This document introduces the Chef automation tool and its components, including cookbooks, recipes, and nodes. It explains the use of knife CLI for managing cookbooks and details the process for creating a cookbook and bootstrapping a node. Additionally, it outlines Chef's architecture, concepts like roles and data bags, and emphasizes the importance of environments in configuration management.

1. -- Rajesh Hegde
Intern @Justeat

2.  Introduction to our New Cook
 Chef Basics
 Write cookbook
 Live Demo
#Includes

3.  Infrastructure as a Code.
 An API for the Infrastructure.
 Continuous Delivery [ Build.. Test.. Deploy.. ].
 Chef uses Ruby as DSL.
 Open Source.
What is chef ..?

4. Automation In Action

5.  Idempotent
 Thick Clients, Thin Server
 Order Matters
Chef Principles

6.  Chef server
 Opscode Hosted chef server
 Private Chef
 Open source chef server
 Chef solo
Flavours of Chef

7. Chef Architecture

8. Chef Server Overview

9. Chef Run
Build
Node
Load
Cookbook
Configure
Node
Save
Node

10.  Knife
 Cookbooks
 Recipes
 Resources
 Roles
 Nodes
 Attributes
 Data bags
 Environments
Components

11.  Knife is a CLI between a local Chef
repository and the Chef Server.
 Knife runs on Workstation.
Knife

12.  Collection of recipes, attributes, templates etc..
 700+ Community Cookbooks are available.
Cookbooks

13.  knife cookbook list
 knife cookbook create COOKBOOK
 knife cookbook download COOKBOOK
 knife cookbook upload [COOKBOOKS...]
 knife cookbook delete COOKBOOK
 knife cookbook site download COOKBOOK
Cookbook Commands

14.  Define everything that is required to configure part
of a system.
 Added to a run-list before it can be used by Chef
 Always executed in the same order as listed in a run-
list
Recipes

15.  Get remote file.
 Apt packages
 Directory
 Link
 Templates
Resources

16.  Define certain patterns and processes to achieve the
goal.
 Collection of run_list and attributes
Roles

17.  A node is any Machine that need to be configured.
 Node Can be :
 Physical
 Virtual
 Cloud Based
Node

18.  Define Variables for chef run.
 Attributes can be overridden according to
precedence.
Attributes

19.  A data bag is a global variable that is stored as JSON
data.
 Accessible from a Chef Server.
 Stores encrypted data.
Data bags

20.  An environment is a way to map an
organization’s real-life workflow to
configuration.
 At least one environment : _default
 Multiple Environments like: testing, staging,
development, production.
Environments

21.  Run this command
 curl -L https://www.opscode.com/chef/install.sh | sudo
bash
 Git clone git://github.com/opscode/chef-repo.git
 mkdir .chef ; cd .chef
 echo "cookbook_path [ ‘path/to/cookbooks' ]" >
.chef/knife.rb
Install Chef

22.  Run Command:
 Knife cookbook create Justeat
That’s it… Your first cookbook is ready…..
First Cookbook

23. Cookbook Structure

24. In metadata.rb:
depends "apache2", ">= 0.99.4"
depends "mysql", ">= 1.0.5"
Cookbook Dependencies

25.  attributes/default.rb
node.default[“justeat”][“first_dir”] = “/etc/justeat”
First Attribute file

26. In recipes/default.rb
directory node[“justeat”][“first_dir”] do
user “root”
recursive true
end
Template “my.cnf” do
source “my.cnf.erb”
variables( :my_port => “3308” )
end
First Recipe

27. knife bootstrap 10.1.1.110 -r 'recipe[apt]' –x username –P
password –sudo
It will install chef client in node and run the recipes
specified in run list.
Bootstrap new Node

28. In solo.rb:
file_cache_path "/vagrant/chef-solo“
cookbook_path "/vagrant/chef-repo/cookbooks“
Run With chef-solo

29. In justeat.json :
{
“run_list” : [“recipe[justeat]”]
}
Run With chef-solo

30.  Now run :
chef-solo –c solo.rb –j justeat.json
 chef will do the needful.
Run With chef-solo

31. Time to go Live..

32. Queries..?

33. Thank You