{ pkgs ? import <nixpkgs> {} }:
let
  # Pin the deployment package-set to a specific version of nixpkgs
  # pkgs = import (builtins.fetchTarball {
  #   url = "https://github.com/NixOS/nixpkgs/archive/e6377ff35544226392b49fa2cf05590f9f0c4b43.tar.gz";
  #   sha256 = "1fra9wwy5gvj5ibayqkzqpwdf715bggc0qbmrfch4fghwvl5m70l";
  # }) {};
  # pkgs = import <nixpkgs> {};

  nodes = import ./nodes.nix;

  compute = {
    deployment.tags = [ "compute" "c0" "cluster" ];
  };

  mkCompute = host:
  let
    hw = ./hardware-configuration.d + "/${host.name}.nix";
  in {
    "${host.name}" = {
      cluster = {
        compute = true;
        k8sNode = true;
        mounts = {
          rdma.enable = false;
          automount.enable = true;
          users = true;
          opt = true;
          work = true;
          data = true;
          ceph = true;
        };
      };

      features = {
        host = {
          name = host.name;
          address = host.address;
        };
        os.networkmanager.enable = false;
        os.externalInterface = host.iface;
        hpc.computeNode = true;
        # hpc.knem = true;
      };

      deployment.targetHost = host.address;

      # services.udev.extraRules = ''
      #   KERNEL=="ibp1s0", SUBSYSTEM=="net", ATTR{create_child}:="0x7666"
      # '';

      networking = {
        useNetworkd = true;
        hostName = host.name;
        useDHCP = false;
      };

      # systemd.services.systemd-networkd-wait-online.enable =  false;

      systemd.network.wait-online.ignoredInterfaces = [ "ibp1s0" ];
      systemd.network = {
        # wait-online.enable = false;
        networks = {
          "40-${host.iface}" = {
            matchConfig.Name = host.iface;
            address = [ "${host.address}/24" ];
            routes = [ { Gateway = "172.16.239.1"; } ];
          };
        # "ibp1s0.7666" = {
          "45-ibp1s0" = {
            matchConfig.Name = "ibp1s0";
            address = [ "${host.ipoib}/24" ];
          };
        };
      };

      imports = [
          hw
          ../default.nix
          ../mounts.nix
          #./kernel.nix
      ];
    }
    // compute;
};
in builtins.foldl' (a: n: a // mkCompute n) {} nodes