nixpkgs/nixos/modules/services/monitoring/prometheus/node-exporter.nix

82 lines
2.2 KiB
Nix

{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.prometheus.nodeExporter;
cmdlineArgs = cfg.extraFlags ++ [
"-web.listen-address=${cfg.listenAddress}"
];
in {
options = {
services.prometheus.nodeExporter = {
enable = mkEnableOption "prometheus node exporter";
port = mkOption {
type = types.int;
default = 9100;
description = ''
Port to listen on.
'';
};
listenAddress = mkOption {
type = types.string;
default = "0.0.0.0";
description = ''
Address to listen on.
'';
};
enabledCollectors = mkOption {
type = types.listOf types.string;
default = [];
example = ''[ "systemd" ]'';
description = ''
Collectors to enable, additionally to the defaults.
'';
};
extraFlags = mkOption {
type = types.listOf types.str;
default = [];
description = ''
Extra commandline options when launching the node exporter.
'';
};
openFirewall = mkOption {
type = types.bool;
default = false;
description = ''
Open port in firewall for incoming connections.
'';
};
};
};
config = mkIf cfg.enable {
networking.firewall.allowedTCPPorts = optional cfg.openFirewall cfg.port;
systemd.services.prometheus-node-exporter = {
description = "Prometheus exporter for machine metrics";
unitConfig.Documentation = "https://github.com/prometheus/node_exporter";
wantedBy = [ "multi-user.target" ];
script = ''
exec ${pkgs.prometheus-node-exporter}/bin/node_exporter \
${optionalString (cfg.enabledCollectors != [])
''-collectors.enabled ${concatStringsSep "," cfg.enabledCollectors}''} \
-web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
${concatStringsSep " \\\n " cfg.extraFlags}
'';
serviceConfig = {
User = "nobody";
Restart = "always";
PrivateTmp = true;
WorkingDirectory = /tmp;
ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
};
};
};
}