---
# Configure Docker
# See also: https://docs.docker.com/engine/installation/linux/ubuntulinux/#install

- name: ensure docker group is present (or create it)
  group:
    name: docker
    state: present

- name: add user to docker group (avoids sudo-ing)
  user:
    name: "{{ ansible_user }}"
    group: docker
    state: present

- name: ensure docker's systemd directory exists
  file:
    path: /etc/systemd/system/docker.service.d
    state: directory
    recurse: yes
  when: ansible_os_family != "RedHat"

- name: enable docker remote api over tcp
  copy:
    src: "{{ role_path }}/files/docker.conf"
    dest: /etc/systemd/system/docker.service.d/docker.conf
  register: docker_conf
  when: ansible_os_family != "RedHat"

- name: restart docker service
  systemd:
    name: docker
    state: restarted
    daemon_reload: yes  # ensure docker.conf is picked up.
    enabled: yes
  when: docker_conf.changed or ansible_os_family == "RedHat"