lib/metrics/platforms/generic/index.js

/*
 * Copyright Elasticsearch B.V. and other contributors where applicable.
 * Licensed under the BSD 2-Clause License; you may not use this file except in
 * compliance with the BSD 2-Clause License.
 */

'use strict';

const os = require('os');

const Stats = require('./stats');

module.exports = function createSystemMetrics(registry) {
  // Base system metrics
  registry.getOrCreateGauge(
    'system.cpu.total.norm.pct',
    require('./system-cpu'),
  );
  registry.getOrCreateGauge('system.memory.total', () => os.totalmem());
  registry.getOrCreateGauge('system.memory.actual.free', () => os.freemem());

  // Process metrics
  const stats = new Stats();
  registry.registerCollector(stats);

  const metrics = [
    'system.process.cpu.total.norm.pct',
    'system.process.cpu.system.norm.pct',
    'system.process.cpu.user.norm.pct',
  ];

  for (const metric of metrics) {
    registry.getOrCreateGauge(metric, () => stats.toJSON()[metric]);
  }

  registry.getOrCreateGauge(
    'system.process.memory.rss.bytes',
    () => process.memoryUsage().rss,
  );
};