vm_host

   1 #!/bin/sh
   2 set -e -f ${DRY_RUN:+-n} -u
   3 tool=${0%/*}
   4 . "$tool"/functions.sh
   5 . "$tool"/vm.sh
   6 test "$(hostname --fqdn)" = "$vm_host"
   7
   8 rule_help () {
   9         cat >&2 <<-EOF
  10                 DESCRIPTION: ce script regroupe des fonctions utilitaires
  11                              pour gérer la VM _depuis_ son hôte ;
  12                              il sert à la fois d'outil et de documentation.
  13                              Voir \`$tool/vm_hosted' pour les utilitaires côté VM hébergée.
  14                 SYNTAX: $0 \$RULE \${RULE}_SYNTAX
  15                 RULES:
  16                 $(sed -ne 's/^rule_\([^_][^ ]*\) () {\( *#.*\|\)/\t\1\2/p' "$tool"/vm.sh "$0")
  17                 ENVIRONMENT:
  18                   TRACE # affiche les commandes avant leur exécution
  19                 $(sed -ne 's/^readonly \([^ ][^ =]*\).*}\( *#.*\|\)$/\t$\1\2/p' "$tool"/vm.sh "$0")
  20                 EOF
  21  }
  22
  23 readonly vm_dev_disk=/dev/mapper/domU-$(printf %s "$vm_fqdn-disk" | sed -e 's/-/--/g')
  24 readonly vm_dev_disk_boot="${vm_dev_disk}1"
  25
  26 rule_git_reset () {
  27         (
  28         cd "$tool"
  29         #git checkout -f -B master origin
  30         # NOTE: pas de -B sous squeeze
  31         git checkout HEAD'^' &&
  32         git branch -f master origin &&
  33         git checkout master
  34         git clean -f -d -x
  35         )
  36  }
  37
  38 rule_vm_init () {
  39         mk_reg mod=644 own=root:root /etc/xen/$vm_fqdn.cfg <<-EOF
  40                 #  -*- mode: python; -*-
  41                 # DOC: http://wiki.xen.org/wiki/Xen_Linux_PV_on_HVM_drivers
  42                 import os, re
  43                 name         = "$vm_fqdn"
  44                 arch         = os.uname()[4]
  45                 memory       = 2048
  46                 vcpus        = 1
  47                 pae          = 1
  48                 acpi         = 1
  49                 apic         = 1
  50                 vif          = ['mac=$vm_mac,bridge=$vm_bridge']
  51                 disk         = ['phy:/dev/domU/$vm_fqdn-disk,hda,w']
  52                 device_model = 'qemu-dm'
  53                 # HVM :
  54                 #kernel       = "/usr/lib/xen-4.0/boot/hvmloader"
  55                 #builder      = 'hvm'
  56                 #xen_platform_pci = 1 # NOTE: the guest VM can use optimized PV on HVM drivers
  57                 # PV :
  58                 #kernel       = "pv-grub.gz" # NOTE: pas encore dans Debian car il ne fonctionne qu'avec grub-legacy
  59                 #extra        = "(hd0,0)/grub/grub.cfg"
  60                 bootloader    = '/usr/bin/pygrub'
  61
  62                 # boot on floppy (a), hard disk (c) or CD-ROM (d)
  63                 #boot         = 'd'
  64
  65                 #vnc        = 1
  66                 #sdl        = 0
  67                 #vncconsole = 0
  68                 #vnclisten  = "0.0.0.0"
  69                 #vncpasswd  = ""
  70                 #usbdevice  = 'tablet'
  71
  72                 keymap      = 'fr'
  73                 serial      = 'pty'
  74                 on_poweroff = 'destroy'
  75                 on_reboot   = 'restart'
  76                 on_crash    = 'restart'
  77                 EOF
  78  }
  79 rule_vm_start () {
  80         test ! -e /dev/domU/$vm_fqdn-disk1
  81         sudo xm create $vm_fqdn.cfg
  82         rule_vm_attach
  83  }
  84 rule_vm_attach () {
  85         cat <<-EOF
  86                 NOTE: Ctrl-] pour se détacher de la console
  87                 EOF
  88         sudo xm console $vm_fqdn
  89  }
  90 rule_vm_stop () {
  91         sudo xm shutdown $vm_fqdn
  92  }
  93 rule_vm_stop_force () {
  94         sudo xm destroy $vm_fqdn
  95  }
  96
  97 rule_disk_mount () { # DESCRIPTION: montage du disque de la VM depuis l'hôte
  98         sudo kpartx -a -v /dev/domU/$vm_fqdn-disk
  99         #sudo xm block-attach 0 phy:/dev/domU/$vm_fqdn-disk $vm_dev_disk w
 100  }
 101 rule_disk_umount () { # DESCRIPTION: démontage du disque de la VM depuis l'hôte
 102         rule_part_boot_umount
 103         case $vm_use_lvm in
 104          (yes)
 105                 rule_part_lvm_umount
 106                 ;;
 107          (no)
 108                 rule_part_root_umount
 109                 rule_part_var_umount
 110                 rule_part_home_umount
 111                 ;;
 112          (*) exit 1;;
 113          esac
 114         sudo kpartx -d -v /dev/domU/$vm_fqdn-disk
 115         #sudo xm block-detach 0 $vm_dev_disk
 116         # XXX: DANGEREUX ; si jamais il bloque parce que le disque était encore utilisé :
 117         #      utiliser xm block-detach 0 $vm_dev_disk --force ;
 118         #      ôter les éventuels mappages LVM concernés avec dmsetup table et dmsetup remove --force ;
 119         #      ôter les mappages concernés dans /etc/lvm/cache/.cache,
 120         #      et pour bien trouver tous les mappages :
 121         #        % sudo find /dev -type l -exec sh -c 'printf "%s -> " "$@"; readlink "$@"' - {} \; | grep $vm_dev_disk
 122         #      enfin, ôter l'éventuel verrou dans /var/lock/lvm/
 123  }
 124
 125 case $vm_use_lvm in
 126  (no)
 127         readonly vm_dev_disk_swap="${vm_dev_disk}5"
 128         readonly vm_dev_disk_root="${vm_dev_disk}6"
 129         readonly vm_dev_disk_var="${vm_dev_disk}7"
 130         readonly vm_dev_disk_home="${vm_dev_disk}8"
 131         ;;
 132  (yes)
 133         readonly vm_lvm_pv="${vm_dev_disk}2"
 134         readonly vm_dev_disk_swap=/dev/$vm_lvm_vg/${vm_lvm_lv}_swap
 135         readonly vm_dev_disk_root=/dev/$vm_lvm_vg/${vm_lvm_lv}_root
 136         readonly vm_dev_disk_var=/dev/$vm_lvm_vg/${vm_lvm_lv}_var
 137         readonly vm_dev_disk_home=/dev/$vm_lvm_vg/${vm_lvm_lv}_home
 138         ;;
 139  (*) exit 1;;
 140  esac
 141
 142 rule_disk_format () { # DESCRIPTION: partitionnage du disque de la VM
 143         case $vm_use_lvm in
 144         (no)
 145                 sudo sfdisk $vm_dev_disk <<-EOF
 146                         # partition table of $vm_dev_disk
 147                         unit: sectors
 148
 149                         ${vm_dev_disk}1 : start=       63, size=   497952, Id=83, bootable
 150                         ${vm_dev_disk}2 : start=   498015, size=418927005, Id= 5
 151                         ${vm_dev_disk}3 : start=        0, size=        0, Id= 0
 152                         ${vm_dev_disk}4 : start=        0, size=        0, Id= 0
 153                         ${vm_dev_disk}5 : start=   498078, size=  1959867, Id=82
 154                         ${vm_dev_disk}6 : start=  2458008, size= 29302497, Id=83
 155                         ${vm_dev_disk}7 : start= 31760568, size=  9767457, Id=83
 156                         ${vm_dev_disk}8 : start= 41528088, size=377896932, Id=83
 157                 EOF
 158                 ;;
 159         (yes)
 160                 sudo sfdisk $vm_dev_disk <<-EOF
 161                         # partition table of $vm_dev_disk
 162                         unit: sectors
 163
 164                         ${vm_dev_disk}1 : start=       63, size=   497952, Id=83, bootable
 165                         ${vm_dev_disk}2 : start=   498015, size=418927005, Id=8E
 166                         EOF
 167                 ;;
 168         (*) exit 1;;
 169          esac
 170         #sudo partprobe $vm_dev_disk
 171         sudo kpartx -u -v /dev/domU/$vm_fqdn-disk
 172  }
 173
 174 rule_part_lvm_format () {
 175         rule_part_lvm_umount
 176         ! sudo vgs | grep -q "^  $vm_lvm_vg " ||
 177         sudo vgremove $vm_lvm_vg
 178         sudo pvcreate --dataalignment 512k $vm_lvm_pv
 179         sudo vgcreate --dataalignment 512k $vm_lvm_vg $vm_lvm_pv
 180         sudo lvcreate --contiguous y -n ${vm_lvm_lv}_swap -L  1G     $vm_lvm_vg
 181         sudo lvcreate --contiguous y -n ${vm_lvm_lv}_root -L 15G     $vm_lvm_vg
 182         sudo lvcreate --contiguous y -n ${vm_lvm_lv}_var  -L  5G     $vm_lvm_vg
 183         sudo lvcreate --contiguous y -n ${vm_lvm_lv}_home -l 99%FREE $vm_lvm_vg
 184         rule_part_lvm_umount
 185  }
 186 rule_part_lvm_mount () {
 187         case $vm_use_lvm in
 188          (yes)
 189                 sudo vgchange -a y $vm_lvm_vg
 190                 ;;
 191          (*) exit 1;;
 192          esac
 193  }
 194 rule_part_lvm_umount () {
 195         case $vm_use_lvm in
 196          (yes)
 197                 rule_part_root_umount
 198                 rule_part_var_umount
 199                 rule_part_home_umount
 200                 ! sudo vgs | grep -q "^  $vm_lvm_vg " ||
 201                 sudo vgchange -a n $vm_lvm_vg
 202                 ;;
 203          (*) exit 1;;
 204          esac
 205  }
 206
 207 rule_part_randomize () { # SYNTAX: $part # NOTE: à anticiper
 208         local part=$1
 209         eval "sudo dd if=/dev/urandom of=\$vm_dev_disk_$part"
 210  }
 211 rule_part_randomize_stat () { # SYNTAX: $part # DESCRIPTION: fait afficher la progression de rule_part_clean
 212         local part=$1
 213         eval "pkill -USR1 -f \"^dd if=/dev/urandom of=\$vm_dev_disk_$part\""
 214  }
 215 rule__part_encrypted_format () { # SYNTAX: $part # DESCRIPTION: formatage d'une partition distincte de /
 216  # NOTE: la clef de chiffrement est dérivée de celle de /,
 217  #       / doit être déchiffrée pour que cela fonctionne.
 218         local part=$1
 219         eval "local dev=\$vm_dev_disk_$part"
 220         test ! -e /dev/mapper/${vm_lvm_lv}_root_deciphered ||
 221         sudo /bin/sh -c "/lib/cryptsetup/scripts/decrypt_derived ${vm_lvm_lv}_root_deciphered |
 222         cryptsetup luksFormat --hash=sha512 --key-size=512 \
 223          --cipher=aes-xts-essiv:sha256 --key-file=- --align-payload=8 $dev"
 224  }
 225 rule__part_encrypted_mount () { # SYNTAX: $part
 226         local part=$1
 227         eval "local dev=\$vm_dev_disk_$part"
 228         test -e /dev/mapper/${vm_lvm_lv}_${part}_deciphered ||
 229         sudo /bin/sh -c "/lib/cryptsetup/scripts/decrypt_derived ${vm_lvm_lv}_root_deciphered |
 230         cryptsetup luksOpen --key-file=- $dev ${vm_lvm_lv}_${part}_deciphered"
 231  }
 232 rule__part_encrypted_umount () { # SYNTAX: $part
 233         local part=$1
 234         eval "local dev=\$vm_dev_disk_$part"
 235         test ! -e     /dev/mapper/${vm_lvm_lv}_${part}_deciphered ||
 236         sudo cryptsetup luksClose ${vm_lvm_lv}_${part}_deciphered
 237  }
 238
 239 rule_part_root_format () {
 240         if ! mount | grep -q "^$vm_dev_disk_root "
 241          then
 242                 sudo cryptsetup luksFormat --hash=sha512 --key-size=512 \
 243                  --cipher=aes-xts-essiv:sha256 --key-file=- --align-payload=8 $vm_dev_disk_root
 244                 sudo cryptsetup luksOpen --key-file=- $vm_dev_disk_root ${vm_lvm_lv}_root_deciphered
 245                 sudo mke2fs -t ext4 -c -c -m 5 -T ext4 -b $vm_e2fs_block_size \
 246                  -E resize=30G${vm_e2fs_extended_options} \
 247                  -L ${vm_lvm_lv}_root \
 248                  /dev/mapper/${vm_lvm_lv}_root_deciphered
 249                 ! mountpoint -q /mnt/$vm_fqdn
 250                 sudo mount -v /dev/mapper/${vm_lvm_lv}_root_deciphered /mnt/$vm_fqdn
 251                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/boot
 252                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/dev
 253                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/home
 254                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/proc
 255                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/sys
 256                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/var
 257                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/root
 258                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/root/tool
 259                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/root/tool/ateliers
 260                 sudo umount -v /mnt/$vm_fqdn
 261                 sudo cryptsetup luksClose ${vm_lvm_lv}_root_deciphered
 262          fi
 263  }
 264 rule_part_root_mount () {
 265         test -e /dev/mapper/${vm_lvm_lv}_root_deciphered ||
 266         sudo cryptsetup luksOpen $vm_dev_disk_root ${vm_lvm_lv}_root_deciphered
 267         mountpoint -q /mnt/$vm_fqdn ||
 268         sudo mount -v -t ext4 /dev/mapper/${vm_lvm_lv}_root_deciphered /mnt/$vm_fqdn
 269  }
 270 rule_part_root_umount () {
 271         ! mountpoint -q /mnt/$vm_fqdn ||
 272         sudo umount -v  /mnt/$vm_fqdn
 273         ! test -e     /dev/mapper/${vm_lvm_lv}_root_deciphered ||
 274         sudo cryptsetup luksClose ${vm_lvm_lv}_root_deciphered
 275  }
 276 rule_part_root_backup_luks () {
 277         sudo cryptsetup luksHeaderBackup $vm_dev_disk_root --header-backup-file ./root.luks
 278  }
 279 rule_part_swap_format () {
 280         rule__part_encrypted_format swap
 281         rule__part_encrypted_mount  swap
 282         sudo mkswap -f -L ${vm_lvm_lv}_swap \
 283          /dev/mapper/${vm_lvm_lv}_swap_deciphered
 284         rule__part_encrypted_umount swap
 285  }
 286 rule_part_boot_format () {
 287         mount | grep -q "^$vm_dev_disk_boot " ||
 288         sudo mke2fs -t ext2 -c -c -m 5 -T small \
 289          -E resize=1G${vm_e2fs_extended_options} \
 290          -L ${vm_lvm_lv}_boot $vm_dev_disk_boot
 291  }
 292 rule_part_boot_mount () {
 293         mountpoint -q /mnt/$vm_fqdn
 294         test -d /mnt/$vm_fqdn/boot
 295         mountpoint -q                           /mnt/$vm_fqdn/boot ||
 296         sudo mount -v -t ext2 $vm_dev_disk_boot /mnt/$vm_fqdn/boot
 297  }
 298 rule_part_boot_umount () {
 299         ! mountpoint -q /mnt/$vm_fqdn/boot ||
 300         sudo umount -v  /mnt/$vm_fqdn/boot
 301  }
 302 rule_part_var_format () {
 303         rule__part_encrypted_format var
 304         rule__part_encrypted_mount  var
 305         sudo mke2fs -t ext4 -c -c -m 5 -T ext4 -b $vm_e2fs_block_size \
 306          -E resize=10G${vm_e2fs_extended_options} \
 307          -L ${vm_lvm_lv}_var \
 308          /dev/mapper/${vm_lvm_lv}_var_deciphered
 309         rule__part_encrypted_umount var
 310  }
 311 rule_part_var_mount () {
 312         rule__part_encrypted_mount var
 313         mountpoint -q /mnt/$vm_fqdn/var ||
 314         sudo mount -v -t ext4 /dev/mapper/${vm_lvm_lv}_var_deciphered /mnt/$vm_fqdn/var
 315  }
 316 rule_part_var_umount () {
 317         ! mountpoint -q /mnt/$vm_fqdn/var ||
 318         sudo umount -v  /mnt/$vm_fqdn/var
 319         rule__part_encrypted_umount var
 320  }
 321 rule_part_home_format () {
 322         rule__part_encrypted_format home
 323         rule__part_encrypted_mount  home
 324         sudo mke2fs -t ext4 -c -c -m 0 -T ext4 -b $vm_e2fs_block_size \
 325          -E resize=400G${vm_e2fs_extended_options} \
 326          -L ${vm_lvm_lv}_home \
 327          /dev/mapper/${vm_lvm_lv}_home_deciphered
 328          # NOTE: -O quota pas supporté par e2fsprogs/squeeze
 329         rule__part_encrypted_umount home
 330  }
 331 rule_part_home_mount () {
 332         rule__part_encrypted_mount home
 333         mountpoint -q /mnt/$vm_fqdn/home ||
 334         sudo mount -v -t ext4 /dev/mapper/${vm_lvm_lv}_home_deciphered /mnt/$vm_fqdn/home
 335  }
 336 rule_part_home_umount () {
 337         ! mountpoint -q /mnt/$vm_fqdn/home ||
 338         sudo umount -v  /mnt/$vm_fqdn/home
 339         rule__part_encrypted_umount home
 340  }
 341
 342 rule_debian_install () {
 343         rule_disk_mount
 344         rule_part_lvm_mount
 345         rule_part_root_mount
 346         rule_part_boot_mount
 347         rule_part_var_mount
 348         sudo DEBOOTSTRAP_DIR=/usr/share/debootstrap/ LANG=C LC_CTYPE=C debootstrap \
 349          --arch=$vm_arch --verbose --keyring=/usr/share/keyrings/debian-archive-keyring.gpg \
 350          --exclude=vim-tiny \
 351          --include=$(printf '%s,' \
 352                  acl \
 353                  bsdmainutils \
 354                  busybox \
 355                  ca-certificates \
 356                  console-setup \
 357                  cryptsetup \
 358                  dash \
 359                  dnsutils \
 360                  dropbear \
 361                  etckeeper \
 362                  gnupg \
 363                  hashalot \
 364                  htop \
 365                  ifupdown \
 366                  initramfs-tools \
 367                  kbd \
 368                  less \
 369                  locales \
 370                  lvm2 \
 371                  mosh \
 372                  molly-guard \
 373                  ncurses-term \
 374                  openssh-client \
 375                  openssh-server \
 376                  openssl \
 377                  pciutils \
 378                  procps \
 379                  quota \
 380                  quotatool \
 381                  rsync \
 382                  screen \
 383                  sudo \
 384                  sysprofile \
 385                  vim-nox \
 386                  wget \
 387                  zsh \
 388          ) \
 389          $vm_lsb_name /mnt/$vm_fqdn/ \
 390          http://ftp.fr.debian.org/debian/
 391         rule_part_var_umount
 392         rule_part_boot_umount
 393         rule_part_root_umount
 394  }
 395
 396 rule_chroot () {
 397         rule_disk_mount
 398         rule_part_lvm_mount
 399         rule_part_root_mount
 400         rule_part_boot_mount
 401         rule_part_var_mount
 402         #rule_part_home_mount
 403         mountpoint -q /mnt/$vm_fqdn/proc ||
 404         sudo mount -t proc proc /mnt/$vm_fqdn/proc
 405         mountpoint -q /mnt/$vm_fqdn/sys ||
 406         sudo mount -t sysfs sys /mnt/$vm_fqdn/sys
 407         mountpoint -q /mnt/$vm_fqdn/dev ||
 408         sudo mount --bind /dev /mnt/$vm_fqdn/dev
 409         if test -d /mnt/$vm_fqdn/root/tool/vm/.git
 410          then
 411                 mountpoint -q /mnt/$vm_fqdn/root/tool/vm ||
 412                 sudo mount --bind "$tool" /mnt/$vm_fqdn/root/tool/vm
 413          else
 414                 rsync -a "$tool"/ /mnt/$vm_fqdn/root/tool/vm
 415          fi
 416         sudo chroot /mnt/$vm_fqdn /bin/bash || true
 417         rule__chroot_clean
 418  }
 419 rule__chroot_clean () {
 420         ! sudo mountpoint -q /mnt/$vm_fqdn/root/tool/vm ||
 421         sudo umount -v /mnt/$vm_fqdn/root/tool/$vm
 422         ! mountpoint -q /mnt/$vm_fqdn/dev ||
 423         sudo umount -v /mnt/$vm_fqdn/dev
 424         ! mountpoint -q /mnt/$vm_fqdn/sys ||
 425         sudo umount -v /mnt/$vm_fqdn/sys
 426         ! mountpoint -q /mnt/$vm_fqdn/proc ||
 427         sudo umount -v /mnt/$vm_fqdn/proc
 428         rule_part_home_umount
 429         rule_part_var_umount
 430         rule_part_boot_umount
 431         rule_part_root_umount
 432         rule_disk_umount
 433  }
 434
 435 rule=${1:-help}
 436 ${1+shift}
 437 set "${TRACE:+-x}"
 438 rule_$rule "$@"