132 lines
3.6 KiB
Nix
132 lines
3.6 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.watchdogd;
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mkPluginOpts = plugin: defWarn: defCrit: {
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enabled = mkEnableOption "watchdogd plugin ${plugin}";
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interval = mkOption {
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type = types.ints.unsigned;
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default = 300;
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description = ''
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Amount of seconds between every poll.
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'';
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};
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logmark = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to log current stats every poll interval.
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'';
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};
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warning = mkOption {
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type = types.numbers.nonnegative;
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default = defWarn;
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description = ''
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The high watermark level. Alert sent to log.
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'';
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};
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critical = mkOption {
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type = types.numbers.nonnegative;
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default = defCrit;
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description = ''
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The critical watermark level. Alert sent to log, followed by reboot or script action.
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'';
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};
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};
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in {
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options.services.watchdogd = {
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enable = mkEnableOption "watchdogd, an advanced system & process supervisor";
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package = mkPackageOption pkgs "watchdogd" { };
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settings = mkOption {
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type = with types; submodule {
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freeformType = let
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valueType = oneOf [
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bool
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int
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float
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str
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];
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in attrsOf (either valueType (attrsOf valueType));
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options = {
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timeout = mkOption {
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type = types.ints.unsigned;
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default = 15;
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description = ''
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The WDT timeout before reset.
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'';
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};
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interval = mkOption {
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type = types.ints.unsigned;
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default = 5;
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description = ''
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The kick interval, i.e. how often {manpage}`watchdogd(8)` should reset the WDT timer.
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'';
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};
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safe-exit = mkOption {
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type = types.bool;
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default = true;
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description = ''
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With {var}`safeExit` enabled, the daemon will ask the driver to disable the WDT before exiting.
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However, some WDT drivers (or hardware) may not support this.
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'';
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};
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filenr = mkPluginOpts "filenr" 0.9 1.0;
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loadavg = mkPluginOpts "loadavg" 1.0 2.0;
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meminfo = mkPluginOpts "meminfo" 0.9 0.95;
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};
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};
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default = { };
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description = ''
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Configuration to put in {file}`watchdogd.conf`.
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See {manpage}`watchdogd.conf(5)` for more details.
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'';
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};
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};
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config = let
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toConfig = attrs: concatStringsSep "\n" (mapAttrsToList toValue attrs);
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toValue = name: value:
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if isAttrs value
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then pipe value [
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(mapAttrsToList toValue)
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(map (s: " ${s}"))
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(concatStringsSep "\n")
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(s: "${name} {\n${s}\n}")
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]
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else if isBool value
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then "${name} = ${boolToString value}"
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else if any (f: f value) [isString isInt isFloat]
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then "${name} = ${toString value}"
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else throw ''
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Found invalid type in `services.watchdogd.settings`: '${typeOf value}'
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'';
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watchdogdConf = pkgs.writeText "watchdogd.conf" (toConfig cfg.settings);
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in mkIf cfg.enable {
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environment.systemPackages = [ cfg.package ];
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systemd.services.watchdogd = {
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documentation = [
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"man:watchdogd(8)"
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"man:watchdogd.conf(5)"
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];
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wantedBy = [ "multi-user.target" ];
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description = "Advanced system & process supervisor";
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serviceConfig = {
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Type = "simple";
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ExecStart = "${cfg.package}/bin/watchdogd -n -f ${watchdogdConf}";
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};
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};
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};
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meta.maintainers = with maintainers; [ vifino ];
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}
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