# Docker Testing Results

## Testing Date: June 13, 2025

### Test Environment
- Docker version: Docker Desktop on macOS
- Platform: arm64 (Apple Silicon)
- Node.js in container: v20.19.2

## Test Results Summary

### ✅ Successful Tests

1. **Docker Build Process**
   - Multi-stage build completes successfully
   - Build context optimized from 1.75GB to 6.87KB with proper .dockerignore
   - All layers cache properly for faster rebuilds

2. **Health Endpoint**
   - Returns proper JSON response
   - Shows correct uptime, memory usage, and version
   - Accessible at http://localhost:3000/health

3. **Authentication (HTTP Mode)**
   - Correctly rejects requests with wrong token (401 Unauthorized)
   - Accepts requests with correct AUTH_TOKEN
   - Warns when AUTH_TOKEN is less than 32 characters

4. **Docker Compose Deployment**
   - Creates named volumes for persistence
   - Respects resource limits (512MB max, 256MB reserved)
   - Health checks run every 30 seconds
   - Graceful shutdown on SIGTERM

5. **Stdio Mode**
   - Container starts in stdio mode with MCP_MODE=stdio
   - Accepts JSON-RPC input via stdin
   - Returns responses via stdout

### ⚠️ Issues Discovered

1. **Database Initialization Failure**
   ```
   Error: ENOENT: no such file or directory, open '/app/src/database/schema.sql'
   ```
   - Cause: schema.sql not included in Docker image
   - Impact: Database cannot be initialized on first run
   - Fix: Include src/database/schema.sql in Dockerfile

2. **MCP Endpoint Error**
   ```json
   {
     "error": {
       "code": -32700,
       "message": "Parse error",
       "data": "InternalServerError: stream is not readable"
     }
   }
   ```
   - Likely related to missing database
   - Needs investigation after fixing database initialization

3. **Large Image Size**
   - Current size: 2.61GB
   - Cause: All node_modules included in production
   - Potential optimization: Use Alpine packages where possible

### 📊 Performance Metrics

- Build time: ~5 minutes (with cache)
- Startup time: <2 seconds
- Memory usage: ~8-9MB (idle)
- Health check response time: <50ms

### 🔧 Recommended Fixes

1. **Immediate (Phase 1)** ✅ FIXED
   - ✅ Include schema.sql in Docker image
   - ✅ Add scripts directory for rebuild functionality
   - ✅ Removed invalid COPY syntax that caused build errors
   - ✅ Database initialization happens at runtime, not build time

2. **Future Improvements (Phase 2)**
   - Optimize image size with multi-stage pruning
   - Add database migration support
   - Implement proper logging rotation
   - Add Prometheus metrics endpoint

### 📋 Testing Checklist

- [x] Docker build completes
- [x] Image runs without crashes
- [x] Health endpoint responds
- [x] Authentication works
- [x] Docker Compose deploys
- [x] Volumes persist data
- [x] Resource limits enforced
- [x] Graceful shutdown works
- [ ] Database initializes properly
- [ ] MCP tools function correctly
- [ ] Cross-platform compatibility (arm64/amd64)

## Next Steps

1. Apply fixes from Dockerfile.fixed
2. Test database initialization thoroughly
3. Verify MCP functionality with initialized database
4. Test multi-architecture builds in CI
5. Document troubleshooting steps

## Test Commands Used

```bash
# Build image
docker build -t n8n-mcp:test .

# Test stdio mode
echo '{"jsonrpc":"2.0","method":"tools/list","id":1}' | \
  docker run --rm -i -e MCP_MODE=stdio n8n-mcp:test

# Test HTTP mode
docker run -d --name test-http \
  -e MCP_MODE=http \
  -e AUTH_TOKEN=test-token \
  -p 3001:3000 \
  n8n-mcp:test

# Test with docker-compose
docker compose up -d
docker compose logs -f

# Health check
curl http://localhost:3000/health

# Test authentication
curl -H "Authorization: Bearer test-token" \
     -H "Content-Type: application/json" \
     -H "Accept: application/json, text/event-stream" \
     -d '{"jsonrpc":"2.0","method":"tools/list","id":1}' \
     http://localhost:3000/mcp
```