trunk-server/backend/agents/honeycomb-tracing.js

// tracing.js
'use strict';

const { HoneycombSDK } = require('@honeycombio/opentelemetry-node');
const {
  getNodeAutoInstrumentations,
} = require('@opentelemetry/auto-instrumentations-node');

// uses the HONEYCOMB_API_KEY and OTEL_SERVICE_NAME environment variables
const sdk = new HoneycombSDK({
    sampleRate: 5,
    instrumentations: [
        getNodeAutoInstrumentations({
            // we recommend disabling fs autoinstrumentation since it can be noisy
            // and expensive during startup
            '@opentelemetry/instrumentation-fs': {
                enabled: false,
            },
        }),
    ],
});

sdk.start();