@opentelemetry/instrumentation-winston

OpenTelemetry instrumentation for winston

This module provides automatic instrumentation for injection of trace context to winston.

Installation

npm install --save @opentelemetry/instrumentation-winston

Usage

const { NodeTracerProvider } = require('@opentelemetry/node');
const { WinstonInstrumentation } = require('@opentelemetry/instrumentation-winston');
const { registerInstrumentations } = require('@opentelemetry/instrumentation');

const provider = new NodeTracerProvider();
provider.register();

registerInstrumentations({
  instrumentations: [
    new WinstonInstrumentation({
      // Optional hook to insert additional context to log metadata.
      // Called after trace context is injected to metadata.
      logHook: (record, span) => {
        record['resource.service.name'] = provider.resource.attributes['service.name'];
      },
    }),
    // other instrumentations
  ],
});

const winston = require('winston');
const logger = winston.createLogger({
  transports: [new winston.transports.Console()],
})
logger.info('foobar');
// {"message":"foobar","trace_id":"e21c7a95fff34e04f77c7bd518779621","span_id":"b7589a981fde09f4","trace_flags":"01", ...}

Fields added to Winston metadata

For the current active span, the following fields are injected:

• trace_id
• span_id
• trace_flags

When no span context is active or the span context is invalid, injection is skipped.

Supported versions

1.x, 2.x, 3.x

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.