By Jez Humble, David Farley

Winner of the 2011 Jolt Excellence Award!

Getting software program published to clients is usually a painful, dicy, and time-consuming process.

This groundbreaking new publication units out the foundations and technical practices that enable

rapid, incremental supply of top of the range, beneficial new performance to clients. Through

automation of the construct, deployment, and checking out method, and superior collaboration between

developers, testers, and operations, supply groups can get adjustments published in a question of hours—

sometimes even minutes–no subject what the scale of a undertaking or the complexity of its code base.


Jez Humble and David Farley commence by means of proposing the principles of a fast, trustworthy, low-risk

delivery technique. subsequent, they introduce the “deployment pipeline,” an automatic procedure for

managing all adjustments, from check-in to unlock. eventually, they speak about the “ecosystem” wanted to

support non-stop supply, from infrastructure, facts and configuration administration to governance.


The authors introduce state of the art suggestions, together with computerized infrastructure management

and facts migration, and using virtualization. for every, they assessment key concerns, establish best

practices, and show the right way to mitigate hazards. insurance includes


• Automating all features of creating, integrating, checking out, and deploying software

• imposing deployment pipelines at workforce and organizational levels

• bettering collaboration among builders, testers, and operations

• constructing gains incrementally on huge and disbursed teams

• enforcing an efficient configuration administration strategy

• Automating attractiveness checking out, from research to implementation

• trying out skill and different non-functional requirements

• enforcing non-stop deployment and zero-downtime releases

• dealing with infrastructure, info, elements and dependencies

• Navigating hazard administration, compliance, and auditing


Whether you’re a developer, structures administrator, tester, or supervisor, this booklet can help your

organization circulate from inspiration to liberate speedier than ever—so you could convey worth for your business

rapidly and reliably.


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Extra resources for Continuous Delivery: Reliable Software Releases through Build, Test, and Deployment Automation (Addison-Wesley Signature Series (Fowler))

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That's, those switch units must have a unmarried identifier, akin to a construct quantity or a model regulate swap set quantity, that references each piece. it may be attainable for a brand new workforce member to sit at a brand new pc, try out the project’s revision regulate repository, and run a unmarried command to construct and set up the appliance to any obtainable surroundings, together with the neighborhood improvement computing device. it may even be attainable to work out which construct of your quite a few functions is deployed into each one of your environments, and which types in model keep an eye on those builds got here from. If It Hurts, Do It extra usually, and convey the soreness ahead this is often the main basic precept on our record, and will maybe top be defined as a heuristic. however it is likely to be the main helpful heuristic we all know of within the context of offering software program, and it informs every thing we are saying. Integration is usually a very painful procedure. If this is often actual in your undertaking, combine whenever an individual assessments in, and do it from the beginning of the undertaking. If trying out is a painful procedure that happens ahead of free up, don’t do it on the finish. as an alternative, do it always from the start of the undertaking. If liberating software program is painful, target to liberate it at any time when an individual tests in a transformation that passes the entire automatic checks. when you can’t free up it to genuine clients upon each swap, unencumber it to a production-like setting upon each check-in. If developing program documentation is painful, do it as you increase new gains rather than leaving it to the top. Make documentation for a characteristic a part of the definition of performed, and automate the method so far as attainable. reckoning on your present point of workmanship, it may well take a significant quantity of attempt to arrive this objective, and naturally you continue to need to bring software program meanwhile. objective for intermediate targets, akin to an inner unencumber each few weeks or, if you’re already doing that, per week. progressively paintings to process the ideal—even small steps will carry nice benefits. severe programming is largely the results of utilising this heuristic to the software program improvement strategy. a lot of the recommendation during this booklet comes from our adventure of utilising an analogous precept to the method of liberating software program. ideas of software program supply construct caliber during this precept and the final one we point out during this section—continuous improvement—are shamelessly stolen from the tilt circulate. “Build caliber in” was once the motto of W. Edwards Deming who used to be, between his different differences, one of many pioneers of the tilt stream. the sooner you trap defects, the more affordable they're to fix. Defects are fixed such a lot cost effectively in the event that they are by no means checked in to model keep watch over within the first position. The options that we describe during this publication, similar to non-stop integration, accomplished computerized trying out, and automatic deployment, are designed to trap defects as early within the supply procedure as attainable (an software of the main “Bring the soreness forward”).

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