#!/bin/bash -x 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 :) skiptask partition || ! type skiptask # for running not in fai #### begin configuration rootn=1 swapn=2 bootn=3 bios_grubn=4 boot_mib=1500 ##### end configuration add-part() { local d ret if [[ $# == 1 ]]; then d=$dev part=$1 else d=$1 part=$2 fi if [[ $d == /dev/disk/by-id/* ]]; then ret=$d-part$part else ret=$d$part fi echo $ret } bootdev() { add-part $@ $bootn; } rootdev() { add-part $@ $rootn; } swapdev() { add-part $@ $swapn; } bios_grubdev() { add-part $@ $bios_grubn; } crypt-dev() { echo /dev/mapper/crypt_dev_${1##*/}; } crypt-name() { echo crypt_dev_${1##*/}; } root-cryptdev() { crypt-dev $(rootdev $@); } swap-cryptdev() { crypt-dev $(swapdev $@); } root-cryptname() { crypt-name $(rootdev $@); } swap-cryptname() { crypt-name $(swapdev $@); } ##### end function defs if ifclass REPARTITION;then partition=true # force a full wipe else partition=false # change to true to force a full wipe fi lastn=$bios_grubn hdds=() ssds=() cd /sys/block for disk in [sv]d[a-z]; do case $(cat $disk/queue/rotational) in 0) ssds+=(/dev/$disk) ;; 1) hdds+=(/dev/$disk) ;; *) echo "$0: error: unknown /sys/block/$disk/queue/rotational: \ $(cat $disk/queue/rotational)"; exit 1 ;; esac done # install all ssds, or if there are none, all hdds if (( ${#ssds[@]} > 0 )); then short_devs=( ${ssds[@]} ) else short_devs=( ${hdds[@]} ) fi # check if the partitions exist have the right filesystems #blkid="$(blkid -s TYPE)" for dev in ${short_devs[@]}; do ! $partition || break y=$(readlink -f $dev) x=($y[0-9]) [[ ${#x[@]} == "${lastn}" ]] || partition=true for (( i=1; i <= lastn; i++ )); do [[ -e ${dev}$i ]] || partition=true done # On one system, blkid is missing some partitions. # maybe we need a flag, like FUZZY_BLKID or something, so we # can check that at least some exist. # for x in "`rootdev`: TYPE=\"crypto_LUKS\"" "`bootdev`: TYPE=\"btrfs\""; do # echo "$blkid" | grep -Fx "$x" &>/dev/null || partition=true # done done if $partition && ifclass PARTITION_PROMPT; then echo "Press any key except ctrl-c to continue and partition these drives:" echo " ${short_devs[@]}" read fi devs=() shopt -s extglob for short_dev in ${short_devs[@]}; do devs+=($(devbyid $short_dev)) done boot_devs=() for dev in ${devs[@]}; do if ifclass frodo; then # I ran into a machine where the bios doesn't know about some disks, # so 1st stage of grub also doesn't know about them. # Also, grub does not support mounting degraded btrfs as far as # I can tell with some googling. # From within an arch install env, I could detect them by noting # their partitions were mixed with the next disk in /dev/disk/by-path, # and I have mixed model disks, and I could see the 8 models which showed # up in the bios, and thus see which 2 models were missing. # hdparm -I /dev/sdh will give model info in linux. # However, in fai on jessie, /dev/disk/by-path dir doesn't exist, # and I don't see another way, so I'm hardcoding them. # We still put grub on them and partition them the same, for uniformity # and in case they get moved to a system that can recognize them, # we just exclude them from the boot filesystem. cd /dev/disk/by-id/ bad_disk=false for id in ata-TOSHIBA_MD04ACA500_8539K4TQFS9A \ ata-TOSHIBA_MD04ACA500_Y5IFK6IJFS9A; do if [[ $(readlink -f $id) == "$(readlink -f $dev)" ]]; then bad_disk=true break fi done $bad_disk || boot_devs+=(`bootdev`) else boot_devs+=(`bootdev`) fi done if [[ ! $DISTRO ]]; then if ifclass STABLE; then DISTRO=debianstable else DISTRO=debiantesting 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 bpart() { # btrfs a partition case ${#@} in [1-3]) mkfs.btrfs -f $@ ;; [4-9]*|[1-3]?*) 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 luks_dir=${LUKS_DIR:-/var/lib/fai/config/distro-install-common/luks} if [[ ! -e $luks_dir/host-$HOSTNAME ]]; then echo "$0: error: no key for hostname at $luks_dir/host-$HOSTNAME" >&2 exit 1 fi if ifclass tp; then lukspw=$(cat $luks_dir/traci) else lukspw=$(cat $luks_dir/ian) fi if ifclass demohost; then lukspw=x fi first_root_crypt=$(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 )) mkdir -p /tmp/fai root_devs=() for dev in ${devs[@]}; do root_devs+=(`rootdev`) 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 done done done for dev in ${devs[@]}; do # parted will round up the disk size. Do -1 so we can have # fully 1MiB unit partitions for easy resizing of the last partition. # Otherwise we would pass in -0 for the end argument for the last partition. # # parted print error output is expected. example: # Error: /dev/vda: unrecognised disk label disk_mib=$(( $(parted -m $dev unit MiB print | \ sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1)) root_end=$(( disk_mib - swap_mib - boot_mib / ${#boot_devs[@]} )) swap_end=$(( 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 "" ${swap_end}MiB ${disk_mib}MiB $pcmd mkpart primary "" 1MiB 4MiB $pcmd set $bios_grubn bios_grub on $pcmd set $bootn boot on # generally not needed on modern systems # the mkfs failed before on a vm, which prompted me to add # sleep .1 # then failed on a physical machine # with: # Device /dev/disk/by-id/foo doesn't exist or access denied, # so here we wait. secs=0 while [[ ! -e `rootdev` ]] && (( secs < 10 )); do sleep 1 secs=$((secs +1)) done yes YES | cryptsetup luksFormat `rootdev` $luks_dir/host-$HOSTNAME \ -c aes-cbc-essiv:sha256 -s 256 || [[ $? == 141 ]] yes "$lukspw" | \ cryptsetup luksAddKey --key-file $luks_dir/host-$HOSTNAME \ `rootdev` || [[ $? == 141 ]] # background: Keyfile and password are treated just # like 2 ways to input a passphrase, so we don't actually need to have # different contents of keyfile and passphrase, but it makes some # security sense to a really big randomly generated passphrase # as much as possible, so we have both. # # This would remove the keyfile. # yes 'test' | cryptsetup luksRemoveKey /dev/... \ # /key/file || [[ $? == 141 ]] cryptsetup luksOpen `rootdev` `root-cryptname` \ --key-file $luks_dir/host-$HOSTNAME done ls -la /dev/btrfs-control sleep 1 bpart $(for dev in ${devs[@]}; do root-cryptdev; done) bpart ${boot_devs[@]} else for dev in ${devs[@]}; do 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 for x in q home_$DISTRO root_$DISTRO; do btrfs subvolume list . | grep "$x$" >/dev/null || btrfs subvolume create $x done chown root:1000 q mkdir -p /mnt/root_$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 cd / umount /mnt ## end create subvols ## cat > /tmp/fai/fstab <> /tmp/fai/fstab <<'EOF' UUID=3f7b31cd-f299-40b4-a86b-7604282e2715 /i btrfs noatime 0 2 EOF fi swaps=() for dev in ${devs[@]}; do swaps+=(`swap-cryptname`) cat >>/tmp/fai/crypttab <> /tmp/fai/fstab </tmp/fai/disk_var.sh <