let's release it - an intro to continuous delivery

a n i n t r o t o c o n t i n u o u s d e l i v e r y

LET’S RELEASE IT

Rouan Wilsenach @rouanw

thoughtworks.com

THE LAST MILEDoes this look familiar?

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Analysis & Design

Development

Test & Showcase

Release & Operations

‘Agile’ team

Centralised QA IT Operations

Integration & QA

Customer

The ‘last mile’Iteration 0 - 1 - 2 - 3 - n

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Test & Showcase

Delivery team

Customer

Constant flow of new features into production

PRINCIPLES OF CD

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Decouple release from deployment

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Done means released

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Small releases

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Build quality in

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If it hurts, do it more often

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Automate everything

BENEFITS OF CD

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Clarity

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Confidence

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Less stress

SHOW ME HOWBlah blah blah. How do we actually do this?

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AUTOMATE EVERYTHINGThe machinery to put code in production. All the time.

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Automated testing

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Production-like environments

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Automated deployments

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Automated infrastructure

BUILD PIPELINEThe production gauntlet

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Trigger the pipe on every change

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Fast feedback

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Build artefact

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The go button

TRUNK BASED DEVELOPMENTHow to code when everything is in production

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Put everyone’s changes together all the time

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Small changes

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User stories

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Keep out of reach of users

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Feature toggles

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Toggling tips

not too many short lived talk about them

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Branch by abstraction

WHAT GOES INThe other side of the pipe

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Release decisions

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Use feedback

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Measure cycle time

RECAPOnce more with feeling

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The last mile

Principles of CDBenefits

automate everything

build pipelinetrunk based dev

what goes in

How?

SOME RESOURCES

Continuous Integration:

• www.martinfowler.com/articles/continuousIntegration.html

• http://martinfowler.com/bliki/FeatureBranch.html

Trunk based development:

• http://martinfowler.com/bliki/FeatureToggle.html

• http://martinfowler.com/bliki/BranchByAbstraction.html

• http://continuousdelivery.com/wp-content/uploads/2011/05/branch_by_abstraction.png

Continuous Delivery

• http://www.thoughtworks.com/continuous-delivery

• http://martinfowler.com/bliki/ContinuousDelivery.html

• http://go.cd

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SOME RESOURCES

Jez Humble (@jezhumble)

• continuousdelivery.com

• CD Book: http://martinfowler.com/books/continuousDelivery.html

• Video on adopting CD: http://www.infoq.com/presentations/Adopting-Continuous-Delivery

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a n i n t r o t o c o n t i n u o u s d e l i v e r y

LET’S RELEASE IT

Rouan Wilsenach @rouanw

thoughtworks.com