[8.x](backport #41424) [libbeat]: Add lowercase processor #41526
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Outdated suggestions cannot be applied.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.
Proposed commit message
Part of #22254
This PR implements the
lowercase
processor. It continues the implementation done here #34022. It converts event keys that match the provided fields to lowercase. It performs case insensitive matching by defaultExample:
NewAlterFieldProcessor
can be used to extenduppercase
processor.This is an automatic backport of pull request #41424 done by [Mergify](https://mergify.com).