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.gitignore
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| 1 | /node_modules/ | ||
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index.html
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| 1 | <!DOCTYPE html> | ||
| 2 | <html> | ||
| 3 | <head> | ||
| 4 | <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.2.1/Chart.bundle.min.js"></script> | ||
| 5 | <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.4.5/socket.io.min.js"></script> | ||
| 6 | </head> | ||
| 7 | <body> | ||
| 8 | <div style="width: 400px; margin: auto"> | ||
| 9 | <canvas id="myChart" width="400" height="200"></canvas> | ||
| 10 | </div> | ||
| 11 | <script> | ||
| 12 | var socket = io('http://localhost:41338'); | ||
| 13 | var labels = [0]; | ||
| 14 | var dataset = [{ | ||
| 15 | label: 'CPU Usage in %', | ||
| 16 | data: [0], | ||
| 17 | lineTension: 0, | ||
| 18 | pointRadius: 0 | ||
| 19 | }]; | ||
| 20 | |||
| 21 | var ctx = document.getElementById("myChart"); | ||
| 22 | var myChart = new Chart(ctx, { | ||
| 23 | type: 'line', | ||
| 24 | data: { | ||
| 25 | labels: labels, | ||
| 26 | datasets: dataset, | ||
| 27 | }, | ||
| 28 | options: { | ||
| 29 | scales: { | ||
| 30 | yAxes: [{ | ||
| 31 | ticks: { | ||
| 32 | beginAtZero: true | ||
| 33 | } | ||
| 34 | }], | ||
| 35 | }, | ||
| 36 | tooltips: { | ||
| 37 | enabled: false | ||
| 38 | } | ||
| 39 | } | ||
| 40 | }); | ||
| 41 | |||
| 42 | socket.on('stats', function (data) { | ||
| 43 | console.log(data); | ||
| 44 | labels = data.osStats.map((point) => point.timestamp); | ||
| 45 | dataset[0].data = data.osStats.map((point) => point.cpu); | ||
| 46 | |||
| 47 | myChart.data.datasets[0].data.push(data.osStats[data.osStats.length - 1].cpu); | ||
| 48 | myChart.data.labels.push(data.osStats[data.osStats.length - 1].timestamp); | ||
| 49 | myChart.update(); | ||
| 50 | }); | ||
| 51 | </script> | ||
| 52 | </body> | ||
| 53 | </html> | ||
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index.js
0 → 100644
| 1 | (function () { | ||
| 2 | 'use strict'; | ||
| 3 | |||
| 4 | const path = require('path'); | ||
| 5 | const onHeaders = require('on-headers'); | ||
| 6 | const pidusage = require('pidusage'); | ||
| 7 | const responseTimes = []; | ||
| 8 | const osStats = []; | ||
| 9 | |||
| 10 | const defaultConfig = { | ||
| 11 | socketPort: 41338, | ||
| 12 | path: '/status', | ||
| 13 | interval: 1, | ||
| 14 | retention: 30, | ||
| 15 | }; | ||
| 16 | |||
| 17 | const gatherOsMetrics = (io) => { | ||
| 18 | pidusage.stat(process.pid, (err, stat) => { | ||
| 19 | stat.timestamp = Date.now(); | ||
| 20 | osStats.push(stat); | ||
| 21 | sendMetrics(io); | ||
| 22 | }); | ||
| 23 | }; | ||
| 24 | |||
| 25 | const sendMetrics = (io) => { | ||
| 26 | osStats.slice(Math.max(osStats.length - defaultConfig.retention, 1)); | ||
| 27 | |||
| 28 | io.emit('stats', { | ||
| 29 | osStats: osStats.slice(Math.max(osStats.length - defaultConfig.retention, 1)), | ||
| 30 | responseTimes | ||
| 31 | }); | ||
| 32 | }; | ||
| 33 | |||
| 34 | const middlewareWrapper = (config) => { | ||
| 35 | if (config === null || config === {} || config === undefined) { | ||
| 36 | config = defaultConfig; | ||
| 37 | } | ||
| 38 | |||
| 39 | if (config.path === undefined || !config instanceof String) { | ||
| 40 | config.path = defaultConfig.path; | ||
| 41 | } | ||
| 42 | |||
| 43 | if (config.socketPort === undefined || !config instanceof Number) { | ||
| 44 | config.socketPort = defaultConfig.socketPort; | ||
| 45 | } | ||
| 46 | |||
| 47 | if (config.interval === undefined || !config instanceof Number) { | ||
| 48 | config.interval = defaultConfig.interval; | ||
| 49 | } | ||
| 50 | |||
| 51 | const io = require('socket.io')(config.socketPort); | ||
| 52 | |||
| 53 | setInterval(() => gatherOsMetrics(io), config.interval * 1000); | ||
| 54 | |||
| 55 | io.on('connection', (socket) => { | ||
| 56 | |||
| 57 | }); | ||
| 58 | |||
| 59 | return (req, res, next) => { | ||
| 60 | const startTime = process.hrtime(); | ||
| 61 | if (req.path === config.path) { | ||
| 62 | res.sendFile(path.join(__dirname + '/index.html')); | ||
| 63 | } else { | ||
| 64 | onHeaders(res, () => { | ||
| 65 | var diff = process.hrtime(startTime); | ||
| 66 | var responseTime = diff[0] * 1e3 + diff[1] * 1e-6; | ||
| 67 | |||
| 68 | responseTimes.push({ | ||
| 69 | endpoint: req.path, | ||
| 70 | responseTime, | ||
| 71 | timestamp: Date.now() | ||
| 72 | }); | ||
| 73 | |||
| 74 | }); | ||
| 75 | |||
| 76 | next(); | ||
| 77 | } | ||
| 78 | }; | ||
| 79 | }; | ||
| 80 | |||
| 81 | module.exports = middlewareWrapper; | ||
| 82 | |||
| 83 | }()); | ||
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package.json
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| 1 | { | ||
| 2 | "name": "node-monitor-status", | ||
| 3 | "version": "1.0.0", | ||
| 4 | "description": "Node Monitoring module.", | ||
| 5 | "main": "app.js", | ||
| 6 | "scripts": { | ||
| 7 | "test": "echo \"Error: no test specified\" && exit 1" | ||
| 8 | }, | ||
| 9 | "keywords": [ | ||
| 10 | "node", | ||
| 11 | "status", | ||
| 12 | "monitoring" | ||
| 13 | ], | ||
| 14 | "author": "Rafal Wilinski", | ||
| 15 | "license": "ISC", | ||
| 16 | "dependencies": { | ||
| 17 | "on-headers": "^1.0.1", | ||
| 18 | "pidusage": "^1.0.4", | ||
| 19 | "socket.io": "^1.4.8" | ||
| 20 | } | ||
| 21 | } |
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