30 lines
1.2 KiB
Nix
30 lines
1.2 KiB
Nix
{ config, pkgs, ... }:
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{
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# adapted from:
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# https://github.com/NixOS/nixpkgs/blob/3428bdf3c93a7608615dddd44dec50c3df89b4be/nixos/modules/system/boot/kexec.nix
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# https://github.com/NixOS/nixpkgs/blob/3428bdf3c93a7608615dddd44dec50c3df89b4be/nixos/modules/tasks/auto-upgrade.nix
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systemd.services.reboot-after-update = {
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restartIfChanged = false;
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unitConfig.X-StopOnRemoval = false;
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serviceConfig.Type = "oneshot";
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path = [
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config.systemd.package
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pkgs.coreutils
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pkgs.kexec-tools
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];
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script = ''
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booted="$(readlink /run/booted-system/{initrd,kernel,kernel-modules} && cat /run/booted-system/kernel-params)"
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p="$(readlink -f /nix/var/nix/profiles/system)"
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built="$(readlink $p/{initrd,kernel,kernel-modules} && cat $p/kernel-params)"
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if [ "''${booted}" != "''${built}" ]; then
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# don't use kexec if system is virtualized
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systemd-detect-virt -q || kexec --load $p/kernel --initrd=$p/initrd --append="$(cat $p/kernel-params) init=$p/init"
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systemctl reboot
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fi
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'';
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startAt = "hourly";
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};
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systemd.timers.reboot-after-update = {
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timerConfig.RandomizedDelaySec = "2h";
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};
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}
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