# Chaos Engineering

> Chaos Engineering & Fault Injection

- Skill: `j4flmao/chaos-engineering-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add j4flmao/chaos-engineering-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/j4flmao/chaos-engineering-3/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: j4flmao (https://skillmd.com/u/j4flmao)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/j4flmao/chaos-engineering-3

---

# Chaos Engineering & Fault Injection

## Core Architecture

Chaos Engineering is the discipline of experimenting on a software system in production to build confidence in its capability to withstand turbulent and unexpected conditions.

### 1. The Chaos Monkey
Pioneered by Netflix, Chaos Monkey randomly terminates EC2 instances or pods in production. The goal is to ensure that auto-scaling and fallback mechanisms actually work when infrastructure inevitably fails.

### 2. Blast Radius & Game Days
- **Blast Radius:** Always start small. Test on a single staging microservice before blowing up a production availability zone.
- **Game Days:** Scheduled events where engineers gather to manually trigger massive failures and practice incident response.

### Chaos Injection Map

```mermaid
%%{init: {"theme": "default", "flowchart": {"useMaxWidth": true}}}%%
flowchart TD
    subgraph Control ["Chaos Mesh / Gremlin"]
        A["Define Experiment (YAML)"]
        B["Inject Fault (Network Delay/Kill Pod)"]
    end
    
    subgraph Production ["K8s Production Cluster"]
        C["Service A (Healthy)"]
        D["Service B (Victim Pod)"]
        E["Service C (Fallback/Retry)"]
    end
    
    subgraph Monitoring ["Observability"]
        F["Check Error Rates & Alerts"]
    end
    
    A --> B
    B -->|"Terminate"| D
    C -->|"Request Fails"| D
    C -->|"Circuit Breaker / Retry"| E
    C -.-> F
```