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