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|
{ 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 ];
}
|
