Fix exemplar for opentel to use traceId instead of spanId and sample …

…only if trace is sampled. Signed-off-by: jianwu <jianwu@gmail.com>
thanos-io · Mar 9, 2023 · ab85c5e · ab85c5e
1 parent 3dea8cf
commit ab85c5e
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/pkg/extprom/http/instrument_server.go b/pkg/extprom/http/instrument_server.go
@@ -97,8 +97,8 @@ func httpInstrumentationHandler(baseLabels prometheus.Labels, metrics *defaultMe
 						// If OpenTracing span not found, try OTEL.
 						if !OTfound {
 							span := trace.SpanFromContext(r.Context())
-							if span != nil {
-								traceID = span.SpanContext().SpanID().String()
+							if span != nil && span.SpanContext().IsSampled() {
+								traceID = span.SpanContext().TraceID().String()
 							}
 						}