What now?

We explored, through a few examples, how to instrument our services and provide more detailed metrics than what we would be able to do through exporters. Early in the book, I said that we should use exporters instead instrumentation unless they do not provide enough information. It turned out that they do not. If, for example, we used an exporter, we would get metrics based on requests coming through the proxy. We would not be aware of internal communication between services nor would we be able to obtain response times of certain parts of the services we're deploying. Actually, HAProxy Exporter (https://github.com/prometheus/haproxy_exporter) does not even provide response times since the internal metrics it exposes is not entirely compatible with Prometheus and cannot be exported without sacrificing accuracy. That does not mean that HAProxy metrics are not accurate...