Continuous Delivery Applied
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This document provides an overview of continuous delivery and deployment practices. It begins with introductions and background on continuous delivery. It then discusses topics like deployment pipelines, testing, configuration management, versioning, branching strategies, automated deployments, and monitoring. Throughout examples and further reading resources are provided. The goal is to explain how to set up continuous delivery of software through practices like continuous integration, deployment automation, and monitoring.
![Cycle Time
“How long would it take your organization to
deploy a change [to production] that involves
just one single line of code? Do you do this on a
repeatable, reliable basis?”
- Mary and Tom Poppendieck,
Implementing Lean Software Development
8](https://image.slidesharecdn.com/continuousdeliveryapplied-agilerichmond-121115200249-phpapp02-121214161303-phpapp02/85/Continuous-Delivery-Applied-8-320.jpg)
Continuous Delivery Applied
- 1. Continuous Delivery Applied Mike McGarr jmcgarr@gmail.com @jmichaelmcgarr http://earlyandoften.wordpress.com http://www.meetup.com/DC-continuous-integration/
- 2. About Me • J. Michael (Mike) McGarr • 11 years as an IT consultant • Director of DevOps for Learn, Blackboard • Founder of the DC Continuous Integration, Delivery, and Deployment Meetup 2
- 3. Continuous Delivery is… …a set of practices and principles aimed at, building, testing, and releasing software faster and more frequently. 3
- 4. 4
- 5. 5
- 6. “Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.” - First of the Twelve Principles behind the Agile Manifesto 6
- 7. Quality or Speed 7
- 8. Cycle Time “How long would it take your organization to deploy a change [to production] that involves just one single line of code? Do you do this on a repeatable, reliable basis?” - Mary and Tom Poppendieck, Implementing Lean Software Development 8
- 9. The Last Mile Manual Deployments Insufficient Configuration Management Infrequent, Error Prone Deployments 9
- 10. Stressful Releases 10
- 11. Frequent Automated Deployments http://flic.kr/p/29Ree 11
- 12. Always Production Ready 12
- 13. Continuous Deployment Deployment Pipelines Deployment Automation Configuration Continuous Management Testing Integration Agile 13
- 15. Deployment Pipelines A Deployment Pipeline is an automated manifestation of your process for getting software from version control into the hands of your users. 15
- 16. Deployment Pipelines (aka Build Pipelines) 16
- 17. Continuous what? Continuous Continuous Continuous Integration Delivery Deployment 17
- 18. Where do I start?
- 19. Understand your Process http://www.michaelnygard.com/blog/2008/02/outrunning_your_headlights.html 19
- 20. Understand your Organization 20
- 21. Developers http://flic.kr/p/5cK2 21
- 23. Evolutionary Design 23
- 24. Automate the Build 24
- 25. Static Code Analysis CheckStyle 25
- 26. Technical Debt 26
- 27. The Team 27
- 28. Agile 28
- 29. Continuous Integration 29
- 30. Continuous Integration Check-in Daily Commit to Trunk Automate the Build Keep the Build Fast Every Commit results in Build Test in Clone of Production Automate Deployment 30
- 31. Build Pipeline in Jenkins 31
- 32. Testing 32
- 33. Types of Tests 33
- 34. Test Strategy Taken from Growing Object-Oriented Software, Guided by Tests 34
- 35. Testing is not a Phase http://flic.kr/p/6bcg 35
- 36. Specification by Example 36
- 37. Specification by Example 37
- 39. Configuration Management 39
- 40. Version Control 40
- 41. Build Once, Deploy Many 41
- 42. Externalize Configuration ESCAPE Database 42
- 43. Artifact Repositories 43
- 44. Traceability 44
- 45. Versioning Numbers 45
- 46. Branch by Abstraction 46
- 47. Deploying 47
- 48. Automated Deployments 48
- 49. Code Deployments 1. Push New Binary to Server 2. Stop Server 3. Archive Old Binary 4. Deploy New Binary 5. Start Server 49
- 50. Version your Database 50
- 51. Database Deployments HTML .sql Production DBA DB Change Test DB Version Build Change Control Server DB Dev Change 51
- 52. 52
- 54. DevOps: it’s about culture http://dev2ops.org/2012/10/devops-transformation-workshop-for-technical-managers/ 54
- 55. Infrastructure as Code 55
- 56. Puppet 56
- 57. Vagrant 57
- 58. Monitoring (sucks) https://github.com/monitoringsucks 58
- 59. Continuous Deployment 59
- 61. Further Reading • Continuous Delivery: Reliable Software Releases through Build, Test and Deployment Automation, by Jez Humble and David Farley - http://www.amazon.com/Continuous-Delivery-Deployment-Automation- Addison-Wesley/dp/0321601912 • Continuous Integration, By Paul M Duvall - http://www.amazon.com/Continuous-Integration-Improving-Software- Reducing/dp/0321336380 • Refactoring Databases, By Scott Ambler and Pramod Sadalage - http://www.amazon.com/Refactoring-Databases-Evolutionary- paperback-Addison-Wesley/dp/0321774515 • Refactoring, By Martin Fowler - http://www.amazon.com/Refactoring- Improving-Design-Existing-Code/dp/0201485672 • Growing Object-Oriented Software, Guided by Tests, by Steven Freeman and Nat Pryce - http://www.amazon.com/Growing-Object- Oriented-Software-Guided-Tests/dp/0321503627 61
- 62. Further Reading • Extreme Programming Explained, by Kent Beck - http://www.amazon.com/Extreme-Programming-Explained-Embrace- Change/dp/0201616416 • Release It!, by Michael Nygard - http://pragprog.com/book/mnee/release-it • xUnit Test Patterns, by Gerard Meszaros - http://www.amazon.com/xUnit-Test-Patterns-Refactoring- Code/dp/0131495054 • Working Effectively with Legacy Code, by Michael Feathers - http://www.amazon.com/Working-Effectively-Legacy-Michael- Feathers/dp/0131177052 • Agile Testing, by Lisa Crispin and Janet Gregory - http://www.amazon.com/Agile-Testing-Practical-Guide- Testers/dp/0321534468 62
- 63. Further Reading • Test Driven Development (TDD) – http://en.wikipedia.org/wiki/Test- driven_development • Introducing BDD, by Dan North – http://dannorth.net/introducing-bdd/ • Agile Manifesto – http://agilemanifesto.org/ • Scrum – http://www.scrumalliance.org/learn_about_scrum • Continuous Integration, by Martin Fowler – http://martinfowler.com/articles/continuousIntegration.html • Specification by Example, by Gojko Adzic - http://specificationbyexample.com/ • Build Pipelines - http://www.magpiebrain.com/2009/12/13/a-brief-and- incomplete-history-of-build-pipelines/ • Implementing Lean Software Development, by Mary and Tom Poppendieck - http://www.amazon.com/Implementing-Lean-Software- Development-Concept/dp/0321437381 63
- 64. Further Reading • Maven Releases on Steriods, by Axel Fontaine – http://www.axelfontaine.com/2011/01/maven-releases-on-steroids- adios.html • What is in a Name? Usually a version number, actually., by James Betteley - http://jamesbetteley.wordpress.com/2011/07/07/what-is-in-a- name-usually-a-version-number-actually/ • Build Once, Deploy Many - http://earlyandoften.wordpress.com/2010/09/09/build-once-deploy- many/ • Evolutionary Design - http://martinfowler.com/articles/designDead.html • Continuous Deployment - http://timothyfitz.wordpress.com/2009/02/08/continuous-deployment/ • Sonar’s Technical Debt Calculation - http://www.sonarsource.org/evaluate-your-technical-debt-with-sonar/ • Gherkin - https://github.com/cucumber/cucumber/wiki/Gherkin 64
- 65. Further Reading • Branch by Abstraction, by Paul Hammant http://paulhammant.com/blog/branch_by_abstraction.html • Making Large Scale Changes Incrementally with Branch by Abstraction, by Jez Humble - http://continuousdelivery.com/2011/05/make-large-scale-changes- incrementally-with-branch-by-abstraction/ • What is DevOps?, by Damon Edwards - http://dev2ops.org/2010/02/what-is-devops/ • Monitoring Sucks - https://github.com/monitoringsucks 65
- 66. Tools • Git - http://git-scm.com/ • Subversion - http://subversion.tigris.org/ • Mercurial - http://mercurial.selenic.com/ • Rational ClearCase - http://www- 01.ibm.com/software/awdtools/clearcase/ • Serena Dimensions CM - http://www.serena.com/products/dimensions- cm/index.html • Ant - http://ant.apache.org/ • Ivy - http://ant.apache.org/ivy/ • Maven - http://maven.apache.org/ • Gradle - http://gradle.org/ • JUnit – http://www.junit.org/ • Mockito – http://code.google.com/p/mockito/ • Hamcrest – http://code.google.com/p/hamcrest/ • Spock – http://code.google.com/p/spock/ • dbUnit – http://www.dbunit.org/ • Unitils – http://unitils.org/summary.html 66
- 67. Tools • Findbugs – http://findbugs.sourceforge.net/ • PMD – http://pmd.sourceforge.net/ • Checkstyle – http://checkstyle.sourceforge.net/ • JIRA – http://www.atlassian.com/software/jira/overview • GitHub – https://github.com/ • Jenkins - http://jenkins-ci.org/ • TeamCity – http://www.jetbrains.com/teamcity/ • Nexus – http://www.sonatype.org/nexus/ • Artifactory – http://www.jfrog.com/products.php • Sonar – http://www.sonarsource.org/ • FitNesse – http://fitnesse.org/ • Concordion – http://www.concordion.org/ • Cucumber – http://cukes.info/ • easyb – http://www.easyb.org/ • jBehave - http://jbehave.org/ • geb - http://www.gebish.org/ 67
- 68. Tools • Liquibase – www.liquibase.org/ • Flyway – http://code.google.com/p/flyway/ • Escape – http://code.google.com/p/escservesconfig/ • Capistrano - https://github.com/capistrano/capistrano • Deployinator - https://github.com/etsy/deployinator • Puppet – http://puppetlabs.com/ • Chef – http://www.opscode.com/chef/ • Ansible - http://ansible.cc/ • Vagrant – http://vagrantup.com/ • JMeter – http://jmeter.apache.org/ • Nagios - http://www.nagios.org/ • Logstash - http://logstash.net/ • StatsD – https://github.com/etsy/statsd • Metrics – http://metrics.codahale.com/ • Ganglia – http://ganglia.sourceforge.net/ • Graphite - http://graphite.wikidot.com/ 68
Editor's Notes
- #9: Cycle Time is a measure of Continuous Delivery maturity
- #10: Collaboration (DEV + Customer, DEV + Operations)Talking early and often…break down walls. [DevOps]Automation. Automate Everything! Build, Test, Deploy!Frequency. Frequent means small. Easier to troubleshoot, rollback. Reduces Risk.Feedback. Change triggers feedback. Feedback is fast. Team acts on it.
- #11: Manual DeploymentsInsufficient Configuration ManagementInfrequent, Error Prone Deployments