New modules for container managment

modules/virtualisation/lxc-guest.nix

@@ -0,0 +1,27 @@
+{ config, lib, ... }:
+let
+  cfg = config.lxcGuest;
+in
+{
+  options.lxcGuest = {
+    enable = lib.mkEnableOption "NixOs inside LXC container";
+  };
+
+  config = lib.mkIf cfg.enable {
+    # start tty0 on serial console
+    systemd.services."getty@tty1" = {
+      enable = lib.mkForce true;
+      wantedBy = [ "getty.target" ]; # to start at boot
+      serviceConfig.Restart = "always"; # restart when session is closed
+    };
+
+    # Supress systemd units that don't work because of LXC.
+    # https://blog.xirion.net/posts/nixos-proxmox-lxc/#configurationnix-tweak
+    systemd.suppressedSystemUnits = [
+      "dev-mqueue.mount"
+      "sys-kernel-debug.mount"
+      "sys-fs-fuse-connections.mount"
+    ];
+  };
+
+}