Document node.alpha.kubernetes.io/ttl label

[pmady]

Fixes #53889

This PR adds documentation for the deprecated node.alpha.kubernetes.io/ttl label in the Well-Known Labels, Annotations and Taints reference page.

What this PR does:

• Documents the node.alpha.kubernetes.io/ttl label that was historically used by tools like minikube
• Marks it as deprecated with a clear note that it has no effect in current Kubernetes versions
• Explains that it may still be set by older tools for backward compatibility

Why this is needed:

As mentioned in the issue, the Well-Known Labels, Annotations and Taints page serves as a coordination point for assigning values. It's important to register all labels that are or have been used, even deprecated ones, to maintain a complete reference.

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[lmktfy]

When people write reviews (and, because this is open source, anyone can) the key question to considerbis: does this change make the documentation better than it started.

This one is easy to say that about, so:
/lgtm
/approve

[lmktfy]

I am not really sure what this actually does, but registering it with an incomplete explanation is much better than not registering it at all.

[lmktfy]

Oops, I didn't notice the commit message.
/lgtm cancel
/approve cancel

Do you know how to amend the commit @pmady? If you have amended it and are using the git tool, you would then run git push --force-with-lease to replace the remote branch with your updated changes.

[lmktfy]

Here's how to fix the commit message:

 Document node.alpha.kubernetes.io/ttl label
    
 Add documentation for the deprecated node.alpha.kubernetes.io/ttl label
 in the Well-Known Labels, Annotations and Taints reference page.
     
 This label was historically used by tools like minikube to set a
 time-to-live value for nodes. The label is deprecated and has no effect
 in current Kubernetes versions, but may still be set by older tools for
 backward compatibility.
-   
-Fixes #53889
-   
-Signed-off-by: pmady <[email protected]>

This doesn't need a DCO or commit message signoff. You did need to sign the CLA; I see that you have done so.

[pmady]

@lmktfy fixed the commit message. Thanks

[sshehrozali]

@pmady this is still not fixed yet, look at the last line of your commit message.

[pmady]

/retest

[k8s-ci-robot]

@pmady: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

Details

In response to this:

/retest

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[tengqm]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Details

Git tree hash: a419cbcd5e4e754caa58356d567966fb292c465c

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tengqm

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