README

OpenTelemetry HTTP and HTTPS Instrumentation for Node.js

This module provides automatic instrumentation for http and https.

For automatic instrumentation see the @opentelemetry/sdk-trace-node package.

Installation

npm install --save @opentelemetry/instrumentation-http

Usage

OpenTelemetry HTTP Instrumentation allows the user to automatically collect trace data and export them to their backend of choice, to give observability to distributed systems.

To load a specific instrumentation (HTTP in this case), specify it in the Node Tracer's configuration.

const { HttpInstrumentation } = require('@opentelemetry/instrumentation-http');
const { ConsoleSpanExporter, SimpleSpanProcessor } = require('@opentelemetry/sdk-trace-base');
const { NodeTracerProvider } = require('@opentelemetry/sdk-trace-node');
const { registerInstrumentations } = require('@opentelemetry/instrumentation');

const provider = new NodeTracerProvider();

provider.addSpanProcessor(new SimpleSpanProcessor(new ConsoleSpanExporter()));
provider.register();

registerInstrumentations({
  instrumentations: [new HttpInstrumentation()],
});

See examples/http for a short example.

Http instrumentation Options

Http instrumentation has few options available to choose from. You can set the following:

Options	Type	Description
`applyCustomAttributesOnSpan`	`HttpCustomAttributeFunction`	Function for adding custom attributes
`requestHook`	`HttpRequestCustomAttributeFunction`	Function for adding custom attributes before request is handled
`responseHook`	`HttpResponseCustomAttributeFunction`	Function for adding custom attributes before response is handled
`startIncomingSpanHook`	`StartIncomingSpanCustomAttributeFunction`	Function for adding custom attributes before a span is started in incomingRequest
`startOutgoingSpanHook`	`StartOutgoingSpanCustomAttributeFunction`	Function for adding custom attributes before a span is started in outgoingRequest
`ignoreIncomingPaths`	`IgnoreMatcher[]`	Http instrumentation will not trace all incoming requests that match paths
`ignoreOutgoingUrls`	`IgnoreMatcher[]`	Http instrumentation will not trace all outgoing requests that match urls
`serverName`	`string`	The primary server name of the matched virtual host.
`requireParentforOutgoingSpans`	Boolean	Require that is a parent span to create new span for outgoing requests.
`requireParentforIncomingSpans`	Boolean	Require that is a parent span to create new span for incoming requests.
`headersToSpanAttributes`	`object`	List of case insensitive HTTP headers to convert to span attributes. Client (outgoing requests, incoming responses) and server (incoming requests, outgoing responses) headers will be converted to span attributes in the form of `http.{request\\|response}.header.header_name`, e.g. `http.response.header.content_length`

Useful links

For more information on OpenTelemetry, visit: https://opentelemetry.io/
For more about OpenTelemetry JavaScript: https://github.com/open-telemetry/opentelemetry-js
For help or feedback on this project, join us in GitHub Discussions

License

Apache 2.0 - See LICENSE for more information.

Usage no npm install needed!