# # fai's setup-storage won't do btrfs on luks,
# # so we do it ourself :)
+skiptask partition ||: # for running out of fai
#### begin configuration
-if ifclass TWO_DISK || ifclass demohost; then
+bootn=3
+rootn=1
+swapn=2
+bios_grubn=4
+boot_mib=750
+lastn=$bios_grubn
+
+if ifclass VM; then
+ d=vd
+else
+ d=sd
+fi
+
+letters=()
+if ifclass TWO_DISK; then
letters=(a b)
elif ifclass ONE_DISK; then
letters=(a)
+elif ifclass MANY_DISK; then
+ for dev in /dev/${d}?; do letters+=(${dev#/dev/${d}}); done
else
exit 1
fi
##### end configuration
-if ifclass VM; then
- d=vd
-else
- d=sd
-fi
-
+bpart() {
+ dev_n=$1
+ case ${#@} in
+ [1-3]) mkfs.btrfs -f $@ ;;
+ [4-9]*|[1-3]?*) mkfs.btrfs -f -m raid10 -d raid10 $@ ;;
+ esac
+}
-skiptask partition ||: # for running out of fai
devs=(${letters[@]/#//dev/${d}})
crypt_devs=(${letters[@]/#//dev/mapper/crypt_dev_${d}})
+first_boot_dev=${devs[0]}$bootn
-# we can set this manually to force partitioning
-#partition=false
+partition=true # hardcoded for now
# somewhat crude detection of whether to partition
for dev in ${devs[@]}; do
x=($dev[0-9])
- [[ ${#x[@]} == 4 ]] || partition=true
- for part in ${dev}{1,2,3,4}; do
- [[ -e $part ]] || partition=true
+ [[ ${#x[@]} == ${lastn} ]] || partition=true
+ for (( i=1; i <= $lastn; i++ )); do
+ [[ -e ${dev}$i ]] || partition=true
done
- # type tells us it's not totally blank
- for part in ${dev}{1,3}; do
- blkid | grep "^$part:.*TYPE=" &>/dev/null || partition=true
+ for part in $dev$rootn $dev$bootn; do
+ # type tells us it's not totally blank
+ blkid | grep "^${part}:.*TYPE=" &>/dev/null || partition=true
done
done
lukspw=x
fi
-boot_end=504
-
-crypt=/dev/mapper/crypt_dev_${d##/dev/}a3
-
+crypt=/dev/mapper/crypt_dev_${d##/dev/}a$rootn
+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_end=$(( $(grep ^MemTotal: /proc/meminfo| awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1000 + boot_end ))
-
-create_subvols() {
- cd /mnt
- for x in q home root; do
- btrfs subvolume list . | grep "$x$" >/dev/null || btrfs subvolume create $x
- done
- 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 $2}') .
- chattr -Rf +C root
- cd /
- umount /mnt
-}
+swap_mib=$(( $(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=$(( disk_mib - swap_mib - boot_mib ))
+swap_end=$(( root_end + swap_mib))
mkdir -p /tmp/fai
shopt -s nullglob
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 set 1 boot on
- 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 4 bios_grub on
+ # 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
- mkfs.btrfs -f ${crypt_devs[@]/%/3}
- parted ${devs[0]} set 1 boot on
+ bpart ${crypt_devs[@]/%/$rootn}
mount $crypt /mnt
- create_subvols
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
for subvol in ${s[@]}; do btrfs subvolume delete /mnt/$subvol; done
btrfs subvolume set-default 0 /mnt
btrfs subvolume delete /mnt/root
- create_subvols
fi
+bpart ${devs[@]/%/$bootn}
+
+
+## create subvols ##
+cd /mnt
+for x in q home root; do
+ btrfs subvolume list . | grep "$x$" >/dev/null || btrfs subvolume create $x
+done
+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
+cd /
+umount /mnt
+mount $first_boot_dev /mnt
+cd /mnt
+btrfs subvolume create boot
+btrfs subvolume set-default \
+ $(btrfs subvolume list . | grep 'boot$' | awk '{print $2}') .
+cd /
+umount /mnt
+## end create subvols ##
$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
+$first_boot_dev /boot btrfs noatime,subvol=/boot 0 0
EOF
-
swaps=()
for dev in ${devs[@]}; do
- s=crypt_swap_${dev##/dev/}2
+ s=crypt_swap_${dev##/dev/}$swapn
swaps+=(/dev/mapper/$s)
cat >>/tmp/fai/crypttab <<EOF
-crypt_dev_${dev##/dev/}3 ${dev}3 none keyscript=/root/keyscript,discard,luks
-$s ${dev}2 /dev/urandom swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
+crypt_dev_${dev##/dev/}$rootn $dev$rootn none keyscript=/root/keyscript,discard,luks
+$s $dev$swapn /dev/urandom swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
EOF
cat >> /tmp/fai/fstab <<EOF
/dev/mapper/$s none swap sw 0 0
# swaplist seems to do nothing.
cat >/tmp/fai/disk_var.sh <<EOF
ROOT_PARTITION=\${ROOT_PARTITION:-$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