Summary

Recap

In this final chapter, we learned about monitoring and observability. We were introduced to the OpenTelemetry library and learned about its goals of making applications observable easier. We also learned about distributed tracing and how it is one of the three pillars of observability.

Later, we added distributed tracing and metrics to the application using OpenTelemetry and Prometheus. With a little work, both forms of instrumentation were added to the application. To demonstrate this new instrumentation, we used a small application to simulate users making requests while we were free to view the recorded data in either Jaeger or Prometheus.