Cherry-pick #9958 to 6.x: Support haproxy log lines without captured headers #9968
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Outdated suggestions cannot be applied.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.
Cherry-pick of PR #9958 to 6.x branch. Original message:
Haproxy can capture headers from http requests and responses and log
them. This is not done by default but current filebeat module expects
it.
Make captured headers optional, and collect them only if both request
and response headers are configured. If only one is configured, the log
is parsed but headers not collected as we cannot know if they are
request or response headers.
Fix #9463