add headers

add

Author: tomer-friedman

src/paymentservice/charge.js

@@ -25,7 +25,7 @@ const transactionsCounter = meter.createCounter('app.payment.transactions')
 module.exports.charge = request => {
   const span = tracer.startSpan('charge');
 
-  axios.post('http://localhost:8080/charge', { message: "I'm also in a body!", more: "Fingers crossed", num: 100, bool: true })
+  axios.post('http://localhost:8080/charge', { message: "I'm also in a body!", more: "Fingers crossed", num: 100, bool: true }, { headers: { 'traceloop_id': '12345' } })
   .catch(() => undefined)
 
   const {

src/paymentservice/index.js

@@ -24,7 +24,7 @@ const logger = require('./logger')
 function chargeServiceHandler(call, callback) {
   const span = opentelemetry.trace.getActiveSpan();
 
-  axios.post('http://localhost:8080/charge', { message: "I'm in a body!", more: "Let's hope this works" })
+  axios.post('http://localhost:8080/charge', { message: "I'm in a body!", more: "Let's hope this works" }, { headers: { 'traceloop_id': '12345' } })
     .catch(() => undefined)
 
   try {

src/paymentservice/otel-custom/http.js

@@ -84,6 +84,16 @@ const httpInstrumentationConfig = {
     applyCustomAttributesOnSpan: httpCustomAttributes,
     requestHook: httpCustomAttributesOnRequest,
     responseHook: httpCustomAttributesOnResponse,
+    headersToSpanAttributes: {
+        client: {
+            requestHeaders: ['traceloop_id'],
+            responseHeaders: ['traceloop_id'],
+        },
+        server: {
+            requestHeaders: ['traceloop_id'],
+            responseHeaders: ['traceloop_id'],
+        },
+    },
 };
 
 module.exports = {