Get image name from ConfigMap

[adampl]

What would you like to be added:

In Container spec, add an imageFrom field (similar to envFrom) so the image name can be set by updating a config map value referenced in this field.

Why is this needed:

It's a bad practice to use the same image name for different image versions, but it's also a poor idea to modify the config every time you upgrade the image. Config file templates with image name placeholders are a common (and ugly) workaround. Apparently lots of users don't approve of the current approach: #33664. It would be nice to just get the value for the container's image field from a ConfigMap whenever image pull is triggered.

/sig apps

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[adampl]

/remove-lifecycle stale

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[adampl]

/remove-lifecycle rotten

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[k8s-ci-robot]

@fejta-bot: Closing this issue.

In response to this:

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