diff options
Diffstat (limited to 'nixpkgs/nixos/modules/services/monitoring/watchdogd.nix')
-rw-r--r-- | nixpkgs/nixos/modules/services/monitoring/watchdogd.nix | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/services/monitoring/watchdogd.nix b/nixpkgs/nixos/modules/services/monitoring/watchdogd.nix new file mode 100644 index 000000000000..e8d104651c6a --- /dev/null +++ b/nixpkgs/nixos/modules/services/monitoring/watchdogd.nix @@ -0,0 +1,131 @@ +{ config, lib, pkgs, ... }: +with lib; +let + cfg = config.services.watchdogd; + + mkPluginOpts = plugin: defWarn: defCrit: { + enabled = mkEnableOption "watchdogd plugin ${plugin}"; + interval = mkOption { + type = types.ints.unsigned; + default = 300; + description = '' + Amount of seconds between every poll. + ''; + }; + logmark = mkOption { + type = types.bool; + default = false; + description = '' + Whether to log current stats every poll interval. + ''; + }; + warning = mkOption { + type = types.numbers.nonnegative; + default = defWarn; + description = '' + The high watermark level. Alert sent to log. + ''; + }; + critical = mkOption { + type = types.numbers.nonnegative; + default = defCrit; + description = '' + The critical watermark level. Alert sent to log, followed by reboot or script action. + ''; + }; + }; +in { + options.services.watchdogd = { + enable = mkEnableOption "watchdogd, an advanced system & process supervisor"; + package = mkPackageOption pkgs "watchdogd" { }; + + settings = mkOption { + type = with types; submodule { + freeformType = let + valueType = oneOf [ + bool + int + float + str + ]; + in attrsOf (either valueType (attrsOf valueType)); + + options = { + timeout = mkOption { + type = types.ints.unsigned; + default = 15; + description = '' + The WDT timeout before reset. + ''; + }; + interval = mkOption { + type = types.ints.unsigned; + default = 5; + description = '' + The kick interval, i.e. how often {manpage}`watchdogd(8)` should reset the WDT timer. + ''; + }; + + safe-exit = mkOption { + type = types.bool; + default = true; + description = '' + With {var}`safeExit` enabled, the daemon will ask the driver to disable the WDT before exiting. + However, some WDT drivers (or hardware) may not support this. + ''; + }; + + filenr = mkPluginOpts "filenr" 0.9 1.0; + + loadavg = mkPluginOpts "loadavg" 1.0 2.0; + + meminfo = mkPluginOpts "meminfo" 0.9 0.95; + }; + }; + default = { }; + description = '' + Configuration to put in {file}`watchdogd.conf`. + See {manpage}`watchdogd.conf(5)` for more details. + ''; + }; + }; + + config = let + toConfig = attrs: concatStringsSep "\n" (mapAttrsToList toValue attrs); + + toValue = name: value: + if isAttrs value + then pipe value [ + (mapAttrsToList toValue) + (map (s: " ${s}")) + (concatStringsSep "\n") + (s: "${name} {\n${s}\n}") + ] + else if isBool value + then "${name} = ${boolToString value}" + else if any (f: f value) [isString isInt isFloat] + then "${name} = ${toString value}" + else throw '' + Found invalid type in `services.watchdogd.settings`: '${typeOf value}' + ''; + + watchdogdConf = pkgs.writeText "watchdogd.conf" (toConfig cfg.settings); + in mkIf cfg.enable { + environment.systemPackages = [ cfg.package ]; + + systemd.services.watchdogd = { + documentation = [ + "man:watchdogd(8)" + "man:watchdogd.conf(5)" + ]; + wantedBy = [ "multi-user.target" ]; + description = "Advanced system & process supervisor"; + serviceConfig = { + Type = "simple"; + ExecStart = "${cfg.package}/bin/watchdogd -n -f ${watchdogdConf}"; + }; + }; + }; + + meta.maintainers = with maintainers; [ vifino ]; +} |