@opentelemetry/tracing

OpenTelemetry Tracing

tracing contains the foundation for all tracing SDKs of opentelemetry-js.

Used standalone, this module provides methods for manual instrumentation of code, offering full control over span creation for client-side JavaScript (browser) and Node.js.

It does not provide automated instrumentation of known libraries, context propagation for asynchronous invocations or distributed-context out-of-the-box.

For automated instrumentation for Node.js, please see @opentelemetry/node.

Installation

npm install --save @opentelemetry/core
npm install --save @opentelemetry/tracing

Usage

const opentelemetry = require('@opentelemetry/core');
const { BasicTracer } = require('@opentelemetry/tracing');

// To start a trace, you first need to initialize the Tracer.
// NOTE: the default OpenTelemetry tracer does not record any tracing information.
const tracer = new BasicTracer();

// Initialize the OpenTelemetry APIs to use the BasicTracer bindings
opentelemetry.initGlobalTracer(tracer);

// To create a span in a trace, we used the global singleton tracer to start a new span.
const span = opentelemetry.getTracer().startSpan('foo');

// Create an Attributes
span.setAttribute('key', 'value');

// We must end the spans so they becomes available for exporting.
span.end();

Example

See examples/basic-tracer-node for an end-to-end example, including exporting created spans.

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 on gitter

License

Apache 2.0 - See LICENSE for more information.