root / image_creator / bundle_volume.py @ d15368cc
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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 | 25b4d858 | Nikos Skalkotos | MKFS_OPTS = { |
55 | 25b4d858 | Nikos Skalkotos | 'ext2': ['-F'], |
56 | 25b4d858 | Nikos Skalkotos | 'ext3': ['-F'], |
57 | 25b4d858 | Nikos Skalkotos | 'ext4': ['-F'], |
58 | 25b4d858 | Nikos Skalkotos | 'reiserfs': ['-ff'], |
59 | 25b4d858 | Nikos Skalkotos | 'btrfs': [],
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60 | 25b4d858 | Nikos Skalkotos | 'minix': [],
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61 | 25b4d858 | Nikos Skalkotos | 'xfs': ['-f'], |
62 | 25b4d858 | Nikos Skalkotos | 'jfs': ['-f'], |
63 | 25b4d858 | Nikos Skalkotos | 'ntfs': ['-F'], |
64 | 25b4d858 | Nikos Skalkotos | 'msdos': [],
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65 | 25b4d858 | Nikos Skalkotos | 'vfat': []
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66 | 25b4d858 | Nikos Skalkotos | } |
67 | 9517bf29 | Nikos Skalkotos | |
68 | 9517bf29 | Nikos Skalkotos | |
69 | f3845095 | Nikos Skalkotos | class BundleVolume(object): |
70 | f3845095 | Nikos Skalkotos | """This class can be used to create an image out of the running system"""
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71 | 27a4229d | Nikos Skalkotos | |
72 | 8eea5572 | Nikos Skalkotos | def __init__(self, out, meta): |
73 | f3845095 | Nikos Skalkotos | """Create an instance of the BundleVolume class."""
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74 | 8eea5572 | Nikos Skalkotos | self.out = out
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75 | 8eea5572 | Nikos Skalkotos | self.meta = meta
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76 | 27a4229d | Nikos Skalkotos | |
77 | a939e3b8 | Nikos Skalkotos | self.out.output('Searching for root device ...', False) |
78 | 8eea5572 | Nikos Skalkotos | root = self._get_root_partition()
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79 | 27a4229d | Nikos Skalkotos | |
80 | 8eea5572 | Nikos Skalkotos | if root.startswith("UUID=") or root.startswith("LABEL="): |
81 | 25b4d858 | Nikos Skalkotos | root = findfs(root).stdout.strip() |
82 | 27a4229d | Nikos Skalkotos | |
83 | 25b4d858 | Nikos Skalkotos | if not re.match('/dev/[hsv]d[a-z][1-9]*$', root): |
84 | 25b4d858 | Nikos Skalkotos | raise FatalError("Don't know how to handle root device: %s" % root) |
85 | 9517bf29 | Nikos Skalkotos | |
86 | 25b4d858 | Nikos Skalkotos | out.success(root) |
87 | 9517bf29 | Nikos Skalkotos | |
88 | 25b4d858 | Nikos Skalkotos | disk_file = re.split('[0-9]', root)[0] |
89 | 25b4d858 | Nikos Skalkotos | device = parted.Device(disk_file) |
90 | 25b4d858 | Nikos Skalkotos | self.disk = parted.Disk(device)
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91 | 9517bf29 | Nikos Skalkotos | |
92 | a939e3b8 | Nikos Skalkotos | def _read_fstable(self, f): |
93 | 25b4d858 | Nikos Skalkotos | |
94 | 8eea5572 | Nikos Skalkotos | if not os.path.isfile(f): |
95 | 8eea5572 | Nikos Skalkotos | raise FatalError("Unable to open: `%s'. File is missing." % f) |
96 | 27a4229d | Nikos Skalkotos | |
97 | 74149d07 | Nikos Skalkotos | FileSystemTableEntry = namedtuple('FileSystemTableEntry',
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98 | 25b4d858 | Nikos Skalkotos | 'dev mpoint fs opts freq passno')
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99 | 8eea5572 | Nikos Skalkotos | with open(f) as table: |
100 | 8eea5572 | Nikos Skalkotos | for line in iter(table): |
101 | 8eea5572 | Nikos Skalkotos | entry = line.split('#')[0].strip().split() |
102 | 8eea5572 | Nikos Skalkotos | if len(entry) != 6: |
103 | 8eea5572 | Nikos Skalkotos | continue
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104 | 74149d07 | Nikos Skalkotos | yield FileSystemTableEntry(*entry)
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105 | 27a4229d | Nikos Skalkotos | |
106 | a939e3b8 | Nikos Skalkotos | def _get_root_partition(self): |
107 | 8eea5572 | Nikos Skalkotos | for entry in self._read_fstable('/etc/fstab'): |
108 | 8eea5572 | Nikos Skalkotos | if entry.mpoint == '/': |
109 | 8eea5572 | Nikos Skalkotos | return entry.dev
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110 | 27a4229d | Nikos Skalkotos | |
111 | 8eea5572 | Nikos Skalkotos | raise FatalError("Unable to find root device in /etc/fstab") |
112 | 27a4229d | Nikos Skalkotos | |
113 | a939e3b8 | Nikos Skalkotos | def _is_mpoint(self, path): |
114 | a939e3b8 | Nikos Skalkotos | for entry in self._read_fstable('/proc/mounts'): |
115 | 8eea5572 | Nikos Skalkotos | if entry.mpoint == path:
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116 | 8eea5572 | Nikos Skalkotos | return True |
117 | 8eea5572 | Nikos Skalkotos | return False |
118 | 27a4229d | Nikos Skalkotos | |
119 | 25b4d858 | Nikos Skalkotos | def _get_mount_options(self, device): |
120 | a939e3b8 | Nikos Skalkotos | for entry in self._read_fstable('/proc/mounts'): |
121 | 8eea5572 | Nikos Skalkotos | if not entry.dev.startswith('/'): |
122 | 8eea5572 | Nikos Skalkotos | continue
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123 | 9517bf29 | Nikos Skalkotos | |
124 | 8eea5572 | Nikos Skalkotos | if os.path.realpath(entry.dev) == os.path.realpath(device):
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125 | 8eea5572 | Nikos Skalkotos | return entry
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126 | 9517bf29 | Nikos Skalkotos | |
127 | 25b4d858 | Nikos Skalkotos | return None |
128 | 9517bf29 | Nikos Skalkotos | |
129 | 25b4d858 | Nikos Skalkotos | def _create_partition_table(self, image): |
130 | 8eea5572 | Nikos Skalkotos | |
131 | 25b4d858 | Nikos Skalkotos | if self.disk.type != 'msdos': |
132 | 8eea5572 | Nikos Skalkotos | raise FatalError('Only msdos partition tables are supported') |
133 | 8eea5572 | Nikos Skalkotos | |
134 | 8eea5572 | Nikos Skalkotos | # Copy the MBR and the space between the MBR and the first partition.
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135 | 8eea5572 | Nikos Skalkotos | # In Grub version 1 Stage 1.5 is located there.
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136 | 25b4d858 | Nikos Skalkotos | first_sector = self.disk.getPrimaryPartitions()[0].geometry.start |
137 | 8eea5572 | Nikos Skalkotos | |
138 | 25b4d858 | Nikos Skalkotos | dd('if=%s' % self.disk.device.path, 'of=%s' % image, |
139 | 25b4d858 | Nikos Skalkotos | 'bs=%d' % self.disk.device.sectorSize, |
140 | 8eea5572 | Nikos Skalkotos | 'count=%d' % first_sector, 'conv=notrunc') |
141 | 8eea5572 | Nikos Skalkotos | |
142 | 8eea5572 | Nikos Skalkotos | # Create the Extended boot records (EBRs) in the image
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143 | 25b4d858 | Nikos Skalkotos | extended = self.disk.getExtendedPartition()
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144 | 8eea5572 | Nikos Skalkotos | if not extended: |
145 | 8eea5572 | Nikos Skalkotos | return
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146 | 8eea5572 | Nikos Skalkotos | |
147 | 8eea5572 | Nikos Skalkotos | # Extended boot records precede the logical partitions they describe
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148 | 25b4d858 | Nikos Skalkotos | logical = self.disk.getLogicalPartitions()
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149 | 8eea5572 | Nikos Skalkotos | start = extended.geometry.start |
150 | 8eea5572 | Nikos Skalkotos | for i in range(len(logical)): |
151 | 8eea5572 | Nikos Skalkotos | end = logical[i].geometry.start - 1
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152 | 25b4d858 | Nikos Skalkotos | dd('if=%s' % self.disk.device.path, 'of=%s' % image, |
153 | 8eea5572 | Nikos Skalkotos | 'count=%d' % (end - start + 1), 'conv=notrunc', |
154 | 8eea5572 | Nikos Skalkotos | 'seek=%d' % start, 'skip=%d' % start) |
155 | 8eea5572 | Nikos Skalkotos | start = logical[i].geometry.end + 1
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156 | 8eea5572 | Nikos Skalkotos | |
157 | 25b4d858 | Nikos Skalkotos | def _get_partitions(self, disk): |
158 | 25b4d858 | Nikos Skalkotos | Partition = namedtuple('Partition', 'num start end type fs') |
159 | 8eea5572 | Nikos Skalkotos | |
160 | 8eea5572 | Nikos Skalkotos | partitions = [] |
161 | 25b4d858 | Nikos Skalkotos | for p in disk.partitions: |
162 | 25b4d858 | Nikos Skalkotos | num = p.number |
163 | 25b4d858 | Nikos Skalkotos | start = p.geometry.start |
164 | 25b4d858 | Nikos Skalkotos | end = p.geometry.end |
165 | 25b4d858 | Nikos Skalkotos | ptype = p.type |
166 | 25b4d858 | Nikos Skalkotos | fs = p.fileSystem.type if p.fileSystem is not None else '' |
167 | 25b4d858 | Nikos Skalkotos | partitions.append(Partition(num, start, end, ptype, fs)) |
168 | 25b4d858 | Nikos Skalkotos | |
169 | 25b4d858 | Nikos Skalkotos | return partitions
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170 | 25b4d858 | Nikos Skalkotos | |
171 | 25b4d858 | Nikos Skalkotos | def _shrink_partitions(self, image): |
172 | 8eea5572 | Nikos Skalkotos | |
173 | 25b4d858 | Nikos Skalkotos | new_end = self.disk.device.getLength()
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174 | 25b4d858 | Nikos Skalkotos | |
175 | 25b4d858 | Nikos Skalkotos | image_dev = parted.Device(image) |
176 | a939e3b8 | Nikos Skalkotos | image_disk = parted.Disk(image_dev) |
177 | a939e3b8 | Nikos Skalkotos | |
178 | a939e3b8 | Nikos Skalkotos | is_extended = lambda p: p.type == parted.PARTITION_EXTENDED
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179 | a939e3b8 | Nikos Skalkotos | is_logical = lambda p: p.type == parted.PARTITION_LOGICAL
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180 | a939e3b8 | Nikos Skalkotos | |
181 | 25b4d858 | Nikos Skalkotos | partitions = self._get_partitions(self.disk) |
182 | a939e3b8 | Nikos Skalkotos | |
183 | a939e3b8 | Nikos Skalkotos | last = partitions[-1]
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184 | a939e3b8 | Nikos Skalkotos | if last.fs == 'linux-swap(v1)': |
185 | a939e3b8 | Nikos Skalkotos | MB = 2 ** 20 |
186 | 25b4d858 | Nikos Skalkotos | size = (last.end - last.start + 1) * self.disk.device.sectorSize |
187 | a939e3b8 | Nikos Skalkotos | self.meta['SWAP'] = "%d:%s" % (last.num, (size + MB - 1) // MB) |
188 | a939e3b8 | Nikos Skalkotos | |
189 | a939e3b8 | Nikos Skalkotos | image_disk.deletePartition( |
190 | a939e3b8 | Nikos Skalkotos | image_disk.getPartitionBySector(last.start)) |
191 | a939e3b8 | Nikos Skalkotos | image_disk.commit() |
192 | a939e3b8 | Nikos Skalkotos | |
193 | a939e3b8 | Nikos Skalkotos | if is_logical(last) and last.num == 5: |
194 | a939e3b8 | Nikos Skalkotos | extended = image_disk.getExtendedPartition() |
195 | a939e3b8 | Nikos Skalkotos | image_disk.deletePartition(extended) |
196 | a939e3b8 | Nikos Skalkotos | image_disk.commit() |
197 | a939e3b8 | Nikos Skalkotos | partitions.remove(filter(is_extended, partitions)[0]) |
198 | a939e3b8 | Nikos Skalkotos | |
199 | a939e3b8 | Nikos Skalkotos | partitions.remove(last) |
200 | a939e3b8 | Nikos Skalkotos | last = partitions[-1]
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201 | a939e3b8 | Nikos Skalkotos | |
202 | a939e3b8 | Nikos Skalkotos | # Leave 2048 blocks at the end
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203 | a939e3b8 | Nikos Skalkotos | new_end = last.end + 2048
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204 | a939e3b8 | Nikos Skalkotos | |
205 | 25b4d858 | Nikos Skalkotos | mount_options = self._get_mount_options(
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206 | 25b4d858 | Nikos Skalkotos | self.disk.getPartitionBySector(last.start).path)
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207 | 74149d07 | Nikos Skalkotos | if mount_options is not None: |
208 | 25b4d858 | Nikos Skalkotos | stat = os.statvfs(mount_options.mpoint) |
209 | 25b4d858 | Nikos Skalkotos | # Shrink the last partition. The new size should be the size of the
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210 | 25b4d858 | Nikos Skalkotos | # occupied blocks
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211 | a939e3b8 | Nikos Skalkotos | blcks = stat.f_blocks - stat.f_bavail |
212 | 25b4d858 | Nikos Skalkotos | new_size = (blcks * stat.f_frsize) // self.disk.device.sectorSize
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213 | a939e3b8 | Nikos Skalkotos | |
214 | a939e3b8 | Nikos Skalkotos | # Add 10% just to be on the safe side
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215 | a939e3b8 | Nikos Skalkotos | part_end = last.start + (new_size * 11) // 10 |
216 | a939e3b8 | Nikos Skalkotos | # Alighn to 2048
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217 | a939e3b8 | Nikos Skalkotos | part_end = ((part_end + 2047) // 2048) * 2048 |
218 | a939e3b8 | Nikos Skalkotos | |
219 | a939e3b8 | Nikos Skalkotos | image_disk.setPartitionGeometry( |
220 | a939e3b8 | Nikos Skalkotos | image_disk.getPartitionBySector(last.start), |
221 | a939e3b8 | Nikos Skalkotos | parted.Constraint(device=image_disk.device), |
222 | 83fe59dd | Nikos Skalkotos | start=last.start, end=part_end) |
223 | a939e3b8 | Nikos Skalkotos | image_disk.commit() |
224 | a939e3b8 | Nikos Skalkotos | |
225 | 25b4d858 | Nikos Skalkotos | # Parted may have changed this for better alignment
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226 | 25b4d858 | Nikos Skalkotos | part_end = image_disk.getPartitionBySector(last.start).geometry.end |
227 | 25b4d858 | Nikos Skalkotos | last = last._replace(end=part_end) |
228 | 25b4d858 | Nikos Skalkotos | partitions[-1] = last
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229 | 25b4d858 | Nikos Skalkotos | |
230 | 25b4d858 | Nikos Skalkotos | # Leave 2048 blocks at the end.
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231 | 83fe59dd | Nikos Skalkotos | new_end = part_end + 2048
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232 | 25b4d858 | Nikos Skalkotos | |
233 | a939e3b8 | Nikos Skalkotos | if last.type == parted.PARTITION_LOGICAL:
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234 | a939e3b8 | Nikos Skalkotos | # Fix the extended partition
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235 | a939e3b8 | Nikos Skalkotos | extended = disk.getExtendedPartition() |
236 | a939e3b8 | Nikos Skalkotos | |
237 | a939e3b8 | Nikos Skalkotos | image_disk.setPartitionGeometry(extended, |
238 | a939e3b8 | Nikos Skalkotos | parted.Constraint(device=img_dev), |
239 | a939e3b8 | Nikos Skalkotos | ext.geometry.start, end=last.end) |
240 | a939e3b8 | Nikos Skalkotos | image_disk.commit() |
241 | 8eea5572 | Nikos Skalkotos | |
242 | 83fe59dd | Nikos Skalkotos | image_dev.destroy() |
243 | 25b4d858 | Nikos Skalkotos | return new_end
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244 | 8eea5572 | Nikos Skalkotos | |
245 | 25b4d858 | Nikos Skalkotos | def _map_partition(self, dev, num, start, end): |
246 | 25b4d858 | Nikos Skalkotos | name = os.path.basename(dev) |
247 | 25b4d858 | Nikos Skalkotos | tablefd, table = tempfile.mkstemp() |
248 | 25b4d858 | Nikos Skalkotos | try:
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249 | 25b4d858 | Nikos Skalkotos | size = end - start + 1
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250 | 25b4d858 | Nikos Skalkotos | os.write(tablefd, "0 %d linear %s %d" % (size, dev, start))
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251 | 25b4d858 | Nikos Skalkotos | dmsetup('create', "%sp%d" % (name, num), table) |
252 | 25b4d858 | Nikos Skalkotos | finally:
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253 | 25b4d858 | Nikos Skalkotos | os.unlink(table) |
254 | 8eea5572 | Nikos Skalkotos | |
255 | 25b4d858 | Nikos Skalkotos | return "/dev/mapper/%sp%d" % (name, num) |
256 | 8eea5572 | Nikos Skalkotos | |
257 | 25b4d858 | Nikos Skalkotos | def _unmap_partition(self, dev): |
258 | 25b4d858 | Nikos Skalkotos | if not os.path.exists(dev): |
259 | 25b4d858 | Nikos Skalkotos | return
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260 | 8eea5572 | Nikos Skalkotos | |
261 | f3845095 | Nikos Skalkotos | try_fail_repeat(dmsetup, 'remove', dev.split('/dev/mapper/')[1]) |
262 | 8eea5572 | Nikos Skalkotos | |
263 | 25b4d858 | Nikos Skalkotos | def _mount(self, target, devs): |
264 | 25b4d858 | Nikos Skalkotos | |
265 | 25b4d858 | Nikos Skalkotos | devs.sort(key=lambda d: d[1]) |
266 | 25b4d858 | Nikos Skalkotos | for dev, mpoint in devs: |
267 | 25b4d858 | Nikos Skalkotos | absmpoint = os.path.abspath(target + mpoint) |
268 | 25b4d858 | Nikos Skalkotos | if not os.path.exists(absmpoint): |
269 | 25b4d858 | Nikos Skalkotos | os.makedirs(absmpoint) |
270 | 25b4d858 | Nikos Skalkotos | mount(dev, absmpoint) |
271 | 25b4d858 | Nikos Skalkotos | |
272 | 25b4d858 | Nikos Skalkotos | def _umount_all(self, target): |
273 | 25b4d858 | Nikos Skalkotos | mpoints = [] |
274 | 25b4d858 | Nikos Skalkotos | for entry in self._read_fstable('/proc/mounts'): |
275 | 25b4d858 | Nikos Skalkotos | if entry.mpoint.startswith(os.path.abspath(target)):
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276 | 25b4d858 | Nikos Skalkotos | mpoints.append(entry.mpoint) |
277 | 74149d07 | Nikos Skalkotos | |
278 | 25b4d858 | Nikos Skalkotos | mpoints.sort() |
279 | 25b4d858 | Nikos Skalkotos | for mpoint in reversed(mpoints): |
280 | f3845095 | Nikos Skalkotos | try_fail_repeat(umount, mpoint) |
281 | 25b4d858 | Nikos Skalkotos | |
282 | 74149d07 | Nikos Skalkotos | def _to_exclude(self): |
283 | bf15a033 | Nikos Skalkotos | excluded = ['/tmp', '/var/tmp'] |
284 | 74149d07 | Nikos Skalkotos | local_filesystems = MKFS_OPTS.keys() + ['rootfs']
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285 | 74149d07 | Nikos Skalkotos | for entry in self._read_fstable('/proc/mounts'): |
286 | 74149d07 | Nikos Skalkotos | if entry.fs in local_filesystems: |
287 | 74149d07 | Nikos Skalkotos | continue
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288 | 74149d07 | Nikos Skalkotos | |
289 | 74149d07 | Nikos Skalkotos | mpoint = entry.mpoint |
290 | 74149d07 | Nikos Skalkotos | if mpoint in excluded: |
291 | 74149d07 | Nikos Skalkotos | continue
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292 | 74149d07 | Nikos Skalkotos | |
293 | 74149d07 | Nikos Skalkotos | descendants = filter(lambda p: p.startswith(mpoint + '/'), |
294 | 74149d07 | Nikos Skalkotos | excluded) |
295 | 74149d07 | Nikos Skalkotos | if len(descendants): |
296 | 74149d07 | Nikos Skalkotos | for d in descendants: |
297 | 74149d07 | Nikos Skalkotos | excluded.remove(d) |
298 | 74149d07 | Nikos Skalkotos | excluded.append(mpoint) |
299 | 74149d07 | Nikos Skalkotos | continue
|
300 | 74149d07 | Nikos Skalkotos | |
301 | 74149d07 | Nikos Skalkotos | dirname = mpoint |
302 | 74149d07 | Nikos Skalkotos | basename = ''
|
303 | 74149d07 | Nikos Skalkotos | found_ancestor = False
|
304 | 74149d07 | Nikos Skalkotos | while dirname != '/': |
305 | 74149d07 | Nikos Skalkotos | (dirname, basename) = os.path.split(dirname) |
306 | 74149d07 | Nikos Skalkotos | if dirname in excluded: |
307 | 74149d07 | Nikos Skalkotos | found_ancestor = True
|
308 | 74149d07 | Nikos Skalkotos | break
|
309 | 74149d07 | Nikos Skalkotos | |
310 | 74149d07 | Nikos Skalkotos | if not found_ancestor: |
311 | 74149d07 | Nikos Skalkotos | excluded.append(mpoint) |
312 | 74149d07 | Nikos Skalkotos | |
313 | 74149d07 | Nikos Skalkotos | return map(lambda d: d + "/*", excluded) |
314 | 74149d07 | Nikos Skalkotos | |
315 | bf15a033 | Nikos Skalkotos | def _replace_uuids(self, target, new_uuid): |
316 | bf15a033 | Nikos Skalkotos | |
317 | bf15a033 | Nikos Skalkotos | files = ['/etc/fstab',
|
318 | bf15a033 | Nikos Skalkotos | '/boot/grub/grub.cfg',
|
319 | bf15a033 | Nikos Skalkotos | '/boot/grub/menu.lst',
|
320 | bf15a033 | Nikos Skalkotos | '/boot/grub/grub.conf']
|
321 | bf15a033 | Nikos Skalkotos | |
322 | 567891a6 | Nikos Skalkotos | orig = dict(map(lambda p: (p.number, blkid('-s', 'UUID', '-o', |
323 | bf15a033 | Nikos Skalkotos | 'value', p.path).stdout.strip()), self.disk.partitions)) |
324 | bf15a033 | Nikos Skalkotos | |
325 | bf15a033 | Nikos Skalkotos | for f in map(lambda f: target + f, files): |
326 | bf15a033 | Nikos Skalkotos | |
327 | bf15a033 | Nikos Skalkotos | if not os.path.exists(f): |
328 | bf15a033 | Nikos Skalkotos | continue
|
329 | bf15a033 | Nikos Skalkotos | |
330 | bf15a033 | Nikos Skalkotos | with open(f, 'r') as src: |
331 | bf15a033 | Nikos Skalkotos | lines = src.readlines() |
332 | bf15a033 | Nikos Skalkotos | with open(f, 'w') as dest: |
333 | bf15a033 | Nikos Skalkotos | for line in lines: |
334 | bf15a033 | Nikos Skalkotos | for i, uuid in new_uuid.items(): |
335 | bf15a033 | Nikos Skalkotos | line = re.sub(orig[i], uuid, line) |
336 | bf15a033 | Nikos Skalkotos | dest.write(line) |
337 | bf15a033 | Nikos Skalkotos | |
338 | 25b4d858 | Nikos Skalkotos | def _create_filesystems(self, image): |
339 | 74149d07 | Nikos Skalkotos | |
340 | bf15a033 | Nikos Skalkotos | filesystem = {} |
341 | 25b4d858 | Nikos Skalkotos | for p in self.disk.partitions: |
342 | bf15a033 | Nikos Skalkotos | filesystem[p.number] = self._get_mount_options(p.path)
|
343 | 25b4d858 | Nikos Skalkotos | |
344 | bf15a033 | Nikos Skalkotos | partitions = self._get_partitions(parted.Disk(parted.Device(image)))
|
345 | bf15a033 | Nikos Skalkotos | unmounted = filter(lambda p: filesystem[p.num] is None, partitions) |
346 | bf15a033 | Nikos Skalkotos | mounted = filter(lambda p: filesystem[p.num] is not None, partitions) |
347 | 25b4d858 | Nikos Skalkotos | |
348 | 25b4d858 | Nikos Skalkotos | # For partitions that are not mounted right now, we can simply dd them
|
349 | 25b4d858 | Nikos Skalkotos | # into the image.
|
350 | 25b4d858 | Nikos Skalkotos | for p in unmounted: |
351 | 25b4d858 | Nikos Skalkotos | dd('if=%s' % self.disk.device.path, 'of=%s' % image, |
352 | 25b4d858 | Nikos Skalkotos | 'count=%d' % (p.end - p.start + 1), 'conv=notrunc', |
353 | 25b4d858 | Nikos Skalkotos | 'seek=%d' % p.start, 'skip=%d' % p.start) |
354 | 25b4d858 | Nikos Skalkotos | |
355 | 25b4d858 | Nikos Skalkotos | loop = str(losetup('-f', '--show', image)).strip() |
356 | 25b4d858 | Nikos Skalkotos | mapped = {} |
357 | 25b4d858 | Nikos Skalkotos | try:
|
358 | 25b4d858 | Nikos Skalkotos | for p in mounted: |
359 | 74149d07 | Nikos Skalkotos | i = p.num |
360 | 25b4d858 | Nikos Skalkotos | mapped[i] = self._map_partition(loop, i, p.start, p.end)
|
361 | 25b4d858 | Nikos Skalkotos | |
362 | bf15a033 | Nikos Skalkotos | new_uuid = {} |
363 | 25b4d858 | Nikos Skalkotos | # Create the file systems
|
364 | 25b4d858 | Nikos Skalkotos | for i, dev in mapped.iteritems(): |
365 | bf15a033 | Nikos Skalkotos | fs = filesystem[i].fs |
366 | 25b4d858 | Nikos Skalkotos | self.out.output('Creating %s filesystem on partition %d ... ' % |
367 | 25b4d858 | Nikos Skalkotos | (fs, i), False)
|
368 | 25b4d858 | Nikos Skalkotos | get_command('mkfs.%s' % fs)(*(MKFS_OPTS[fs] + [dev]))
|
369 | 25b4d858 | Nikos Skalkotos | self.out.success('done') |
370 | bf15a033 | Nikos Skalkotos | new_uuid[i] = blkid('-s', 'UUID', '-o', 'value', dev |
371 | bf15a033 | Nikos Skalkotos | ).stdout.strip() |
372 | 25b4d858 | Nikos Skalkotos | |
373 | 25b4d858 | Nikos Skalkotos | target = tempfile.mkdtemp() |
374 | 25b4d858 | Nikos Skalkotos | try:
|
375 | 25b4d858 | Nikos Skalkotos | absmpoints = self._mount(target,
|
376 | bf15a033 | Nikos Skalkotos | [(mapped[i], filesystem[i].mpoint) for i in mapped.keys()] |
377 | 25b4d858 | Nikos Skalkotos | ) |
378 | 74149d07 | Nikos Skalkotos | exclude = self._to_exclude() + [image]
|
379 | e6f134b3 | Nikos Skalkotos | rsync = Rsync('/', target,
|
380 | e6f134b3 | Nikos Skalkotos | map(lambda p: os.path.relpath(p, '/'), exclude)) |
381 | d15368cc | Nikos Skalkotos | rsync.archive().run(self.out)
|
382 | 25b4d858 | Nikos Skalkotos | |
383 | bf15a033 | Nikos Skalkotos | self._replace_uuids(target, new_uuid)
|
384 | bf15a033 | Nikos Skalkotos | |
385 | 25b4d858 | Nikos Skalkotos | finally:
|
386 | 25b4d858 | Nikos Skalkotos | self._umount_all(target)
|
387 | 25b4d858 | Nikos Skalkotos | os.rmdir(target) |
388 | 25b4d858 | Nikos Skalkotos | finally:
|
389 | 25b4d858 | Nikos Skalkotos | for dev in mapped.values(): |
390 | 25b4d858 | Nikos Skalkotos | self._unmap_partition(dev)
|
391 | 25b4d858 | Nikos Skalkotos | losetup('-d', loop)
|
392 | 25b4d858 | Nikos Skalkotos | |
393 | 567891a6 | Nikos Skalkotos | def create_image(self, image): |
394 | f3845095 | Nikos Skalkotos | """Given an image filename, this method will create an image out of the
|
395 | f3845095 | Nikos Skalkotos | running system.
|
396 | f3845095 | Nikos Skalkotos | """
|
397 | a939e3b8 | Nikos Skalkotos | |
398 | 567891a6 | Nikos Skalkotos | size = self.disk.device.getLength() * self.disk.device.sectorSize |
399 | a939e3b8 | Nikos Skalkotos | |
400 | a939e3b8 | Nikos Skalkotos | # Create sparse file to host the image
|
401 | 567891a6 | Nikos Skalkotos | fd = os.open(image, os.O_WRONLY | os.O_CREAT) |
402 | 567891a6 | Nikos Skalkotos | try:
|
403 | 567891a6 | Nikos Skalkotos | os.ftruncate(fd, size) |
404 | 567891a6 | Nikos Skalkotos | finally:
|
405 | 567891a6 | Nikos Skalkotos | os.close(fd) |
406 | 25b4d858 | Nikos Skalkotos | |
407 | 25b4d858 | Nikos Skalkotos | self._create_partition_table(image)
|
408 | bf15a033 | Nikos Skalkotos | |
409 | 25b4d858 | Nikos Skalkotos | end_sector = self._shrink_partitions(image)
|
410 | a939e3b8 | Nikos Skalkotos | |
411 | 25b4d858 | Nikos Skalkotos | # Check if the available space is enough to host the image
|
412 | 25b4d858 | Nikos Skalkotos | dirname = os.path.dirname(image) |
413 | 25b4d858 | Nikos Skalkotos | size = (end_sector + 1) * self.disk.device.sectorSize |
414 | 25b4d858 | Nikos Skalkotos | self.out.output("Examining available space in %s ..." % dirname, False) |
415 | 25b4d858 | Nikos Skalkotos | stat = os.statvfs(dirname) |
416 | 25b4d858 | Nikos Skalkotos | available = stat.f_bavail * stat.f_frsize |
417 | 25b4d858 | Nikos Skalkotos | if available <= size:
|
418 | 25b4d858 | Nikos Skalkotos | raise FatalError('Not enough space in %s to host the image' % |
419 | 25b4d858 | Nikos Skalkotos | dirname) |
420 | 25b4d858 | Nikos Skalkotos | self.out.success("sufficient") |
421 | 8eea5572 | Nikos Skalkotos | |
422 | 25b4d858 | Nikos Skalkotos | self._create_filesystems(image)
|
423 | 8eea5572 | Nikos Skalkotos | |
424 | 83fe59dd | Nikos Skalkotos | # Truncate image to the new size. I counldn't find a better way to do
|
425 | 83fe59dd | Nikos Skalkotos | # this. It seems that python's high level functions work in a different
|
426 | 83fe59dd | Nikos Skalkotos | # way.
|
427 | 83fe59dd | Nikos Skalkotos | fd = os.open(image, os.O_RDWR) |
428 | 83fe59dd | Nikos Skalkotos | try:
|
429 | 83fe59dd | Nikos Skalkotos | os.ftruncate(fd, size) |
430 | 83fe59dd | Nikos Skalkotos | finally:
|
431 | 83fe59dd | Nikos Skalkotos | os.close(fd) |
432 | 83fe59dd | Nikos Skalkotos | |
433 | 25b4d858 | Nikos Skalkotos | return image
|
434 | 9e4b4de2 | Nikos Skalkotos | |
435 | 9e4b4de2 | Nikos Skalkotos | # vim: set sta sts=4 shiftwidth=4 sw=4 et ai : |