Optimize Rails Asset Pipeline Deployment

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1. ASSET PIPELINE OPTIMIZATION by @huynhquancam
2. WHAT SHOULD YOU KNOW ABOUT THIS GUY? My name is Huynh Quan Cam. Responsible for the development and engineering of Dadadee.
3. WHAT’S THE TALK ABOUT? Rails Assets pipeline. Deploy assets pipeline on multiple servers. How to optimize the deployment?
4. ASSETS PIPELINE concatenate and minify or compress JavaScript and CSS assets. support pre-processors such as CoffeeScript, Sass and ERB. based on Sprockets.
5. USING ASSET PIPELINE
6. – The Rails core team. “TIPS OF THE DAY” You can get rid of sprockets by executing this command at the start. rails new my-awesome-app-without-sprockets --skip-sprockets
7. SITUATION we are deploying an Rails app to four servers: 2 web, 1 database and 1 worker. db and worker servers need static assets to work. zero-down time deployment and rollback required.
8. CAPISTRANO-RAILS capistrano-rails is a set of Capistrano tasks to automate Rails deployment. migrations. assets pre-compilation.
9. ORCHESTRATION SCRIPT
10. WHAT’S WRONG WITH THIS APPROACH? waste of time. waste of computing resources. waste of storage resources, especially when you’re using CDNs like CloudFront.
11. Can we only pre-compile once?
12. ASSET FINGERPRINTS generated based on file content. optimize client-side caching. better cache invalidation.
13. ASSET FINGERPRINT application.css application-908e25f4bf641868d8683022a5b62f54.css application.css application-723d1be6cc741a3aabb1cec24276d681.css
14. ASSET MANIFEST a manifest-<md5-hash>.json cache every fingerprint of your Rails static assets. accelerate Rails helper call.
15. ASSET MANIFEST
16. NOTES fingerprints only change if file contents change. fingerprints don’t change across servers. all fingerprint requests are handled by manifest file.
17. Pre-compile once and sync the manifest file to others.
18. IMPLEMENTATION
19. IMPLEMENTATION
20. QUESTIONS?
21. THANK YOU!