Over the past few days, I’ve been working on integrating an open-source API management layer using Fusio (v5.2.3) to centralize and secure communication between our CRM and LLM-based applications.
🔍 Why Fusio?
Fusio provides a lightweight, flexible API gateway and management system with:
- Visual interface for API operations
- Built-in support for OAuth2, rate limiting, and request logging
- Schema-driven API design
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Real-time analytics & monitoring dashboards
It’s a great fit for internal service coordination, especially when you’re running microservices for systems like: -
Customer Relationship Management (CRM)
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Large Language Model (LLM) integration APIs
⚙️ What I Set Up
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🚀 API Gateway Layer between multiple services (CRM-Core, CRM-MatchMaker, LLM engine)
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🧩 Defined operations, actions, and routes inside Fusio to handle each microservice endpoint
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🔐 Centralized access control and token handling
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📈 Enabled real-time metrics for test coverage, error rate, usage per operation, and latency
🧪 Testing & Challenges
- ✅ Successfully simulated and monitored traffic between internal endpoints
- 🐛 Faced and fixed a persistent MySQL connection issue while spinning up the Fusio container (lesson: always verify DB port exposure + credentials in .env)
- 🔄 Used docker-compose to manage isolated services, with volume resets during setup retries
# Used this command combo to reset and re-run the setup
docker-compose down -v
sudo rm -rf ./db
docker-compose up -d
✅ What’s Next
Finalizing integration with the production application layer
Setting up WebSocket event streaming for real-time updates
Deploying Fusio on a cloud server for internal + external access
💡 Final Thoughts
Fusio is a powerful open-source tool that gives devs full control over API lifecycle management — without depending on heavy SaaS solutions. For internal microservice architectures, especially with real-time and AI-driven logic like CRM + LLM, it’s proving to be a great fit.
🧵 Stay tuned
next post will cover production deployment and runtime performance benchmarks.
Tags:
@backend @api @microservices @opensource @devops @crm @llm @fusio @pytutorial @docker
