Hands-On Software Engineering with Golang

Instrumenting Go code

In order for Prometheus to be able to scrape metrics from our deployed services, we need to perform the following sequence of steps:

1. Define the metrics that we are interested in tracking.
2. Instrument our code base so that it updates the values of the aforementioned metrics at the appropriate locations.
3. Collect the metric data and make it available for scraping over HTTP.

One of the key benefits of microservice-based architectures is that software engineers are no longer constrained by the use of a single programming language for building their services. It is quite common to see microservices written in Go communicating with other services written in Rust or Java. Nevertheless, the need to monitor services across the ...