diff options
Diffstat (limited to 'nixos/modules/tasks/lvm.nix')
-rw-r--r-- | nixos/modules/tasks/lvm.nix | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/nixos/modules/tasks/lvm.nix b/nixos/modules/tasks/lvm.nix new file mode 100644 index 00000000000..35316603c38 --- /dev/null +++ b/nixos/modules/tasks/lvm.nix @@ -0,0 +1,84 @@ +{ config, lib, pkgs, ... }: + +with lib; +let + cfg = config.services.lvm; +in { + options.services.lvm = { + package = mkOption { + type = types.package; + default = if cfg.dmeventd.enable then pkgs.lvm2_dmeventd else pkgs.lvm2; + internal = true; + defaultText = literalExpression "pkgs.lvm2"; + description = '' + This option allows you to override the LVM package that's used on the system + (udev rules, tmpfiles, systemd services). + Defaults to pkgs.lvm2, or pkgs.lvm2_dmeventd if dmeventd is enabled. + ''; + }; + dmeventd.enable = mkEnableOption "the LVM dmevent daemon"; + boot.thin.enable = mkEnableOption "support for booting from ThinLVs"; + }; + + config = mkMerge [ + ({ + # minimal configuration file to make lvmconfig/lvm2-activation-generator happy + environment.etc."lvm/lvm.conf".text = "config {}"; + }) + (mkIf (!config.boot.isContainer) { + systemd.tmpfiles.packages = [ cfg.package.out ]; + environment.systemPackages = [ cfg.package ]; + systemd.packages = [ cfg.package ]; + + # TODO: update once https://github.com/NixOS/nixpkgs/pull/93006 was merged + services.udev.packages = [ cfg.package.out ]; + }) + (mkIf cfg.dmeventd.enable { + systemd.sockets."dm-event".wantedBy = [ "sockets.target" ]; + systemd.services."lvm2-monitor".wantedBy = [ "sysinit.target" ]; + + environment.etc."lvm/lvm.conf".text = '' + dmeventd/executable = "${cfg.package}/bin/dmeventd" + ''; + }) + (mkIf cfg.boot.thin.enable { + boot.initrd = { + kernelModules = [ "dm-snapshot" "dm-thin-pool" ]; + + extraUtilsCommands = '' + for BIN in ${pkgs.thin-provisioning-tools}/bin/*; do + copy_bin_and_libs $BIN + done + ''; + + extraUtilsCommandsTest = '' + ls ${pkgs.thin-provisioning-tools}/bin/ | grep -v pdata_tools | while read BIN; do + $out/bin/$(basename $BIN) --help > /dev/null + done + ''; + }; + + environment.etc."lvm/lvm.conf".text = concatMapStringsSep "\n" + (bin: "global/${bin}_executable = ${pkgs.thin-provisioning-tools}/bin/${bin}") + [ "thin_check" "thin_dump" "thin_repair" "cache_check" "cache_dump" "cache_repair" ]; + }) + (mkIf (cfg.dmeventd.enable || cfg.boot.thin.enable) { + boot.initrd.preLVMCommands = '' + mkdir -p /etc/lvm + cat << EOF >> /etc/lvm/lvm.conf + ${optionalString cfg.boot.thin.enable ( + concatMapStringsSep "\n" + (bin: "global/${bin}_executable = $(command -v ${bin})") + [ "thin_check" "thin_dump" "thin_repair" "cache_check" "cache_dump" "cache_repair" ] + ) + } + ${optionalString cfg.dmeventd.enable '' + dmeventd/executable = "$(command -v false)" + activation/monitoring = 0 + ''} + EOF + ''; + }) + ]; + +} |