Sami
f61e85d9a7
Full codebase including API server (32 modules + routes), dashboard frontend, DashCA certificate distribution, installer script, and deployment skills.
495 lines
14 KiB
JavaScript
495 lines
14 KiB
JavaScript
/**
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* Container Resource Monitoring Module
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* Tracks CPU, memory, disk, and network usage for Docker containers
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* Provides alerts and historical data
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*/
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const Docker = require('dockerode');
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const EventEmitter = require('events');
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const fs = require('fs');
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const path = require('path');
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const docker = new Docker();
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// Configuration
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const STATS_FILE = process.env.STATS_FILE || path.join(__dirname, 'container-stats.json');
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const ALERT_CONFIG_FILE = process.env.ALERT_CONFIG_FILE || path.join(__dirname, 'alert-config.json');
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const STATS_RETENTION_HOURS = parseInt(process.env.STATS_RETENTION_HOURS || '168', 10); // 7 days default
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const MONITORING_INTERVAL = parseInt(process.env.MONITORING_INTERVAL || '10000', 10); // 10 seconds
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class ResourceMonitor extends EventEmitter {
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constructor() {
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super();
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this.monitoring = false;
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this.monitoringInterval = null;
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this.stats = new Map(); // containerId -> array of stats
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this.alerts = new Map(); // containerId -> alert config
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this.lastAlerts = new Map(); // containerId -> last alert timestamp
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this.loadStats();
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this.loadAlertConfig();
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}
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/**
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* Start monitoring all containers
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*/
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start() {
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if (this.monitoring) {
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console.log('[ResourceMonitor] Already monitoring');
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return;
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}
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console.log('[ResourceMonitor] Starting container monitoring');
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this.monitoring = true;
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this.monitoringInterval = setInterval(() => this.collectStats(), MONITORING_INTERVAL);
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// Initial collection
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this.collectStats();
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}
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/**
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* Stop monitoring
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*/
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stop() {
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if (!this.monitoring) return;
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console.log('[ResourceMonitor] Stopping container monitoring');
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this.monitoring = false;
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if (this.monitoringInterval) {
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clearInterval(this.monitoringInterval);
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this.monitoringInterval = null;
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}
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this.saveStats();
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}
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/**
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* Collect stats from all running containers
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*/
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async collectStats() {
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try {
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const containers = await docker.listContainers({ all: false });
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for (const containerInfo of containers) {
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try {
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const container = docker.getContainer(containerInfo.Id);
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const stats = await this.getContainerStats(container);
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if (stats) {
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this.recordStats(containerInfo.Id, containerInfo.Names[0], stats);
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this.checkAlerts(containerInfo.Id, containerInfo.Names[0], stats);
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}
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} catch (error) {
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console.error(`[ResourceMonitor] Error collecting stats for ${containerInfo.Names[0]}:`, error.message);
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}
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}
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// Cleanup old stats
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this.cleanupOldStats();
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// Persist stats periodically
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if (Math.random() < 0.1) { // 10% chance to save (every ~100 seconds)
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this.saveStats();
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}
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} catch (error) {
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console.error('[ResourceMonitor] Error collecting container stats:', error.message);
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}
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}
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/**
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* Get stats for a single container
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*/
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async getContainerStats(container) {
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return new Promise((resolve, reject) => {
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container.stats({ stream: false }, (err, stats) => {
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if (err) {
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reject(err);
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return;
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}
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// Calculate CPU percentage
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const cpuDelta = stats.cpu_stats.cpu_usage.total_usage -
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(stats.precpu_stats.cpu_usage?.total_usage || 0);
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const systemDelta = stats.cpu_stats.system_cpu_usage -
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(stats.precpu_stats.system_cpu_usage || 0);
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const cpuPercent = systemDelta > 0 ? (cpuDelta / systemDelta) * 100 : 0;
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// Calculate memory usage
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const memoryUsage = stats.memory_stats.usage || 0;
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const memoryLimit = stats.memory_stats.limit || 0;
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const memoryPercent = memoryLimit > 0 ? (memoryUsage / memoryLimit) * 100 : 0;
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// Calculate network I/O
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let networkRx = 0;
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let networkTx = 0;
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if (stats.networks) {
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Object.values(stats.networks).forEach(net => {
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networkRx += net.rx_bytes || 0;
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networkTx += net.tx_bytes || 0;
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});
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}
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// Calculate block I/O
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let blockRead = 0;
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let blockWrite = 0;
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if (stats.blkio_stats?.io_service_bytes_recursive) {
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stats.blkio_stats.io_service_bytes_recursive.forEach(io => {
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if (io.op === 'Read') blockRead += io.value;
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if (io.op === 'Write') blockWrite += io.value;
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});
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}
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resolve({
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timestamp: new Date().toISOString(),
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cpu: {
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percent: Math.round(cpuPercent * 100) / 100,
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usage: stats.cpu_stats.cpu_usage.total_usage
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},
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memory: {
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usage: memoryUsage,
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limit: memoryLimit,
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percent: Math.round(memoryPercent * 100) / 100,
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usageMB: Math.round(memoryUsage / 1024 / 1024),
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limitMB: Math.round(memoryLimit / 1024 / 1024)
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},
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network: {
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rxBytes: networkRx,
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txBytes: networkTx,
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rxMB: Math.round(networkRx / 1024 / 1024 * 100) / 100,
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txMB: Math.round(networkTx / 1024 / 1024 * 100) / 100
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},
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disk: {
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readBytes: blockRead,
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writeBytes: blockWrite,
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readMB: Math.round(blockRead / 1024 / 1024 * 100) / 100,
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writeMB: Math.round(blockWrite / 1024 / 1024 * 100) / 100
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},
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pids: stats.pids_stats?.current || 0
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});
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});
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});
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}
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/**
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* Record stats for a container
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*/
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recordStats(containerId, containerName, stats) {
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if (!this.stats.has(containerId)) {
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this.stats.set(containerId, {
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name: containerName,
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history: []
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});
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}
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const containerStats = this.stats.get(containerId);
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containerStats.name = containerName; // Update name in case it changed
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containerStats.history.push(stats);
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// Keep only recent stats (based on retention policy)
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const cutoffTime = Date.now() - (STATS_RETENTION_HOURS * 60 * 60 * 1000);
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containerStats.history = containerStats.history.filter(s =>
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new Date(s.timestamp).getTime() > cutoffTime
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);
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}
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/**
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* Check if any alerts should be triggered
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*/
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checkAlerts(containerId, containerName, stats) {
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const alertConfig = this.alerts.get(containerId);
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if (!alertConfig || !alertConfig.enabled) return;
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const now = Date.now();
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const lastAlert = this.lastAlerts.get(containerId) || 0;
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const cooldown = (alertConfig.cooldownMinutes || 15) * 60 * 1000;
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// Don't spam alerts - respect cooldown period
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if (now - lastAlert < cooldown) return;
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const alerts = [];
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// Check CPU threshold
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if (alertConfig.cpuThreshold && stats.cpu.percent > alertConfig.cpuThreshold) {
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alerts.push({
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type: 'cpu',
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severity: 'warning',
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message: `CPU usage ${stats.cpu.percent.toFixed(1)}% exceeds threshold ${alertConfig.cpuThreshold}%`,
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value: stats.cpu.percent,
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threshold: alertConfig.cpuThreshold
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});
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}
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// Check memory threshold
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if (alertConfig.memoryThreshold && stats.memory.percent > alertConfig.memoryThreshold) {
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alerts.push({
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type: 'memory',
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severity: 'warning',
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message: `Memory usage ${stats.memory.percent.toFixed(1)}% exceeds threshold ${alertConfig.memoryThreshold}%`,
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value: stats.memory.percent,
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threshold: alertConfig.memoryThreshold
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});
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}
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// Check disk I/O threshold (MB/s)
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if (alertConfig.diskIOThreshold) {
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const diskIO = stats.disk.readMB + stats.disk.writeMB;
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if (diskIO > alertConfig.diskIOThreshold) {
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alerts.push({
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type: 'disk',
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severity: 'warning',
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message: `Disk I/O ${diskIO.toFixed(1)} MB/s exceeds threshold ${alertConfig.diskIOThreshold} MB/s`,
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value: diskIO,
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threshold: alertConfig.diskIOThreshold
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});
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}
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}
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if (alerts.length > 0) {
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this.lastAlerts.set(containerId, now);
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this.emit('alert', {
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containerId,
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containerName,
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timestamp: new Date().toISOString(),
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alerts,
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stats,
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config: alertConfig
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});
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// Auto-restart if configured
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if (alertConfig.autoRestart) {
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this.restartContainer(containerId, containerName, alerts);
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}
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}
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}
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/**
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* Restart a container due to resource alerts
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*/
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async restartContainer(containerId, containerName, alerts) {
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try {
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console.log(`[ResourceMonitor] Auto-restarting ${containerName} due to alerts:`, alerts.map(a => a.type).join(', '));
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const container = docker.getContainer(containerId);
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await container.restart();
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this.emit('auto-restart', {
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containerId,
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containerName,
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timestamp: new Date().toISOString(),
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reason: alerts
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});
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} catch (error) {
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console.error(`[ResourceMonitor] Failed to restart ${containerName}:`, error.message);
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}
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}
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/**
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* Get current stats for a container
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*/
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getCurrentStats(containerId) {
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const containerStats = this.stats.get(containerId);
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if (!containerStats || containerStats.history.length === 0) {
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return null;
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}
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return containerStats.history[containerStats.history.length - 1];
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}
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/**
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* Get historical stats for a container
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*/
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getHistoricalStats(containerId, hours = 24) {
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const containerStats = this.stats.get(containerId);
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if (!containerStats) return [];
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const cutoffTime = Date.now() - (hours * 60 * 60 * 1000);
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return containerStats.history.filter(s =>
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new Date(s.timestamp).getTime() > cutoffTime
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);
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}
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/**
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* Get aggregated stats for a container
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*/
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getAggregatedStats(containerId, hours = 24) {
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const history = this.getHistoricalStats(containerId, hours);
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if (history.length === 0) return null;
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const cpuValues = history.map(s => s.cpu.percent);
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const memoryValues = history.map(s => s.memory.percent);
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return {
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cpu: {
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current: cpuValues[cpuValues.length - 1],
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avg: cpuValues.reduce((a, b) => a + b, 0) / cpuValues.length,
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max: Math.max(...cpuValues),
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min: Math.min(...cpuValues)
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},
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memory: {
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current: memoryValues[memoryValues.length - 1],
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avg: memoryValues.reduce((a, b) => a + b, 0) / memoryValues.length,
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max: Math.max(...memoryValues),
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min: Math.min(...memoryValues)
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},
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dataPoints: history.length,
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timeRange: hours
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};
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}
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/**
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* Get stats for all containers
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*/
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getAllStats() {
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const result = {};
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for (const [containerId, data] of this.stats.entries()) {
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const current = this.getCurrentStats(containerId);
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const aggregated = this.getAggregatedStats(containerId, 24);
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result[containerId] = {
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name: data.name,
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current,
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aggregated,
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alertConfig: this.alerts.get(containerId)
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};
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}
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return result;
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}
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/**
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* Configure alerts for a container
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*/
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setAlertConfig(containerId, config) {
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this.alerts.set(containerId, {
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enabled: config.enabled !== false,
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cpuThreshold: config.cpuThreshold || null,
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memoryThreshold: config.memoryThreshold || null,
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diskIOThreshold: config.diskIOThreshold || null,
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cooldownMinutes: config.cooldownMinutes || 15,
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autoRestart: config.autoRestart || false,
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notificationChannels: config.notificationChannels || []
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});
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this.saveAlertConfig();
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}
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/**
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* Get alert configuration for a container
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*/
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getAlertConfig(containerId) {
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return this.alerts.get(containerId) || null;
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}
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/**
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* Remove alert configuration
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*/
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removeAlertConfig(containerId) {
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this.alerts.delete(containerId);
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this.lastAlerts.delete(containerId);
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this.saveAlertConfig();
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}
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/**
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* Cleanup old stats beyond retention period
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*/
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cleanupOldStats() {
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const cutoffTime = Date.now() - (STATS_RETENTION_HOURS * 60 * 60 * 1000);
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for (const [containerId, data] of this.stats.entries()) {
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data.history = data.history.filter(s =>
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new Date(s.timestamp).getTime() > cutoffTime
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);
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// Remove container stats if no recent data
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if (data.history.length === 0) {
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this.stats.delete(containerId);
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}
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}
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}
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/**
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* Load stats from disk
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*/
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loadStats() {
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try {
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if (fs.existsSync(STATS_FILE)) {
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const data = JSON.parse(fs.readFileSync(STATS_FILE, 'utf8'));
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this.stats = new Map(Object.entries(data));
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console.log(`[ResourceMonitor] Loaded stats for ${this.stats.size} containers`);
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}
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} catch (error) {
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console.error('[ResourceMonitor] Error loading stats:', error.message);
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}
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}
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/**
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* Save stats to disk
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*/
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saveStats() {
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try {
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const data = Object.fromEntries(this.stats);
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fs.writeFileSync(STATS_FILE, JSON.stringify(data, null, 2));
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} catch (error) {
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console.error('[ResourceMonitor] Error saving stats:', error.message);
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}
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}
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/**
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* Load alert configuration from disk
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*/
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loadAlertConfig() {
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try {
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if (fs.existsSync(ALERT_CONFIG_FILE)) {
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const data = JSON.parse(fs.readFileSync(ALERT_CONFIG_FILE, 'utf8'));
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this.alerts = new Map(Object.entries(data));
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console.log(`[ResourceMonitor] Loaded alert config for ${this.alerts.size} containers`);
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}
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} catch (error) {
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console.error('[ResourceMonitor] Error loading alert config:', error.message);
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}
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}
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/**
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* Save alert configuration to disk
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*/
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saveAlertConfig() {
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try {
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const data = Object.fromEntries(this.alerts);
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fs.writeFileSync(ALERT_CONFIG_FILE, JSON.stringify(data, null, 2));
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} catch (error) {
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console.error('[ResourceMonitor] Error saving alert config:', error.message);
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}
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}
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/**
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* Export stats for backup
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*/
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exportStats() {
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return {
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stats: Object.fromEntries(this.stats),
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alerts: Object.fromEntries(this.alerts),
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exportedAt: new Date().toISOString()
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};
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}
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/**
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* Import stats from backup
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*/
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importStats(data) {
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if (data.stats) {
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this.stats = new Map(Object.entries(data.stats));
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}
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if (data.alerts) {
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this.alerts = new Map(Object.entries(data.alerts));
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}
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this.saveStats();
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this.saveAlertConfig();
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}
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}
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// Export singleton instance
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module.exports = new ResourceMonitor();
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