Understanding the Prometheus Query Language is essential to be able to perform insightful dashboarding, capacity planning, and alerting. But for that, we need to begin by learning the basics. The following topics will cover the components that available to construct queries and look into how they behave together.
Getting to know the basics of PromQL
Selectors
Prometheus is designed to handle hundreds of thousands of time series. Each metric name can have several different time series, depending on the combination of labels; querying the right data can look difficult, or even downright perplexing, when similarly-named metrics from different jobs are mixed together. In Prometheus, a selector refers to a set of label matchers...
