os/srv/nginx.nix


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{
  config,
  lib,
  pkgs,
  ...
}:

let
  cfg = config.os.srv.nginx;
in
{
  options.os.srv.nginx = {
    enable = lib.mkEnableOption "the NGINX reverse proxy service";

    openFirewall = lib.mkOption {
      type = lib.types.bool;
      default = true;
      description = "Whether to open ports 80 and 443 in the firewall.";
    };
  };

  config = lib.mkMerge [
    {
      _module.args.securityTemplates.restrictToInternal = ''
        allow 127.0.0.1;
        allow ::1;

        allow ${config.os.core.network.lan.range};
        allow ${config.os.core.network.wg.range};
        allow ${config.os.core.network.hs.range};

        deny all;
      '';
    }

    (lib.mkIf cfg.enable {
      services.nginx = {
        enable = true;
        package = pkgs.nginx.override { openssl = pkgs.libressl; };

        recommendedProxySettings = true;
        recommendedTlsSettings = true;
        recommendedOptimisation = true;
        recommendedGzipSettings = true;
        virtualHosts = {
          default = {
            serverName = "_";
            default = true;
            rejectSSL = true;
            locations."/".return = "444";
          };
        };
      };

      security.acme = {
        acceptTerms = true;
        defaults.email = "adikro@disroot.org";
      };

      users.users.nginx.extraGroups = [ "acme" ];

      networking.firewall.allowedTCPPorts = lib.mkIf cfg.openFirewall [
        80
        443
      ];

      systemd.tmpfiles.rules = [
        "d /var/log/nginx 0750 nginx adm -"
      ];
    })
  ];
}