Update Base Prow Images

[NiJuFirenzia]

It looks like the Prow Base Images have not been updated past July 19th 2025 (https://github.com/kubernetes-sigs/prow/blob/main/.ko.yaml). The base images are still from the previous gcr.io registry. Can we get these updated so new Prow images created have up to date base images?

[petr-muller]

This is related to kubernetes/test-infra#35968 / kubernetes/test-infra#35799 , right?

@BenTheElder @upodroid what's the right sequence here? I guess something like kubernetes/test-infra#35799 needs to merge (although Ben says that maybe not - the base images are still built in k/test-infra though) builds images and then we can update and also set up some automatic bumping like suggested in kubernetes/test-infra#35968 (comment) .

Will the new base images be published somewhere else than gcr.io?

[upodroid]

Hey, I have a solution to this problem.

We'll introduce an autobumper to the prow repo to fetch the latest images from gcr.io/k8s-staging-test-infra

We'll have dependabot bumping images in the test-infra repositories and we should have an automated loop for dep bumps. We can intervene in the very unlikely chance that we ship a bad update.

I need @BenTheElder to merge my dependabot PR.

[petr-muller]

Makes sense, thanks! Voiced support in your dependabot PR, I can set up the autobumper afterwards.