81 lines
2.2 KiB
Nix
81 lines
2.2 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. Only collectors explicitly listed here will be enabled.
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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 ${pkgs.prometheus-node-exporter}/bin/node_exporter \
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${optionalString (cfg.enabledCollectors != [])
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''-collectors.enabled ${concatStringsSep "," cfg.enabledCollectors}''} \
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-web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
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${concatStringsSep " \\\n " cfg.extraFlags}
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'';
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serviceConfig = {
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User = "nobody";
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Restart = "always";
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PrivateTmp = true;
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WorkingDirectory = /tmp;
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ExecReload = "${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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