service/acme: split from nginx

modules/services/acme/default.nix

@@ -0,0 +1,36 @@
+# automatic certificates
+{ config, lib, ... }:
+let
+  cfg = config.my.services.acme;
+  inherit (config.networking) domain;
+in
+{
+  options.my.services.acme = with lib; {
+    enable = mkEnableOption "ACME certificates";
+
+    credentialsFile = mkOption {
+      type = types.str;
+      example = "/var/lib/acme/creds.env";
+      description = ''
+        INWX API key file as an 'EnvironmentFile' (see `systemd.exec(5)`)
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    security.acme = {
+      defaults.email = "server@buehler.rocks";
+      # this is specially needed for inwx and does not work without it
+      defaults.dnsResolver = "ns.inwx.de";
+      acceptTerms = true;
+      # Use DNS wildcard certificate
+      certs = {
+        "${config.networking.domain}" = {
+          extraDomainNames = [ "*.${config.networking.domain}" ];
+          dnsProvider = "inwx";
+          inherit (cfg) credentialsFile;
+        };
+      };
+    };
+  };
+}

modules/services/default.nix

@@ -1,6 +1,7 @@
 { ... }:
 {
   imports = [
+    ./acme
     ./alertmanager
     ./aria2
     ./backup

modules/services/nginx/default.nix

@@ -448,24 +448,5 @@ in
     ];
     # Nginx needs to be able to read the certificates
     users.users.nginx.extraGroups = [ "acme" ];
-    security.acme = {
-      defaults.email = "server@buehler.rocks";
-      # this is specially needed for inwx and does not work without it
-      defaults.dnsResolver = "ns.inwx.de";
-      acceptTerms = true;
-      # Use DNS wildcard certificate
-      certs =
-        let
-          inherit (config.networking) domain;
-        in
-        with pkgs;
-        {
-          "${domain}" = {
-            extraDomainNames = [ "*.${domain}" ];
-            dnsProvider = "inwx";
-            inherit (cfg.acme) credentialsFile;
-          };
-        };
-    };
   };
 }