[Monitor OpenTelemetry][Monitor OpenTelemetry Exporter] Update Internal Version to Match Spec (#33298)

### Packages impacted by this PR
@azure/monitor-opentelemetry
@azure/monitor-opentelemetry-exporter

### Describe the problem that is addressed by this PR
We should be able to differentiate between the application insights
shim, azure monitor distro, and exporter.

### Are there test cases added in this PR? _(If not, why?)_
Yes

### Command used to generate this PR:**_(Applicable only to SDK release
request PRs)_

### Checklists
- [x] Added impacted package name to the issue description
- [ ] Does this PR needs any fixes in the SDK Generator?** _(If so,
create an Issue in the
[Autorest/typescript](https://github.com/Azure/autorest.typescript)
repository and link it here)_
- [x] Added a changelog (if necessary)

Author: JacksonWeber

sdk/monitor/monitor-opentelemetry-exporter/CHANGELOG.md

@@ -5,6 +5,8 @@
 ### Other Changes
 
 - Filter OpenTelemetry semantic attributes from being double recorded as custom dimensions.
+- Add support for detecting the Application Insights shim on internal verison.
+
 ## 1.0.0-beta.29 (2025-03-04)
 
 ### Features Added

sdk/monitor/monitor-opentelemetry-exporter/src/Declarations/Constants.ts

@@ -92,6 +92,21 @@ export enum RetriableRestErrorTypes {
   REQUEST_SEND_ERROR = "REQUEST_SEND_ERROR",
   DNS_LOOKUP_TIMEOUT = "EAI_AGAIN",
 }
+/**
+ * Application Insights shim version.
+ * @internal
+ */
+export const ENV_APPLICATIONINSIGHTS_SHIM_VERSION = "APPLICATION_INSIGHTS_SHIM_VERSION";
+/**
+ * Azure Monitor version prefix.
+ * @internal
+ */
+export const ENV_AZURE_MONITOR_PREFIX = "AZURE_MONITOR_PREFIX";
+/**
+ * Azure Monitor Distro version.
+ * @internal
+ */
+export const ENV_AZURE_MONITOR_DISTRO_VERSION = "AZURE_MONITOR_DISTRO_VERSION";
 
 /**
  * QuickPulse metric counter names.

sdk/monitor/monitor-opentelemetry-exporter/src/platform/nodejs/context/context.ts

@@ -7,6 +7,11 @@ import { ATTR_TELEMETRY_SDK_VERSION } from "@opentelemetry/semantic-conventions"
 import { KnownContextTagKeys } from "../../../generated/index.js";
 import * as ai from "../../../utils/constants/applicationinsights.js";
 import type { Tags } from "../../../types.js";
+import {
+  ENV_AZURE_MONITOR_PREFIX,
+  ENV_APPLICATIONINSIGHTS_SHIM_VERSION,
+  ENV_AZURE_MONITOR_DISTRO_VERSION,
+} from "../../../Declarations/Constants.js";
 
 let instance: Context | null = null;
 
@@ -39,13 +44,23 @@ export class Context {
     Context.opentelemetryVersion = SDK_INFO[ATTR_TELEMETRY_SDK_VERSION];
     Context.sdkVersion = ai.packageVersion;
 
-    const prefix = process.env["AZURE_MONITOR_PREFIX"] ? process.env["AZURE_MONITOR_PREFIX"] : "";
-    const version = process.env["AZURE_MONITOR_DISTRO_VERSION"]
-      ? `ext${process.env["AZURE_MONITOR_DISTRO_VERSION"]}`
-      : `ext${Context.sdkVersion}`;
+    const prefix = process.env[ENV_AZURE_MONITOR_PREFIX]
+      ? process.env[ENV_AZURE_MONITOR_PREFIX]
+      : "";
+    const version = this._getVersion();
     const internalSdkVersion = `${prefix}node${Context.nodeVersion}:otel${Context.opentelemetryVersion}:${version}`;
     this.tags[KnownContextTagKeys.AiInternalSdkVersion] = internalSdkVersion;
   }
+
+  private _getVersion(): string {
+    if (process.env[ENV_APPLICATIONINSIGHTS_SHIM_VERSION]) {
+      return `sha${process.env[ENV_APPLICATIONINSIGHTS_SHIM_VERSION]}`;
+    } else if (process.env[ENV_AZURE_MONITOR_DISTRO_VERSION]) {
+      return `dst${process.env[ENV_AZURE_MONITOR_DISTRO_VERSION]}`;
+    } else {
+      return `ext${Context.sdkVersion}`;
+    }
+  }
 }
 
 /**

sdk/monitor/monitor-opentelemetry-exporter/test/internal/context.spec.ts

@@ -42,8 +42,21 @@ describe("context.ts", () => {
       "Wrong ai.internal.sdkVersion",
     );
     assert.ok(
-      context.tags["ai.internal.sdkVersion"].endsWith(":ext_testDistroVersion"),
+      context.tags["ai.internal.sdkVersion"].endsWith(":dst_testDistroVersion"),
       "Wrong ai.internal.sdkVersion",
     );
   });
+  it("caputres the shim version when present", () => {
+    const originalEnv = process.env;
+    const newEnv = <{ [id: string]: string }>{};
+    newEnv["APPLICATION_INSIGHTS_SHIM_VERSION"] = "_testShimVersion";
+    process.env = newEnv;
+    const context = new Context();
+    context["_loadInternalContext"]();
+    assert.ok(
+      context.tags["ai.internal.sdkVersion"].endsWith(":sha_testShimVersion"),
+      "Wrong ai.internal.sdkVersion",
+    );
+    process.env = originalEnv;
+  });
 });

sdk/monitor/monitor-opentelemetry/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Release History
 
+## 1.9.1 ()
+
+## Other Changes
+
+- Add support for detecting the Application Insights shim on internal verison.
+
 ## 1.9.0 (2025-03-04)
 
 ### Features Added

sdk/monitor/monitor-opentelemetry/src/metrics/quickpulse/utils.ts

@@ -62,6 +62,7 @@ import { SDK_INFO, hrTimeToMilliseconds } from "@opentelemetry/core";
 import type { Histogram, ResourceMetrics } from "@opentelemetry/sdk-metrics";
 import { DataPointType } from "@opentelemetry/sdk-metrics";
 import {
+  APPLICATION_INSIGHTS_SHIM_VERSION,
   AZURE_MONITOR_AUTO_ATTACH,
   AZURE_MONITOR_OPENTELEMETRY_VERSION,
   AZURE_MONITOR_PREFIX,
@@ -85,11 +86,20 @@ import { Logger } from "../../shared/logging";
 export function getSdkVersion(): string {
   const { nodeVersion } = process.versions;
   const opentelemetryVersion = SDK_INFO[SEMRESATTRS_TELEMETRY_SDK_VERSION];
-  const version = `ext${AZURE_MONITOR_OPENTELEMETRY_VERSION}`;
+  const version = getSdkVersionType();
   const internalSdkVersion = `${process.env[AZURE_MONITOR_PREFIX] ?? ""}node${nodeVersion}:otel${opentelemetryVersion}:${version}`;
   return internalSdkVersion;
 }
 
+/** Get the internal SDK version type */
+export function getSdkVersionType(): string {
+  if (process.env[APPLICATION_INSIGHTS_SHIM_VERSION]) {
+    return `sha${process.env[APPLICATION_INSIGHTS_SHIM_VERSION]}`;
+  } else {
+    return `dst${AZURE_MONITOR_OPENTELEMETRY_VERSION}`;
+  }
+}
+
 // eslint-disable-next-line tsdoc/syntax
 /** Set the version prefix to a string in the format "{ResourceProvider}{OS}m_ */
 export function setSdkPrefix(): void {

sdk/monitor/monitor-opentelemetry/src/types.ts

@@ -149,6 +149,7 @@ export const AZURE_MONITOR_OPENTELEMETRY_VERSION = "1.9.0";
 export const AZURE_MONITOR_STATSBEAT_FEATURES = "AZURE_MONITOR_STATSBEAT_FEATURES";
 export const AZURE_MONITOR_PREFIX = "AZURE_MONITOR_PREFIX";
 export const AZURE_MONITOR_AUTO_ATTACH = "AZURE_MONITOR_AUTO_ATTACH";
+export const APPLICATION_INSIGHTS_SHIM_VERSION = "APPLICATION_INSIGHTS_SHIM_VERSION";
 
 export enum AttachTypePrefix {
   INTEGRATED_AUTO = "i",