nixos-servers/kubenix-modules/custom/tailscale.nix

{ lib, config, ... }: {
  options = with lib.types; {
    lab.tailscaleIngresses = lib.mkOption {
      type = attrsOf (submodule {
        options = {
          host = lib.mkOption { type = str; };

          service = {
            name = lib.mkOption { type = str; };

            portName = lib.mkOption {
              type = str;
              default = "web";
            };
          };
        };
      });

      default = { };
    };
  };

  config =
    let
      cfg = config.lab.tailscaleIngresses;

      mkTailscaleIngress = name: { host, service }: {
        spec = {
          ingressClassName = "tailscale";

          rules = [{
            http.paths = [{
              path = "/";
              pathType = "Prefix";

              backend.service = {
                name = service.name;
                port.name = service.portName;
              };
            }];
          }];

          tls = [{
            hosts = [ host ];
          }];
        };
      };
    in
    {
      kubernetes.resources.ingresses = builtins.mapAttrs mkTailscaleIngress cfg;
    };
}