Can we change kubernetes image registry search list?

Question

For example, I have an internal docker registry for my kube cluster, hosted on internal-docker-registry.io:5000.

When the pod from the kube cluster pulling image busybox, I don't want to pull from docker hub docker.io. But instead I want it to pull from internal-docker-registry.io:5000.

Note that I cannot change the image name to internal-docker-registry.io:5000/busybox since I don't own the spec and there are too man these kind of third party image in my cluster.

https://stackoverflow.com/questions/33054369/how-to-change-the-default-docker-registry-from-docker-io-to-my-private-registry — erik258, Oct 08 '21 at 15:09
See also [How to change default K8s cluster registry?](https://stackoverflow.com/questions/66026479/how-to-change-default-k8s-cluster-registry) which asks the same question. As the question @DanielFarrell mentions indicates, there is no "image registry search list"; an image name without a registry _always_ uses `docker.io`, to avoid surprises where _e.g._ `FROM ubuntu` means something different depending on local configuration. — David Maze, Oct 08 '21 at 15:44

score 1 · Accepted Answer · answered Oct 11 '21 at 08:48

I have posted community wiki answer to summarize the topic:

As David Maze well mentioned in the comment:

there is no "image registry search list"; an image name without a registry always uses docker.io, to avoid surprises where e.g. FROM ubuntu means something different depending on local configuration.

So if you can't change the image name to internal-docker-registry.io:5000/busybox then unfortunately you don't have the option to get the image from your private registry (according to David's comment).

Can we change kubernetes image registry search list?

2 Answers2