nixos/system/monitoring/metrics.nix

{ ... }:
{
  services.prometheus.exporters = {
    node = {
      enable = true;
      openFirewall = true;
      enabledCollectors = [
        "systemd"
        "logind"
      ];
    };
    smartctl = {
      enable = true;
      openFirewall = true;
      devices = [ "/dev/nvme0n1" ];
    };
  };
}