add Linode settings to modules

2 files changed, 39 insertions, 0 deletions

diff --git a/module-list.nix b/module-list.nix
index 3bb9ee3..9981930 100644
--- a/module-list.nix
+++ b/module-list.nix
@@ -1,4 +1,5 @@
 [
   ./modules/keyboard.nix
+  ./modules/linode.nix
   ./modules/yubikey.nix
 ]
diff --git a/modules/linode.nix b/modules/linode.nix
new file mode 100644
index 0000000..d70c929
--- /dev/null
+++ b/modules/linode.nix
@@ -0,0 +1,38 @@
+{ config, pkgs, lib, ... }:
+with lib;
+
+# from https://www.linode.com/docs/tools-reference/custom-kernels-distros/install-nixos-on-linode/.
+
+let 
+  cfg = config.eth.linode;
+
+in {
+
+  options.eth.linode = {
+    enable = mkEnableOption "good defaults for Linodes";
+  };
+
+  config = mkIf cfg.enable {
+
+    # Enable LISH serial console.
+    boot.kernelParams = [ "console=ttyS0,19200n8" ];
+    boot.loader.grub.extraConfig = ''
+      serial --speed=19200 --unit=0 --word=8 --parity=no --stop=1;
+      terminal_input serial;
+      terminal_output serial;
+    '';
+
+    # GRUB has issues with Linode,
+    # so this ignores the warnings.
+    boot.loader.grub.forceInstall = true;
+  
+    # A long timeout to cope with LISH delays.
+    boot.loader.timeout = 10;
+  
+    boot.loader.grub = {
+      enable = true;
+      version = 2;
+      device = "nodev";  # "nodev" for EFI.
+    };
+  };
+}