Prometheus is a popular tool for metrics ingestion and querying. In this post, we discuss some of its features, using PromQL for querying, and using Prometheus with Grafana for visualizations and Alertmanager for alerting.

This article describes the configuration management tool Ansible and some of its basic concepts. Then it discusses how to test Ansible code. Refer to the version chart below. It assumes familiarity with the concept of configuration management, programming, and testing.