Add n8n service

modules/services/default.nix

@@ -6,6 +6,7 @@
     ./forgejo.nix
     ./immich.nix
     ./media-mgr.nix
+    ./n8n.nix
     ./nextcloud.nix
     ./paperless-ngx.nix
     ./plex.nix

modules/services/n8n.nix

@@ -0,0 +1,80 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.my.services.n8n;
+in
+{
+
+  options.my.services.n8n = {
+    enable = lib.mkEnableOption "Enable n8n module";
+
+    environment = lib.mkOption {
+      type = lib.types.attrsOf lib.types.str;
+      default = { };
+      description = "Extra environment variables for n8n";
+      example = {
+        N8N_PROTOCOL = "https";
+        WEBHOOK_URL = "https://n8n.example.com/";
+      };
+    };
+
+    proxy = {
+      enable = lib.mkEnableOption "Set the proxy entry for this service";
+
+      domain = lib.mkOption {
+        default = "example.com";
+        type = lib.types.str;
+        description = ''
+          The domain where Caddy is reachable
+        '';
+      };
+
+      subdomain = lib.mkOption {
+        default = "n8n";
+        type = lib.types.str;
+        description = ''
+          n8n subdomain
+        '';
+      };
+
+      host = lib.mkOption {
+        default = "localhost";
+        type = lib.types.str;
+        description = ''
+          host name where the service is running
+        '';
+      };
+
+    };
+  };
+
+  config = lib.mkMerge [
+    (lib.mkIf cfg.enable {
+
+      services.n8n = {
+        enable = true;
+        openFirewall = true;
+        environment = {
+          GENERIC_TIMEZONE = "Europe/Rome";
+          N8N_PROTOCOL = "https";
+          WEBHOOK_URL = "https://${cfg.proxy.subdomain}.${cfg.proxy.domain}/";
+        } // cfg.environment;
+      };
+
+    })
+
+    (lib.mkIf cfg.proxy.enable {
+      services.caddy = with cfg.proxy; {
+        virtualHosts."${subdomain}.${domain}".extraConfig = ''
+          reverse_proxy http://${host}:${services.n8n.environment.N8N_PORT}
+          import cloudflare_${domain}
+        '';
+
+      };
+    })
+  ];
+}