get instance id

playbooks/edx-east/edx_provision.yml

@@ -33,12 +33,19 @@
     # in as a -e variable
     - gh_users
   post_tasks:
+    - name: get instance id for elb registration
+      local_action:
+        module: ec2_lookup
+        region: us-east-1
+        tags:
+          Name: "{{ name_tag }}"
+      register: ec2_info
+      when: elb
     - name: register instance into an elb if one was provided
       local_action:
         module: ec2_elb
         region: "{{ region }}"
-        instance_id: "{{ item }}"
+        instance_id: "{{ ec2_info.instance_ids[0] }}"
         ec2_elbs:
           - "{{ elb }}"
-      with_items: "{{ ec2.instances }}"
       when: elb