diff --git a/roles/head-node/files/compute-node-vars.yml b/roles/head-node/files/compute-node-vars.yml
new file mode 100644
index 0000000..4991bbb
--- /dev/null
+++ b/roles/head-node/files/compute-node-vars.yml
@@ -0,0 +1 @@
+fabric_iface_spec: '{{ compute_node.fabric_iface_match }}'
diff --git a/roles/head-node/files/compute-node.yml b/roles/head-node/files/compute-node.yml
index 7fb41f0..94aac38 100644
--- a/roles/head-node/files/compute-node.yml
+++ b/roles/head-node/files/compute-node.yml
@@ -1,4 +1,12 @@
-- hosts: all
+---
+- name: Include vars
+  hosts: all
+  tasks:
+  - include_vars: vars/compute-node.yml
+
+- name: Configure compute hosts to use DNS server
+  hosts: all
   remote_user: ubuntu
+  become: yes
   roles:
-    - compute-node
+    - role: compute-node