Kolton Andrus on Gremlin’s Newly Announced SaaS Chaos Engineering Product and Running Game Days

| Podcast with Kolton Andrus Follow 0 Followers by Wesley Reisz Follow 10 Followers on Dec 22, 2017 |

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Gremlin is a Software as a Service that lets you plan, control and undo Chaos engineering experiments built by engineers with experience from Netflix, AWS, Dropbox and others. In this podcast Wes talks to Kolton Andrus about the Gremlin product and architecture and related topics such as running Game Days.

Key Takeaways

  • Chaos Engineering is about thoughtful, planed experiments. An example might be a Game Day where we get a group of engineers in a room and whiteboard out what can wrong, and then we run experiments to test our assumptions such as what happens when your log files fill up the disk.
  • In general the advice is to minimise your blast radius; start with the smallest thing that you can do that will teach you something about your system - a single instance, a single container - once you’ve got faith in that scale up and repeat.
  • Gremlin, which is based on the idea of chaos engineering or “resilience as a service” is now available as a product, with early customers including Twillio, Expedia, Confluent and Remind. There are open source alternatives but it’s the first enterprise product to our knowledge.
  • Examples of the Gremlins you can inject include things that consume resources (for example memory, CPU, disk-space, IO overhead), things that change the state of the host or the VM (kill processes, time travel such as a leap second or a clock skew, rebooting hosts and containers), and things that change the network (we can’t resolve DNS, the service is slow and so on).
  • The Gremlin client is written in Rust. Rust does deterministic memory management, and failure is a first class citizen in Rust the signatures in Rust have a result. The service is written in Java running on AWS, and the web interface is written in Ember.


Show notes will follow shortly


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