32 lines
1.1 KiB
Nix
32 lines
1.1 KiB
Nix
{ pkgs, lib, ... }:
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{
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config = lib.mkIf (lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.kexec-tools) {
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environment.systemPackages = [ pkgs.kexec-tools ];
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systemd.services.prepare-kexec =
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{ description = "Preparation for kexec";
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wantedBy = [ "kexec.target" ];
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before = [ "systemd-kexec.service" ];
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unitConfig.DefaultDependencies = false;
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serviceConfig.Type = "oneshot";
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path = [ pkgs.kexec-tools ];
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script =
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''
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# Don't load the current system profile if we already have a kernel loaded
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if [[ 1 = "$(</sys/kernel/kexec_loaded)" ]] ; then
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echo "kexec kernel has already been loaded, prepare-kexec skipped"
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exit 0
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fi
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p=$(readlink -f /nix/var/nix/profiles/system)
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if ! [[ -d $p ]]; then
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echo "Could not find system profile for prepare-kexec"
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exit 1
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fi
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echo "Loading NixOS system via kexec."
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exec kexec --load "$p/kernel" --initrd="$p/initrd" --append="$(cat "$p/kernel-params") init=$p/init"
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'';
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};
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};
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}
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