nixpkgs/nixos/modules/system/boot/kexec.nix

23 lines
698 B
Nix

{ config, pkgs, lib, ... }:
{
config = lib.mkIf (pkgs.kexectools != null) {
environment.systemPackages = [ pkgs.kexectools ];
systemd.services."prepare-kexec" =
{ description = "Preparation for kexec";
wantedBy = [ "kexec.target" ];
before = [ "systemd-kexec.service" ];
unitConfig.DefaultDependencies = false;
serviceConfig.Type = "oneshot";
path = [ pkgs.kexectools ];
script =
''
p=$(readlink -f /nix/var/nix/profiles/system)
if ! [ -d $p ]; then exit 1; fi
exec kexec --load $p/kernel --initrd=$p/initrd --append="$(cat $p/kernel-params) init=$p/init"
'';
};
};
}