This talk was given at StrangeLoop 2010. It builds a case for devops and then gives a basic explanation of Chef.

1. AUTOMATE OR DIE!
Trotter Cashion / Strange Loop 2010
http://pinktentacle.com/images/irex2009_4_large.jpg

2. CO-FOUNDER

3. @CASHION
http://www.charlesheflin.com/wp-content/uploads/2010/06/fail-whale.jpg

4. github.com/trotter
http://gems.github.com/octocat.png

5. AGENDA

6. THE MANUAL PROBLEM

7. CHEF SERVER VS. CHEF SOLO

8. COOKBOOK INTERNALS

9. GOING WAY BACK
http://www.ameshistoricalsociety.org/identify/old_car1.jpg

10. FORD VS. THE OTHER GUYS
Pre-Ford (?-1907) Model T (1915)
$2,000 - $3,000 $850
Made by hand Assembly Line
12.5 hours to build 1.5 hours

11. BY 1930
250 car companies had died
http://sdo210.files.wordpress.com/2010/05/grantwood-american-gothic-1930.jpg

12. SO WHAT ABOUT US?
http://media.photobucket.com/image/nerds%20candy/civy1811/car002.jpg

13. Most Tech Companies are Essentially
American Auto Companies Pre-Ford

14. MYSQL
http://www.dolphinsc.com/images/Dolphin.jpg

15. POSTGRES
http://images.buycostumes.com/mgen/merchandiser/32494.jpg

16. APACHE
http://www.wallpapers-free.org/34/-/Apache_Longbow_Helicopter/

17. NGINX
http://www.allbestwallpapers.com/travel-kremlin_and_red_square_fireworks,_moscow,_russia_wallpapers.html

19. Memcached

20. Memcached
Redis

21. Memcached
Redis
Mongodb

22. Memcached
Redis
Mongodb Riak

23. Memcached
Redis
Mongodb Riak
Cassandra

24. Memcached
Redis
Mongodb Riak
Cassandra
Project Voldemort

25. Memcached
Redis
Mongodb Riak
Ubuntu Cassandra
Project Voldemort

26. Memcached
Redis Redhat
Mongodb Riak
Ubuntu Cassandra
Project Voldemort

27. Memcached
Redis Redhat
Solaris Mongodb Riak
Ubuntu Cassandra
Project Voldemort

28. Memcached iptables
Redis Redhat
Solaris Mongodb Riak
Ubuntu Cassandra
Project Voldemort

29. Memcached iptables
Redis Redhat
Solaris Mongodb Riak
Ubuntu Cassandra
sshd
Project Voldemort

30. Memcached iptables
Redis Redhat
Solaris Mongodb Riak
DNS Servers
Ubuntu Cassandra
sshd
Project Voldemort

31. Memcached iptables
Redis Redhat
Solaris Mongodb Riak
DNS Servers
Ubuntu Cassandra
sshd
TCP/IP internals
Project Voldemort

32. We Idolize the Artisan Sysadmin

33. ... but what do we end up with?

34. SNOWFLAKES
... that become avalanches
http://www.enviro-bc.ca/wp-content/uploads/2009/04/bowlake-aval_clair-israelson.jpg

35. HEISENBUGS
http://osulibrary.oregonstate.edu/specialcollections/coll/nonspcoll/catalogue/portrait-heisenberg-600w.jpg

36. NO MORE MONEY!
http://assets.troubledteenswizard.com/uploaded/WoW/nomoney1.jpg

37. We’re really left with two choices

38. Automate... or die.

39. Automation is not hard!

40. CFENGINE
http://hackedgadgets.com/wp-content/2/LEGO_V8_Engine_1.jpg

41. PUPPET
http://www.flickr.com/photos/willemvelthoven/381608678/sizes/l/

42. CHEF!
http://www.flickr.com/photos/venndiagram/4891510333/sizes/l/

43. WRITTEN BY
http://www.opscode.com/

44. WRITTEN IN
http://www.prestonlee.com/wp-content/uploads/2008/09/ruby.png

45. Two Delicious Flavors

46. SERVER
http://upload.wikimedia.org/wikipedia/commons/e/e0/Google%E2%80%99s_First_Production_Server.jpg

47. HOW IT WORKS

48. HOW IT WORKS
Your
Computer

49. HOW IT WORKS
Your
Computer
Box to
Provision

50. HOW IT WORKS
Your
Computer
Box to
Chef Server
Provision

51. HOW IT WORKS
Your
Computer
Prepare
Box to
Chef Server
Provision

52. HOW IT WORKS
Your
Computer
Prepare
What now?
Box to
Chef Server
Provision

53. HOW IT WORKS
Your
Computer
Prepare Cookbooks
What now?
Box to
Chef Server
Provision

54. HOW IT WORKS
Your
Computer
Prepare Cookbooks
What now?
Box to
Chef Server
Provision
Run!

55. SOLO
http://www.pbs.org/parents/supersisters/han_solo-thumb-454x654.jpg

56. HOW IT WORKS

57. HOW IT WORKS
Your
Computer

58. HOW IT WORKS
Your Box to
Computer Provision

59. HOW IT WORKS
Prepare
Your Box to
Computer Provision

60. HOW IT WORKS
Prepare
Your Box to
Computer
Cookbooks Provision

61. HOW IT WORKS
Prepare
Your Box to
Computer
Cookbooks Provision
Go!

62. Chef Structure

63. CHEF HEIRARCHY
Node
Roles Cookbooks
Cookbooks
Recipes Attributes Templates Definitions

64. ROLES ARE REUSABLE!
config/dev.json config/db.json
roles/db.rb

65. GETTING
GOING
http://www.flickr.com/photos/seandreilinger/959864706/sizes/o/

66. WHAT YOU NEED

67. WHAT YOU NEED
Ruby &
Rubygems

68. WHAT YOU NEED
Ruby &
Rubygems
`gem install chef` Chef Gem

69. WHAT YOU NEED
Ruby &
Rubygems
`gem install chef` Chef Gem
`git clone http://github.com/
Chef Repo
opscode/chef-repo.git`

70. COOKBOOKS.OPSCODE.COM
http://cookbooks.opscode.com/

71. TERMINAL JUNKIES

72. TERMINAL JUNKIES
•spatula search mysql

73. TERMINAL JUNKIES
•spatula search mysql
•spatula install mysql

74. TERMINAL JUNKIES
•spatula search mysql
•spatula install mysql
•spatula show mysql

75. TERMINAL JUNKIES
•spatula search mysql
•spatula install mysql
•spatula show mysql
•... knife has similar functionality

76. GET THE BOX READY
ssh db-one.host “install ruby”
spatula prepare db-one.host =
ssh db-one.host “install chef”

77. GO GO GO!
rsync repo to db-one.host
spatula cook db-one.host db = ssh db-one.host “sudo
chef-solo -c config/solo.rb
-j config/db.json”

78. WITH CHEF SERVER
install dependencies
turn on client
send cookbooks to client

79. DIGGING DEEPER
http://media.photobucket.com/image/minecraft/bluekabal/roma/minesofroma.jpg

80. CHEF HEIRARCHY
Node
Roles Cookbooks
Cookbooks
Recipes Attributes Templates Definitions

81. A NODE
// ./config/db_one.json
{ "run_list": ["role[db]"] }
Recipes and Roles go here

82. CHEF HEIRARCHY
Node
Roles Cookbooks
Cookbooks
Recipes Attributes Templates Definitions

83. A ROLE
# ./roles/db.rb
name "database"
description "Be a DB"
run_list [ "apache2", "mysql::server" ]

84. A ROLE
# ./roles/db.rb
name "database"
Recipes to run
description "Be a DB"
run_list [ "apache2", "mysql::server" ]

85. A ROLE
# ./roles/db.rb
name "database"
description "Be a DB"
run_list [ "apache2", "mysql::server" ]
./cookbooks/apache2/recipes/default.rb

86. A ROLE
# ./roles/db.rb
name "database"
description "Be a DB"
run_list [ "apache2", "mysql::server" ]
./cookbooks/mysql/recipes/server.rb

87. CHEF HEIRARCHY
Node
Roles Cookbooks
Cookbooks
Recipes Attributes Templates Definitions

88. ATTRIBUTES
# ./cookbooks/mysql/attributes/server.rb
default[:mysql][:server_debian_password] = secure_password
default[:mysql][:server_root_password] = secure_password
default[:mysql][:server_repl_password] = secure_password
default[:mysql][:bind_address] = ipaddress
default[:mysql][:datadir] = "/var/lib/mysql"
# Tunables
default[:mysql][:tunable][:key_buffer] = "250M"
default[:mysql][:tunable][:max_connections] = "800"
default[:mysql][:tunable][:wait_timeout] = "180"

89. OVERRIDING ATTRIBUTES
Node
// ./config/db.json
{ "mysql": { "server_root_password": "beefcake" },
"recipes": [ "mysql" ] }
Role
# ./roles/db.rb
name "database"
description "Be a DB"
run_list [ "mysql::server" ]
default_attributes :mysql => { :server_root_password =>
"beefcake" }

90. CHEF HEIRARCHY
Node
Roles Cookbooks
Cookbooks
Recipes Attributes Templates Definitions

91. THE RECIPE... PART 1
# ./cookbooks/mysql/recipes/server.rb
include_recipe "mysql::client"

92. THE RECIPE... PART 2
package "mysql-server" do
action :install
end

93. THE RECIPE... PART 3
template "/etc/mysql/my.cnf" do
source "my.cnf.erb"
owner "root"
group "root"
mode "0644"
notifies :restart,
resources(:service => "mysql"),
:immediately
end

94. CHEF HEIRARCHY
Node
Roles Cookbooks
Cookbooks
Recipes Attributes Templates Definitions

95. A TEMPLATE SAMPLE
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = <%= @datadir %>
bind-address = <%= @node[:mysql][:bind_address] %>

96. A TEMPLATE SAMPLE
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = <%= @datadir %>
bind-address = <%= @node[:mysql][:bind_address] %>
OMG, ERB!!

97. A TEMPLATE SAMPLE
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = <%= @datadir %>
bind-address = <%= @node[:mysql][:bind_address] %>
From Attributes

98. A TEMPLATE SAMPLE
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = <%= @datadir %> From Template
bind-address = <%= @node[:mysql][:bind_address] %>

99. ASSIGNING VARIABLES
template "/etc/mysql/my.cnf" do
source "my.cnf.erb"
owner "root"
group "root"
mode "0644"
variables :datadir => “/var/lib/mysql”
end

100. CHEF HEIRARCHY
Node
Roles Cookbooks
Cookbooks
Recipes Attributes Templates Definitions

101. DEFINITIONS
define :apache_conf do
dir = node[:apache][:dir]
template "#{dir}/mods-available/#{params[:name]}.conf" do
source "mods/#{params[:name]}.conf.erb"
notifies :restart, resources(:service => "apache2")
end
end
# In your recipe
apache_conf "mod_ssl"

102. LET’S
WRAP
IT U P
http://www.flickr.com/photos/andresthor/3946773501/sizes/l/in/photostream/

103. AUTOMATE EVERYTHING!!
http://www.flickr.com/photos/kenfagerdotcom/3409813881/

104. Deploying == Provisioning

105. USE CHEF!!!!!
http://www.flickr.com/photos/martin_borjesson/4083726805/sizes/o/

106. ON THE INTERNETS

107. ON THE INTERNETS
•twitter - @cashion

108. ON THE INTERNETS
•twitter - @cashion
•github - http://github.com/trotter

109. ON THE INTERNETS
•twitter - @cashion
•github - http://github.com/trotter
•email - cashion on the gmailz

110. DOMO ARIGATO
http://www.flickr.com/photos/dancoulter/21042744/sizes/o/

111. RESOURCES

112. RESOURCES
• http://wiki.opscode.com/display/chef/Resources

113. RESOURCES
• http://wiki.opscode.com/display/chef/Resources
•#chef on freenode

114. RESOURCES
• http://wiki.opscode.com/display/chef/Resources
•#chef on freenode
•cashion@gmail.com