{ config, pkgs, lib, ... }: with lib; let cfg = config.services.collectd; conf = pkgs.writeText "collectd.conf" '' BaseDir "${cfg.dataDir}" AutoLoadPlugin ${boolToString cfg.autoLoadPlugin} Hostname "${config.networking.hostName}" LoadPlugin syslog LogLevel "info" NotifyLevel "OKAY" ${concatStrings (mapAttrsToList (plugin: pluginConfig: '' LoadPlugin ${plugin} ${pluginConfig} '') cfg.plugins)} ${concatMapStrings (f: '' Include "${f}" '') cfg.include} ${cfg.extraConfig} ''; package = if cfg.buildMinimalPackage then minimalPackage else cfg.package; minimalPackage = cfg.package.override { enabledPlugins = [ "syslog" ] ++ builtins.attrNames cfg.plugins; }; in { options.services.collectd = with types; { enable = mkEnableOption "collectd agent"; package = mkOption { default = pkgs.collectd; defaultText = "pkgs.collectd"; description = '' Which collectd package to use. ''; type = types.package; }; buildMinimalPackage = mkOption { default = false; description = '' Build a minimal collectd package with only the configured `services.collectd.plugins` ''; type = types.bool; }; user = mkOption { default = "collectd"; description = '' User under which to run collectd. ''; type = nullOr str; }; dataDir = mkOption { default = "/var/lib/collectd"; description = '' Data directory for collectd agent. ''; type = path; }; autoLoadPlugin = mkOption { default = false; description = '' Enable plugin autoloading. ''; type = bool; }; include = mkOption { default = []; description = '' Additional paths to load config from. ''; type = listOf str; }; plugins = mkOption { default = {}; example = { cpu = ""; memory = ""; network = "Server 192.168.1.1 25826"; }; description = '' Attribute set of plugin names to plugin config segments ''; type = types.attrsOf types.str; }; extraConfig = mkOption { default = ""; description = '' Extra configuration for collectd. ''; type = lines; }; }; config = mkIf cfg.enable { systemd.tmpfiles.rules = [ "d '${cfg.dataDir}' - ${cfg.user} - - -" ]; systemd.services.collectd = { description = "Collectd Monitoring Agent"; after = [ "network.target" ]; wantedBy = [ "multi-user.target" ]; serviceConfig = { ExecStart = "${package}/sbin/collectd -C ${conf} -f"; User = cfg.user; Restart = "on-failure"; RestartSec = 3; }; }; users.users = optional (cfg.user == "collectd") { name = "collectd"; isSystemUser = true; }; }; }