Issue #1403: Don't override defaults on old CentOS 6 install.

tasks/configure.yml

@@ -8,7 +8,7 @@
   with_items: "{{ postgresql_global_config_options }}"
   notify: restart postgresql
 
-- name: Configure host based authentication.
+- name: Configure host based authentication (if entries are configured).
   template:
     src: "templates/pg_hba.conf.j2"
     dest: "{{ postgresql_config_path }}/pg_hba.conf"
@@ -16,6 +16,7 @@
     group: "{{ postgresql_group }}"
     mode: 0600
   notify: restart postgresql
+  when: postgresql_hba_entries
 
 - name: Ensure PostgreSQL unix socket dirs exist.
   file:

tests/test.yml

@@ -12,8 +12,9 @@
       apt: update_cache=yes cache_valid_time=600
       when: ansible_os_family == 'Debian'
 
-    - name: Set custom variable name for old CentOS 6 PostgreSQL install.
+    - name: Set custom variables for old CentOS 6 PostgreSQL install.
       set_fact:
+        postgresql_hba_entries: []
         postgresql_global_config_options:
           - option: unix_socket_directory
             value: '{{ postgresql_unix_socket_directories[0] }}'