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https://github.com/geerlingguy/ansible-role-docker

Ansible Role - Docker
https://github.com/geerlingguy/ansible-role-docker

ansible centos containers debian docker infrastructure management redhat role server ubuntu

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Ansible Role - Docker

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# Ansible Role: Docker



[![CI](https://github.com/geerlingguy/ansible-role-docker/workflows/CI/badge.svg?event=push)](https://github.com/geerlingguy/ansible-role-docker/actions?query=workflow%3ACI)



An Ansible Role that installs [Docker](https://www.docker.com) on Linux.



## Requirements



None.



## Role Variables



Available variables are listed below, along with default values (see `defaults/main.yml`):



```yaml

# Edition can be one of: 'ce' (Community Edition) or 'ee' (Enterprise Edition).

docker_edition: 'ce'

docker_packages:

    - "docker-{{ docker_edition }}"

    - "docker-{{ docker_edition }}-cli"

    - "docker-{{ docker_edition }}-rootless-extras"

docker_packages_state: present

```



The `docker_edition` should be either `ce` (Community Edition) or `ee` (Enterprise Edition). 

You can also specify a specific version of Docker to install using the distribution-specific format: 

Red Hat/CentOS: `docker-{{ docker_edition }}-` (Note: you have to add this to all packages);

Debian/Ubuntu: `docker-{{ docker_edition }}=` (Note: you have to add this to all packages).



You can control whether the package is installed, uninstalled, or at the latest version by setting `docker_packages_state` to `present`, `absent`, or `latest`, respectively. Note that the Docker daemon will be automatically restarted if the Docker package is updated. This is a side effect of flushing all handlers (running any of the handlers that have been notified by this and any other role up to this point in the play).



```yaml

docker_obsolete_packages:

  - docker

  - docker.io

  - docker-engine

  - podman-docker

  - containerd

  - runc

```



A list of packages to be uninstalled prior to running this role. See [Docker's installation instructions](https://docs.docker.com/engine/install/debian/#uninstall-old-versions) for an up-to-date list of old packages that should be removed.



```yaml

docker_service_manage: true

docker_service_state: started

docker_service_enabled: true

docker_restart_handler_state: restarted

```



Variables to control the state of the `docker` service, and whether it should start on boot. If you're installing Docker inside a Docker container without systemd or sysvinit, you should set `docker_service_manage` to `false`.



```yaml

docker_install_compose_plugin: false

docker_compose_package: docker-compose-plugin

docker_compose_package_state: present

```



Docker Compose Plugin installation options. These differ from the below in that docker-compose is installed as a docker plugin (and used with `docker compose`) instead of a standalone binary.



```yaml

docker_install_compose: true

docker_compose_version: "1.26.0"

docker_compose_arch: "{{ ansible_architecture }}"

docker_compose_path: /usr/local/bin/docker-compose

```



Docker Compose installation options.



```yaml

docker_add_repo: true

```



Controls whether this role will add the official Docker repository. Set to `false` if you want to use the default docker packages for your system or manage the package repository on your own.



```yaml

docker_repo_url: https://download.docker.com/linux

```



The main Docker repo URL, common between Debian and RHEL systems.



```yaml

docker_apt_release_channel: stable

docker_apt_arch: "{{ 'arm64' if ansible_architecture == 'aarch64' else 'amd64' }}"

docker_apt_repository: "deb [arch={{ docker_apt_arch }}] {{ docker_repo_url }}/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"

docker_apt_ignore_key_error: True

docker_apt_gpg_key: "{{ docker_repo_url }}/{{ ansible_distribution | lower }}/gpg"

docker_apt_filename: "docker"

```



(Used only for Debian/Ubuntu.) You can switch the channel to `nightly` if you want to use the Nightly release.



You can change `docker_apt_gpg_key` to a different url if you are behind a firewall or provide a trustworthy mirror.

Usually in combination with changing `docker_apt_repository` as well. `docker_apt_filename` controls the name of the source list file created in `sources.list.d`. If you are upgrading from an older (<7.0.0) version of this role, you should change this to the name of the existing file (e.g. `download_docker_com_linux_debian` on Debian) to avoid conflicting lists.



```yaml

docker_yum_repo_url: "{{ docker_repo_url }}/{{ (ansible_distribution == 'Fedora') | ternary('fedora','centos') }}/docker-{{ docker_edition }}.repo"

docker_yum_repo_enable_nightly: '0'

docker_yum_repo_enable_test: '0'

docker_yum_gpg_key: "{{ docker_repo_url }}/centos/gpg"

```



(Used only for RedHat/CentOS.) You can enable the Nightly or Test repo by setting the respective vars to `1`.



You can change `docker_yum_gpg_key` to a different url if you are behind a firewall or provide a trustworthy mirror.

Usually in combination with changing `docker_yum_repository` as well.



```yaml

docker_users:

  - user1

  - user2

```



A list of system users to be added to the `docker` group (so they can use Docker on the server).



```yaml

docker_daemon_options:

  storage-driver: "devicemapper"

  log-opts:

    max-size: "100m"

```



Custom `dockerd` options can be configured through this dictionary representing the json file `/etc/docker/daemon.json`.



## Use with Ansible (and `docker` Python library)



Many users of this role wish to also use Ansible to then _build_ Docker images and manage Docker containers on the server where Docker is installed. In this case, you can easily add in the `docker` Python library using the `geerlingguy.pip` role:



```yaml

- hosts: all



  vars:

    pip_install_packages:

      - name: docker



  roles:

    - geerlingguy.pip

    - geerlingguy.docker

```



## Dependencies



None.



## Example Playbook



```yaml

- hosts: all

  roles:

    - geerlingguy.docker

```



## License



MIT / BSD



## Sponsors



* [We Manage](https://we-manage.de): Helping start-ups and grown-ups scaling their infrastructure in a sustainable way.



The above sponsor(s) are supporting Jeff Geerling on [GitHub Sponsors](https://github.com/sponsors/geerlingguy). You can sponsor Jeff's work too, to help him continue improving these Ansible open source projects!



## Author Information



This role was created in 2017 by [Jeff Geerling](https://www.jeffgeerling.com/), author of [Ansible for DevOps](https://www.ansiblefordevops.com/).