centralize updating utility / debug image version in samples

[BenTheElder]

This is a Feature Request

What would you like to be added

Why is this needed

In cases like https://github.com/kubernetes/website/pull/47735/files we're using somewhat arbitrary tags for the util / debug image.

Setting aside for a moment which image we should use, and the naming ... I think maybe we should store the current tag in one place and reference it with a shortcut, that way we can bump all references at once.

The test commands used should be stable, things like dig, so we can just update the references and avoid complaints about "the sample image isn't patched".

WDYT?

Comments

I suspect @sftim is a good person to ask here, if they have time :-)

cc @aojea @pohly @thockin @dims

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[sftim]

We can put a file inside data/ that contains this information. And, because it can be TOML or YAML (or JSON or CSV), we don't have to store just the data for one image, we can actually store it for several.

Then make a shortcode to look up the tag (or image URL including tag) based on that data file.

[BenTheElder]

We did something like that in kind for the install docs to refer to the current version and it has been really nice.

/assign