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Continuous Delivery: Reliable Software Releases through Build, Test, and Deployment Automation Hardcover – Jul 27 2010

5 out of 5 stars 2 customer reviews

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Product Details

  • Hardcover: 512 pages
  • Publisher: Addison-Wesley Professional; 1 edition (July 27 2010)
  • Language: English
  • ISBN-10: 0321601912
  • ISBN-13: 978-0321601919
  • Product Dimensions: 18.5 x 3.3 x 23.4 cm
  • Shipping Weight: 2.1 Kg
  • Average Customer Review: 5.0 out of 5 stars 2 customer reviews
  • Amazon Bestsellers Rank: #12,061 in Books (See Top 100 in Books)
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Product Description


“If you need to deploy software more frequently, this book is for you. Applying it will help you reduce risk, eliminate tedious work, and increase confidence. I’ll be using the principles and practices here on all my current projects.”

Kent Beck, Three Rivers Institute


“Whether or not your software development team already understands that continuous integration is every bit as necessary as source code control, this is required reading. This book is unique in tying the whole development and delivery process together, providing a philosophy and principles, not just techniques and tools. The authors make topics from test automation to automated deployment accessible to a wide audience. Everyone on a development team, including programmers, testers,  system administrators, DBAs, and managers, needs to read this book.”

Lisa Crispin, co-author of Agile Testing


“For many organizations Continuous Delivery isn’t just a deployment methodology, it’s critical to doing business. This book shows you how to make Continuous Delivery an effective reality in your environment.”

James Turnbull, author of Pulling Strings with Puppet


“A clear, precise, well-written book that gives readers an idea of what to expect for the release process. The authors give a step-by-step account of expectations and hurdles for software deployment. This book is a necessity for any software engineer’s library.”

Leyna Cotran, Institute for Software Research, University of California, Irvine


“Humble and Farley illustrates what makes fast-growing web applications successful. Continuous deployment and delivery has gone from controversial to commonplace and this book covers it excellently. It’s truly the intersection of development and operations on many levels, and these guys nailed it.”

John Allspaw, VP Technical Operations, and author of


The Art of Capacity Planning and Web Operations

“If you are in the business of building and delivering a software-based service, you would be well served to internalize the concepts that are so clearly explained in Continuous Delivery. But going beyond just the concepts, Humble and Farley provide an excellent playbook for rapidly and reliably delivering change.”

Damon Edwards, President of DTO Solutions and co-editor of


“I believe that anyone who deals with software releases would be able to pick up this book, go to any chapter and quickly get valuable information; or read the book from cover to cover and be able to streamline their build and deploy process in a way that makes sense for their organization. In my opinion, this is an essential handbook for building, deploying, testing, and releasing software.”

Sarah Edrie, Director of Quality Engineering, Harvard Business School


“Continuous Delivery is the logical next step after Continuous Integration for any modern software team. This book takes the admittedly ambitous goal of constantly delivering valuable software to customers, and makes it achievable through a set of clear, effective principles and practices.”

Rob Sanheim, Principal at Relevance, Inc.

From the Back Cover

Getting software released to users is often a painful, risky, and time-consuming process.

This groundbreaking new book sets out the principles and technical practices that enable

rapid, incremental delivery of high quality, valuable new functionality to users. Through

automation of the build, deployment, and testing process, and improved collaboration between

developers, testers, and operations, delivery teams can get changes released in a matter of hours—

sometimes even minutes-no matter what the size of a project or the complexity of its code base.


Jez Humble and David Farley begin by presenting the foundations of a rapid, reliable, low-risk

delivery process. Next, they introduce the “deployment pipeline, an automated process for

managing all changes, from check-in to release. Finally, they discuss the “ecosystem needed to

support continuous delivery, from infrastructure, data and configuration management to governance.


The authors introduce state-of-the-art techniques, including automated infrastructure management

and data migration, and the use of virtualization. For each, they review key issues, identify best

practices, and demonstrate how to mitigate risks. Coverage includes


• Automating all facets of building, integrating, testing, and deploying software

• Implementing deployment pipelines at team and organizational levels

• Improving collaboration between developers, testers, and operations

• Developing features incrementally on large and distributed teams

• Implementing an effective configuration management strategy

• Automating acceptance testing, from analysis to implementation

• Testing capacity and other non-functional requirements

• Implementing continuous deployment and zero-downtime releases

• Managing infrastructure, data, components and dependencies

• Navigating risk management, compliance, and auditing


Whether you're a developer, systems administrator, tester, or manager, this book will help your

organization move from idea to release faster than ever—so you can deliver value to your business

rapidly and reliably.


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Inside This Book

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Top Customer Reviews

Format: Hardcover
Agile practice states that if something hurts the remedy is to repeat until the pain goes away.

Humble's and Farley's work is about alleviating the discomfort associated with moving code from check-in to production and managing the following 3 degrees of freedom - branching, dependencies and the deployment pipeline. In showing us this new paradigm, which must be heavily supported by tools and automation, we are taught how to tackle the middleware components as well: binaries, configurations and data.

The book brought me back to Donald Knuth's vision and warnings made more than 40 years ago on anti-patterns vis-a-vis performance tuning. The authors remind us that there's nothing like Prod metrics to fine tune performance of the Prod environments.

If business governance and the imperative of delivering software are of paramount importance to you, this book is loaded with practical solutions, market knowledge and tips. It also contains a great maturity model and will introduce concepts like canary releasing and blue-green deployments.
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Format: Hardcover Verified Purchase
This is a piece I'll keep on my desk for a while, at least until my company transformation is complete.
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Most Helpful Customer Reviews on (beta) HASH(0xa1028498) out of 5 stars 73 reviews
67 of 71 people found the following review helpful
HASH(0xa12f0030) out of 5 stars Great nuggets lost in a repetitive bog Oct. 4 2011
By D. Golden - Published on
Format: Kindle Edition Verified Purchase
This book is packed full of great ideas, but it suffers from painful redundancy. In response to another review, an author claims that it was intentional, so that one could skip around without reading from cover to cover. My response to that is that they should have had better editors. I have read many technical books designed for skipping around. None were as tediously repetitive as this one. Eventually, one has to expect that the reader is going to read more than one chapter and might even remember something from a previous chapter and do them the courtesy of not belaboring the main points each time. It's not even limited to once per chapter. The repetition frequently continues within each chapter, section by section.

That said, there are some good gems inside. My favorite parts might be the many real-world stories of how things can go wrong or how applying some of the principles smoothed things out. The detail, diversity and verisimilitude of those anecdotes sets the book apart from many books in the field.

I wish I could say this was a "must have" book, but it's really more of a "must skim" sort of book.
42 of 51 people found the following review helpful
HASH(0xa12f027c) out of 5 stars How to deliver software to users at the click of a button Sept. 12 2010
By Paul M. Duvall - Published on
Format: Hardcover Verified Purchase
This is one of the most important software books published in years. From the beginning and throughout the book, the authors emphasize the importance in establishing one delivery team consisting of various experts throughout the software lifecycle - developers, DBAs, Systems/Operations, network specialists, testers and so on. The overarching pattern the authors describe is the Deployment Pipeline, which is basically a staged process consisting of all of the steps to go from bare/virtual metal to a working system whenever there is a change to source files. Of course, the only way this can be done is through copious amounts of automation. The other key point the authors make is that this automated delivery system - itself - is versioned with every change. Not just the custom source code, but also the operating system(s), tools, configuration and everything necessary to create a working software system - a crucial aspect of the Deployment Pipeline.

To sum up key points from the book in a few bullets:

* The purpose of Continuous Delivery is to reduce the cycle time between an idea and usable software
* Automate (almost) everything necessary to create usable software
* Version complete software systems (not just source code) for every change committed to version control system
* Employ a Deployment Pipeline in which the entire system is recreated whenever a change is committed to the version-control system and provide continuous feedback
* Identify one delivery team consisting of various delivery experts - build, deploy, provisioning, database, testing, etc. - a concept emphasized in the DevOps movement

The authors go into great detail in describing each of these themes. So, if you want the process of delivering software to any target environment - including production - to be a click of a button and something that can be accomplished as often as the business requires, get this book. When you employ the practices in this book, no longer will you need to artificially throttle changes delivered to users for months or even years because of the expense and risk required to deliver software.
11 of 12 people found the following review helpful
HASH(0xa12f0240) out of 5 stars Delivering value continuously is an achievable reality Oct. 18 2013
By Bas Vodde - Published on
Format: Hardcover Verified Purchase
Continuous Delivery from Jezz Humble and David Farley is an important contribution to the field of software development. It takes continuous integration to the logical conclusion and covers how to set up a continuous integration system which covers everything from check-in to delivery to production. It doesn't state you have to deliver directly in production, but it will explain how technically it is achievable to do that and what enormous benefits this brings to your organization.

Continuous delivery consists of three parts: 1) Foundation, 2) Deployment Pipeline, and 3) Delivery Ecosystem

The first four chapters cover the fundamentals the rest of the book is based on. The first chapter provides some problems with more traditional approaches and also introduces some principles extracted out of continuous delivery. The next three chapters cover topics that provide the basics of continuous delivery. Someone involved with agile development for a while is probably aware of most of this and it will be a quick read. For new people, these chapter provide a quick introduction to these topics so that you can understand the rest of the book. The chapters are: "configuration management," "continuous integration," and "implementing a testing strategy."

The second part is the core of the book. It explains the continuous delivery pipeline. This pipeline is a series of stages (a series of continuous integration systems) each stage covering higher-level wider-range of testing so that the confidence in the product increases the later the stage in the deployment pipeline passes. The stages the authors recommend in the deployment pipeline are: commit, acceptance, capacity, manual, production. Each of these stages (except for manual) has its own chapter which explains tools and practices that the authors have found useful in that stage of the deployment pipeline. The part also contains an additional 'foundation' chapter about build and deployment scripting.

The last part of the book is one that I myself found most interesting which covers perhaps some 'advanced' topics. The part is called "delivery ecosystem" and the chapters aren't directly related to each other but each chapter covers a common topic related to the deployment pipeline. Chapter 11 talks about managing and automating your infrastructure as part of your build also. It introduces a vast amount of topics related to automation (pupper, chef), virtualization, cloud computing and monitoring. Unfortunately, the book is only able to touch a little upon each of these topics as each of them could easily fill several others books (and they do!). Chapter 12 covers a very frequent problem in testing and test automation related to managing data. It explains several different approaches and then evaluates them and shares the experiences and recommendations of the authors. Managing test data is a common problem and is rarely covered in the amount of detail as this book does. Chapter 13 discusses different scaling options by componentizing the product and what effect this has on the continuous deployment pipeline (basically adding another dimension to the pipeline). Chapter 14 is about version control and can be summarized as "avoid branching" but the authors do a good job explaining that message and why the alternatives are indeed worst. Chapter 15 was a short (and I slightly disliked this chapter) about managing continuous delivery. It felt like the standard "and now... what actions to take"-chapter. It was a bit shallow though.

When the book was published, I read it through rather quickly and liked it but didn't appreciated the depth of the book yet. I re-read it the second time more thoroughly and enjoyed the careful comparisons and explanations of the recommendations of the authors. They shared the experiences they have had very clear. The book is interesting to me as it covers a vast area and thus it is hard to not touch everything shallowly, but they don't, they go in more depth at the points where the authors feel it is appropriate (for example, parts that are controversial or often done differently).

The book isn't perfect though! As some other reviewers pointed out, it is repetitive and should have been thinner. I agree with that. Also, sometimes the book side-tracks in interesting facts that are unlikely to help the reader a lot such as the history of version control. Next, the book contains some very basic things that could have perhaps been left out (or put as appendix), such as an explanation of maven. My last comment is that the book sometimes contradicts itself such as the recommendation to do things "at the beginning of the project" but then later stating that "at the beginning of the project, all these decisions will change". There I still felt the influence of standard 'project' thinking.

With all these drawbacks, I still decided to rate the book five stars because I do think it is an very influential and important book. It tells and *shows* that continuous delivery is not just a perfection state but that it can be achieved today. Not only that, it can be achieved in larger projects, not just small web projects. This is a huge contribution to the industry and I think and hope that the practices of continuous delivery will become standard practices everywhere. Excellent read (except for the repetition) and highly recommended.
93 of 121 people found the following review helpful
HASH(0xa12f0534) out of 5 stars barely ok and too repetitive Jan. 25 2011
By Augusto - Published on
Format: Hardcover
I found the book extremely repetitive, to the point that after the 4th chapter I started skimming through it, as there's no point in reading it all. I don't know if the idea is to repeat phrases until the reader buys into them, or what. I'm quite disappointed that Martin Fowler put his signature on this book. Maybe they're a big happy family at Thoughtworks ... and hey, they need to make money out of Go.

I don't rate this book as just 1 star, as it has some good ideas, but it could have been written in 150 pages (max) rather than 450. Some of the concepts that are repeated until boredom are:
- Don't build the binaries at each stage of the deployment pipeline, create them once an reuse them.
- The capacity testing environment should be as similar as possible to the production environment.
- Script everything!
- Don't let builds that fail unit or acceptance test into production
- Put all the configuration in version control (network, firewall, OS, etc)

I also found the book more directed to manager who don't really know or care about the technology, but want to talk "in techie" language to their engineers. There are too few examples of how to use technology to build a deployment pipeline and most of the talk stays at a very abstract level.

My bottom line, I strongly suggest to read some blog posts and watch some presentations (check infoq) about this subject, it takes less time and it's more enriching than reading this book.
11 of 13 people found the following review helpful
HASH(0xa12f0a38) out of 5 stars A very important contribution Sept. 12 2010
By Michael Huettermann - Published on
Format: Hardcover
My first impression was, as the book title suggests, that the book is strictly focused on delivery of software, delivering continuously, to add value to the system and to satisfy the customer (all changes should satisfy the customer and should add value!). That is one crucial aspect for sure. But it is also possible to "deliver continuously" by just throwing changes to production randomly, in bad quality. Thus a systematic process of staging of software is crucial, and introducing (how I call it) "Quality Gates" is essential for releasing software quickly and in best quality.

Continuous Delivery advocates a closer collaboration between all stakeholders that are involved in the software development process. It delivers a holistic approach to software engineering. The book underlines the importance of aspects like Continuous Integration, acceptance testing and component repositories, and discusses many common and valuable best practices. It discusses questions that are relevant for different project phases and stakeholders. The book delivers the authors' views and opinions in a very informative way.

The book does not discuss all possible questions along all development phases (just not possible). It assigns priorities where, in some cases, you may miss another controversal aspect of the discussion (e.g. in the context of "keep absolutely everything in version control"). The pragmatic discussion of "configuration management" will be helpful for many teams, though. In other cases, you may miss another hint or little step. One example for that is in the context of "meaningful commit messages". Here, the potential of task-based development is not really illustrated, maybe because due to the next fact: The book does not (or rarely) show how to implement the strategies with tools. Some sections illustrate tools. Because it is not possible to cover all build tools for all different languages and platforms in one book, such sections give you a nice first impression, though. But for me, these sections are optional for such a book, for a book that is platform/language agnostic. These points are not disadvantages or drawbacks, you should just now them. As always, you should read the Preface first, to understand what this book is, and what it is not. Such a great book cannot cover every single aspect. And there are books like "Agile ALM", which assign other priorities, add other aspects to the discussion and are more targeted to a specific platform/audience (Java/JEE).

Continuous Delivery illustrates an approach that "all code changes are entering a pipeline" to production. I like this nice metaphor for promoting software, staging artifacts from the development team to the final release in production. Some people may claim that this is part of "release management", others may say it is similar to Continuous Integration, and "Continuous Deployment" (deploying versions to production, and to test machines before, continuously). - In my opinion, a change may result in a release *potentially* and *may* start the whole process. And: no changes to the production system without any process; most of the changes will be staged along the full way. The process and the infrastructure must enable the team to promote every single change to production, if you want to do that, however.

Additionally, I think that you should take special care of linking all artifact types to consistent releases, and that you should realize the "pipeline" not as something like a "fire-and-forget" tube. In my opinion, development phases are connected and integrated, and in most cases, it is (hopefully) more an integrated lifecycle, something like a pipline, where both ends of the cube are connected with each other.

Continuous Delivery is a very important contribution. I recommend the book to everyone involved in software engineering.