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improve installation scripting:

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further improve scripting robustness, add fs.disks.devices.partitionDuringInstallation, ad fs.zfs.datasets.*.recursiveProps, add deploy-system-to-hetzner-vps install script
This commit is contained in:
Niklas Gollenstede
2023-05-02 02:13:24 +02:00
parent c001ad7f51
commit dd8fc696f4
20 changed files with 317 additions and 242 deletions
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33
lib/setup-scripts/disk.sh
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@ -6,12 +6,12 @@
## Prepares the disks of the target system for the copying of files.
function do-disk-setup { # 1: diskPaths
ensure-disks "$1" || return
prompt-for-user-passwords || return
populate-keystore || return
mnt=/tmp/nixos-install-@{config.networking.hostName} && mkdir -p "$mnt" && prepend_trap "rmdir $mnt" EXIT || return # »mnt=/run/user/0/...« would be more appropriate, but »nixos-install« does not like the »700« permissions on »/run/user/0«
ensure-disks "$1" || return
partition-disks || return
create-luks-layers && open-luks-layers || return # other block layers would go here too (but figuring out their dependencies would be difficult)
run-hook-script 'Post Partitioning' @{config.wip.fs.disks.postPartitionCommands!writeText.postPartitionCommands} || return
@ -51,6 +51,7 @@ function ensure-disks { # 1: diskPaths, 2?: skipLosetup
fi
local name ; for name in "@{!config.wip.fs.disks.devices[@]}" ; do
if [[ ! @{config.wip.fs.disks.devices!catAttrSets.partitionDuringInstallation[$name]} ]] ; then continue ; fi
if [[ ! ${blockDevs[$name]:-} ]] ; then echo "Path for block device $name not provided" 1>&2 ; \return 1 ; fi
eval 'local -A disk='"@{config.wip.fs.disks.devices[$name]}"
if [[ ${blockDevs[$name]} != /dev/* ]] ; then
@ -58,9 +59,9 @@ function ensure-disks { # 1: diskPaths, 2?: skipLosetup
install -m 640 -T /dev/null "$outFile" && truncate -s "${disk[size]}" "$outFile" || return
if [[ ${args[image-owner]:-} ]] ; then chown "${args[image-owner]}" "$outFile" || return ; fi
if [[ ${2:-} ]] ; then continue ; fi
blockDevs[$name]=$( losetup --show -f "$outFile" ) && prepend_trap "losetup -d '${blockDevs[$name]}'" EXIT || return
blockDevs[$name]=$( @{native.util-linux}/bin/losetup --show -f "$outFile" ) && prepend_trap "@{native.util-linux}/bin/losetup -d '${blockDevs[$name]}'" EXIT || return
else
local size=$( blockdev --getsize64 "${blockDevs[$name]}" || : ) ; local waste=$(( size - ${disk[size]} ))
local size=$( @{native.util-linux}/bin/blockdev --getsize64 "${blockDevs[$name]}" || : ) ; local waste=$(( size - ${disk[size]} ))
if [[ ! $size ]] ; then echo "Block device $name does not exist at ${blockDevs[$name]}" 1>&2 ; \return 1 ; fi
if (( waste < 0 )) ; then echo "Block device ${blockDevs[$name]}'s size $size is smaller than the size ${disk[size]} declared for $name" 1>&2 ; \return 1 ; fi
if (( waste > 0 )) && [[ ! ${disk[allowLarger]:-} ]] ; then echo "Block device ${blockDevs[$name]}'s size $size is bigger than the size ${disk[size]} declared for $name" 1>&2 ; \return 1 ; fi
@ -83,9 +84,10 @@ function partition-disks {
done
for name in "@{!config.wip.fs.disks.devices[@]}" ; do
if [[ ! @{config.wip.fs.disks.devices!catAttrSets.partitionDuringInstallation[$name]} ]] ; then continue ; fi
eval 'local -A disk='"@{config.wip.fs.disks.devices[$name]}"
if [[ ${disk[serial]:-} ]] ; then
actual=$( udevadm info --query=property --name="$blockDev" | grep -oP 'ID_SERIAL_SHORT=\K.*' || echo '<none>' )
actual=$( @{native.systemd}/bin/udevadm info --query=property --name="$blockDev" | grep -oP 'ID_SERIAL_SHORT=\K.*' || echo '<none>' )
if [[ ${disk[serial]} != "$actual" ]] ; then echo "Block device $blockDev's serial ($actual) does not match the serial (${disk[serial]}) declared for ${disk[name]}" 1>&2 ; \return 1 ; fi
fi
# can (and probably should) restore the backup:
@ -96,7 +98,8 @@ function partition-disks {
@{native.systemd}/bin/udevadm settle -t 15 || true # sometimes partitions aren't quite made available yet
# ensure that filesystem creation does not complain about the devices already being occupied by a previous filesystem
wipefs --all "@{config.wip.fs.disks.partitions!attrNames[@]/#/'/dev/disk/by-partlabel/'}" >$beLoud 2>$beSilent || return
local toWipe=( ) ; for part in "@{config.wip.fs.disks.partitions!attrNames[@]/#/'/dev/disk/by-partlabel/'}" ; do [[ ! -e "$part" ]] || toWipe+=( "$part" ) ; done
@{native.util-linux}/bin/wipefs --all "${toWipe[@]}" >$beLoud 2>$beSilent || return
#</dev/zero head -c 4096 | tee "@{config.wip.fs.disks.partitions!attrNames[@]/#/'/dev/disk/by-partlabel/'}" >/dev/null
#for part in "@{config.wip.fs.disks.partitions!attrNames[@]/#/'/dev/disk/by-partlabel/'}" ; do @{native.util-linux}/bin/blkdiscard -f "$part" || return ; done
}
@ -190,7 +193,7 @@ function format-partitions {
elif [[ $swapDev == /dev/mapper/* ]] ; then
if [[ ! @{config.boot.initrd.luks.devices!catAttrSets.device[${swapDev/'/dev/mapper/'/}]:-} ]] ; then echo "LUKS device $swapDev used for SWAP does not point at one of the device mappings @{!config.boot.initrd.luks.devices!catAttrSets.device[@]}" 1>&2 ; \return 1 ; fi
else continue ; fi
( ${_set_x:-:} ; mkswap "$swapDev" >$beLoud 2>$beSilent ) || return
( PATH=@{native.util-linux}/bin ; ${_set_x:-:} ; mkswap "$swapDev" >$beLoud 2>$beSilent ) || return
done
}
@ -204,7 +207,7 @@ function fix-grub-install {
device=$( eval 'declare -A fs='"@{config.fileSystems[$mount]}" ; echo "${fs[device]}" )
label=${device/\/dev\/disk\/by-partlabel\//}
if [[ $label == "$device" || $label == *' '* || ' '@{config.wip.fs.disks.partitions!attrNames[@]}' ' != *' '$label' '* ]] ; then echo "" 1>&2 ; \return 1 ; fi
bootLoop=$( losetup --show -f /dev/disk/by-partlabel/$label ) || return ; prepend_trap "losetup -d $bootLoop" EXIT
bootLoop=$( @{native.util-linux}/bin/losetup --show -f /dev/disk/by-partlabel/$label ) || return ; prepend_trap "@{native.util-linux}/bin/losetup -d $bootLoop" EXIT
ln -sfT ${bootLoop/\/dev/..\/..} /dev/disk/by-partlabel/$label || return
done
#umount $mnt/boot/grub || true ; umount $mnt/boot || true ; mount $mnt/boot || true ; mount $mnt/boot/grub || true
@ -213,7 +216,7 @@ function fix-grub-install {
## Mounts all file systems as it would happen during boot, but at path prefix »$mnt« (instead of »/«).
function mount-system {( set -eu # 1: mnt, 2?: fstabPath, 3?: allowFail
function mount-system {( # 1: mnt, 2?: fstabPath, 3?: allowFail
# While not generally required for fstab, nixos uses the dependency-sorted »config.system.build.fileSystems« list (instead of plain »builtins.attrValues config.fileSystems«) to generate »/etc/fstab« (provided »config.fileSystems.*.depends« is set correctly, e.g. for overlay mounts).
# This function depends on the file at »fstabPath« to be sorted like that.
@ -225,7 +228,7 @@ function mount-system {( set -eu # 1: mnt, 2?: fstabPath, 3?: allowFail
if [[ ! $target || $target == none ]] ; then continue ; fi
options=,$options, ; options=${options//,ro,/,}
if ! mountpoint -q "$mnt"/"$target" ; then (
if ! @{native.util-linux}/bin/mountpoint -q "$mnt"/"$target" ; then (
mkdir -p "$mnt"/"$target" || exit
[[ $type == tmpfs || $type == auto || $type == */* ]] || @{native.kmod}/bin/modprobe --quiet $type || true # (this does help sometimes)
@ -241,19 +244,19 @@ function mount-system {( set -eu # 1: mnt, 2?: fstabPath, 3?: allowFail
source=$mnt/$source ; if [[ ! -e $source ]] ; then mkdir -p "$source" || exit ; fi
fi
mount -t $type -o "${options:1:(-1)}" "$source" "$mnt"/"$target" || exit
@{native.util-linux}/bin/mount -t $type -o "${options:1:(-1)}" "$source" "$mnt"/"$target" || exit
) || [[ $options == *,nofail,* || $allowFail ]] || exit ; fi # (actually, nofail already makes mount fail silently)
done 3< <( <$fstabPath grep -v '^#' )
)}
## Unmounts all file systems (that would be mounted during boot / by »mount-system«).
function unmount-system {( set -eu # 1: mnt, 2?: fstabPath
mnt=$1 ; fstabPath=${2:-"@{config.system.build.toplevel}/etc/fstab"}
function unmount-system { # 1: mnt, 2?: fstabPath
local mnt=$1 ; local fstabPath=${2:-"@{config.system.build.toplevel}/etc/fstab"}
while read -u3 source target rest ; do
if [[ ! $target || $target == none ]] ; then continue ; fi
if mountpoint -q "$mnt"/"$target" ; then
umount "$mnt"/"$target"
if @{native.util-linux}/bin/mountpoint -q "$mnt"/"$target" ; then
@{native.util-linux}/bin/umount "$mnt"/"$target" || return
fi
done 3< <( { <$fstabPath grep -v '^#' ; echo ; } | tac )
)}
}