Deploying Changes to Production in the Age of the Microservice

Thursday, 31 August 2017 - 9:00am9:50am

Samantha Schaevitz, Google

Abstract: 

You decoupled your APIs from their implementations and put them behind RPC interfaces. You build and deploy services independently. You code health is impeccable. You put your user data in a persistent, replicated, and consistent store, where it belongs. Your developer velocity has skyrocketed.

Now we have new problems. We’ve got N independent services with M edges of interaction between them. That’s N services that need to be built, tested, and deployed on the infrastructure that expected you to have one service whose mess of entanglement was a secret you had with the compiler.

How do we deploy N binaries with N sources of static configuration and M sources of runtime configuration safely without losing our collective minds? In this talk, I’ll share some of how we grew that aforementioned N from 1 to many in Gmail. Specifically:

  • Consistent naming schemas for services, environments -
  • Maintaining lightweight, easy-to-change production configuration abstraction layers
  • Release early, often
  • Canary everything by sharding into more A/B environments than you'd think you’d need 
  • Encourage backwards compatibility in all APIs 
  • Validate and test all configuration before changing global state

And, of course, some of things we (Gmail) learned by breaking things along the way.

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BibTeX
@conference {205506,
author = {Samantha Schaevitz},
title = {Deploying Changes to Production in the Age of the Microservice},
year = {2017},
address = {Dublin},
publisher = {{USENIX} Association},
}