46 lines
1.0 KiB
JavaScript
46 lines
1.0 KiB
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_MAX_FDS = 'process_max_fds';
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let maxFds;
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module.exports = (registry, config = {}) => {
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if (maxFds === undefined) {
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// This will fail if a linux-like procfs is not available.
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try {
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const limits = fs.readFileSync('/proc/self/limits', 'utf8');
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const lines = limits.split('\n');
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for (const line of lines) {
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if (line.startsWith('Max open files')) {
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const parts = line.split(/ +/);
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maxFds = Number(parts[1]);
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break;
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}
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}
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} catch {
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return;
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}
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}
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if (maxFds === undefined) return;
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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_MAX_FDS,
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help: 'Maximum 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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if (maxFds !== undefined) this.set(labels, maxFds);
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},
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});
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};
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module.exports.metricNames = [PROCESS_MAX_FDS];
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