Observability

It is the ability to understand and analyze what is happening inside a system based on the information available externally

• Enables system operators to gain insights into how a system is functioning
• Observability is not monitoring
• Uses data from; logs, metrics, traces, and events.
• Logs – application logs and system logs.
• Logs – provide insights into system behavior to identify errors and issues
• Metrics – tracks specifics aspects of the system’s performance or behavior over time
• Metrics – CPU, memory, response time, error rates, health status, etc.
• Traces – captures the end-to-end flow of requests through a distributed system
• Traces – uses timestamps at different points
• Traces – helps to identify bottlenecks and performance issues
• Observability should be in every architectural design