docs(auto-instrumentations-node): improved readme (open-telemetry#563)

Author: CptSchnitz

metapackages/auto-instrumentations-node/README.md

@@ -5,35 +5,43 @@
 [![devDependencies][devDependencies-image]][devDependencies-url]
 [![Apache License][license-image]][license-url]
 
+This module provides a simple way to initialize multiple Node instrumentations.
+
 ## Installation
 
 ```bash
 npm install --save @opentelemetry/auto-instrumentations-node
 ```
 
 ## Usage
+OpenTelemetry Meta Packages for Node automatically loads instrumentations for Node builtin modules and common packages.
+
+Custom configuration for each of the instrumentations can be passed to the function, by providing an object with the name of the instrumentation as a key, and its configuration as the value.
 
 ```javascript
 const { NodeTracerProvider } = require('@opentelemetry/node');
 const { getNodeAutoInstrumentations } = require('@opentelemetry/auto-instrumentations-node');
 const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector');
+const { Resource } = require('@opentelemetry/resources');
+const { ResourceAttributes } = require('@opentelemetry/semantic-conventions');
 const { SimpleSpanProcessor } = require('@opentelemetry/tracing');
 const { registerInstrumentations } = require('@opentelemetry/instrumentation');
 
-const exporter = new CollectorTraceExporter({
-  serviceName: 'auto-instrumentations-node',
+const exporter = new CollectorTraceExporter();
+const provider = new NodeTracerProvider({
+  resource: new Resource({
+    [ResourceAttributes.SERVICE_NAME]: 'basic-service',
+  }),
 });
-
-const provider = new NodeTracerProvider();
 provider.addSpanProcessor(new SimpleSpanProcessor(exporter));
 provider.register();
 
 registerInstrumentations({
   instrumentations: [
     getNodeAutoInstrumentations({
       // load custom configuration for http instrumentation
-      "@opentelemetry/instrumentation-http": {
-        applyCustomAttributesOnSpan: (span)=> {
+      '@opentelemetry/instrumentation-http': {
+        applyCustomAttributesOnSpan: (span) => {
           span.setAttribute('foo2', 'bar2');
         },
       },
@@ -42,6 +50,19 @@ registerInstrumentations({
 });
 
 ```
+## Supported instrumentations
+
+- [@opentelemetry/instrumentation-dns](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-dns)
+- [@opentelemetry/instrumentation-http](https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-instrumentation-http)
+- [@opentelemetry/instrumentation-grpc](https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-instrumentation-grpc)
+- [@opentelemetry/instrumentation-express](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-express)
+- [@opentelemetry/instrumentation-koa](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-koa)
+- [@opentelemetry/instrumentation-graphql](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-graphql)
+- [@opentelemetry/instrumentation-ioredis](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-ioredis)
+- [@opentelemetry/instrumentation-redis](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-redis)
+- [@opentelemetry/instrumentation-pg](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-pg)
+- [@opentelemetry/instrumentation-mongodb](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-mongodb)
+- [@opentelemetry/instrumentation-mysql](https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-mysql)
 
 ## Useful links