4 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR
6 # # fai's setup-storage won't do btrfs on luks,
7 # # so we do it ourself :)
9 skiptask partition ||
: # for running out of fai
11 #### begin configuration
27 if ifclass TWO_DISK
; then
29 elif ifclass ONE_DISK
; then
31 elif ifclass MANY_DISK
; then
32 for dev
in /dev
/${d}?
; do letters
+=(${dev#/dev/${d}}); done
36 ##### end configuration
42 [1-3]) mkfs.btrfs
-f $@
;;
43 [4-9]*|
[1-3]?
*) mkfs.btrfs
-f -m raid10
-d raid10 $@
;;
47 devs
=(${letters[@]/#//dev/${d}})
48 crypt_devs
=(${letters[@]/#//dev/mapper/crypt_dev_${d}})
52 # somewhat crude detection of whether to partition
53 for dev
in ${devs[@]}; do
55 [[ ${#x[@]} == ${lastn} ]] || partition
=true
56 for (( i
=1; i
<= $lastn; i
++ )); do
57 [[ -e ${dev}$i ]] || partition
=true
59 for part
in $dev$rootn $dev$bootn; do
60 # type tells us it's not totally blank
61 blkid |
grep "^${part}:.*TYPE=" &>/dev
/null || partition
=true
65 #partition=true # for temporarily override
67 # keyfiles generated like:
68 # head -c 2048 /dev/urandom | od | s dd of=/q/root/luks/host-demohost
69 luks_dir
=${LUKS_DIR:-/var/lib/fai/config/distro-install-common/luks}
71 lukspw
=$
(cat $luks_dir/traci
)
73 lukspw
=$
(cat $luks_dir/ian
)
75 if ifclass demohost
; then
80 crypt=/dev
/mapper
/crypt_dev_
${d##/dev/}a
$rootn
83 if ifclass frodo
; then
84 # next upgrade is prolly 16 gigs of memory, across ~8 devices
85 swap_end
=$
((3500 + boot_end
))
87 # 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
88 swap_end
=$
(( $
(grep ^MemTotal
: /proc
/meminfo|
awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1000 + boot_end
))
94 for dev
in ${devs[@]}; do
95 for x
in $dev[0-9]; do wipefs
-a $x; done
97 for dev
in ${devs[@]}; do
98 parted
-s $dev mklabel gpt
99 # gpt ubuntu cloud image uses ~4. fai uses 1 MiB. ehh, i'll do 4.
100 # also, using MB instead of MiB causes complains about alignment.
101 parted
-s $dev mkpart primary
"ext3" 4MB
${boot_end}MiB
102 parted
-s $dev mkpart primary
"linux-swap" ${boot_end}MiB
${swap_end}MiB
103 parted
-s -- $dev mkpart primary
"" ${swap_end}MiB
-0
104 parted
-s $dev mkpart primary
"" 1MiB
4MiB
105 parted
-s $dev set $bios_grubn bios_grub on
106 parted
-s $dev set $bootn boot on
# generally not needed on modern systems
107 # the mkfs failed randomly on a vm, so I threw a sleep in here.
110 # 3 is device which simply holds a key for the 4's,
111 # so we can unlock multi-device btrfs fs with 1 manually entered passphrase.
113 # Background: It's of course possible modify the initramfs to
114 # put the input from a passphrase prompt into a variable and use
115 # it to unlock multiple devices, but that would require figuring
118 for luks_dev
in ${dev}3; do
119 yes YES | cryptsetup luksFormat
$luks_dev $luks_dir/host-
$HOSTNAME \
120 -c aes-cbc-essiv
:sha256
-s 256 ||
[[ $?
== 141 ]]
122 cryptsetup luksAddKey
--key-file $luks_dir/host-
$HOSTNAME \
123 $luks_dev ||
[[ $?
== 141 ]]
124 # background: Keyfile and password are treated just
125 # like 2 ways to input a passphrase, so we don't actually need to have
126 # different contents of keyfile and passphrase, but it makes some
127 # security sense to a really big randomly generated passphrase
128 # as much as possible, so we have both.
130 # This would remove the keyfile.
131 # yes 'test' | cryptsetup luksRemoveKey /dev/... \
132 # /key/file || [[ $? == 141 ]]
134 cryptsetup luksOpen
$luks_dev crypt_dev_
${luks_dev##/dev/} \
135 --key-file $luks_dir/host-
$HOSTNAME
138 #bpart ${devs[@]/%/$rootn}
139 bpart
${crypt_devs[@]/%/3}
140 parted
${devs[0]} set 1 boot on
143 for dev
in ${devs[@]}; do
145 cryptsetup luksOpen
${dev}3 crypt_dev_
${dev##/dev/}3 \
146 --key-file $luks_dir/host-
$HOSTNAME ||
[[ $?
== 141 ]]
149 mount
-o subvolid
=0 $crypt /mnt
150 # systemd creates subvolumes we want to delete.
151 s
=($
(btrfs subvolume list
--sort=-path /mnt |
152 sed -rn 's#^.*path\s*(root/\S+)\s*$#\1#p'))
153 for subvol
in ${s[@]}; do btrfs subvolume delete
/mnt
/$subvol; done
154 btrfs subvolume set-default
0 /mnt
155 btrfs subvolume delete
/mnt
/root
160 for x
in q home root
; do
161 btrfs subvolume list . |
grep "$x$" >/dev
/null || btrfs subvolume create
$x
163 for x
in root
/a q
/a
; do
168 btrfs subvolume set-default \
169 $
(btrfs subvolume list . |
grep 'root$' |
awk '{print $2}') .
173 ## end create subvols ##
177 cat > /tmp
/fai
/fstab
<<EOF
178 $crypt / btrfs noatime,subvol=/root 0 0
179 $crypt /q btrfs noatime,subvol=/q 0 0
180 /q/a /a none bind 0 0
181 $crypt /home btrfs noatime,subvol=/home 0 0
182 ${devs[0]}1 /boot ext4 noatime 0 2
187 for dev
in ${devs[@]}; do
188 s
=crypt_swap_
${dev##/dev/}$swapn
189 swaps
+=(/dev
/mapper
/$s)
190 cat >>/tmp
/fai
/crypttab
<<EOF
191 crypt_dev_${dev##/dev/}$rootn $dev$rootn none keyscript=/root/keyscript,discard,luks
192 $s $dev$swapn /dev/urandom swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
194 cat >> /tmp
/fai
/fstab
<<EOF
195 /dev/mapper/$s none swap sw 0 0
200 # swaplist seems to do nothing.
201 cat >/tmp
/fai
/disk_var.sh
<<EOF
202 ROOT_PARTITION=\${ROOT_PARTITION:-$crypt}
203 BOOT_PARTITION=\${BOOT_PARTITION:-${devs[0]}1}
204 BOOT_DEVICE=\${BOOT_DEVICE:-"${devs[0]}"}
205 SWAPLIST=\${SWAPLIST:-"${swaps[@]}"}