Initial commit

modules/nixos/tailscale/default.nix

@@ -0,0 +1,50 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.services.tailscale;
+
+  inherit (lib)
+    mkIf
+    mkOption
+    optional
+    types
+    ;
+in
+{
+  options.services.tailscale = {
+    loginServer = mkOption {
+      type = types.str;
+      description = "The Tailscale login server to use.";
+    };
+    enableSSH = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Enable Tailscale SSH functionality.";
+    };
+    acceptDNS = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Enable Tailscale's MagicDNS and custom DNS configuration.";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.tailscale = {
+      authKeyFile = config.sops.secrets."tailscale/auth-key".path;
+      extraSetFlags = optional cfg.enableSSH "--ssh" ++ optional cfg.acceptDNS "--accept-dns";
+      extraUpFlags = [
+        "--login-server=${cfg.loginServer}"
+      ]
+      ++ optional cfg.enableSSH "--ssh"
+      ++ optional cfg.acceptDNS "--accept-dns";
+    };
+
+    environment.shellAliases = {
+      ts = "${cfg.package}/bin/tailscale";
+    };
+
+    networking.firewall.trustedInterfaces = [ cfg.interfaceName ];
+
+    sops.secrets."tailscale/auth-key" = { };
+  };
+}