Developing apps faster
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This document discusses how to develop PHP apps faster for the enterprise. It recommends automating deployment, implementing continuous integration and testing, and shifting testing left to catch bugs earlier. Automating infrastructure is also important to fully rebuild environments automatically after failures. Upcoming episodes will cover high availability, performance optimization, and other topics. Faster deployment cycles through automation can enable faster application development and feedback from users.
Developing apps faster
- 1. Building the perfect PHP app for the enterprise Episode 2 : Developing apps faster Maurice Kherlakian Twitter: @mkherlakian Email: maurice.kherlakian@roguewave.com
- 2. 2 Series overview Now: Developing apps faster September 28: Resolving problems and high availability Your reputation as a miracle worker is secure when using these principles to isolate faults, optimize scale, and synchronize sessions across clusters. October 12: Optimizing performance Keep users on your site by learning how to use background jobs and caching, measure performance, and make data-driven decisions.
- 3. Maurice Kherlakian Director of professional services Rogue Wave Software
- 4. 4 Enterprise PHP is mission-critical • Built securely • Delivers optimal performance + scale • Always on • Meets release timelines • Modernizes legacy business logic • Clear support path (production + LTS)
- 5. 5 What does deployment automation look like? • Amazon – 1 deployments/second - Werner Vogels. CTO Amazon • Etsy – 40 – 50 deployments/day • Netflix – highly automated deployments and testing (Simian Army) techblog.netflix.com/2016/03/how-we-build-code-at-netflix.html techblog.netflix.com/2013/08/deploying-netflix-api.html quora.com/How-fast-is-Netflixs-development-cycle-in-practice
- 6. Poll #1: At what frequency do you deploy? • Multiple times a day • Once a day • Once a week • Once a quarter • Once a year
- 8. 8 Faster deployment cycles benefits • Faster feedback from your end users • Faster development • More iterations • Better product overall Faster deployment cycles Faster application development =
- 10. 10 WaterGile anyone? • Teams within an organization subscribing to Agile methodology • Teams often isolated – entire company didn’t buy into Agile methodologies • Still gather requirements, but break the down into user stories
- 11. Poll #2: What development practice do you follow? • Waterfall principles • A combination f waterfall and Agile (WaterGile – AgileFall) • Mainly Agile principles
- 12. 12 You are always behind! • Technical debt keeps increasing
- 15. 15 You’ve just released a feature Add a map display of all available cars to rent in a 10 km radius Released to everyone Impact? Overload – servers down, root cause unknown PANIC!
- 16. 16 You’ve just released a feature to some users Add a map display of all available cars to rent in a 10 km radius Released to 20% of users Impact – compare with other 80% through app monitoring system Change in CPU consumption profiles for same amount of users Fix or turn feature off
- 17. 17 Tools that can help • Instrument your code – PHP feature toggle (qandidate-toggle - ) – release to a subset of users • Zend Server Monitoring – a complete solution to monitor the behavior of your application – so you will catch the 20% spike in CPU usage
- 18. 18 It’s working… ramp it up! Add a map display of all available cars to rent in a 10 km radius Released to 50% of users 10% more rentals per visitor on version with map Little to no change in performance Release to everyone
- 20. 20 It worked fine on dev! • Environment consistency
- 21. 21 Git Developer’s code for map feature C h e c k i n Package Packaged app (parametrized) Staging TEST Prod Rollback Packaging for release
- 22. 22 Tools that can help • VMs and consistency – Vagrant – Docker • Deployment – Zend Server (deployment) – AWS code deploy
- 24. 24 What is a CI server? • CI automates the various tasks of building, packaging, testing and deploying • If build breaks, up to developer that broke it to fix it • If build passes, it CAN go all the way to production
- 25. 25 A typical CI pipeline Git clone Composer install Unit test Package Deploy to test Functional test Deploy to Staging Deploy to prod Add a map display of all available cars to rent in a 10 km radius
- 26. 26 Failure! Git clone Composer install Unit test FAIL Build 783 failed Add a map display of all available cars to rent in a 10 km radius
- 27. 27 Tools that can help
- 28. Poll #3: Do you use a CI server? • Yes • No
- 29. Demo
- 31. 31 Testing at different stages • Unit testing • Functional testing • Integration testing • Load testing Reference: techblog.netflix.com/search/label/Integration%20Testing
- 32. 32 Cost of bug fixing Stefan Priebsch – Advanced OOP and design patterns Credit: Stefan Priebsch
- 33. 33 Test early, test often!
- 34. 34 Add a map display of all available cars to rent in a 10 km radius Simulate a browser request and ensure that a map loads, and that the map has the number of vehicles available for rent Functional getCars($criteria, $radius) $map->plotCoordinates($cars) $modelView->assign(‘map’, $map) Unit Load 1,000 concurrent search requests for cars from 1000 different locations Load
- 35. Poll #4: Do you unit test? • Yes • No
- 36. 36 Tools that can help • ab, Jmeter, LoadRunner • PHPUnit • Behat – Mink • PHPspec
- 38. Poll #5: Do you use a framework? • Yes • No
- 39. 39 Evolution of frameworks • Component frameworks • MVC out, middleware in • Microservices architecture
- 40. 40 Tools that can help So many… • Zend Framework: ZF3, Expressive, Apigility • Laravel, Symfony, Yii, and many more
- 41. Writing code and left shifting
- 42. 42 Catch bugs early • Remember how a bug in prod can cost as much as 15X times the cost of a bug in development?
- 43. 43 How do you catch bugs early? • Test early, test often – when developing, test locally before committing • Peer reviews • Code instrumentation tools
- 44. What about hardware and infrastructure?
- 45. 46 Infrastructure should also be automated • Automate server provisioning • Source control your environment configurations • The goal is to fully rebuild an environment automatically in case of failure
- 46. 47 Another example – dealnews.com • In the past 2 weeks – Deployed web application 64 times – average 6.5 times a day – Deployed configuration management changes 12 times – Deployed MySQL schema changes 13 times - Courtesy of Brian Moon
- 47. Q&A
- 48. 49 Learn more • Watch this webinar on demand • Read the recap blog to see the results of the polls and Q&A session
- 49. 50 Stay tuned September 28: Resolving problems and high availability Your reputation as a miracle worker is secure when using these principles to isolate faults, optimize scale, and synchronize sessions across clusters. October 12: Optimizing performance Keep users on your site by learning how to use background jobs and caching, measure performance, and make data-driven decisions.
- 50. Building the perfect PHP app for the enterprise Episode 2 : Developing apps faster Maurice Kherlakian September 14, 2016
Editor's Notes
- #7: At what frequency do you deploy? Multiple times in a day Once a day Once a week Once a month Once a quarter Once a year