spring/spring-boot
1
0
Fork 0
mirror of https://github.com/spring-projects/spring-boot.git synced 2026-09-17 12:09:16 +00:00
Code Issues Projects Releases Wiki Activity

Add baggage tag fields to spans with OpenTelemetry

Browse Source 
With OpenTelemetry, fields listed in management.tracing.baggage.tag-fields
only became span tags when the application itself touched the baggage
through the Tracer API. Baggage that arrived with a request was
propagated correctly, but spans were not tagged with it (see
micrometer-metrics/tracing#933).

This commit registers Micrometer Tracing's BaggageTaggingSpanProcessor
whenever baggage is enabled and at least one tag field is configured, so
that spans are tagged with the baggage that is present in their parent
context. A custom BaggageTaggingSpanProcessor bean backs off the
auto-configured one. The tag-fields property is now also mentioned in
the baggage section of the tracing documentation.

See gh-51656

Signed-off-by: Oleksandr Shevchenko <oleksandr.shevchenko@datarobot.com>
This commit is contained in:
Oleksandr Shevchenko
2026-09-11 11:18:02 +01:00
committed by Andy Wilkinson
parent 924d10733e
commit ce75f008b0
3 changed files with 91 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
documentation/spring-boot-docs/src/docs/antora/modules/reference/pages/actuator/tracing.adoc
+3
View File
@@ -236,6 +236,9 @@ Baggage is propagated wherever Micrometer Observation instruments the transport,
If you want to propagate the baggage to the MDC, use the configprop:management.tracing.baggage.correlation.fields[] configuration property.
For the example above, setting this property to `baggage1` results in an MDC entry named `baggage1`.
If you want baggage values to be added as tags on spans, use the configprop:management.tracing.baggage.tag-fields[] configuration property.
For the example above, setting this property to `baggage1` results in spans that are tagged with `baggage1=value1`.
[[actuator.micrometer-tracing.tests]]