A common architectural design pattern these days is to break up an application monolith into smaller microservices. Each microservice is then responsible for a specific aspect or feature of your app. For example, one microservice might be responsible for serving external API requests, while another might handle data fetching for your frontend.
Designing a robust and fail-safe infrastructure in this way can be challenging; monitoring the operations of all these microservices together can be even harder. It's best not to simply rely on your application logs for an understanding of your systems' successes and errors. Setting up proper monitoring will provide you with a more complete picture, but it can be difficult to know where to start. In this article, we'll cover service areas your metrics should focus on to ensure you're not missing key insights.