X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=fai%2Fconfig%2Fhooks%2Fpartition.DEFAULT;h=2db69b348b33f8f8e2c99c66112056f443f54b89;hb=bdcc37dee90597b4a65c2ae24b9fc26f15adfc11;hp=e64f92b7d58d875daf1c3c77f7313fc979ec04a3;hpb=81e0e0b826ebffdee7d809ee4dff1338af7692e1;p=automated-distro-installer diff --git a/fai/config/hooks/partition.DEFAULT b/fai/config/hooks/partition.DEFAULT index e64f92b..2db69b3 100755 --- a/fai/config/hooks/partition.DEFAULT +++ b/fai/config/hooks/partition.DEFAULT @@ -1,10 +1,27 @@ #!/bin/bash -x +# Copyright (C) 2016 Ian Kelling + +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. set -eE -o pipefail trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR # # fai's setup-storage won't do btrfs on luks, # # so we do it ourself :) +# inspiration taken from files in fai-setup-storage package + skiptask partition || ! type skiptask # for running not in fai @@ -13,14 +30,25 @@ skiptask partition || ! type skiptask # for running not in fai rootn=1 swapn=2 bootn=3 -bios_grubn=4 -boot_mib=1500 +# ext partition so grub can write persistent variables, +# so it can do a one time boot. grub can't write to +# btrfs or any cow fs because it's more +# more complicated to do and they don't want to. +grub_extn=4 +# bios boot partition, +# https://wiki.archlinux.org/index.php/GRUB +bios_grubn=5 +lastn=$bios_grubn +# this is larger than needed for several /boot subvols, +# becuase I keep a minimal debian install on it, for +# recovery needs, and for doing pxe-kexec. +boot_mib=10000 ##### end configuration -add-part() { +add-part() { # add partition suffix to $dev local d ret if [[ $# == 1 ]]; then d=$dev @@ -40,6 +68,7 @@ add-part() { bootdev() { add-part $@ $bootn; } rootdev() { add-part $@ $rootn; } swapdev() { add-part $@ $swapn; } +grub_extdev() { add-part $@ $grub_extn; } bios_grubdev() { add-part $@ $bios_grubn; } crypt-dev() { echo /dev/mapper/crypt_dev_${1##*/}; } @@ -58,7 +87,6 @@ else partition=false # change to true to force a full wipe fi -lastn=$bios_grubn hdds=() @@ -74,7 +102,7 @@ $(cat $disk/queue/rotational)"; exit 1 ;; done # install all ssds, or if there are none, all hdds -if (( ${#ssds[@]} > 0 )); then +if ! ifclass ROTATIONAL && (( ${#ssds[@]} > 0 )); then short_devs=( ${ssds[@]} ) else short_devs=( ${hdds[@]} ) @@ -83,10 +111,10 @@ fi # check if the partitions exist have the right filesystems #blkid="$(blkid -s TYPE)" for dev in ${short_devs[@]}; do - ! $partition || break + if $partition; then break; fi y=$(readlink -f $dev) - x=($y[0-9]) - [[ ${#x[@]} == "${lastn}" ]] || partition=true + arr=($y[0-9]) + [[ ${#arr[@]} == "${lastn}" ]] || partition=true for (( i=1; i <= lastn; i++ )); do [[ -e ${dev}$i ]] || partition=true done @@ -100,8 +128,8 @@ done if $partition && ifclass PARTITION_PROMPT; then echo "Press any key except ctrl-c to continue and partition these drives:" - echo " ${short_devs[@]}" - read + echo " ${short_devs[*]}" + read -r fi devs=() @@ -111,7 +139,7 @@ for short_dev in ${short_devs[@]}; do done - +first=false boot_devs=() for dev in ${devs[@]}; do if ifclass frodo; then @@ -142,33 +170,49 @@ for dev in ${devs[@]}; do else boot_devs+=(`bootdev`) fi + if [[ $boot_devs && $first ]]; then + first_grub_extdev=`grub_extdev` + first=false + fi done +if ifclass RAID0 || (( ${#boot_devs[@]} < 4 )); then + raid_level=0 +else + raid_level=10 + # need double the space if we are raid 10, and then + # might as well give some extra. + boot_mib=$((boot_mib * 3)) +fi + + + if [[ ! $DISTRO ]]; then - if ifclass STABLE; then + if ifclass VOL_STABLE_BOOTSTRAP; then + DISTRO=debianstable_bootstrap + elif ifclass VOL_STRETCH; then + DISTRO=debiantesting + elif ifclass VOL_STABLE; then DISTRO=debianstable + elif ifclass VOL_XENIAL; then + DISTRO=ubuntuxenial + elif ifclass VOL_BELENOS; then + DISTRO=trisquelbelenos else - DISTRO=debiantesting + echo "PARTITIONER ERROR: no distro class/var set" >&2 + exit 1 fi fi - - - -case ${#boot_devs[@]} in - # need double the space if we are raid 10, and then - # might as well give some extra overhead. - [4-9]*|[1-3]?*) boot_mib=$((boot_mib * 3)) ;; -esac +first_boot_dev=${boot_devs[0]} bpart() { # btrfs a partition - case ${#@} in - [1-3]) mkfs.btrfs -f $@ ;; - [4-9]*|[1-3]?*) mkfs.btrfs -f -m raid10 -d raid10 $@ ;; + case $raid_level in + 0) mkfs.btrfs -f $@ ;; + 10) mkfs.btrfs -f -m raid10 -d raid10 $@ ;; esac } -first_boot_dev=${boot_devs[0]} # keyfiles generated like: # head -c 2048 /dev/urandom | od | s dd of=/q/root/luks/host-demohost @@ -191,7 +235,6 @@ fi first_root_crypt=$(root-cryptdev ${devs[0]}) -bios_grubn=4 # 1.5 x based on https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-partitioning-setup-x86.html#sect-custom-partitioning-x86 swap_mib=$(( $(grep ^MemTotal: /proc/meminfo | \ awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1024 )) @@ -204,7 +247,11 @@ done shopt -s nullglob if $partition; then for dev in ${devs[@]}; do - for x in $dev[0-9]; do + # if we repartition to the same as an old partition, + # we don't want any old fses hanging around. + for (( i=1; i <= lastn; i++ )); do + x=$(add-part $dev $i) + [[ -e $x ]] || continue count_down=10 # wipefs has failed, manual run works, google suggests timing issue while ! wipefs -a $x; do @@ -227,28 +274,47 @@ if $partition; then swap_end=$(( root_end + swap_mib)) parted -s $dev mklabel gpt - # gpt ubuntu cloud image uses ~4. fai uses 1 MiB. - # I read something in the parted manual saying cheap flash media - # likes to start at 4. # MiB because parted complains about alignment otherwise. pcmd="parted -a optimal -s -- $dev" - $pcmd mkpart primary "ext3" 4MiB ${root_end}MiB + $pcmd mkpart primary "ext3" 12MiB ${root_end}MiB $pcmd mkpart primary "linux-swap" ${root_end}MiB ${swap_end}MiB $pcmd mkpart primary "" ${swap_end}MiB ${disk_mib}MiB + # i only need a few k, but googling min size, + # I found someone saying that gparted required + # required at least 8 because of their hard drive cylinder size. + # And 8 is still very tiny. + $pcmd mkpart primary "ext2" 4MiB 12MiB + # gpt ubuntu cloud image uses ~4 mb for this partition. fai uses 1 MiB. + # so, I use 3, whatever. + # note: parted manual saying cheap flash media + # should to start at 4. $pcmd mkpart primary "" 1MiB 4MiB $pcmd set $bios_grubn bios_grub on $pcmd set $bootn boot on # generally not needed on modern systems # the mkfs failed before on a vm, which prompted me to add # sleep .1 - # then failed on a physical machine + # then it failed again on a physical machine # with: # Device /dev/disk/by-id/foo doesn't exist or access denied, - # so here we wait. + # so I added a wait until it existed. + # Then I added the mkfs.ext2, which claimed to succeed, + # but then couldn't be found upon reboot. In that case we didn't + # wait at all. So I've added a 3 second minimum wait. + sleep 3 secs=0 while [[ ! -e `rootdev` ]] && (( secs < 10 )); do sleep 1 secs=$((secs +1)) done + # Holds just a single file, rarely written, so + # use ext2, like was often used for the /boot partition. + # This exists because grub can only persist data to a non-cow fs. + # And we use persisting a var in grub to do a one time boot. + # We could pass the data on the kernel command line and persist it + # to grubenv after booting, but that relies on the boot always succeeding. + # This is just a bit more robust, and it could work for booting + # into ipxe which can't persist data, if we ever got that working. + mkfs.ext2 `grub_extdev` yes YES | cryptsetup luksFormat `rootdev` $luks_dir/host-$HOSTNAME \ -c aes-cbc-essiv:sha256 -s 256 || [[ $? == 141 ]] yes "$lukspw" | \ @@ -267,95 +333,114 @@ if $partition; then cryptsetup luksOpen `rootdev` `root-cryptname` \ --key-file $luks_dir/host-$HOSTNAME done - ls -la /dev/btrfs-control + ls -la /dev/btrfs-control # this was probably for debugging... sleep 1 bpart $(for dev in ${devs[@]}; do root-cryptdev; done) bpart ${boot_devs[@]} else for dev in ${devs[@]}; do + mkfs.ext2 `grub_extdev` cryptsetup luksOpen `rootdev` `root-cryptname` \ --key-file $luks_dir/host-$HOSTNAME done sleep 1 fi -mount -o subvolid=0 $first_root_crypt /mnt -# systemd creates subvolumes we want to delete. -s=($(btrfs subvolume list --sort=-path /mnt | - sed -rn "s#^.*path\s*(root_$DISTRO/\S+)\s*\$#\1#p")) -for subvol in ${s[@]}; do btrfs subvolume delete /mnt/$subvol; done -btrfs subvolume set-default 0 /mnt -[[ ! -e /mnt/root_$DISTRO ]] || btrfs subvolume delete /mnt/root_$DISTRO +if [[ $DISTRO != debianstable_bootstrap ]]; then + # bootstrap distro doesn't use separate encrypted root. + mount -o subvolid=0 $first_root_crypt /mnt + # systemd creates subvolumes we want to delete. + s=($(btrfs subvolume list --sort=-path /mnt | + sed -rn "s#^.*path\s*(root_$DISTRO/\S+)\s*\$#\1#p")) + for subvol in ${s[@]}; do btrfs subvolume delete /mnt/$subvol; done + btrfs subvolume set-default 0 /mnt + [[ ! -e /mnt/root_$DISTRO ]] || btrfs subvolume delete /mnt/root_$DISTRO + + ## create subvols ## + cd /mnt + + btrfs subvolume create root_$DISTRO + + mkdir -p /mnt/root_$DISTRO/boot + # could set default subvol like this, but no reason to. + # btrfs subvolume set-default \ + # $(btrfs subvolume list . | grep "root_$DISTRO$" | awk '{print $2}') . + + # no cow on the root filesystem. it's setup is fully scripted, + # if it's messed up, we will just recreated it, + # and we can get better perf with this. + # I can't remember exactly why, but this is preferable to mounting with + # -o nodatacow, I think because subvolumes inherit that. + chattr -Rf +C root_$DISTRO + cd / + umount /mnt +fi -## create subvols ## +mount -o subvolid=0 $first_boot_dev /mnt cd /mnt -for x in q home_$DISTRO root_$DISTRO; do - btrfs subvolume list . | grep "$x$" >/dev/null || btrfs subvolume create $x -done -chown root:1000 q +btrfs subvolume set-default 0 /mnt # already default, just ensuring it. +# for libreboot systems. grub2 only reads from subvolid=0 +mkdir -p /mnt/grub2 +cp $FAI/distro-install-common/libreboot_grub.cfg /mnt/grub2 -mkdir -p /mnt/root_$DISTRO/boot -for x in root/a q/a; do - mkdir -p $x - chown 1000:1000 $x - chmod 755 $x -done -# could set default like this, but no reason to. -# btrfs subvolume set-default \ - # $(btrfs subvolume list . | grep "root_$DISTRO$" | awk '{print $2}') . -chattr -Rf +C root_$DISTRO -cd / -umount /mnt -mount -o subvolid=0 $first_boot_dev /mnt -cd /mnt -btrfs subvolume set-default 0 /mnt -[[ ! -e /mnt/boot_$DISTRO ]] || btrfs subvolume delete /mnt/boot_$DISTRO -btrfs subvolume create boot_$DISTRO +if [[ $DISTRO == debianstable_bootstrap ]]; then + # this is just convenience for the libreboot_grub config + # so we can glob the other ones easier. + boot_vol=$DISTRO +else + boot_vol=boot_$DISTRO +fi +[[ ! -e /mnt/$boot_vol ]] || btrfs subvolume delete /mnt/$boot_vol +btrfs subvolume create $boot_vol cd / umount /mnt ## end create subvols ## +dev=${boot_devs[0]} +mount $first_grub_extdev /mnt +grub-editenv /mnt/grubenv set did_fai_check=true +grub-editenv /mnt/grubenv set last_boot=/$boot_vol +umount /mnt - -cat > /tmp/fai/fstab < /tmp/fai/fstab <> /tmp/fai/fstab <<'EOF' -UUID=3f7b31cd-f299-40b4-a86b-7604282e2715 /i btrfs noatime 0 2 + cat >/tmp/fai/disk_var.sh <>/tmp/fai/crypttab < /tmp/fai/fstab <>/tmp/fai/crypttab <> /tmp/fai/fstab <> /tmp/fai/fstab </tmp/fai/disk_var.sh </tmp/fai/disk_var.sh <