infra-role-postgres-ha/tasks/users.yml

---
- name: 'Create user replication user'
  command: >
    docker exec {{ postgres_ha_cont_name }}
      psql
        --username={{ postgres_ha_admin_user }}
        --port={{ postgres_ha_cont_port }}
        --command
      "DO $$
       BEGIN
         CREATE ROLE {{ postgres_ha_replica_user }}
         WITH REPLICATION LOGIN ENCRYPTED PASSWORD '{{ postgres_ha_replica_pass }}';
         EXCEPTION WHEN DUPLICATE_OBJECT THEN
         RAISE NOTICE 'not creating role {{ postgres_ha_replica_user }} -- it already exists';
       END
      $$;"