Add telemetry attributes to OTLP payloads (#11125)

Add telemetry attributes to OTLP payloads

Co-authored-by: devflow.devflow-routing-intake <devflow.devflow-routing-intake@kubernetes.us1.ddbuild.io>

Author: mcculls

dd-trace-core/src/main/java/datadog/trace/core/otlp/common/OtlpResourceProto.java

@@ -1,5 +1,6 @@
 package datadog.trace.core.otlp.common;
 
+import static datadog.communication.ddagent.TracerVersion.TRACER_VERSION;
 import static datadog.trace.bootstrap.otlp.common.OtlpAttributeVisitor.STRING;
 import static datadog.trace.core.otlp.common.OtlpCommonProto.LEN_WIRE_TYPE;
 import static datadog.trace.core.otlp.common.OtlpCommonProto.recordMessage;
@@ -26,7 +27,10 @@ private OtlpResourceProto() {}
               "version",
               "service.name",
               "deployment.environment.name",
-              "service.version"));
+              "service.version",
+              "telemetry.sdk.name",
+              "telemetry.sdk.version",
+              "telemetry.sdk.language"));
 
   public static final byte[] RESOURCE_MESSAGE = buildResourceMessage(Config.get());
 
@@ -44,6 +48,9 @@ static byte[] buildResourceMessage(Config config) {
     if (!version.isEmpty()) {
       writeResourceAttribute(buf, "service.version", version);
     }
+    writeResourceAttribute(buf, "telemetry.sdk.name", "datadog");
+    writeResourceAttribute(buf, "telemetry.sdk.version", TRACER_VERSION);
+    writeResourceAttribute(buf, "telemetry.sdk.language", "java");
 
     config
         .getGlobalTags()

dd-trace-core/src/test/java/datadog/trace/core/otlp/common/OtlpResourceProtoTest.java

@@ -1,5 +1,6 @@
 package datadog.trace.core.otlp.common;
 
+import static datadog.communication.ddagent.TracerVersion.TRACER_VERSION;
 import static datadog.trace.api.config.GeneralConfig.ENV;
 import static datadog.trace.api.config.GeneralConfig.SERVICE_NAME;
 import static datadog.trace.api.config.GeneralConfig.TAGS;
@@ -52,6 +53,9 @@ private static Map<String, String> attrs(String... keyValues) {
     for (int i = 0; i < keyValues.length; i += 2) {
       map.put(keyValues[i], keyValues[i + 1]);
     }
+    map.put("telemetry.sdk.name", "datadog");
+    map.put("telemetry.sdk.version", TRACER_VERSION);
+    map.put("telemetry.sdk.language", "java");
     return map;
   }
 
@@ -95,7 +99,7 @@ static Stream<Arguments> resourceMessageCases() {
                 "service.name", "my-service",
                 "region", "us-east",
                 "team", "platform")),
-        // all config values set together
+        // all config values set together; telemetry.sdk.* keys in tags must be ignored
         Arguments.of(
             "service, env, version, and tags all set",
             props(
@@ -118,7 +122,10 @@ static Stream<Arguments> resourceMessageCases() {
                     + "service.version:ignored-version,"
                     + "SERVICE.NAME:ignored-service,"
                     + "DEPLOYMENT.ENVIRONMENT.NAME:ignored-env,"
-                    + "SERVICE.VERSION:ignored-version"),
+                    + "SERVICE.VERSION:ignored-version,"
+                    + "telemetry.sdk.name:ignored-sdk,"
+                    + "telemetry.sdk.version:ignored-version,"
+                    + "telemetry.sdk.language:ignored-language"),
             attrs(
                 "service.name", "my-service",
                 "deployment.environment.name", "staging",