Install the CORD-in-a-Box head node into the 'prod' VM

Change-Id: I121130e21ae4268a9dbc9d0a6fb8ff8095ffdcc7
diff --git a/ansible/roles/extra-drive/defaults/main.yml b/ansible/roles/extra-drive/defaults/main.yml
new file mode 100644
index 0000000..1d16dac
--- /dev/null
+++ b/ansible/roles/extra-drive/defaults/main.yml
@@ -0,0 +1,6 @@
+extra_disk_dev: /dev/vda
+
+extra_disk_links:
+ - { src: /mnt/lxd, dest: /var/lib/lxd }
+ - { src: /mnt/docker-registry, dest: /docker-registry }
+ - { src: /mnt/lxcfs, dest: /var/lib/lxcfs }