This document discusses continuous delivery, which aims to build, test, and release software faster through frequent integration and deployment. The goals are quality, speed, and reducing the time it takes to deploy changes from development to production through practices like test-driven development, continuous integration, automated testing, and deployment pipelines. It provides an overview of tools to support continuous delivery processes.

1. Continuous Delivery
Applied
Mike McGarr
mike.mcgarr@excella.com
http://earlyandoften.wordpress.com
http://www.meetup.com/DC-continuous-
integration/
@jmichaelmcgarr

2. About Me
• J. Michael (Mike) McGarr
• Excella Consulting, Arlington VA
• Lead of Excella’s Java Center of Excellence
• Founder of the DC Continuous Integration,
Delivery, and Deployment Meetup
2

3. Excella is Hiring!
3

4. Continuous Delivery is…
…a set of practices and principles aimed at,
building, testing, and releasing software
faster and more frequently.
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. Goals
Quality Cycle Time
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

14. Deployment Pipelines
http://www.fotopedia.com/users/chmehl 14

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. Continuous what?
Continuous Continuous Continuous
Integration Delivery Deployment
16

17. Getting Started
Continuous Delivery Applied

18. Understand your Process
http://www.michaelnygard.com/blog/2008/02/outrunning_your_headlights.html
18

19. Understand your Organization
19

20. Developers
http://flic.kr/p/5cK2
20

21. Test Driven Development
http://reddevnews.com/articles/2007/11/01/testdriven-development-tdd.aspx 21

22. Evolutionary Design
22

23. Automate the Build
23

24. Static Code Analysis
CheckStyle
24

25. Technical Debt
25

26. The Team
26

27. Agile
27

28. Continuous Integration
28

29. 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
29

30. Testing
30

31. Testing is not a Phase
http://flic.kr/p/6bcg 31

32. Specification by Example
32

33. Specification by Example
33

34. Automated Performance Testing
34

35. Configuration Management
35

36. Version Control
36

37. Build Once, Deploy Many
37

38. Artifact Repositories
38

39. Traceability
39

40. Versioning Numbers
40

41. Externalize Configuration
ESCAPE Database
41

42. Deploying
42

43. Deployment Pipelines
(aka Build Pipelines)
43

44. Code Deployments
44

45. Version your Database
45

46. 46

47. Infrastructure as Code
47

48. Puppet
48

49. Vagrant
49

50. Monitoring (sucks)
https://github.com/monitoringsucks
50

51. Continuous Deployment
51

52. Contact Me
Mike McGarr
mike.mcgarr@excella.com
http://earlyandoften.wordpress.com
@jmichaelmcgarr
52

53. 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
• 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/
53

54. 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
54

55. 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
55

56. 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 –
• Concordion – http://www.concordion.org/
• Cucumber – http://cukes.info/
• easyb – http://www.easyb.org/
• jBehave - http://jbehave.org/
• geb - http://www.gebish.org/
56

57. Tools
• Liquibase – www.liquibase.org/
• Flyway – http://code.google.com/p/flyway/
• Escape – http://code.google.com/p/escservesconfig/
• Puppet – http://puppetlabs.com/
• Chef – http://www.opscode.com/chef/
• Vagrant – http://vagrantup.com/
• JMeter – http://jmeter.apache.org/
• Nagios - http://www.nagios.org/
57