[receiver/loki] Add support of structured metadata #40095
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mar4uk
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songy23
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May 20, 2025
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue. Ex. Adding a feature - Explain what this achieves.--> #### Description Added support for [Structured Metadata](https://grafana.com/docs/loki/latest/get-started/labels/structured-metadata/). If Structured Metadata is present in the loki log entry it will be converted to Log Record Attributes <!-- Issue number (e.g. #1234) or full URL to issue, if applicable. --> #### Link to tracking issue Fixes #40095 <!--Describe what testing was performed and which tests were added.--> #### Testing Added a unit test to verify the translation of Structured metadata to log record attributes Co-authored-by: Antoine Toulme <[email protected]>
dragonlord93
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May 23, 2025
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue. Ex. Adding a feature - Explain what this achieves.--> #### Description Added support for [Structured Metadata](https://grafana.com/docs/loki/latest/get-started/labels/structured-metadata/). If Structured Metadata is present in the loki log entry it will be converted to Log Record Attributes <!-- Issue number (e.g. open-telemetry#1234) or full URL to issue, if applicable. --> #### Link to tracking issue Fixes open-telemetry#40095 <!--Describe what testing was performed and which tests were added.--> #### Testing Added a unit test to verify the translation of Structured metadata to log record attributes Co-authored-by: Antoine Toulme <[email protected]>
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Component(s)
receiver/loki
Is your feature request related to a problem? Please describe.
The loki receiver component ingests data in Loki format. If data contains structured metadata, it is currently not being translated to OTLP and is dropped
Describe the solution you'd like
Add support for structured metadata. It should be present in the OTLP representation as log record attributes
Describe alternatives you've considered
No response
Additional context
The initial feature request #29634. It was mostly about loki exporter.
We are not going to add structured metadata support to the loki exporter, but loki receiver shouldn't drop structured metadata
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