infra/nixos/hosts/eidola/nebula.nix

{config, ...}: let
  netName = "m-infra";
  # https://github.com/NixOS/nixpkgs/blob/nixos-24.05/nixos/modules/services/networking/nebula.nix#L12
  userGroup = "nebula-${netName}";
  interface = "nebula.${netName}";
  lhs = {"10.13.0.1" = ["min.rip:4242"];}; # TODO: hardcoding
  lhsInt = builtins.attrNames lhs;
in {
  sops.secrets."nebula-key" = {
    mode = "0440";
    owner = userGroup;
    group = userGroup;
  };

  networking.firewall.trustedInterfaces = [interface];

  services.nebula.networks.${netName} = {
    ca = ../../keys/ca.crt;
    cert = ../../keys/n-srv-eidola.crt;
    key = config.sops.secrets."nebula-key".path;

    lighthouses = lhsInt;
    relays = lhsInt;
    staticHostMap = lhs;

    settings.punchy.punch = true;

    firewall.outbound = [
      {
        port = "any";
        proto = "any";
        host = "any";
      }
    ];

    firewall.inbound = [
      # Allow pings from anyone
      {
        port = "any";
        proto = "icmp";
        host = "any";
      }
      # Allow anything from `internal` group
      {
        port = "any";
        proto = "any";
        groups = ["internal"];
      }
      # Allow SSH from anyone
      {
        port = 22;
        proto = "tcp";
        host = "any";
      }
      # Allow `kube-apiserver` from anyone
      {
        port = 6443;
        proto = "tcp";
        host = "any";
      }
    ];
  };
}