Continuous Delivery

Continuous Delivery Jez Humble @jezhumblehttp://thoughtworks-studios.com/

agile 101 "Agile" team Analysis + Design Centralized QA IT Operations Development Integration + QA Release and operationCustomer Testing + Showcase Iteration 0 1 2 3 4 The "last mile"

web 2.0disrupting traditional businesses http://code.flickr.com/

releasing frequently1. build the right thing Customer development Agile product development Eric Ries, “The Lean Startup” http://bit.ly/8ZoX5F

innovate You cant just ask customers what they want and then try to give that to them. By the time you get it built, theyll want something new.Steve Jobs

scienti c method Ideascreate hypothesis Learn Builddeliver minimumviable product Data Codeget feedback Measure(repeat) Eric Ries, The Lean Startup

ask this question“How long would it take yourorganization to deploy a changethat involved just one single lineof code? Do you do this on arepeatable, reliable basis?” Mary and Tom Poppendieck, Implementing Lean Software Development, p59.

releasing frequently1. build the right thing2. reduce risk of release John Allspaw: “Ops Metametrics” http://slidesha.re/dsSZIr

releasing frequently1. build the right thing2. reduce risk of release3. real project progress

agile manifestoOur highest priority is to satisfythe customer through earlyand continuous delivery ofvaluable so ware

production-ready so wareFast, automated feedback onthe production readiness ofyour applications every timethere is a change - to code,infrastructure, or con guration

continuous delivery Customer Delivery team Constant ﬂow of new features into productionSo ware always production readyReleases tied to business needs, notoperational constraints

continuous deliveryautomationpatterns and practicescollaboration

ingredientscon guration managementcontinuous integrationautomated testing

LocalDevelop Workstation Mainline Server Build pull Build Build ✔ Done! push

LocalDevelop WorkstationEveryone Commits Mainline Server Build To the pull Mainline Build Every Day Build ✔ Done! push

build quality in “Cease dependence on mass inspection to achieve quality. Improve the process and build quality into the product in the rst place” W. Edwards Deming

diﬀerent kinds of testing 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

deployment pipelinean automated implementation of yoursystem’s build, deploy, test, release processvisibilityfeedbackcontrol

deployment pipelineDelivery 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

deployment pipeline

reducing release riskdevopsincrementalismdecoupling deployment and release

devops culture automationmeasurement sharing

feature togglesblue-green deployments canary releaseslow risk releases are incremental dark launching production immune system

DEPENDENT SERVICE 1.0 1.1 Database Abstraction layer Abstraction layerSTATIC CONTENT /static/1.1 APPLICATION /static/1.0 Router / Load balancer Interwebs

blue-greendeployments

router web app DB server server server

v1.1 v1.1 v1.1router web app DB server server server

v1.1 v1.1 v1.1router v1.2 v1.2 v1.2 web app DB server server server

release !=deployment

feature toggles Con g File[featureToggles]wobblyFoobars: true some.phpflightyForkHandles: 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

Dark Launching

enterprise governancerisk managementSOX, ITIL, COBITsegregation of dutieschange managementauditing and compliance

people are the keyinceptions, showcases, retrospectivesrotate people, share the painbig, visible displayscontinuous improvement (kaizen)

Continuous Delivery

by Jez Humble on Oct 05, 2010

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Continuous Delivery — Presentation Transcript