do not copy any tags by default

2 files changed, 9 insertions, 4 deletions

diff --git a/kamon-core-tests/src/test/resources/reference.conf b/kamon-core-tests/src/test/resources/reference.conf
index 9d99ba96..c092af08 100644
--- a/kamon-core-tests/src/test/resources/reference.conf
+++ b/kamon-core-tests/src/test/resources/reference.conf
@@ -22,6 +22,7 @@ kamon {
     http-server {
       default {
         tracing.preferred-trace-id-tag = "correlation-id"
+        tracing.tags.from-context.peer = span
       }
 
       no-span-metrics {
diff --git a/kamon-core/src/main/resources/reference.conf b/kamon-core/src/main/resources/reference.conf
index cb658d23..a35225d4 100644
--- a/kamon-core/src/main/resources/reference.conf
+++ b/kamon-core/src/main/resources/reference.conf
@@ -313,12 +313,16 @@ kamon {
             # Use the http.status_code tag.
             status-code = metric
 
-            # Copy tags from the context into the Spans with the specified purpouse.
+            # Copy tags from the context into the Spans with the specified purpouse. For example, to copy a customer_type
+            # tag from the context into the HTTP Server Span created by the instrumentation, the following configuration
+            # should be added:
+            #
+            # from-context {
+            #   customer_type = span
+            # }
+            #
             from-context {
 
-              # The peer tag identifiest the service that is calling the current service. It is added by default with
-              # the HttpClient instrumentation.
-              peer = metric
             }
           }