Designing for Failure — The Chaos Engineering Mindset
Master circuit breakers, bulkheads, retry patterns, and Netflix's Chaos Monkey philosophy for building systems that embrace failure.
In 2011, Netflix did something that sounded insane: they wrote a program called Chaos Monkey that randomly killed production servers during business hours. On purpose. While customers were streaming movies.
The reasoning was profound. Netflix had moved to AWS and knew that cloud instances could fail at any time. Rather than hoping failures would not happen, they forced failures to happen on their terms, during working hours, when engineers were awake and could observe and fix problems. If a random server death caused an outage, they would rather discover that on a Tuesday afternoon than a Saturday night.
This philosophy — chaos engineering — is built on a counterintuitive insight: the way to build reliable systems is to break them deliberately and learn from what happens. Instea
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