feat: init

modules/tailscale.nix

@@ -0,0 +1,26 @@
+{ config, pkgs, ... }:
+{
+  age.secrets.tailscale-auth = {
+    file = ../secrets/tailscale-auth.age;
+    owner = "root";
+  };
+
+  services.tailscale.enable = true;
+
+  systemd.services.tailscale-autoconnect = {
+    description = "Automatic connection to Tailscale";
+    after = [ "network-pre.target" "tailscale.service" ];
+    wants = [ "network-pre.target" "tailscale.service" ];
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig.Type = "oneshot";
+    script = ''
+      sleep 2
+      status="$(${pkgs.tailscale}/bin/tailscale status -json | ${pkgs.jq}/bin/jq -r .BackendState)"
+      if [ "$status" = "Running" ]; then exit 0; fi
+      ${pkgs.tailscale}/bin/tailscale up --authkey file:${config.age.secrets.tailscale-auth.path}
+    '';
+  };
+
+  networking.firewall.trustedInterfaces = [ "tailscale0" ];
+  networking.firewall.allowedUDPPorts = [ 41641 ];
+}