ansible-install-docker.yml

---
- hosts: manage
  remote_user: root
  tasks:
    - name: install dependencies
      apt:
        package:
          - apt-transport-https
          - ca-certificates
          - curl
          - gnupg-agent
          - software-properties-common
        state: present

    - name: install key
      apt_key:
        url: https://download.docker.com/linux/debian/gpg
        state: present

    - name: repository
      apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/debian stretch stable
        state: present

    - name: install docker
      apt:
        package:
          - docker-ce
          - docker-ce-cli
          - containerd.io
        state: present
        update_cache: true