# # fai's setup-storage won't do btrfs on luks,
# # so we do it ourself :)
-skiptask partition ||: # for running out of fai
+skiptask partition || ! type skiptask # for running not in fai
#### begin configuration
-bootn=1
+partition=true # change to true to force a full wipe
+bootn=3
+rootn=1
swapn=2
-rootn=3
bios_grubn=4
-boot_end=804
+boot_mib=1500
+
+
+##### end configuration
+
lastn=$bios_grubn
-if ifclass VM; then
- d=vd
+
+hds=()
+ssds=()
+cd /sys/block
+for disk in [sv]d[a-z]; do
+ case $(cat $disk/queue/rotational) in
+ 0) ssds+=(/dev/$disk) ;;
+ 1) hds+=(/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
+ devs=( ${ssds[@]} )
else
- d=sd
+ devs=( ${hds[@]} )
fi
-letters=()
-if ifclass TWO_DISK; then
- letters=(a b)
-elif ifclass ONE_DISK; then
- letters=(a)
-elif ifclass MANY_DISK; then
- for dev in /dev/${d}?; do letters+=(${dev#/dev/${d}}); done
-else
- exit 1
+
+if [[ ! $DISTRO ]]; then
+ if ifclass STABLE; then
+ DISTRO=debianjessie
+ else
+ DISTRO=debiantesting
+ fi
fi
-##### end configuration
-bpart() {
+
+bpart() { # btrfs a partition
dev_n=$1
case ${#@} in
[1-3]) mkfs.btrfs -f $@ ;;
esac
}
-devs=(${letters[@]/#//dev/${d}})
-crypt_devs=(${letters[@]/#//dev/mapper/crypt_dev_${d}})
-
-partition=true
+first_boot_dev=${devs[0]}$bootn
+crypt_devs=()
# somewhat crude detection of whether to partition
for dev in ${devs[@]}; do
+ crypt_devs+=( /dev/mapper/crypt_dev_${dev#/dev/} )
x=($dev[0-9])
[[ ${#x[@]} == ${lastn} ]] || partition=true
for (( i=1; i <= $lastn; i++ )); do
done
done
-#partition=true # for temporarily override
-
# keyfiles generated like:
# head -c 2048 /dev/urandom | od | s dd of=/q/root/luks/host-demohost
luks_dir=${LUKS_DIR:-/var/lib/fai/config/distro-install-common/luks}
fi
-crypt=/dev/mapper/crypt_dev_${d##/dev/}a$rootn
+crypt=${crypt_devs[0]}$rootn
-
-if ifclass frodo; then
- # next upgrade is prolly 16 gigs of memory, across ~8 devices
- swap_end=$((3500 + boot_end))
-else
- # 1.5 x based on https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-partitioning-setup-x86.html#sect-custom-partitioning-x86
- swap_end=$(( $(grep ^MemTotal: /proc/meminfo| awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1000 + boot_end ))
-fi
+bios_grub_end=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 ))
+# 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.
+disk_mib=$(( $(parted -m ${devs[0]} unit MiB print | \
+ sed -nr "s#^${devs[0]}:([0-9]+).*#\1#p") - 1))
+root_end=$(( disk_mib - swap_mib - boot_mib / ${#devs[@]} ))
+swap_end=$(( root_end + swap_mib))
mkdir -p /tmp/fai
shopt -s nullglob
if $partition; then
for dev in ${devs[@]}; do
- for x in $dev[0-9]; do wipefs -a $x; done
+ 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 -s $dev mklabel gpt
- # gpt ubuntu cloud image uses ~4. fai uses 1 MiB. ehh, i'll do 4.
- # also, using MB instead of MiB causes complains about alignment.
- parted -s $dev mkpart primary "ext3" 4MB ${boot_end}MiB
- parted -s $dev mkpart primary "linux-swap" ${boot_end}MiB ${swap_end}MiB
- parted -s -- $dev mkpart primary "" ${swap_end}MiB -0
- parted -s $dev mkpart primary "" 1MiB 4MiB
- parted -s $dev set $bios_grubn bios_grub on
- parted -s $dev set $bootn boot on # generally not needed on modern systems
+ # 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 randomly on a vm, so I threw a sleep in here.
sleep .1
- mkfs.ext4 -F ${dev}1
- # 3 is device which simply holds a key for the 4's,
- # so we can unlock multi-device btrfs fs with 1 manually entered passphrase.
- #
- # Background: It's of course possible modify the initramfs to
- # put the input from a passphrase prompt into a variable and use
- # it to unlock multiple devices, but that would require figuring
- # more things out.
+
+ luks_dev=$dev$rootn
+ yes YES | cryptsetup luksFormat $luks_dev $luks_dir/host-$HOSTNAME \
+ -c aes-cbc-essiv:sha256 -s 256 || [[ $? == 141 ]]
+ yes "$lukspw" | \
+ cryptsetup luksAddKey --key-file $luks_dir/host-$HOSTNAME \
+ $luks_dev || [[ $? == 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.
#
- for luks_dev in ${dev}3; do
- yes YES | cryptsetup luksFormat $luks_dev $luks_dir/host-$HOSTNAME \
- -c aes-cbc-essiv:sha256 -s 256 || [[ $? == 141 ]]
- yes "$lukspw" | \
- cryptsetup luksAddKey --key-file $luks_dir/host-$HOSTNAME \
- $luks_dev || [[ $? == 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 $luks_dev crypt_dev_${luks_dev##/dev/} \
- --key-file $luks_dir/host-$HOSTNAME
- done
+ # This would remove the keyfile.
+ # yes 'test' | cryptsetup luksRemoveKey /dev/... \
+ # /key/file || [[ $? == 141 ]]
+
+ cryptsetup luksOpen $luks_dev crypt_dev_${luks_dev##/dev/} \
+ --key-file $luks_dir/host-$HOSTNAME
done
- #bpart ${devs[@]/%/$rootn}
- bpart ${crypt_devs[@]/%/3}
- parted ${devs[0]} set 1 boot on
- mount $crypt /mnt
+ bpart ${crypt_devs[@]/%/$rootn}
+ bpart ${devs[@]/%/$bootn}
else
for dev in ${devs[@]}; do
- mkfs.ext4 -F ${dev}1
- cryptsetup luksOpen ${dev}3 crypt_dev_${dev##/dev/}3 \
+ cryptsetup luksOpen $dev$rootn crypt_dev_${dev##/dev/}$rootn \
--key-file $luks_dir/host-$HOSTNAME || [[ $? == 141 ]]
done
sleep 1
- mount -o subvolid=0 $crypt /mnt
- # systemd creates subvolumes we want to delete.
- s=($(btrfs subvolume list --sort=-path /mnt |
- sed -rn 's#^.*path\s*(root/\S+)\s*$#\1#p'))
- for subvol in ${s[@]}; do btrfs subvolume delete /mnt/$subvol; done
- btrfs subvolume set-default 0 /mnt
- btrfs subvolume delete /mnt/root
fi
+mount -o subvolid=0 $crypt /mnt
+# systemd creates subvolumes we want to delete.
+s=($(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 root; do
+for x in q home_$DISTRO root_$DISTRO; do
btrfs subvolume list . | grep "$x$" >/dev/null || btrfs subvolume create $x
done
+mkdir -p /mnt/root_$DISTRO/boot
for x in root/a q/a; do
mkdir -p $x
chown 1000:1000 $x
chmod 755 $x
done
-btrfs subvolume set-default \
- $(btrfs subvolume list . | grep 'root$' | awk '{print $2}') .
-chattr -Rf +C root
+# 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 <<EOF
-$crypt / btrfs noatime,subvol=/root 0 0
-$crypt /q btrfs noatime,subvol=/q 0 0
+$crypt / btrfs noatime,subvol=root_$DISTRO 0 0
+$crypt /q btrfs noatime,subvol=q 0 0
/q/a /a none bind 0 0
-$crypt /home btrfs noatime,subvol=/home 0 0
-${devs[0]}1 /boot ext4 noatime 0 2
+$crypt /home btrfs noatime,subvol=home_$DISTRO 0 0
+$first_boot_dev /boot btrfs noatime,subvol=boot_$DISTRO 0 0
EOF
-
swaps=()
for dev in ${devs[@]}; do
s=crypt_swap_${dev##/dev/}$swapn
# swaplist seems to do nothing.
cat >/tmp/fai/disk_var.sh <<EOF
ROOT_PARTITION=\${ROOT_PARTITION:-$crypt}
-BOOT_PARTITION=\${BOOT_PARTITION:-${devs[0]}1}
+BOOT_PARTITION=\${BOOT_PARTITION:-$first_boot_dev}
BOOT_DEVICE=\${BOOT_DEVICE:-"${devs[0]}"}
SWAPLIST=\${SWAPLIST:-"${swaps[@]}"}
EOF
iankelling.org / git / automated-distro-installer / blobdiff