app-server.yml

---
- hosts: app
  gather_facts: no
  remote_user: '{{ ssh_user }}'
  become: '{{ use_sudo }}'

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

    - name: add docker official repository
      apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/debian {{ debian_version }} stable
        state: present

    - name: install prerequisites
      notify: restart fail2ban
      apt:
        update_cache: yes
        state: latest
        pkg:
          - apt-transport-https
          - ca-certificates
          - curl
          - gnupg-agent
          - software-properties-common

    - name: install docker
      notify: restart docker
      apt:
        state: latest
        pkg:
          - docker-ce

    - name: ensure docker is enabled
      service: name=docker enabled=yes
      notify: restart docker

  handlers:
    - name: restart docker
      action: service name=docker state=restarted