The Anatomy of Continuous Deployment at Scale
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Envato runs one of the world’s highest traffic websites, Themeforest.net, which is 1 of the 8 sites served by a 2-sided e-commerce platform called Envato Market. The Envato Market engineering team juggles serving around 30,000 requests per minute whilst automatically deploying changes once every 30 minutes across a team of 50 developers that contribute to the one codebase. This presentation describes how we do this and what our the foundational engineering and organisational practices require to pull this off.
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The Anatomy of Continuous Deployment at Scale
- 1. The Anatomy of Continuous Deployment At Scale John Viner (Development Manager) CTO Summit 2016
- 3. We run a two-sided Marketplace for creative assets that has paid out $450 million to our “Authors” in the last 10 years 7 million registered users 10 million items for sale The Business
- 4. 25,000 requests a minute 160m Page Views a Month 1 sale a second at Peak 120,000 lines of code (Ruby on Rails) 25,000 tests 75 contributors, 10 years old The Tech
- 5. Continuous Deployment vs Continuous Delivery “Continuous Delivery is a software development discipline where you build software in such a way that the software can be released to production at any time.” “Continuous Deployment is a software development practice in which every code change is deployed to production, automatically.”
- 6. Foundational Engineering Capabilities Visible Operational Monitoring Feature Toggle Tooling Rollback Capability Automated Build and Deploy Toolset Comprehensive Automated Test Suite Quality Code Continuous Deployment
- 7. Foundational Organisational Behaviours MTTR Focus No QA / Approval Gates Access to Production Blameless Post Incident Reviews Developers on First Line Support Pairing and/or Peer Review Continuous Deployment
- 8. The Lifecycle of a Change at Envato Pull Request (PR) for all changes - Github Developer Merges PR with at least 1 review Automated Tests executed (no perf tests) - Buildkite Automated Deploy executed on passed test - Samson + CodeDeploy Rolling Deploy of Application with Zero Downtime Schema Migrations with Zero Downtime
- 10. Communication
- 11. The Numbers for June 2016 ~ 40 developers 3000 total builds (2.5 builds p/dev/day) 500 Pull Requests Closed 400 deployments (20 p/day, 0.5 p/dev/day, peak 25 per day) 4.5 hour cycle time (from first commit to deploy - working hours) 8000 deployments in the last 2 Years Pull Request Size - 37 lines changed , 3 files changed
- 12. Scaling the Team
- 13. Myths Dispelled Continuous Deployment is only for: • Small Teams • Small Scale • Low Commercial Impact of Outage
- 14. The Benefits for Envato 1. Reduced Risk. • Small Changes are Easier to Identify and Rollback (or forward) 2. Increases Speed to Market • Small Batch Efficiency - Faster Throughput 3. Increases Developer Happiness • Code in Production makes for happy devs • Supporting Production increases empathy with customer
- 15. How to Get Started • Start on a Small System • Encourage a Culture of Developer Ownership • Invest in Test Automation • Automate Your Build and Deployment Pipeline • Invest in Feature Toggles • Measure Your Cycle Time • Optimise for Mean Time to Recovery (not Failure)
- 16. Thank you!