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config: multiline: in_tail: filter_multiline: Add configurable buffer limit for multiline interface #10653

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We added an interface for configurable buffer limit for multiline.
Also, we implemented robust processing for multiline concatenations.


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  • Example configuration file for the change
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cosmo0920 and others added 6 commits July 28, 2025 11:14
Signed-off-by: Hiroshi Hatake <[email protected]>
Co-authored-by: Eduardo Silva <[email protected]>
Signed-off-by: Hiroshi Hatake <[email protected]>
Co-authored-by: Eduardo Silva <[email protected]>
Signed-off-by: Hiroshi Hatake <[email protected]>
Co-authored-by: Eduardo Silva <[email protected]>
Signed-off-by: Hiroshi Hatake <[email protected]>
Co-authored-by: Eduardo Silva <[email protected]>
Signed-off-by: Hiroshi Hatake <[email protected]>
Co-authored-by: Eduardo Silva <[email protected]>
This commit updates the expected output for the 'container_mix' unit test.

Previously, the multiline engine could incorrectly merge pending messages
when the log stream switched between different parser types (e.g., from `docker` to `cri`).
The test's original expectations were written to match this buggy behavior.

Recent fixes have made the engine's state handling more robust and precise.
It now correctly flushes a pending message when the parser context changes,
preventing improper merges. This change aligns the test case with the new, correct logic.

Signed-off-by: Hiroshi Hatake <[email protected]>
Co-authored-by: Eduardo Silva <[email protected]>
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