Reporting metrics via Node SDK?

[triblondon]

I have a working oTel tracing setup for a Node app which looks like this:

const oTelNode = new NodeSDK({
  resource: new Resource({
    [SemanticResourceAttributes.SERVICE_NAME]: 'Fiddle App'
  }),
  traceExporter: new OTLPTraceExporter({ url: process.env.OTEL_HTTP_COLLECTOR_URL }),
  metricExporter: /* TODO */,
  instrumentations: getNodeAutoInstrumentations()
});
oTelNode.start();

I noticed that the SDK has a metricExporter property on the SDK constructor. However, the example code to use OTel for metrics in NodeJS doesn't use the SDK at all:

const { MeterProvider, ConsoleMetricExporter } = require('@opentelemetry/sdk-metrics-base');

const meter = new MeterProvider({
  exporter: new ConsoleMetricExporter(),
  interval: 1000,
}).getMeter('your-meter-name');

const requestCount = meter.createCounter("requests", {
  description: "Count all incoming requests"
});

Instead (as shown above) the metrics exporter is given to the MeterProvider. What is the current best practice here, and what the most future compatible way of doing this?

([email protected], [email protected])

[vmarchaud]

We didn't document much of the metrics part for the node-sdk because it wasn't stable yet (and still isn't but we are near), If you really want to use them, i would advise to checkout what's missing from the RC release: https://github.com/open-telemetry/opentelemetry-js/projects/16?query=is%3Aopen+sort%3Aupdated-desc