computer-playbook/roles/docker-postgres/tasks/main.yml

- name: Create Docker network for PostgreSQL
  docker_network:
    name: postgres_network
    state: present
  when: run_once_docker_postgres is not defined

- name: Install PostgreSQL
  docker_container:
    name: postgres
    image: postgres:latest
    detach: yes
    env:
      POSTGRES_PASSWORD: "{{ central_postgres_password }}"
      POSTGRES_INITDB_ARGS: "--encoding=UTF8 --locale=C" # Necessary for docker-matrix
    networks:
      - name: postgres_network
    published_ports:
      - "127.0.0.1:5432:5432"
  when: run_once_docker_postgres is not defined

- name: wait for availability of postgres
  wait_for:
    host: "127.0.0.1"
    port: "5432"
    delay: 0      
    timeout: 120
  when: run_once_docker_postgres is not defined  

- name: Create database
  postgresql_db:
    name: "{{ database_databasename }}"
    state: present
    login_user: postgres
    login_password: "{{ central_postgres_password }}"
    login_host: 127.0.0.1
    login_port: 5432
  listen: create database

- name: Create database user
  postgresql_user:
    name: "{{ database_username }}"
    password: "{{ database_password }}"
    db: "{{ database_databasename }}"
    priv: ALL
    state: present
    login_user: postgres
    login_password: "{{ central_postgres_password }}"
    login_host: 127.0.0.1
    login_port: 5432
  listen: create database

- name: Run the docker_postgres tasks once
  set_fact:
    run_once_docker_postgres: true
  when: run_once_docker_postgres is not defined