121 lines
2.8 KiB
JavaScript
121 lines
2.8 KiB
JavaScript
const async = require('async');
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const disk = require('diskusage');
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const os = require('os');
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const cdm = {};
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const osutils = require('os-utils');
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const statistics = require('simple-statistics');
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const getCPU = (fn) => {
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return fn(null, {
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user: os.cpus().reduce((sum, cpu) => sum + cpu.times.user, 0),
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sys: os.cpus().reduce((sum, cpu) => sum + cpu.times.sys, 0)
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});
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};
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const getPerc = (fn) => {
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async.timesSeries(5, (n, next) => {
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osutils.cpuUsage((p) => {
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const percentage = p * 100;
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next(null, percentage);
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});
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}, (err, sample) => {
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fn(err, {
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perc: {
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firstQuartile: statistics.quantile(sample, 0.25),
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median: statistics.median(sample),
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thirdQuartile: statistics.quantile(sample, 0.75),
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max: statistics.max(sample),
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min: statistics.min(sample),
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stddev: statistics.sampleStandardDeviation(sample)
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}
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});
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});
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};
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const getMem = (fn) => {
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async.timesSeries(10, (n, next) => {
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const free = os.freemem();
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const total = os.totalmem();
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const using = total - free;
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const perc = (using / total) * 100;
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setTimeout(() => {
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next(null, perc);
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}, 500);
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}, (err, sample) => {
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fn(err, {
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perc: {
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firstQuartile: statistics.quantile(sample, 0.25),
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median: statistics.median(sample),
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thirdQuartile: statistics.quantile(sample, 0.75),
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max: statistics.max(sample),
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min: statistics.min(sample),
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stddev: statistics.sampleStandardDeviation(sample)
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}
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});
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});
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};
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const getDisk = (fn) => {
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async.timesSeries(5, (n, next) => {
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disk.check('/', (err, data) => {
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setTimeout(() => {
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const perc = (data.available / data.total) * 100;
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next(err, perc);
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}, 2000);
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});
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}, (err, sample) => {
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fn(err, {
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perc: {
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firstQuartile: statistics.quantile(sample, 0.25),
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median: statistics.median(sample),
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thirdQuartile: statistics.quantile(sample, 0.75),
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max: statistics.max(sample),
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min: statistics.min(sample),
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stddev: statistics.sampleStandardDeviation(sample)
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}
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});
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});
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};
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const getStats = (fn) => {
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async.parallel({
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cpu: getPerc,
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mem: getMem,
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disk: getDisk
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}, fn);
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};
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module.exports = (server) => ({
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on: (id) => {
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console.log('on', cdm[id]);
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if (cdm[id] && (cdm[id].sockets > 0)) {
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cdm[id].sockets += 1;
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return;
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}
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let messageId = 0;
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const interval = setInterval(() => {
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console.log(`publishing /stats/${id}`);
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getStats((err, stats) => {
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server.publish(`/stats/${id}`, {
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when: new Date().getTime(),
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stats
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});
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});
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}, 1000);
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cdm[id] = {
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interval,
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sockets: 1
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};
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},
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off: (id) => {
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if (!(cdm[id].sockets -= 1)) {
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clearInterval(cdm[id].interval);
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}
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}
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});
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