X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=fai%2Fconfig%2Fhooks%2Fpartition.DEFAULT;h=7a1967b2268b002bb3f76d8a734df652db99d6f8;hb=5f680f6bea2faae10ca8e5ccea0d08d18ccc9aa1;hp=aa7440968b8eaca3cde4c43672a69ad5825441c0;hpb=1d331faf4f315ae3356ceecb648170d3d74473df;p=automated-distro-installer diff --git a/fai/config/hooks/partition.DEFAULT b/fai/config/hooks/partition.DEFAULT index aa74409..7a1967b 100755 --- a/fai/config/hooks/partition.DEFAULT +++ b/fai/config/hooks/partition.DEFAULT @@ -1,26 +1,91 @@ #!/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 +# for calling outside of FAI, first +# source /a/bin/fai-wrapper +# then to set classes with: fai-setclass OPT1... +# which sets CLASS_OPT1=true... +# +# OPTIONS: +# +# environment variables: +# +# HOSTNAME: if frodo, we exclude 2 devices from the /boot array, which +# the bios does not see. if demohost, we set the luks password to just +# 'x'. +# +# SPECIAL_DISK: For use outside of fai. A base disk name like +# /dev/sdk. If set, we just cryptsetup and partition this one disk then +# exit. This is useful for partitioning a disk in preparation to replace +# a failed or failing disk from a raid10 array. +# +# classes: +# +# REPARTITION: forces repartitioning even if we detect the proper amount +# of partitions already exist. +# +# ROTATIONAL: forces to install onto hdds instead of sdds. normally sdds +# are chosen if they exist. +# +# PARTITION_PROMPT: command line prompt before partitioning +# +# RAID0: forces raid0 filesystem. Normally with 4+ devices, we use +# raid10. + +if [[ $SPECIAL_DISK ]]; then + export CLASS_REPARTITION=true +fi + # # fai's setup-storage won't do btrfs on luks, # # so we do it ourself :) +# inspiration taken from files in fai-setup-storage package + +# if we are not running in fai, skiptask won't be defined, so carry on. +skiptask partition || ! type skiptask + -skiptask partition || ! type skiptask # for running not in fai #### begin configuration rootn=1 swapn=2 bootn=3 -bios_grubn=4 -boot_mib=1500 +# ext partition so grub can write persistent variables, +# so it can do a one time boot. grub can't write to +# btrfs or any cow fs because it's more +# more complicated to do and they don't want to. +grub_extn=4 +# bios boot partition, +# https://wiki.archlinux.org/index.php/GRUB +bios_grubn=5 +lastn=$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 +105,7 @@ 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##*/}; } @@ -48,7 +114,14 @@ root-cryptdev() { crypt-dev $(rootdev $@); } swap-cryptdev() { crypt-dev $(swapdev $@); } root-cryptname() { crypt-name $(rootdev $@); } swap-cryptname() { crypt-name $(swapdev $@); } +devbyid() { + local f + for f in $FAI/distro-install-common/devbyid \ + /a/bin/fai/fai/config/distro-install-common/devbyid; do + if [[ -e $f ]]; then $f "$@"; break; fi + done +} ##### end function defs @@ -58,7 +131,6 @@ else partition=false # change to true to force a full wipe fi -lastn=$bios_grubn hdds=() @@ -74,7 +146,7 @@ $(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=( ${hdds[@]} ) @@ -83,10 +155,10 @@ fi # check if the partitions exist have the right filesystems #blkid="$(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 +172,8 @@ 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 +183,7 @@ for short_dev in ${short_devs[@]}; do done - +first=false boot_devs=() for dev in ${devs[@]}; do if ifclass frodo; then @@ -142,33 +214,51 @@ 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 [[ ! $DISTRO ]]; then - if ifclass STABLE; then - DISTRO=debianstable - else - DISTRO=debiantesting - fi +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 -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 +if [[ ! $DISTRO ]]; then + if ifclass VOL_STRETCH_BOOTSTRAP; then + DISTRO=debianstretch_bootstrap + elif ifclass VOL_STRETCH; then + DISTRO=debianstretch + elif ifclass VOL_TESTING; then + DISTRO=debiantesting + elif ifclass VOL_XENIAL; then + DISTRO=ubuntuxenial + elif ifclass VOL_BELENOS; then + DISTRO=trisquelbelenos + elif ifclass VOL_FLIDAS; then + DISTRO=trisquelflidas + else + echo "PARTITIONER ERROR: no distro class/var set" >&2 + exit 1 + fi +fi +first_boot_dev=${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 @@ -179,11 +269,11 @@ if [[ ! -e $luks_dir/host-$HOSTNAME ]]; then exit 1 fi -if ifclass tp; then - lukspw=$(cat $luks_dir/traci) -else - lukspw=$(cat $luks_dir/ian) -fi +lukspw=$(cat $luks_dir/iank) +# # ian: disabled while I use the tp host. +# if ifclass tp; then +# lukspw=$(cat $luks_dir/traci) +# fi if ifclass demohost; then lukspw=x fi @@ -191,7 +281,6 @@ fi first_root_crypt=$(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 )) @@ -203,23 +292,37 @@ for dev in ${devs[@]}; do done shopt -s nullglob if $partition; then - for dev in ${devs[@]}; do - for x in $dev[0-9]; do - count_down=10 - # wipefs has failed, manual run works, google suggests timing issue - while ! wipefs -a $x; do - sleep 2 - count_down=$((count_down - 1)) - (( count_down > 0 )) || exit 1 + + ### begin wipefs + if [[ ! $SPECIAL_DISK ]]; then + for dev in ${devs[@]}; do + # if we repartition to the same as an old partition, + # we don't want any old fses hanging around. + for (( i=1; i <= lastn; i++ )); do + x=$(add-part $dev $i) + [[ -e $x ]] || continue + count_down=10 + # wipefs has failed, manual run works, google suggests timing issue + while ! wipefs -a $x; do + sleep 2 + count_down=$((count_down - 1)) + (( count_down > 0 )) || exit 1 + done done done - done + fi + ### end wipefs + for dev in ${devs[@]}; do + if [[ $SPECIAL_DISK ]]; then + dev=$(devbyid $SPECIAL_DISK) + fi + # parted will round up the disk size. Do -1 so we can have # fully 1MiB unit partitions for easy resizing of the last partition. # Otherwise we would pass in -0 for the end argument for the last partition. # - # parted print error output is expected. example: + # Note: parted print error output is expected. example: # Error: /dev/vda: unrecognised disk label disk_mib=$(( $(parted -m $dev unit MiB print | \ sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1)) @@ -227,28 +330,56 @@ 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 "linux-swap" ${root_end}MiB ${swap_end}MiB + $pcmd mkpart primary ext3 12MiB ${root_end}MiB + # without naming, systemd gives us misc errors like: + # dev-disk-by\x2dpartlabel-primary.device: Dev dev-disk-by\x2dpartlabel-primary.device appeared twice + $pcmd name $rootn root + # normally a swap is type "linux-swap", but this is encrypted swap. using that + # label will confuse systemd. + $pcmd mkpart primary "" ${root_end}MiB ${swap_end}MiB + $pcmd name $swapn swap $pcmd mkpart primary "" ${swap_end}MiB ${disk_mib}MiB + $pcmd name $bootn boot + # 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 + $pcmd name $grub_extn grubext + # 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 name $bios_grubn biosgrub $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" | \ @@ -266,98 +397,119 @@ if $partition; then cryptsetup luksOpen `rootdev` `root-cryptname` \ --key-file $luks_dir/host-$HOSTNAME + + if [[ $SPECIAL_DISK ]]; then + exit 0 + fi 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 -## create subvols ## -cd /mnt -btrfs subvolume create root_$DISTRO -[[ -e q ]] || btrfs subvolume create q -chown root:1000 q - -mkdir -p /mnt/root_$DISTRO/boot -for x in q/a q/i; 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 +if [[ $DISTRO != debianstretch_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 + 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 +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 + +if [[ $DISTRO == debianstretch_bootstrap ]]; then + # this is just convenience for the libreboot_grub config + # so we can glob the other ones easier. + boot_vol=$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 -# note, the mount point /a seems to get automatically created somewhere -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/fstab <<'EOF' -/q/i /i none bind 0 0 +else + # note, fai creates the mountpoints listed here + cat > /tmp/fai/fstab <>/tmp/fai/crypttab <>/tmp/fai/crypttab <> /tmp/fai/fstab <> /tmp/fai/fstab </tmp/fai/disk_var.sh </tmp/fai/disk_var.sh <