Continuous Delivery

Dave Farley has been having fun with computers for nearly 30 years. Over that period he has worked on most types of software, from firmware, through tinkering with operating systems and device drivers, to writing games, and commercial applications of all shapes and sizes. He started working in large scale distributed systems about 20 years ago, doing research into the development of loose-coupled, message-based systems - a forerunner of SOA. He has a wide range of experience leading the development of complex software in teams, both large and small, in the UK and USA. Dave was an early adopter of agile development techniques, employing iterative development, continuous integration and significant levels of automated testing on commercial projects from the early 1990s. He honed his approach to agile development in his four and a half year stint at ThoughtWorks where he was a technical principal working on some of their biggest and most challenging projects. Dave is currently working for the London Multi-Asset Exchange (LMAX), an organization that is building one of the highest performance financial exchanges in the world, where they rely upon all of the major techniques described in this book.Jez Humble has been fascinated by computers and electronics since getting his first ZX Spectrum aged 11, and spent several years hacking on Acorn machines in 6502 and ARM assembler and BASIC until he was old enough to get a proper job. He got into IT in 2000, just in time for the dot com bust. Since then he has worked as a developer, system administrator, trainer, consultant, manager, and speaker. He has worked with a variety of platforms and technologies, consulting for non-profits, telecoms, financial services and on-line retail companies. Since 2004 he has worked for ThoughtWorks and ThoughtWorks Studios in Beijing, Bangalore, London and San Francisco. He holds a BA in Physics and Philosophy from Oxford University and an MMus in Ethnomusicology from the School of Oriental and African Studies, University of London. He is presently living in San Francisco with his wife and daughter.

"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, Etsy.com 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 dev2ops.org "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.

• Foreword by Martin FowlerPrefaceAcknowledgementsAbout the AuthorsPart I Foundations1 The Problem of Delivering Software2 Configuration Management3 Continuous Integration4 Implementing a Testing StrategyPart II The Deployment Pipeline5 Anatomy of the Deployment Pipeline6 Build and deployment scripting7 Commit Testing Stage8 Automated Acceptance Testing9 Testing Non-Functional Requirements10 Deploying and Releasing ApplicationsPart III The Delivery Ecosystem11 Managing infrastructure and environments12 Managing Data13 Managing components and dependencies14 Advanced version control15 Managing Continuous DeliveryBibliographyIndex