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Chaos Monkey is a tool to randomly turn off and on AWS EC2 instances. It is directly inspired by Netflix's account of such script used to make sure that their cloud infrastructure could handle failures. There wasn't a public version of it, so I made my own. It's a total hack made for The Next Web Hackathon, so you'll want to to poke around a bit before running it on anything. You'll probably at least need to change the AWS credentials and region.

Extending the monkey

There are a lot of ways Chaos Monkey could be improved:

  • Add more mischief for the monkey to do: connect to a server and kill processes, throttle network connections, etc. See the MischiefAction trait and the EC2Shutdown case class, the only class currently implementing it.
  • Add more targets: database servers, load balancers, etc. See the MonkeyTarget trait and the EC2Target class.
  • Specifying target machines. Right all the machines in the given region are targeted.
  • Better scheduling than Thread.sleep() and new Timer().schedule().
  • Track the state of targets so that one is not, for example, turned off while it is still off from a previous attack.
  • Better logging than the text to stdout (though I think it is still very funny =)

Credits

By Peter Robinett (@pr1001) of Bubble Foundry.

Released under the MIT license. See the LICENSE file for more.