vmdebootstrap

   1 #! /usr/bin/python
   2 # Copyright 2011-2013  Lars Wirzenius
   3 # Copyright 2012  Codethink Limited
   4 # Copyright 2014 Neil Williams <codehelp@debian.org>
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 import cliapp
  20 import crypt
  21 import logging
  22 import os
  23 import re
  24 import shutil
  25 import subprocess
  26 import tempfile
  27 import time
  28
  29
  30 __version__ = '0.6'
  31
  32
  33 class VmDebootstrap(cliapp.Application):
  34
  35     def add_settings(self):
  36         default_arch = subprocess.check_output(
  37             ["dpkg", "--print-architecture"]).strip()
  38
  39         self.settings.boolean(['verbose'], 'report what is going on')
  40         self.settings.string(['image'], 'put created disk image in FILE',
  41                              metavar='FILE')
  42         self.settings.bytesize(['size'],
  43                                'create a disk image of size SIZE (%default)',
  44                                metavar='SIZE',
  45                                default='1G')
  46         self.settings.bytesize(['bootsize'],
  47                                'create boot partition of size SIZE (%default)',
  48                                metavar='BOOTSIZE',
  49                                default='0%')
  50         self.settings.string(['boottype'],
  51                              'specify file system type for /boot/',
  52                              default='ext2')
  53         self.settings.string(['foreign'],
  54                              'set up foreign debootstrap environment using provided program (ie binfmt handler)')
  55         self.settings.string(['variant'],
  56                              'select debootstrap variant it not using the default')
  57         self.settings.boolean(['extlinux'], 'install extlinux?', default=True)
  58         self.settings.string(['tarball'], "tar up the disk's contents in FILE",
  59                              metavar='FILE')
  60         self.settings.string(['apt-mirror'],
  61                              'configure apt to use MIRROR',
  62                              metavar='URL')
  63         self.settings.string(['mirror'],
  64                              'use MIRROR as package source (%default)',
  65                              metavar='URL',
  66                              default='http://http.debian.net/debian/')
  67         self.settings.string(['arch'], 'architecture to use (%default)',
  68                              metavar='ARCH',
  69                              default=default_arch)
  70         self.settings.string(['distribution'],
  71                              'release to use (%default)',
  72                              metavar='NAME',
  73                              default='stable')
  74         self.settings.string_list(['package'], 'install PACKAGE onto system')
  75         self.settings.string_list(['custom-package'],
  76                                   'install package in DEB file onto system '
  77                                   '(not from mirror)',
  78                                   metavar='DEB')
  79         self.settings.boolean(['no-kernel'], 'do not install a linux package')
  80         self.settings.boolean(['enable-dhcp'], 'enable DHCP on eth0')
  81         self.settings.string(['root-password'], 'set root password',
  82                              metavar='PASSWORD')
  83         self.settings.boolean(['lock-root-password'],
  84                               'lock root account so they cannot login?')
  85         self.settings.string(['customize'],
  86                              'run SCRIPT after setting up system',
  87                              metavar='SCRIPT')
  88         self.settings.string(['hostname'],
  89                              'set name to HOSTNAME (%default)',
  90                              metavar='HOSTNAME',
  91                              default='debian')
  92         self.settings.string_list(['user'],
  93                                   'create USER with PASSWORD',
  94                                   metavar='USER/PASSWORD')
  95         self.settings.boolean(['serial-console'],
  96                               'configure image to use a serial console')
  97         self.settings.string(['serial-console-command'],
  98                              'command to manage the serial console, appended '
  99                              'to /etc/inittab (%default)',
 100                              metavar='COMMAND',
 101                              default='/sbin/getty -L ttyS0 115200 vt100')
 102         self.settings.boolean(['sudo'],
 103                               'install sudo, and if user is created, add them '
 104                               'to sudo group')
 105         self.settings.string(['owner'],
 106                              'the user who will own the image when the build '
 107                              'is complete.')
 108         self.settings.boolean(['squash'],
 109                               'use squashfs on the final image.')
 110         self.settings.boolean(['configure-apt'],
 111                               'Create an apt source based on the distribution '
 112                               'and mirror selected.')
 113         self.settings.boolean(['mbr'],
 114                               'Run install-mbr (no longer done by default)')
 115         self.settings.boolean(['grub'],
 116                               'Install and configure grub2 - disables '
 117                               'extlinux.')
 118         self.settings.boolean(['sparse'],
 119                               'Dont fill the image with zeros to keep a sparse disk image',
 120                               default=False)
 121         self.settings.boolean(['pkglist'],
 122                               'Create a list of package names included in '
 123                               'the image.')
 124         self.remove_dirs = []
 125         self.mount_points = []
 126
 127     def process_args(self, args):
 128         if not self.settings['image'] and not self.settings['tarball']:
 129             raise cliapp.AppException('You must give disk image filename, '
 130                                       'or tarball filename')
 131         if self.settings['image'] and not self.settings['size']:
 132             raise cliapp.AppException('If disk image is specified, '
 133                                       'You must give image size.')
 134
 135         self.remove_dirs = []
 136         self.mount_points = []
 137
 138         try:
 139             rootdev = None
 140             roottype = 'ext4'
 141             bootdev = None
 142             boottype = None
 143             rootdir = None
 144             if self.settings['image']:
 145                 self.create_empty_image()
 146                 self.partition_image()
 147                 if self.settings['mbr']:
 148                     self.install_mbr()
 149                 (rootdev, bootdev) = self.setup_kpartx()
 150                 self.mkfs(rootdev, fstype=roottype)
 151                 rootdir = self.mount(rootdev)
 152                 if bootdev:
 153                     if self.settings['boottype']:
 154                         boottype = self.settings['boottype']
 155                     else:
 156                         boottype = 'ext2'
 157                     self.mkfs(bootdev, fstype=boottype)
 158                     bootdir = '%s/%s' % (rootdir, 'boot/')
 159                     os.mkdir(bootdir)
 160                     bootdir = self.mount(bootdev, bootdir)
 161             else:
 162                 rootdir = self.mkdtemp()
 163             self.debootstrap(rootdir)
 164             self.set_hostname(rootdir)
 165             self.create_fstab(rootdir, rootdev, roottype, bootdev, boottype)
 166             self.install_debs(rootdir)
 167             self.cleanup_apt_cache(rootdir)
 168             self.set_root_password(rootdir)
 169             self.create_users(rootdir)
 170             self.remove_udev_persistent_rules(rootdir)
 171             self.setup_networking(rootdir)
 172             if self.settings['configure-apt'] or self.settings['apt-mirror']:
 173                 self.configure_apt(rootdir)
 174             self.customize(rootdir)
 175             self.update_initramfs(rootdir)
 176
 177             if self.settings['image']:
 178                 if self.settings['grub']:
 179                     self.install_grub2(rootdev, rootdir)
 180                 elif self.settings['extlinux']:
 181                     self.install_extlinux(rootdev, rootdir)
 182                 self.append_serial_console(rootdir)
 183                 self.optimize_image(rootdir)
 184                 if self.settings['squash']:
 185                     self.squash()
 186             if self.settings['pkglist']:
 187                 self.list_installed_pkgs(rootdir)
 188
 189             if self.settings['foreign']:
 190                 os.unlink('%s/usr/bin/%s' %
 191                           (rootdir, os.path.basename(self.settings['foreign'])))
 192
 193             if self.settings['tarball']:
 194                 self.create_tarball(rootdir)
 195
 196             if self.settings['owner']:
 197                 self.chown(rootdir)
 198         except BaseException, e:
 199             self.message('EEEK! Something bad happened...')
 200             if rootdir:
 201                 db_log = os.path.join(rootdir, 'debootstrap', 'debootstrap.log')
 202                 if os.path.exists(db_log):
 203                     shutil.copy(db_log, os.getcwd())
 204             self.message(e)
 205             self.cleanup_system()
 206             raise
 207         else:
 208             self.cleanup_system()
 209
 210     def message(self, msg):
 211         logging.info(msg)
 212         if self.settings['verbose']:
 213             print msg
 214
 215     def runcmd(self, argv, stdin='', ignore_fail=False, env=None, **kwargs):
 216         logging.debug('runcmd: %s %s %s', argv, env, kwargs)
 217         p = subprocess.Popen(argv, stdin=subprocess.PIPE,
 218                              stdout=subprocess.PIPE, stderr=subprocess.PIPE,
 219                              env=env, **kwargs)
 220         out, err = p.communicate(stdin)
 221         if p.returncode != 0:
 222             msg = 'command failed: %s\n%s\n%s' % (argv, out, err)
 223             logging.error(msg)
 224             if not ignore_fail:
 225                 raise cliapp.AppException(msg)
 226         return out
 227
 228     def mkdtemp(self):
 229         dirname = tempfile.mkdtemp()
 230         self.remove_dirs.append(dirname)
 231         logging.debug('mkdir %s', dirname)
 232         return dirname
 233
 234     def mount(self, device, path=None):
 235         if not path:
 236             mount_point = self.mkdtemp()
 237         else:
 238             mount_point = path
 239         self.message('Mounting %s on %s' % (device, mount_point))
 240         self.runcmd(['mount', device, mount_point])
 241         self.mount_points.append(mount_point)
 242         logging.debug('mounted %s on %s', device, mount_point)
 243         return mount_point
 244
 245     def create_empty_image(self):
 246         self.message('Creating disk image')
 247         self.runcmd(['qemu-img', 'create', '-f', 'raw',
 248                      self.settings['image'],
 249                      str(self.settings['size'])])
 250
 251     def partition_image(self):
 252         self.message('Creating partitions')
 253         self.runcmd(['parted', '-s', self.settings['image'],
 254                      'mklabel', 'msdos'])
 255         if self.settings['bootsize'] and self.settings['bootsize'] is not '0%':
 256             bootsize = str(self.settings['bootsize'] / (1024 * 1024))
 257             self.runcmd(['parted', '-s', self.settings['image'],
 258                          'mkpart', 'primary', 'fat16', '0%', bootsize])
 259         else:
 260             bootsize = '0%'
 261         self.runcmd(['parted', '-s', self.settings['image'],
 262                      'mkpart', 'primary', bootsize, '100%'])
 263         self.runcmd(['parted', '-s', self.settings['image'],
 264                      'set', '1', 'boot', 'on'])
 265
 266     def update_initramfs(self, rootdir):
 267         cmd = os.path.join('usr', 'sbin', 'update-initramfs')
 268         if os.path.exists(os.path.join(rootdir, cmd)):
 269             self.message("Updating the initramfs")
 270             self.runcmd(['chroot', rootdir, cmd, '-u'])
 271
 272     def install_mbr(self):
 273         if os.path.exists("/sbin/install-mbr"):
 274             self.message('Installing MBR')
 275             self.runcmd(['install-mbr', self.settings['image']])
 276
 277     def setup_kpartx(self):
 278         out = self.runcmd(['kpartx', '-avs', self.settings['image']])
 279         if self.settings['bootsize']:
 280             bootindex = 0
 281             rootindex = 1
 282             parts = 2
 283         else:
 284             rootindex = 0
 285             parts = 1
 286             boot = None
 287         devices = [line.split()[2]
 288                    for line in out.splitlines()
 289                    if line.startswith('add map ')]
 290         if len(devices) != parts:
 291             raise cliapp.AppException('Surprising number of partitions')
 292         root = '/dev/mapper/%s' % devices[rootindex]
 293         if self.settings['bootsize']:
 294             boot = '/dev/mapper/%s' % devices[bootindex]
 295         return (root, boot)
 296
 297     def mkfs(self, device, fstype):
 298         self.message('Creating filesystem %s' % fstype)
 299         self.runcmd(['mkfs', '-t', fstype, device])
 300
 301     def debootstrap(self, rootdir):
 302         msg = "(%s)" % self.settings['variant'] if self.settings['variant'] else ''
 303         self.message('Debootstrapping %s %s' % (self.settings['distribution'], msg))
 304
 305         if self.settings['foreign']:
 306             necessary_packages = []
 307         else:
 308             necessary_packages = ['acpid']
 309
 310         if self.settings['grub']:
 311             necessary_packages.append('grub2')
 312
 313         include = self.settings['package']
 314
 315         if not self.settings['no-kernel']:
 316             if self.settings['arch'] == 'i386':
 317                 kernel_arch = '486'
 318             else:
 319                 kernel_arch = self.settings['arch']
 320             kernel_image = 'linux-image-%s' % kernel_arch
 321             include.append(kernel_image)
 322
 323         if self.settings['sudo'] and 'sudo' not in include:
 324             include.append('sudo')
 325
 326         args = ['debootstrap', '--arch=%s' % self.settings['arch']]
 327         if self.settings['package'] and len(necessary_packages) > 0:
 328             args.append(
 329                 '--include=%s' % ','.join(necessary_packages + include))
 330         if self.settings['foreign']:
 331             args.append('--foreign')
 332         if self.settings['variant']:
 333             args.append('--variant')
 334             args.append(self.settings['variant'])
 335         args += [self.settings['distribution'],
 336                  rootdir, self.settings['mirror']]
 337         logging.debug(" ".join(args))
 338         self.runcmd(args)
 339         if self.settings['foreign']:
 340             # set a noninteractive debconf environment for secondstage
 341             env = {
 342                 "DEBIAN_FRONTEND": "noninteractive",
 343                 "DEBCONF_NONINTERACTIVE_SEEN": "true",
 344                 "LC_ALL": "C"
 345             }
 346             # add the mapping to the complete environment.
 347             env.update(os.environ)
 348             # First copy the binfmt handler over
 349             self.message('Setting up binfmt handler')
 350             shutil.copy(self.settings['foreign'], '%s/usr/bin/' % rootdir)
 351             # Next, run the package install scripts etc.
 352             self.message('Running debootstrap second stage')
 353             self.runcmd(['chroot', rootdir,
 354                          '/debootstrap/debootstrap', '--second-stage'],
 355                         env=env)
 356
 357     def set_hostname(self, rootdir):
 358         hostname = self.settings['hostname']
 359         with open(os.path.join(rootdir, 'etc', 'hostname'), 'w') as f:
 360             f.write('%s\n' % hostname)
 361
 362         etc_hosts = os.path.join(rootdir, 'etc', 'hosts')
 363         try:
 364             with open(etc_hosts, 'r') as f:
 365                 data = f.read()
 366             with open(etc_hosts, 'w') as f:
 367                 for line in data.splitlines():
 368                     if line.startswith('127.0.0.1'):
 369                         line += ' %s' % hostname
 370                     f.write('%s\n' % line)
 371         except IOError:
 372             pass
 373
 374     def create_fstab(self, rootdir, rootdev, roottype, bootdev, boottype):
 375         def fsuuid(device):
 376             out = self.runcmd(['blkid', '-c', '/dev/null', '-o', 'value',
 377                                '-s', 'UUID', device])
 378             return out.splitlines()[0].strip()
 379
 380         if rootdev:
 381             rootdevstr = 'UUID=%s' % fsuuid(rootdev)
 382         else:
 383             rootdevstr = '/dev/sda1'
 384
 385         if bootdev:
 386             bootdevstr = 'UUID=%s' % fsuuid(bootdev)
 387         else:
 388             bootdevstr = None
 389
 390         fstab = os.path.join(rootdir, 'etc', 'fstab')
 391         with open(fstab, 'w') as f:
 392             f.write('proc /proc proc defaults 0 0\n')
 393             f.write('%s / %s errors=remount-ro 0 1\n' % (rootdevstr, roottype))
 394             if bootdevstr:
 395                 f.write('%s /boot %s errors=remount-ro 0 2\n' % (bootdevstr, boottype))
 396
 397     def install_debs(self, rootdir):
 398         if not self.settings['custom-package']:
 399             return
 400         self.message('Installing custom packages')
 401         tmp = os.path.join(rootdir, 'tmp', 'install_debs')
 402         os.mkdir(tmp)
 403         for deb in self.settings['custom-package']:
 404             shutil.copy(deb, tmp)
 405         filenames = [os.path.join('/tmp/install_debs', os.path.basename(deb))
 406                      for deb in self.settings['custom-package']]
 407         out, err, exitcode = \
 408             self.runcmd_unchecked(['chroot', rootdir, 'dpkg', '-i'] + filenames)
 409         logging.debug('stdout:\n%s', out)
 410         logging.debug('stderr:\n%s', err)
 411         out = self.runcmd(['chroot', rootdir,
 412                            'apt-get', '-f', '--no-remove', 'install'])
 413         logging.debug('stdout:\n%s', out)
 414         shutil.rmtree(tmp)
 415
 416     def cleanup_apt_cache(self, rootdir):
 417         out = self.runcmd(['chroot', rootdir, 'apt-get', 'clean'])
 418         logging.debug('stdout:\n%s', out)
 419
 420     def set_root_password(self, rootdir):
 421         if self.settings['root-password']:
 422             self.message('Setting root password')
 423             self.set_password(rootdir, 'root', self.settings['root-password'])
 424         elif self.settings['lock-root-password']:
 425             self.message('Locking root password')
 426             self.runcmd(['chroot', rootdir, 'passwd', '-l', 'root'])
 427         else:
 428             self.message('Give root an empty password')
 429             self.delete_password(rootdir, 'root')
 430
 431     def create_users(self, rootdir):
 432         def create_user(user):
 433             self.runcmd(['chroot', rootdir, 'adduser', '--gecos', user,
 434                          '--disabled-password', user])
 435             if self.settings['sudo']:
 436                 self.runcmd(['chroot', rootdir, 'adduser', user, 'sudo'])
 437
 438         for userpass in self.settings['user']:
 439             if '/' in userpass:
 440                 user, password = userpass.split('/', 1)
 441                 create_user(user)
 442                 self.set_password(rootdir, user, password)
 443             else:
 444                 create_user(userpass)
 445                 self.delete_password(rootdir, userpass)
 446
 447     def set_password(self, rootdir, user, password):
 448         encrypted = crypt.crypt(password, '..')
 449         self.runcmd(['chroot', rootdir, 'usermod', '-p', encrypted, user])
 450
 451     def delete_password(self, rootdir, user):
 452         self.runcmd(['chroot', rootdir, 'passwd', '-d', user])
 453
 454     def remove_udev_persistent_rules(self, rootdir):
 455         self.message('Removing udev persistent cd and net rules')
 456         for x in ['70-persistent-cd.rules', '70-persistent-net.rules']:
 457             pathname = os.path.join(rootdir, 'etc', 'udev', 'rules.d', x)
 458             if os.path.exists(pathname):
 459                 logging.debug('rm %s', pathname)
 460                 os.remove(pathname)
 461             else:
 462                 logging.debug('not removing non-existent %s', pathname)
 463
 464     def setup_networking(self, rootdir):
 465         self.message('Setting up networking')
 466
 467         f = open(os.path.join(rootdir, 'etc', 'network', 'interfaces'), 'w')
 468         f.write('auto lo\n')
 469         f.write('iface lo inet loopback\n')
 470
 471         if self.settings['enable-dhcp']:
 472             f.write('\n')
 473             f.write('auto eth0\n')
 474             f.write('iface eth0 inet dhcp\n')
 475
 476         f.close()
 477
 478     def append_serial_console(self, rootdir):
 479         if self.settings['serial-console']:
 480             serial_command = self.settings['serial-console-command']
 481             logging.debug('adding getty to serial console')
 482             inittab = os.path.join(rootdir, 'etc/inittab')
 483             # to autologin, serial_command can contain '-a root'
 484             with open(inittab, 'a') as f:
 485                 f.write('\nS0:23:respawn:%s\n' % serial_command)
 486
 487     def install_grub2(self, rootdev, rootdir):
 488         self.message("Configuring grub2")
 489         # rely on kpartx using consistent naming to map loop0p1 to loop0
 490         install_dev = os.path.join('/dev', os.path.basename(rootdev)[:-2])
 491         self.runcmd(['mount', '/dev', '-t', 'devfs', '-obind',
 492                      '%s' % os.path.join(rootdir, 'dev')])
 493         self.runcmd(['mount', '/proc', '-t', 'proc', '-obind',
 494                      '%s' % os.path.join(rootdir, 'proc')])
 495         self.runcmd(['mount', '/sys', '-t', 'sysfs', '-obind',
 496                      '%s' % os.path.join(rootdir, 'sys')])
 497         try:
 498             self.runcmd(['chroot', rootdir, 'update-grub'])
 499             self.runcmd(['chroot', rootdir, 'grub-install', install_dev])
 500         except cliapp.AppException as e:
 501             self.message("Failed. Is grub2-common installed? Using extlinux.")
 502         self.runcmd(['umount', os.path.join(rootdir, 'sys')])
 503         self.runcmd(['umount', os.path.join(rootdir, 'proc')])
 504         self.runcmd(['umount', os.path.join(rootdir, 'dev')])
 505         self.install_extlinux(rootdev, rootdir)
 506
 507     def install_extlinux(self, rootdev, rootdir):
 508         if not os.path.exists("/usr/bin/extlinux"):
 509             self.message("extlinux not installed, skipping.")
 510             return
 511         self.message('Installing extlinux')
 512
 513         def find(pattern):
 514             dirname = os.path.join(rootdir, 'boot')
 515             basenames = os.listdir(dirname)
 516             logging.debug('find: %s', basenames)
 517             for basename in basenames:
 518                 if re.search(pattern, basename):
 519                     return os.path.join('boot', basename)
 520             raise cliapp.AppException('Cannot find match: %s' % pattern)
 521
 522         try:
 523             kernel_image = find('vmlinuz-.*')
 524             initrd_image = find('initrd.img-.*')
 525         except cliapp.AppException as e:
 526             self.message("Unable to find kernel. Not installing extlinux.")
 527             logging.debug("No kernel found. %s. Skipping install of extlinux.", e)
 528             return
 529
 530         out = self.runcmd(['blkid', '-c', '/dev/null', '-o', 'value',
 531                            '-s', 'UUID', rootdev])
 532         uuid = out.splitlines()[0].strip()
 533
 534         conf = os.path.join(rootdir, 'extlinux.conf')
 535         logging.debug('configure extlinux %s', conf)
 536         f = open(conf, 'w')
 537         f.write('''
 538 default linux
 539 timeout 1
 540
 541 label linux
 542 kernel %(kernel)s
 543 append initrd=%(initrd)s root=UUID=%(uuid)s ro %(kserial)s
 544 %(extserial)s
 545 ''' % {
 546             'kernel': kernel_image,
 547             'initrd': initrd_image,
 548             'uuid': uuid,
 549             'kserial':
 550             'console=ttyS0,115200' if self.settings['serial-console'] else '',
 551             'extserial': 'serial 0 115200' if self.settings['serial-console'] else '',
 552         })
 553         f.close()
 554
 555         self.runcmd(['extlinux', '--install', rootdir])
 556         self.runcmd(['sync'])
 557         time.sleep(2)
 558
 559     def optimize_image(self, rootdir):
 560         """
 561         Filing up the image with zeros will increase its compression rate
 562         """
 563         if not self.settings['sparse']:
 564             zeros = os.path.join(rootdir, 'ZEROS')
 565             self.runcmd_unchecked(['dd', 'if=/dev/zero', 'of=' + zeros, 'bs=1M'])
 566             self.runcmd(['rm', '-f', zeros])
 567
 568     def squash(self):
 569         """
 570         Run squashfs on the image.
 571         """
 572         if not os.path.exists('/usr/bin/mksquashfs'):
 573             logging.warning("Squash selected but mksquashfs not found!")
 574             return
 575         self.message("Running mksquashfs")
 576         suffixed = "%s.squashfs" % self.settings['image']
 577         self.runcmd(['mksquashfs', self.settings['image'],
 578                      suffixed,
 579                      '-no-progress', '-comp', 'xz'], ignore_fail=False)
 580         os.unlink(self.settings['image'])
 581         self.settings['image'] = suffixed
 582
 583     def cleanup_system(self):
 584         # Clean up after any errors.
 585
 586         self.message('Cleaning up')
 587
 588         # Umount in the reverse mount order
 589         if self.settings['image']:
 590             for i in xrange(len(self.mount_points) - 1, -1, -1):
 591                 mount_point = self.mount_points[i]
 592                 try:
 593                     self.runcmd(['umount', mount_point], ignore_fail=False)
 594                 except cliapp.AppException:
 595                     logging.debug("umount failed, sleeping and trying again")
 596                     time.sleep(5)
 597                     self.runcmd(['umount', mount_point], ignore_fail=False)
 598
 599             self.runcmd(['kpartx', '-d', self.settings['image']], ignore_fail=True)
 600
 601         for dirname in self.remove_dirs:
 602             shutil.rmtree(dirname)
 603
 604     def customize(self, rootdir):
 605         script = self.settings['customize']
 606         if not script:
 607             return
 608         if not os.path.exists(script):
 609             example = os.path.join("/usr/share/vmdebootstrap/examples/", script)
 610             if not os.path.exists(example):
 611                 self.message("Unable to find %s" % script)
 612                 return
 613             script = example
 614         self.message('Running customize script %s' % script)
 615         with open('/dev/tty', 'w') as tty:
 616             cliapp.runcmd([script, rootdir], stdout=tty, stderr=tty)
 617
 618     def create_tarball(self, rootdir):
 619         # Create a tarball of the disk's contents
 620         # shell out to runcmd since it more easily handles rootdir
 621         self.message('Creating tarball of disk contents')
 622         self.runcmd(['tar', '-cf', self.settings['tarball'], '-C', rootdir, '.'])
 623
 624     def chown(self, rootdir):
 625         # Change image owner after completed build
 626         self.message("Changing owner to %s" % self.settings["owner"])
 627         subprocess.call(["chown",
 628                          self.settings["owner"],
 629                          self.settings["image"]])
 630
 631     def list_installed_pkgs(self, rootdir):
 632         # output the list of installed packages for sources identification
 633         self.message("Creating a list of installed binary package names")
 634         out = self.runcmd(['chroot', rootdir,
 635                            'dpkg-query', '-W' "-f='${Package}.deb\n'"])
 636         with open('dpkg.list', 'w') as dpkg:
 637             dpkg.write(out)
 638
 639     def configure_apt(self, rootdir):
 640         # use the distribution and mirror to create an apt source
 641         self.message("Configuring apt to use distribution and mirror")
 642         conf = os.path.join(rootdir, 'etc', 'apt', 'sources.list.d', 'base.list')
 643         logging.debug('configure apt %s', conf)
 644         mirror = self.settings['mirror']
 645         if self.settings['apt-mirror']:
 646             mirror = self.settings['apt-mirror']
 647             self.message("Setting apt mirror to %s" % mirror)
 648         os.unlink(os.path.join(rootdir, 'etc', 'apt', 'sources.list'))
 649         f = open(conf, 'w')
 650         f.write('''
 651 deb %(mirror)s %(distribution)s main
 652 #deb-src %(mirror)s %(distribution)s main
 653 ''' % {
 654             'mirror': mirror,
 655             'distribution': self.settings['distribution']
 656         })
 657         f.close()
 658
 659 if __name__ == '__main__':
 660     VmDebootstrap(version=__version__).run()