37 lines
858 B
JavaScript
37 lines
858 B
JavaScript
'use strict';
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const Gauge = require('../gauge');
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const fs = require('fs');
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const process = require('process');
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const PROCESS_OPEN_FDS = 'process_open_fds';
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module.exports = (registry, config = {}) => {
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if (process.platform !== 'linux') {
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return;
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}
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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 labelNames = Object.keys(labels);
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new Gauge({
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name: namePrefix + PROCESS_OPEN_FDS,
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help: 'Number of open file descriptors.',
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registers: registry ? [registry] : undefined,
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labelNames,
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collect() {
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try {
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const fds = fs.readdirSync('/proc/self/fd');
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// Minus 1 to not count the fd that was used by readdirSync(),
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// it's now closed.
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this.set(labels, fds.length - 1);
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} catch {
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// noop
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}
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},
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});
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};
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module.exports.metricNames = [PROCESS_OPEN_FDS];
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