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

- name: Create Docker network for PostgreSQL
  docker_network:
    name: central_postgres
    state: present
    ipam_config:
      - subnet: "{{ networks.local.postgres.subnet }}"
  when: run_once_docker_postgres is not defined

- name: Install PostgreSQL
  docker_container:
    name: "{{ applications[application_id].hostname }}"
    image: "{{ applications | get_docker_image(application_id) }}"
    detach: yes
    env:
      POSTGRES_PASSWORD: "{{ applications[application_id].credentials.postgres_password }}"
      POSTGRES_INITDB_ARGS: "--encoding=UTF8 --locale=C" # Necessary for docker-matrix
    networks:
      - name: central_postgres
    published_ports:
      - "127.0.0.1:{{ applications[application_id].port }}:5432"
    volumes:
      - central_postgres_database:/var/lib/postgresql/data
    restart_policy: "{{ docker_restart_policy }}"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 30s
  register: setup_postgres_container_result
  when: run_once_docker_postgres is not defined

- name: Wait for Postgres inside the container
  shell: "docker exec {{ applications[application_id].hostname }} pg_isready -U postgres"
  register: pg_ready
  until: pg_ready.rc == 0
  retries: 30
  delay: 5
  when:
    - setup_postgres_container_result is defined
    - setup_postgres_container_result.changed
    - run_once_docker_postgres is not defined

- name: install python-psycopg2
  pacman: 
    name: python-psycopg2
    state: present
  when: run_once_docker_postgres is not defined

- name: Load database initialization tasks dynamically
  include_tasks: init_database.yml
  when:
    - database_username is defined
    - database_password is defined
    - database_name is defined

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