Parameter

Parameters

There are 5 parameters for the Docker module:

Defaults

Docker’s default parameters are defined in roles/docker/defaults/main.yml

docker_enabled: false             # enable docker on this node?
docker_cgroups_driver: systemd    # docker cgroup fs driver: cgroupfs,systemd
docker_registry_mirrors: []       # docker registry mirror list
docker_image: []                  # docker image to be pulled after bootstrap
docker_image_cache: /tmp/docker/*.tgz # docker image cache file/glob, `/tmp/docker/*.tgz` by default 

docker_enabled

name: docker_enabled, type: bool, level: G/C/I

enable docker on this node? default value is false

docker_cgroups_driver

name: docker_cgroups_driver, type: enum, level: G/C/I

docker cgroup fs driver, could be cgroupfs or systemd, default values: systemd

docker_registry_mirrors

name: docker_registry_mirrors, type: string[], level: G/C/I

docker registry mirror list, default values: [], Example:

[ "https://mirror.ccs.tencentyun.com" ]         # tencent cloud mirror, intranet only
["https://registry.cn-hangzhou.aliyuncs.com"]   # aliyun cloud mirror, login required

docker_image

name: docker_image, type: string[], level: G/C/I

docker image to be pulled, [] by default

Image listed here will be pulled during docker provisioning.

docker_image_cache

name: docker_image_cache, type: path, level: G/C/I

docker image cache tarball glob list, "/tmp/docker/*.tgz" by default.

The local docker image cache with .tgz suffix match this glob list will be loaded into docker one by one:

cat *.tgz | gzip -d -c - | docker load