If you’re tired of running the same commands over and over when setting up your servers, you’ll love Chef. It’s a systems integration framework that allows you to use a Ruby DSL to manage your system configurations, and then easily deploy them across your entire infrastructure, à la Capistrano. Tyler will be breaking down the various components of Chef, and showing some example configurations to get you cooking.

1. In the Kitchen
Cooking with Chef

2. Tyler Hunt
@tylerhunt

3. homegrown apps

4. Tweeter Phone
listen to your tweets

5. Problem

6. System
Administration

9. Configuration
Management

12. External DSL
vs.
Internal DSL

13. SSL
vs.
OpenID

14. XML-RPC
vs.
RESTful

15. Test::Unit + RSpec + Mocha
vs.
RSpec

16. Lines of Code
Puppet Chef
http://www.ohloh.net/p/compare?project_0=puppet&project_1=opscode-chef

18. gem install chef

19. Opscode

21. “Chef is a state based,
declarative configuration
management engine.You
define recipes of how you
want your system to look
and then chef makes it so.”
— Ezra Zygmuntowicz

22. OHAI

23. gem install ohai

24. ./bin/ohai

25. {
quot;kernelquot;: {
quot;machinequot;: quot;x86_64quot;,
quot;namequot;: quot;Linuxquot;,
quot;osquot;: quot;GNU/Linuxquot;,
quot;versionquot;: quot;#1 SMP Wed Aug 20 21:08:51 UTC 2008quot;,
quot;releasequot;: quot;2.6.24-19-xenquot;
},
quot;uptime_secondsquot;: 12043422,
quot;platform_versionquot;: quot;8.04quot;,
quot;platformquot;: quot;ubuntuquot;,
quot;virtualizationquot;: {
quot;rolequot;: quot;guestquot;,
quot;emulatorquot;: quot;xenquot;
},
quot;osquot;: quot;linuxquot;,
quot;idletimequot;: quot;115 days 23 hours 34 minutes 06 secondsquot;,
quot;idletime_secondsquot;: 10020846,
quot;lsbquot;: {
quot;idquot;: quot;Ubuntuquot;,
quot;descriptionquot;: quot;quot;Ubuntu 8.04.1quot;quot;,
quot;codenamequot;: quot;hardyquot;,
quot;releasequot;: quot;8.04quot;
},
quot;os_versionquot;: quot;2.6.24-19-xenquot;
}

27. Nodes

28. Cookbooks

29. Recipes

30. Definitions
def•i•ni•tions
(děf'ə-nĭsh'ənz) n. pl.

31. Attributes

32. Libraries

33. Files

34. Templates
Templates
Templates
Templates
Templates
Templates
Templates

35. cookbooks/
my_cookbook/
attributes/
definitions/
files/
libraries/
recipes/
templates/

36. gems Mash.new unless attribute?(quot;gemsquot;)
gems[:rake] ||= {
:version => quot;0.8.3quot;
}
gems[:nokogiri] ||= {
:version => quot;1.0.5quot;
:source => quot;http://gems.github.com/quot;
}

37. {
quot;gemsquot;: {
quot;rakequot;: {
quot;versionquot;: quot;0.8.3quot;
},
quot;nokogiriquot;: {
quot;versionquot;: quot;1.0.5quot;,
quot;sourcequot;: quot;http://gems.github.comquot;
}
}
}

38. node[:gems].each do |name, gem|
gem_package name do
version gem[:version] if gem[:version]
source gem[:source] if gem[:source]
action :install
end
end

39. node[:gems].each do |name, gem|
gem_package name do
version gem[:version] if gem[:version]
source gem[:source] if gem[:source]
action :install
end
end

40. Resources
Α
Β Γ

41. cron
execute
directory
file
group
user
link
package
remote_directory
remote_file
route
script
service
template
http_request

42. Providers

43. node[:gems].each do |name, gem|
gem_package name do
version gem[:version] if gem[:version]
source gem[:source] if gem[:source]
action :install
end
end

44. directory quot;/tmp/somethingquot; do
owner quot;rootquot;
group quot;rootquot;
mode 0755
action :create
end

45. file quot;/tmp/somethingquot; do
owner quot;rootquot;
group quot;rootquot;
mode 0755
action :touch
end

46. cron quot;noopquot; do
hour quot;5quot;
command quot;/bin/truequot;
end

47. execute quot;slapaddquot; do
command quot;slapadd < /tmp/something.ldifquot;
creates quot;/var/lib/slapd/uid.bdbquot;
action :run
end

48. group quot;adminquot; do
gid 999
end

49. user quot;randomquot; do
comment quot;Random Userquot;
uid quot;1000quot;
gid quot;usersquot;
home quot;/home/randomquot;
shell quot;/bin/zshquot;
password quot;$1$JJsvHslV$szsCjVEroftprNn4JHtDi.quot;
end

50. link quot;/tmp/passwdquot; do
to quot;/etc/passwdquot;
link_type :symbolic
end

51. package quot;tarquot; do
version quot;1.16.1-1quot;
action :install
end

52. # file from cookbook
remote_file quot;/tmp/testquot; do
source quot;testquot;
mode 0644
end
# file from remote source
remote_file quot;/tmp/testfilequot; do
source quot;http://example.com/files/testquot;
mode 0644
end

53. remote_directory quot;/tmp/remote_somethingquot; do
source quot;somethingquot;
files_backup 10
files_owner quot;rootquot;
files_group quot;rootquot;
files_mode 0644
owner quot;nobodyquot;
group quot;nobodyquot;
mode 0755
end

54. route quot;20.0.0.0quot; do
gateway quot;10.0.0.20quot;
metric 5
route_type :net
netmask quot;255.255.0.0quot;
end

55. script quot;install_somethingquot; do
interpreter quot;bashquot;
user quot;rootquot;
cwd quot;/tmpquot;
code <<-EOH
wget http://example.com/tarball.tar.gz
tar -zxf tarball.tar.gz
cd tarball
./configure
make
make install
EOH
end

56. service quot;example_servicequot; do
case node[:platform]
when quot;CentOSquot;, quot;RedHatquot;, quot;Fedoraquot;
service_name quot;redhat_namequot;
else
service_name quot;other_namequot;
end
supports :restart => true
action [ :enable, :start ]
end

57. template quot;/etc/config.confquot; do
source quot;config.conf.erbquot;
variables({
:timeout => 360
})
end

58. http_request quot;posting dataquot; do
url quot;http://example.com/check_inquot;
message :some => quot;dataquot;
end

59. http://flickr.com/photos/philipyk/160559925/
http://flickr.com/photos/florin_mogos/2523984446/
http://flickr.com/photos/giorgiocardellini/271092412/
http://flickr.com/photos/onkel_wart/2487637968/
http://flickr.com/photos/dunechaser/161509118/

60. http://radlab.cs.berkeley.edu/wiki/Chef
http://junglist.gen.nz/chef-vs-puppet/
http://wiki.opscode.com/display/chef/Home
http://brainspl.at/articles/2009/01/15/
http://brainspl.at/articles/2009/01/31/

61. Thank You