feat(postgresql): add ansible role for postgresql deployment

roles/postgresql/README.md

@@ -2,3 +2,8 @@
 
 PostgreSQL is the self proclaimed "world's most advanced" open source relational
 database. This ansible role can deploy and configure postgresql.
+
+## Requirements
+
+- `psycopg2` (pip) package
+- `docker` (pip) package

roles/postgresql/tasks/deploy-docker.yml

@@ -38,12 +38,13 @@
   when:
     - ansible_facts['service_mgr'] == 'systemd'
     - postgresql_state == 'present'
+  register: postgresql_systemd_tmpfile_correction_unit_info
 
 - name: Ensure systemd is reloaded
   ansible.builtin.systemd:
     daemon_reload: true
   when:
-    - postgresql_systemd_tmpfile_correction_unit.changed
+    - postgresql_systemd_tmpfile_correction_unit_info.changed
 
 - name: Ensure systemd unit {{ postgresql_systemd_tmpfile_socket_correction_unit_name }} is {{ postgresql_container_state }}
   ansible.builtin.systemd:
@@ -57,11 +58,20 @@
     enabled: "{{ postgresql_state == 'present' }}"
   when: ansible_facts['service_mgr'] == 'systemd'
 
+- name: Lookup {{ postgresql_data_path }}/global
+  ansible.builtin.stat:
+    path: "{{ postgresql_data_path }}/global"
+    get_checksum: false
+  register: postgresql_global_data_info
+
 - name: Initialize database if empty
   ansible.builtin.include_tasks:
     file: "initialize-docker.yml"
   when:
     - postgresql_state == 'present'
+    - postgresql_global_data_info.stat.exists
+    - postgresql_global_data_info.stat.isdir is defined
+    - postgresql_global_data_info.stat.isdir
     # TODO: determine if initialization is needed
 
 - name: Ensure postgresql container '{{ postgresql_container_name }}' is {{ postgresql_container_state }}

roles/postgresql/tasks/initialize-docker.yml

@@ -27,7 +27,7 @@
   block:
     - name: Wait for container startup (socket)
       ansible.builtin.wait_for:
-        path: "{{ postgresql_config_unix_socket_directories | first  }}.s.PGSQL.{{ postgresql_config_port }}"
+        path: "{{ postgresql_config_unix_socket_directories | first  }}/.s.PGSQL.{{ postgresql_config_port }}"
       when: "postgresql_config_connect_socket | bool"
     - name: Wait for container startup (port)
       ansible.builtin.wait_for:
@@ -45,4 +45,3 @@
   community.docker.docker_container:
     name: "{{ postgresql_container_name }}"
     state: absent
-