Overview

""Serverless"" and ""event-driven"" are not magic. They are not invincible. We have traded the visible complexity of the monolith for the hidden fragility of distributed ""black box"" services. In this new world, a single, silent latency spike in one function can trigger a cascading, system-wide outage. Our traditional test suites are completely blind to this new class of failures. How can you be certain your ""resilient"" multi-AZ architecture will actually work when the platform itself fails? This book provides the answer. Event-Driven Chaos is not a theoretical overview; it is a hands-on, practical playbook for professional developers, cloud engineers, and Site Reliability Engineers who are no longer willing to just hope for resilience. This is your guide to proving it. Moving from SRE principles to code-level execution, this book teaches you the science of chaos engineering as applied to modern cloud-native systems. You will learn to wield the two essential tools of the trade: Gremlin as the ""surgical scalpel"" for application-level faults, and Chaos Mesh as the ""platform hammer"" for infrastructure-level failures. Through dozens of practical examples, code snippets, and YAML configurations, you will master the craft of deliberate, controlled failure: Hunt the Silent Killer: Learn why latency is more dangerous than an error. You will surgically inject precise network delays to find your system's true breaking points and empirically validate your timeouts, retries, and exponential backoff-with-jitter logic. Embrace the Hard Break: Master the difference between a transient 503 and a permanent 400 error. You will inject these faults to test your retry logic, prove your ""poison pill"" handling, and ensure your Dead-Letter Queues (DLQs) function as designed. Survive the Platform Betrayal: Stop trusting your architecture diagrams. You will use Chaos Mesh to simulate the failures you've only read about-from ""noisy neighbor"" CPU contention and random pod kills to running a full-scale, ""AZ Down"" GameDay. Build an Unbreakable Culture: Learn to embed chaos into your CI/CD pipeline, transforming resilience from a ""once-a-year"" event into a ""per-commit"" automated test. We will cover the human element of running blameless, effective GameDays that make your team as resilient as your code. Stop guessing if your system will hold up. This book will give you the tools, the patterns, and the confidence to find your weaknesses long before your customers do, and build the truly unbreakable event-driven systems of the future.

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