dg-npm-templates/templates/dg-nodejs-backend-app/src/metrics.js

Npx generator for react app dependency creation by digite

const Prometheus = require("prom-client");

const setupMetrics = app => {
  const register = new Prometheus.Registry();

  register.setDefaultLabels({
    app: process.env.APP_NAME
  });

  Prometheus.collectDefaultMetrics({ register });

  app.get(`/${process.env.CONTEXT_PATH}/metrics`, (req, res) => {
    res.set("Content-Type", Prometheus.register.contentType);

    register.metrics().then((result) => {
      res.send(result);
    });
  });
};

module.exports = {
  setupMetrics
};