ryan
4e46f3e0fc
Systant is designed as a userspace controller rather than a system daemon, so it makes more sense to run as a user service with access to the user's environment, PATH, and session (for audio control, etc). Changes: - Remove user/group options (runs as current user) - Use systemd.user.services instead of systemd.services - Remove hardening options (not needed and would restrict access) - Add package to environment.systemPackages Enable with: systemctl --user enable --now systant Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
87 lines
2.4 KiB
Nix
87 lines
2.4 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.systant;
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settingsFormat = pkgs.formats.toml { };
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configFile =
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if cfg.configFile != null
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then cfg.configFile
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else if cfg.settings != { }
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then settingsFormat.generate "systant-config.toml" cfg.settings
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else null;
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in
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{
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options.systant = {
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enable = lib.mkEnableOption "systant system monitoring agent";
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package = lib.mkOption {
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type = lib.types.package;
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default = pkgs.systant;
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defaultText = lib.literalExpression "pkgs.systant";
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description = "The systant package to use.";
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};
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configFile = lib.mkOption {
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type = lib.types.nullOr lib.types.path;
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default = null;
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description = ''
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Path to the systant configuration file (TOML).
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If set, this takes precedence over the settings option.
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'';
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};
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settings = lib.mkOption {
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type = settingsFormat.type;
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default = { };
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description = ''
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Configuration for systant in Nix attribute set form.
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Will be converted to TOML. Ignored if configFile is set.
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'';
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example = lib.literalExpression ''
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{
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mqtt = {
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broker = "mqtt://localhost:1883";
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topicPrefix = "systant";
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};
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entities = {
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cpu_usage = {
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type = "sensor";
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state_command = "awk '/^cpu / {u=$2+$4; t=$2+$4+$5; print int(u*100/t)}' /proc/stat";
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unit = "%";
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icon = "mdi:cpu-64-bit";
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name = "CPU Usage";
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};
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};
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homeassistant = {
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discovery = true;
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discoveryPrefix = "homeassistant";
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};
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}
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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# Make the package available system-wide
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environment.systemPackages = [ cfg.package ];
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# Systemd user service - runs in user session with user's environment
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systemd.user.services.systant = {
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description = "Systant system monitoring agent";
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wantedBy = [ "default.target" ];
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after = [ "network-online.target" ];
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wants = [ "network-online.target" ];
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serviceConfig = {
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Type = "simple";
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ExecStart =
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if configFile != null
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then "${cfg.package}/bin/systant run --config ${configFile}"
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else "${cfg.package}/bin/systant run";
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Restart = "on-failure";
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RestartSec = "5s";
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};
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};
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};
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}
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