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[WIP]: initrd: Use systemd #120015

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[WIP]: initrd: Use systemd #120015

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6987073
Add vmConfig to nixos/default.nix
ElvishJerricco Apr 18, 2021
d3e6e2a
initrd: Rewrite to use systemd
ElvishJerricco Apr 18, 2021
5c50976
systemd: Use systemd-makefs and growfs
ElvishJerricco Apr 18, 2021
dc756fe
qemu-vm: Support systemd initrd
ElvishJerricco Apr 18, 2021
cad9847
initrd: Support luks with systemd and /etc/crypttab
ElvishJerricco Apr 18, 2021
1404a51
initrd: Only load the minimum in modules-load.d
ElvishJerricco Apr 22, 2021
7fd29f6
systemd-initrd: Use a Rust script for dependency solving
ElvishJerricco Jul 9, 2021
c604154
systemd-initrd: Cleanup some systemd units
ElvishJerricco Jul 9, 2021
78d09d5
systemd-initrd: Remove defunct make-initrd.nix and find-libs.nix
ElvishJerricco Jul 9, 2021
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25 changes: 12 additions & 13 deletions nixos/modules/system/boot/systemd-units.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -3,29 +3,28 @@
runCommand "systemd-units" { } ''
set -euo pipefail
mkdir $out
(cd ${systemd}/example/systemd; find . -type f) | while read -r f; do
(cd ${systemd}/example/systemd; find . -type f -o -type l) | while read -r f; do
mkdir -p $out/$(dirname "$f")
cp "${systemd}/example/systemd/$f" "$out/$f"
cp -d "${systemd}/example/systemd/$f" "$out/$f"
done

# TODO: I believe much of this can be fixed by using -type l and cp -d above,
# but that brings a lot more units with a lot more problems.
mkdir $out/system/initrd.target.wants
ln -s ../systemd-udevd.service $out/system/initrd.target.wants/systemd-udevd.service
ln -s ../systemd-modules-load.service $out/system/initrd.target.wants/systemd-modules-load.service
ln -s ../systemd-journald.service $out/system/initrd.target.wants/systemd-journald.service
ln -s ../systemd-ask-password-console.service $out/system/initrd.target.wants/systemd-ask-password-console.service
ln -s ../systemd-vconsole-setup.service $out/system/initrd.target.wants/systemd-vconsole-setup.service
ln -s ../systemd-udev-settle.service $out/system/initrd.target.wants/systemd-udev-settle.service
ln -s ../systemd-udev-trigger.service $out/system/initrd.target.wants/systemd-udev-trigger.service
mkdir $out/system/sysinit.target.wants
ln -s ../cryptsetup.target $out/system/sysinit.target.wants

# For some reason, running 'udevadm info --cleanup-db' in initrd causes
# LUKS devices to get SYSTEMD_READY=0 in stage 2 (but not other devices)
# which prevents LUKS encrypted file systems from being mounted in stage 2.
rm $out/system/initrd-udevadm-cleanup-db.service

ln -s ../plymouth-start.service $out/system/initrd.target.wants/plymouth-start.service

rm $out/system/proc-sys-fs-binfmt_misc.automount
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Do we have a good advice of developers when to add a line here? Previously units were opt-in and now we have some list of units that we don't want anymore.

For example I could see why we want the random seed in the initrd when unlocking the system using some network interaction that requires cryptography.

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These services were simply the ones that created errors during boot. I didn't spend much time trying to figure out why they caused errors.

rm $out/system/systemd-random-seed.service
rm $out/system/systemd-update-utmp.service
rm $out/system/systemd-update-done.service
rm $out/system/systemd-sysctl.service
rm $out/system/systemd-hwdb-update.service

rm $out/system/default.target
ln -s initrd.target $out/system/default.target

${lib.concatStringsSep "\n" (lib.mapAttrsToList (n: u: ''
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