Initial commit: Brainy - Multi-Dimensional AI Database
Open source vector database with HNSW indexing, graph relationships, and metadata facets. Features CLI with professional augmentation registry integration for discovering extensions and capabilities.
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f8c45f2d8d
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441
dist/distributed/configManager.js
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441
dist/distributed/configManager.js
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/**
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* Distributed Configuration Manager
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* Manages shared configuration in S3 for distributed Brainy instances
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*/
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import { v4 as uuidv4 } from '../universal/uuid.js';
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// Constants for config storage locations
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const DISTRIBUTED_CONFIG_KEY = 'distributed_config';
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const LEGACY_CONFIG_KEY = '_distributed_config';
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export class DistributedConfigManager {
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constructor(storage, distributedConfig, brainyMode) {
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this.config = null;
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this.lastConfigVersion = 0;
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this.hasMigrated = false;
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this.storage = storage;
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this.instanceId = distributedConfig?.instanceId || `instance-${uuidv4()}`;
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// Updated default path to use _system instead of _brainy
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this.configPath = distributedConfig?.configPath || '_system/distributed_config.json';
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this.heartbeatInterval = distributedConfig?.heartbeatInterval || 30000;
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this.configCheckInterval = distributedConfig?.configCheckInterval || 10000;
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this.instanceTimeout = distributedConfig?.instanceTimeout || 60000;
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// Set role from distributed config if provided
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if (distributedConfig?.role) {
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this.role = distributedConfig.role;
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}
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// Infer role from Brainy's read/write mode if not explicitly set
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else if (brainyMode) {
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if (brainyMode.writeOnly) {
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this.role = 'writer';
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}
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else if (brainyMode.readOnly) {
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this.role = 'reader';
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}
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// If neither readOnly nor writeOnly, role must be explicitly set
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}
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}
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/**
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* Initialize the distributed configuration
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*/
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async initialize() {
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// Load or create configuration
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this.config = await this.loadOrCreateConfig();
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// Determine role if not explicitly set
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if (!this.role) {
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this.role = await this.determineRole();
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}
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// Register this instance
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await this.registerInstance();
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// Start heartbeat and config watching
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this.startHeartbeat();
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this.startConfigWatch();
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return this.config;
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}
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/**
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* Load existing config or create new one
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*/
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async loadOrCreateConfig() {
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// First, try to load from the new location in index folder
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try {
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const configData = await this.storage.getStatistics();
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if (configData && configData.distributedConfig) {
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this.lastConfigVersion = configData.distributedConfig.version;
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return configData.distributedConfig;
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}
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}
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catch (error) {
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// Config doesn't exist in new location yet
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}
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// Check if we need to migrate from old location
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if (!this.hasMigrated) {
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const migrated = await this.migrateConfigFromLegacyLocation();
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if (migrated) {
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return migrated;
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}
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}
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// Legacy fallback - try old location
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try {
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const configData = await this.storage.getMetadata(LEGACY_CONFIG_KEY);
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if (configData) {
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// Migrate to new location
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await this.migrateConfig(configData);
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this.lastConfigVersion = configData.version;
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return configData;
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}
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}
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catch (error) {
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// Config doesn't exist yet
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}
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// Create default config
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const newConfig = {
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version: 1,
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updated: new Date().toISOString(),
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settings: {
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partitionStrategy: 'hash',
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partitionCount: 100,
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embeddingModel: 'text-embedding-ada-002',
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dimensions: 1536,
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distanceMetric: 'cosine',
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hnswParams: {
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M: 16,
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efConstruction: 200
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}
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},
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instances: {}
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};
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await this.saveConfig(newConfig);
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return newConfig;
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}
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/**
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* Determine role based on configuration
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* IMPORTANT: Role must be explicitly set - no automatic assignment based on order
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*/
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async determineRole() {
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// Check environment variable first
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if (process.env.BRAINY_ROLE) {
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const role = process.env.BRAINY_ROLE.toLowerCase();
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if (role === 'writer' || role === 'reader' || role === 'hybrid') {
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return role;
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}
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throw new Error(`Invalid BRAINY_ROLE: ${process.env.BRAINY_ROLE}. Must be 'writer', 'reader', or 'hybrid'`);
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}
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// Check if explicitly passed in distributed config
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if (this.role) {
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return this.role;
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}
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// DO NOT auto-assign roles based on deployment order or existing instances
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// This is dangerous and can lead to data corruption or loss
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throw new Error('Distributed mode requires explicit role configuration. ' +
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'Set BRAINY_ROLE environment variable or pass role in distributed config. ' +
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'Valid roles: "writer", "reader", "hybrid"');
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}
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/**
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* Check if an instance is still alive
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*/
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isInstanceAlive(instance) {
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const lastSeen = new Date(instance.lastHeartbeat).getTime();
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const now = Date.now();
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return (now - lastSeen) < this.instanceTimeout;
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}
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/**
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* Register this instance in the shared config
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*/
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async registerInstance() {
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if (!this.config)
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return;
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// Role must be set by this point
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if (!this.role) {
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throw new Error('Cannot register instance without a role');
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}
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const instanceInfo = {
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role: this.role,
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status: 'active',
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lastHeartbeat: new Date().toISOString(),
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metrics: {
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memoryUsage: process.memoryUsage().heapUsed
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}
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};
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// Add endpoint if available
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if (process.env.SERVICE_ENDPOINT) {
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instanceInfo.endpoint = process.env.SERVICE_ENDPOINT;
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}
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this.config.instances[this.instanceId] = instanceInfo;
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await this.saveConfig(this.config);
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}
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/**
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* Migrate config from legacy location to new location
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*/
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async migrateConfigFromLegacyLocation() {
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try {
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// Try to load from old location
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const legacyConfig = await this.storage.getMetadata(LEGACY_CONFIG_KEY);
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if (legacyConfig) {
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console.log('Migrating distributed config from legacy location to index folder...');
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// Save to new location
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await this.migrateConfig(legacyConfig);
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// Delete from old location (optional - we can keep it for rollback)
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// await this.storage.deleteMetadata(LEGACY_CONFIG_KEY)
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this.hasMigrated = true;
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this.lastConfigVersion = legacyConfig.version;
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return legacyConfig;
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}
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}
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catch (error) {
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console.error('Error during config migration:', error);
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}
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this.hasMigrated = true;
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return null;
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}
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/**
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* Migrate config to new location in index folder
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*/
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async migrateConfig(config) {
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// Get existing statistics or create new
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let stats = await this.storage.getStatistics();
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if (!stats) {
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stats = {
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nounCount: {},
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verbCount: {},
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metadataCount: {},
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hnswIndexSize: 0,
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lastUpdated: new Date().toISOString()
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};
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}
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// Add distributed config to statistics
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stats.distributedConfig = config;
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// Save updated statistics
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await this.storage.saveStatistics(stats);
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}
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/**
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* Save configuration with version increment
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*/
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async saveConfig(config) {
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config.version++;
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config.updated = new Date().toISOString();
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this.lastConfigVersion = config.version;
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// Save to new location in index folder along with statistics
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let stats = await this.storage.getStatistics();
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if (!stats) {
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stats = {
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nounCount: {},
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verbCount: {},
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metadataCount: {},
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hnswIndexSize: 0,
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lastUpdated: new Date().toISOString()
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};
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}
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// Update distributed config in statistics
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stats.distributedConfig = config;
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// Save updated statistics
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await this.storage.saveStatistics(stats);
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this.config = config;
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}
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/**
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* Start heartbeat to keep instance alive in config
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*/
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startHeartbeat() {
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this.heartbeatTimer = setInterval(async () => {
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await this.updateHeartbeat();
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}, this.heartbeatInterval);
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}
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/**
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* Update heartbeat and clean stale instances
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*/
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async updateHeartbeat() {
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if (!this.config)
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return;
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// Reload config to get latest state
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try {
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const latestConfig = await this.loadConfig();
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if (latestConfig) {
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this.config = latestConfig;
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}
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}
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catch (error) {
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console.error('Failed to reload config:', error);
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}
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// Update our heartbeat
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if (this.config.instances[this.instanceId]) {
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this.config.instances[this.instanceId].lastHeartbeat = new Date().toISOString();
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this.config.instances[this.instanceId].status = 'active';
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// Update metrics if available
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this.config.instances[this.instanceId].metrics = {
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memoryUsage: process.memoryUsage().heapUsed
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};
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}
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else {
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// Re-register if we were removed
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await this.registerInstance();
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return;
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}
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// Clean up stale instances
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const now = Date.now();
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let hasChanges = false;
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for (const [id, instance] of Object.entries(this.config.instances)) {
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if (id === this.instanceId)
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continue;
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const lastSeen = new Date(instance.lastHeartbeat).getTime();
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if (now - lastSeen > this.instanceTimeout) {
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delete this.config.instances[id];
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hasChanges = true;
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}
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}
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// Save if there were changes
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if (hasChanges) {
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await this.saveConfig(this.config);
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}
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else {
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// Just update our heartbeat without version increment
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// Get existing statistics
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let stats = await this.storage.getStatistics();
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if (!stats) {
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stats = {
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nounCount: {},
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verbCount: {},
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metadataCount: {},
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hnswIndexSize: 0,
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lastUpdated: new Date().toISOString()
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};
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}
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// Update distributed config in statistics without version increment
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stats.distributedConfig = this.config;
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// Save updated statistics
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await this.storage.saveStatistics(stats);
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}
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}
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/**
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* Start watching for config changes
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*/
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startConfigWatch() {
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this.configWatchTimer = setInterval(async () => {
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await this.checkForConfigUpdates();
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}, this.configCheckInterval);
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}
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/**
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* Check for configuration updates
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*/
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async checkForConfigUpdates() {
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try {
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const latestConfig = await this.loadConfig();
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if (!latestConfig)
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return;
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if (latestConfig.version > this.lastConfigVersion) {
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this.config = latestConfig;
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this.lastConfigVersion = latestConfig.version;
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// Notify listeners of config update
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if (this.onConfigUpdate) {
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this.onConfigUpdate(latestConfig);
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}
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}
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}
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catch (error) {
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console.error('Failed to check config updates:', error);
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}
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}
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/**
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* Load configuration from storage
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*/
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async loadConfig() {
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try {
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// Try new location first
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const stats = await this.storage.getStatistics();
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if (stats && stats.distributedConfig) {
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return stats.distributedConfig;
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}
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// Fallback to legacy location if not migrated yet
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if (!this.hasMigrated) {
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const configData = await this.storage.getMetadata(LEGACY_CONFIG_KEY);
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if (configData) {
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// Trigger migration on next save
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return configData;
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}
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}
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}
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catch (error) {
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console.error('Failed to load config:', error);
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}
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return null;
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}
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/**
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* Get current configuration
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*/
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getConfig() {
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return this.config;
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}
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/**
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* Get instance role
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*/
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getRole() {
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if (!this.role) {
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throw new Error('Role not initialized');
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}
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return this.role;
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}
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/**
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* Get instance ID
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*/
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getInstanceId() {
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return this.instanceId;
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}
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/**
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* Set config update callback
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*/
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setOnConfigUpdate(callback) {
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this.onConfigUpdate = callback;
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}
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/**
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* Get all active instances of a specific role
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*/
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getInstancesByRole(role) {
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if (!this.config)
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return [];
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return Object.entries(this.config.instances)
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.filter(([_, instance]) => instance.role === role &&
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this.isInstanceAlive(instance))
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.map(([_, instance]) => instance);
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}
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/**
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* Update instance metrics
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*/
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async updateMetrics(metrics) {
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if (!this.config || !this.config.instances[this.instanceId])
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return;
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this.config.instances[this.instanceId].metrics = {
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...this.config.instances[this.instanceId].metrics,
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...metrics
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};
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// Don't increment version for metric updates
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// Get existing statistics
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let stats = await this.storage.getStatistics();
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if (!stats) {
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stats = {
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nounCount: {},
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verbCount: {},
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metadataCount: {},
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hnswIndexSize: 0,
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lastUpdated: new Date().toISOString()
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};
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}
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// Update distributed config in statistics without version increment
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stats.distributedConfig = this.config;
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// Save updated statistics
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await this.storage.saveStatistics(stats);
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}
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/**
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* Cleanup resources
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*/
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async cleanup() {
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// Stop timers
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if (this.heartbeatTimer) {
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clearInterval(this.heartbeatTimer);
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}
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if (this.configWatchTimer) {
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clearInterval(this.configWatchTimer);
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}
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// Mark instance as inactive
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if (this.config && this.config.instances[this.instanceId]) {
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this.config.instances[this.instanceId].status = 'inactive';
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await this.saveConfig(this.config);
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}
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}
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}
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//# sourceMappingURL=configManager.js.map
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