@opentelemetry/instrumentation-http v0.54.0

OpenTelemetry HTTP and HTTPS Instrumentation for Node.js

Note: This is an experimental package under active development. New releases may include breaking changes.

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

Supported Versions

• Nodejs >=14

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,
  NodeTracerProvider,
  SimpleSpanProcessor,
} = 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:

Semantic Conventions

Prior to version 0.54, this instrumentation created spans targeting an experimental semantic convention Version 1.7.0.

This package is capable of emitting both Semantic Convention Version 1.7.0 and Version 1.27.0. It is controlled using the environment variable OTEL_SEMCONV_STABILITY_OPT_IN, which is a comma separated list of values. The values http and http/dup control this instrumentation. See details for the behavior of each of these values below. If neither http or http/dup is included in OTEL_SEMCONV_STABILITY_OPT_IN, the old experimental semantic conventions will be used by default.

Stable Semantic Conventions 1.27

Enabled when OTEL_SEMCONV_STABILITY_OPT_IN contains http OR http/dup. This is the recommended configuration, and will soon become the default behavior.

Follow all requirements and recommendations of HTTP Client and Server Semantic Conventions Version 1.27.0 for spans and metrics, including all required and recommended attributes.

Metrics Exported:

• http.server.request.duration
• http.client.request.duration

Upgrading Semantic Conventions

When upgrading to the new semantic conventions, it is recommended to do so in the following order:

1. Upgrade @opentelemetry/instrumentation-http to the latest version
2. Set OTEL_SEMCONV_STABILITY_OPT_IN=http/dup to emit both old and new semantic conventions
3. Modify alerts, dashboards, metrics, and other processes to expect the new semantic conventions
4. Set OTEL_SEMCONV_STABILITY_OPT_IN=http to emit only the new semantic conventions

This will cause both the old and new semantic conventions to be emitted during the transition period.

Legacy Behavior (default)

Enabled when OTEL_SEMCONV_STABILITY_OPT_IN contains http/dup or DOES NOT CONTAIN http. This is the current default behavior.

Create HTTP client spans which implement Semantic Convention Version 1.7.0.

Server Spans (legacy)

When OTEL_SEMCONV_STABILITY_OPT_IN is not set or includes http/dup, this module implements Semantic Convention Version 1.7.0.

Attributes collected:

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.