---
# https://medium.com/@GarisSpace/how-to-install-docker-using-ansible-01a674086f8c
- name: Setting host facts
  ansible.builtin.set_fact:
    arch_mapping: # Map ansible architecture {{ ansible_architecture }} names to Docker's architecture names
      x86_64: amd64
      aarch64: arm64
  tags:
    - always

- name: Install required packages
  tags:
    - install
  ansible.builtin.apt:
    pkg:
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg
      - software-properties-common

- name: Create directory for Docker's GPG key
  tags:
    - install
  ansible.builtin.file:
    path: /etc/apt/keyrings
    state: directory
    mode: "0755"

- name: Add Docker's official GPG key
  tags:
    - install
  ansible.builtin.apt_key:
    url: https://download.docker.com/linux/ubuntu/gpg
    keyring: /etc/apt/keyrings/docker.gpg
    state: present

- name: Print architecture variables
  tags:
    - install
  ansible.builtin.debug:
    msg: "Architecture: {{ ansible_architecture }}, Codename: {{ ansible_lsb.codename }}"

- name: Add Docker repository
  tags:
    - install
  ansible.builtin.apt_repository:
    repo: >-
      deb [arch={{ arch_mapping[ansible_architecture] | default(ansible_architecture) }}
      signed-by=/etc/apt/keyrings/docker.gpg]
      https://download.docker.com/linux/ubuntu {{ ansible_lsb.codename }} stable
    filename: docker
    state: present

- name: Install Docker and related packages
  tags:
    - install
  ansible.builtin.apt:
    name:
      - docker-ce
      - docker-ce-cli
      - containerd.io
      - docker-buildx-plugin
      - docker-compose-plugin
    state: present
    update_cache: true

- name: Add Docker group
  tags:
    - install
  ansible.builtin.group:
    name: docker
    state: present

- name: Add user to Docker group
  tags:
    - install
  ansible.builtin.user:
    name: "{{ username }}"
    groups: docker
    append: true

- name: Enable and start Docker services
  tags:
    - install
  ansible.builtin.systemd:
    name: "{{ item }}"
    enabled: true
    state: started
  loop:
    - docker.service
    - containerd.service