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__ = '0.4'
  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(['mirror'],
  61                              'use MIRROR as package source (%default)',
  62                              metavar='URL',
  63                              default='http://cdn.debian.net/debian/')
  64         self.settings.string(['arch'], 'architecture to use (%default)',
  65                              metavar='ARCH',
  66                              default=default_arch)
  67         self.settings.string(['distribution'],
  68                              'release to use (%default)',
  69                              metavar='NAME',
  70                              default='stable')
  71         self.settings.string_list(['package'], 'install PACKAGE onto system')
  72         self.settings.string_list(['custom-package'],
  73                                   'install package in DEB file onto system '
  74                                   '(not from mirror)',
  75                                   metavar='DEB')
  76         self.settings.boolean(['no-kernel'], 'do not install a linux package')
  77         self.settings.boolean(['enable-dhcp'], 'enable DHCP on eth0')
  78         self.settings.string(['root-password'], 'set root password',
  79                              metavar='PASSWORD')
  80         self.settings.boolean(['lock-root-password'],
  81                               'lock root account so they cannot login?')
  82         self.settings.string(['customize'],
  83                              'run SCRIPT after setting up system',
  84                              metavar='SCRIPT')
  85         self.settings.string(['hostname'],
  86                              'set name to HOSTNAME (%default)',
  87                              metavar='HOSTNAME',
  88                              default='debian')
  89         self.settings.string_list(['user'],
  90                                   'create USER with PASSWORD',
  91                                   metavar='USER/PASSWORD')
  92         self.settings.boolean(['serial-console'],
  93                               'configure image to use a serial console')
  94         self.settings.string(['serial-console-command'],
  95                              'command to manage the serial console, appended '
  96                              'to /etc/inittab (%default)',
  97                              metavar='COMMAND',
  98                              default='/sbin/getty -L ttyS0 115200 vt100')
  99         self.settings.boolean(['sudo'],
 100                               'install sudo, and if user is created, add them '
 101                               'to sudo group')
 102         self.settings.string(['owner'],
 103                              'the user who will own the image when the build '
 104                              'is complete.')
 105         self.settings.boolean(['squash'],
 106                               'use squashfs on the final image.')
 107         self.settings.boolean(['configure-apt'],
 108                               'Create an apt source based on the distribution '
 109                               'and mirror selected.')
 110         self.settings.boolean(['mbr'],
 111                               'Run install-mbr (no longer done by default)')
 112         self.settings.boolean(['grub'],
 113                               'Install and configure grub2 - disables '
 114                               'extlinux.')
 115
 116     def process_args(self, args):
 117         if not self.settings['image'] and not self.settings['tarball']:
 118             raise cliapp.AppException('You must give disk image filename, '
 119                                       'or tarball filename')
 120         if self.settings['image'] and not self.settings['size']:
 121             raise cliapp.AppException('If disk image is specified, '
 122                                       'You must give image size.')
 123
 124         self.remove_dirs = []
 125         self.mount_points = []
 126
 127         try:
 128             rootdev = None
 129             roottype = 'ext4'
 130             bootdev = None
 131             boottype = None
 132             rootdir = None
 133             if self.settings['image']:
 134                 self.create_empty_image()
 135                 self.partition_image()
 136                 if self.settings['mbr']:
 137                     self.install_mbr()
 138                 (rootdev, bootdev) = self.setup_kpartx()
 139                 self.mkfs(rootdev, type=roottype)
 140                 rootdir = self.mount(rootdev)
 141                 if bootdev:
 142                     if self.settings['boottype']:
 143                         boottype = self.settings['boottype']
 144                     else:
 145                         boottype = 'ext2'
 146                     self.mkfs(bootdev, type=boottype)
 147                     bootdir = '%s/%s' % (rootdir, 'boot/')
 148                     os.mkdir(bootdir)
 149                     bootdir = self.mount(bootdev, bootdir)
 150             else:
 151                 rootdir = self.mkdtemp()
 152             self.debootstrap(rootdir)
 153             self.set_hostname(rootdir)
 154             self.create_fstab(rootdir, rootdev, roottype, bootdev, boottype)
 155             self.install_debs(rootdir)
 156             self.cleanup_apt_cache(rootdir)
 157             self.set_root_password(rootdir)
 158             self.create_users(rootdir)
 159             self.remove_udev_persistent_rules(rootdir)
 160             self.setup_networking(rootdir)
 161             if self.settings['configure-apt']:
 162                 self.configure_apt(rootdir)
 163             self.customize(rootdir)
 164             self.update_initramfs(rootdir)
 165
 166             if self.settings['image']:
 167                 if self.settings['grub']:
 168                     self.install_grub2(rootdev, rootdir)
 169                 elif self.settings['extlinux']:
 170                     self.install_extlinux(rootdev, rootdir)
 171                 self.append_serial_console(rootdir)
 172                 self.optimize_image(rootdir)
 173                 if self.settings['squash']:
 174                     self.squash()
 175
 176             if self.settings['foreign']:
 177                 os.unlink('%s/usr/bin/%s' %
 178                           (rootdir, os.path.basename(self.settings['foreign'])))
 179
 180             if self.settings['tarball']:
 181                 self.create_tarball(rootdir)
 182
 183             if self.settings['owner']:
 184                 self.chown(rootdir)
 185         except BaseException, e:
 186             self.message('EEEK! Something bad happened...')
 187             if rootdir:
 188                 db_log = os.path.join(rootdir, 'debootstrap', 'debootstrap.log')
 189                 if os.path.exists(db_log):
 190                     shutil.copy(db_log, os.getcwd())
 191             self.message(e)
 192             self.cleanup_system()
 193             raise
 194         else:
 195             self.cleanup_system()
 196
 197     def message(self, msg):
 198         logging.info(msg)
 199         if self.settings['verbose']:
 200             print msg
 201
 202     def runcmd(self, argv, stdin='', ignore_fail=False, env=None, **kwargs):
 203         logging.debug('runcmd: %s %s %s' % (argv, env, kwargs))
 204         p = subprocess.Popen(argv, stdin=subprocess.PIPE,
 205                              stdout=subprocess.PIPE, stderr=subprocess.PIPE,
 206                              env=env, **kwargs)
 207         out, err = p.communicate(stdin)
 208         if p.returncode != 0:
 209             msg = 'command failed: %s\n%s\n%s' % (argv, out, err)
 210             logging.error(msg)
 211             if not ignore_fail:
 212                 raise cliapp.AppException(msg)
 213         return out
 214
 215     def mkdtemp(self):
 216         dirname = tempfile.mkdtemp()
 217         self.remove_dirs.append(dirname)
 218         logging.debug('mkdir %s' % dirname)
 219         return dirname
 220
 221     def mount(self, device, path=None):
 222         if not path:
 223             mount_point = self.mkdtemp()
 224         else:
 225             mount_point = path
 226         self.message('Mounting %s on %s' % (device, mount_point))
 227         self.runcmd(['mount', device, mount_point])
 228         self.mount_points.append(mount_point)
 229         logging.debug('mounted %s on %s' % (device, mount_point))
 230         return mount_point
 231
 232     def create_empty_image(self):
 233         self.message('Creating disk image')
 234         self.runcmd(['qemu-img', 'create', '-f', 'raw',
 235                      self.settings['image'],
 236                      str(self.settings['size'])])
 237
 238     def partition_image(self):
 239         self.message('Creating partitions')
 240         self.runcmd(['parted', '-s', self.settings['image'],
 241                      'mklabel', 'msdos'])
 242         if self.settings['bootsize'] and self.settings['bootsize'] is not '0%':
 243             bootsize = str(self.settings['bootsize'] / (1024 * 1024))
 244             self.runcmd(['parted', '-s', self.settings['image'],
 245                          'mkpart', 'primary', 'fat16', '0', bootsize])
 246         else:
 247             bootsize = '0%'
 248         self.runcmd(['parted', '-s', self.settings['image'],
 249                      'mkpart', 'primary', bootsize, '100%'])
 250         self.runcmd(['parted', '-s', self.settings['image'],
 251                      'set', '1', 'boot', 'on'])
 252
 253     def update_initramfs(self, rootdir):
 254         cmd = os.path.join('usr', 'sbin', 'update-initramfs')
 255         if os.path.exists(os.path.join(rootdir, cmd)):
 256             self.message("Updating the initramfs")
 257             self.runcmd(['chroot', rootdir, cmd, '-u'])
 258
 259     def install_mbr(self):
 260         if os.path.exists("/sbin/install-mbr"):
 261             self.message('Installing MBR')
 262             self.runcmd(['install-mbr', self.settings['image']])
 263
 264     def setup_kpartx(self):
 265         out = self.runcmd(['kpartx', '-avs', self.settings['image']])
 266         if self.settings['bootsize']:
 267             bootindex = 0
 268             rootindex = 1
 269             parts = 2
 270         else:
 271             rootindex = 0
 272             parts = 1
 273             boot = None
 274         devices = [line.split()[2]
 275                    for line in out.splitlines()
 276                    if line.startswith('add map ')]
 277         if len(devices) != parts:
 278             raise cliapp.AppException('Surprising number of partitions')
 279         root = '/dev/mapper/%s' % devices[rootindex]
 280         if self.settings['bootsize']:
 281             boot = '/dev/mapper/%s' % devices[bootindex]
 282         return (root, boot)
 283
 284     def mkfs(self, device, type):
 285         self.message('Creating filesystem %s' % type)
 286         self.runcmd(['mkfs', '-t', type, device])
 287
 288     def debootstrap(self, rootdir):
 289         self.message('Debootstrapping')
 290
 291         if self.settings['foreign']:
 292             necessary_packages = []
 293         else:
 294             necessary_packages = ['acpid']
 295
 296         if self.settings['grub']:
 297             necessary_packages.append('grub2')
 298
 299         include = self.settings['package']
 300
 301         if not self.settings['no-kernel']:
 302             if self.settings['arch'] == 'i386':
 303                 kernel_arch = '486'
 304             else:
 305                 kernel_arch = self.settings['arch']
 306             kernel_image = 'linux-image-%s' % kernel_arch
 307             include.append(kernel_image)
 308
 309         if self.settings['sudo'] and 'sudo' not in include:
 310             include.append('sudo')
 311
 312         args = ['debootstrap', '--arch=%s' % self.settings['arch']]
 313         if self.settings['package'] and len(necessary_packages) > 0:
 314             args.append(
 315                 '--include=%s' % ','.join(necessary_packages + include))
 316         if self.settings['foreign']:
 317             args.append('--foreign')
 318         if self.settings['variant']:
 319             args.append('--variant')
 320             args.append(self.settings['variant'])
 321         args += [self.settings['distribution'],
 322                  rootdir, self.settings['mirror']]
 323         logging.debug(" ".join(args))
 324         self.runcmd(args)
 325         if self.settings['foreign']:
 326             # set a noninteractive debconf environment for secondstage
 327             env = {
 328                 "DEBIAN_FRONTEND": "noninteractive",
 329                 "DEBCONF_NONINTERACTIVE_SEEN": "true",
 330                 "LC_ALL": "C"
 331             }
 332             # add the mapping to the complete environment.
 333             env.update(os.environ)
 334             # First copy the binfmt handler over
 335             self.message('Setting up binfmt handler')
 336             shutil.copy(self.settings['foreign'], '%s/usr/bin/' % rootdir)
 337             # Next, run the package install scripts etc.
 338             self.message('Running debootstrap second stage')
 339             self.runcmd(['chroot', rootdir,
 340                          '/debootstrap/debootstrap', '--second-stage'],
 341                         env=env)
 342
 343     def set_hostname(self, rootdir):
 344         hostname = self.settings['hostname']
 345         with open(os.path.join(rootdir, 'etc', 'hostname'), 'w') as f:
 346             f.write('%s\n' % hostname)
 347
 348         etc_hosts = os.path.join(rootdir, 'etc', 'hosts')
 349         try:
 350             with open(etc_hosts, 'r') as f:
 351                 data = f.read()
 352             with open(etc_hosts, 'w') as f:
 353                 for line in data.splitlines():
 354                     if line.startswith('127.0.0.1'):
 355                         line += ' %s' % hostname
 356                     f.write('%s\n' % line)
 357         except IOError, e:
 358             pass
 359
 360     def create_fstab(self, rootdir, rootdev, roottype, bootdev, boottype):
 361         def fsuuid(device):
 362             out = self.runcmd(['blkid', '-c', '/dev/null', '-o', 'value',
 363                                '-s', 'UUID', device])
 364             return out.splitlines()[0].strip()
 365
 366         if rootdev:
 367             rootdevstr = 'UUID=%s' % fsuuid(rootdev)
 368         else:
 369             rootdevstr = '/dev/sda1'
 370
 371         if bootdev:
 372             bootdevstr = 'UUID=%s' % fsuuid(bootdev)
 373         else:
 374             bootdevstr = None
 375
 376         fstab = os.path.join(rootdir, 'etc', 'fstab')
 377         with open(fstab, 'w') as f:
 378             f.write('proc /proc proc defaults 0 0\n')
 379             f.write('%s / %s errors=remount-ro 0 1\n' % (rootdevstr, roottype))
 380             if bootdevstr:
 381                 f.write('%s /boot %s errors=remount-ro 0 2\n' % (bootdevstr, boottype))
 382
 383     def install_debs(self, rootdir):
 384         if not self.settings['custom-package']:
 385             return
 386         self.message('Installing custom packages')
 387         tmp = os.path.join(rootdir, 'tmp', 'install_debs')
 388         os.mkdir(tmp)
 389         for deb in self.settings['custom-package']:
 390             shutil.copy(deb, tmp)
 391         filenames = [os.path.join('/tmp/install_debs', os.path.basename(deb))
 392                      for deb in self.settings['custom-package']]
 393         out, err, exit = \
 394             self.runcmd_unchecked(['chroot', rootdir, 'dpkg', '-i'] + filenames)
 395         logging.debug('stdout:\n%s' % out)
 396         logging.debug('stderr:\n%s' % err)
 397         out = self.runcmd(['chroot', rootdir,
 398                           'apt-get', '-f', '--no-remove', 'install'])
 399         logging.debug('stdout:\n%s' % out)
 400         shutil.rmtree(tmp)
 401
 402     def cleanup_apt_cache(self, rootdir):
 403         out = self.runcmd(['chroot', rootdir, 'apt-get', 'clean'])
 404         logging.debug('stdout:\n%s' % out)
 405
 406     def set_root_password(self, rootdir):
 407         if self.settings['root-password']:
 408             self.message('Setting root password')
 409             self.set_password(rootdir, 'root', self.settings['root-password'])
 410         elif self.settings['lock-root-password']:
 411             self.message('Locking root password')
 412             self.runcmd(['chroot', rootdir, 'passwd', '-l', 'root'])
 413         else:
 414             self.message('Give root an empty password')
 415             self.delete_password(rootdir, 'root')
 416
 417     def create_users(self, rootdir):
 418         def create_user(user):
 419             self.runcmd(['chroot', rootdir, 'adduser', '--gecos', user,
 420                          '--disabled-password', user])
 421             if self.settings['sudo']:
 422                 self.runcmd(['chroot', rootdir, 'adduser', user, 'sudo'])
 423
 424         for userpass in self.settings['user']:
 425             if '/' in userpass:
 426                 user, password = userpass.split('/', 1)
 427                 create_user(user)
 428                 self.set_password(rootdir, user, password)
 429             else:
 430                 create_user(userpass)
 431                 self.delete_password(rootdir, userpass)
 432
 433     def set_password(self, rootdir, user, password):
 434         encrypted = crypt.crypt(password, '..')
 435         self.runcmd(['chroot', rootdir, 'usermod', '-p', encrypted, user])
 436
 437     def delete_password(self, rootdir, user):
 438         self.runcmd(['chroot', rootdir, 'passwd', '-d', user])
 439
 440     def remove_udev_persistent_rules(self, rootdir):
 441         self.message('Removing udev persistent cd and net rules')
 442         for x in ['70-persistent-cd.rules', '70-persistent-net.rules']:
 443             pathname = os.path.join(rootdir, 'etc', 'udev', 'rules.d', x)
 444             if os.path.exists(pathname):
 445                 logging.debug('rm %s' % pathname)
 446                 os.remove(pathname)
 447             else:
 448                 logging.debug('not removing non-existent %s' % pathname)
 449
 450     def setup_networking(self, rootdir):
 451         self.message('Setting up networking')
 452
 453         f = open(os.path.join(rootdir, 'etc', 'network', 'interfaces'), 'w')
 454         f.write('auto lo\n')
 455         f.write('iface lo inet loopback\n')
 456
 457         if self.settings['enable-dhcp']:
 458             f.write('\n')
 459             f.write('auto eth0\n')
 460             f.write('iface eth0 inet dhcp\n')
 461
 462         f.close()
 463
 464     def append_serial_console(self, rootdir):
 465         if self.settings['serial-console']:
 466             serial_command = self.settings['serial-console-command']
 467             logging.debug('adding getty to serial console')
 468             inittab = os.path.join(rootdir, 'etc/inittab')
 469             with open(inittab, 'a') as f:
 470                 f.write('\nS0:23:respawn:%s\n' % serial_command)
 471
 472     def install_grub2(self, rootdev, rootdir):
 473         self.message("Configuring grub2")
 474         # rely on kpartx using consistent naming to map loop0p1 to loop0
 475         install_dev = os.path.join('/dev', os.path.basename(rootdev)[:-2])
 476         self.runcmd(['mount', '/dev', '-t', 'devfs', '-obind',
 477                     '%s' % os.path.join(rootdir, 'dev')])
 478         self.runcmd(['mount', '/proc', '-t', 'proc', '-obind',
 479                     '%s' % os.path.join(rootdir, 'proc')])
 480         self.runcmd(['mount', '/sys', '-t', 'sysfs', '-obind',
 481                     '%s' % os.path.join(rootdir, 'sys')])
 482         try:
 483             self.runcmd(['chroot', rootdir, 'update-grub'])
 484             self.runcmd(['chroot', rootdir, 'grub-install', install_dev])
 485         except cliapp.AppException as e:
 486             self.message("Failed to configure grub2. Using extlinux.")
 487         self.runcmd(['umount', os.path.join(rootdir, 'sys')])
 488         self.runcmd(['umount', os.path.join(rootdir, 'proc')])
 489         self.runcmd(['umount', os.path.join(rootdir, 'dev')])
 490         self.install_extlinux(rootdev, rootdir)
 491
 492     def install_extlinux(self, rootdev, rootdir):
 493         if not os.path.exists("/usr/bin/extlinux"):
 494             self.message("extlinux not installed, skipping.")
 495             return
 496         self.message('Installing extlinux')
 497
 498         def find(pattern):
 499             dirname = os.path.join(rootdir, 'boot')
 500             basenames = os.listdir(dirname)
 501             logging.debug('find: %s' % basenames)
 502             for basename in basenames:
 503                 if re.search(pattern, basename):
 504                     return os.path.join('boot', basename)
 505             raise cliapp.AppException('Cannot find match: %s' % pattern)
 506
 507         try:
 508             kernel_image = find('vmlinuz-.*')
 509             initrd_image = find('initrd.img-.*')
 510         except cliapp.AppException as e:
 511             self.message("Unable to find kernel. Not installing extlinux.")
 512             logging.debug("No kernel found. %s. Skipping install of extlinux." % e)
 513             return
 514
 515         out = self.runcmd(['blkid', '-c', '/dev/null', '-o', 'value',
 516                            '-s', 'UUID', rootdev])
 517         uuid = out.splitlines()[0].strip()
 518
 519         conf = os.path.join(rootdir, 'extlinux.conf')
 520         logging.debug('configure extlinux %s' % conf)
 521         f = open(conf, 'w')
 522         f.write('''
 523 default linux
 524 timeout 1
 525
 526 label linux
 527 kernel %(kernel)s
 528 append initrd=%(initrd)s root=UUID=%(uuid)s ro %(kserial)s
 529 %(extserial)s
 530 ''' % {
 531             'kernel': kernel_image,
 532             'initrd': initrd_image,
 533             'uuid': uuid,
 534             'kserial':
 535             'console=ttyS0,115200' if self.settings['serial-console'] else '',
 536             'extserial': 'serial 0 115200' if self.settings['serial-console'] else '',
 537         })
 538         f.close()
 539
 540         self.runcmd(['extlinux', '--install', rootdir])
 541         self.runcmd(['sync'])
 542         time.sleep(2)
 543
 544     def optimize_image(self, rootdir):
 545         """
 546         Filing up the image with zeros will increase its compression rate
 547         """
 548         zeros = os.path.join(rootdir, 'ZEROS')
 549         self.runcmd_unchecked(['dd', 'if=/dev/zero', 'of=' + zeros, 'bs=1M'])
 550         self.runcmd(['rm', '-f', zeros])
 551
 552     def squash(self):
 553         """
 554         Run squashfs on the image.
 555         """
 556         if not os.path.exists('/usr/bin/mksquashfs'):
 557             logging.warning("Squash selected but mksquashfs not found!")
 558             return
 559         self.message("Running mksquashfs")
 560         suffixed = "%s.squashfs" % self.settings['image']
 561         self.runcmd(['mksquashfs', self.settings['image'],
 562                      suffixed,
 563                      '-no-progress', '-comp', 'xz'], ignore_fail=False)
 564         os.unlink(self.settings['image'])
 565         self.settings['image'] = suffixed
 566
 567     def cleanup_system(self):
 568         # Clean up after any errors.
 569
 570         self.message('Cleaning up')
 571
 572         # Umount in the reverse mount order
 573         if self.settings['image']:
 574             for i in xrange(len(self.mount_points) - 1, -1, -1):
 575                 mount_point = self.mount_points[i]
 576                 try:
 577                     self.runcmd(['umount', mount_point], ignore_fail=False)
 578                 except cliapp.AppException:
 579                     logging.debug("umount failed, sleeping and trying again")
 580                     time.sleep(5)
 581                     self.runcmd(['umount', mount_point], ignore_fail=False)
 582
 583             self.runcmd(['kpartx', '-d', self.settings['image']], ignore_fail=True)
 584
 585         for dirname in self.remove_dirs:
 586             shutil.rmtree(dirname)
 587
 588     def customize(self, rootdir):
 589         script = self.settings['customize']
 590         if not script:
 591             return
 592         if not os.path.exists(script):
 593             example = os.path.join("/usr/share/vmdebootstrap/examples/", script)
 594             if not os.path.exists(example):
 595                 self.message("Unable to find %s" % script)
 596                 return
 597             script = example
 598         self.message('Running customize script %s' % script)
 599         with open('/dev/tty', 'w') as tty:
 600             cliapp.runcmd([script, rootdir], stdout=tty, stderr=tty)
 601
 602     def create_tarball(self, rootdir):
 603         # Create a tarball of the disk's contents
 604         # shell out to runcmd since it more easily handles rootdir
 605         self.message('Creating tarball of disk contents')
 606         self.runcmd(['tar', '-cf', self.settings['tarball'], '-C', rootdir, '.'])
 607
 608     def chown(self, rootdir):
 609         # Change image owner after completed build
 610         self.message("Changing owner to %s" % self.settings["owner"])
 611         subprocess.call(["chown",
 612                          self.settings["owner"],
 613                          self.settings["image"]])
 614
 615     def configure_apt(self, rootdir):
 616         # use the distribution and mirror to create an apt source
 617         self.message("Configuring apt to use distribution and mirror")
 618         conf = os.path.join(rootdir, 'etc', 'apt', 'sources.list.d', 'base.list')
 619         logging.debug('configure apt %s' % conf)
 620         f = open(conf, 'w')
 621         f.write('''
 622 deb %(mirror)s %(distribution)s main
 623 #deb-src %(mirror)s %(distribution)s main
 624 ''' % {
 625             'mirror': self.settings['mirror'],
 626             'distribution': self.settings['distribution']
 627         })
 628         f.close()
 629
 630 if __name__ == '__main__':
 631     VmDebootstrap(version=__version__).run()