add names for public interfaces, add apt-cacher-ng role
diff --git a/vars/cord.yml b/vars/cord.yml
index 8474e00..24710ef 100644
--- a/vars/cord.yml
+++ b/vars/cord.yml
@@ -23,6 +23,12 @@
     ns:
       - { name: ns1 }
     nodelist: head_vm_list
+    aliases:
+      - { name: "ns1" , dest: "head" }
+      - { name: "ns" , dest: "head" }
+      - { name: "apt-cache" , dest: "head" }
+
+name_on_public_interface: head
 
 # If true, unbound listens on the head node's `ansible_default_ipv4` interface
 unbound_listen_on_default: True