Slides from my NDC2011 session on Continuous Deployment.

1. http://www.flickr.com/photos/iboy_daniel/92896276/sizes/l/in/photostream/ Continuous Deployment ASP.net style @Ben_Hall Ben@BenHall.me.uk

2. Londonambridge (UK) based C# MVPLove Open Source Projects Co-founder of Meerkatalyst Co-Author of Testing ASP.net Web Applications http://www.testingaspnet.com

3. Agenda Myths Reality of life Culture Tooling First steps

4. Reducing risk and increasing opportunity by releasing changes as they happen

5. http://www.flickr.com/photos/mayhem/292141287/sizes/o/in/photostream/ Let’s deploy 4 weeks worth of changes at once! Opps… I wonder what went wrong

6. If it hurts, do it more often

7. Continuous Deployment Committed: 40 lines added 80 lines deleted Push changes to live Automated monitoring systems Users start to see benefits

8. Make releases a non-event http://www.flickr.com/photos/violla/5110156999/sizes/l/in/photostream/

9. Myths

10. git push <PaaS> production

11. Cowboy driven development http://www.flickr.com/photos/esteemedhelga/3850944786/

12. Pushing untested changes

13. Throw it over the wall http://www.flickr.com/photos/vizzzual-dot-com/2226095398/

14. It wouldn’t work for us

15. Reality

16. How long would it take your organisation to deploy a change that involved just one single line of code? Mary Poppendieck Lean Software Development http://www.agilejourneyman.com/2011/01/continoues-delivery.html

17. “Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.” Agile Manifesto http://agilemanifesto.org/principles.html

18. “Continuous deployment doesn’t mean our product changes 30 times a day, it means we can be responsive” Pascal-Louis Perez WealthfrontaChing http://www.manualdastartup.com.br/blog/quotes-da-sllconf-2011/

19. All the cool startups are doing it

20. Asset Management by Mutual Funds in US. Highly regulated. $2,000,000/day No Ops, No QA http://www.slideshare.net/pascallouis/sll-conf-continuous-deployment

21. Waste http://www.flickr.com/photos/hape_gera/5260530549/

22. Feedback

23. Reduce risk http://www.flickr.com/photos/ianz/2594572474/

24. Improve team morale

25. Culture or Tooling?

26. culture

27. “High” Test Coverage High != line coverage High == confidence of changes

28. No Blame http://www.flickr.com/photos/cyberslayer/2535502341/

29. Trust http://www.flickr.com/photos/sephiroty/317320551/

30. Desire to reduce risk

31. Willingness to experiment

32. Dark launches and gate keepers http://www.flickr.com/photos/krymzon/102096279/sizes/z/in/photostream/

33. Nasa style Go No-Go http://www.flickr.com/photos/28634332@N05/4053997535/

34. Feature switches http://www.flickr.com/photos/maxabxarata/535048895/

35. Data Driven Companies

36. CEOs, Managers and marketing LOVE data!

37. Design for system failure http://www.flickr.com/photos/thekrankis/3377123568/sizes/l/in/photostream/

38. Five whys

39. Everything needs to be automated Fix it via a script Write a script to detect and automate in the future

40. tooling Sounds great?! But how?

41. Code focused tools

42. Git Why does git make CD easier?

43. TeamCity

44. Branch in code

45. Feature switches

46. If (cfg.enable_unicorn_polo) { // Do something new / cool } else { // Do something boring }

48. public override void OnActionExecuting(ActionExecutingContextfilterContext) { boolfeaturedOn = FeatureSwitchService.GetStatus(_featureName); if(!featureOn) filterContext.Result = new ContentResult { Content = null }; }

49. MSDeploy, Dolphin Deploy, AppHarbor All you really need is Meerkatalyst

51. Database Migrations

52. Databases are always difficult Stop the line for DB?

53. Migrations in code? Forward Backwards compatible

55. Infrastructure

56. Chef / Knife It works on Windows!

57. Installing .Net via MSI msiFile = “C:nstallerset_framework.msi” execute “Install .Net” do command “msiexec /qn /i #{msiFile}” end

58. Load Balancers

59. Round robin deployments Deploy to just one

60. listen webfarm 0.0.0.0:80 mode http stats enable server web001 192.168.0.102:80 check server web002 192.168.0.103:80 check https://gist.github.com/354469

61. http://haproxy.1wt.eu/img/haproxy-stats.png

62. 10% deployment Manage in code via feature switches Facebook style deployments

63. Design for failure Identify single point of failure

64. Load balancers Data centres “The Cloud”

65. Front end cache serversMessage QueuesDatabase Master Slave

66. Auto discovery

67. monitoring

68. Cloudkick Monitor your servers

69. Zabbix and windows perf counters

70. Zabbix Example

71. Ask the application Health checks

72. Image of a dashboard removed. Sorry.

73. Application level monitoring

74. A Testing Website Optimizer Performable KissMetrics MixPanel

75. Data is king. The winner is the one with most data.

76. Dashboard – BIG DASHBOARDS http://www.flickr.com/photos/mogwai_83/3022261893/

77. kaChing dashboard http://eng.wealthfront.com/2010/05/deployment-infrastructure-for.html

80. Flickr dashboard

81. Immune System Without this, continuous deployment can be hard and dangerous.

82. Meerkatalyst

83. Images of application removed. Sorry. Sign up at http://www.meerkatalyst.com

84. Do you need high test coverage?

85. Lean, MVP, proving concept

86. Tests around key areas. Monitoring to ensure nothing is missed.

87. First steps to continuous deployment summary

88. 1) Automate Deployment Dolphin Deploy WebDeploy MSBuild

89. 2) Monitor System User, Application, System

90. 3) Feature switches Hide

91. 4) Do it Start with staging...

92. Thank you

93. More information http://about.digg.com/blog/continuous-deployment-code-review-and-pre-tested-commits-digg4 http://radar.oreilly.com/2009/03/continuous-deployment-5-eas.html http://www.startuplessonslearned.com/2009/06/why-continuous-deployment.html http://blog.stelligent.com/integrate-button/2011/03/list-of-software-tools-for-continuous-delivery-in-the-cloud.html http://eng.wealthfront.com/2011/02/continuous-deployment-for-data-not-just.html http://techcrunch.com/2011/05/30/facebook-source-code/ http://www.justin.tv/startuplessonslearned/b/286511488