209 lines
4.9 KiB
Nix
209 lines
4.9 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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let
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cfg = config.services.zabbixAgent;
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inherit (lib)
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mkDefault
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mkEnableOption
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mkPackageOption
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mkIf
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mkMerge
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mkOption
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;
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inherit (lib)
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attrValues
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concatMapStringsSep
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literalExpression
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optionalString
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types
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;
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inherit (lib.generators) toKeyValue;
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user = "zabbix-agent";
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group = "zabbix-agent";
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moduleEnv = pkgs.symlinkJoin {
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name = "zabbix-agent-module-env";
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paths = attrValues cfg.modules;
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};
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configFile = pkgs.writeText "zabbix_agent.conf" (
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toKeyValue { listsAsDuplicateKeys = true; } cfg.settings
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);
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in
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{
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imports = [
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(lib.mkRemovedOptionModule [
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"services"
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"zabbixAgent"
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"extraConfig"
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] "Use services.zabbixAgent.settings instead.")
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];
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# interface
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options = {
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services.zabbixAgent = {
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enable = mkEnableOption "the Zabbix Agent";
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package = mkPackageOption pkgs [ "zabbix" "agent" ] { };
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extraPackages = mkOption {
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type = types.listOf types.package;
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default = with pkgs; [ nettools ];
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defaultText = literalExpression "with pkgs; [ nettools ]";
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example = literalExpression "with pkgs; [ nettools mysql ]";
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description = ''
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Packages to be added to the Zabbix {env}`PATH`.
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Typically used to add executables for scripts, but can be anything.
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'';
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};
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modules = mkOption {
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type = types.attrsOf types.package;
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description = "A set of modules to load.";
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default = { };
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example = literalExpression ''
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{
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"dummy.so" = pkgs.stdenv.mkDerivation {
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name = "zabbix-dummy-module-''${cfg.package.version}";
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src = cfg.package.src;
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buildInputs = [ cfg.package ];
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sourceRoot = "zabbix-''${cfg.package.version}/src/modules/dummy";
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installPhase = '''
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mkdir -p $out/lib
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cp dummy.so $out/lib/
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''';
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};
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}
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'';
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};
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server = mkOption {
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type = types.str;
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description = ''
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The IP address or hostname of the Zabbix server to connect to.
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'';
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};
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listen = {
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ip = mkOption {
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type = types.str;
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default = "0.0.0.0";
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description = ''
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List of comma delimited IP addresses that the agent should listen on.
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'';
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};
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port = mkOption {
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type = types.port;
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default = 10050;
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description = ''
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Agent will listen on this port for connections from the server.
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'';
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};
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};
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openFirewall = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Open ports in the firewall for the Zabbix Agent.
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'';
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};
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settings = mkOption {
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type =
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with types;
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attrsOf (oneOf [
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int
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str
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(listOf str)
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]);
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default = { };
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description = ''
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Zabbix Agent configuration. Refer to
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<https://www.zabbix.com/documentation/current/manual/appendix/config/zabbix_agentd>
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for details on supported values.
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'';
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example = {
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Hostname = "example.org";
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DebugLevel = 4;
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};
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};
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};
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};
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# implementation
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config = mkIf cfg.enable {
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services.zabbixAgent.settings = mkMerge [
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{
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LogType = "console";
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Server = cfg.server;
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ListenPort = cfg.listen.port;
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}
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(mkIf (cfg.modules != { }) {
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LoadModule = builtins.attrNames cfg.modules;
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LoadModulePath = "${moduleEnv}/lib";
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})
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# the default value for "ListenIP" is 0.0.0.0 but zabbix agent 2 cannot accept configuration files which
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# explicitly set "ListenIP" to the default value...
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(mkIf (cfg.listen.ip != "0.0.0.0") { ListenIP = cfg.listen.ip; })
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];
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networking.firewall = mkIf cfg.openFirewall {
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allowedTCPPorts = [ cfg.listen.port ];
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};
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users.users.${user} = {
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description = "Zabbix Agent daemon user";
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inherit group;
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isSystemUser = true;
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};
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users.groups.${group} = { };
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systemd.services.zabbix-agent = {
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description = "Zabbix Agent";
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wantedBy = [ "multi-user.target" ];
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# https://www.zabbix.com/documentation/current/manual/config/items/userparameters
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# > User parameters are commands executed by Zabbix agent.
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# > /bin/sh is used as a command line interpreter under UNIX operating systems.
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path =
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with pkgs;
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[
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bash
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"/run/wrappers"
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]
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++ cfg.extraPackages;
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serviceConfig = {
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ExecStart = "@${cfg.package}/sbin/zabbix_agentd zabbix_agentd -f --config ${configFile}";
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Restart = "always";
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RestartSec = 2;
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User = user;
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Group = group;
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PrivateTmp = true;
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};
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};
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};
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}
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