ansible-role-install-docker

Install Docker using operating system repository. Allows for installation of latest Docker version, or (optionally) a pinned Docker version. Primarily used in kube-ansible.

WARNING

This role will setup the ansible_user in the docker group, allowing for Docker to be run as a non-root user. Unfortunately, that effectively makes the non-root user a root user, which could potentially have security implications in your environment.

Selecting Docker versions

This is optimized primarily for CentOS, and likely works with Fedora. However, you have two options generally for installed Docker.

• RPMs installed from official CentOS repositories.
• Installation from Docker-CE RPM repos.

You may specify the variable docker_repo_type as either ce or os. The value of os is default, and stands for "operating system default", ce is for "community edition" referring to Docker's nomenclature of their product.

For example, to override the default os value, reference the role as:

- { role: ansible-role-install-docker, docker_repo_type: "ce" }

Role Variables

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

Select the repository from which to install Docker.

docker_repo_type: "os"

Set the package base name. If installing from another repository, may need to change the base name to something like docker-engine.

docker_package_base_name: docker

Pin a version of the package to install. If set to latest (the default) then install the latest version of the available Docker package. Does not automatically upgrade on subsequent runs.

docker_package_version: latest

A list of Docker registries to configure for the daemon. These are trusted repositories and must be coming from a trusted SSL certification.

docker_registries: []

A list of Docker registries to configure for the daemon. These are untrusted repositories, and do not require proper certificates. Useful when running a local registry.

docker_insecure_registries: []

A list of Docker registries to block.

docker_block_registries: []

An option to disable allowing docker for a non-root user:

docker_non_root_user: false

Dependencies

None.

Example Playbook

- hosts: docker_host
  become: true
  become_user: root

  roles:
    - { role: install-docker, docker_package_version: '1.12.6' }

Testing

You can locally test a deployment of this role using provision_docker.

cd tests/
ansible-playbook test.yml

License

Apache v2.0

Author Information

This role was created in 2017 by the Red Hat NFVPE Team.