making dns zone configurable

playbooks/edx-east/edx_provision.yml

@@ -12,6 +12,7 @@
       instance_tags: "{{ instance_tags }}"
       size: "{{ size }}"
       dns_name: "{{ dns_name }}"
+      dns_zone: "{{ dns_zone }}"
 
 - name: Configure instance(s)
   hosts: launched

playbooks/roles/launch_ec2/tasks/main.yml

@@ -40,7 +40,7 @@
   local_action:
     module: route53
     command: create
-    zone: sandbox.edx.org
+    zone: "{{ dns_zone }}"
     type: CNAME
     ttl: 300
     record: "preview.{{ dns_name }}"