add restore from backup support

tasks/RedHat/data_dir.yaml

@@ -0,0 +1,19 @@
+- name: Create data directory
+  file:
+    path: "{{ postgresql_data_dir }}"
+    owner: "postgres"
+    group: "postgres"
+    state: directory
+
+- name: Create override directory for systemd unit
+  file:
+    path: "{{ postgresql_system_override_dir }}"
+    state: directory
+
+- name: Create override for data directory
+  copy:
+    dest: "{{ postgresql_system_override_dir }}/override.conf"
+    content: |
+      [Service]
+      Environment=PGDATA={{ postgresql_data_dir }}
+  notify: Restart PostgreSQL