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DevOps & Automation · Intermediate

Chaos Engineering

The discipline of experimenting on a system by injecting controlled failures to build confidence in its resilience.

Definition

Teams form a hypothesis about steady-state behavior, inject faults such as instance termination, latency, or dependency failure, and observe the impact with a limited blast radius. Tools include Chaos Monkey, LitmusChaos, Chaos Mesh, AWS Fault Injection Service, and Azure Chaos Studio.

Example

AWS Fault Injection Service terminates 30% of instances in one AZ to verify auto-recovery.

Exam tip

Start small with a defined blast radius and steady-state hypothesis; random production chaos without monitoring is the wrong answer.

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