---- hosts: servers gather_facts: no become: yes tasks: - apt: name: apt-transport-https - apt: name: ca-certificates - apt: name: curl - apt: name: software-properties-common - shell: "apt list --installed |grep docker-ce" register: docker_ce_installed ignore_errors: True - when: docker_ce_installed|failed block: - shell: apt-key list Docker register: apt_key_exists - when: not apt_key_exists.stdout shell: curl -fsSL https://download.docker.com/linux/ubuntu/gpg |apt-key add - - shell: grep download.docker.com /etc/apt/sources.list register: apt_source_docker_exists ignore_errors: True - when: apt_source_docker_exists|failed shell: add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" - apt: update_cache: yes - apt: name: docker-ce