Only create PTR records for endpoints with hostname defined #6623
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
1. Why is this pull request needed and what does it do?
Per discussion in https://kubernetes.slack.com/archives/C09QYUH5W/p1713088975540039,
We should only be creating PTR records for Endpoints that have a hostname defined in the endpoint address object.
This should normally result in producing one PTR record for each IP, even if multiple Services select the same Pod. K8s enforces that only one endpoints has a hostname defined at any time. If for some reason more than one have hostname defined, we will return both rather than select one arbitrarily - but IIUC, this would only happen if something is awry in k8s.
2. Which issues (if any) are related?
https://kubernetes.slack.com/archives/C09QYUH5W/p1713088975540039
3. Which documentation changes (if any) need to be made?
4. Does this introduce a backward incompatible change or deprecation?