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 PS4='+ $LINENO '
  19 set -eE -o pipefail
  20 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
  21
  22 if [[ $EUID != 0 ]]; then
  23   echo "$0: error: need to run as root" >&2
  24   exit 1
  25 fi
  26
  27 # for calling outside of FAI:
  28 # fai-redep
  29 # s
  30 # source /b/fai/fai-wrapper
  31 # - set any appropriate classes with: fai-setclass OPT1... which sets CLASS_OPT1=true...
  32 #   or run eval-fai-classfile FILE.
  33 # - Set a VOL_DISTROVER, eg:
  34 #   fai-setclass VOL_NABIA
  35 # - export luks_dir=/q/root/luks
  36 #
  37 # OPTIONS:
  38 #
  39 # environment variables:
  40 #
  41 # HOSTNAME: if frodo, we exclude 2 devices from the /boot array, which
  42 # the bios does not see. if demohost, we set the luks password to just
  43 # 'x'.
  44 #
  45 # SPECIAL_DISK: For use outside of fai. A base disk name like
  46 # /dev/sdk. If set, we just cryptsetup and partition this one disk then
  47 # exit. This is useful for partitioning a disk in preparation to replace
  48 # a failed or failing disk from a raid10 array.
  49 #
  50 # classes:
  51 #
  52 # REPARTITION: forces repartitioning even if we detect the proper amount
  53 # of partitions already exist.
  54 #
  55 # NOWIPE: use existing subvolumes if they exist
  56 #
  57 # ROTATIONAL: forces to install onto hdds instead of sdds. normally sdds
  58 # are chosen if they exist.
  59 #
  60 # PARTITION_PROMPT: command line prompt before partitioning
  61 #
  62 # RAID0: forces raid0 filesystem. Normally with 4+ devices, we use
  63 # raid10.
  64 # RAID1: forces raid1 filesystem.
  65
  66 if [[ $SPECIAL_DISK ]]; then
  67   export CLASS_REPARTITION=true
  68 fi
  69
  70 # # fai's setup-storage won't do btrfs on luks,
  71 # # so we do it ourself :)
  72 # inspiration taken from files in fai-setup-storage package
  73
  74 # if we are not running in fai, skiptask won't be defined, so carry on.
  75 skiptask partition || ! type skiptask
  76
  77 if ! type -p devbyid; then
  78   for d in $FAI/distro-install-common \
  79                /a/bin/fai/fai/config/distro-install-common $FAI $PWD; do
  80     [[ -d $d ]] || continue
  81     if [[ -e $d/devbyid ]]; then
  82       devbyid=$d/devbyid
  83       devbyid() { $devbyid "$@"; }
  84       break
  85     fi
  86   done
  87   if [[ ! $devbyid ]]; then
  88     echo "$0: error: failed to find devbyid script" >&2
  89     exit 1
  90   fi
  91 fi
  92
  93
  94
  95 #### begin configuration
  96
  97 # this is the ordering of the /dev/sdaX, but
  98 # the ordering of the partition layout goes like this:
  99 # bios_grub
 100 # grub_ext
 101 # efi
 102 # root
 103 # swap
 104 # boot
 105
 106 rootn=1
 107 swapn=2
 108 bootn=3
 109 efin=4
 110 # ext partition so grub can write persistent variables,
 111 # so it can do a one time boot. grub can't write to
 112 # btrfs or any cow fs because it's more
 113 # more complicated to do and they don't want to.
 114 grub_extn=5
 115 # bios boot partition,
 116 # https://wiki.archlinux.org/index.php/GRUB
 117 bios_grubn=6
 118 even_bign=7
 119 lastn=$bios_grubn
 120
 121
 122
 123 ##### end configuration
 124
 125
 126 add-part() { # add partition suffix to $dev
 127   local d part
 128   if [[ $# == 1 ]]; then
 129     d=$dev
 130     part=$1
 131   else
 132     d=$1
 133     part=$2
 134   fi
 135   echo $d-part$part
 136 }
 137
 138 bootdev() { add-part $@ $bootn; }
 139 rootdev() { add-part $@ $rootn; }
 140 swapdev() { add-part $@ $swapn; }
 141 efidev() { add-part $@ $efin; }
 142 grub_extdev() { add-part $@ $grub_extn; }
 143 bios_grubdev() { add-part $@ $bios_grubn; }
 144 even_bigdev() { add-part $@ $even_bign; }
 145
 146 crypt-dev() { echo /dev/mapper/crypt_dev_${1##*/}; }
 147 crypt-name() { echo crypt_dev_${1##*/}; }
 148 root-cryptdev() { crypt-dev $(rootdev $@); }
 149 swap-cryptdev() { crypt-dev $(swapdev $@); }
 150 root-cryptname() { crypt-name $(rootdev $@); }
 151 swap-cryptname() { crypt-name $(swapdev $@); }
 152
 153 dev-mib() {
 154   local d=${1:-$dev}
 155   echo $(( $(parted -m $d unit MiB print | \
 156                sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 157 }
 158
 159 luks-setup() {
 160   local luksdev="$1"
 161   # when we move to newer than trisquel 9, we can remove
 162   # --type luks1. We can also check on cryptsetup --help | less /compil
 163   # to see about the other settings. Default in debian 9 is luks2.
 164   # You can convert from luks2 to luks 1 by adding a temporary key:
 165   # cryptsetup luksAddKey --pbkdf pbkdf2
 166   # then remove the new format keys with cryptsetup luksRemoveKey
 167   # then cryptsetup convert DEV --type luks1, then readd old keys and remove temp.
 168   yes YES | cryptsetup luksFormat $luksdev $luks_file \
 169                        --type luks1 -c aes-cbc-essiv:sha256 -s 256 || [[ $? == 141 ]]
 170   yes "$lukspw" | \
 171     cryptsetup luksAddKey --key-file $luks_file \
 172                $luksdev || [[ $? == 141 ]]
 173   # background: Keyfile and password are treated just
 174   # like 2 ways to input a passphrase, so we don't actually need to have
 175   # different contents of keyfile and passphrase, but it makes some
 176   # security sense to a really big randomly generated passphrase
 177   # as much as possible, so we have both.
 178   #
 179   # This would remove the keyfile.
 180   #    yes 'test' | cryptsetup luksRemoveKey /dev/... \
 181     #                            /key/file || [[ $? == 141 ]]
 182   cryptsetup luksOpen $luksdev $(crypt-name $luksdev) --key-file $luks_file
 183 }
 184
 185 ##### end function defs
 186
 187 if ifclass REPARTITION; then
 188   partition=true # force a full wipe
 189 else
 190   partition=false # change to true to force a full wipe
 191 fi
 192 if ifclass NOWIPE; then
 193   wipe=false
 194 else
 195   wipe=true
 196 fi
 197
 198 if (($(nproc) > 2)); then
 199   mopts=,compress=zstd
 200 fi
 201
 202 declare -A disk_excludes
 203 if ! ifclass USE_MOUNTED; then
 204   ## ignore disks that are mounted, eg when running from fai-cd
 205   while read -r l; do
 206     eval "$l"
 207     if [[ ! $PKNAME ]]; then
 208       PKNAME="$KNAME"
 209     fi
 210     if [[ $MOUNTPOINT ]]; then
 211       disk_excludes[$PKNAME]=true
 212     fi
 213   done < <(lsblk -nP -o KNAME,MOUNTPOINT,PKNAME)
 214 fi
 215
 216 hdds=()
 217 ssds=()
 218 # this excludes usb. note: i may encounter some other type in the future.
 219 for disk in $(lsblk -do name,tran -n | awk '$2 ~ "^(sata|nvme)$" { print $1 }'); do
 220   if [[ ${disk_excludes[$disk]} ]]; then
 221     continue
 222   fi
 223   case $(cat /sys/block/$disk/queue/rotational) in
 224     0) ssds+=(/dev/$disk) ;;
 225     1) hdds+=(/dev/$disk) ;;
 226     *) echo "$0: error: unknown /sys/block/$disk/queue/rotational: \
 227 $(cat $disk/queue/rotational)"; exit 1 ;;
 228   esac
 229 done
 230
 231 # install all ssds, or if there are none, all hdds.
 232 # Note, usb flash disks are seen as rotational, which is
 233 # very odd, but convenient for ignoring them here.
 234 # TODO: find a reliable way to ignore them.
 235 if ! ifclass ROTATIONAL && (( ${#ssds[@]} > 0 )); then
 236   short_devs=( ${ssds[@]} )
 237 else
 238   short_devs=( ${hdds[@]} )
 239 fi
 240
 241 # check if the partitions exist have the right filesystems
 242 #blkid="$(blkid -s TYPE)"
 243 for dev in ${short_devs[@]}; do
 244   if $partition; then break; fi
 245   y=$(readlink -f $dev)
 246   arr=($y?*)
 247   if (( ${#arr[@]} < lastn )); then
 248     partition=true
 249   fi
 250   # On one system, blkid is missing some partitions.
 251   # maybe we need a flag, like FUZZY_BLKID or something, so we
 252   # can check that at least some exist.
 253   # for x in "`rootdev`: TYPE=\"crypto_LUKS\"" "`bootdev`: TYPE=\"btrfs\""; do
 254   #     echo "$blkid" | grep -Fx "$x" &>/dev/null || partition=true
 255   # done
 256 done
 257
 258 if $partition && ifclass PARTITION_PROMPT; then
 259   echo "Press any key except ctrl-c to continue and partition these drives:"
 260   echo "  ${short_devs[*]}"
 261   read -r
 262 fi
 263
 264 devs=()
 265 shopt -s extglob
 266 for short_dev in ${short_devs[@]}; do
 267   devs+=($(devbyid $short_dev))
 268 done
 269 if [[ ! ${devs[0]} ]]; then
 270   echo "$0: error: failed to detect devs" >&2
 271   exit 1
 272 fi
 273
 274 boot_space=0
 275 first=true
 276 boot_devs=()
 277 for dev in ${devs[@]}; do
 278   if ifclass frodo; then
 279     # I ran into a machine where the bios doesn't know about some disks,
 280     # so 1st stage of grub also doesn't know about them.
 281     # Also, grub does not support mounting degraded btrfs as far as
 282     # I can tell with some googling.
 283     # From within an arch install env, I could detect them by noting
 284     # their partitions were mixed with the next disk in /dev/disk/by-path,
 285     # and I have mixed model disks, and I could see the 8 models which showed
 286     # up in the bios, and thus see which 2 models were missing.
 287     # hdparm -I /dev/sdh will give model info in linux.
 288     # However, in fai on jessie, /dev/disk/by-path dir doesn't exist,
 289     # and I don't see another way, so I'm hardcoding them.
 290     # We still put grub on them and partition them the same, for uniformity
 291     # and in case they get moved to a system that can recognize them,
 292     # we just exclude them from the boot filesystem.
 293     cd /dev/disk/by-id/
 294     bad_disk=false
 295     for id in ata-TOSHIBA_MD04ACA500_8539K4TQFS9A \
 296                 ata-TOSHIBA_MD04ACA500_Y5IFK6IJFS9A; do
 297       if [[ $(readlink -f $id) == "$(readlink -f $dev)" ]]; then
 298         bad_disk=true
 299         break
 300       fi
 301     done
 302     $bad_disk || boot_devs+=($(bootdev))
 303   else
 304     boot_space=$(( boot_space + $(parted -m $dev unit MiB print | \
 305                                     sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 306     boot_devs+=($(bootdev))
 307   fi
 308   if $first && [[ $boot_devs ]]; then
 309     first_efi=$(efidev)
 310     first_grub_extdev=$(grub_extdev)
 311     first=false
 312   fi
 313 done
 314 first_boot_dev=${boot_devs[0]}
 315
 316 even_raid=false
 317 if ifclass RAID0 || (( ${#boot_devs[@]} == 1 )); then
 318   raid_level=0
 319 elif ifclass RAID1 || (( ${#boot_devs[@]} <= 3 )); then
 320   if (( ${#boot_devs[@]} == 2 )); then
 321     even_raid=true
 322   fi
 323   raid_level=1
 324 else
 325   raid_level=10
 326 fi
 327
 328 ### Begin calculate boot partition space
 329 # due to raid duplication
 330 case $raid_level in
 331   1*) boot_space=$(( boot_space / 2 )) ;;
 332 esac
 333 if (( boot_space > 60000 )); then
 334   # this is larger than needed for several /boot subvols,
 335   # becuase I keep a minimal debian install on it for
 336   # recovery needs and for doing pxe-kexec.
 337   boot_mib=10000
 338 elif (( boot_space > 30000 )); then
 339   boot_mib=$(( 5000 + (boot_space - 30000) / 2 ))
 340 else
 341   # Small vms don't have room for /boot recovery.  With 3 kernels
 342   # installed, i'm using 132M on t8, so this seems like plenty of
 343   # room. note: rhel 8 recomments 1g for /boot.
 344   boot_mib=500
 345   #
 346 fi
 347 case $raid_level in
 348   1*) boot_mib=$(( boot_mib * 2 )) ;;
 349 esac
 350 ### end calculate boot partition space
 351
 352
 353
 354 if [[ ! $DISTRO ]]; then
 355   if ifclass VOL_BUSTER_BOOTSTRAP; then
 356     DISTRO=debianbuster_bootstrap
 357   elif ifclass VOL_STRETCH; then
 358     DISTRO=debianstretch
 359   elif ifclass VOL_BUSTER; then
 360     DISTRO=debianbuster
 361   elif ifclass VOL_BULLSEYE; then
 362     DISTRO=debianbullseye
 363   elif ifclass VOL_TESTING; then
 364     DISTRO=debiantesting
 365   elif ifclass VOL_XENIAL; then
 366     DISTRO=ubuntuxenial
 367   elif ifclass VOL_BIONIC; then
 368     DISTRO=ubuntubionic
 369   elif ifclass VOL_FOCAL; then
 370     DISTRO=ubuntufocal
 371   elif ifclass VOL_FLIDAS; then
 372     DISTRO=trisquelflidas
 373   elif ifclass VOL_ETIONA; then
 374     DISTRO=trisqueletiona
 375   elif ifclass VOL_NABIA; then
 376     DISTRO=trisquelnabia
 377   else
 378     echo "PARTITIONER ERROR: no distro class/var set" >&2
 379     exit 1
 380   fi
 381 fi
 382
 383
 384 bpart() { # btrfs a partition
 385   case $raid_level in
 386     0) mkfs.btrfs -f $@ ;;
 387     1) mkfs.btrfs -f -m raid1 -d raid1 $@ ;;
 388     10) mkfs.btrfs -f -m raid10 -d raid10 $@ ;;
 389   esac
 390 }
 391
 392
 393 if [[ ! $luks_dir ]]; then
 394   # see README for docs about how to create these
 395   luks_dir=$FAI/distro-install-common/luks
 396 fi
 397
 398 luks_file=$luks_dir/host-$HOSTNAME
 399 if [[ ! -e $luks_file ]]; then
 400   hostkeys=($luks_dir/host-*)
 401   # if there is only one key, we might be deploying somewhere
 402   # where dhcp doesnt give us a proper hostname, so use that.
 403   if [[ ${#hostkeys[@]} == 1 && -e ${hostkeys[0]} ]]; then
 404     luks_file=${hostkeys[0]}
 405   else
 406     echo "$0: error: no key for hostname at $luks_file" >&2
 407     exit 1
 408   fi
 409 fi
 410
 411 # # note, corresponding changes in /b/ds/keyscript-{on,off}
 412 if ifclass demohost; then
 413   lukspw=x
 414 elif [[ -e $luks_dir/$HOSTNAME ]]; then
 415   lukspw=$(cat $luks_dir/$HOSTNAME)
 416 else
 417   lukspw=$(cat $luks_dir/iank)
 418 fi
 419
 420
 421 first_root_crypt=$(root-cryptdev ${devs[0]})
 422
 423 # 1.5 x based on https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-partitioning-setup-x86.html#sect-custom-partitioning-x86
 424 swap_mib=$(( $(grep ^MemTotal: /proc/meminfo | \
 425                  awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1024 ))
 426
 427 mkdir -p /tmp/fai
 428 root_devs=()
 429 for dev in ${devs[@]}; do
 430   root_devs+=($(rootdev))
 431 done
 432 shopt -s nullglob
 433 if $partition; then
 434
 435   ### begin wipefs
 436   if [[ ! $SPECIAL_DISK ]]; then
 437     for dev in ${devs[@]}; do
 438       # if we repartition to the same as an old partition,
 439       # we don't want any old fses hanging around.
 440       for (( i=1; i <= lastn; i++ )); do
 441         x=$(add-part $i)
 442         [[ -e $x ]] || continue
 443         count_down=10
 444         # wipefs has failed, manual run works, google suggests timing issue
 445         while ! wipefs -a $x; do
 446           sleep 2
 447           count_down=$((count_down - 1))
 448           (( count_down > 0 )) || exit 1
 449         done
 450       done
 451     done
 452   fi
 453   ### end wipefs
 454
 455
 456   # When we have 2 disks of at least 100g difference in size,
 457   # make an extra partition on the end of the bigger one.
 458   even_big_part=false
 459   even_diff_min=100000
 460   if $even_raid; then
 461     smalli=0
 462     bigi=1
 463     if (( $(dev-mib ${devs[0]}) >= $(dev-mib ${devs[1]}) )); then
 464       smalli=1
 465       bigi=0
 466     fi
 467     disk_mib=$(dev-mib ${devs[smalli]})
 468     even_big_dev=${devs[bigi]}
 469     even_big_mib=$(dev-mib $even_big_dev)
 470     if (( even_big_mib - disk_mib > even_diff_min )); then
 471       even_big_part=true
 472     fi
 473   fi
 474
 475   for dev in ${devs[@]}; do
 476     if [[ $SPECIAL_DISK ]]; then
 477       dev=$(devbyid $SPECIAL_DISK)
 478     fi
 479
 480     # parted will round up the disk size. Do -1 so we can have
 481     # fully 1MiB unit partitions for easy resizing of the last partition.
 482     # Otherwise we would pass in -0 for the end argument for the last partition.
 483     #
 484     # Note: parted print error output is expected. example:
 485     # Error: /dev/vda: unrecognised disk label
 486     if ! $even_raid; then
 487       disk_mib=$(dev-mib)
 488     fi
 489     efi_mib=512
 490     root_end=$(( disk_mib - swap_mib - boot_mib /  ${#boot_devs[@]} - efi_mib ))
 491     swap_end=$(( root_end + swap_mib))
 492
 493     parted -s $dev mklabel gpt
 494     # MiB because parted complains about alignment otherwise.
 495     pcmd="parted -a optimal -s -- $dev"
 496     # root partition, the main big one
 497     $pcmd mkpart primary ext3 524MiB ${root_end}MiB
 498     # without naming, systemd gives us misc errors like:
 499     # dev-disk-by\x2dpartlabel-primary.device: Dev dev-disk-by\x2dpartlabel-primary.device appeared twice
 500     $pcmd name $rootn root
 501     # normally a swap is type "linux-swap", but this is encrypted swap. using that
 502     # label will confuse systemd.
 503     # swap partition
 504     $pcmd mkpart primary "" ${root_end}MiB ${swap_end}MiB
 505     $pcmd name $swapn swap
 506     # boot partition
 507     $pcmd mkpart primary "" ${swap_end}MiB ${disk_mib}MiB
 508     $pcmd name $bootn boot
 509     # uefi partition. efi sucks, half a gig, rediculous.
 510     $pcmd mkpart primary "fat32" 12MiB 524MiB
 511     $pcmd name $efin efi
 512     $pcmd set $efin esp on
 513     # note, this is shown here: https://support.system76.com/articles/bootloader/
 514     # but not mentioned https://wiki.archlinux.org/index.php/EFI_system_partition
 515     # probably not needed
 516     $pcmd set $bootn boot on
 517     # i only need a few k, but googling min size,
 518     # I found someone saying that gparted required
 519     # required at least 8 because of their hard drive cylinder size.
 520     # And 8 is still very tiny.
 521     # grub_ext partition
 522     $pcmd mkpart primary "ext2" 4MiB 12MiB
 523     $pcmd name $grub_extn grubext
 524     # gpt ubuntu cloud image uses ~4 mb for this partition. fai uses 1 MiB.
 525     # so, I use 3, whatever.
 526     # note: parted manual saying cheap flash media
 527     # should to start at 4.
 528     # biols grub partition
 529     $pcmd mkpart primary "" 1MiB 4MiB
 530     $pcmd name $bios_grubn biosgrub
 531     $pcmd set $bios_grubn bios_grub on
 532     $pcmd set $bootn boot on # generally not needed on modern systems
 533     if $even_big_part  && [[ $dev == $even_big_dev ]]; then
 534       $pcmd mkpart primary ext3 ${disk_mib}MiB ${even_big_mib}MiB
 535       $pcmd name $even_bign even_big
 536     fi
 537
 538     # the mkfs failed before on a vm, which prompted me to add
 539     # sleep .1
 540     # then it failed again on a physical machine
 541     # with:
 542     # Device /dev/disk/by-id/foo doesn't exist or access denied,
 543     # so I added a wait until it existed.
 544     # Then I added the mkfs.ext2, which claimed to succeed,
 545     # but then couldn't be found upon reboot. In that case we didn't
 546     # wait at all. So I've added a 3 second minimum wait.
 547     secs=0
 548     while [[ ! -e $(bios_grubdev) ]] && (( secs < 10 )); do
 549       sleep 1
 550       secs=$((secs +1))
 551     done
 552     sleep 3
 553
 554     mkfs.fat -F32 $(efidev)
 555
 556     if $even_big_part  && [[ $dev == $even_big_dev ]]; then
 557       luks-setup $(even_bigdev)
 558       mkfs.btrfs -f $(crypt-dev $(even_bigdev))
 559     fi
 560
 561     # Holds just a single file, rarely written, so
 562     # use ext2, like was often used for the /boot partition.
 563     # This exists because grub can only persist data to a non-cow fs.
 564     # And we use persisting a var in grub to do a one time boot.
 565     # We could pass the data on the kernel command line and persist it
 566     # to grubenv after booting, but that relies on the boot always succeeding.
 567     # This is just a bit more robust, and it could work for booting
 568     # into ipxe which can't persist data, if we ever got that working.
 569     mkfs.ext2 $(grub_extdev)
 570     luks-setup $(rootdev)
 571
 572     if [[ $SPECIAL_DISK ]]; then
 573       exit 0
 574     fi
 575   done
 576   ls -la /dev/btrfs-control # this was probably for debugging...
 577   sleep 1
 578   bpart $(for dev in ${devs[@]}; do root-cryptdev; done)
 579   bpart ${boot_devs[@]}
 580 else
 581   for dev in ${devs[@]}; do
 582     if [[ -e /dev/mapper/$(root-cryptname) ]]; then
 583       continue
 584     fi
 585     cryptsetup luksOpen $(rootdev) $(root-cryptname) \
 586                --key-file $luks_file
 587   done
 588   sleep 1
 589 fi
 590
 591
 592 if $wipe && [[ $DISTRO != debianbuster_bootstrap ]]; then
 593   # bootstrap distro doesn't use separate encrypted root.
 594   mount -o subvolid=0 $first_root_crypt /mnt
 595   # systemd creates subvolumes we want to delete.
 596   s=($(btrfs subvolume list --sort=-path /mnt |
 597          sed -rn "s#^.*path\s*(root_$DISTRO/\S+)\s*\$#\1#p"))
 598   for subvol in ${s[@]}; do btrfs subvolume delete /mnt/$subvol; done
 599   btrfs subvolume set-default 0 /mnt
 600   [[ ! -e /mnt/root_$DISTRO ]] || btrfs subvolume delete /mnt/root_$DISTRO
 601
 602   ## create subvols ##
 603   cd /mnt
 604
 605   btrfs subvolume create root_$DISTRO
 606
 607   # could set default subvol like this, but no reason to.
 608   # btrfs subvolume set-default \
 609     #       $(btrfs subvolume list . | grep "root_$DISTRO$" | awk '{print $2}') .
 610
 611   # For raid systems, cow allows for error correction, for non-raid systems,
 612   # protects root fs from having the plug pulled. Reprovisioning a root
 613   # subvol is not my favorite thing to do.
 614   # # no cow on the root filesystem. it's setup is fully scripted,
 615   # # if it's messed up, we will just recreated it,
 616   # # and we can get better perf with this.
 617   # # I can't remember exactly why, but this is preferable to mounting with
 618   # # -o nodatacow, I think because subvolumes inherit that.
 619   # chattr -Rf +C root_$DISTRO
 620   cd /
 621   umount /mnt
 622 fi
 623
 624 mount -o subvolid=0 $first_boot_dev /mnt
 625 cd /mnt
 626 btrfs subvolume set-default 0 /mnt # already default, just ensuring it.
 627
 628 # for libreboot systems. grub2 only reads from subvolid=0
 629 mkdir -p /mnt/grub2
 630 cp $FAI/distro-install-common/libreboot_grub.cfg /mnt/grub2
 631
 632 if [[ $DISTRO == debianbuster_bootstrap ]]; then
 633   # this is just convenience for the libreboot_grub config
 634   # so we can glob the other ones easier.
 635   boot_vol=$DISTRO
 636 else
 637   boot_vol=boot_$DISTRO
 638 fi
 639 if $wipe && [[ -e /mnt/$boot_vol ]]; then
 640   btrfs subvolume delete /mnt/$boot_vol
 641 fi
 642 if [[ ! -e /mnt/$boot_vol ]]; then
 643   btrfs subvolume create $boot_vol
 644 fi
 645 cd /
 646 umount /mnt
 647 ## end create subvols ##
 648
 649 dev=${boot_devs[0]}
 650 mount $first_grub_extdev /mnt
 651 grub-editenv /mnt/grubenv set did_fai_check=true
 652 grub-editenv /mnt/grubenv set last_boot=/$boot_vol
 653 umount /mnt
 654
 655 if [[ $DISTRO == debianbuster_bootstrap ]]; then
 656   cat > /tmp/fai/fstab <<EOF
 657 $first_boot_dev  /  btrfs  noatime,subvol=$boot_vol  0 0
 658 $first_efi  /boot/efi  vfat          nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s  0 0
 659 EOF
 660   cat >/tmp/fai/disk_var.sh <<EOF
 661 BOOT_DEVICE="${short_devs[@]}"
 662 ROOT_PARTITION=$first_boot_dev
 663 EOF
 664 else
 665   # note, fai creates the mountpoints listed here
 666   cat > /tmp/fai/fstab <<EOF
 667 $first_root_crypt  /  btrfs          x-systemd.device-timeout=90s,x-systemd.mount-timeout=90s,noatime,subvol=root_$DISTRO$mopts  0 0
 668 $first_root_crypt  /mnt/root  btrfs  nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s,noatime,subvolid=0$mopts  0 0
 669 $first_boot_dev  /boot  btrfs        nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s,noatime,subvol=$boot_vol  0 0
 670 $first_efi  /boot/efi  vfat          nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s  0 0
 671 $first_boot_dev  /mnt/boot  btrfs    nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s,noatime,subvolid=0  0 0
 672 EOF
 673   swaps=()
 674   rm -f /tmp/fai/crypttab
 675   for dev in ${devs[@]}; do
 676     swaps+=($(swap-cryptname))
 677     cat >>/tmp/fai/crypttab <<EOF
 678 $(root-cryptname) $(rootdev)  none  keyscript=/root/keyscript,discard,luks,initramfs
 679 $(swap-cryptname) $(swapdev)  /dev/urandom  swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
 680 EOF
 681     cat >> /tmp/fai/fstab <<EOF
 682 $(swap-cryptdev)  none  swap  nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s,sw  0 0
 683 EOF
 684   done
 685
 686   # fai would do this:
 687   #BOOT_DEVICE=\${BOOT_DEVICE:-"${devs[0]}"}
 688
 689   # note: swaplist seems to do nothing.
 690   cat >/tmp/fai/disk_var.sh <<EOF
 691 BOOT_DEVICE="${short_devs[@]}"
 692 BOOT_PARTITION=\${BOOT_PARTITION:-$first_boot_dev}
 693 # ROOT_PARTITIONS is added by me, used in arch setup.
 694 ROOT_PARTITIONS="${root_devs[@]}"
 695 ROOT_PARTITION=\${ROOT_PARTITION:-$first_root_crypt}
 696 SWAPLIST=\${SWAPLIST:-"${swaps[@]}"}
 697 EOF
 698
 699
 700   if [[ $HOSTNAME == kd ]]; then
 701     # note, having these with keyscript and initramfs causes a luks error in fai.log,
 702     # but it is safely ignorable and gets us the ability to just type our password
 703     # in once at boot. A downside is that they are probably needed to be plugged in to boot.
 704     cat >>/tmp/fai/crypttab <<EOF
 705 crypt_dev_ata-Samsung_SSD_870_QVO_8TB_S5VUNG0N900656V-part7 /dev/disk/by-id/ata-Samsung_SSD_870_QVO_8TB_S5VUNG0N900656V-part7  none  keyscript=decrypt_keyctl,discard,luks,initramfs
 706 crypt_dev_ata-TOSHIBA_MD04ACA500_84R2K773FS9A-part1 /dev/disk/by-id/ata-TOSHIBA_MD04ACA500_84R2K773FS9A-part1  none  keyscript=decrypt_keyctl,discard,luks,initramfs
 707 crypt_dev_ata-ST6000DM001-1XY17Z_Z4D29EBL-part1 /dev/disk/by-id/ata-ST6000DM001-1XY17Z_Z4D29EBL-part1  none  keyscript=decrypt_keyctl,discard,luks,initramfs
 708 EOF
 709     cat >> /tmp/fai/fstab <<EOF
 710 # r7 = root partition7
 711 /dev/mapper/crypt_dev_ata-Samsung_SSD_870_QVO_8TB_S5VUNG0N900656V-part7  /mnt/r7  btrfs  nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s,noatime,compress=zstd,subvolid=0  0 0
 712 /dev/mapper/crypt_dev_ata-TOSHIBA_MD04ACA500_84R2K773FS9A-part1  /mnt/rust1  btrfs  nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s,noatime,compress=zstd,subvolid=0  0 0
 713 /dev/mapper/crypt_dev_ata-ST6000DM001-1XY17Z_Z4D29EBL-part1  /mnt/rust2  btrfs  nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s,noatime,compress=zstd,subvolid=0  0 0
 714 EOF
 715   fi
 716
 717 fi
 718
 719 # initial setup of extra data fs, mounted,
 720 # btrfs subvol create nocow
 721 # chattr +C nocow
 722 # chown iank.iank nocow
 723