vm_host

   1 #!/bin/sh
   2 set -e -f ${DRY_RUN:+-n} -u
   3 tool=${0%/*}
   4 . "$tool"/lib/functions.sh
   5 . "$tool"/etc/vm.sh
   6
   7 rule_help () { # SYNTAX: [--hidden]
   8         local hidden; [ ${1:+set} ] || hidden=set
   9         cat >&2 <<-EOF
  10                 DESCRIPTION:
  11                   ce script regroupe des règles pour administrer la VM ($vm_fqdn)
  12                   _depuis_ son hôte ($vm_host) ;
  13                   il sert à la fois d'outil et de documentation.
  14                   Voir \`$tool/vm_hosted' pour les règles côté VM hébergée.
  15                 SYNTAX: $0 \$RULE \${RULE}_SYNTAX
  16                 RULES:
  17                 $(sed -ne "s/^rule_\(${hidden:+[^_]}[^ ]*\) () {\( *#.*\|\)/  \1\2/p" "$tool"/etc/vm.sh "$0")
  18                 ENVIRONMENT:
  19                   TRACE # affiche les commandes avant leur exécution
  20                 $(sed -ne 's/^readonly \([^ ][^ =]*\).*}\( *#.*\|\)$/\t$\1\2/p' "$tool"/etc/vm.sh "$0")
  21                 EOF
  22  }
  23
  24 readonly vm_dev_disk=/dev/mapper/domU-$(printf %s "$vm_fqdn-disk" | sed -e 's/-/--/g')
  25 readonly vm_dev_disk_boot="${vm_dev_disk}1"
  26
  27 rule_git_config () {
  28         (
  29         cd "$tool"
  30         git config --replace branch.master.remote .
  31         git config --replace branch.master.merge refs/remotes/master
  32         )
  33  }
  34 rule_git_reset () {
  35         (
  36         cd "$tool"
  37         #git checkout -f -B master origin
  38         # NOTE: pas de -B sous squeeze
  39         git checkout HEAD'^' &&
  40         git branch -f master origin &&
  41         git checkout master
  42         git clean -f -d -x
  43         )
  44  }
  45
  46 rule_vm_init () {
  47         mk_reg mod=644 own=root:root /etc/xen/$vm_fqdn.cfg <<-EOF
  48                 #  -*- mode: python; -*-
  49                 # DOC: http://wiki.xen.org/wiki/Xen_Linux_PV_on_HVM_drivers
  50                 import os, re
  51                 name         = "$vm_fqdn"
  52                 arch         = os.uname()[4]
  53                 memory       = 2048
  54                 vcpus        = 1
  55                 pae          = 1
  56                 acpi         = 1
  57                 apic         = 1
  58                 vif          = ['mac=$vm_mac,bridge=$vm_bridge']
  59                 disk         = ['phy:/dev/domU/$vm_fqdn-disk,hda,w']
  60                 device_model = 'qemu-dm'
  61                 # HVM :
  62                 #kernel       = "/usr/lib/xen-4.0/boot/hvmloader"
  63                 #builder      = 'hvm'
  64                 #xen_platform_pci = 1 # NOTE: the guest VM can use optimized PV on HVM drivers
  65                 # PV :
  66                 #kernel       = "pv-grub.gz" # NOTE: pas encore dans Debian car il ne fonctionne qu'avec grub-legacy
  67                 #extra        = "(hd0,0)/grub/grub.cfg"
  68                 bootloader    = '/usr/bin/pygrub'
  69
  70                 # boot on floppy (a), hard disk (c) or CD-ROM (d)
  71                 #boot         = 'd'
  72
  73                 #vnc        = 1
  74                 #sdl        = 0
  75                 #vncconsole = 0
  76                 #vnclisten  = "0.0.0.0"
  77                 #vncpasswd  = ""
  78                 #usbdevice  = 'tablet'
  79
  80                 keymap      = 'fr'
  81                 serial      = 'pty'
  82                 on_poweroff = 'destroy'
  83                 on_reboot   = 'restart'
  84                 on_crash    = 'restart'
  85                 EOF
  86  }
  87 rule_vm_start () {
  88         test ! -e /dev/domU/$vm_fqdn-disk1
  89         sudo xm create $vm_fqdn.cfg
  90         rule vm_attach
  91  }
  92 rule_vm_attach () {
  93         cat <<-EOF
  94                 NOTE: Ctrl-] pour se détacher de la console
  95                 EOF
  96         sudo xm console $vm_fqdn
  97  }
  98 rule_vm_stop () {
  99         sudo xm shutdown $vm_fqdn
 100  }
 101 rule_vm_stop_force () {
 102         sudo xm destroy $vm_fqdn
 103  }
 104
 105 rule_disk_mount () { # DESCRIPTION: montage du disque de la VM depuis l'hôte
 106         sudo kpartx -a -v /dev/domU/$vm_fqdn-disk
 107         #sudo xm block-attach 0 phy:/dev/domU/$vm_fqdn-disk $vm_dev_disk w
 108  }
 109 rule_disk_umount () { # DESCRIPTION: démontage du disque de la VM depuis l'hôte
 110         rule part_boot_umount
 111         case $vm_use_lvm in
 112          (yes)
 113                 rule part_lvm_umount
 114                 ;;
 115          (no)
 116                 rule part_root_umount
 117                 rule part_var_umount
 118                 rule part_home_umount
 119                 ;;
 120          (*) exit 1;;
 121          esac
 122         sudo kpartx -d -v /dev/domU/$vm_fqdn-disk
 123         #sudo xm block-detach 0 $vm_dev_disk
 124         # XXX: DANGEREUX ; si jamais il bloque parce que le disque était encore utilisé :
 125         #      utiliser xm block-detach 0 $vm_dev_disk --force ;
 126         #      ôter les éventuels mappages LVM concernés avec dmsetup table et dmsetup remove --force ;
 127         #      ôter les mappages concernés dans /etc/lvm/cache/.cache,
 128         #      et pour bien trouver tous les mappages :
 129         #        % sudo find /dev -type l -exec sh -c 'printf "%s -> " "$@"; readlink "$@"' - {} \; | grep $vm_dev_disk
 130         #      enfin, ôter l'éventuel verrou dans /var/lock/lvm/
 131  }
 132
 133 case $vm_use_lvm in
 134  (no)
 135         readonly vm_dev_disk_swap="${vm_dev_disk}5"
 136         readonly vm_dev_disk_root="${vm_dev_disk}6"
 137         readonly vm_dev_disk_var="${vm_dev_disk}7"
 138         readonly vm_dev_disk_home="${vm_dev_disk}8"
 139         ;;
 140  (yes)
 141         readonly vm_lvm_pv="${vm_dev_disk}2"
 142         readonly vm_dev_disk_swap=/dev/$vm_lvm_vg/${vm_lvm_lv}_swap
 143         readonly vm_dev_disk_root=/dev/$vm_lvm_vg/${vm_lvm_lv}_root
 144         readonly vm_dev_disk_var=/dev/$vm_lvm_vg/${vm_lvm_lv}_var
 145         readonly vm_dev_disk_home=/dev/$vm_lvm_vg/${vm_lvm_lv}_home
 146         ;;
 147  (*) exit 1;;
 148  esac
 149
 150 rule_disk_format () { # DESCRIPTION: partitionnage du disque de la VM
 151         case $vm_use_lvm in
 152         (no)
 153                 sudo sfdisk $vm_dev_disk <<-EOF
 154                         # partition table of $vm_dev_disk
 155                         unit: sectors
 156
 157                         ${vm_dev_disk}1 : start=       63, size=   497952, Id=83, bootable
 158                         ${vm_dev_disk}2 : start=   498015, size=418927005, Id= 5
 159                         ${vm_dev_disk}3 : start=        0, size=        0, Id= 0
 160                         ${vm_dev_disk}4 : start=        0, size=        0, Id= 0
 161                         ${vm_dev_disk}5 : start=   498078, size=  1959867, Id=82
 162                         ${vm_dev_disk}6 : start=  2458008, size= 29302497, Id=83
 163                         ${vm_dev_disk}7 : start= 31760568, size=  9767457, Id=83
 164                         ${vm_dev_disk}8 : start= 41528088, size=377896932, Id=83
 165                 EOF
 166                 ;;
 167         (yes)
 168                 sudo sfdisk $vm_dev_disk <<-EOF
 169                         # partition table of $vm_dev_disk
 170                         unit: sectors
 171
 172                         ${vm_dev_disk}1 : start=       63, size=   497952, Id=83, bootable
 173                         ${vm_dev_disk}2 : start=   498015, size=418927005, Id=8E
 174                         EOF
 175                 ;;
 176         (*) exit 1;;
 177          esac
 178         #sudo partprobe $vm_dev_disk
 179         sudo kpartx -u -v /dev/domU/$vm_fqdn-disk
 180  }
 181
 182 rule_part_lvm_format () {
 183         rule part_lvm_umount
 184         ! sudo vgs | grep -q "^  $vm_lvm_vg " ||
 185         sudo vgremove $vm_lvm_vg
 186         sudo pvcreate --dataalignment 512k $vm_lvm_pv
 187         sudo vgcreate --dataalignment 512k $vm_lvm_vg $vm_lvm_pv
 188         sudo lvcreate --contiguous y -n ${vm_lvm_lv}_swap -L  1G     $vm_lvm_vg
 189         sudo lvcreate --contiguous y -n ${vm_lvm_lv}_root -L 15G     $vm_lvm_vg
 190         sudo lvcreate --contiguous y -n ${vm_lvm_lv}_var  -L  5G     $vm_lvm_vg
 191         sudo lvcreate --contiguous y -n ${vm_lvm_lv}_home -l 99%FREE $vm_lvm_vg
 192         rule part_lvm_umount
 193  }
 194 rule_part_lvm_mount () {
 195         case $vm_use_lvm in
 196          (yes)
 197                 sudo vgchange -a y $vm_lvm_vg
 198                 ;;
 199          (*) exit 1;;
 200          esac
 201  }
 202 rule_part_lvm_umount () {
 203         case $vm_use_lvm in
 204          (yes)
 205                 rule part_root_umount
 206                 rule part_var_umount
 207                 rule part_home_umount
 208                 ! sudo vgs | grep -q "^  $vm_lvm_vg " ||
 209                 sudo vgchange -a n $vm_lvm_vg
 210                 ;;
 211          (*) exit 1;;
 212          esac
 213  }
 214
 215 rule_part_randomize () { # SYNTAX: $part # NOTE: à anticiper
 216         local part=$1
 217         eval "sudo dd if=/dev/urandom of=\$vm_dev_disk_$part"
 218  }
 219 rule_part_randomize_stat () { # SYNTAX: $part # DESCRIPTION: fait afficher la progression de rule_part_randomize
 220         local part=$1
 221         eval "pkill -USR1 -f \"^dd if=/dev/urandom of=\$vm_dev_disk_$part\""
 222  }
 223 rule__part_encrypted_format () { # SYNTAX: $part # DESCRIPTION: formatage d'une partition distincte de /
 224  # NOTE: la clef de chiffrement est dérivée de celle de /,
 225  #       / doit être déchiffrée pour que cela fonctionne.
 226         local part=$1
 227         eval "local dev=\$vm_dev_disk_$part"
 228         test ! -e /dev/mapper/${vm_lvm_lv}_root_deciphered ||
 229         sudo /bin/sh -c "/lib/cryptsetup/scripts/decrypt_derived ${vm_lvm_lv}_root_deciphered |
 230         cryptsetup luksFormat --hash=sha512 --key-size=512 \
 231          --cipher=aes-xts-essiv:sha256 --key-file=- --align-payload=8 $dev"
 232  }
 233 rule__part_encrypted_mount () { # SYNTAX: $part
 234         local part=$1
 235         eval "local dev=\$vm_dev_disk_$part"
 236         test -e /dev/mapper/${vm_lvm_lv}_${part}_deciphered ||
 237         sudo /bin/sh -c "/lib/cryptsetup/scripts/decrypt_derived ${vm_lvm_lv}_root_deciphered |
 238         cryptsetup luksOpen --key-file=- $dev ${vm_lvm_lv}_${part}_deciphered"
 239  }
 240 rule__part_encrypted_umount () { # SYNTAX: $part
 241         local part=$1
 242         eval "local dev=\$vm_dev_disk_$part"
 243         test ! -e     /dev/mapper/${vm_lvm_lv}_${part}_deciphered ||
 244         sudo cryptsetup luksClose ${vm_lvm_lv}_${part}_deciphered
 245  }
 246
 247 rule_part_root_format () {
 248         if ! mount | grep -q "^$vm_dev_disk_root "
 249          then
 250                 sudo cryptsetup luksFormat --hash=sha512 --key-size=512 \
 251                  --cipher=aes-xts-essiv:sha256 --key-file=- --align-payload=8 $vm_dev_disk_root
 252                 sudo cryptsetup luksOpen --key-file=- $vm_dev_disk_root ${vm_lvm_lv}_root_deciphered
 253                 sudo mke2fs -t ext4 -c -c -m 5 -T ext4 -b $vm_e2fs_block_size \
 254                  -E resize=30G${vm_e2fs_extended_options} \
 255                  -L ${vm_lvm_lv}_root \
 256                  /dev/mapper/${vm_lvm_lv}_root_deciphered
 257                 ! mountpoint -q /mnt/$vm_fqdn
 258                 sudo mount -v /dev/mapper/${vm_lvm_lv}_root_deciphered /mnt/$vm_fqdn
 259                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/boot
 260                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/dev
 261                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/home
 262                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/proc
 263                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/sys
 264                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/var
 265                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/root
 266                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/root/tool
 267                 mk_dir mod=0770 own=root:root /mnt/$vm_fqdn/root/tool/ateliers
 268                 sudo umount -v /mnt/$vm_fqdn
 269                 sudo cryptsetup luksClose ${vm_lvm_lv}_root_deciphered
 270          fi
 271  }
 272 rule_part_root_mount () {
 273         test -e /dev/mapper/${vm_lvm_lv}_root_deciphered ||
 274         sudo cryptsetup luksOpen $vm_dev_disk_root ${vm_lvm_lv}_root_deciphered
 275         mountpoint -q /mnt/$vm_fqdn ||
 276         sudo mount -v -t ext4 /dev/mapper/${vm_lvm_lv}_root_deciphered /mnt/$vm_fqdn
 277  }
 278 rule_part_root_umount () {
 279         ! mountpoint -q /mnt/$vm_fqdn ||
 280         sudo umount -v  /mnt/$vm_fqdn
 281         ! test -e     /dev/mapper/${vm_lvm_lv}_root_deciphered ||
 282         sudo cryptsetup luksClose ${vm_lvm_lv}_root_deciphered
 283  }
 284 rule_part_root_backup_luks () {
 285         sudo cryptsetup luksHeaderBackup $vm_dev_disk_root --header-backup-file ./root.luks
 286  }
 287 rule_part_swap_format () {
 288         rule _part_encrypted_format swap
 289         rule _part_encrypted_mount  swap
 290         sudo mkswap -f -L ${vm_lvm_lv}_swap \
 291          /dev/mapper/${vm_lvm_lv}_swap_deciphered
 292         rule _part_encrypted_umount swap
 293  }
 294 rule_part_boot_format () {
 295         mount | grep -q "^$vm_dev_disk_boot " ||
 296         sudo mke2fs -t ext2 -c -c -m 5 -T small \
 297          -E resize=1G${vm_e2fs_extended_options} \
 298          -L ${vm_lvm_lv}_boot $vm_dev_disk_boot
 299  }
 300 rule_part_boot_mount () {
 301         mountpoint -q /mnt/$vm_fqdn
 302         test -d /mnt/$vm_fqdn/boot
 303         mountpoint -q                           /mnt/$vm_fqdn/boot ||
 304         sudo mount -v -t ext2 $vm_dev_disk_boot /mnt/$vm_fqdn/boot
 305  }
 306 rule_part_boot_umount () {
 307         ! mountpoint -q /mnt/$vm_fqdn/boot ||
 308         sudo umount -v  /mnt/$vm_fqdn/boot
 309  }
 310 rule_part_var_format () {
 311         rule _part_encrypted_format var
 312         rule _part_encrypted_mount  var
 313         sudo mke2fs -t ext4 -c -c -m 5 -T ext4 -b $vm_e2fs_block_size \
 314          -E resize=10G${vm_e2fs_extended_options} \
 315          -L ${vm_lvm_lv}_var \
 316          /dev/mapper/${vm_lvm_lv}_var_deciphered
 317         rule _part_encrypted_umount var
 318  }
 319 rule_part_var_mount () {
 320         rule _part_encrypted_mount var
 321         mountpoint -q /mnt/$vm_fqdn/var ||
 322         sudo mount -v -t ext4 /dev/mapper/${vm_lvm_lv}_var_deciphered /mnt/$vm_fqdn/var
 323  }
 324 rule_part_var_umount () {
 325         ! mountpoint -q /mnt/$vm_fqdn/var ||
 326         sudo umount -v  /mnt/$vm_fqdn/var
 327         rule _part_encrypted_umount var
 328  }
 329 rule_part_home_format () {
 330         rule _part_encrypted_format home
 331         rule _part_encrypted_mount  home
 332         sudo mke2fs -t ext4 -c -c -m 0 -T ext4 -b $vm_e2fs_block_size \
 333          -E resize=400G${vm_e2fs_extended_options} \
 334          -L ${vm_lvm_lv}_home \
 335          /dev/mapper/${vm_lvm_lv}_home_deciphered
 336          # NOTE: -O quota pas supporté par e2fsprogs/squeeze
 337         rule _part_encrypted_umount home
 338  }
 339 rule_part_home_mount () {
 340         rule _part_encrypted_mount home
 341         mountpoint -q /mnt/$vm_fqdn/home ||
 342         sudo mount -v -t ext4 /dev/mapper/${vm_lvm_lv}_home_deciphered /mnt/$vm_fqdn/home
 343  }
 344 rule_part_home_umount () {
 345         ! mountpoint -q /mnt/$vm_fqdn/home ||
 346         sudo umount -v  /mnt/$vm_fqdn/home
 347         rule _part_encrypted_umount home
 348  }
 349
 350 rule_debian_install () {
 351         rule disk_mount
 352         rule part_lvm_mount
 353         rule part_root_mount
 354         rule part_boot_mount
 355         rule part_var_mount
 356         sudo DEBOOTSTRAP_DIR=/usr/share/debootstrap/ LANG=C LC_CTYPE=C debootstrap \
 357          --arch=$vm_arch --verbose --keyring=/usr/share/keyrings/debian-archive-keyring.gpg \
 358          --exclude=vim-tiny \
 359          --include=$(printf '%s,' \
 360                  acl \
 361                  bsdmainutils \
 362                  busybox \
 363                  ca-certificates \
 364                  console-setup \
 365                  cryptsetup \
 366                  dash \
 367                  dnsutils \
 368                  dropbear \
 369                  etckeeper \
 370                  git-core \
 371                  gnupg \
 372                  hashalot \
 373                  htop \
 374                  ifupdown \
 375                  initramfs-tools \
 376                  kbd \
 377                  less \
 378                  locales \
 379                  lvm2 \
 380                  mosh \
 381                  molly-guard \
 382                  ncurses-term \
 383                  openssh-client \
 384                  openssh-server \
 385                  openssl \
 386                  pciutils \
 387                  procps \
 388                  quota \
 389                  quotatool \
 390                  rsync \
 391                  screen \
 392                  sudo \
 393                  sysprofile \
 394                  vim-nox \
 395                  wget \
 396                  zsh \
 397          ) \
 398          $vm_lsb_name /mnt/$vm_fqdn/ \
 399          http://ftp.fr.debian.org/debian/
 400         rule part_var_umount
 401         rule part_boot_umount
 402         rule part_root_umount
 403  }
 404
 405 rule_chroot () {
 406         rule disk_mount
 407         rule part_lvm_mount
 408         rule part_root_mount
 409         rule part_boot_mount
 410         rule part_var_mount
 411         #rule_part_home_mount
 412         mountpoint -q /mnt/$vm_fqdn/proc ||
 413         sudo mount -t proc proc /mnt/$vm_fqdn/proc
 414         mountpoint -q /mnt/$vm_fqdn/sys ||
 415         sudo mount -t sysfs sys /mnt/$vm_fqdn/sys
 416         mountpoint -q /mnt/$vm_fqdn/dev ||
 417         sudo mount --bind /dev /mnt/$vm_fqdn/dev
 418         if test -d /mnt/$vm_fqdn/root/tool/vm/.git
 419          then
 420                 mountpoint -q /mnt/$vm_fqdn/root/tool/vm ||
 421                 sudo mount --bind "$tool" /mnt/$vm_fqdn/root/tool/vm
 422          else
 423                 rsync -a "$tool"/ /mnt/$vm_fqdn/root/tool/vm
 424          fi
 425         sudo chroot /mnt/$vm_fqdn /bin/bash || true
 426         rule _chroot_clean
 427  }
 428 rule__chroot_clean () {
 429         ! sudo mountpoint -q /mnt/$vm_fqdn/root/tool/vm ||
 430         sudo umount -v /mnt/$vm_fqdn/root/tool/$vm
 431         ! mountpoint -q /mnt/$vm_fqdn/dev ||
 432         sudo umount -v /mnt/$vm_fqdn/dev
 433         ! mountpoint -q /mnt/$vm_fqdn/sys ||
 434         sudo umount -v /mnt/$vm_fqdn/sys
 435         ! mountpoint -q /mnt/$vm_fqdn/proc ||
 436         sudo umount -v /mnt/$vm_fqdn/proc
 437         rule part_home_umount
 438         rule part_var_umount
 439         rule part_boot_umount
 440         rule part_root_umount
 441         rule disk_umount
 442  }
 443
 444 rule=${1:-help}
 445 ${1+shift}
 446 case $rule in
 447  (help);;
 448  (*)
 449         assert 'test "$(hostname --fqdn)" = "$vm_host"' vm_host
 450         ${TRACE:+set -x}
 451         ;;
 452  esac
 453 rule $rule "$@"