Summary

This chapter delved into the crucial aspects of monitoring and logging in microservices architecture, emphasizing the importance of observability in maintaining the health and performance of distributed systems. We began by explaining how observability provides deep insights into system behavior through key components such as logs, metrics, alerts, and traces.

We then shifted focus to the importance of logging in microservices, which is essential for capturing detailed records of system events, identifying performance bottlenecks, and diagnosing issues in real time. We explored different log levels—error, warning, info, debug, and trace—and discussed how they help categorize log messages based on severity, making troubleshooting more efficient. Additionally, the chapter covered popular logging libraries in Node.js such as winston and morgan.

Following the theoretical foundation, we demonstrated how to implement logging in a real-world scenario by integrating...