Monitoring is the key to the successful operation of any software service, but commercial solutions are complex, expensive, and slow. Why not do it yourself with open source? We’ll show you how to build simple, cost-effective, fast monitoring for practically any system using ClickHouse and Grafana. First, we introduce key elements of your monitoring solution: ingest, query, and visualization. We then dig into an example system showing how to store data efficiently, build queries, and create operational dashboards. Any developer can do it–join us to find out how!