tracing.js

const { resourceFromAttributes } = require('@opentelemetry/resources');
const { ATTR_SERVICE_NAME } = require('@opentelemetry/semantic-conventions');
const { NodeSDK } = require('@opentelemetry/sdk-node');
const { getNodeAutoInstrumentations } = require('@opentelemetry/auto-instrumentations-node');
const { OTLPTraceExporter } = require('@opentelemetry/exporter-trace-otlp-http');
const {
  ConsoleMetricExporter,
  PeriodicExportingMetricReader,
} = require('@opentelemetry/sdk-metrics');
const { ExpressInstrumentation } = require("opentelemetry-instrumentation-express");
const { MongoDBInstrumentation } = require("@opentelemetry/instrumentation-mongodb");
const { HttpInstrumentation } = require("@opentelemetry/instrumentation-http");

const traceExporter = new OTLPTraceExporter();

const sdk = new NodeSDK({
  resource: resourceFromAttributes({
    [ATTR_SERVICE_NAME]: "todo-service"
  }),
  traceExporter,
  metricReader: new PeriodicExportingMetricReader({
    exporter: new ConsoleMetricExporter(),
  }),
  instrumentations: [
    getNodeAutoInstrumentations(),
    new ExpressInstrumentation(),
    new MongoDBInstrumentation(),
    new HttpInstrumentation()
  ],
});

sdk.start();