1. Cooking With
Juri Timoshin @

2. Chef is a systems integration
framework

Ruby

Write recipe that describes
a role

Integration through System or
API calls

Powerful search to discover info
about already existing
infrastructure

3. Architecture Introduction

4. Managing Tools

Knife
knife sub-command [ARGUMENTS] (options)

Shef

Management
Console

5. Recipe and Cookbook

6. Resources

Discrete chunk of a system's configuration
(i.e. file, script, package)

Cross platform abstraction (i.e. package
supports: apt, yum, zipper, rpm, macports ...)
apt-get install tar
package "tar" do
action :install yum install tar
end rpm -i tar

7. Providers

Takes Resource

Compares it to existing one

Takes action specified

Code in platform.rb

8. Installation

Ruby Gem

Apt Package
(Ubuntu, Debian)

Knife Bootstrap
(For Nodes)

9. Enough Talking!

10. Anatomy Of Chef Run

Convergence

Compile - Resource Collection

Execute - Configure Node

11. Lightweight Resources and
Providers (LWRP)
CBNAME/resources/mercurial.rb
actions :sync, :clone
attribute :path, :kind_of => String, :name_attribute => true
attribute :repository, :kind_of => String, :required => true
attribute :revision, :kind_of => [Integer, String], :default => 'tip'
attribute :user, :kind_of => String, :required => true
attribute :group, :kind_of => String, :required => true
attribute :mode, :kind_of => String, :default => '0775'

12. LWRP Continued
CBNAME/providers/mercurial.rb
action :clone do
bash "clone repository" do
action :nothing
user new_resource.user
group new_resource.group
environment ({'HOME' => Etc.getpwnam(new_resource.user).dir})
creates "#{new_resource.path}/.hg"
code "hg clone -r #{new_resource.revision} #{new_resource.repository}
#{new_resource.path}"
end.run_action :run
end
CBNAME_mercurial 'Some uniq name' do
Usage (in any cookbook that repository "https://some.repo.url/some/path"
depends on our CBNAME): action :clone
user 'jt'
group 'jt'
end

13. Links

Wiki (http://wiki.opscode.com/)

Community (http://community.opscode.com/)
●
Cookbooks
●
Blogposts
●
FAQ
●
Links

Source Code https://github.com/opscode/chef

14. Thank You!

Email: juri.timoshin@zeroturnaround.com

Blog: http://dracoater.blogspot.com/

G+: Juri Timošin