fix(detector-alibaba): suppres internal tracing (#2429)

Author: david-luna

detectors/node/opentelemetry-resource-detector-alibaba-cloud/package.json

@@ -56,7 +56,7 @@
     "@opentelemetry/api": "^1.0.0"
   },
   "dependencies": {
-    "@opentelemetry/resources": "^1.0.0",
+    "@opentelemetry/resources": "^1.10.0",
     "@opentelemetry/semantic-conventions": "^1.27.0"
   },
   "homepage": "https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/detectors/node/opentelemetry-resource-detector-alibaba-cloud#readme"

detectors/node/opentelemetry-resource-detector-alibaba-cloud/src/detectors/AlibabaCloudEcsDetector.ts

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+import { context } from '@opentelemetry/api';
+import { suppressTracing } from '@opentelemetry/core';
 import {
   DetectorSync,
   IResource,
@@ -61,7 +63,10 @@ class AlibabaCloudEcsDetector implements DetectorSync {
    * @param config (unused) The resource detection config
    */
   detect(_config?: ResourceDetectionConfig): IResource {
-    return new Resource({}, this._getAttributes());
+    const attributes = context.with(suppressTracing(context.active()), () =>
+      this._getAttributes()
+    );
+    return new Resource({}, attributes);
   }
 
   /** Gets identity and host info and returns them as attribs. Empty object if fails */

detectors/node/opentelemetry-resource-detector-alibaba-cloud/test/detectors/AlibabaCloudEcsDetectorIntegration.test.ts

@@ -0,0 +1,61 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as assert from 'assert';
+
+import { HttpInstrumentation } from '@opentelemetry/instrumentation-http';
+import {
+  InMemorySpanExporter,
+  SimpleSpanProcessor,
+} from '@opentelemetry/sdk-trace-base';
+import { NodeSDK } from '@opentelemetry/sdk-node';
+import { IResource } from '@opentelemetry/resources';
+
+describe('[Integration] AlibabaCloudEcsDetector', () => {
+  it('should not start spans for detector requests', async () => {
+    const memoryExporter = new InMemorySpanExporter();
+    const sdk = new NodeSDK({
+      instrumentations: [new HttpInstrumentation()],
+      spanProcessors: [new SimpleSpanProcessor(memoryExporter)],
+    });
+
+    sdk.start();
+
+    // NOTE: detectors implementing the `DetectorSync` interface and starting
+    // HTTP requests within the `detect` method will produce Noop Spans since
+    // the SDK resolves the trace provider after resource detectors are triggered.
+    // Ref: https://github.com/open-telemetry/opentelemetry-js/blob/38f6689480d28dcbdafcb7b5ba4b14025328ffda/experimental/packages/opentelemetry-sdk-node/src/sdk.ts#L210-L240
+    //
+    // So having the detector in the config would result in no spans for Alibaba requests
+    // being exported which is what we want. Although we may think we're safe of sending
+    // internal tracing any change that delays these request will result in internal
+    // tracing being exported. We do the detection outside the SDK constructor to have such
+    // scenario.
+    const {
+      alibabaCloudEcsDetector,
+    } = require('../../build/src/detectors/AlibabaCloudEcsDetector');
+    const resource = alibabaCloudEcsDetector.detect() as IResource;
+    await resource.waitForAsyncAttributes?.();
+
+    // Wait for the next loop to let the span close properly
+    await new Promise(r => setTimeout(r, 0));
+    const spans = memoryExporter.getFinishedSpans();
+
+    assert.equal(spans.length, 0, 'no spans exported for GcpDetector');
+
+    await sdk.shutdown();
+  });
+});