tasks/postgres.yml

---
- name: Obtain pgmaster IP for DC 2, if not provided
  set_fact:
    dp_pg_ip: "{{ hostvars[groups['dp-db'][0]][interface_name].ipv4.address }}"

- name: Set pgmaster_ip for DC 2, in cache, if defined
  cache:
    key: dp_pg_ip
    value: '{{ dp_pg_ip }}'
  when: dp_pg_ip is defined