Add nfs exports for backup

hosts/voyager/configuration.nix

@@ -7,6 +7,7 @@
       ../../common/metrics-exporters.nix
       ./hardware-configuration.nix
       ./filesystems.nix
+      ./exports.nix
       #./vms.nix
 
       ./services/nginx

hosts/voyager/exports.nix

@@ -0,0 +1,20 @@
+{ config, pkgs, lib, ... }:
+{
+  fileSystems = {
+    "/export/riker-backup" = {
+      device = "/tank/backup/riker";
+      options = [ "bind" ];
+    };
+  };
+
+  # Enable nfs4 only
+  services.nfs.server = {
+    enable = true;
+    exports = ''
+      /export                   192.168.10.4(rw,fsid=0,no_subtree_check)
+      /export/riker-backup      192.168.10.4(rw,nohide,no_subtree_check,no_root_squash)
+    '';
+  };
+
+  networking.firewall.allowedTCPPorts = [ 2049 ];
+}