I had a perfect server, it was so pretty and rock solid and so I named it Petra. It was perfect in every way, everything was configured and tuned just right, it had perfect 100% service record and 753 days of uptime. I've spent a lot of time and effort making sure it run so well. No other server in the company had been this good. But last night this evil monster crashed my server for no reason.
Chaos Monkey was developed specifically for AWS where it will randomly kill instances within an Auto Scaling Group. It is meant to run during the business hours when engineers are alert and can quickly react to discovered failures.
Members of the army would sow chaos through other means:
Other Monkeys are helpful and remove the weak members of the herd: