Add Docker hygiene, deployment manifests, and daily log digest
Prevents Docker disk bloat by adding log rotation (10MB max, 3 files) to all container creation and update paths, auto-pruning dangling images after deploy/remove/update, and a daily maintenance module that cleans build cache and warns on disk thresholds. Saves a deployment manifest in services.json at deploy time so users can restore all their apps after a Docker purge. Adds restore-all and restore-single endpoints that recreate containers, Caddy config, and DNS records from the saved manifests. Adds an hourly log collector and daily digest generator that summarizes errors, warnings, and events across all services into a single human-readable report with guidance on where to investigate. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
575
dashcaddy-api/log-digest.js
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575
dashcaddy-api/log-digest.js
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@@ -0,0 +1,575 @@
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/**
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* Log Digest Module
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* Collects container logs hourly, generates daily summaries.
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* Gives users a single place to see what happened across all services
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* and guidance on where to look for more detail.
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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 fsp = require('fs').promises;
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const path = require('path');
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const { DOCKER } = require('./constants');
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const docker = new Docker();
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const ERROR_PATTERNS = [
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/\berror\b/i, /\bfailed\b/i, /\bfatal\b/i, /\bpanic\b/i,
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/\bcrash(ed)?\b/i, /\bexception\b/i, /\btimeout\b/i,
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/\bOOM\b/, /\bout of memory\b/i, /\bkilled\b/i,
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/\bdenied\b/i, /\bunauthorized\b/i, /\brefused\b/i
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];
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const WARNING_PATTERNS = [
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/\bwarn(ing)?\b/i, /\bdeprecated\b/i, /\bretry(ing)?\b/i,
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/\bslow\b/i, /\blatency\b/i
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];
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const EVENT_PATTERNS = [
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{ pattern: /\b(start(ed|ing)?|boot(ed|ing)?|init(ializ(ed|ing))?)\b/i, type: 'startup' },
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{ pattern: /\b(stop(ped|ping)?|shutdown|exit(ed|ing)?|terminat(ed|ing)?)\b/i, type: 'shutdown' },
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{ pattern: /\b(restart(ed|ing)?|reload(ed|ing)?)\b/i, type: 'restart' },
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{ pattern: /\bhealth.?check.*(fail|unhealthy)\b/i, type: 'health_failure' },
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{ pattern: /\b(update|upgrade|migration)\b/i, type: 'update' }
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];
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class LogDigest extends EventEmitter {
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constructor() {
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super();
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this.collectInterval = null;
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this.digestTimeout = null;
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this.running = false;
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this.hourlySummaries = []; // Ring buffer of hourly snapshots
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this.digestDir = null; // Set during start()
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this.lastCollect = null;
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this._lastCollectTimestamp = {}; // Per-container: last log timestamp fetched
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}
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/**
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* Start the log digest system.
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* @param {string} digestDir - Directory to write daily digest files
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*/
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start(digestDir) {
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if (this.running) return;
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this.running = true;
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this.digestDir = digestDir;
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// Ensure digest directory exists
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if (!fs.existsSync(digestDir)) {
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fs.mkdirSync(digestDir, { recursive: true });
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}
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// Collect logs every hour
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this.collectInterval = setInterval(() => {
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this._collectHourlyLogs().catch(e =>
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console.error('[LogDigest] Hourly collection failed:', e.message)
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);
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}, DOCKER.DIGEST.COLLECT_INTERVAL);
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// Schedule daily digest generation
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this._scheduleDailyDigest();
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// Run initial collection after 2 minutes
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setTimeout(() => {
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if (this.running) {
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this._collectHourlyLogs().catch(() => {});
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}
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}, 2 * 60 * 1000);
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}
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stop() {
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if (!this.running) return;
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this.running = false;
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if (this.collectInterval) {
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clearInterval(this.collectInterval);
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this.collectInterval = null;
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}
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if (this.digestTimeout) {
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clearTimeout(this.digestTimeout);
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this.digestTimeout = null;
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}
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}
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/**
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* Collect logs from all managed containers for the last hour.
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*/
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async _collectHourlyLogs() {
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const now = new Date();
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const sinceTimestamp = Math.floor((now.getTime() - DOCKER.DIGEST.COLLECT_INTERVAL) / 1000);
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const hourKey = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}-${String(now.getDate()).padStart(2, '0')}T${String(now.getHours()).padStart(2, '0')}:00`;
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const hourSummary = {
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hour: hourKey,
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timestamp: now.toISOString(),
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services: {}
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};
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try {
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const containers = await docker.listContainers({ all: true });
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const managed = containers.filter(c => c.Labels?.['sami.managed'] === 'true');
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for (const containerInfo of managed) {
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const name = containerInfo.Names[0]?.replace(/^\//, '') || containerInfo.Id.slice(0, 12);
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const appId = containerInfo.Labels['sami.app'] || name;
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const isRunning = containerInfo.State === 'running';
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const serviceSummary = {
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name,
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appId,
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state: containerInfo.State,
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errors: [],
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warnings: [],
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events: [],
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errorCount: 0,
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warningCount: 0,
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totalLines: 0
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};
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if (isRunning) {
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try {
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const container = docker.getContainer(containerInfo.Id);
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const logBuffer = await container.logs({
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stdout: true,
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stderr: true,
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since: sinceTimestamp,
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tail: DOCKER.DIGEST.LOG_TAIL,
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timestamps: true
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});
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const lines = this._parseDockerLogs(logBuffer);
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serviceSummary.totalLines = lines.length;
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for (const line of lines) {
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// Check for errors
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if (line.stream === 'stderr' || ERROR_PATTERNS.some(p => p.test(line.text))) {
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serviceSummary.errorCount++;
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if (serviceSummary.errors.length < 10) {
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serviceSummary.errors.push({
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time: line.timestamp || hourKey,
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text: line.text.slice(0, 500)
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});
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}
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continue;
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}
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// Check for warnings
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if (WARNING_PATTERNS.some(p => p.test(line.text))) {
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serviceSummary.warningCount++;
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if (serviceSummary.warnings.length < 5) {
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serviceSummary.warnings.push({
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time: line.timestamp || hourKey,
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text: line.text.slice(0, 300)
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});
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}
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continue;
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}
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// Check for notable events
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for (const { pattern, type } of EVENT_PATTERNS) {
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if (pattern.test(line.text)) {
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serviceSummary.events.push({
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type,
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time: line.timestamp || hourKey,
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text: line.text.slice(0, 300)
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});
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break;
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}
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}
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}
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} catch (logErr) {
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serviceSummary.errors.push({
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time: now.toISOString(),
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text: `Failed to fetch logs: ${logErr.message}`
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});
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serviceSummary.errorCount++;
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}
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} else {
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serviceSummary.events.push({
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type: 'not_running',
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time: now.toISOString(),
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text: `Container is ${containerInfo.State}`
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});
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}
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hourSummary.services[appId] = serviceSummary;
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}
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} catch (e) {
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console.error('[LogDigest] Container enumeration failed:', e.message);
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}
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// Add to ring buffer
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this.hourlySummaries.push(hourSummary);
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if (this.hourlySummaries.length > DOCKER.DIGEST.MAX_HOURLY_ENTRIES) {
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this.hourlySummaries.shift();
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}
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this.lastCollect = now.toISOString();
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this.emit('hourly-collected', hourSummary);
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return hourSummary;
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}
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/**
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* Parse Docker multiplexed log stream into lines.
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*/
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_parseDockerLogs(logData) {
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const lines = [];
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const buffer = Buffer.isBuffer(logData) ? logData : Buffer.from(logData);
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let offset = 0;
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while (offset < buffer.length) {
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if (offset + 8 > buffer.length) break;
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const streamType = buffer[0 + offset];
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const size = buffer.readUInt32BE(4 + offset);
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if (offset + 8 + size > buffer.length) break;
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const text = buffer.slice(offset + 8, offset + 8 + size).toString('utf8').trim();
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if (text) {
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// Try to extract timestamp from Docker's format: "2026-03-13T12:00:00.000000000Z message"
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let timestamp = null;
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let message = text;
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const tsMatch = text.match(/^(\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2})\.\d+Z\s(.*)$/s);
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if (tsMatch) {
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timestamp = tsMatch[1];
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message = tsMatch[2];
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}
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lines.push({
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stream: streamType === 2 ? 'stderr' : 'stdout',
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text: message,
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timestamp
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});
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}
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offset += 8 + size;
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}
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return lines;
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}
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/**
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* Schedule the daily digest at the configured hour.
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*/
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_scheduleDailyDigest() {
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const now = new Date();
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const targetHour = DOCKER.DIGEST.DIGEST_HOUR;
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const next = new Date(now);
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next.setHours(targetHour, 5, 0, 0); // 5 minutes past the hour
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if (next <= now) next.setDate(next.getDate() + 1);
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const delay = next.getTime() - now.getTime();
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this.digestTimeout = setTimeout(() => {
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this.generateDailyDigest().catch(e =>
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console.error('[LogDigest] Daily digest generation failed:', e.message)
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);
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// Reschedule for tomorrow
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if (this.running) this._scheduleDailyDigest();
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}, delay);
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}
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/**
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* Generate the daily digest from accumulated hourly summaries.
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* Can also be called on-demand.
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*/
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async generateDailyDigest(dateStr) {
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const date = dateStr || new Date(Date.now() - 86400000).toISOString().slice(0, 10);
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const relevantHours = this.hourlySummaries.filter(h => h.hour.startsWith(date));
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// Aggregate per-service stats across all hours
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const serviceAgg = {};
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const notableEvents = [];
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for (const hour of relevantHours) {
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for (const [appId, svc] of Object.entries(hour.services)) {
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if (!serviceAgg[appId]) {
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serviceAgg[appId] = {
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name: svc.name,
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appId,
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totalErrors: 0,
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totalWarnings: 0,
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totalLines: 0,
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lastState: svc.state,
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topErrors: [],
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events: []
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};
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}
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const agg = serviceAgg[appId];
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agg.totalErrors += svc.errorCount;
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agg.totalWarnings += svc.warningCount;
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agg.totalLines += svc.totalLines;
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agg.lastState = svc.state;
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// Keep top errors (deduplicated-ish)
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for (const err of svc.errors) {
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if (agg.topErrors.length < 5) {
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agg.topErrors.push(err);
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}
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}
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// Collect notable events
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for (const evt of svc.events) {
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notableEvents.push({ ...evt, service: svc.name, appId });
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}
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}
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}
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// Get Docker disk usage
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let diskUsage = null;
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try {
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const dockerMaintenance = require('./docker-maintenance');
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diskUsage = await dockerMaintenance.getDiskUsage();
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} catch (e) {
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// Module may not be loaded yet
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}
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// Build digest object
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const digest = {
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date,
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generatedAt: new Date().toISOString(),
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hoursCollected: relevantHours.length,
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services: serviceAgg,
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notableEvents: notableEvents.sort((a, b) => (a.time || '').localeCompare(b.time || '')),
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diskUsage,
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summary: {
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totalServices: Object.keys(serviceAgg).length,
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servicesWithErrors: Object.values(serviceAgg).filter(s => s.totalErrors > 0).length,
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totalErrors: Object.values(serviceAgg).reduce((sum, s) => sum + s.totalErrors, 0),
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totalWarnings: Object.values(serviceAgg).reduce((sum, s) => sum + s.totalWarnings, 0)
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}
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};
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// Write formatted digest file
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const formatted = this._formatDigest(digest);
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const filename = `digest-${date}.log`;
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const filepath = path.join(this.digestDir, filename);
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await fsp.writeFile(filepath, formatted, 'utf8');
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// Also write JSON for API consumption
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const jsonPath = path.join(this.digestDir, `digest-${date}.json`);
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await fsp.writeFile(jsonPath, JSON.stringify(digest, null, 2), 'utf8');
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// Cleanup old digests
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await this._cleanupOldDigests();
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this.emit('digest-generated', { date, filepath, digest });
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return digest;
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}
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/**
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* Format digest into human-readable text.
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*/
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_formatDigest(digest) {
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const lines = [];
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const hr = '='.repeat(55);
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const sr = '-'.repeat(55);
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lines.push(hr);
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lines.push(' DashCaddy Daily Log Digest');
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lines.push(` ${digest.date}`);
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lines.push(` Generated: ${digest.generatedAt}`);
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lines.push(hr);
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lines.push('');
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// Service summary table
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lines.push('-- Service Summary ' + '-'.repeat(36));
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const services = Object.values(digest.services);
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if (services.length === 0) {
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lines.push(' No managed services found.');
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} else {
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for (const svc of services) {
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const stateIcon = svc.lastState === 'running' ? 'OK' : '!!';
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const errStr = `${svc.totalErrors} error${svc.totalErrors !== 1 ? 's' : ''}`;
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const warnStr = `${svc.totalWarnings} warning${svc.totalWarnings !== 1 ? 's' : ''}`;
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const flag = svc.totalErrors > 0 ? ' <-- investigate' : '';
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lines.push(` ${svc.name.padEnd(18)} ${stateIcon.padEnd(10)} ${errStr.padEnd(14)} ${warnStr}${flag}`);
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}
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}
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lines.push('');
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// Notable events
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const events = digest.notableEvents;
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if (events.length > 0) {
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lines.push('-- Notable Events ' + '-'.repeat(37));
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for (const evt of events) {
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const time = (evt.time || '').slice(11, 16) || '??:??';
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lines.push(` [${time}] ${evt.service}: ${evt.text.slice(0, 80)}`);
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// Add guidance for where to look further
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const containerName = `${DOCKER.CONTAINER_PREFIX}${evt.appId}`;
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if (evt.type === 'health_failure' || evt.type === 'restart') {
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const sinceDate = digest.date + 'T' + (evt.time || '').slice(11, 13) + ':00:00';
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lines.push(` See: docker logs ${containerName} --since ${sinceDate}`);
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}
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}
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lines.push('');
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}
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// Top errors per service
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const errServices = services.filter(s => s.totalErrors > 0);
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if (errServices.length > 0) {
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lines.push('-- Error Details ' + '-'.repeat(38));
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for (const svc of errServices) {
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lines.push(` ${svc.name} (${svc.totalErrors} errors):`);
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for (const err of svc.topErrors) {
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const time = (err.time || '').slice(11, 16) || '??:??';
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lines.push(` [${time}] ${err.text.slice(0, 100)}`);
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}
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const containerName = `${DOCKER.CONTAINER_PREFIX}${svc.appId}`;
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lines.push(` Full logs: docker logs ${containerName} --since ${digest.date}T00:00:00`);
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lines.push('');
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}
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}
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// Docker disk usage
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if (digest.diskUsage) {
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lines.push('-- Docker Disk Usage ' + '-'.repeat(34));
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const du = digest.diskUsage;
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lines.push(` Images: ${formatBytes(du.images.sizeBytes)} (${du.images.count} images)`);
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lines.push(` Containers: ${formatBytes(du.containers.sizeBytes)}`);
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lines.push(` Volumes: ${formatBytes(du.volumes.sizeBytes)} (${du.volumes.count} volumes)`);
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lines.push(` Build Cache: ${formatBytes(du.buildCache.sizeBytes)}`);
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lines.push(` Total: ${du.totalGB} GB`);
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if (du.totalGB > DOCKER.MAINTENANCE.DISK_WARN_GB) {
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lines.push(` WARNING: Exceeds ${DOCKER.MAINTENANCE.DISK_WARN_GB}GB threshold!`);
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lines.push(' Run: docker system prune -a (removes unused images/cache)');
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}
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lines.push('');
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}
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// Summary
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lines.push(sr);
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lines.push(` ${digest.summary.totalServices} service(s) monitored | ${digest.summary.totalErrors} error(s) | ${digest.summary.totalWarnings} warning(s)`);
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lines.push(` Hours collected: ${digest.hoursCollected}/24`);
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lines.push(hr);
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return lines.join('\n') + '\n';
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}
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/**
|
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* Remove digest files older than MAX_DIGEST_FILES days.
|
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*/
|
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async _cleanupOldDigests() {
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if (!this.digestDir) return;
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try {
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const files = await fsp.readdir(this.digestDir);
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const digestFiles = files.filter(f => f.startsWith('digest-')).sort();
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// Each date has .log + .json = 2 files per day
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const maxFiles = DOCKER.DIGEST.MAX_DIGEST_FILES * 2;
|
||||
if (digestFiles.length > maxFiles) {
|
||||
const toDelete = digestFiles.slice(0, digestFiles.length - maxFiles);
|
||||
for (const f of toDelete) {
|
||||
await fsp.unlink(path.join(this.digestDir, f)).catch(() => {});
|
||||
}
|
||||
}
|
||||
} catch (e) {
|
||||
// Directory may not exist yet
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the latest daily digest (JSON).
|
||||
*/
|
||||
async getLatestDigest() {
|
||||
if (!this.digestDir) return null;
|
||||
try {
|
||||
const files = await fsp.readdir(this.digestDir);
|
||||
const jsonFiles = files.filter(f => f.endsWith('.json')).sort();
|
||||
if (jsonFiles.length === 0) return null;
|
||||
const latest = path.join(this.digestDir, jsonFiles[jsonFiles.length - 1]);
|
||||
return JSON.parse(await fsp.readFile(latest, 'utf8'));
|
||||
} catch (e) {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get digest for a specific date.
|
||||
*/
|
||||
async getDigestByDate(dateStr) {
|
||||
if (!this.digestDir) return null;
|
||||
const jsonPath = path.join(this.digestDir, `digest-${dateStr}.json`);
|
||||
try {
|
||||
return JSON.parse(await fsp.readFile(jsonPath, 'utf8'));
|
||||
} catch (e) {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the formatted text version of a digest.
|
||||
*/
|
||||
async getDigestText(dateStr) {
|
||||
if (!this.digestDir) return null;
|
||||
const logPath = path.join(this.digestDir, `digest-${dateStr}.log`);
|
||||
try {
|
||||
return await fsp.readFile(logPath, 'utf8');
|
||||
} catch (e) {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* List available digest dates.
|
||||
*/
|
||||
async listDigests() {
|
||||
if (!this.digestDir) return [];
|
||||
try {
|
||||
const files = await fsp.readdir(this.digestDir);
|
||||
return files
|
||||
.filter(f => f.endsWith('.json'))
|
||||
.map(f => f.replace('digest-', '').replace('.json', ''))
|
||||
.sort()
|
||||
.reverse();
|
||||
} catch (e) {
|
||||
return [];
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get live data: current day's accumulated hourly summaries.
|
||||
*/
|
||||
getLiveData() {
|
||||
const today = new Date().toISOString().slice(0, 10);
|
||||
const todayHours = this.hourlySummaries.filter(h => h.hour.startsWith(today));
|
||||
|
||||
// Aggregate
|
||||
const serviceAgg = {};
|
||||
for (const hour of todayHours) {
|
||||
for (const [appId, svc] of Object.entries(hour.services)) {
|
||||
if (!serviceAgg[appId]) {
|
||||
serviceAgg[appId] = { name: svc.name, appId, totalErrors: 0, totalWarnings: 0, lastState: svc.state, recentErrors: [] };
|
||||
}
|
||||
serviceAgg[appId].totalErrors += svc.errorCount;
|
||||
serviceAgg[appId].totalWarnings += svc.warningCount;
|
||||
serviceAgg[appId].lastState = svc.state;
|
||||
for (const err of svc.errors) {
|
||||
if (serviceAgg[appId].recentErrors.length < 10) {
|
||||
serviceAgg[appId].recentErrors.push(err);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return {
|
||||
date: today,
|
||||
hoursCollected: todayHours.length,
|
||||
lastCollect: this.lastCollect,
|
||||
services: serviceAgg
|
||||
};
|
||||
}
|
||||
|
||||
getStatus() {
|
||||
return {
|
||||
running: this.running,
|
||||
lastCollect: this.lastCollect,
|
||||
hourlySummaries: this.hourlySummaries.length,
|
||||
digestDir: this.digestDir
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
function formatBytes(bytes) {
|
||||
if (bytes === 0) return '0 B';
|
||||
const units = ['B', 'KB', 'MB', 'GB', 'TB'];
|
||||
const i = Math.floor(Math.log(bytes) / Math.log(1024));
|
||||
return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + units[i];
|
||||
}
|
||||
|
||||
module.exports = new LogDigest();
|
||||
Reference in New Issue
Block a user