add otel app signals dimensions env variable

Author: liustve

lambda-layer/otel-instrument

@@ -27,6 +27,10 @@ export OTEL_LOGS_EXPORTER=${OTEL_LOGS_EXPORTER:-"none"}
 # Enable Application Signals by default if not specified
 export OTEL_AWS_APPLICATION_SIGNALS_ENABLED=${OTEL_AWS_APPLICATION_SIGNALS_ENABLED:-"true"}
 
+if [ -z "${OTEL_METRICS_ADD_APPLICATION_SIGNALS_DIMENSIONS}" ]; then
+  export OTEL_METRICS_ADD_APPLICATION_SIGNALS_DIMENSIONS="true"
+fi
+
 # Append Lambda Resource Attributes to OTel Resource Attribute List
 LAMBDA_RESOURCE_ATTRIBUTES="cloud.region=$AWS_REGION,cloud.provider=aws,faas.name=$AWS_LAMBDA_FUNCTION_NAME,faas.version=$AWS_LAMBDA_FUNCTION_VERSION,faas.instance=$AWS_LAMBDA_LOG_STREAM_NAME,aws.log.group.names=$AWS_LAMBDA_LOG_GROUP_NAME";
 if [ -z "${OTEL_RESOURCE_ATTRIBUTES}" ]; then