Parameter

Parameters

There are 8 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_data: /var/lib/docker      # docker data directory, /var/lib/docker by default
docker_storage_driver: overlay2   # docker storage driver, can be zfs, btrfs
docker_cgroups_driver: systemd    # docker cgroup fs driver: cgroupfs,systemd
docker_registry_mirrors: []       # docker registry mirror list
docker_exporter_port: 9323        # docker metrics exporter port, 9323 by default
docker_image: []                  # docker image to be pulled after bootstrap
docker_image_cache: /tmp/docker/*.tgz # docker image cache glob pattern

docker_enabled

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

enable docker on this node? default value is false

docker_data

name: docker_data, type: path, level: C

Docker data directory, /var/lib/docker by default.

docker_storage_driver

name: docker_storage_driver, type: enum, level: C

Docker storage driver, overlay2 by default.

Please refer to: https://docs.docker.com/engine/storage/drivers/select-storage-driver/

• overlay2
• fuse-overlayfs
• brtfs
• zfs
• vfs

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:

Here are some examples of using the internal network image of each cloud vendor:

["https://docker.m.daocloud.io"]                # domestic DaoCloud image site
["https://docker.1ms.run"]                      # domestic millisecond image site
["https://mirror.ccs.tencentyun.com"]           # tencent cloud intranet image site
["https://registry.cn-hangzhou.aliyuncs.com"]   # aliyun cloud intranet image site, login required

Consider using Cloudflare Worker Docker Proxy

If the pull speed is too slow, you can also consider: docker login quay.io use other Registry.

docker_exporter_port

name: docker_exporter_port, type: port, level: G

Docker metrics exporter port, 9323 by default.

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