{ config, lib, pkgs, ... }: let cfg = config.services.zabbixAgent; inherit (lib) mkDefault mkEnableOption mkIf mkOption; inherit (lib) attrValues concatMapStringsSep literalExample optionalString types; user = "zabbix-agent"; group = "zabbix-agent"; moduleEnv = pkgs.symlinkJoin { name = "zabbix-agent-module-env"; paths = attrValues cfg.modules; }; configFile = pkgs.writeText "zabbix_agent.conf" '' LogType = console Server = ${cfg.server} ListenIP = ${cfg.listen.ip} ListenPort = ${toString cfg.listen.port} ${optionalString (cfg.modules != {}) "LoadModulePath = ${moduleEnv}/lib"} ${concatMapStringsSep "\n" (name: "LoadModule = ${name}") (builtins.attrNames cfg.modules)} ${cfg.extraConfig} ''; in { # interface options = { services.zabbixAgent = { enable = mkEnableOption "the Zabbix Agent"; package = mkOption { type = types.package; default = pkgs.zabbix.agent; defaultText = "pkgs.zabbix.agent"; description = "The Zabbix package to use."; }; extraPackages = mkOption { type = types.listOf types.package; default = with pkgs; [ nettools ]; defaultText = "[ nettools ]"; example = "[ nettools mysql ]"; description = '' Packages to be added to the Zabbix PATH. Typically used to add executables for scripts, but can be anything. ''; }; modules = mkOption { type = types.attrsOf types.package; description = "A set of modules to load."; default = {}; example = literalExample '' { "dummy.so" = pkgs.stdenv.mkDerivation { name = "zabbix-dummy-module-''${cfg.package.version}"; src = cfg.package.src; buildInputs = [ cfg.package ]; sourceRoot = "zabbix-''${cfg.package.version}/src/modules/dummy"; installPhase = ''' mkdir -p $out/lib cp dummy.so $out/lib/ '''; }; } ''; }; server = mkOption { type = types.str; description = '' The IP address or hostname of the Zabbix server to connect to. ''; }; listen = { ip = mkOption { type = types.str; default = "0.0.0.0"; description = '' List of comma delimited IP addresses that the agent should listen on. ''; }; port = mkOption { type = types.port; default = 10050; description = '' Agent will listen on this port for connections from the server. ''; }; }; openFirewall = mkOption { type = types.bool; default = false; description = '' Open ports in the firewall for the Zabbix Agent. ''; }; # TODO: for bonus points migrate this to https://github.com/NixOS/rfcs/pull/42 extraConfig = mkOption { default = ""; type = types.lines; description = '' Configuration that is injected verbatim into the configuration file. Refer to for details on supported values. ''; }; }; }; # implementation config = mkIf cfg.enable { networking.firewall = mkIf cfg.openFirewall { allowedTCPPorts = [ cfg.listen.port ]; }; users.users.${user} = { description = "Zabbix Agent daemon user"; inherit group; }; users.groups.${group} = { }; systemd.services."zabbix-agent" = { description = "Zabbix Agent"; wantedBy = [ "multi-user.target" ]; path = [ "/run/wrappers" ] ++ cfg.extraPackages; serviceConfig = { ExecStart = "@${cfg.package}/sbin/zabbix_agentd zabbix_agentd -f --config ${configFile}"; Restart = "always"; RestartSec = 2; User = user; Group = group; PrivateTmp = true; }; }; }; }