otlp.js

const { NodeSDK } = require('@opentelemetry/sdk-node');
const { OTLPMetricExporter } = require('@opentelemetry/exporter-metrics-otlp-http');
const { PeriodicExportingMetricReader } = require('@opentelemetry/sdk-metrics');
const { getNodeAutoInstrumentations } = require('@opentelemetry/auto-instrumentations-node');
const otlpEndpoint = process.env.OTEL_EXPORTER_OTLP_ENDPOINT || 'http://otel-collector:4318';

const sdk = new NodeSDK({
  metricReader: new PeriodicExportingMetricReader({
    exporter: new OTLPMetricExporter({ url: `${otlpEndpoint}/v1/metrics` }),
    exportIntervalMillis: 5000,
  }),
  instrumentations: [
    getNodeAutoInstrumentations({
      '@opentelemetry/instrumentation-http': {
        'enabled': true,
        'enhancedMetrics': true,
        'tracing': false,
      },
    }),
  ],
});

sdk.start();
console.log('OpenTelemetry initialized ✅');