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Feature Toggles
By @leenasn
& Continuous Delivery
xTEAM
Familiar?
Building something nobody wants is the ultimate form of waste
~Eric RiesThe Lean Startup
Think about how long would it take you to deliver a change of one line of code within your
application to production
~Mary and Tom PoppendieckLean Software Development, An Agile Toolkit
“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.”
http://martinfowler.com/bliki/ContinuousDelivery.html
Deployment Pipeline
“Continuous integration (CI) is the practice, in software engineering, of merging all developer
working copies to a shared mainline several times a day.”
Mainline Development
Incomplete Features?
Feature Toggles
Configuration Files
● Deploy != Release● Avoid Rollback Hells
Release Toggles
● A/B Testing● Canary Releasing
Experimental Toggles
Ops Toggles● Designing for failure● Manage Circuit Breakers
Architecture?
https://martinfowler.com/bliki/BranchByAbstraction.htmlBranch by Abstraction
https://continuousdelivery.com/implementing/architecture/
Strangler Pattern
The Dark Side
$$ Question
How to manage it?
Expiry Date
Cathedral
VsBazaar
Story 1
http://www.multunus.com/portfolio/end-end-mobile-device-management-solution-health-media-enterprise/
http://www.multunus.com/portfolio/end-end-mobile-device-management-solution-health-media-enterprise/
http://www.multunus.com/portfolio/end-end-mobile-device-management-solution-health-media-enterprise/
Stats
Released to 1 clinic Automated the Device Setup
Extended to Linux Media Players
Story 2
Manual + Some Automation
http://www.multunus.com/portfolio/micro-loan-processing-platform/
First release of the product
- Close to 4 million worth of loans till date
- An average of 4 loan officers
Summary
Work in small batches
http://cnmnewz.com/wp-content/uploads/2014/06/Golden-Gate-Bridge-with-Net-AP.jpg
Leena S N@leenasn / leena.sn@multunus.com
http://bit.ly/multunus-handbook
http://martinfowler.com/articles/feature-toggles.htmlhttps://continuousdelivery.com/https://trunkbaseddevelopment.com/http://www.multunus.com/blog/2016/03/merge-hells-feature-toggles-rescue/http://www.multunus.com/blog/2013/06/github-workflow-vs-mainline-development/https://www.youtube.com/watch?v=bbWFCKGhxOshttps://www.youtube.com/watch?v=6Q0mtVnnthQhttps://www.infoq.com/presentations/financial-services-devopshttps://www.infoq.com/presentations/CIM-continuous-delivery
References
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