Observabilité

Observabilité refers to the degree to which the internal state of a system can be inferred from knowledge of its external outputs. In the context of software systems, it's about understanding what's happening inside your application by examining the data it produces. This data typically includes logs, metrics, and traces. Logs provide detailed records of events, metrics offer numerical measurements over time, and traces track the path of a request as it moves through various components of a distributed system.

The goal of observabilité is to enable developers and operators to answer questions about the system's behavior, even for issues they haven't encountered before. It moves beyond traditional monitoring, which often relies on predefined dashboards and alerts for known problems. Observabilité allows for dynamic exploration and debugging of unforeseen issues.

Key benefits include faster incident response, improved performance tuning, and a deeper understanding of complex distributed architectures. By making a system's internal workings visible, observabilité helps teams build and maintain more resilient and efficient software. It is particularly crucial in modern microservices-based environments where complexity and interdependencies are high.