Create a debugging role.

nix/kubernetes/roles/debugging/default.nix

@@ -0,0 +1,33 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  options.me = {
+    debugging.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      example = true;
+      description = "Whether we want to install debugging.";
+    };
+  };
+
+  config = lib.mkIf config.me.debugging.enable {
+    environment.systemPackages = with pkgs; [
+      net-tools # for netstat
+      tcpdump
+      e2fsprogs # mkfs.ext4
+      gptfdisk # cgdisk
+      arp-scan # To find devices on the network
+      ldns # for drill
+    ];
+
+    networking.firewall.enable = false; # TODO: This is just here for debugging / initial development.
+    # TODO: Maybe use networking.nftables.enable to switch to nftables?
+  };
+}