A pretty complete playbook example to install Docker and configure it for multiple users, expose the Docker API, configure a Docker registry and create a Docker network.

---
- hosts: docker_servers
  become: true
  roles:
    - ansible-role-docker
  vars:
    docker_users:
      - titou
      - antoine
    docker_data_dir: /opt/docker
    docker_expose_api: true
    docker_registry_url: "docker.io"
    docker_registry_email: "user@example.com"
    docker_networks:
      - name: "my-network"
        driver: "bridge"
        subnet: "172.20.0.0/16"
        gateway: "172.20.0.1"
        ip_range: "172.20.0.0/24"

⚠️ SECURITY WARNING: Exposing Docker API over TCP without TLS is insecure : consider using TLS or restrict access with firewall rules.

You can also use the role in its most simple form:

---
- hosts: docker_servers
  become: true
  roles:
    - ansible-role-docker

Variables

Basic Configuration

Variable	Required	Default	Description
`docker_api_host`	No	`127.0.0.1`	Host address to expose Docker API on (when `docker_expose_api` is true)
`docker_api_port`	No	`2375`	Port to expose Docker API on (when `docker_expose_api` is true)
`docker_arch`	No	`amd64`	Architecture to install Docker for (e.g., "amd64", "arm64")
`docker_data_dir`	No	``	Directory to store Docker volumes data
`docker_expose_api`	No	`false`	Whether to expose Docker API over TCP
`docker_networks`	No	`[]`	List of networks to create (dicts with name, driver, subnet, etc.)
`docker_registry_email`	No	``	Registry email (mutually exclusive with `docker_registry_username`)
`docker_registry_url`	No	``	Docker registry URL (registry authentication is skipped if not set)
`docker_registry_username`	No	``	Registry username (mutually exclusive with `docker_registry_email`)
`docker_users`	No	`[]`	List of users to be added to the `docker` group

Note: When using registry authentication, the registry password must be provided via the DOCKER_REGISTRY_PASSWORD environment variable.

License

This project is licensed under the GNU General Public License v3.0 or later (GPLv3+). See the LICENSE file for details.