In the previous post, we covered monitoring basics, including Prometheus, metrics, and its most common use cases. If you’re just starting with Prometheus, I’d highly recommend reading the first part of this series. In this blog post, we will mainly see how to query Prometheus data. First, we will look into how to query the time series data with PromQL and its terms and try to apply its concepts to query the various metrics available within Prometheus. Let’s get started!

What is Prometheus Query Language (PromQL)?

PromQL is a DSL (domain-specific-language) that enables users to do aggregations, analysis, and arithmetic operations on metric data stored in the Prometheus’ database. It consists of various functions and operators to construct the query. Each query of PromQL is called an ‘expression’. The expression browser provides the interface to run these expressions.

#prometheus #infracloud #promql