nixos-config/configs/nixos/plover/modules/services/monitoring.nix

{ config, lib, pkgs, ... }:

let
  hostCfg = config.hosts.plover;
  cfg = hostCfg.services.monitoring;

  prometheusExports = config.services.prometheus.exporters;
in
{
  options.hosts.plover.services.monitoring.enable =
    lib.mkEnableOption "preferred monitoring stack";

  config = lib.mkIf cfg.enable (lib.mkMerge [
    {
      services.prometheus = {
        enable = true;

        exporters = {
          node = {
            enable = true;
            enabledCollectors = [ "systemd" ];
          };
        };

        scrapeConfigs = [
          {
            job_name = config.networking.hostName;
            static_configs = [{
              targets = [ "127.0.0.1:${builtins.toString prometheusExports.node.port}" ];
            }];
          }
        ];
      };
    }
  ]);
}