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