I use PromQL regularly at work, and when I was getting started years ago, I found that the docs gave me more questions than answers (though they may have improved since then). I created these docs for my work, but since they don't contain any sensitive data, I decided to make them public. Let me know if you find them helpful.

The tutorial uses Docker to quickly set up an environment where metrics are already being scraped. This allows you to start writing PromQL queries right away and see immediate results.

Feel free to check it out and share your feedback: https://kubernetestraining.io/blog/prometheus-query-language-promql-tutorial