https://launchdarkly.com/blog/testing-in-production-the-netflix-way/

In June we focused our Test in Production Meetup around chaos engineering. Nora Jones, Senior Software Engineer at Netflix, kicked off the evening with a talk about how Netflix tests in production.

“Chaos engineering…is the discipline of experimenting on production to find vulnerabilities in the system before they render it unusable for your customers. We do this at Netflix through a tool that we call ChAP…[It] can catch vulnerabilities, and allows users to inject failures into services and prod that validate their assumptions about those services before they become full-blown outages.”