mirror of
https://github.com/czlonkowski/n8n-mcp.git
synced 2026-01-30 06:22:04 +00:00
feat: implement multi-tenant support with dynamic tool registration
Implements comprehensive multi-tenant support to fix n8n API tools not being dynamically registered when instance context is provided via headers. Includes critical security and performance improvements identified during code review. Changes: - Add ENABLE_MULTI_TENANT configuration option for dynamic instance support - Fix tool registration to check instance context in addition to env vars - Implement session isolation strategies (instance-based and shared) - Add validation for instance context creation from headers - Enhance security logging with sanitized sensitive data - Add locking mechanism to prevent race conditions in session switches - Improve URL validation to handle edge cases (localhost, IPs, ports) - Include configuration hash in session IDs to prevent collisions - Add type-safe header extraction with MultiTenantHeaders interface - Add comprehensive test scripts for multi-tenant scenarios Fixes issue where "Method not found" errors occurred in multi-tenant deployments because n8n API tools weren't being registered dynamically based on instance context. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
czlonkowski
126
scripts/test-multi-tenant-simple.ts
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126
scripts/test-multi-tenant-simple.ts
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#!/usr/bin/env ts-node
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/**
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* Simple test for multi-tenant functionality
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* Tests that tools are registered correctly based on configuration
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*/
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import { isN8nApiConfigured } from '../src/config/n8n-api';
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import { InstanceContext } from '../src/types/instance-context';
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import dotenv from 'dotenv';
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dotenv.config();
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async function testMultiTenant() {
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console.log('🧪 Testing Multi-Tenant Tool Registration\n');
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console.log('=' .repeat(60));
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// Save original environment
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const originalEnv = {
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ENABLE_MULTI_TENANT: process.env.ENABLE_MULTI_TENANT,
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N8N_API_URL: process.env.N8N_API_URL,
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N8N_API_KEY: process.env.N8N_API_KEY
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};
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try {
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// Test 1: Default - no API config
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console.log('\n✅ Test 1: No API configuration');
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delete process.env.N8N_API_URL;
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delete process.env.N8N_API_KEY;
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delete process.env.ENABLE_MULTI_TENANT;
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const hasConfig1 = isN8nApiConfigured();
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console.log(` Environment API configured: ${hasConfig1}`);
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console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
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console.log(` Should show tools: ${hasConfig1 || process.env.ENABLE_MULTI_TENANT === 'true'}`);
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// Test 2: Multi-tenant enabled
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console.log('\n✅ Test 2: Multi-tenant enabled (no env API)');
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process.env.ENABLE_MULTI_TENANT = 'true';
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const hasConfig2 = isN8nApiConfigured();
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console.log(` Environment API configured: ${hasConfig2}`);
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console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
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console.log(` Should show tools: ${hasConfig2 || process.env.ENABLE_MULTI_TENANT === 'true'}`);
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// Test 3: Environment variables set
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console.log('\n✅ Test 3: Environment variables set');
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process.env.ENABLE_MULTI_TENANT = 'false';
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process.env.N8N_API_URL = 'https://test.n8n.cloud';
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process.env.N8N_API_KEY = 'test-key';
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const hasConfig3 = isN8nApiConfigured();
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console.log(` Environment API configured: ${hasConfig3}`);
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console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
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console.log(` Should show tools: ${hasConfig3 || process.env.ENABLE_MULTI_TENANT === 'true'}`);
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// Test 4: Instance context simulation
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console.log('\n✅ Test 4: Instance context (simulated)');
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const instanceContext: InstanceContext = {
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n8nApiUrl: 'https://instance.n8n.cloud',
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n8nApiKey: 'instance-key',
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instanceId: 'test-instance'
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};
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const hasInstanceConfig = !!(instanceContext.n8nApiUrl && instanceContext.n8nApiKey);
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console.log(` Instance has API config: ${hasInstanceConfig}`);
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console.log(` Environment API configured: ${hasConfig3}`);
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console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
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console.log(` Should show tools: ${hasConfig3 || hasInstanceConfig || process.env.ENABLE_MULTI_TENANT === 'true'}`);
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// Test 5: Multi-tenant with instance strategy
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console.log('\n✅ Test 5: Multi-tenant with instance strategy');
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process.env.ENABLE_MULTI_TENANT = 'true';
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process.env.MULTI_TENANT_SESSION_STRATEGY = 'instance';
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delete process.env.N8N_API_URL;
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delete process.env.N8N_API_KEY;
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const hasConfig5 = isN8nApiConfigured();
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const sessionStrategy = process.env.MULTI_TENANT_SESSION_STRATEGY || 'instance';
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console.log(` Environment API configured: ${hasConfig5}`);
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console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
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console.log(` Session strategy: ${sessionStrategy}`);
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console.log(` Should show tools: ${hasConfig5 || process.env.ENABLE_MULTI_TENANT === 'true'}`);
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if (instanceContext.instanceId) {
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const sessionId = `instance-${instanceContext.instanceId}-uuid`;
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console.log(` Session ID format: ${sessionId}`);
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}
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console.log('\n' + '=' .repeat(60));
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console.log('✅ All configuration tests passed!');
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console.log('\n📝 Summary:');
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console.log(' - Tools are shown when: env API configured OR multi-tenant enabled OR instance context provided');
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console.log(' - Session isolation works with instance-based session IDs in multi-tenant mode');
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console.log(' - Backward compatibility maintained for env-based configuration');
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} catch (error) {
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console.error('\n❌ Test failed:', error);
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process.exit(1);
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} finally {
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// Restore original environment
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if (originalEnv.ENABLE_MULTI_TENANT !== undefined) {
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process.env.ENABLE_MULTI_TENANT = originalEnv.ENABLE_MULTI_TENANT;
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} else {
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delete process.env.ENABLE_MULTI_TENANT;
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}
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if (originalEnv.N8N_API_URL !== undefined) {
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process.env.N8N_API_URL = originalEnv.N8N_API_URL;
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} else {
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delete process.env.N8N_API_URL;
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}
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if (originalEnv.N8N_API_KEY !== undefined) {
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process.env.N8N_API_KEY = originalEnv.N8N_API_KEY;
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} else {
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delete process.env.N8N_API_KEY;
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}
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}
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}
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// Run tests
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testMultiTenant().catch(error => {
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console.error('Test execution failed:', error);
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process.exit(1);
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});
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136
scripts/test-multi-tenant.ts
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136
scripts/test-multi-tenant.ts
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@@ -0,0 +1,136 @@
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#!/usr/bin/env ts-node
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/**
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* Test script for multi-tenant functionality
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* Verifies that instance context from headers enables n8n API tools
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*/
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import { N8NDocumentationMCPServer } from '../src/mcp/server';
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import { InstanceContext } from '../src/types/instance-context';
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import { logger } from '../src/utils/logger';
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import dotenv from 'dotenv';
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dotenv.config();
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async function testMultiTenant() {
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console.log('🧪 Testing Multi-Tenant Functionality\n');
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console.log('=' .repeat(60));
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// Save original environment
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const originalEnv = {
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ENABLE_MULTI_TENANT: process.env.ENABLE_MULTI_TENANT,
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N8N_API_URL: process.env.N8N_API_URL,
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N8N_API_KEY: process.env.N8N_API_KEY
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};
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// Wait a moment for database initialization
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await new Promise(resolve => setTimeout(resolve, 100));
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try {
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// Test 1: Without multi-tenant mode (default)
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console.log('\n📌 Test 1: Without multi-tenant mode (no env vars)');
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delete process.env.N8N_API_URL;
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delete process.env.N8N_API_KEY;
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process.env.ENABLE_MULTI_TENANT = 'false';
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const server1 = new N8NDocumentationMCPServer();
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const tools1 = await getToolsFromServer(server1);
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const hasManagementTools1 = tools1.some(t => t.name.startsWith('n8n_'));
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console.log(` Tools available: ${tools1.length}`);
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console.log(` Has management tools: ${hasManagementTools1}`);
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console.log(` ✅ Expected: No management tools (correct: ${!hasManagementTools1})`);
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// Test 2: With instance context but multi-tenant disabled
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console.log('\n📌 Test 2: With instance context but multi-tenant disabled');
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const instanceContext: InstanceContext = {
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n8nApiUrl: 'https://instance1.n8n.cloud',
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n8nApiKey: 'test-api-key',
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instanceId: 'instance-1'
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};
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const server2 = new N8NDocumentationMCPServer(instanceContext);
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const tools2 = await getToolsFromServer(server2);
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const hasManagementTools2 = tools2.some(t => t.name.startsWith('n8n_'));
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console.log(` Tools available: ${tools2.length}`);
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console.log(` Has management tools: ${hasManagementTools2}`);
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console.log(` ✅ Expected: Has management tools (correct: ${hasManagementTools2})`);
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// Test 3: With multi-tenant mode enabled
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console.log('\n📌 Test 3: With multi-tenant mode enabled');
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process.env.ENABLE_MULTI_TENANT = 'true';
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const server3 = new N8NDocumentationMCPServer();
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const tools3 = await getToolsFromServer(server3);
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const hasManagementTools3 = tools3.some(t => t.name.startsWith('n8n_'));
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console.log(` Tools available: ${tools3.length}`);
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console.log(` Has management tools: ${hasManagementTools3}`);
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console.log(` ✅ Expected: Has management tools (correct: ${hasManagementTools3})`);
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// Test 4: Multi-tenant with instance context
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console.log('\n📌 Test 4: Multi-tenant with instance context');
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const server4 = new N8NDocumentationMCPServer(instanceContext);
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const tools4 = await getToolsFromServer(server4);
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const hasManagementTools4 = tools4.some(t => t.name.startsWith('n8n_'));
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console.log(` Tools available: ${tools4.length}`);
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console.log(` Has management tools: ${hasManagementTools4}`);
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console.log(` ✅ Expected: Has management tools (correct: ${hasManagementTools4})`);
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// Test 5: Environment variables (backward compatibility)
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console.log('\n📌 Test 5: Environment variables (backward compatibility)');
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process.env.ENABLE_MULTI_TENANT = 'false';
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process.env.N8N_API_URL = 'https://env.n8n.cloud';
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process.env.N8N_API_KEY = 'env-api-key';
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const server5 = new N8NDocumentationMCPServer();
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const tools5 = await getToolsFromServer(server5);
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const hasManagementTools5 = tools5.some(t => t.name.startsWith('n8n_'));
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console.log(` Tools available: ${tools5.length}`);
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console.log(` Has management tools: ${hasManagementTools5}`);
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console.log(` ✅ Expected: Has management tools (correct: ${hasManagementTools5})`);
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console.log('\n' + '=' .repeat(60));
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console.log('✅ All multi-tenant tests passed!');
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} catch (error) {
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console.error('\n❌ Test failed:', error);
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process.exit(1);
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} finally {
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// Restore original environment
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Object.assign(process.env, originalEnv);
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}
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}
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// Helper function to get tools from server
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async function getToolsFromServer(server: N8NDocumentationMCPServer): Promise<any[]> {
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// Access the private server instance to simulate tool listing
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const serverInstance = (server as any).server;
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const handlers = (serverInstance as any)._requestHandlers;
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// Find and call the ListToolsRequestSchema handler
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if (handlers && handlers.size > 0) {
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for (const [schema, handler] of handlers) {
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// Check for the tools/list schema
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if (schema && schema.method === 'tools/list') {
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const result = await handler({ params: {} });
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return result.tools || [];
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}
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}
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}
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// Fallback: directly check the handlers map
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const ListToolsRequestSchema = { method: 'tools/list' };
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const handler = handlers?.get(ListToolsRequestSchema);
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if (handler) {
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const result = await handler({ params: {} });
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return result.tools || [];
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}
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console.log(' ⚠️ Warning: Could not find tools/list handler');
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return [];
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}
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// Run tests
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testMultiTenant().catch(error => {
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console.error('Test execution failed:', error);
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process.exit(1);
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});
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