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:
  22 # # need to redep and set that location so that we get luks keys
  23 # export FAI=/srv/fai/config
  24 # fai-redep
  25 # source /b/fai/fai-wrapper
  26 # - set any appropriate classes with: fai-setclass OPT1... which sets CLASS_OPT1=true...
  27 #   or run eval-fai-classfile FILE
  28 #
  29 # OPTIONS:
  30 #
  31 # environment variables:
  32 #
  33 # HOSTNAME: if frodo, we exclude 2 devices from the /boot array, which
  34 # the bios does not see. if demohost, we set the luks password to just
  35 # 'x'.
  36 #
  37 # SPECIAL_DISK: For use outside of fai. A base disk name like
  38 # /dev/sdk. If set, we just cryptsetup and partition this one disk then
  39 # exit. This is useful for partitioning a disk in preparation to replace
  40 # a failed or failing disk from a raid10 array.
  41 #
  42 # classes:
  43 #
  44 # REPARTITION: forces repartitioning even if we detect the proper amount
  45 # of partitions already exist.
  46 #
  47 # NOWIPE: use existing subvolumes if they exist
  48 #
  49 # ROTATIONAL: forces to install onto hdds instead of sdds. normally sdds
  50 # are chosen if they exist.
  51 #
  52 # PARTITION_PROMPT: command line prompt before partitioning
  53 #
  54 # RAID0: forces raid0 filesystem. Normally with 4+ devices, we use
  55 # raid10.
  56 # RAID1: forces raid1 filesystem.
  57
  58 if [[ $SPECIAL_DISK ]]; then
  59   export CLASS_REPARTITION=true
  60 fi
  61
  62 # # fai's setup-storage won't do btrfs on luks,
  63 # # so we do it ourself :)
  64 # inspiration taken from files in fai-setup-storage package
  65
  66 # if we are not running in fai, skiptask won't be defined, so carry on.
  67 skiptask partition || ! type skiptask
  68
  69 if ! type -p devbyid; then
  70   for d in $FAI/distro-install-common \
  71              /a/bin/fai/fai/config/distro-install-common $FAI $PWD; do
  72     [[ -d $d ]] || continue
  73     if [[ -e $d/devbyid ]]; then
  74       devbyid=$d/devbyid
  75       devbyid() { $devbyid "$@"; }
  76       break
  77     fi
  78   done
  79   if [[ ! $devbyid ]]; then
  80     echo "$0: error: failed to find devbyid script" >&2
  81     exit 1
  82   fi
  83 fi
  84
  85
  86
  87 #### begin configuration
  88
  89 rootn=1
  90 swapn=2
  91 bootn=3
  92 # ext partition so grub can write persistent variables,
  93 # so it can do a one time boot. grub can't write to
  94 # btrfs or any cow fs because it's more
  95 # more complicated to do and they don't want to.
  96 grub_extn=4
  97 # bios boot partition,
  98 # https://wiki.archlinux.org/index.php/GRUB
  99 bios_grubn=5
 100 lastn=$bios_grubn
 101
 102
 103
 104 ##### end configuration
 105
 106
 107 add-part() { # add partition suffix to $dev
 108   local d ret
 109   if [[ $# == 1 ]]; then
 110     d=$dev
 111     part=$1
 112   else
 113     d=$1
 114     part=$2
 115   fi
 116   if [[ $d == /dev/disk/by-id/* ]]; then
 117     ret=$d-part$part
 118   else
 119     ret=$d$part
 120   fi
 121   echo $ret
 122 }
 123
 124 bootdev() { add-part $@ $bootn; }
 125 rootdev() { add-part $@ $rootn; }
 126 swapdev() { add-part $@ $swapn; }
 127 grub_extdev() { add-part $@ $grub_extn; }
 128 bios_grubdev() { add-part $@ $bios_grubn; }
 129
 130 crypt-dev() { echo /dev/mapper/crypt_dev_${1##*/}; }
 131 crypt-name() { echo crypt_dev_${1##*/}; }
 132 root-cryptdev() { crypt-dev $(rootdev $@); }
 133 swap-cryptdev() { crypt-dev $(swapdev $@); }
 134 root-cryptname() { crypt-name $(rootdev $@); }
 135 swap-cryptname() { crypt-name $(swapdev $@); }
 136
 137 ##### end function defs
 138
 139 if ifclass REPARTITION; then
 140   partition=true # force a full wipe
 141 else
 142   partition=false # change to true to force a full wipe
 143 fi
 144 if ifclass NOWIPE; then
 145   wipe=false
 146 else
 147   wipe=true
 148 fi
 149
 150 ## ignore disks that are mounted, eg when running from fai-cd
 151 declare -A disk_excludes
 152 while read -r l; do
 153   eval "$l"
 154   if [[ ! $PKNAME ]]; then
 155     PKNAME="$KNAME"
 156   fi
 157   if [[ $MOUNTPOINT ]]; then
 158     disk_excludes[$PKNAME]=true
 159   fi
 160 done < <(lsblk -nP -o KNAME,MOUNTPOINT,PKNAME)
 161
 162
 163 hdds=()
 164 ssds=()
 165 cd /sys/block
 166 for disk in [sv]d[a-z]; do
 167   if [[ ${disk_excludes[$disk]} ]]; then
 168     continue
 169   fi
 170   case $(cat $disk/queue/rotational) in
 171     0) ssds+=(/dev/$disk) ;;
 172     1) hdds+=(/dev/$disk) ;;
 173     *) echo "$0: error: unknown /sys/block/$disk/queue/rotational: \
 174 $(cat $disk/queue/rotational)"; exit 1 ;;
 175   esac
 176 done
 177
 178 # install all ssds, or if there are none, all hdds.
 179 # Note, usb flash disks are seen as rotational, which is
 180 # very odd, but convenient for ignoring them here.
 181 # TODO: find a reliable way to ignore them.
 182 if ! ifclass ROTATIONAL && (( ${#ssds[@]} > 0 )); then
 183   short_devs=( ${ssds[@]} )
 184 else
 185   short_devs=( ${hdds[@]} )
 186 fi
 187
 188 # check if the partitions exist have the right filesystems
 189 #blkid="$(blkid -s TYPE)"
 190 for dev in ${short_devs[@]}; do
 191   if $partition; then break; fi
 192   y=$(readlink -f $dev)
 193   arr=($y[0-9])
 194   [[ ${#arr[@]}  == "$lastn" ]] || partition=true
 195   for (( i=1; i <= lastn; i++ )); do
 196     [[ -e ${dev}$i ]] || partition=true
 197   done
 198   # On one system, blkid is missing some partitions.
 199   # maybe we need a flag, like FUZZY_BLKID or something, so we
 200   # can check that at least some exist.
 201   # for x in "`rootdev`: TYPE=\"crypto_LUKS\"" "`bootdev`: TYPE=\"btrfs\""; do
 202   #     echo "$blkid" | grep -Fx "$x" &>/dev/null || partition=true
 203   # done
 204 done
 205
 206 if $partition && ifclass PARTITION_PROMPT; then
 207   echo "Press any key except ctrl-c to continue and partition these drives:"
 208   echo "  ${short_devs[*]}"
 209   read -r
 210 fi
 211
 212 devs=()
 213 shopt -s extglob
 214 for short_dev in ${short_devs[@]}; do
 215   devs+=($(devbyid $short_dev))
 216 done
 217 if [[ ! ${devs[0]} ]]; then
 218   echo "$0: error: failed to detect devs" >&2
 219   exit 1
 220 fi
 221
 222 boot_space=0
 223 first=false
 224 boot_devs=()
 225 for dev in ${devs[@]}; do
 226   if ifclass frodo; then
 227     # I ran into a machine where the bios doesn't know about some disks,
 228     # so 1st stage of grub also doesn't know about them.
 229     # Also, grub does not support mounting degraded btrfs as far as
 230     # I can tell with some googling.
 231     # From within an arch install env, I could detect them by noting
 232     # their partitions were mixed with the next disk in /dev/disk/by-path,
 233     # and I have mixed model disks, and I could see the 8 models which showed
 234     # up in the bios, and thus see which 2 models were missing.
 235     # hdparm -I /dev/sdh will give model info in linux.
 236     # However, in fai on jessie, /dev/disk/by-path dir doesn't exist,
 237     # and I don't see another way, so I'm hardcoding them.
 238     # We still put grub on them and partition them the same, for uniformity
 239     # and in case they get moved to a system that can recognize them,
 240     # we just exclude them from the boot filesystem.
 241     cd /dev/disk/by-id/
 242     bad_disk=false
 243     for id in ata-TOSHIBA_MD04ACA500_8539K4TQFS9A \
 244                 ata-TOSHIBA_MD04ACA500_Y5IFK6IJFS9A; do
 245       if [[ $(readlink -f $id) == "$(readlink -f $dev)" ]]; then
 246         bad_disk=true
 247         break
 248       fi
 249     done
 250     $bad_disk || boot_devs+=($(bootdev))
 251   else
 252     boot_space=$(( boot_space + $(parted -m $dev unit MiB print | \
 253                                     sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 254     boot_devs+=($(bootdev))
 255   fi
 256   if [[ $boot_devs && $first ]]; then
 257     first_grub_extdev=$(grub_extdev)
 258     first=false
 259   fi
 260 done
 261
 262 if ifclass RAID0 || (( ${#boot_devs[@]} == 1 )); then
 263   raid_level=0
 264 elif ifclass RAID1 || (( ${#boot_devs[@]} <= 3 )); then
 265   raid_level=1
 266 else
 267   raid_level=10
 268 fi
 269
 270 ### Begin calculate boot partition space
 271 # due to raid duplication
 272 case $raid_level in
 273   1*) boot_space=$(( boot_space / 2 )) ;;
 274 esac
 275 if (( boot_space > 60000 )); then
 276   # this is larger than needed for several /boot subvols,
 277   # becuase I keep a minimal debian install on it for
 278   # recovery needs and for doing pxe-kexec.
 279   boot_mib=10000
 280 elif (( boot_space > 30000 )); then
 281   boot_mib=$(( 5000 + (boot_space - 30000) / 2 ))
 282 else
 283   # Small vms don't have room for /boot recovery.  With 3 kernels
 284   # installed, i'm using 132M on t8, so this seems like plenty of
 285   # room. note: rhel 8 recomments 1g for /boot.
 286   boot_mib=500
 287   #
 288 fi
 289 case $raid_level in
 290   1*) boot_mib=$(( boot_mib * 2 )) ;;
 291 esac
 292 ### end calculate boot partition space
 293
 294
 295
 296 if [[ ! $DISTRO ]]; then
 297   if ifclass VOL_STRETCH_BOOTSTRAP; then
 298     DISTRO=debianstretch_bootstrap
 299   elif ifclass VOL_STRETCH; then
 300     DISTRO=debianstretch
 301   elif ifclass VOL_BUSTER; then
 302     DISTRO=debianbuster
 303   elif ifclass VOL_TESTING; then
 304     DISTRO=debiantesting
 305   elif ifclass VOL_XENIAL; then
 306     DISTRO=ubuntuxenial
 307   elif ifclass VOL_BIONIC; then
 308     DISTRO=ubuntubionic
 309   elif ifclass VOL_FOCAL; then
 310     DISTRO=ubuntufocal
 311   elif ifclass VOL_BELENOS; then
 312     DISTRO=trisquelbelenos
 313   elif ifclass VOL_FLIDAS; then
 314     DISTRO=trisquelflidas
 315   elif ifclass VOL_ETIONA; then
 316     DISTRO=trisqueletiona
 317   else
 318     echo "PARTITIONER ERROR: no distro class/var set" >&2
 319     exit 1
 320   fi
 321 fi
 322 first_boot_dev=${boot_devs[0]}
 323
 324
 325 bpart() { # btrfs a partition
 326   case $raid_level in
 327     0) mkfs.btrfs -f $@ ;;
 328     1) mkfs.btrfs -f -m raid1 -d raid1 $@ ;;
 329     10) mkfs.btrfs -f -m raid10 -d raid10 $@ ;;
 330   esac
 331 }
 332
 333
 334 if [[ ! -e /a/bin/fai/fai-wrapper ]]; then
 335   # see README for docs about how to create these
 336   luks_dir=$FAI/distro-install-common/luks
 337
 338   luks_file=$luks_dir/host-$HOSTNAME
 339   if [[ ! -e $luks_file ]]; then
 340     hostkeys=($luks_dir/host-*)
 341     # if there is only one key, we might be deploying somewhere
 342     # where dhcp doesnt give us a proper hostname, so use that.
 343     if [[ ${#hostkeys[@]} == 1 && -e ${hostkeys[0]} ]]; then
 344       luks_file=${hostkeys[0]}
 345     else
 346       echo "$0: error: no key for hostname at $luks_file" >&2
 347       exit 1
 348     fi
 349   fi
 350
 351   # # note, corresponding changes in /b/ds/keyscript-{on,off}
 352   if ifclass demohost; then
 353     lukspw=x
 354   elif [[ -e $luks_dir/$HOSTNAME ]]; then
 355     lukspw=$(cat $luks_dir/$HOSTNAME)
 356   else
 357     lukspw=$(cat $luks_dir/iank)
 358   fi
 359 fi
 360
 361
 362 first_root_crypt=$(root-cryptdev ${devs[0]})
 363
 364 # 1.5 x based on https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-partitioning-setup-x86.html#sect-custom-partitioning-x86
 365 swap_mib=$(( $(grep ^MemTotal: /proc/meminfo | \
 366                  awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1024 ))
 367
 368 mkdir -p /tmp/fai
 369 root_devs=()
 370 for dev in ${devs[@]}; do
 371   root_devs+=($(rootdev))
 372 done
 373 shopt -s nullglob
 374 if $partition; then
 375
 376   ### begin wipefs
 377   if [[ ! $SPECIAL_DISK ]]; then
 378     for dev in ${devs[@]}; do
 379       # if we repartition to the same as an old partition,
 380       # we don't want any old fses hanging around.
 381       for (( i=1; i <= lastn; i++ )); do
 382         x=$(add-part $dev $i)
 383         [[ -e $x ]] || continue
 384         count_down=10
 385         # wipefs has failed, manual run works, google suggests timing issue
 386         while ! wipefs -a $x; do
 387           sleep 2
 388           count_down=$((count_down - 1))
 389           (( count_down > 0 )) || exit 1
 390         done
 391       done
 392     done
 393   fi
 394   ### end wipefs
 395
 396   for dev in ${devs[@]}; do
 397     if [[ $SPECIAL_DISK ]]; then
 398       dev=$(devbyid $SPECIAL_DISK)
 399     fi
 400
 401     # parted will round up the disk size. Do -1 so we can have
 402     # fully 1MiB unit partitions for easy resizing of the last partition.
 403     # Otherwise we would pass in -0 for the end argument for the last partition.
 404     #
 405     # Note: parted print error output is expected. example:
 406     # Error: /dev/vda: unrecognised disk label
 407     disk_mib=$(( $(parted -m $dev unit MiB print | \
 408                      sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 409     root_end=$(( disk_mib - swap_mib - boot_mib /  ${#boot_devs[@]} ))
 410     swap_end=$(( root_end + swap_mib))
 411
 412     parted -s $dev mklabel gpt
 413     # MiB because parted complains about alignment otherwise.
 414     pcmd="parted -a optimal -s -- $dev"
 415     $pcmd mkpart primary ext3 12MiB ${root_end}MiB
 416     # without naming, systemd gives us misc errors like:
 417     # dev-disk-by\x2dpartlabel-primary.device: Dev dev-disk-by\x2dpartlabel-primary.device appeared twice
 418     $pcmd name $rootn root
 419     # normally a swap is type "linux-swap", but this is encrypted swap. using that
 420     # label will confuse systemd.
 421     $pcmd mkpart primary "" ${root_end}MiB ${swap_end}MiB
 422     $pcmd name $swapn swap
 423     $pcmd mkpart primary "" ${swap_end}MiB ${disk_mib}MiB
 424     $pcmd name $bootn boot
 425     # i only need a few k, but googling min size,
 426     # I found someone saying that gparted required
 427     # required at least 8 because of their hard drive cylinder size.
 428     # And 8 is still very tiny.
 429     $pcmd mkpart primary "ext2" 4MiB 12MiB
 430     $pcmd name $grub_extn grubext
 431     # gpt ubuntu cloud image uses ~4 mb for this partition. fai uses 1 MiB.
 432     # so, I use 3, whatever.
 433     # note: parted manual saying cheap flash media
 434     # should to start at 4.
 435     $pcmd mkpart primary "" 1MiB 4MiB
 436     $pcmd name $bios_grubn biosgrub
 437     $pcmd set $bios_grubn bios_grub on
 438     $pcmd set $bootn boot on # generally not needed on modern systems
 439     # the mkfs failed before on a vm, which prompted me to add
 440     # sleep .1
 441     # then it failed again on a physical machine
 442     # with:
 443     # Device /dev/disk/by-id/foo doesn't exist or access denied,
 444     # so I added a wait until it existed.
 445     # Then I added the mkfs.ext2, which claimed to succeed,
 446     # but then couldn't be found upon reboot. In that case we didn't
 447     # wait at all. So I've added a 3 second minimum wait.
 448     sleep 3
 449     secs=0
 450     while [[ ! -e $(rootdev) ]] && (( secs < 10 )); do
 451       sleep 1
 452       secs=$((secs +1))
 453     done
 454     # Holds just a single file, rarely written, so
 455     # use ext2, like was often used for the /boot partition.
 456     # This exists because grub can only persist data to a non-cow fs.
 457     # And we use persisting a var in grub to do a one time boot.
 458     # We could pass the data on the kernel command line and persist it
 459     # to grubenv after booting, but that relies on the boot always succeeding.
 460     # This is just a bit more robust, and it could work for booting
 461     # into ipxe which can't persist data, if we ever got that working.
 462     mkfs.ext2 $(grub_extdev)
 463     # when we move to newer than trisquel 8, we can remove
 464     # --type luks1. We can also check on cryptsetup --help | less /compil
 465     # to see about the other settings. Default in debian 9 is luks2.
 466     # You can convert from luks2 to luks 1 by adding a temporary key:
 467     # cryptsetup luksAddKey --pbkdf pbkdf2
 468     # then remove the new format keys with cryptsetup luksRemoveKey
 469     # then cryptsetup convert DEV --type luks1, then readd old keys and remove temp.
 470     yes YES | cryptsetup luksFormat $(rootdev) $luks_file \
 471                          --type luks1 -c aes-cbc-essiv:sha256 -s 256 || [[ $? == 141 ]]
 472     yes "$lukspw" | \
 473       cryptsetup luksAddKey --key-file $luks_file \
 474                  $(rootdev) || [[ $? == 141 ]]
 475     # background: Keyfile and password are treated just
 476     # like 2 ways to input a passphrase, so we don't actually need to have
 477     # different contents of keyfile and passphrase, but it makes some
 478     # security sense to a really big randomly generated passphrase
 479     # as much as possible, so we have both.
 480     #
 481     # This would remove the keyfile.
 482     #    yes 'test' | cryptsetup luksRemoveKey /dev/... \
 483       #                            /key/file || [[ $? == 141 ]]
 484
 485     cryptsetup luksOpen $(rootdev) $(root-cryptname) \
 486                --key-file $luks_file
 487
 488     if [[ $SPECIAL_DISK ]]; then
 489       exit 0
 490     fi
 491   done
 492   ls -la /dev/btrfs-control # this was probably for debugging...
 493   sleep 1
 494   bpart $(for dev in ${devs[@]}; do root-cryptdev; done)
 495   bpart ${boot_devs[@]}
 496 else
 497   for dev in ${devs[@]}; do
 498     if [[ -e /dev/mapper/$(root-cryptname) ]]; then
 499       continue
 500     fi
 501     cryptsetup luksOpen $(rootdev) $(root-cryptname) \
 502                --key-file $luks_file
 503   done
 504   sleep 1
 505 fi
 506
 507
 508 if $wipe && [[ $DISTRO != debianstretch_bootstrap ]]; then
 509   # bootstrap distro doesn't use separate encrypted root.
 510   mount -o subvolid=0 $first_root_crypt /mnt
 511   # systemd creates subvolumes we want to delete.
 512   s=($(btrfs subvolume list --sort=-path /mnt |
 513          sed -rn "s#^.*path\s*(root_$DISTRO/\S+)\s*\$#\1#p"))
 514   for subvol in ${s[@]}; do btrfs subvolume delete /mnt/$subvol; done
 515   btrfs subvolume set-default 0 /mnt
 516   [[ ! -e /mnt/root_$DISTRO ]] || btrfs subvolume delete /mnt/root_$DISTRO
 517
 518   ## create subvols ##
 519   cd /mnt
 520
 521   btrfs subvolume create root_$DISTRO
 522
 523   # could set default subvol like this, but no reason to.
 524   # btrfs subvolume set-default \
 525     #       $(btrfs subvolume list . | grep "root_$DISTRO$" | awk '{print $2}') .
 526
 527   # no cow on the root filesystem. it's setup is fully scripted,
 528   # if it's messed up, we will just recreated it,
 529   # and we can get better perf with this.
 530   # I can't remember exactly why, but this is preferable to mounting with
 531   # -o nodatacow, I think because subvolumes inherit that.
 532   chattr -Rf +C root_$DISTRO
 533   cd /
 534   umount /mnt
 535 fi
 536
 537 mount -o subvolid=0 $first_boot_dev /mnt
 538 cd /mnt
 539 btrfs subvolume set-default 0 /mnt # already default, just ensuring it.
 540
 541 # for libreboot systems. grub2 only reads from subvolid=0
 542 mkdir -p /mnt/grub2
 543 cp $FAI/distro-install-common/libreboot_grub.cfg /mnt/grub2
 544
 545 if [[ $DISTRO == debianstretch_bootstrap ]]; then
 546   # this is just convenience for the libreboot_grub config
 547   # so we can glob the other ones easier.
 548   boot_vol=$DISTRO
 549 else
 550   boot_vol=boot_$DISTRO
 551 fi
 552 if $wipe; then
 553   if [[ -e /mnt/$boot_vol ]]; then
 554     btrfs subvolume delete /mnt/$boot_vol
 555   fi
 556   btrfs subvolume create $boot_vol
 557 fi
 558 cd /
 559 umount /mnt
 560 ## end create subvols ##
 561
 562 dev=${boot_devs[0]}
 563 mount $first_grub_extdev /mnt
 564 grub-editenv /mnt/grubenv set did_fai_check=true
 565 grub-editenv /mnt/grubenv set last_boot=/$boot_vol
 566 umount /mnt
 567
 568 if [[ $DISTRO == debianstretch_bootstrap ]]; then
 569   cat > /tmp/fai/fstab <<EOF
 570 $first_boot_dev  /  btrfs  noatime,subvol=$boot_vol  0 0
 571 EOF
 572   cat >/tmp/fai/disk_var.sh <<EOF
 573 BOOT_DEVICE="${short_devs[@]}"
 574 ROOT_PARTITION=$first_boot_dev
 575 EOF
 576 else
 577   # note, fai creates the mountpoints listed here
 578   cat > /tmp/fai/fstab <<EOF
 579 $first_root_crypt  /  btrfs          noatime,subvol=root_$DISTRO  0 0
 580 $first_root_crypt  /mnt/root  btrfs  nofail,noatime,subvolid=0  0 0
 581 $first_boot_dev  /boot  btrfs        nofail,noatime,subvol=$boot_vol  0 0
 582 $first_boot_dev  /mnt/boot  btrfs    nofail,noatime,subvolid=0  0 0
 583 EOF
 584   swaps=()
 585   rm -f /tmp/fai/crypttab
 586   for dev in ${devs[@]}; do
 587     swaps+=($(swap-cryptname))
 588     cat >>/tmp/fai/crypttab <<EOF
 589 $(root-cryptname) $(rootdev)  none  keyscript=/root/keyscript,discard,luks,initramfs
 590 $(swap-cryptname) $(swapdev)  /dev/urandom  swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
 591 EOF
 592     cat >> /tmp/fai/fstab <<EOF
 593 $(swap-cryptdev)  none  swap  nofail,sw  0 0
 594 EOF
 595   done
 596
 597   # fai would do this:
 598   #BOOT_DEVICE=\${BOOT_DEVICE:-"${devs[0]}"}
 599
 600   # note: swaplist seems to do nothing.
 601   cat >/tmp/fai/disk_var.sh <<EOF
 602 BOOT_DEVICE="${short_devs[@]}"
 603 BOOT_PARTITION=\${BOOT_PARTITION:-$first_boot_dev}
 604 # ROOT_PARTITIONS is added by me, used in arch setup.
 605 ROOT_PARTITIONS="${root_devs[@]}"
 606 ROOT_PARTITION=\${ROOT_PARTITION:-$first_root_crypt}
 607 SWAPLIST=\${SWAPLIST:-"${swaps[@]}"}
 608 EOF
 609 fi