482 lines
20 KiB
JavaScript
482 lines
20 KiB
JavaScript
'use strict';
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exports = module.exports = {
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getSystem,
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getSystemStream,
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getContainer,
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getContainerStream,
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sendToGraphite
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};
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const apps = require('./apps.js'),
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assert = require('assert'),
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BoxError = require('./boxerror.js'),
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constants = require('./constants.js'),
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debug = require('debug')('box:metrics'),
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docker = require('./docker.js'),
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fs = require('fs'),
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net = require('net'),
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os = require('os'),
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path = require('path'),
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{ Readable } = require('stream'),
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safe = require('safetydance'),
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services = require('./services.js'),
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superagent = require('./superagent.js');
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function translateContainerStatsSync(stats) {
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assert.strictEqual(typeof stats, 'object');
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// the container is missing or stopped. better not to inspect and check State since a race is possible
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if (Object.keys(stats.pids_stats) === 0 || Object.keys(stats.memory_stats).length === 0 || stats.blkio_stats.io_service_bytes_recursive === null) return null;
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const networkRead = stats.networks ? stats.networks.eth0.rx_bytes : 0; // in host mode (turn), networks is missing
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const networkWrite = stats.networks ? stats.networks.eth0.tx_bytes : 0; // in host mode (turn), networks is missing
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const memoryUsed = stats.memory_stats.usage;
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const memoryMax = stats.memory_stats.limit;
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const blkioStats = stats.blkio_stats.io_service_bytes_recursive;
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const blockRead = blkioStats.filter(entry => entry.op === 'read').reduce((sum, entry) => sum + entry.value, 0);
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const blockWrite = blkioStats.filter(entry => entry.op === 'write').reduce((sum, entry) => sum + entry.value, 0);
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const cpuUsageMsecs = stats.cpu_stats.cpu_usage.total_usage / 1e6; // convert from nano to msecs (to match system metrics)
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const systemUsageMsecs = stats.cpu_stats.system_cpu_usage / 1e6;
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const pidCount = stats.pids_stats.current;
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return { ts: new Date(stats.read), pidCount, networkRead, networkWrite, blockRead, blockWrite, memoryUsed, memoryMax, cpuUsageMsecs, systemUsageMsecs };
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}
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async function readContainerMetrics() {
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const allAddons = [ 'turn', 'mail', 'mongodb', 'mysql', 'postgresql' ];
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const containerNames = allAddons;
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for (const app of await apps.list()) {
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if (app.containerId) containerNames.push(app.id); // containerId can be null if app is installing. metrics must be stored by appId since container id changes over time
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if (app.manifest.addons?.redis && app.enableRedis) containerNames.push(`redis-${app.id}`);
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}
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const metrics = {};
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for (const containerName of containerNames) {
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const [error, stats] = await safe(docker.getStats(containerName, { stream: false }));
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if (error) continue;
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const translated = translateContainerStatsSync(stats);
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if (translated) metrics[containerName] = translated;
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}
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return metrics;
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}
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async function readMemoryMetrics() {
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const output = await fs.promises.readFile('/proc/meminfo', { encoding: 'utf8' });
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const totalMemoryMatch = output.match(/^MemTotal:\s+(\d+)/m);
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const freeMemoryMatch = output.match(/^MemFree:\s+(\d+)/m);
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const buffersMatch = output.match(/^Buffers:\s+(\d+)/m);
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const cachedMatch = output.match(/^Cached:\s+(\d+)/m);
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if (!totalMemoryMatch || !freeMemoryMatch || !buffersMatch || !cachedMatch) throw new BoxError(BoxError.EXTERNAL_ERROR, 'Could not find memory used');
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const memoryUsed = parseInt(totalMemoryMatch[1]) * 1024 - parseInt(freeMemoryMatch[1]) * 1024 - parseInt(buffersMatch[1]) * 1024 - parseInt(cachedMatch[1]) * 1024;
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const swapTotalMatch = output.match(/^SwapTotal:\s+(\d+)/m);
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const swapFreeMatch = output.match(/^SwapFree:\s+(\d+)/m);
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if (!swapTotalMatch || !swapFreeMatch) throw new BoxError(BoxError.EXTERNAL_ERROR, 'Could not find swap used');
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const swapUsed = parseInt(swapTotalMatch[1]) * 1024 - parseInt(swapFreeMatch[1]) * 1024;
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return {
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memoryUsed,
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swapUsed
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};
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}
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async function readCpuMetrics() {
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const cpus = os.cpus();
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const userMsecs = cpus.map(c => c.times.user).reduce((p, c) => p+c);
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const sysMsecs = cpus.map(c => c.times.sys).reduce((p, c) => p+c);
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return { userMsecs, sysMsecs }; // these values are the times spent since system start
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}
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async function readDiskMetrics() {
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const mounts = await fs.promises.readFile('/proc/mounts', { encoding: 'utf8' });
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const rootLine = mounts.split('\n').find(line => line.split(' ')[1] === '/');
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if (!rootLine) throw new BoxError(BoxError.EXTERNAL_ERROR, 'Root mount not found');
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const devicePath = rootLine.split(' ')[0]; // e.g., "/dev/sda1"
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const base = path.basename(devicePath); // remove /dev/
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const match = base.match(/^(.*?)(p?[0-9]+)?$/);
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const blockDevice = match ? match[1] : base;
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if (!blockDevice) throw new BoxError(BoxError.EXTERNAL_ERROR, 'Could not find root block device name');
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const diskstats = await fs.promises.readFile('/proc/diskstats', { encoding: 'utf8' });
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const statsLine = diskstats.split('\n').find(l => l.includes(` ${blockDevice} `));
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if (!blockDevice) throw new BoxError(BoxError.EXTERNAL_ERROR, 'Could not get disk stats');
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const parts = statsLine.trim().split(/\s+/);
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const sectorsRead = parseInt(parts[5], 10); // field 6 . one sectiro is 512 bytes
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const sectorsWrite = parseInt(parts[9], 10); // field 10
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const blockRead = sectorsRead * 512;
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const blockWrite = sectorsWrite * 512;
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return { blockRead, blockWrite };
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}
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async function readNetworkMetrics() {
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const contents = await fs.promises.readFile('/proc/net/route', { encoding: 'utf8' });
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const lines = contents.trim().split('\n').slice(1); // skip header
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let defaultIface = null;
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for (const line of lines) {
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const [iface, destination] = line.split(/\s+/);
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if (destination === '00000000') {
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defaultIface = iface; // default route
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break;
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}
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}
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if (!defaultIface) throw new BoxError(BoxError.EXTERNAL_ERROR, 'Could not detect default interface');
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const [rx, tx] = await Promise.all([
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fs.promises.readFile(`/sys/class/net/${defaultIface}/statistics/rx_bytes`, { encoding: 'utf8' }),
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fs.promises.readFile(`/sys/class/net/${defaultIface}/statistics/tx_bytes`, { encoding: 'utf8' })
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]);
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return {
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networkRead: parseInt(rx.trim(), 10),
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networkWrite: parseInt(tx.trim(), 10)
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};
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}
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async function readSystemMetrics() {
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const memoryMetrics = await readMemoryMetrics();
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const cpuMetrics = await readCpuMetrics();
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const diskMetrics = await readDiskMetrics();
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const networkMetrics = await readNetworkMetrics();
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// { memoryUsed, swapUsed, userMsecs, sysMsecs, blockRead, blockWrite, networkRead, networkWrite }
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return { ...memoryMetrics, ...cpuMetrics, ...diskMetrics, ...networkMetrics };
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}
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async function sendToGraphite() {
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// debug('sendStatsToGraphite: collecting stats');
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const result = await readSystemMetrics();
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const graphiteMetrics = [
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{ path: `cloudron.system.memory-used`, value: result.memoryUsed },
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{ path: `cloudron.system.swap-used`, value: result.swapUsed },
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{ path: `cloudron.system.cpu-user`, value: result.userMsecs },
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{ path: `cloudron.system.cpu-sys`, value: result.sysMsecs },
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{ path: `cloudron.system.blockio-read`, value: result.blockRead },
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{ path: `cloudron.system.blockio-write`, value: result.blockWrite },
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{ path: `cloudron.system.network-read`, value: result.networkRead },
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{ path: `cloudron.system.network-write`, value: result.networkWrite }
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];
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const dockerMetrics = await readContainerMetrics();
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for (const [name, value] of Object.entries(dockerMetrics)) {
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graphiteMetrics.push(
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{ path: `cloudron.container-${name}.network-read`, value: value.networkRead },
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{ path: `cloudron.container-${name}.network-write`, value: value.networkWrite },
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{ path: `cloudron.container-${name}.blockio-read`, value: value.blockRead },
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{ path: `cloudron.container-${name}.blockio-write`, value: value.blockWrite },
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{ path: `cloudron.container-${name}.memory-used`, value: value.memoryUsed },
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{ path: `cloudron.container-${name}.memory-max`, value: value.memoryMax },
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{ path: `cloudron.container-${name}.cpu-usage`, value: value.cpuUsageMsecs },
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);
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}
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return new Promise((resolve) => {
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const client = new net.Socket();
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client.connect(constants.GRAPHITE_PORT, '127.0.0.1', () => {
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debug('connected to graphite');
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const now = Math.floor(Date.now() / 1000);
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for (const metric of graphiteMetrics) {
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client.write(`${metric.path} ${metric.value} ${now}\n`);
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}
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client.end();
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});
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client.on('error', (error) => {
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debug(error);
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resolve();
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});
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client.on('end', () => {
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debug('sent to graphite');
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resolve();
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});
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});
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}
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// for testing locally: curl 'http://${graphite-ip}:8000/graphite-web/render?format=json&from=-1min&target=absolute(collectd.localhost.du-docker.capacity-usage)'
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// the datapoint is (value, timestamp) https://graphite.readthedocs.io/en/latest/
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async function getGraphiteUrl() {
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const [error, result] = await safe(docker.inspect('graphite'));
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if (error && error.reason === BoxError.NOT_FOUND) return { status: exports.SERVICE_STATUS_STOPPED };
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if (error) throw error;
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const ip = safe.query(result, 'NetworkSettings.Networks.cloudron.IPAddress', null);
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if (!ip) throw new BoxError(BoxError.INACTIVE, 'Error getting IP of graphite service');
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return `http://${ip}:8000/graphite-web/render`;
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}
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async function getContainer(name, options) {
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assert.strictEqual(typeof name, 'string');
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assert.strictEqual(typeof options, 'object');
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const { fromSecs, intervalSecs, noNullPoints } = options;
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const graphiteUrl = await getGraphiteUrl();
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const targets = [
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// perSecond is nonNegativeDerivative over time . this value is the cpu usage in msecs .
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// (cpu usage msecs) / (cpus * 1000) is the percent but over all cpus. times 100 is the percent.
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// but the y-scale is cpus times 100. so, we only need to scale by 0.1
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`scale(perSecond(cloudron.container-${name}.cpu-usage),0.1)`,
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`summarize(cloudron.container-${name}.memory-used, "${intervalSecs}s", "avg")`,
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// get the rate in interval window
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`summarize(perSecond(cloudron.container-${name}.blockio-read), "${intervalSecs}s", "avg")`,
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`summarize(perSecond(cloudron.container-${name}.blockio-write), "${intervalSecs}s", "avg")`,
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`summarize(perSecond(cloudron.container-${name}.network-read), "${intervalSecs}s", "avg")`,
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`summarize(perSecond(cloudron.container-${name}.network-write), "${intervalSecs}s", "avg")`,
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// just get the max in interval window for absolute numbers
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`summarize(cloudron.container-${name}.blockio-read, "${intervalSecs}s", "max")`,
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`summarize(cloudron.container-${name}.blockio-write, "${intervalSecs}s", "max")`,
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`summarize(cloudron.container-${name}.network-read, "${intervalSecs}s", "max")`,
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`summarize(cloudron.container-${name}.network-write, "${intervalSecs}s", "max")`,
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];
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const results = [];
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for (const target of targets) {
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const query = {
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target: target,
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format: 'json',
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from: `-${fromSecs}s`,
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until: 'now',
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noNullPoints: !!noNullPoints
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};
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const [error, response] = await safe(superagent.get(graphiteUrl).query(query).timeout(30 * 1000).ok(() => true));
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if (error) throw new BoxError(BoxError.NETWORK_ERROR, error);
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if (response.status !== 200) throw new BoxError(BoxError.EXTERNAL_ERROR, `Unknown error with ${target}: ${response.status} ${response.text}`);
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results.push(response.body[0] && response.body[0].datapoints ? response.body[0].datapoints : []);
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}
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// results are datapoints[[value, ts], [value, ts], ...];
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return {
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cpu: results[0],
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memory: results[1],
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blockReadRate: results[2],
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blockWriteRate: results[3],
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networkReadRate: results[4],
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networkWriteRate: results[5],
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blockReadTotal: results[6][0] && results[6][0][0] ? results[6][0][0] : 0,
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blockWriteTotal: results[7][0] && results[7][0][0] ? results[7][0][0] : 0,
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networkReadTotal: results[8][0] && results[8][0][0] ? results[8][0][0] : 0,
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networkWriteTotal: results[9][0] && results[9][0][0] ? results[9][0][0] : 0,
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};
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}
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async function readSystemFromGraphite(options) {
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assert.strictEqual(typeof options, 'object');
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const { fromSecs, intervalSecs, noNullPoints } = options;
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const graphiteUrl = await getGraphiteUrl();
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// example: curl 'http://172.18.30.5:8000/graphite-web/render?target=cloudron.system.cpu-user&target=cloudron.system.cpu-sys&format=json&from=-1min&until=now&noNullPoints=false' | python3 -m json.tool
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const targets = [
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// perSecond is nonNegativeDerivative over time . this value is the cpu usage in msecs .
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// (cpu usage msecs) / (cpus * 1000) is the percent but over all cpus. times 100 is the percent.
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// but the y-scale is cpus times 100. so, we only need to scale by 0.1
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`scale(perSecond(sumSeries(cloudron.system.cpu-user,cloudron.system.cpu-sys)),0.1)`,
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`summarize(cloudron.system.memory-used, "${intervalSecs}s", "avg")`,
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`summarize(cloudron.system.swap-used, "${intervalSecs}s", "avg")`,
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// get the rate in interval window
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`summarize(perSecond(cloudron.system.blockio-read), "${intervalSecs}s", "avg")`,
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`summarize(perSecond(cloudron.system.blockio-write), "${intervalSecs}s", "avg")`,
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`summarize(perSecond(cloudron.system.network-read), "${intervalSecs}s", "avg")`,
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`summarize(perSecond(cloudron.system.network-write), "${intervalSecs}s", "avg")`,
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// just get the max in interval window for absolute numbers
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`summarize(cloudron.system.blockio-read, "${intervalSecs}s", "max")`,
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`summarize(cloudron.system.blockio-write, "${intervalSecs}s", "max")`,
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`summarize(cloudron.system.network-read, "${intervalSecs}s", "max")`,
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`summarize(cloudron.system.network-write, "${intervalSecs}s", "max")`,
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];
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const results = [];
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for (const target of targets) {
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const query = {
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target: target,
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format: 'json',
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from: `-${fromSecs}s`,
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until: 'now',
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noNullPoints: !!noNullPoints
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};
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const [error, response] = await safe(superagent.get(graphiteUrl).query(query).timeout(30 * 1000).ok(() => true));
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if (error) throw new BoxError(BoxError.NETWORK_ERROR, error);
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if (response.status !== 200) throw new BoxError(BoxError.EXTERNAL_ERROR, `Unknown error with ${target}: ${response.status} ${response.text}`);
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results.push(response.body[0] && response.body[0].datapoints ? response.body[0].datapoints : []);
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}
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return {
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cpu: results[0],
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memory: results[1],
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swap: results[2],
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blockReadRate: results[3],
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blockWriteRate: results[4],
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networkReadRate: results[5],
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networkWriteRate: results[6],
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blockReadTotal: results[7][0] && results[7][0][0] ? results[7][0][0] : 0,
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blockWriteTotal: results[8][0] && results[8][0][0] ? results[8][0][0] : 0,
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networkReadTotal: results[9][0] && results[9][0][0] ? results[9][0][0] : 0,
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networkWriteTotal: results[10][0] && results[10][0][0] ? results[10][0][0] : 0,
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};
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}
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// CPU: stress --cpu 2 --timeout 60
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// Memory: stress --vm 2 --vm-bytes 256M
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async function getSystem(options) {
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assert.strictEqual(typeof options, 'object');
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const systemStats = await readSystemFromGraphite(options);
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const appStats = {};
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for (const app of await apps.list()) {
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appStats[app.id] = await getContainer(app.id, options);
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}
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const serviceStats = {};
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for (const serviceId of await services.listServices()) {
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serviceStats[serviceId] = await getContainer(serviceId, options);
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}
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return {
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...systemStats, // { cpu, memory, swap, block{Read,Write}{Rate,Total}, network{Read,Write}{Rate,Total}
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apps: appStats,
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services: serviceStats,
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};
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}
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async function getSystemStream(options) {
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assert.strictEqual(typeof options, 'object');
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const intervalMsecs = options.intervalMsecs || 5000;
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let intervalId = null, oldMetrics = null;
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const metricsStream = new Readable({
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read(/*size*/) { /* ignored, we push via interval */ },
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destroy(error, callback) {
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clearInterval(intervalId);
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callback(error);
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}
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});
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intervalId = setInterval(async () => {
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const [error, metrics] = await safe(readSystemMetrics());
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if (error) return metricsStream.destroy(error);
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const cpuPercent = oldMetrics ? (metrics.userMsecs + metrics.sysMsecs - oldMetrics.userMsecs - oldMetrics.sysMsecs) * 100 / intervalMsecs : null;
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const blockReadRate = oldMetrics ? (metrics.blockRead - oldMetrics.blockRead) / (intervalMsecs/1000) : null;
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const blockWriteRate = oldMetrics ? (metrics.blockWrite - oldMetrics.blockWrite) / (intervalMsecs/1000) : null;
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const networkReadRate = oldMetrics ? (metrics.networkRead - oldMetrics.networkRead) / (intervalMsecs/1000) : null;
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const networkWriteRate = oldMetrics ? (metrics.networkWrite - oldMetrics.networkWrite) / (intervalMsecs/1000) : null;
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oldMetrics = metrics;
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const nowSecs = Date.now() / 1000; // to match graphite return value
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metricsStream.push(JSON.stringify({
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cpu: [ cpuPercent, nowSecs ],
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memory: [ metrics.memoryUsed, nowSecs ],
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swap: [ metrics.swapUsed, nowSecs ],
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blockReadRate: [ blockReadRate, nowSecs ],
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blockWriteRate: [ blockWriteRate, nowSecs ],
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blockReadTotal: metrics.blockRead,
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blockWriteTotal: metrics.blockWrite,
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networkReadRate: [ networkReadRate, nowSecs ],
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networkWriteRate: [ networkWriteRate, nowSecs ],
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networkReadTotal: metrics.networkRead,
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networkWriteTotal: metrics.networkWrite,
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}));
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}, intervalMsecs);
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return metricsStream;
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}
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async function getContainerStream(name, options) {
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assert.strictEqual(typeof name, 'string');
|
|
assert.strictEqual(typeof options, 'object');
|
|
|
|
let oldMetrics = null;
|
|
|
|
const metricsStream = new Readable({
|
|
read(/*size*/) { /* ignored, we push via interval */ },
|
|
destroy(error, callback) {
|
|
statsStream.destroy(); // double destroy is a no-op
|
|
callback(error);
|
|
}
|
|
});
|
|
|
|
const [error, statsStream] = await safe(docker.getStats(name, { stream: true }));
|
|
if (error) throw new Error(`Container stopped or missing: ${error.message}`);
|
|
|
|
statsStream.on('error', (error) => metricsStream.destroy(error)); // double destroy is a no-op
|
|
statsStream.on('data', (data) => {
|
|
const stats = JSON.parse(data.toString('utf8'));
|
|
const metrics = translateContainerStatsSync(stats);
|
|
if (!metrics) return; // maybe the container stopped
|
|
|
|
const { ts, networkRead, networkWrite, blockRead, blockWrite, memoryUsed, cpuUsageMsecs } = metrics;
|
|
|
|
const gap = oldMetrics ? (ts - oldMetrics.ts) : null;
|
|
|
|
const cpuPercent = oldMetrics ? (cpuUsageMsecs - oldMetrics.cpuUsageMsecs) * 100 / gap : null;
|
|
const blockReadRate = oldMetrics ? (blockRead - oldMetrics.blockRead) / (gap/1000) : null;
|
|
const blockWriteRate = oldMetrics ? (blockWrite - oldMetrics.blockWrite) / (gap/1000) : null;
|
|
const networkReadRate = oldMetrics ? (networkRead - oldMetrics.networkRead) / (gap/1000) : null;
|
|
const networkWriteRate = oldMetrics ? (networkWrite - oldMetrics.networkWrite) / (gap/1000) : null;
|
|
|
|
oldMetrics = metrics;
|
|
|
|
const nowSecs = ts.getTime() / 1000; // conver to secs to match graphite return value
|
|
metricsStream.push(JSON.stringify({
|
|
cpu: [ cpuPercent, nowSecs ],
|
|
memory: [ memoryUsed, nowSecs ],
|
|
|
|
blockReadRate: [ blockReadRate, nowSecs ],
|
|
blockWriteRate: [ blockWriteRate, nowSecs ],
|
|
blockReadTotal: metrics.blockRead,
|
|
blockWriteTotal: metrics.blockWrite,
|
|
|
|
networkReadRate: [ networkReadRate, nowSecs ],
|
|
networkWriteRate: [ networkWriteRate, nowSecs ],
|
|
networkReadTotal: metrics.networkRead,
|
|
networkWriteTotal: metrics.networkWrite,
|
|
}));
|
|
});
|
|
|
|
return metricsStream;
|
|
}
|