docs(instrumentation-fastify): deprecate instrumentation in favor of @fastify/otel (#2651)

Co-authored-by: Trent Mick <[email protected]>

Author: pichlermarc

plugins/node/opentelemetry-instrumentation-fastify/README.md

@@ -3,9 +3,13 @@
 [![NPM Published Version][npm-img]][npm-url]
 [![Apache License][license-image]][license-image]
 
-This module provides automatic instrumentation for the [`fastify`](https://www.fastify.io/) module, which may be loaded using the [`@opentelemetry/sdk-trace-node`](https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-sdk-trace-node) package and is included in the [`@opentelemetry/auto-instrumentations-node`](https://www.npmjs.com/package/@opentelemetry/auto-instrumentations-node) bundle.
+> [!IMPORTANT]
+> This component is **deprecated** in favor of the official instrumentation package [`@fastify/otel`](https://www.npmjs.com/package/@fastify/otel), maintained by the Fastify authors.
+> Please see [here](https://github.com/fastify/otel?tab=readme-ov-file#usage) for instructions on how to use `@fastify/otel`.
+>
+> We will stop publishing new versions of `@opentelemetry/instrumentation-fastify` on June 30, 2025.
 
-If total installation size is not constrained, it is recommended to use the [`@opentelemetry/auto-instrumentations-node`](https://www.npmjs.com/package/@opentelemetry/auto-instrumentations-node) bundle with [@opentelemetry/sdk-node](`https://www.npmjs.com/package/@opentelemetry/sdk-node`) for the most seamless instrumentation experience.
+This module provides automatic instrumentation for the [`fastify`](https://www.fastify.dev/) module, which may be loaded using the [`@opentelemetry/sdk-trace-node`](https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-sdk-trace-node) package.
 
 Compatible with OpenTelemetry JS API and SDK `1.0+`.
 

plugins/node/opentelemetry-instrumentation-fastify/src/instrumentation.ts

@@ -47,7 +47,11 @@ import { PACKAGE_NAME, PACKAGE_VERSION } from './version';
 
 export const ANONYMOUS_NAME = 'anonymous';
 
-/** Fastify instrumentation for OpenTelemetry */
+/**
+ * Fastify instrumentation for OpenTelemetry
+ * @deprecated This instrumentation is deprecated in favor of the official instrumentation package `@fastify/otel`,
+ *             which is maintained by the fastify authors.
+ */
 export class FastifyInstrumentation extends InstrumentationBase<FastifyInstrumentationConfig> {
   constructor(config: FastifyInstrumentationConfig = {}) {
     super(PACKAGE_NAME, PACKAGE_VERSION, config);

scripts/lint-readme.js

@@ -7,6 +7,9 @@ const monorepoRoot = path.resolve(__dirname, '..');
 const autoInstrumentationNodeDeps = require(`${monorepoRoot}/metapackages/auto-instrumentations-node/package.json`).dependencies;
 const autoInstrumentationWebDeps = require(`${monorepoRoot}/metapackages/auto-instrumentations-web/package.json`).dependencies;
 
+// remove exempt instrumentations
+delete autoInstrumentationNodeDeps['@opentelemetry/instrumentation-fastify'];
+
 // extract info from package.json
 const packageJsonUrl = path.resolve(`${packageRoot}/package.json`);
 const pjson = require(packageJsonUrl);
@@ -74,7 +77,7 @@ Compatible with OpenTelemetry JS API and SDK \`1.0+\`.
   const distText = `If total installation size is not constrained, it is recommended to use the [\`@opentelemetry/auto-instrumentations-web\`](https://www.npmjs.com/package/@opentelemetry/auto-instrumentations-web) bundle with [\`@opentelemetry/sdk-trace-web\`](https://www.npmjs.com/package/@opentelemetry/sdk-trace-web) for the most seamless instrumentation experience.
 
 Compatible with OpenTelemetry JS API and SDK \`1.0+\`.
-`;  
+`;
 
   if (!currentReadmeContent.includes(distText)) {
     throw new Error(