okd/roles/openshift_aws/tasks/master_facts.yml

---
- name: fetch elbs
  ec2_elb_facts:
    region: "{{ openshift_aws_region }}"
    names:
    - "{{ item }}"
  with_items:
  - "{{ openshift_aws_elb_name }}-external"
  - "{{ openshift_aws_elb_name }}-internal"
  delegate_to: localhost
  register: elbs

- debug: var=elbs

- name: set fact
  set_fact:
    openshift_master_cluster_hostname: "{{ elbs.results[1].elbs[0].dns_name }}"
    osm_custom_cors_origins:
    - "{{ elbs.results[1].elbs[0].dns_name }}"
    - "console.{{ openshift_aws_clusterid | default('default') }}.openshift.com"
    - "api.{{ openshift_aws_clusterid | default('default') }}.openshift.com"
  with_items: "{{ groups['masters'] }}"