f358f7326b
This should barely increase the size of the initrd, because these are all symlinks. With this, systems with dm-cache/lvmcache can also be booted, although the kernel modules for the relevant dm targets still need to be added to the initrd with boot.initrd.kernelModules.
84 lines
2.8 KiB
Nix
84 lines
2.8 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.lvm;
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in {
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options.services.lvm = {
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package = mkOption {
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type = types.package;
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default = if cfg.dmeventd.enable then pkgs.lvm2_dmeventd else pkgs.lvm2;
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internal = true;
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defaultText = "pkgs.lvm2";
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description = ''
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This option allows you to override the LVM package that's used on the system
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(udev rules, tmpfiles, systemd services).
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Defaults to pkgs.lvm2, or pkgs.lvm2_dmeventd if dmeventd is enabled.
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'';
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};
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dmeventd.enable = mkEnableOption "the LVM dmevent daemon";
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boot.thin.enable = mkEnableOption "support for booting from ThinLVs";
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};
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config = mkMerge [
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({
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# minimal configuration file to make lvmconfig/lvm2-activation-generator happy
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environment.etc."lvm/lvm.conf".text = "config {}";
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})
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(mkIf (!config.boot.isContainer) {
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systemd.tmpfiles.packages = [ cfg.package.out ];
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environment.systemPackages = [ cfg.package ];
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systemd.packages = [ cfg.package ];
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# TODO: update once https://github.com/NixOS/nixpkgs/pull/93006 was merged
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services.udev.packages = [ cfg.package.out ];
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})
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(mkIf cfg.dmeventd.enable {
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systemd.sockets."dm-event".wantedBy = [ "sockets.target" ];
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systemd.services."lvm2-monitor".wantedBy = [ "sysinit.target" ];
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environment.etc."lvm/lvm.conf".text = ''
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dmeventd/executable = "${cfg.package}/bin/dmeventd"
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'';
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})
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(mkIf cfg.boot.thin.enable {
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boot.initrd = {
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kernelModules = [ "dm-snapshot" "dm-thin-pool" ];
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extraUtilsCommands = ''
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for BIN in ${pkgs.thin-provisioning-tools}/bin/*; do
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copy_bin_and_libs $BIN
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done
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'';
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extraUtilsCommandsTest = ''
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ls ${pkgs.thin-provisioning-tools}/bin/ | grep -v pdata_tools | while read BIN; do
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$out/bin/$(basename $BIN) --help > /dev/null
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done
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'';
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};
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environment.etc."lvm/lvm.conf".text = concatMapStringsSep "\n"
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(bin: "global/${bin}_executable = ${pkgs.thin-provisioning-tools}/bin/${bin}")
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[ "thin_check" "thin_dump" "thin_repair" "cache_check" "cache_dump" "cache_repair" ];
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})
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(mkIf (cfg.dmeventd.enable || cfg.boot.thin.enable) {
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boot.initrd.preLVMCommands = ''
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mkdir -p /etc/lvm
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cat << EOF >> /etc/lvm/lvm.conf
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${optionalString cfg.boot.thin.enable (
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concatMapStringsSep "\n"
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(bin: "global/${bin}_executable = $(command -v ${bin})")
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[ "thin_check" "thin_dump" "thin_repair" "cache_check" "cache_dump" "cache_repair" ]
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)
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}
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${optionalString cfg.dmeventd.enable ''
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dmeventd/executable = "$(command -v false)"
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activation/monitoring = 0
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''}
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EOF
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'';
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})
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];
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}
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