- name: Check if Docker is installed
  command: rpm -q docker
  register: pkg_check
  failed_when: pkg_check.rc > 1
  changed_when: no

- name: Upgrade Docker
  command: "{{ ansible_pkg_mgr}} update -y docker"
  when: pkg_check.rc == 0 and g_docker_version.curr_version | version_compare('1.9','<')
  register: docker_upgrade

- name: Restart Docker
  command: systemctl restart docker
  when: docker_upgrade | changed