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Continuous Delivery Applied (AgileDC)

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Continuous Delivery Applied (AgileDC)

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Writing code is fun, but deploying to production is not. Production releases are scary events that last all weekend, and you find yourself worrying about how it will go. Did we miss a configuration file? Is the database schema the same as the one in the test environment? Does the last minute hot fix we just applied break any other features? Did I forget to include an installation instruction for the system administrators?

Continuous Delivery is a collection of principles and practices aimed at addressing the problems teams typically face when releasing changes to production. By applying rigorous automation, testing and configuration management, teams are able to confidently and consistently deploy changes from version control to production without fear.

In this talk, Mike McGarr will provide listeners with an introduction into the world of Continuous Delivery. After an introduction into the concepts and principles of Continuous Delivery, he will discuss many of the techniques for implementing Continuous Delivery and recommend some tools that can be used on your development project.

Writing code is fun, but deploying to production is not. Production releases are scary events that last all weekend, and you find yourself worrying about how it will go. Did we miss a configuration file? Is the database schema the same as the one in the test environment? Does the last minute hot fix we just applied break any other features? Did I forget to include an installation instruction for the system administrators?

Continuous Delivery is a collection of principles and practices aimed at addressing the problems teams typically face when releasing changes to production. By applying rigorous automation, testing and configuration management, teams are able to confidently and consistently deploy changes from version control to production without fear.

In this talk, Mike McGarr will provide listeners with an introduction into the world of Continuous Delivery. After an introduction into the concepts and principles of Continuous Delivery, he will discuss many of the techniques for implementing Continuous Delivery and recommend some tools that can be used on your development project.

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Continuous Delivery Applied (AgileDC)

  1. 1. Continuous Delivery Applied Mike McGarr jmcgarr@gmail.com @jmichaelmcgarr http://earlyandoften.wordpress.com http://www.meetup.com/DC-continuous-integration/
  2. 2. About Me • J. Michael (Mike) McGarr • 11 years as a consultant, Excella Consulting • Founder of the DC Continuous Integration, Delivery, and Deployment Meetup 2
  3. 3. Continuous Delivery is… …a set of practices and principles aimed at, building, testing, and releasing software faster and more frequently. 3
  4. 4. 4
  5. 5. “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 5
  6. 6. Quality or Speed 6
  7. 7. 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 7
  8. 8. The Last Mile Manual Deployments Insufficient Configuration Management Infrequent, Error Prone Deployments 8
  9. 9. Stressful Releases 9
  10. 10. Frequent Automated Deployments http://flic.kr/p/29Ree 10
  11. 11. Always Production Ready 11
  12. 12. Continuous Deployment Deployment Pipelines Deployment Automation Configuration Continuous Management Testing Integration Agile 12
  13. 13. Deployment Pipelines http://www.fotopedia.com/users/chmehl 13
  14. 14. Deployment Pipelines A Deployment Pipeline is an automated manifestation of your process for getting software from version control into the hands of your users. 14
  15. 15. Deployment Pipelines (aka Build Pipelines) 15
  16. 16. Continuous what? Continuous Continuous Continuous Integration Delivery Deployment 16
  17. 17. Where do I start?
  18. 18. Understand your Process http://www.michaelnygard.com/blog/2008/02/outrunning_your_headlights.html 18
  19. 19. Understand your Organization 19
  20. 20. Developers http://flic.kr/p/5cK2 20
  21. 21. Test Driven Development http://reddevnews.com/articles/2007/11/01/testdriven-development-tdd.aspx 21
  22. 22. Evolutionary Design 22
  23. 23. Automate the Build 23
  24. 24. Static Code Analysis CheckStyle 24
  25. 25. Technical Debt 25
  26. 26. The Team 26
  27. 27. Agile 27
  28. 28. Continuous Integration 28
  29. 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. 30. Testing 30
  31. 31. Types of Tests 31
  32. 32. Testing is not a Phase http://flic.kr/p/6bcg 32
  33. 33. Specification by Example 33
  34. 34. Specification by Example 34
  35. 35. Automated Performance Testing 35
  36. 36. Configuration Management 36
  37. 37. Version Control 37
  38. 38. Build Once, Deploy Many 38
  39. 39. Externalize Configuration ESCAPE Database 39
  40. 40. Artifact Repositories 40
  41. 41. Traceability 41
  42. 42. Versioning Numbers 42
  43. 43. Branch by Abstraction 43
  44. 44. Deploying 44
  45. 45. Deployment Pipelines (aka Build Pipelines) 45
  46. 46. Build Pipeline in Jenkins 46
  47. 47. Code Deployments 47
  48. 48. Version your Database 48
  49. 49. 49
  50. 50. Infrastructure as Code 50
  51. 51. Puppet 51
  52. 52. Vagrant 52
  53. 53. Monitoring (sucks) https://github.com/monitoringsucks 53
  54. 54. Continuous Deployment 54
  55. 55. Contact Me Mike McGarr jmcgarr@gmail.com @jmichaelmcgarr http://earlyandoften.wordpress.com 55
  56. 56. 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/ 56
  57. 57. 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 • Branch by Abstraction, by Paul Hammat - http://paulhammant.com/blog/branch_by_abstraction.html 57
  58. 58. 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/ • Findbugs – http://findbugs.sourceforge.net/ • PMD – http://pmd.sourceforge.net/ • Checkstyle – http://checkstyle.sourceforge.net/ 58
  59. 59. Tools • Jenkins - http://jenkins-ci.org/ • Jenkins Performance Plugin – https://wiki.jenkins- ci.org/display/JENKINS/Performance+Plugin • Jenkins Build Pipeline Plugin - https://wiki.jenkins- ci.org/display/JENKINS/Build+Pipeline+Plugin • Nexus – http://www.sonatype.org/nexus/ • Artifactory – http://www.jfrog.com/products.php • Sonar – http://www.sonarsource.org/ • Cucumber – http://cukes.info/ • Liquibase – www.liquibase.org/ • Flyway – http://code.google.com/p/flyway/ • Escape – http://code.google.com/p/escservesconfig/ • Capistrano - https://github.com/capistrano/capistrano • Puppet – http://puppetlabs.com/ • Chef – http://www.opscode.com/chef/ • Vagrant – http://vagrantup.com/ • JMeter – http://jmeter.apache.org/ 59
  60. 60. Tools • Nagios - http://www.nagios.org/ • Logstash – http://logstash.net/ • StatsD – https://github.com/etsy/statsd • Ganglia – http://ganglia.sourceforge.net/ • Metrics – https://github.com/codahale/metrics • Graphite - http://graphite.wikidot.com/ 60

Editor's Notes

  • Cycle Time is a measure of Continuous Delivery maturity
  • 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.
  • Manual DeploymentsInsufficient Configuration ManagementInfrequent, Error Prone Deployments
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