install_docker.yml

# This script is a slight modification of the one showed at DigitalOcena tutorial: 
# REFERENCE: https://www.digitalocean.com/community/tutorials/how-to-use-ansible-to-install-and-set-up-docker-on-ubuntu-18-04#the-playbook-contents

# Tasks block for installing Docker
- name: Install Docker
  block:
    # Task for installingg packages required by Docker
    - name: Install Docker required packages
      apt: name={{ item }} state=latest update_cache=yes
      loop: [ 'apt-transport-https', 'ca-certificates', 'curl', 'software-properties-common', 'python3-pip']

    # Docker module for python needed for Ansible
    - name: Install Docker Module for Python
      pip:
        name: docker

    # Add Docker GPG Key 
    - name: Add Docker GPG apt Key
      apt_key:
        url: https://download.docker.com/linux/ubuntu/gpg
        state: present

    # Add Docker repository
    - name: Add Docker Repository
      apt_repository:
        repo: deb https://download.docker.com/linux/ubuntu bionic stable
        state: present

    # Finally, install docker-ce
    - name: Update apt and install docker-ce
      apt: update_cache=yes name=docker-ce state=latest