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Configuration Management Camp 2015
- 1. Chef Reusability! Config Management Camp! Ghent, Belgium! February 2015
- 3. whoami
- 4. Part 1
- 5. Things that are true
- 6. New Chef users expect community cookbooks to just work
- 7. Especially the Chef maintained cookbooks
- 8. This is not the current state of things
- 9. This leads to sadness
- 10. We must repair it
- 12. The status quo cannot be allowed to continue
- 15. Weak scoping
- 21. The path out of the darkness https://www.flickr.com/photos/71267357@N06/15864687537
- 22. Change how cookbooks are written
- 25. Eliminate the pain points
- 27. Make it super easy! to write resources
- 28. Ship resources for ALL THE THINGS
- 32. Part 2
- 36. You just separated data from code
- 37. You also just built an interface
- 41. This is where things get weird
- 44. There is a large amount of variation between software versions
- 45. There is an insane amount variation across platforms
- 46. These differences need to be handled somewhere
- 47. Early techniques did everything in the recipe
- 49. Later techniques focused on isolation
- 56. We now have decision logic in our interface
- 57. Default values often need to be computed
- 58. Doing this in the interface leads to sorrow
- 60. We need a better way
- 66. Why resources are best https://www.flickr.com/photos/cross_stitch_ninja/4932950637
- 67. node attributes roles environments databags are nice to haves
- 68. They drive data about resources
- 71. Resources have a standardized interface
- 72. Resources have types, names, and parameters
- 73. Type
- 74. Name
- 75. Parameters
- 78. Resource can see each other
- 79. Promise to talk
- 81. Resource behave the same across platforms
- 85. Resource can have multiple providers
- 88. yum
- 91. mysql httpd
- 93. fin