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![feature toggles
Config File
[featureToggles]
wobblyFoobars: true
some.php
flightyForkHandles: false
<?if ($wobblyFoobars) {?>
... various UI elements
<?}?>
other.php
$fork_handle = ($featureConfig->isOn(‘flightlyForkHandles)) ?
new flightyForkHander(aCandle) :
new forkHandler(aCandle);
Stolen from Martin Fowler http://martinfowler.com/bliki/FeatureToggle.html
Tuesday, October 9, 12](https://image.slidesharecdn.com/continuousdeliverymaster-101005025444-phpapp01/75/Continuous-Delivery-41-2048.jpg)
Uploaded byJez Humble
Continuous Delivery
The document discusses concepts related to continuous delivery and deployment pipelines. It advocates building quality into software through automated testing and collaboration between developers, testers and operations teams. Continuous delivery aims to make software production-ready at any time by implementing configuration management, continuous integration, and automated testing in a deployment pipeline that provides feedback at every change. This reduces risk and enables frequent, reliable releases that are tied to business needs rather than operational constraints.
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Continuous Delivery
- 1. continuous delivery @jezhumble Berlin, 4 october 2012 http://thoughtworks-studios.com/ Tuesday, October 9, 12
- 2. agile 101 "Agile" team Analysis + Design Centralized QA IT Operations Development Integration + QA Release and operation Customer Testing + Showcase Iteration 0 1 2 3 4 The "last mile" Tuesday, October 9, 12
- 3. social disrupting traditional businesses http://code.flickr.com/ Tuesday, October 9, 12
- 4. releasing frequently 1. build the right thing Customer development Agile product development Eric Ries, “The Lean Startup” http://bit.ly/8ZoX5F Tuesday, October 9, 12
- 5. innovate You can't just ask customers what they want and then try to give that to them. By the time you get it built, they'll want something new. Steve Jobs Tuesday, October 9, 12
- 6. scientific method Ideas create hypothesis Learn Build deliver minimum viable product Data Code get feedback Measure (repeat) Eric Ries, “The Lean Startup” http://bit.ly/8ZoX5F Tuesday, October 9, 12
- 7. ask this question “How long would it take your organization to deploy a change that involved just one single line of code? Do you do this on a repeatable, reliable basis?” Mary and Tom Poppendieck, Implementing Lean Software Development, p59. Tuesday, October 9, 12
- 8. releasing frequently 1. build the right thing 2. reduce risk of release John Allspaw: “Ops Metametrics” http://slidesha.re/dsSZIr Tuesday, October 9, 12
- 9. optimize for mtrs Tuesday,October 9, 12
- 10. optimize for mtrs MTBF MTRS John Allspaw: “Building Resilience in Web Development and Operations” http://www.usievents.com/en/conferences/8-paris-usi-2011/sessions/968-john-allspaw Tuesday, October 9, 12
- 11. releasing frequently 1. build the right thing 2. reduce risk of release 3. real project progress Tuesday, October 9, 12
- 12. agile manifesto Our highest priority is to satisfy the customer through early and continuous delivery of valuable software Tuesday, October 9, 12
- 13. production-ready software Fast, automated feedback on the production readiness of your applications every time there is a change - to code, infrastructure, or configuration Tuesday, October 9, 12
- 14. continuous delivery Software always production ready Releases tied to business needs, not operational constraints Tuesday, October 9, 12
- 15. continuous delivery automation patterns and practices collaboration Tuesday, October 9, 12
- 16. ingredients configuration management continuous integration automated testing Tuesday, October 9, 12
- 17. Local Develop Workstation Mainline Server Build pull Build Build ✔ Done! push Tuesday, October 9, 12
- 18. Local Develop Workstation Everyone Commits Mainline Server Build To the pull Mainline Build Every Day Build ✔ Done! push Tuesday, October 9, 12
- 19. build quality in “Cease dependence on mass inspection to achieve quality. Improve the process and build quality into the product in the first place” W. Edwards Deming Tuesday, October 9, 12
- 20. different kinds oftesting Business facing AUTOMATED MANUAL Showcases Support programming Functional acceptance Usability testing tests Critique project Exploratory testing Unit tests Non-functional Integration tests acceptance tests System tests (performance, scaling, ...) AUTOMATED MANUAL / AUTOMATED Technology facing Diagram invented by Brian Marick Tuesday, October 9, 12
- 21. deployment pipeline an automated implementation of your system’s build, deploy, test, release process visibility feedback control Tuesday, October 9, 12
- 22. deployment pipeline Delivery team Version control Build & unit Automated User acceptance Release tests acceptance tests tests Check in Trigger Feedback Check in Trigger Feedback Trigger Feedback Check in Trigger Feedback Trigger Feedback Approval Feedback Approval Tuesday, October 9, 12
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- 25. reducing release risk automate provisioning and deployment ensure devs, testers and ops collaborate throughout Tuesday, October 9, 12
- 26. reducing release risk devops incrementalism decoupling deployment and release Tuesday, October 9, 12
- 27. devops culture automation measurement sharing Tuesday, October 9, 12
- 28. feature toggles blue-green deployments canary releases low risk releases are incremental dark launching production immune system Tuesday, October 9, 12
- 29. DEPENDENT SERVICE 1.0 1.1 Database Abstraction layer Abstraction layer STATIC CONTENT /static/1.1 APPLICATION /static/1.0 Router / Load balancer Interwebs Tuesday, October 9, 12
- 30. blue-green deployments Tuesday, October 9, 12
- 31. router web app DB server server server Tuesday, October 9, 12
- 32. v1.1 v1.1 v1.1 router web app DB server server server Tuesday, October 9, 12
- 33. v1.1 v1.1 v1.1 router v1.2 v1.2 v1.2 web app DB server server server Tuesday, October 9, 12
- 34. v1.1 v1.1 v1.1 router v1.2 v1.2 v1.2 web app DB server server server Tuesday, October 9, 12
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- 38. canary releasing Reduce risk of release Multi-variant testing Performance testing Tuesday, October 9, 12
- 39. immune system what if someone replaced your “buy” button with spacer.gif? T cells http://www.flickr.com/photos/gehealthcare/3326186490/ Tuesday, October 9, 12
- 40. release != deployment Tuesday, October 9, 12
- 41. feature toggles Config File [featureToggles] wobblyFoobars: true some.php flightyForkHandles: false <?if ($wobblyFoobars) {?> ... various UI elements <?}?> other.php $fork_handle = ($featureConfig->isOn(‘flightlyForkHandles)) ? new flightyForkHander(aCandle) : new forkHandler(aCandle); Stolen from Martin Fowler http://martinfowler.com/bliki/FeatureToggle.html Tuesday, October 9, 12
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- 45. enterprise governance risk management SOX, ITIL, COBIT segregation of duties change management auditing and compliance Tuesday, October 9, 12
- 46. people are thekey Get everyone together at the beginning Keep meeting Make it easy for everyone to see what’s happening Continuous improvement (kaizen) Tuesday, October 9, 12
- 47. questions @jezhumble | jez@thoughtworks.com http://continuousdelivery.com/ ThoughtWorks is hiring! http://jobs.thoughtworks.com/ Australia | Brazil | Canada | China Germany | India | Singapore | South Africa Uganda | UK | USA © 2012 ThoughtWorks, Inc. http://thoughtworks-studios.com/ Tuesday, October 9, 12