{ config, lib, pkgs, ... }: with builtins; with import <stockholm/lib>; let cfg = config.krebs.monit; out = { options.krebs.monit = api; config = mkIf cfg.enable imp; }; api = { enable = mkEnableOption "monit"; http = { enable = mkEnableOption "monit http server"; port = mkOption { type = types.int; default = 9093; }; user = mkOption { type = types.str; default = "krebs"; }; pass = mkOption { type = types.str; default = "bob"; }; }; user = mkOption { type = types.user; default = { name = "monit"; }; }; group = mkOption { type = types.group; default = { name = "monitor"; }; }; extraConfig = mkOption { type = types.attrs; default = {}; }; alarms = mkOption { default = {}; type = with types; attrsOf (submodule { options = { test = mkOption { type = either path str; }; alarm = mkOption { type = either path str; }; interval = mkOption { type = str; default = "10"; }; }; }); }; }; imp = let configFile = pkgs.writeText "monit.cfg" '' ${optionalString cfg.http.enable '' set httpd port ${toString cfg.http.port} allow ${cfg.http.user}:${cfg.http.pass} ''} set daemon 10 ${concatStringsSep "\n" (mapAttrsToList (name: alarm: '' check program ${name} with path "${alarm.test}" every ${alarm.interval} cycles if status != 0 then exec "${alarm.alarm}" '') cfg.alarms)} ''; in { environment.etc = [ { source = configFile; target = "monit.conf"; mode = "0400"; uid = config.users.users.${cfg.user.name}.uid; } ]; users = { groups.${cfg.group.name} = { inherit (cfg.group) name gid; }; users.${cfg.user.name} = { inherit (cfg.user) home name uid; createHome = true; group = cfg.group.name; }; }; systemd.services.monit = { description = "monit"; after = [ "network.target" ]; wantedBy = [ "multi-user.target" ]; restartIfChanged = true; serviceConfig = { Restart = "always"; User = cfg.user.name; ExecStart = "${pkgs.monit}/bin/monit -I -c /etc/monit.conf"; # Monit should restart when the config changes ExecStartPre = "${pkgs.coreutils}/bin/echo ${configFile}"; }; }; }; in out