Questions

1. What changes did we need to make to the source code in the microservices to make them produce metrics that are consumed by Prometheus?
2. What is the management.metrics.tags.application config parameter used for?
3. If you want to analyze a support case regarding high CPU consumption, which of the dashboards in this chapter would you start with?
4. If you want to analyze a support case regarding slow API responses, which of the dashboards in this chapter would you start with?
5. What is the problem with counter-based metrics such as Resilience4j’s retry metrics, and what can be done so that we can monitor them in a useful way?
6. What is going on here?

Figure 20.23: What is going on here?

If you are reading this with screenshots rendered in grayscale, it might be hard to figure out what the metrics say. So, here’s some help:

1. The state transitions reported by the circuit breaker are, in order:
   1. half_open...