Simplify cloudflared tunnel configuration

desktop/ftl.host.nix

@@ -3,110 +3,76 @@
 let
   # Cloudflare tunnel definitions
   tunnels = {
-    # Define each tunnel with its configuration
     warp = {
-      name = "ftlhost-ssh";                   # Tunnel name (used for service name and config)
-      id = "";                                # Leave empty initially, you'll need to create and fill this
-      hostname = "warp.ftl.host";            # Cloudflare DNS hostname
-      service = "ssh://localhost:22";        # Local service to route traffic to
+      remoteHost = "warp.ftl.host";           # Cloudflare hostname
+      remoteTarget = "localhost:22";          # Where traffic routes to
+      localBindPort = 4401;                   # Local port exposed by cloudflared
+      logPath = "/var/log/cloudflared/warp.log";
     };
-    # Add more tunnels here as needed
   };
-  
-  # Function to generate config file content for each tunnel
-  tunnelConfigFor = name: tunnel: ''{
-  "tunnel": "${tunnel.id}",
-  "credentials-file": "/var/lib/cloudflared/${name}.json",
-  "logfile": "/var/lib/cloudflared/${name}.log",
-  "loglevel": "info",
-  "ingress": [
-    {
-      "hostname": "${tunnel.hostname}",
-      "service": "${tunnel.service}"
-    },
-    {"service": "http_status:404"}
-  ]
-}'';
-
 in {
   # Install cloudflared
   environment.systemPackages = with pkgs; [ cloudflared ];
-  
-  # Define cloudflared user and group
-  users.users.cloudflared = {
-    isSystemUser = true;
-    group = "cloudflared";
-    description = "Cloudflared service user";
-    home = "/var/lib/cloudflared";
-    createHome = true;
-  };
-  
-  users.groups.cloudflared = {};
-  
-  # Ensure /var/lib/cloudflared exists with proper permissions
+
+  # Ensure /var/log/cloudflared exists
   systemd.tmpfiles.rules = [
-    "d /var/lib/cloudflared 0755 cloudflared cloudflared -"
+    "d /var/log/cloudflared 0755 root root -"
   ];
 
-  # Create a systemd service for each tunnel
+  # Systemd services per tunnel
   systemd.services = lib.mapAttrs (name: tunnel: {
-    description = "Cloudflare Tunnel for ${tunnel.hostname}";
+    description = "Cloudflared Access TCP Tunnel for ${tunnel.remoteHost}";
     after = [ "network-online.target" ];
     wants = [ "network-online.target" ];
     wantedBy = [ "multi-user.target" ];
     
-    # Create config file before starting the service
-    preStart = ''  
-      # Create config file if it doesn't exist
-      if [ ! -f "/var/lib/cloudflared/${name}.yml" ]; then
-        echo '${tunnelConfigFor name tunnel}' > /var/lib/cloudflared/${name}.yml
-        chown cloudflared:cloudflared /var/lib/cloudflared/${name}.yml
-        chmod 600 /var/lib/cloudflared/${name}.yml
-      fi
-    '';
-    
-    # Service configuration
+    # Use StateDirectory for persistent storage of logs
     serviceConfig = {
+      StateDirectory = "cloudflared";
+      StateDirectoryMode = "0755";
+      RuntimeDirectory = "cloudflared";
+      RuntimeDirectoryMode = "0700";
+      
+      # The key setting to ensure the service stays running
       Type = "simple";
-      ExecStart = "${pkgs.cloudflared}/bin/cloudflared tunnel --config /var/lib/cloudflared/${name}.yml run";
+      ExecStart = "${pkgs.cloudflared}/bin/cloudflared access tcp --hostname ${tunnel.remoteHost} --url ${tunnel.remoteTarget} --port ${toString tunnel.localBindPort} --logfile /var/lib/cloudflared/warp.log";
       Restart = "always";
       RestartSec = "5s";
+      
+      # Use systemd's built-in user
       User = "cloudflared";
       Group = "cloudflared";
+      
+      # Standard outputs
       StandardOutput = "journal";
       StandardError = "journal";
-      
-      # Security hardening
-      ProtectSystem = "strict";
-      ProtectHome = "read-only";
-      PrivateTmp = true;
     };
+    
+    # Ensure the user exists
+    users.users.cloudflared = {
+      isSystemUser = true;
+      group = "cloudflared";
+      description = "Cloudflared service user";
+    };
+    
+    users.groups.cloudflared = {};
   }) tunnels;
 
-  # Documentation metadata
+  # Activation step to ensure log directory exists
+  system.activationScripts.cloudflaredLogs = lib.stringAfter [ "users" ] ''
+    mkdir -p /var/log/cloudflared
+    chmod 755 /var/log/cloudflared
+  '';
+
+  # Optional documentation metadata
   meta.doc = ''
-    This module defines persistent Cloudflare Tunnels using the tunnel command.
-    
-    Before using this module:
-    
-    1. Create a tunnel for each service with:
-       $ sudo -u cloudflared cloudflared tunnel create <name>
-       
-    2. Get the tunnel ID with:
-       $ sudo -u cloudflared cloudflared tunnel list
-       
-    3. Add the tunnel ID to the corresponding tunnel definition in this file
-    
-    4. Create a credentials file for each tunnel at /var/lib/cloudflared/<name>.json
-       This will be created automatically when you create the tunnel
-    
-    5. Configure DNS for your hostname to point to the tunnel with:
-       $ sudo -u cloudflared cloudflared tunnel route dns <tunnel-id> <hostname>
-    
-    Add more tunnels by adding entries to the tunnels attribute set with:
-    - name: Descriptive name for the tunnel
-    - id: The tunnel ID (from cloudflared tunnel create)
-    - hostname: The hostname to expose via Cloudflare
-    - service: The local service to route to (e.g., ssh://localhost:22)
+    This module defines persistent cloudflared TCP tunnels using access tcp.
+    Add tunnels by appending to the `tunnels` attribute set.
+
+    Required keys:
+    - remoteHost: The public hostname exposed via Cloudflare Tunnel.
+    - remoteTarget: The internal service to forward traffic to (e.g. localhost:22).
+    - localBindPort: The port to expose locally (e.g. 4401).
+    - logPath: File path to capture logs.
   '';
 }