From 825fe58d0736d4104e584e5825ca08988c6d9fc1 Mon Sep 17 00:00:00 2001
From: Lei Wang <66336933+wangzlei@users.noreply.github.com>
Date: Mon, 30 Sep 2024 10:16:27 -0700
Subject: [PATCH] Add aws.pulse.over.midlina attribute for lambda spans (#266)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

*Description of changes:*

Add `aws.pulse.over.midlina` for lambda spans when AppSignals is
enabled, so server side can use it to determine whether it should
generate EMF metrics

```

2024-09-27T15:19:32.789-07:00 | 'faas.name': 'aws-opentelemetry-distro-nodejs', | 2024/09/27/[$LATEST]af2cea6e28a94c24aa098ed39567d85b
-- | -- | --
  | 2024-09-27T15:19:32.789-07:00 | 'faas.version': '$LATEST', | 2024/09/27/[$LATEST]af2cea6e28a94c24aa098ed39567d85b
  | 2024-09-27T15:19:32.789-07:00 | 'faas.instance': '2024/09/27/[$LATEST]af2cea6e28a94c24aa098ed39567d85b', | 2024/09/27/[$LATEST]af2cea6e28a94c24aa098ed39567d85b
  | 2024-09-27T15:19:32.789-07:00 | 'aws.log.group.names': '/aws/lambda/aws-opentelemetry-distro-nodejs', | 2024/09/27/[$LATEST]af2cea6e28a94c24aa098ed39567d85b
  | 2024-09-27T15:19:32.789-07:00 | 'aws.pulse.over.midlina': 'true'

```

By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice.
---
 lambda-layer/src/otel-instrument | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lambda-layer/src/otel-instrument b/lambda-layer/src/otel-instrument
index 402d95d8d..2735f500c 100755
--- a/lambda-layer/src/otel-instrument
+++ b/lambda-layer/src/otel-instrument
@@ -107,6 +107,7 @@ if [ "${OTEL_AWS_APPLICATION_SIGNALS_ENABLED}" = "true" ]; then
     if [ -z "${OTEL_METRICS_EXPORTER}" ]; then
         export OTEL_METRICS_EXPORTER="none";
     fi
+    export LAMBDA_RESOURCE_ATTRIBUTES="aws.pulse.over.midlina=true,${LAMBDA_RESOURCE_ATTRIBUTES}"
 fi
 
 # - If Application Signals is disabled