finish install process

defaults/main.yml

@@ -2,4 +2,5 @@
 postgres_repository_enabled: False
 postgres_version: 10
 postgres_repository_filename: "Postgresql-{{ postgres_version | regex_replace('\\.') }}"
-postgres_packagename: postgresql
+postgres_user: postgres
+postgres_group: postgres

handlers/main.yml

@@ -0,0 +1,10 @@
+---
+- name: Restart service
+  service:
+    name: "{{ __postgres_daemon }}"
+    state: restarted
+    enabled: yes
+    daemon_reload: yes
+  listen: __postgres_restart
+  become: True
+  become_user: root

tasks/install.yml

@@ -4,8 +4,21 @@
     package:
       name: "{{ item }}"
       state: present
-    with_items:
-      - "{{ postgres_packagename }}"
-      - "{{ postgres_packagename }}-server"
+    with_items: "{{ __postgres_packages }}"
+
+  - name: Ensure data directory exists
+    file:
+      path: "{{ __postgres_data_dir }}"
+      owner: "{{ postgres_user }}"
+      group: "{{ postgres_group }}"
+      state: directory
+      mode: 0700
+
+  - name: Setup custom systemd unit
+    template:
+      src: etc/systemd/system/postgresql.service.j2
+      dest: "etc/systemd/system/{{ __postgres_daemon }}.service"
+      mode: 0644
+    notify: __postgres_restart
   become: True
   become_user: root

tasks/main.yml

@@ -1,3 +1,4 @@
 ---
 - import_tasks: prepare.yml
 - import_tasks: install.yml
+- import_tasks: post_tasks.yml

tasks/post_tasks.yml

@@ -0,0 +1,19 @@
+---
+- name: Ensure PostgreSQL is up and running
+  service:
+    name: "{{ postgresql-10 }}"
+    state: started
+    enabled: yes
+  become: True
+  become_user: root
+
+- name: Check if database is initialized
+  stat:
+    path: "{{ postgresql_data_dir }}/PG_VERSION"
+  register: pgdata_dir_version
+
+- name: Ensure database is initialized
+  command: "/usr/pgsql-{{ __postgres_version }}/bin/postgresql-{{ __postgres_version }}-setup initdb"
+  when: not pgdata_dir_version.stat.exists
+  become: true
+  become_user: "{{ postgres_user }}"

tasks/prepare.yml

@@ -1,20 +1,16 @@
 ---
-- block:
-  - name: Add PostgreSQL repository
-    yum_repository:
-      name: postgresql
-      file: "{{ postgres_repository_filename }}"
-      description: PostgreSQL yum repository
-      baseurl: "https://download.postgresql.org/pub/repos/yum/{{ postgres_version }}/redhat/rhel-{{ ansible_distribution_major_version }}-{{ ansible_architecture }}"
-      gpgcheck: yes
-      enabled: yes
-      gpgkey: "https://download.postgresql.org/pub/repos/yum/RPM-GPG-KEY-PGDG-{{ postgres_version }}"
+- name: Load helper variables
+  include_vars: "main.yml"
 
-  - set_fact:
-      postgres_packagename: "postgresql{{ postgres_version | regex_replace('\\.') }}"
-
-  - debug:
-      msg: "Set PostgreSQL package name to '{{ postgres_packagename }}'"
-  become: True
-  become_user: root
-  when: postgres_repository_enabled
+- name: Add PostgreSQL repository
+  yum_repository:
+    name: postgresql
+    file: "{{ postgres_repository_filename }}"
+    description: PostgreSQL yum repository
+    baseurl: "https://download.postgresql.org/pub/repos/yum/{{ __postgres_version }}/redhat/rhel-{{ ansible_distribution_major_version }}-{{ ansible_architecture }}"
+    gpgcheck: yes
+    enabled: yes
+    gpgkey: "https://download.postgresql.org/pub/repos/yum/RPM-GPG-KEY-PGDG-{{ __postgres_version }}"
+become: True
+become_user: root
+when: postgres_repository_enabled

templates/etc/systemd/system/postgresql.service.j2

@@ -0,0 +1,4 @@
+## {{ ansible_managed }}
+.include {{ __postgres_service_file }}
+[Service]
+Environment=PGDATA={{ __postgres_data_dir }}

vars/main.yml

@@ -0,0 +1,10 @@
+---
+__postgres_version: "{{ postgres_version | regex_replace('\\.') }}"
+__postgres_packagename: "postgresql{{ __postgres_version }}"
+__postgres_daemon: "postgresql-{{ __postgres_version }}"
+__postgres_service_file: "/usr/lib/systemd/system/{{ __postgres_daemon }}.service"
+__postgres_packages:
+  - "{{ __postgres_packagename }}"
+  - "{{ __postgres_packagename }}-server"
+__postgres_data_dir: "/var/lib/pgsql/{{ __postgres_version }}/data"
+__postgres_config_path: "/var/lib/pgsql/data"