iankelling.org Git - automated-distro-installer/blob - fai/config/hooks/partition.DEFAULT

   1 #!/bin/bash -x
   2 # Copyright (C) 2016 Ian Kelling
   3
   4 # This program is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU General Public License
   6 # as published by the Free Software Foundation; either version 2
   7 # of the License, or (at your option) any later version.
   8
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17
  18 set -eE -o pipefail
  19 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
  20
  21 # for calling outside of FAI, first
  22 # - source /a/bin/fai-wrapper
  23 # - set any appropriate classes with: fai-setclass OPT1... which sets CLASS_OPT1=true...
  24 #   or run eval-fai-classfile FILE
  25 #
  26 # OPTIONS:
  27 #
  28 # environment variables:
  29 #
  30 # HOSTNAME: if frodo, we exclude 2 devices from the /boot array, which
  31 # the bios does not see. if demohost, we set the luks password to just
  32 # 'x'.
  33 #
  34 # SPECIAL_DISK: For use outside of fai. A base disk name like
  35 # /dev/sdk. If set, we just cryptsetup and partition this one disk then
  36 # exit. This is useful for partitioning a disk in preparation to replace
  37 # a failed or failing disk from a raid10 array.
  38 #
  39 # classes:
  40 #
  41 # REPARTITION: forces repartitioning even if we detect the proper amount
  42 # of partitions already exist.
  43 #
  44 # ROTATIONAL: forces to install onto hdds instead of sdds. normally sdds
  45 # are chosen if they exist.
  46 #
  47 # PARTITION_PROMPT: command line prompt before partitioning
  48 #
  49 # RAID0: forces raid0 filesystem. Normally with 4+ devices, we use
  50 # raid10.
  51 # RAID1: forces raid1 filesystem.
  52
  53 if [[ $SPECIAL_DISK ]]; then
  54   export CLASS_REPARTITION=true
  55 fi
  56
  57 # # fai's setup-storage won't do btrfs on luks,
  58 # # so we do it ourself :)
  59 # inspiration taken from files in fai-setup-storage package
  60
  61 # if we are not running in fai, skiptask won't be defined, so carry on.
  62 skiptask partition || ! type skiptask
  63
  64 if ! type -p devbyid; then
  65   for d in $FAI/distro-install-common \
  66              /a/bin/fai/fai/config/distro-install-common $FAI $PWD; do
  67     [[ -d $d ]] || continue
  68     if [[ -e $d/devbyid ]]; then
  69       devbyid=$d/devbyid
  70       devbyid() { $devbyid "$@"; }
  71       break
  72     fi
  73   done
  74   if [[ ! $devbyid ]]; then
  75     echo "$0: error: failed to find devbyid script" >&2
  76     exit 1
  77   fi
  78 fi
  79
  80
  81
  82 #### begin configuration
  83
  84 rootn=1
  85 swapn=2
  86 bootn=3
  87 # ext partition so grub can write persistent variables,
  88 # so it can do a one time boot. grub can't write to
  89 # btrfs or any cow fs because it's more
  90 # more complicated to do and they don't want to.
  91 grub_extn=4
  92 # bios boot partition,
  93 # https://wiki.archlinux.org/index.php/GRUB
  94 bios_grubn=5
  95 lastn=$bios_grubn
  96
  97
  98
  99 ##### end configuration
 100
 101
 102 add-part() { # add partition suffix to $dev
 103   local d ret
 104   if [[ $# == 1 ]]; then
 105     d=$dev
 106     part=$1
 107   else
 108     d=$1
 109     part=$2
 110   fi
 111   if [[ $d == /dev/disk/by-id/* ]]; then
 112     ret=$d-part$part
 113   else
 114     ret=$d$part
 115   fi
 116   echo $ret
 117 }
 118
 119 bootdev() { add-part $@ $bootn; }
 120 rootdev() { add-part $@ $rootn; }
 121 swapdev() { add-part $@ $swapn; }
 122 grub_extdev() { add-part $@ $grub_extn; }
 123 bios_grubdev() { add-part $@ $bios_grubn; }
 124
 125 crypt-dev() { echo /dev/mapper/crypt_dev_${1##*/}; }
 126 crypt-name() { echo crypt_dev_${1##*/}; }
 127 root-cryptdev() { crypt-dev $(rootdev $@); }
 128 swap-cryptdev() { crypt-dev $(swapdev $@); }
 129 root-cryptname() { crypt-name $(rootdev $@); }
 130 swap-cryptname() { crypt-name $(swapdev $@); }
 131
 132 ##### end function defs
 133
 134 if ifclass REPARTITION;then
 135   partition=true # force a full wipe
 136 else
 137   partition=false # change to true to force a full wipe
 138 fi
 139
 140 ## ignore disks that are mounted, eg when running from fai-cd
 141 declare -A disk_excludes
 142 while read -r l; do
 143   eval "$l"
 144   if [[ ! $PKNAME ]]; then
 145     PKNAME="$KNAME"
 146   fi
 147   if [[ $MOUNTPOINT ]]; then
 148     disk_excludes[$PKNAME]=true
 149   fi
 150 done < <(lsblk -nP -o KNAME,MOUNTPOINT,PKNAME)
 151
 152
 153 hdds=()
 154 ssds=()
 155 cd /sys/block
 156 for disk in [sv]d[a-z]; do
 157   if [[ ${disk_excludes[$disk]} ]]; then
 158     continue
 159   fi
 160   case $(cat $disk/queue/rotational) in
 161     0) ssds+=(/dev/$disk) ;;
 162     1) hdds+=(/dev/$disk) ;;
 163     *) echo "$0: error: unknown /sys/block/$disk/queue/rotational: \
 164 $(cat $disk/queue/rotational)"; exit 1 ;;
 165   esac
 166 done
 167
 168 # install all ssds, or if there are none, all hdds.
 169 # Note, usb flash disks are seen as rotational, which is
 170 # very odd, but convenient for ignoring them here.
 171 # TODO: find a reliable way to ignore them.
 172 if ! ifclass ROTATIONAL && (( ${#ssds[@]} > 0 )); then
 173   short_devs=( ${ssds[@]} )
 174 else
 175   short_devs=( ${hdds[@]} )
 176 fi
 177
 178 # check if the partitions exist have the right filesystems
 179 #blkid="$(blkid -s TYPE)"
 180 for dev in ${short_devs[@]}; do
 181   if $partition; then break; fi
 182   y=$(readlink -f $dev)
 183   arr=($y[0-9])
 184   [[ ${#arr[@]}  == "$lastn" ]] || partition=true
 185   for (( i=1; i <= lastn; i++ )); do
 186     [[ -e ${dev}$i ]] || partition=true
 187   done
 188   # On one system, blkid is missing some partitions.
 189   # maybe we need a flag, like FUZZY_BLKID or something, so we
 190   # can check that at least some exist.
 191   # for x in "`rootdev`: TYPE=\"crypto_LUKS\"" "`bootdev`: TYPE=\"btrfs\""; do
 192   #     echo "$blkid" | grep -Fx "$x" &>/dev/null || partition=true
 193   # done
 194 done
 195
 196 if $partition && ifclass PARTITION_PROMPT; then
 197   echo "Press any key except ctrl-c to continue and partition these drives:"
 198   echo "  ${short_devs[*]}"
 199   read -r
 200 fi
 201
 202 devs=()
 203 shopt -s extglob
 204 for short_dev in ${short_devs[@]}; do
 205   devs+=($(devbyid $short_dev))
 206 done
 207 if [[ ! ${devs[0]} ]]; then
 208   echo "$0: error: failed to detect devs" >&2
 209   exit 1
 210 fi
 211
 212 boot_space=0
 213 first=false
 214 boot_devs=()
 215 for dev in ${devs[@]}; do
 216   if ifclass frodo; then
 217     # I ran into a machine where the bios doesn't know about some disks,
 218     # so 1st stage of grub also doesn't know about them.
 219     # Also, grub does not support mounting degraded btrfs as far as
 220     # I can tell with some googling.
 221     # From within an arch install env, I could detect them by noting
 222     # their partitions were mixed with the next disk in /dev/disk/by-path,
 223     # and I have mixed model disks, and I could see the 8 models which showed
 224     # up in the bios, and thus see which 2 models were missing.
 225     # hdparm -I /dev/sdh will give model info in linux.
 226     # However, in fai on jessie, /dev/disk/by-path dir doesn't exist,
 227     # and I don't see another way, so I'm hardcoding them.
 228     # We still put grub on them and partition them the same, for uniformity
 229     # and in case they get moved to a system that can recognize them,
 230     # we just exclude them from the boot filesystem.
 231     cd /dev/disk/by-id/
 232     bad_disk=false
 233     for id in ata-TOSHIBA_MD04ACA500_8539K4TQFS9A \
 234                 ata-TOSHIBA_MD04ACA500_Y5IFK6IJFS9A; do
 235       if [[ $(readlink -f $id) == "$(readlink -f $dev)" ]]; then
 236         bad_disk=true
 237         break
 238       fi
 239     done
 240     $bad_disk || boot_devs+=($(bootdev))
 241   else
 242     boot_space=$(( boot_space + $(parted -m $dev unit MiB print | \
 243                                     sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 244     boot_devs+=($(bootdev))
 245   fi
 246   if [[ $boot_devs && $first ]]; then
 247     first_grub_extdev=$(grub_extdev)
 248     first=false
 249   fi
 250 done
 251
 252 if ifclass RAID0 || (( ${#boot_devs[@]} == 1 )); then
 253   raid_level=0
 254 elif ifclass RAID1 || (( ${#boot_devs[@]} <= 3 )); then
 255   raid_level=1
 256 else
 257   raid_level=10
 258 fi
 259
 260 ### Begin calculate boot partition space
 261 # due to raid duplication
 262 case $raid_level in
 263   1*) boot_space=$(( boot_space / 2 )) ;;
 264 esac
 265 if (( boot_space > 60000 )); then
 266   # this is larger than needed for several /boot subvols,
 267   # becuase I keep a minimal debian install on it for
 268   # recovery needs and for doing pxe-kexec.
 269   boot_mib=10000
 270 elif (( boot_space > 30000 )); then
 271   boot_mib=$(( 5000 + (boot_space - 30000) / 2 ))
 272 else
 273   # Small vms don't have room for /boot recovery.  With 3 kernels
 274   # installed, i'm using 132M on t8, so this seems like plenty of
 275   # room. note: rhel 8 recomments 1g for /boot.
 276   boot_mib=500
 277   #
 278 fi
 279 case $raid_level in
 280   1*) boot_mib=$(( boot_mib * 2 )) ;;
 281 esac
 282 ### end calculate boot partition space
 283
 284
 285
 286 if [[ ! $DISTRO ]]; then
 287   if ifclass VOL_STRETCH_BOOTSTRAP; then
 288     DISTRO=debianstretch_bootstrap
 289   elif ifclass VOL_STRETCH; then
 290     DISTRO=debianstretch
 291   elif ifclass VOL_BUSTER; then
 292     DISTRO=debianbuster
 293   elif ifclass VOL_TESTING; then
 294     DISTRO=debiantesting
 295   elif ifclass VOL_XENIAL; then
 296     DISTRO=ubuntuxenial
 297   elif ifclass VOL_BELENOS; then
 298     DISTRO=trisquelbelenos
 299   elif ifclass VOL_FLIDAS; then
 300     DISTRO=trisquelflidas
 301   elif ifclass VOL_ETIONA; then
 302     DISTRO=trisqueletiona
 303   else
 304     echo "PARTITIONER ERROR: no distro class/var set" >&2
 305     exit 1
 306   fi
 307 fi
 308 first_boot_dev=${boot_devs[0]}
 309
 310
 311 bpart() { # btrfs a partition
 312   case $raid_level in
 313     0) mkfs.btrfs -f $@ ;;
 314     1) mkfs.btrfs -f -m raid1 -d raid1 $@ ;;
 315     10) mkfs.btrfs -f -m raid10 -d raid10 $@ ;;
 316   esac
 317 }
 318
 319
 320 # see README for docs about how to create these
 321 luks_dir=${LUKS_DIR:-/var/lib/fai/config/distro-install-common/luks}
 322
 323
 324 luks_file=$luks_dir/host-$HOSTNAME
 325 if [[ ! -e $luks_file ]]; then
 326   hostkeys=($luks_dir/host-*)
 327   # if there is only one key, we might be deploying somewhere
 328   # where dhcp doesnt give us a proper hostname, so use that.
 329   if [[ ${#hostkeys[@]} == 1 && -e ${hostkeys[0]} ]]; then
 330     luks_file=${hostkeys[0]}
 331   else
 332     echo "$0: error: no key for hostname at $luks_file" >&2
 333     exit 1
 334   fi
 335 fi
 336
 337 # # note, corresponding changes in /b/ds/keyscript-{on,off}
 338 if ifclass tpnew; then
 339   lukspw=$(cat $luks_dir/traci)
 340 elif ifclass ziva; then
 341   lukspw=$(cat $luks_dir/ziva)
 342 elif ifclass demohost; then
 343   lukspw=x
 344 elif [[ -e $luks_dir/$HOSTNAME ]]; then
 345   lukspw=$(cat $luks_dir/$HOSTNAME)
 346 else
 347   lukspw=$(cat $luks_dir/iank)
 348 fi
 349
 350
 351 first_root_crypt=$(root-cryptdev ${devs[0]})
 352
 353 # 1.5 x based on https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-partitioning-setup-x86.html#sect-custom-partitioning-x86
 354 swap_mib=$(( $(grep ^MemTotal: /proc/meminfo | \
 355                  awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1024 ))
 356
 357 mkdir -p /tmp/fai
 358 root_devs=()
 359 for dev in ${devs[@]}; do
 360   root_devs+=($(rootdev))
 361 done
 362 shopt -s nullglob
 363 if $partition; then
 364
 365   ### begin wipefs
 366   if [[ ! $SPECIAL_DISK ]]; then
 367     for dev in ${devs[@]}; do
 368       # if we repartition to the same as an old partition,
 369       # we don't want any old fses hanging around.
 370       for (( i=1; i <= lastn; i++ )); do
 371         x=$(add-part $dev $i)
 372         [[ -e $x ]] || continue
 373         count_down=10
 374         # wipefs has failed, manual run works, google suggests timing issue
 375         while ! wipefs -a $x; do
 376           sleep 2
 377           count_down=$((count_down - 1))
 378           (( count_down > 0 )) || exit 1
 379         done
 380       done
 381     done
 382   fi
 383   ### end wipefs
 384
 385   for dev in ${devs[@]}; do
 386     if [[ $SPECIAL_DISK ]]; then
 387       dev=$(devbyid $SPECIAL_DISK)
 388     fi
 389
 390     # parted will round up the disk size. Do -1 so we can have
 391     # fully 1MiB unit partitions for easy resizing of the last partition.
 392     # Otherwise we would pass in -0 for the end argument for the last partition.
 393     #
 394     # Note: parted print error output is expected. example:
 395     # Error: /dev/vda: unrecognised disk label
 396     disk_mib=$(( $(parted -m $dev unit MiB print | \
 397                      sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 398     root_end=$(( disk_mib - swap_mib - boot_mib /  ${#boot_devs[@]} ))
 399     swap_end=$(( root_end + swap_mib))
 400
 401     parted -s $dev mklabel gpt
 402     # MiB because parted complains about alignment otherwise.
 403     pcmd="parted -a optimal -s -- $dev"
 404     $pcmd mkpart primary ext3 12MiB ${root_end}MiB
 405     # without naming, systemd gives us misc errors like:
 406     # dev-disk-by\x2dpartlabel-primary.device: Dev dev-disk-by\x2dpartlabel-primary.device appeared twice
 407     $pcmd name $rootn root
 408     # normally a swap is type "linux-swap", but this is encrypted swap. using that
 409     # label will confuse systemd.
 410     $pcmd mkpart primary "" ${root_end}MiB ${swap_end}MiB
 411     $pcmd name $swapn swap
 412     $pcmd mkpart primary "" ${swap_end}MiB ${disk_mib}MiB
 413     $pcmd name $bootn boot
 414     # i only need a few k, but googling min size,
 415     # I found someone saying that gparted required
 416     # required at least 8 because of their hard drive cylinder size.
 417     # And 8 is still very tiny.
 418     $pcmd mkpart primary "ext2" 4MiB 12MiB
 419     $pcmd name $grub_extn grubext
 420     # gpt ubuntu cloud image uses ~4 mb for this partition. fai uses 1 MiB.
 421     # so, I use 3, whatever.
 422     # note: parted manual saying cheap flash media
 423     # should to start at 4.
 424     $pcmd mkpart primary "" 1MiB 4MiB
 425     $pcmd name $bios_grubn biosgrub
 426     $pcmd set $bios_grubn bios_grub on
 427     $pcmd set $bootn boot on # generally not needed on modern systems
 428     # the mkfs failed before on a vm, which prompted me to add
 429     # sleep .1
 430     # then it failed again on a physical machine
 431     # with:
 432     # Device /dev/disk/by-id/foo doesn't exist or access denied,
 433     # so I added a wait until it existed.
 434     # Then I added the mkfs.ext2, which claimed to succeed,
 435     # but then couldn't be found upon reboot. In that case we didn't
 436     # wait at all. So I've added a 3 second minimum wait.
 437     sleep 3
 438     secs=0
 439     while [[ ! -e $(rootdev) ]] && (( secs < 10 )); do
 440       sleep 1
 441       secs=$((secs +1))
 442     done
 443     # Holds just a single file, rarely written, so
 444     # use ext2, like was often used for the /boot partition.
 445     # This exists because grub can only persist data to a non-cow fs.
 446     # And we use persisting a var in grub to do a one time boot.
 447     # We could pass the data on the kernel command line and persist it
 448     # to grubenv after booting, but that relies on the boot always succeeding.
 449     # This is just a bit more robust, and it could work for booting
 450     # into ipxe which can't persist data, if we ever got that working.
 451     mkfs.ext2 $(grub_extdev)
 452     # when we move to newer than trisquel 8, we can remove
 453     # --type luks1. We can also check on cryptsetup --help | less /compil
 454     # to see about the other settings. Default in debian 9 is luks2.
 455     # You can convert from luks2 to luks 1 by adding a temporary key:
 456     # cryptsetup luksAddKey --pbkdf pbkdf2
 457     # then remove the new format keys with cryptsetup luksRemoveKey
 458     # then cryptsetup convert DEV --type luks1, then readd old keys and remove temp.
 459     yes YES | cryptsetup luksFormat $(rootdev) $luks_file \
 460                          --type luks1 -c aes-cbc-essiv:sha256 -s 256 || [[ $? == 141 ]]
 461     yes "$lukspw" | \
 462       cryptsetup luksAddKey --key-file $luks_file \
 463                  $(rootdev) || [[ $? == 141 ]]
 464     # background: Keyfile and password are treated just
 465     # like 2 ways to input a passphrase, so we don't actually need to have
 466     # different contents of keyfile and passphrase, but it makes some
 467     # security sense to a really big randomly generated passphrase
 468     # as much as possible, so we have both.
 469     #
 470     # This would remove the keyfile.
 471     #    yes 'test' | cryptsetup luksRemoveKey /dev/... \
 472       #                            /key/file || [[ $? == 141 ]]
 473
 474     cryptsetup luksOpen $(rootdev) $(root-cryptname) \
 475                --key-file $luks_file
 476
 477     if [[ $SPECIAL_DISK ]]; then
 478       exit 0
 479     fi
 480   done
 481   ls -la /dev/btrfs-control # this was probably for debugging...
 482   sleep 1
 483   bpart $(for dev in ${devs[@]}; do root-cryptdev; done)
 484   bpart ${boot_devs[@]}
 485 else
 486   for dev in ${devs[@]}; do
 487     mkfs.ext2 $(grub_extdev)
 488     cryptsetup luksOpen $(rootdev) $(root-cryptname) \
 489                --key-file $luks_file
 490   done
 491   sleep 1
 492 fi
 493
 494
 495 if [[ $DISTRO != debianstretch_bootstrap ]]; then
 496   # bootstrap distro doesn't use separate encrypted root.
 497   mount -o subvolid=0 $first_root_crypt /mnt
 498   # systemd creates subvolumes we want to delete.
 499   s=($(btrfs subvolume list --sort=-path /mnt |
 500          sed -rn "s#^.*path\s*(root_$DISTRO/\S+)\s*\$#\1#p"))
 501   for subvol in ${s[@]}; do btrfs subvolume delete /mnt/$subvol; done
 502   btrfs subvolume set-default 0 /mnt
 503   [[ ! -e /mnt/root_$DISTRO ]] || btrfs subvolume delete /mnt/root_$DISTRO
 504
 505   ## create subvols ##
 506   cd /mnt
 507
 508   btrfs subvolume create root_$DISTRO
 509
 510   mkdir -p /mnt/root_$DISTRO/boot
 511   # could set default subvol like this, but no reason to.
 512   # btrfs subvolume set-default \
 513     #       $(btrfs subvolume list . | grep "root_$DISTRO$" | awk '{print $2}') .
 514
 515   # no cow on the root filesystem. it's setup is fully scripted,
 516   # if it's messed up, we will just recreated it,
 517   # and we can get better perf with this.
 518   # I can't remember exactly why, but this is preferable to mounting with
 519   # -o nodatacow, I think because subvolumes inherit that.
 520   chattr -Rf +C root_$DISTRO
 521   cd /
 522   umount /mnt
 523 fi
 524
 525 mount -o subvolid=0 $first_boot_dev /mnt
 526 cd /mnt
 527 btrfs subvolume set-default 0 /mnt # already default, just ensuring it.
 528
 529 # for libreboot systems. grub2 only reads from subvolid=0
 530 mkdir -p /mnt/grub2
 531 cp $FAI/distro-install-common/libreboot_grub.cfg /mnt/grub2
 532
 533 if [[ $DISTRO == debianstretch_bootstrap ]]; then
 534   # this is just convenience for the libreboot_grub config
 535   # so we can glob the other ones easier.
 536   boot_vol=$DISTRO
 537 else
 538   boot_vol=boot_$DISTRO
 539 fi
 540 [[ ! -e /mnt/$boot_vol ]] || btrfs subvolume delete /mnt/$boot_vol
 541 btrfs subvolume create $boot_vol
 542 cd /
 543 umount /mnt
 544 ## end create subvols ##
 545
 546 dev=${boot_devs[0]}
 547 mount $first_grub_extdev /mnt
 548 grub-editenv /mnt/grubenv set did_fai_check=true
 549 grub-editenv /mnt/grubenv set last_boot=/$boot_vol
 550 umount /mnt
 551
 552 if [[ $DISTRO == debianstretch_bootstrap ]]; then
 553   cat > /tmp/fai/fstab <<EOF
 554 $first_boot_dev  /  btrfs  noatime,subvol=$boot_vol  0 0
 555 EOF
 556   cat >/tmp/fai/disk_var.sh <<EOF
 557 BOOT_DEVICE="${short_devs[@]}"
 558 ROOT_PARTITION=$first_boot_dev
 559 EOF
 560 else
 561   # note, fai creates the mountpoints listed here
 562   cat > /tmp/fai/fstab <<EOF
 563 $first_root_crypt  /  btrfs  noatime,subvol=root_$DISTRO  0 0
 564 $first_root_crypt  /mnt/root  btrfs  nofail,noatime,subvolid=0  0 0
 565 $first_boot_dev  /boot  btrfs  nofail,noatime,subvol=$boot_vol  0 0
 566 EOF
 567   swaps=()
 568   for dev in ${devs[@]}; do
 569     swaps+=($(swap-cryptname))
 570     cat >>/tmp/fai/crypttab <<EOF
 571 $(root-cryptname)  $(rootdev)  none  keyscript=decrypt_keyctl,discard,luks,initramfs
 572 $(swap-cryptname) $(swapdev)  /dev/urandom  swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
 573 EOF
 574     cat >> /tmp/fai/fstab <<EOF
 575 $(swap-cryptdev)  none  swap  nofail,sw  0 0
 576 EOF
 577   done
 578
 579   # fai would do this:
 580   #BOOT_DEVICE=\${BOOT_DEVICE:-"${devs[0]}"}
 581
 582   # note: swaplist seems to do nothing.
 583   cat >/tmp/fai/disk_var.sh <<EOF
 584 BOOT_DEVICE="${short_devs[@]}"
 585 BOOT_PARTITION=\${BOOT_PARTITION:-$first_boot_dev}
 586 # ROOT_PARTITIONS is added by me, used in arch setup.
 587 ROOT_PARTITIONS="${root_devs[@]}"
 588 ROOT_PARTITION=\${ROOT_PARTITION:-$first_root_crypt}
 589 SWAPLIST=\${SWAPLIST:-"${swaps[@]}"}
 590 EOF
 591 fi