_WRONLY | os.O_CREAT) |
412 | 567891a6 | Nikos Skalkotos | try:
|
413 | 567891a6 | Nikos Skalkotos | os.ftruncate(fd, size) |
414 | 567891a6 | Nikos Skalkotos | finally:
|
415 | 567891a6 | Nikos Skalkotos | os.close(fd) |
416 | 25b4d858 | Nikos Skalkotos | |
417 | 25b4d858 | Nikos Skalkotos | self._create_partition_table(image)
|
418 | bf15a033 | Nikos Skalkotos | |
419 | 25b4d858 | Nikos Skalkotos | end_sector = self._shrink_partitions(image)
|
420 | a939e3b8 | Nikos Skalkotos | |
421 | 25b4d858 | Nikos Skalkotos | # Check if the available space is enough to host the image
|
422 | 25b4d858 | Nikos Skalkotos | dirname = os.path.dirname(image) |
423 | 25b4d858 | Nikos Skalkotos | size = (end_sector + 1) * self.disk.device.sectorSize |
424 | 25b4d858 | Nikos Skalkotos | self.out.output("Examining available space in %s ..." % dirname, False) |
425 | 25b4d858 | Nikos Skalkotos | stat = os.statvfs(dirname) |
426 | 25b4d858 | Nikos Skalkotos | available = stat.f_bavail * stat.f_frsize |
427 | 25b4d858 | Nikos Skalkotos | if available <= size:
|
428 | 25b4d858 | Nikos Skalkotos | raise FatalError('Not enough space in %s to host the image' % |
429 | 25b4d858 | Nikos Skalkotos | dirname) |
430 | 25b4d858 | Nikos Skalkotos | self.out.success("sufficient") |
431 | 8eea5572 | Nikos Skalkotos | |
432 | 25b4d858 | Nikos Skalkotos | self._create_filesystems(image)
|
433 | 8eea5572 | Nikos Skalkotos | |
434 | 83fe59dd | Nikos Skalkotos | # Truncate image to the new size. I counldn't find a better way to do
|
435 | 83fe59dd | Nikos Skalkotos | # this. It seems that python's high level functions work in a different
|
436 | 83fe59dd | Nikos Skalkotos | # way.
|
437 | 83fe59dd | Nikos Skalkotos | fd = os.open(image, os.O_RDWR) |
438 | 83fe59dd | Nikos Skalkotos | try:
|
439 | 83fe59dd | Nikos Skalkotos | os.ftruncate(fd, size) |
440 | 83fe59dd | Nikos Skalkotos | finally:
|
441 | 83fe59dd | Nikos Skalkotos | os.close(fd) |
442 | 83fe59dd | Nikos Skalkotos | |
443 | 25b4d858 | Nikos Skalkotos | return image
|
444 | 9e4b4de2 | Nikos Skalkotos | |
445 | 9e4b4de2 | Nikos Skalkotos | # vim: set sta sts=4 shiftwidth=4 sw=4 et ai : |