Install docker from official repository. This playbook use this page to install docker. Before installing docker, this playbook install all required system packages. Than, add docker GPG key from official repository. After, add docker-ce repository to apt. Finally, it will install docker, run and enable to run in the background. After docker is installed, the playbook will install docker module for python using python3 as interpreter. This part is necessary to use docker without sudo, for more information access this. It create docker group, add current user in this group and change docker directory ownership and permissions to current user.
- ansible_python_interpreter: explicitly uses python3 as interpreter. (More information)[https://docs.ansible.com/ansible/latest/reference_appendices/python_3_support.html#using-python-3-on-the-managed-machines-with-commands-and-playbooks]
- repository: stable docker repository
- gpg_key: url for gpg key to be added using
deb822 module. - debian_stable_codename: If docker is been installed on a testing or unstable Debian system, define this variable with lastest Debian stable codename. It can be used to install docker from other Debian versions, except unstable or testing.