quoting vars

playbooks/edx-east/edx_provision.yml

@@ -4,13 +4,13 @@
   gather_facts: False
   roles:
     - role: launch_instance
-      keypair: {{ keypair }}
-      instance_type: {{ instance_type }}
-      security_group: {{ security_group }}
-      ami_image: {{ ami }}
-      region: {{ region }}
-      instance_tags: {{ instance_tags }}
-      size: {{ size }}
+      keypair: "{{ keypair }}"
+      instance_type: "{{ instance_type }}"
+      security_group: "{{ security_group }}"
+      ami_image: "{{ ami }}"
+      region: "{{ region }}"
+      instance_tags: "{{ instance_tags }}"
+      size: "{{ size }}"
 
 
 - name: Configure instance(s)