Docker - Ansible Role

This role will fully configure and install Docker on the following platforms:

• RHEL/CentOS 7
• Debian/Ubuntu

this role only supports docker versions 1.11+.

Requirements

• OS: CentOS 7 or Ubuntu
• Connectivity to docker-ce package repository (https://download.docker.com)

Role Variables

The following variables can be used to customize the docker installation:

# OS related -------------------------------------------------------------------
## use official docker repository
docker_repo_enabled: true
## choose docker repo channel enable status
docker_repo_channel_stable_enabled: true
docker_repo_channel_edge_enabled: false
docker_repo_channel_test_enabled: false
## name of docker package to install
docker_pkg_name: "docker-ce"
## state of package (present, latest, exc.)
docker_pkg_state: present
## name of docker service
docker_service_name: "docker"
## should docker daemon start on boot?
docker_service_enable: true
## name group for docker socket file
docker_group: "docker"
## should we install python-docker-py for ansible docker modules?
docker_install_py_module: false

# Proxy related ----------------------------------------------------------------
## should docker daemon use a proxy for outbound connections?
docker_proxy_enabled: false
## list of env variables we should set (comment out the ones you don't need)
docker_proxy_env:
  - "HTTP_PROXY=http://proxy.example.com:80/"
  - "HTTP_PROXY=https://proxy.example.com:443/"
  - "NO_PROXY=localhost,127.0.0.1,internalhub.example.com"

# docker client configuration --------------------------------------------------
## enable authentication for docker registry
docker_client_config_enabled: false
## the location we should push client configuration
docker_client_config_location: "/root/.docker/config.json"
# for auth (docker login) use something like:
#docker_client_config:
#  auths:
#    "https://test.tld:1234":
#      auth: "SOME_STRING"
#      email: "SOME_EMAIL"

# default dockerd configuration options ----------------------------------------
## https://docs.docker.com/engine/reference/commandline/dockerd/#/linux-configuration-file
docker_config_graph: "/var/lib/docker"
docker_config_log_driver: ""
docker_config_log_opts: {}
docker_config_max_concurrent_downloads: 3
docker_config_max_concurrent_uploads: 5
docker_config_debug: false
docker_config_log_level: ""
docker_config_bridge: ~
docker_config_bip: "172.16.0.1/24"
docker_config_fixed_cidr: "172.16.0.0/24"
docker_config_fixed_cidr_v6: ""
docker_config_default_gateway: ""
docker_config_default_gateway_v6: ""
docker_config_selinux_enabled: false
docker_config_ip: "0.0.0.0"
docker_config_group: "{{ docker_group }}"
docker_config_insecure_registries: []

# additional custom docker settings can be added to this dict:
docker_config_custom: {}

Example Playbooks

Install latest docker stable release on your local centos server

- hosts: localhost
  roles:
     - { role: gbolo.docker, docker_pkg_state: latest }

Install latest docker edge release on your local centos server

- hosts: localhost
  roles:
     - { role: gbolo.docker, docker_pkg_state: latest, docker_repo_channel_edge_enabled: true }

Install older docker stable release on your local centos server

- hosts: localhost
  roles:
     - { role: gbolo.docker, docker_pkg_name: docker-ce-18.03.1.ce-1.el7.centos }

Advanced playbook with various variables applied

- hosts: localhost
  vars:
    # store docker containers/images to /opt/docker
    docker_config_graph: /opt/docker
    # change default docker bridge subnet
    docker_config_bip: 172.16.77.77/24
    # set default log driver to journald
    docker_config_log_driver: journald
    # use docker_config_custom to define additional settings not listed above
    docker_config_custom:
      # enable experimental mode
      experimental: true
      # expose docker api over socket file and tcp
      hosts:
        - unix:///var/run/docker.sock
        - tcp://0.0.0.0:2376
      # set default search domains
      dns-search:
        - lab1.linuxctl.com
        - lab2.linuxctl.com

  roles:
    - role: gbolo.docker

Author and License

docker role written by:

• George Bolo | linuxctl.com

License: MIT

FREE SOFTWARE, HELL YEAH!