0f0f0cbc6f
The behaviour have changed again. Listed collectors are now enabled in addition to the default one. Also run as DynmicUser instead of user nobody as the exporter doesn't need any state.
81 lines
2.1 KiB
Nix
81 lines
2.1 KiB
Nix
{ config, pkgs, lib, ... }:
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with lib;
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let
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cfg = config.services.prometheus.nodeExporter;
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cmdlineArgs = cfg.extraFlags ++ [
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"-web.listen-address=${cfg.listenAddress}"
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];
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in {
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options = {
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services.prometheus.nodeExporter = {
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enable = mkEnableOption "prometheus node exporter";
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port = mkOption {
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type = types.int;
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default = 9100;
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description = ''
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Port to listen on.
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'';
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};
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listenAddress = mkOption {
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type = types.string;
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default = "0.0.0.0";
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description = ''
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Address to listen on.
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'';
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};
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enabledCollectors = mkOption {
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type = types.listOf types.string;
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default = [];
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example = ''[ "systemd" ]'';
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description = ''
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Collectors to enable. The collectors listed here are enabled in addition to the default ones.
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'';
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};
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extraFlags = mkOption {
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type = types.listOf types.str;
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default = [];
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description = ''
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Extra commandline options when launching the node exporter.
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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 port in firewall for incoming connections.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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networking.firewall.allowedTCPPorts = optional cfg.openFirewall cfg.port;
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systemd.services.prometheus-node-exporter = {
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description = "Prometheus exporter for machine metrics";
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unitConfig.Documentation = "https://github.com/prometheus/node_exporter";
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wantedBy = [ "multi-user.target" ];
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script = ''
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exec ${pkgs.prometheus-node-exporter}/bin/node_exporter \
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${concatMapStrings (x: "--collector." + x + " ") cfg.enabledCollectors} \
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--web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
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${concatStringsSep " \\\n " cfg.extraFlags}
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'';
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serviceConfig = {
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DynamicUser = true;
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Restart = "always";
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PrivateTmp = true;
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WorkingDirectory = /tmp;
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ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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};
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};
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};
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}
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