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nixos: kexec: Disable on non-keexecable systems.

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This commit is contained in:
Shea Levy 2018-02-27 20:34:13 -05:00
parent d61a22fb0e
commit a929301281
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1 changed files with 19 additions and 18 deletions
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37
nixos/modules/system/boot/kexec.nix
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@ -1,21 +1,22 @@
{ config, pkgs, ... }: { config, pkgs, lib, ... }:
{ {
environment.systemPackages = [ pkgs.kexectools ]; config = lib.mkIf (pkgs.kexectools != null) {
environment.systemPackages = [ pkgs.kexectools ];
systemd.services."prepare-kexec" = systemd.services."prepare-kexec" =
{ description = "Preparation for kexec"; { description = "Preparation for kexec";
wantedBy = [ "kexec.target" ]; wantedBy = [ "kexec.target" ];
before = [ "systemd-kexec.service" ]; before = [ "systemd-kexec.service" ];
unitConfig.DefaultDependencies = false; unitConfig.DefaultDependencies = false;
serviceConfig.Type = "oneshot"; serviceConfig.Type = "oneshot";
path = [ pkgs.kexectools ]; path = [ pkgs.kexectools ];
script = script =
'' ''
p=$(readlink -f /nix/var/nix/profiles/system) p=$(readlink -f /nix/var/nix/profiles/system)
if ! [ -d $p ]; then exit 1; fi if ! [ -d $p ]; then exit 1; fi
exec kexec --load $p/kernel --initrd=$p/initrd --append="$(cat $p/kernel-params) init=$p/init" exec kexec --load $p/kernel --initrd=$p/initrd --append="$(cat $p/kernel-params) init=$p/init"
''; '';
}; };
};
} }