Minimal container registry

[mwopfner]

Hi, I'm looking for a small lib (with little external dependencies) to spin up a local container registry from my own golang CLI tool.
It is only used for development and testing.

I found zot (https://github.com/project-zot/zot) but this has a huge dependency list. Because I already use containers/image I was wondering myself if there are such functions in the containers/* repos which are used to spinup a small registry for testing.

[afbjorklund]

https://docs.docker.com/registry/

https://github.com/containers/podman/blob/main/hack/podman-registry

$ podman-registry start
PODMAN_REGISTRY_IMAGE="docker.io/library/registry:2.8"
PODMAN_REGISTRY_PORT="5050"
PODMAN_REGISTRY_USER="userZ3RZ"
PODMAN_REGISTRY_PASS="T8JVJzKrcl4p6uT"

https://github.com/distribution/distribution

[mwopfner]

Yes bigger projects are easy to find 😉
I actually only want a golang lib which allows me to start a simple registry from my own cli tool.

[afbjorklund]

It's mostly a glorified webserver, so with the right framework I think it should be rather small ?

[mwopfner]

Yes, that's correct. It's not much, that is why I hoped there is a small implementation somewhere where I can start from or which I could reuse. If there is nothing I probably have to write it by myself.

[afbjorklund]

A small and portable registry server would be useful to have, it could be used to cache images on the host for "machine".

Currently we are resorting to ugly measures such as save and load, but lose all the layer niceties from push and pull

[afbjorklund]

The docker registry is not enormous (24M), but I'm not sure it would work as a standalone program on e.g. Mac or Win ?

REPOSITORY   TAG       IMAGE ID       CREATED      SIZE
registry     2         8db46f9d7550   7 days ago   24.2MB

Some kind of PoC would be interesting, maybe I will hack something together... This looks neat: https://echo.labstack.com/