A talk given at Rails Israel about getting value with Chef at your enterprise while minimizing the common errors that people make.

1. Cooking an Omelette
with Chef
Case Taintor
Wednesday, October 9, 13

2. Survey
• Who has been manually configuring their
machines?
• Who has been using a tool like Chef or
Puppet?
• Who is an expert in Chef?
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3. Purpose
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5. How did we work?
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7. Infrastructure as Code
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14. Where do we start?
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15. Priorities
• Reproducibility
• Testability
• Traceability
• Keep It Simple, Stupid
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16. How does Chef work?
• Figures out which instructions to run
• Runs them in an idempotent way
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17. Cookbook
Everything to install & configure a component
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18. Cookbooks
attributes
definitions
files
libraries
providers
recipes
resources
templates
attributes
definitions
files
libraries
providers
recipes
resources
templates
metadata.rb
$ ls -1 cookbook
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19. Cookbooks
attributes
definitions
files
libraries
providers
recipes
resources
templates
metadata.rb
$ ls -1 cookbook
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20. nginx cookbook
attributes
definitions
files
libraries
providers
recipes
resources
templates
attributes
attributes/default.rb
attributes/source.rb
definitions
files
recipes
recipes/default.rb
recipes/source.rb
templates
metadata.rb
$ ls -1 nginx
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21. Then What?
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22. run_list
{
...
"run_list": [
"recipe[rvm::system]",
"recipe[nginx]",
"recipe[user]"
]
...
}
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23. How do I run Chef?
node1
chef-solo
all config
node2
chef-solo
all config
chef-solo
node1
chef-client
config
node2
chef-client
config
chef-server
chef-server
config
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24. Problems
Problem Solution
Repeatability
Reproducibility
Idempotence
Chef
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25. Problems
Problem Solution
Repeatability
Reproducibility
Idempotence
Chef
Versioning
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26. default rvm
default['rvm']['default_ruby'] = "ruby-1.9.3-p327"
default['rvm']['rubies'] = []
default[‘rvm][‘version’] = “head”
rvm/attributes/default.rb
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27. Berkshelf
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28. Problems
Problem Solution
Repeatability
Reproducibility
Idempotence
Chef
Versioning Berkshelf
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29. Problems
Problem Solution
Repeatability
Reproducibility
Idempotence
Chef
Versioning Berkshelf
Development
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30. Wednesday, October 9, 13

31. Problems
Problem Solution
Repeatability
Reproducibility
Idempotence
Chef
Versioning Berkshelf
Development Vagrant +VirtualBox
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32. Problems
Problem Solution
Repeatability
Reproducibility
Idempotence
Chef
Versioning Berkshelf
Development Vagrant +VirtualBox
KISS
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33. Gusteau
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34. Problems
Problem Solution
Repeatability
Reproducibility
Idempotence
Chef
Versioning Berkshelf
Development Vagrant +VirtualBox
KISS Gusteau
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35. omelette-server
• rvm • nginx • users
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36. Process
$ gusteau init omelette-cooker
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37. Berksfile
site :opscode
cookbook 'rvm', :github => 'fnichol/chef-rvm'
cookbook 'nginx'
cookbook 'user'
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38. .gusteau.yml
...
environments:
development:
nodes:
web:
run_list:
- recipe[rvm::system]
- recipe[nginx]
- recipe[user::data_bag]
...
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39. $ vagrant up development-web
$ gusteau converge development-web
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40. Wednesday, October 9, 13

41. Next Problems
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42. Share your stuff
• Inside your organization
• Outside your organization
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43. default rvm
default['rvm']['default_ruby'] = "ruby-1.9.3-p327"
default['rvm']['rubies'] = []
default[‘rvm][‘version’] = “head”
rvm/attributes/default.rb
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44. your rvm modifications
default['rvm']['default_ruby'] = "ruby-1.9.3-p448"
default['rvm']['rubies'] = ["ruby-1.9.3-p448",
"ruby-1.9.3-p327"]
default[‘rvm][‘version’] = "1.21.4"
rvm/attributes/default.rb
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45. Wrapper Cookbooks
$ knife cookbook create wrapper-rvm -o site-cookbooks
normal[:rvm][:default_ruby] = "ruby-1.9.3-p448"
normal[:rvm][:rubies] = ["ruby-1.9.3-p448",
"ruby-1.9.3-p327"]
normal[:rvm][:version] = "1.21.4"
include_recipe "rvm::system"
site-cookbooks/wrapper-rvm/attributes/default.rb
site-cookbooks/wrapper-rvm/recipes/default.rb
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46. Wrapper Cookbooks
place dependencies in metadata.rb
depends ‘rvm’, ‘0.9.1’
site-cookbooks/wrapper-rvm/metadata.rb
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47. .gusteau.yml
...
environments:
development:
nodes:
web:
run_list:
- recipe[wrapper-rvm]
- recipe[nginx]
- recipe[user::data_bag]
...
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48. $ vagrant up development-web
$ gusteau converge development-web
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49. Share
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50. Berksfile
site :opscode
cookbook 'rvm', :github => 'fnichol/chef-rvm'
cookbook 'nginx'
cookbook 'user'
cookbook ‘wrapper-rvm’, :git => ‘...:wrapper-
rvm.git, :branch => ‘0.1.0’
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51. Next Steps
• Sharing common setups
• Cookbook development
• Move to Chef Server
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52. Wrap Up
• Recognize what you want
• Use tools
• Iterate
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53. Questions?
More Info: @ctaintor
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54. Image References
Danley, Brent. "Crowded Beach." Flickr.Yahoo!, n.d.Web. 05 Oct. 2013. <http://
www.flickr.com/photos/brentdanley/1086226020/>.
Goehring, David. "Does Not Work." Flickr.Yahoo!, n.d.Web. 04 Oct. 2013.
<http://www.flickr.com/photos/carbonnyc/496721450/>.
Harber, Chris. "Food I Made 1." Flickr.Yahoo!, n.d.Web. 07 Oct. 2013. <http://
www.flickr.com/photos/britishchris/4437265186/>.
Johnson, Darren. "Koh Ngai." Flickr. ShotHotspot.com, n.d.Web. 04 Oct. 2013.
<http://www.flickr.com/photos/dazjohnson/7424536244/>.
Komulainen,Tommi. "Handlebar Is No More." Flickr.Yahoo!, n.d.Web. 05 Oct.
2013. <http://www.flickr.com/photos/tommikomulainen/137069098/>.
Reck, Bob. "My Motorcycle." Flickr.Yahoo!, n.d.Web. 05 Oct. 2013. <http://
www.flickr.com/photos/u2sockmonkey/116641053/>.Used with permission.
Wednesday, October 9, 13