From 452afd70c1701fbb229a3c4c25fa7f46a21c7c5d Mon Sep 17 00:00:00 2001
From: Noah Masur <7386960+nmasur@users.noreply.github.com>
Date: Mon, 6 May 2024 14:26:24 -0400
Subject: [PATCH] enable n8n on arrow

---
 flake.nix                      |  1 +
 hosts/arrow/modules.nix        |  1 +
 modules/common/default.nix     |  4 ++++
 modules/nixos/services/n8n.nix | 19 +++++++------------
 4 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/flake.nix b/flake.nix
index aa1d0a3..67135ac 100644
--- a/flake.nix
+++ b/flake.nix
@@ -233,6 +233,7 @@
             irc = "irc.${baseName}";
             metrics = "metrics.${baseName}";
             minecraft = "minecraft.${baseName}";
+            n8n = "n8n.${baseName}";
             prometheus = "prom.${baseName}";
             paperless = "paper.${baseName}";
             secrets = "vault.${baseName}";
diff --git a/hosts/arrow/modules.nix b/hosts/arrow/modules.nix
index 55af5c0..05f90b2 100644
--- a/hosts/arrow/modules.nix
+++ b/hosts/arrow/modules.nix
@@ -22,6 +22,7 @@
     cloudflare.enable = true;
     services.openssh.enable = true;
     services.caddy.enable = true;
+    services.n8n.enable = true;
 
     # nix-index seems to eat up too much memory for Vultr
     home-manager.users.${globals.user}.programs.nix-index.enable = inputs.nixpkgs.lib.mkForce false;
diff --git a/modules/common/default.nix b/modules/common/default.nix
index a885847..7084193 100644
--- a/modules/common/default.nix
+++ b/modules/common/default.nix
@@ -125,6 +125,10 @@
         type = lib.types.str;
         description = "Hostname for IRC services.";
       };
+      n8n = lib.mkOption {
+        type = lib.types.str;
+        description = "Hostname for n8n automation.";
+      };
       transmission = lib.mkOption {
         type = lib.types.str;
         description = "Hostname for peer2peer downloads (Transmission).";
diff --git a/modules/nixos/services/n8n.nix b/modules/nixos/services/n8n.nix
index 35cbcfb..5665e99 100644
--- a/modules/nixos/services/n8n.nix
+++ b/modules/nixos/services/n8n.nix
@@ -4,18 +4,9 @@
 { config, lib, ... }:
 {
 
-  options = {
-    n8nServer = lib.mkOption {
-      type = lib.types.nullOr lib.types.str;
-      description = "Hostname for n8n automation";
-      default = null;
-    };
-  };
-
-  config = lib.mkIf (config.n8nServer != null) {
+  config = lib.mkIf config.services.n8n.enable {
 
     services.n8n = {
-      enable = true;
       settings = {
         n8n = {
           listenAddress = "127.0.0.1";
@@ -24,13 +15,17 @@
       };
     };
 
+    # Configure Cloudflare DNS to point to this machine
+    services.cloudflare-dyndns.domains = [ config.hostnames.n8n ];
+
+    # Allow web traffic to Caddy
     caddy.routes = [
       {
-        match = [ { host = [ config.n8nServer ]; } ];
+        match = [ { host = [ config.hostnames.n8n ]; } ];
         handle = [
           {
             handler = "reverse_proxy";
-            upstreams = [ { dial = "localhost:5678"; } ];
+            upstreams = [ { dial = "localhost:${builtins.toString config.services.n8n.settings.n8n.port}"; } ];
           }
         ];
       }