Docker注册表镜像连接到私有不安全注册表

Question

I am having a private registry (JFrog) which is being used within the company. I would like to set up a registry cache for our project that keeps the heavy load off the private registry.

As the documentation states a registry mirror for private registries is not supported although an answer in Mirroring private docker registry states that now it is supported.

I tried myself with the following setup:

[UBUNTU CLIENT] --- [REGISTRY PROXY] --- [PRIVATE REGISTRY]

Registry Proxy is reachable at 192.168.178.111:30222 (running in k8s)

The private registry contains an image with the name myregistry/mypersonalimg:latest

It is kind of working but not the way I'd like it to. If I want to pull the image from the client I have to use the following command

docker pull 192.168.178.111:30222/mypersonalimg:latest

I would have expected docker pull myregistry/mypersonalimg:latest would work but I guess docker will look then for a registry called myregistry.

Answer 1

Setting /etc/docker/daemon.json with registry-mirrors on the client would work for your case. The dockerd on client will attempting the configured mirrors if the pulled image doesn't give repository address.