From 313b7e7dac497c9563c09d7c8a47af8353e3e6c9 Mon Sep 17 00:00:00 2001
From: Ivan Topolnjak <ivantopo@gmail.com>
Date: Tue, 30 Oct 2018 17:24:54 +0100
Subject: include trace identifiers in HTTP responses, fixes #558

---
 kamon-core/src/main/resources/reference.conf | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'kamon-core/src/main/resources/reference.conf')

diff --git a/kamon-core/src/main/resources/reference.conf b/kamon-core/src/main/resources/reference.conf
index 0fb3ce0a..c6d7a6e8 100644
--- a/kamon-core/src/main/resources/reference.conf
+++ b/kamon-core/src/main/resources/reference.conf
@@ -203,6 +203,7 @@ kamon {
           # Specify mappings between Context keys and the Propagation.EntryReader[HeaderReader] implementation in charge
           # of reading them from the incoming HTTP request into the Context.
           incoming {
+
             # kamon.trace.SpanPropagation$B3 for default header format or kamon.trace.SpanPropagation$B3Simple for 'b3 single' header format.
             span = "kamon.trace.SpanPropagation$B3"
           }
@@ -210,6 +211,7 @@ kamon {
           # Specify mappings betwen Context keys and the Propagation.EntryWriter[HeaderWriter] implementation in charge
           # of writing them to outgoing HTTP requests.
           outgoing {
+
             # kamon.trace.SpanPropagation$B3 for default header format or kamon.trace.SpanPropagation$B3Simple for 'b3 single' header format.
             span = "kamon.trace.SpanPropagation$B3"
           }
@@ -218,6 +220,7 @@ kamon {
     }
 
     binary {
+
       # Default HTTP propagation. Unless specified otherwise, all instrumentation will use the configuration on
       # this section for HTTP context propagation.
       #
@@ -338,6 +341,18 @@ kamon {
             }
           }
 
+          # Controls writing trace and span identifiers to HTTP response headers sent by the instrumented servers. The
+          # configuration can be set to either "none" to disable writing the identifiers on the response headers or to
+          # the header name to be used when writing the identifiers.
+          response-headers {
+
+            # HTTP response header name for the trace identifier, or "none" to disable it.
+            trace-id = "trace-id"
+
+            # HTTP response header name for the server span identifier, or "none" to disable it.
+            span-id = none
+          }
+
           # Custom mappings between routes and operation names.
           operations {
 
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