{ 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" "c1" ];
  };

  mkCompute = host:
  let
    hw = ./hardware-configuration.d + "/${host.name}.nix";
  in {
    "${host.name}" = {
      cluster = {
        compute = true;
        k8sNode = true;
        mounts = {
          rdma.enable = false;
          gbe100.enable = true;
          automount.enable = true;
          users = true;
          opt = true;
          work = true;
          data = true;
          backup = false;
          ceph = true;
        };
      };

      features = {
        host = {
          name = host.name;
          address = host.address;
        };
        os.externalInterface = "eno33np0";
        hpc.compute = true;
        # k8s = { inherit etcdCluster; };
      };

      deployment.targetHost = host.target;

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

      # boot.kernel.sysctl = {
      #    "net.ipv4.tcp_timestamps" = 0;
      #    "net.ipv4.tcp_sack" = 1;
      #    "net.core.netdev_max_backlog" = 250000;
      #    "net.core.rmem_max" = 4194304;
      #    "net.core.wmem_max" = 4194304;
      #    "net.core.rmem_default" = 4194304;
      #    "net.core.wmem_default" = 4194304;
      #    "net.core.optmem_max" = 4194304;
      #    "net.ipv4.tcp_rmem" = "4096 87380 4194304";
      #    "net.ipv4.tcp_wmem" = "4096 65536 4194304";
      #    "net.ipv4.tcp_low_latency" = 1;
      #    "net.ipv4.tcp_adv_win_scale" = 1;
      # };

      networking = {
        hostName = host.name;
        useDHCP = false;
        interfaces.eno33np0 = {
          useDHCP = false;
          ipv4.addresses = [ {
            address = host.address;
            prefixLength = 24;
          } ];
          ipv4.routes = [ {
            address = "10.255.242.0";
            prefixLength = 24;
            via = "10.255.241.100";
          } ];

        };
        # interfaces.ibp65s0 = {
        #   useDHCP = false;
        #   ipv4.addresses = [ {
        #     address = host.ipoib;
        #     prefixLength = 24;
        #   } ];
        # };
        interfaces.enp65s0np0 = {
          useDHCP = false;
          ipv4.addresses = [ {
            address = host.gbe100;
            prefixLength = 24;
          } ];
        };
        # firewall.extraCommands =
          # if host.name == "c1-1" then ''
          #   iptables -t nat -A POSTROUTING -d 10.255.244.0/24 -j MASQUERADE
          # ''
          # else "";
      };
      imports = [
          hw
          ../default.nix
          ../mounts.nix
      ];
    }
    // compute;
};
in builtins.foldl' (a: n: a // mkCompute n) {} nodes