Use the the original PostgreSQL configuration file

defaults/main.yml

@@ -53,6 +53,7 @@ postgresql_dist_redhat:
       (postgresql_package_version | length > 0) |
       ternary('-' + postgresql_package_version, '')
     }}
+  conf_sample_file: "/usr/pgsql-{{ postgresql_version }}/share/postgresql.conf.sample"
 
 # Attributes are parsed and used to set facts at tasks/debian.yml.
 # Debian variation, following the same principles of postgresql_dist_redhat
@@ -62,4 +63,17 @@ postgresql_dist_debian:
   conf_postgresql_src: postgresql-conf.j2
   datadir: /var/lib/postgresql/{{ postgresql_version }}/main
   basename: postgresql-{{ postgresql_version }}
+  conf_sample_file: "/usr/share/postgresql/{{ postgresql_version }}/postgresql.conf.sample"
   service: postgresql
+
+# conf_sample_file: sample configuration file, it should be copied during the installation by the installation package
+
+# the following two variables are used to download link ofr the source to get the sample configuration file
+# It will be used in case of the sample file is not find locally for any reason
+versions_source_download:
+  13: "13.15"
+  14: "14.12"
+  15: "15.7"
+  16: "16.3"
+
+source_download_linnk: "https://ftp.postgresql.org/pub/source/v{{ versions_source_download [postgresql_version] }}/postgresql-{{ versions_source_download [postgresql_version] }}.tar.gz"

molecule/resources/tests/test_default.py

@@ -51,9 +51,9 @@ def test_server_listen(host):
 def test_backup_config_exist(host):
     version = get_version(host)
     if host.system_info.distribution == 'rocky':
-        config_backup = '/var/lib/pgsql/{version}/data/postgresql.conf.backup'
+        config_backup = '/var/lib/pgsql/{version}/data/postgresql.conf.org'
     else:
-        config_backup = '/etc/postgresql/{version}/main/postgresql.conf.backup'
+        config_backup = '/etc/postgresql/{version}/main/postgresql.conf.org'
     with host.sudo():
         backup_file = config_backup.format(version=version)
         assert host.file(backup_file).is_file

tasks/initialise.yml

@@ -1,5 +1,6 @@
 ---
 # tasks file for ome.postgresql
+##Ansible managed
 
 - block:
     - name: postgres | set permissions on data directory
@@ -25,17 +26,16 @@
     - name: postgres | Check for presence of "Modified by ome postgresql ansible role" in file
       ansible.builtin.lineinfile:
         path: "{{ postgresql_dist_confdir }}/postgresql.conf"
-        line: "#Modified by ome postgresql ansible role"
+        line: "#Ansible managed"
         state: absent
       check_mode: yes
       changed_when: false
       register: config_file_changed
 
     - name: postgres | Check that the postgresql.conf.backup file exists
       ansible.builtin.stat:
-        path: "{{ postgresql_dist_confdir }}/postgresql.conf.backup"
-      register: backup_result
-
+        path: "{{ postgresql_dist_confdir }}/postgresql.conf.org"
+      register: org_file
 
     # read the default postgresql configuration file
     - name: postgres | get the postgres conf file contents
@@ -44,34 +44,70 @@
         src: "{{ postgresql_dist_confdir }}/postgresql.conf"
       register: postgres_config_file_contents_o
       when:
-        - not backup_result.stat.exists
+        - not org_file.stat.exists
+
+    - name: Print the org_file.stat.exists
+      ansible.builtin.debug:
+       msg:
+       - System 1 {{ org_file.stat.exists }} and {{ config_file_changed.found }}
+       - "{{ postgresql_dist_confdir }}/postgresql.conf.org"
+       - "{{ postgresql_dist_redhat.conf_sample_file }}"
+
+    - name: postgres | get the orginal configuration file
+      become_user: "{{ postgresql_become_user }}"
+      import_tasks: org_config_file.yml
+      when:
+        - not org_file.stat.exists
+        - config_file_changed.found
+
+    - name: postgres | get the orginal configuration file
+      become_user: "{{ postgresql_become_user }}"
+      ansible.builtin.slurp:
+        src: "{{ postgresql_dist_confdir }}/postgresql.conf.org"
+      register: postgres_config_file_contents_c
+      when:
+        - not org_file.stat.exists
+        - config_file_changed.found
+
 
     # read the default postgresql configuration file
-    - name: postgres | get the postgres conf file contents from backup
+    - name: postgres | get the postgres conf file contents from org
       become_user: "{{ postgresql_become_user }}"
       ansible.builtin.slurp:
-        src: "{{ postgresql_dist_confdir }}/postgresql.conf.backup"
+        src: "{{ postgresql_dist_confdir }}/postgresql.conf.org"
       register: postgres_config_file_contents_b
-      when: backup_result.stat.exists
+      when: org_file.stat.exists
+
 
     - set_fact: postgres_config_file_contents={{ postgres_config_file_contents_o }}
       when:
-        - not backup_result.stat.exists
+        - not org_file.stat.exists
 
     - set_fact: postgres_config_file_contents={{ postgres_config_file_contents_b }}
       when:
-        - backup_result.stat.exists
+        - org_file.stat.exists
 
-    - name: postgres | Copy a postgresql.conf to postgresql.conf.backup
+    - set_fact: postgres_config_file_contents={{ postgres_config_file_contents_c }}
+      when:
+        - not org_file.stat.exists
+        - config_file_changed.found
+
+    - name: postgres | Copy a postgresql.conf to postgresql.conf.org
       become_user: "{{ postgresql_become_user }}"
       ansible.builtin.copy:
         src: "{{ postgresql_dist_confdir }}/postgresql.conf"
-        dest: "{{ postgresql_dist_confdir }}/postgresql.conf.backup"
+        dest: "{{ postgresql_dist_confdir }}/postgresql.conf.org"
         remote_src: yes
       when:
-        - not backup_result.stat.exists
+        - not org_file.stat.exists
         - config_file_changed.found | default(0) == 0
 
+    - name: Print the org_file.stat.exists
+      ansible.builtin.debug:
+        msg: System {{ org_file.stat.exists }} and {{ config_file_changed.found }}
+      # when:
+      #  -  (not org_file.stat.exists and config_file_changed.found) or  config_file_changed.found or org_file.stat.exists
+
     - name: postgres | copy postgresql config file
       become_user: "{{ postgresql_become_user }}"
       ansible.builtin.template:
@@ -82,8 +118,9 @@
         owner: "{{ postgresql_become_user }}"
       notify:
         - restart postgresql
-      when:
-        - config_file_changed.found | default(0) == 0 or backup_result.stat.exists
+      when: (not org_file.stat.exists and config_file_changed.found) or  not config_file_changed.found or org_file.stat.exists
+        # -  not org_file.stat.exists
+        # - config_file_changed.found
 
     - name: postgres | configure client authorisation
       become_user: "{{ postgresql_become_user }}"

tasks/org_config_file.yml

@@ -0,0 +1,45 @@
+---
+# get the original configuration file
+
+- name: postgres | Check that the postgresql.conf.sample file exists (ubuntu)
+  ansible.builtin.stat:
+    path: "{{ postgresql_dist_debian.conf_sample_file }}"
+  register: conf_sample_file
+  when: ansible_os_family | lower == 'debian'
+
+- name: postgres | postgres | Check that the postgresql.conf.sample file exists (redhat)
+  ansible.builtin.stat:
+    path: "{{ postgresql_dist_redhat.conf_sample_file }}"
+  register: conf_sample_file
+  when: ansible_os_family | lower == 'redhat'
+
+- name: postgres | copy the sample file to org
+  become_user: "{{ postgresql_become_user }}"
+  ansible.builtin.copy:
+    src: "{{ postgresql_dist_redhat.conf_sample_file }}"
+    dest: "{{ postgresql_dist_confdir }}/postgresql.conf.org"
+  when:
+    -  conf_sample_file.stat.exists
+
+- name: postgres | download the source code
+  ansible.builtin.get_url:
+    url: "{{ source_download_linnk }}"
+    dest: /tmp/postgresql.tar.gz
+  when:
+    - not conf_sample_file.stat.exists
+
+- name: postgres | extract the files
+  ansible.builtin.unarchive:
+    src: /tmp/postgresql.tar.gz
+    dest: /tmp
+    remote_src: yes
+  when:
+    - not conf_sample_file.stat.exists
+
+- name: postgres |  copy the file to org file
+  become_user: "{{ postgresql_become_user }}"
+  ansible.builtin.copy:
+    src: "/tmp/postgresql-{{ versions_source_download [postgresql_version] }}/src/backend/utils/misc/postgresql.conf.sample"
+    dest: "{{ postgresql_dist_confdir }}/postgresql.conf.org"
+  when:
+    - not conf_sample_file.stat.exists

templates/postgresql-conf.j2

@@ -1,4 +1,4 @@
-#Modified by ome postgresql ansible role
+#{{ ansible_managed }}
 {{ postgres_config_file_contents['content'] | b64decode | regex_replace('}$', '')  }}
 
 listen_addresses = {{ postgresql_server_listen }}