config/modules/services/ping_exporter/default.nix

{
  config,
  lib,
  myData,
  ...
}:
let
  cfg = config.mj.services.ping_exporter;
in
{
  options.mj.services.ping_exporter = with lib.types; {
    enable = lib.mkEnableOption "Enable ping_exporter";
  };

  config = lib.mkIf cfg.enable {
    services.prometheus.exporters.ping = {
      enable = true;
      settings = {
        options.disableIPv6 = true;
        ping = {
          interval = "1s";
          timeout = "5s";
          history-size = 10;
        };
        targets = [
          "1.1.1.1"
          "8.8.4.4"
          "9.9.9.9"

          # NB: make sure only 1 ip address is returned for DNS domains
          "fb.com"
          "lrt.lt"
          "bite.lt"
          "github.com"

          "jakstys.lt"
          "fra1-b.jakstys.lt"
        ];
      };
    };

    mj.services.friendlyport.ports = [
      {
        subnets = [ myData.subnets.tailscale.cidr ];
        tcp = [ config.services.prometheus.exporters.ping.port ];
      }
    ];
  };
}