89 lines
2.5 KiB
JavaScript
Executable File
89 lines
2.5 KiB
JavaScript
Executable File
'use strict';
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const OtelApi = require('@opentelemetry/api');
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const Counter = require('../counter');
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const PROCESS_CPU_USER_SECONDS = 'process_cpu_user_seconds_total';
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const PROCESS_CPU_SYSTEM_SECONDS = 'process_cpu_system_seconds_total';
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const PROCESS_CPU_SECONDS = 'process_cpu_seconds_total';
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module.exports = (registry, config = {}) => {
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const registers = registry ? [registry] : undefined;
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const namePrefix = config.prefix ? config.prefix : '';
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const labels = config.labels ? config.labels : {};
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const exemplars = config.enableExemplars ? config.enableExemplars : false;
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const labelNames = Object.keys(labels);
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let lastCpuUsage = process.cpuUsage();
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const cpuUserUsageCounter = new Counter({
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name: namePrefix + PROCESS_CPU_USER_SECONDS,
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help: 'Total user CPU time spent in seconds.',
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enableExemplars: exemplars,
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registers,
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labelNames,
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// Use this one metric's `collect` to set all metrics' values.
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collect() {
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const cpuUsage = process.cpuUsage();
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const userUsageMicros = cpuUsage.user - lastCpuUsage.user;
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const systemUsageMicros = cpuUsage.system - lastCpuUsage.system;
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lastCpuUsage = cpuUsage;
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if (this.enableExemplars) {
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let exemplarLabels = {};
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const currentSpan = OtelApi.trace.getSpan(OtelApi.context.active());
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if (currentSpan) {
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exemplarLabels = {
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traceId: currentSpan.spanContext().traceId,
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spanId: currentSpan.spanContext().spanId,
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};
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}
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cpuUserUsageCounter.inc({
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labels,
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value: userUsageMicros / 1e6,
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exemplarLabels,
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});
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cpuSystemUsageCounter.inc({
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labels,
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value: systemUsageMicros / 1e6,
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exemplarLabels,
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});
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cpuUsageCounter.inc({
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labels,
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value: (userUsageMicros + systemUsageMicros) / 1e6,
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exemplarLabels,
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});
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} else {
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cpuUserUsageCounter.inc(labels, userUsageMicros / 1e6);
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cpuSystemUsageCounter.inc(labels, systemUsageMicros / 1e6);
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cpuUsageCounter.inc(
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labels,
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(userUsageMicros + systemUsageMicros) / 1e6,
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);
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}
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},
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});
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const cpuSystemUsageCounter = new Counter({
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name: namePrefix + PROCESS_CPU_SYSTEM_SECONDS,
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help: 'Total system CPU time spent in seconds.',
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enableExemplars: exemplars,
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registers,
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labelNames,
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});
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const cpuUsageCounter = new Counter({
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name: namePrefix + PROCESS_CPU_SECONDS,
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help: 'Total user and system CPU time spent in seconds.',
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enableExemplars: exemplars,
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registers,
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labelNames,
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});
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};
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module.exports.metricNames = [
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PROCESS_CPU_USER_SECONDS,
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PROCESS_CPU_SYSTEM_SECONDS,
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PROCESS_CPU_SECONDS,
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];
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