---
- name: Install Docker and add user to docker group
  hosts: all
  become: true
  tasks:
    - name: Update apt package index and install dependencies
      ansible.builtin.apt:
        name:
          - ca-certificates
          - curl
          - gnupg
        update_cache: yes
        state: present

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

    - name: Download and de-armor Docker's official GPG key
      ansible.builtin.shell:
        cmd: curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
        creates: /etc/apt/keyrings/docker.gpg

    - name: Ensure Docker GPG key has correct permissions
      ansible.builtin.file:
        path: /etc/apt/keyrings/docker.gpg
        mode: '0644'

    - name: Set up Docker's official repository
      ansible.builtin.shell:
        cmd: 'echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null'
        creates: /etc/apt/sources.list.d/docker.list

    - name: Update apt package index after adding repo
      ansible.builtin.apt:
        update_cache: yes

    - name: Install Docker Engine and plugins
      ansible.builtin.apt:
        name:
          - docker-ce
          - docker-ce-cli
          - containerd.io
          - docker-buildx-plugin
          - docker-compose-plugin
        state: present

    - name: Create docker group
      ansible.builtin.group:
        name: docker
        state: present

    - name: Add user 'linuxadmin' to docker group
      ansible.builtin.user:
        name: linuxadmin
        groups: docker
        append: yes
# replace linuxadmin with the user you want to add to the Docker group.