Chaos Engineering

## "Breaking Things on Purpose" **Chaos Engineering** is the discipline of experimenting on a system to build confidence in its capability to withstand turbulent conditions. ### The Scientific Method It is not just "breaking stuff." It follows a process: 1. **Hypothesis**: "If we kill the checkout service, the site will still serve the homepage." 2. **Experiment**: Kill the checkout service. 3. **Observation**: Did the homepage load? Or did the whole site crash? 4. **Learning**: Fix the dependency. ### Principles * **Minimize Blast Radius**: Don't take down the whole site. Start with 1% of users. * **Stop Button**: Always have a big red button to stop the experiment instantly. * **Production**: Staging is not Production. Eventually, you must test in Prod.