Skopeo should be installed in the github jobs level rather than dockerfile

[javorszky]

Version

edge

What Kubernetes platforms are you running on?

Kind

Steps to reproduce

Right now quay skopeo is being tracked in the tests/Dockerfile with a single FROM directive. Skopeo is not used in the tests at all. Its only function is to copy images from Docker to the various registries in copy-images.sh

skopeo has this habit of changing a published version's sha when their base os changes, which means any declared tag:sha pair will become invalid.

Unlike other places, quay seems to remove a tag:sha pair once the sha is updated, which means the older version becomes unavailable and docker pull can't download the image.

Instead we could put the desired docker image version:tag@sha into an environment variable in the GitHub action yaml file and configure renovate to take that into account.

I think renovate's customManagers is a good place to put that config, in case renovate doesn't recognise a docker image string in an env var in a github yaml.

[github-actions]

Hi @javorszky thanks for reporting!

Be sure to check out the docs and the Contributing Guidelines while you wait for a human to take a look at this 🙂

Cheers!