pyrox.dev
1{ config, pkgs, lib, ... }:
2
3with lib;
4
5let
6 cfg = config.services.collectd;
7
8 conf = pkgs.writeText "collectd.conf" ''
9 BaseDir "${cfg.dataDir}"
10 AutoLoadPlugin ${boolToString cfg.autoLoadPlugin}
11 Hostname "${config.networking.hostName}"
12
13 LoadPlugin syslog
14 <Plugin "syslog">
15 LogLevel "info"
16 NotifyLevel "OKAY"
17 </Plugin>
18
19 ${concatStrings (mapAttrsToList (plugin: pluginConfig: ''
20 LoadPlugin ${plugin}
21 <Plugin "${plugin}">
22 ${pluginConfig}
23 </Plugin>
24 '') cfg.plugins)}
25
26 ${concatMapStrings (f: ''
27 Include "${f}"
28 '') cfg.include}
29
30 ${cfg.extraConfig}
31 '';
32
33 package =
34 if cfg.buildMinimalPackage
35 then minimalPackage
36 else cfg.package;
37
38 minimalPackage = cfg.package.override {
39 enabledPlugins = [ "syslog" ] ++ builtins.attrNames cfg.plugins;
40 };
41
42in {
43 options.services.collectd = with types; {
44 enable = mkEnableOption "collectd agent";
45
46 package = mkOption {
47 default = pkgs.collectd;
48 defaultText = literalExpression "pkgs.collectd";
49 description = ''
50 Which collectd package to use.
51 '';
52 type = types.package;
53 };
54
55 buildMinimalPackage = mkOption {
56 default = false;
57 description = ''
58 Build a minimal collectd package with only the configured `services.collectd.plugins`
59 '';
60 type = bool;
61 };
62
63 user = mkOption {
64 default = "collectd";
65 description = ''
66 User under which to run collectd.
67 '';
68 type = nullOr str;
69 };
70
71 dataDir = mkOption {
72 default = "/var/lib/collectd";
73 description = ''
74 Data directory for collectd agent.
75 '';
76 type = path;
77 };
78
79 autoLoadPlugin = mkOption {
80 default = false;
81 description = ''
82 Enable plugin autoloading.
83 '';
84 type = bool;
85 };
86
87 include = mkOption {
88 default = [];
89 description = ''
90 Additional paths to load config from.
91 '';
92 type = listOf str;
93 };
94
95 plugins = mkOption {
96 default = {};
97 example = { cpu = ""; memory = ""; network = "Server 192.168.1.1 25826"; };
98 description = ''
99 Attribute set of plugin names to plugin config segments
100 '';
101 type = attrsOf lines;
102 };
103
104 extraConfig = mkOption {
105 default = "";
106 description = ''
107 Extra configuration for collectd.
108 '';
109 type = lines;
110 };
111
112 };
113
114 config = mkIf cfg.enable {
115 systemd.tmpfiles.rules = [
116 "d '${cfg.dataDir}' - ${cfg.user} - - -"
117 ];
118
119 systemd.services.collectd = {
120 description = "Collectd Monitoring Agent";
121 after = [ "network.target" ];
122 wantedBy = [ "multi-user.target" ];
123
124 serviceConfig = {
125 ExecStart = "${package}/sbin/collectd -C ${conf} -f";
126 User = cfg.user;
127 Restart = "on-failure";
128 RestartSec = 3;
129 };
130 };
131
132 users.users = optionalAttrs (cfg.user == "collectd") {
133 collectd = {
134 isSystemUser = true;
135 };
136 };
137 };
138}