Verifying fault tolerance with Gameday exercises
This chapter contains recipes that should help you create more reliable, resilient microservice architectures. Each recipe documents a pattern or technique for anticipating and dealing with some kind of failure scenario. Our aim when building resilient systems is to tolerate failure with as little impact to our users as possible. Anticipating and designing for failure is essential when building distributed systems, but without verifying that our systems handle failure in the ways we expect, we aren't doing much more than hoping, and hope is definitely not a strategy!
When building systems, unit and functional tests are necessary parts of our confidence-building toolkit. However, these tools alone are not enough. Unit and functional tests work by isolating dependencies, good unit tests, for instance, don't rely on network conditions, and functional tests don't involve testing under production-level traffic conditions, instead focusing on various...
