70 lines
2.1 KiB
Nix
70 lines
2.1 KiB
Nix
{ lib, config, ... }:
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let
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cfg = config.aux.system.raid;
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in
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{
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options = {
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aux.system.raid = {
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enable = lib.mkEnableOption "Enables RAID support.";
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storage = {
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enable = lib.mkEnableOption "Enables support for the storage array.";
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mailAddr = lib.mkOption {
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default = "";
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type = lib.types.str;
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description = "Address to email in case of issues.";
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example = "admin@example.com";
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};
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keyFile = lib.mkOption {
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default = "";
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type = lib.types.path;
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description = "Path to the key file to use to auto-unlock the array.";
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example = /home/user/storage.key;
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};
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};
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};
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};
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config = lib.mkMerge [
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(lib.mkIf cfg.enable { boot.swraid.enable = true; })
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(lib.mkIf cfg.storage.enable {
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aux.system.raid.enable = true;
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boot.swraid.mdadmConf = ''
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ARRAY /dev/md/Sapana metadata=1.2 UUID=51076daf:efdb34dd:bce48342:3b549fcb
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MAILADDR ${cfg.storage.mailAddr}
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'';
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# Auto-unlock RAID array with a key file
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environment.etc."crypttab".text = lib.mkIf (cfg.storage.keyFile != "") ''
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storage /dev/md/Sapana ${toString cfg.storage.keyFile} nofail,keyfile-timeout=5s
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'';
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fileSystems."/storage" = {
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device = "/dev/mapper/storage";
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# Keep booting even if the array fails to unlock
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options = [ "nofail" ];
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};
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# Automatically scrub the array monthly
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systemd = {
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services."raid-scrub" = {
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description = "Periodically scrub RAID volumes for errors.";
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serviceConfig = {
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Type = "oneshot";
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User = "root";
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};
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script = "echo check > /sys/block/md127/md/sync_action";
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};
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timers."raid-scrub" = {
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description = "Periodically scrub RAID volumes for errors.";
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = "monthly";
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Persistent = true;
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Unit = "raid-scrub.service";
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};
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};
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};
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})
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];
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}
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