Basic Postgresql Installtion as a Single Node

 Basic Postgresql Installtion as a Single Node:

---
- name: Install postgres
  hosts: localhost
  become: true
  tasks:
    - name: Install postgres
      yum:
        name:
          - postgresql
          - postgresql-server
          - postgresql-contrib
          - postgresql-libs
          - python3-psycopg2
        state: present

    - name: Postgresql initialized or not
      stat:
        path: /var/lib/pgsql/data/pg_hba.conf
      register: result

    - name: InitDB
      shell: postgresql-setup initdb
      when: not result.stat.exists


    - name: Open port for postgresql
      firewalld:
        service: postgresql
        permanent: true
        state: enabled
      notify:
        - Reload firewalld

    - name : Start service
      service: postgresql
      state: started
      enabled: true

  handlers:
    - name: Reload firewalld
      service: firewalld
      state: reloaded