2 # Copyright (C) 2016 Ian Kelling
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.
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.
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.
19 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
21 # for calling outside of FAI, first
22 # source /a/bin/fai-wrapper
23 # then to set classes with: fai-setclass OPT1...
24 # which sets CLASS_OPT1=true...
28 # environment variables:
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
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.
41 # REPARTITION: forces repartitioning even if we detect the proper amount
42 # of partitions already exist.
44 # ROTATIONAL: forces to install onto hdds instead of sdds. normally sdds
45 # are chosen if they exist.
47 # PARTITION_PROMPT: command line prompt before partitioning
49 # RAID0: forces raid0 filesystem. Normally with 4+ devices, we use
52 if [[ $SPECIAL_DISK ]]; then
53 export CLASS_REPARTITION
=true
56 # # fai's setup-storage won't do btrfs on luks,
57 # # so we do it ourself :)
58 # inspiration taken from files in fai-setup-storage package
60 # if we are not running in fai, skiptask won't be defined, so carry on.
61 skiptask partition ||
! type skiptask
65 #### begin configuration
70 # ext partition so grub can write persistent variables,
71 # so it can do a one time boot. grub can't write to
72 # btrfs or any cow fs because it's more
73 # more complicated to do and they don't want to.
75 # bios boot partition,
76 # https://wiki.archlinux.org/index.php/GRUB
79 # this is larger than needed for several /boot subvols,
80 # becuase I keep a minimal debian install on it, for
81 # recovery needs, and for doing pxe-kexec.
85 ##### end configuration
88 add-part
() { # add partition suffix to $dev
90 if [[ $# == 1 ]]; then
97 if [[ $d == /dev
/disk
/by-id
/* ]]; then
105 bootdev
() { add-part $@
$bootn; }
106 rootdev
() { add-part $@
$rootn; }
107 swapdev
() { add-part $@
$swapn; }
108 grub_extdev
() { add-part $@
$grub_extn; }
109 bios_grubdev
() { add-part $@
$bios_grubn; }
111 crypt-dev
() { echo /dev
/mapper
/crypt_dev_
${1##*/}; }
112 crypt-name
() { echo crypt_dev_
${1##*/}; }
113 root-cryptdev
() { crypt-dev $
(rootdev $@
); }
114 swap-cryptdev
() { crypt-dev $
(swapdev $@
); }
115 root-cryptname
() { crypt-name $
(rootdev $@
); }
116 swap-cryptname
() { crypt-name $
(swapdev $@
); }
119 for f
in $FAI/distro-install-common
/devbyid \
120 /a
/bin
/fai
/fai
/config
/distro-install-common
/devbyid
; do
121 if [[ -e $f ]]; then $f "$@"; break; fi
126 ##### end function defs
128 if ifclass REPARTITION
;then
129 partition
=true
# force a full wipe
131 partition
=false
# change to true to force a full wipe
139 for disk
in [sv
]d
[a-z
]; do
140 case $
(cat $disk/queue
/rotational
) in
141 0) ssds
+=(/dev
/$disk) ;;
142 1) hdds
+=(/dev
/$disk) ;;
143 *) echo "$0: error: unknown /sys/block/$disk/queue/rotational: \
144 $(cat $disk/queue/rotational)"; exit 1 ;;
148 # install all ssds, or if there are none, all hdds.
149 # Note, usb flash disks are seen as rotational, which is
150 # very odd, but convenient for ignoring them here.
151 # TODO: find a reliable way to ignore them.
152 if ! ifclass ROTATIONAL
&& (( ${#ssds[@]} > 0 )); then
153 short_devs
=( ${ssds[@]} )
155 short_devs
=( ${hdds[@]} )
158 # check if the partitions exist have the right filesystems
159 #blkid="$(blkid -s TYPE)"
160 for dev
in ${short_devs[@]}; do
161 if $partition; then break; fi
162 y
=$
(readlink
-f $dev)
164 [[ ${#arr[@]} == "${lastn}" ]] || partition
=true
165 for (( i
=1; i
<= lastn
; i
++ )); do
166 [[ -e ${dev}$i ]] || partition
=true
168 # On one system, blkid is missing some partitions.
169 # maybe we need a flag, like FUZZY_BLKID or something, so we
170 # can check that at least some exist.
171 # for x in "`rootdev`: TYPE=\"crypto_LUKS\"" "`bootdev`: TYPE=\"btrfs\""; do
172 # echo "$blkid" | grep -Fx "$x" &>/dev/null || partition=true
176 if $partition && ifclass PARTITION_PROMPT
; then
177 echo "Press any key except ctrl-c to continue and partition these drives:"
178 echo " ${short_devs[*]}"
184 for short_dev
in ${short_devs[@]}; do
185 devs
+=($
(devbyid
$short_dev))
191 for dev
in ${devs[@]}; do
192 if ifclass frodo
; then
193 # I ran into a machine where the bios doesn't know about some disks,
194 # so 1st stage of grub also doesn't know about them.
195 # Also, grub does not support mounting degraded btrfs as far as
196 # I can tell with some googling.
197 # From within an arch install env, I could detect them by noting
198 # their partitions were mixed with the next disk in /dev/disk/by-path,
199 # and I have mixed model disks, and I could see the 8 models which showed
200 # up in the bios, and thus see which 2 models were missing.
201 # hdparm -I /dev/sdh will give model info in linux.
202 # However, in fai on jessie, /dev/disk/by-path dir doesn't exist,
203 # and I don't see another way, so I'm hardcoding them.
204 # We still put grub on them and partition them the same, for uniformity
205 # and in case they get moved to a system that can recognize them,
206 # we just exclude them from the boot filesystem.
209 for id
in ata-TOSHIBA_MD04ACA500_8539K4TQFS9A \
210 ata-TOSHIBA_MD04ACA500_Y5IFK6IJFS9A
; do
211 if [[ $
(readlink
-f $id) == "$(readlink -f $dev)" ]]; then
216 $bad_disk || boot_devs
+=(`bootdev`)
218 boot_devs
+=(`bootdev`)
220 if [[ $boot_devs && $first ]]; then
221 first_grub_extdev
=`grub_extdev`
226 if ifclass RAID0 ||
(( ${#boot_devs[@]} < 4 )); then
230 # need double the space if we are raid 10, and then
231 # might as well give some extra.
232 boot_mib
=$
((boot_mib
* 3))
237 if [[ ! $DISTRO ]]; then
238 if ifclass VOL_STRETCH_BOOTSTRAP
; then
239 DISTRO
=debianstretch_bootstrap
240 elif ifclass VOL_STRETCH
; then
242 elif ifclass VOL_TESTING
; then
244 elif ifclass VOL_XENIAL
; then
246 elif ifclass VOL_BELENOS
; then
247 DISTRO
=trisquelbelenos
248 elif ifclass VOL_FLIDAS
; then
249 DISTRO
=trisquelflidas
251 echo "PARTITIONER ERROR: no distro class/var set" >&2
255 first_boot_dev
=${boot_devs[0]}
258 bpart
() { # btrfs a partition
260 0) mkfs.btrfs
-f $@
;;
261 10) mkfs.btrfs
-f -m raid10
-d raid10 $@
;;
266 # keyfiles generated like:
267 # head -c 2048 /dev/urandom | od | s dd of=/q/root/luks/host-demohost
268 luks_dir
=${LUKS_DIR:-/var/lib/fai/config/distro-install-common/luks}
270 if [[ ! -e $luks_dir/host-
$HOSTNAME ]]; then
271 echo "$0: error: no key for hostname at $luks_dir/host-$HOSTNAME" >&2
275 lukspw
=$
(cat $luks_dir/iank
)
276 # # ian: disabled by chaning to tpnew while I use the tp host.
277 # # note, corresponding changes in /b/ds/keyscript-{on,off}
278 if ifclass tpnew
; then
279 lukspw
=$
(cat $luks_dir/traci
)
281 if ifclass demohost
; then
286 first_root_crypt
=$
(root-cryptdev
${devs[0]})
288 # 1.5 x based on https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-partitioning-setup-x86.html#sect-custom-partitioning-x86
289 swap_mib
=$
(( $
(grep ^MemTotal
: /proc
/meminfo | \
290 awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1024 ))
294 for dev
in ${devs[@]}; do
295 root_devs
+=(`rootdev`)
301 if [[ ! $SPECIAL_DISK ]]; then
302 for dev
in ${devs[@]}; do
303 # if we repartition to the same as an old partition,
304 # we don't want any old fses hanging around.
305 for (( i
=1; i
<= lastn
; i
++ )); do
306 x
=$
(add-part
$dev $i)
307 [[ -e $x ]] ||
continue
309 # wipefs has failed, manual run works, google suggests timing issue
310 while ! wipefs
-a $x; do
312 count_down
=$
((count_down
- 1))
313 (( count_down
> 0 )) ||
exit 1
320 for dev
in ${devs[@]}; do
321 if [[ $SPECIAL_DISK ]]; then
322 dev
=$
(devbyid
$SPECIAL_DISK)
325 # parted will round up the disk size. Do -1 so we can have
326 # fully 1MiB unit partitions for easy resizing of the last partition.
327 # Otherwise we would pass in -0 for the end argument for the last partition.
329 # Note: parted print error output is expected. example:
330 # Error: /dev/vda: unrecognised disk label
331 disk_mib
=$
(( $
(parted
-m $dev unit MiB print | \
332 sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
333 root_end
=$
(( disk_mib
- swap_mib
- boot_mib
/ ${#boot_devs[@]} ))
334 swap_end
=$
(( root_end
+ swap_mib
))
336 parted
-s $dev mklabel gpt
337 # MiB because parted complains about alignment otherwise.
338 pcmd
="parted -a optimal -s -- $dev"
339 $pcmd mkpart primary ext3
12MiB
${root_end}MiB
340 # without naming, systemd gives us misc errors like:
341 # dev-disk-by\x2dpartlabel-primary.device: Dev dev-disk-by\x2dpartlabel-primary.device appeared twice
342 $pcmd name
$rootn root
343 # normally a swap is type "linux-swap", but this is encrypted swap. using that
344 # label will confuse systemd.
345 $pcmd mkpart primary
"" ${root_end}MiB
${swap_end}MiB
346 $pcmd name
$swapn swap
347 $pcmd mkpart primary
"" ${swap_end}MiB
${disk_mib}MiB
348 $pcmd name
$bootn boot
349 # i only need a few k, but googling min size,
350 # I found someone saying that gparted required
351 # required at least 8 because of their hard drive cylinder size.
352 # And 8 is still very tiny.
353 $pcmd mkpart primary
"ext2" 4MiB
12MiB
354 $pcmd name
$grub_extn grubext
355 # gpt ubuntu cloud image uses ~4 mb for this partition. fai uses 1 MiB.
356 # so, I use 3, whatever.
357 # note: parted manual saying cheap flash media
358 # should to start at 4.
359 $pcmd mkpart primary
"" 1MiB
4MiB
360 $pcmd name
$bios_grubn biosgrub
361 $pcmd set $bios_grubn bios_grub on
362 $pcmd set $bootn boot on
# generally not needed on modern systems
363 # the mkfs failed before on a vm, which prompted me to add
365 # then it failed again on a physical machine
367 # Device /dev/disk/by-id/foo doesn't exist or access denied,
368 # so I added a wait until it existed.
369 # Then I added the mkfs.ext2, which claimed to succeed,
370 # but then couldn't be found upon reboot. In that case we didn't
371 # wait at all. So I've added a 3 second minimum wait.
374 while [[ ! -e `rootdev` ]] && (( secs
< 10 )); do
378 # Holds just a single file, rarely written, so
379 # use ext2, like was often used for the /boot partition.
380 # This exists because grub can only persist data to a non-cow fs.
381 # And we use persisting a var in grub to do a one time boot.
382 # We could pass the data on the kernel command line and persist it
383 # to grubenv after booting, but that relies on the boot always succeeding.
384 # This is just a bit more robust, and it could work for booting
385 # into ipxe which can't persist data, if we ever got that working.
386 mkfs.ext2
`grub_extdev`
387 yes YES | cryptsetup luksFormat
`rootdev` $luks_dir/host-
$HOSTNAME \
388 -c aes-cbc-essiv
:sha256
-s 256 ||
[[ $?
== 141 ]]
390 cryptsetup luksAddKey
--key-file $luks_dir/host-
$HOSTNAME \
391 `rootdev` ||
[[ $?
== 141 ]]
392 # background: Keyfile and password are treated just
393 # like 2 ways to input a passphrase, so we don't actually need to have
394 # different contents of keyfile and passphrase, but it makes some
395 # security sense to a really big randomly generated passphrase
396 # as much as possible, so we have both.
398 # This would remove the keyfile.
399 # yes 'test' | cryptsetup luksRemoveKey /dev/... \
400 # /key/file || [[ $? == 141 ]]
402 cryptsetup luksOpen
`rootdev` `root-cryptname` \
403 --key-file $luks_dir/host-
$HOSTNAME
405 if [[ $SPECIAL_DISK ]]; then
409 ls -la /dev
/btrfs-control
# this was probably for debugging...
411 bpart $
(for dev
in ${devs[@]}; do root-cryptdev
; done)
412 bpart
${boot_devs[@]}
414 for dev
in ${devs[@]}; do
415 mkfs.ext2
`grub_extdev`
416 cryptsetup luksOpen
`rootdev` `root-cryptname` \
417 --key-file $luks_dir/host-
$HOSTNAME
423 if [[ $DISTRO != debianstretch_bootstrap
]]; then
424 # bootstrap distro doesn't use separate encrypted root.
425 mount
-o subvolid
=0 $first_root_crypt /mnt
426 # systemd creates subvolumes we want to delete.
427 s
=($
(btrfs subvolume list
--sort=-path /mnt |
428 sed -rn "s#^.*path\s*(root_$DISTRO/\S+)\s*\$#\1#p"))
429 for subvol
in ${s[@]}; do btrfs subvolume delete
/mnt
/$subvol; done
430 btrfs subvolume set-default
0 /mnt
431 [[ ! -e /mnt
/root_
$DISTRO ]] || btrfs subvolume delete
/mnt
/root_
$DISTRO
436 btrfs subvolume create root_
$DISTRO
438 mkdir
-p /mnt
/root_
$DISTRO/boot
439 # could set default subvol like this, but no reason to.
440 # btrfs subvolume set-default \
441 # $(btrfs subvolume list . | grep "root_$DISTRO$" | awk '{print $2}') .
443 # no cow on the root filesystem. it's setup is fully scripted,
444 # if it's messed up, we will just recreated it,
445 # and we can get better perf with this.
446 # I can't remember exactly why, but this is preferable to mounting with
447 # -o nodatacow, I think because subvolumes inherit that.
448 chattr -Rf +C root_
$DISTRO
453 mount
-o subvolid
=0 $first_boot_dev /mnt
455 btrfs subvolume set-default
0 /mnt
# already default, just ensuring it.
457 # for libreboot systems. grub2 only reads from subvolid=0
459 cp $FAI/distro-install-common
/libreboot_grub.cfg
/mnt
/grub2
461 if [[ $DISTRO == debianstretch_bootstrap
]]; then
462 # this is just convenience for the libreboot_grub config
463 # so we can glob the other ones easier.
466 boot_vol
=boot_
$DISTRO
468 [[ ! -e /mnt
/$boot_vol ]] || btrfs subvolume delete
/mnt
/$boot_vol
469 btrfs subvolume create
$boot_vol
472 ## end create subvols ##
475 mount
$first_grub_extdev /mnt
476 grub-editenv
/mnt
/grubenv
set did_fai_check
=true
477 grub-editenv
/mnt
/grubenv
set last_boot
=/$boot_vol
480 if [[ $DISTRO == debianstretch_bootstrap
]]; then
481 cat > /tmp
/fai
/fstab
<<EOF
482 $first_boot_dev / btrfs noatime,subvol=$boot_vol 0 0
484 cat >/tmp
/fai
/disk_var.sh
<<EOF
485 BOOT_DEVICE="${short_devs[@]}"
486 ROOT_PARTITION=$first_boot_dev
489 # note, fai creates the mountpoints listed here
490 cat > /tmp
/fai
/fstab
<<EOF
491 $first_root_crypt / btrfs noatime,subvol=root_$DISTRO 0 0
492 $first_root_crypt /mnt/root btrfs noatime,subvolid=0 0 0
493 $first_boot_dev /boot btrfs noatime,subvol=$boot_vol 0 0
496 for dev
in ${devs[@]}; do
497 swaps
+=(`swap-cryptname`)
498 cat >>/tmp
/fai
/crypttab
<<EOF
499 `root-cryptname` `rootdev` none keyscript=/root/keyscript,discard,luks
500 `swap-cryptname` `swapdev` /dev/urandom swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
502 cat >> /tmp
/fai
/fstab
<<EOF
503 `swap-cryptdev` none swap sw 0 0
508 #BOOT_DEVICE=\${BOOT_DEVICE:-"${devs[0]}"}
510 # note: swaplist seems to do nothing.
511 cat >/tmp
/fai
/disk_var.sh
<<EOF
512 BOOT_DEVICE="${short_devs[@]}"
513 BOOT_PARTITION=\${BOOT_PARTITION:-$first_boot_dev}
514 # ROOT_PARTITIONS is added by me, used in arch setup.
515 ROOT_PARTITIONS="${root_devs[@]}"
516 ROOT_PARTITION=\${ROOT_PARTITION:-$first_root_crypt}
517 SWAPLIST=\${SWAPLIST:-"${swaps[@]}"}