{ config
, lib
, pkgs
, modulesPath
, system
, inputs
, ...
}: {
  # TODO allow primary/node config option to listen/send metrics to central location
  services.netdata = {
    enable = true;
    package = pkgs.unstable-pkgs.netdata;
    python = {
      enable = true;

      extraPackages = ps: [
        ps.psycopg2
        ps.docker
        ps.dnspython
      ];
    };

    config = {
      global = {
        # uncomment to reduce memory to 32 MB
        #"page cache size" = 32;

        # update interval
        "update every" = 2;
      };
      db = {
        "update every" = 2;
        "storage tiers" = 3;
        "dbengine multihost disk space MB" = 1024;
        "dbengine tier 1 multihost disk space MB" = 1024;
        "dbengine tier 2 multihost disk space MB" = 512;
        "cleanup obsolete charts after secs" = 600;
      };
      plugins = {
        "go.d" = "yes";
      };
      ml = {
        # enable machine learning
        "enabled" = "yes";
      };
    };

    configDir = {
      "stream.conf" = pkgs.writeText "stream.conf" ''
        [8fcb63b3-8361-4339-a010-fc459c2132b0]
        enabled = yes
        default history = 36000
        default memory mode = dbengine
        health enabled by default = auto
        allow from = 192.*
      '';
    };
  };

  networking.firewall.allowedTCPPortRanges = [
    {
      from = 19999;
      to = 19999;
    } # netdata
  ];
}