This document discusses the process of improving development and deployment practices at a company. It describes moving from manual deployments that took over 30 minutes and had fragile releases, to automated deployments with Jenkins that took under 3 minutes. This was achieved by improving testing practices, using deployment tools like Unicorn for faster deploys, running builds and tests in parallel on better hardware, and deploying pre-prepared changes automatically once tests passed. The changes resulted in more reliable releases, instant feedback and an automatic process allowing the company to scale from 7 developers to 12.

1. Life Embetterment with
Hundreds of Deployments
a Week
Friday, October 11, 13

2. Life Embetterment with
Hundreds of Deployments
a Week Day
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3. Friday, October 11, 13

4. Friday, October 11, 13

5. Friday, October 11, 13

6. Friday, October 11, 13

7. Fall 2012
7 Developers
1 DevOps
150 M page views /
month
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8. Using GitHub
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9. Abusing GitHub
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10. Friday, October 11, 13

11. Tests!
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12. Test coverage ~30%
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13. Friday, October 11, 13

14. Tests run 8-12 min
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15. Friday, October 11, 13

16. Deploying
untested code
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17. Friday, October 11, 13

18. No concurrent
deployments
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21. Friday, October 11, 13

22. One Friday night...
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23. Friday, October 11, 13

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25. Friday, October 11, 13

26. Slow feedback
Fragile releases
Cumbersome process
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27. Slow feedback
Fragile releases
Cumbersome process
Friday, October 11, 13

28. statsd / graphite
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29. Friday, October 11, 13

30. Friday, October 11, 13

31. Friday, October 11, 13

32. Friday, October 11, 13

33. Friday, October 11, 13

34. Slow feedback
Fragile releases
Cumbersome process
Friday, October 11, 13

35. Strange
coincidence...
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36. When shipping
new code
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37. When shipping
new code always
code,
add tests
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38. When modifying
old code
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39. When modifying
old code always
code,
add tests
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40. Always add tests
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41. Eliminate random
failures
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42. Pull Requests
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54. Release more often
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55. Git diff between
currently deployed code
and what will be
deployed:
Text
Text
https://github.com/
vinted/core/compare/
d841b93...1167740
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56. Text
Text
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57. Friday, October 11, 13

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59. Friday, October 11, 13

60. Slow feedback
Fragile releases
Cumbersome process
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61. Friday, October 11, 13

62. Friday, October 11, 13

63. Prepare release:
2 min 43 sec
Install gems:
42 sec
Stop jobs:
58 sec
Migrate database:
15 sec
Sync translations: 3 min 20 sec
Start jobs:
23 sec
Restart app:
24 min 12 sec
Total:
32 min 33 sec
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64. Friday, October 11, 13

65. Build on steroids
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66. Split builds
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67. Parallel tests
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68. Build on fast
hardware
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69. Friday, October 11, 13

70. Build on fast
hardware
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71. GC tuning
Ruby 2
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72. Use better tools
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73. Thin -> Unicorn
10x faster deploys
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74. Online database
migrations
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75. Friday, October 11, 13

76. Put your build
server to work
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77. Prepare
everything
upfront
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78. Deploy with
Jenkins
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81. Friday, October 11, 13

82. Auto deploy
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83. Instant feedback
Reliable releases
Automatic process
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84. Fall 2013
12 Developers
2 DevOps
500 M page views /
month
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85. [13:09:08] Vinc:
Inbox is not under HTTPS!
[13:25:38] Vinc:
Yes, I see HTTPS, Thanks!
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86. Friday, October 11, 13

87. Friday, October 11, 13

88. Mindaugas Mozūras
github.com/mmozuras
@mmozuras
Tomas Varaneckas
github.com/spajus
@spajus
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89. We’re hiring!
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90. Thank You!
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