Attributes in CHEF

Prerequisite: https://bansalkushagra.medium.com/how-to-create-a-cookbook-and-recipe-in-chef-ae62e9ba8156

Types of Attributes (Priority Based):

A. Default

B. Force-default

C. normal

d. override

E. force-override

f. automatic

The attribute is key-value pair that represents a specific detail about a node. It is used to find the state of the node was at the end of the previous chef-client run. Or, what state of node should be at the end of the current chef-client run. Attributes are defined by Node, Roles, cookbook, recipe, and Environment.

Implementation:

Step-1: Access your Amazon EC-2 machine and follow the below command:

Command:

Ø sudo su: to go to the root

Ø ohai

Ø ohai ipaddress

Ø ohai memory/total

Ø ohai cpu/o/mhz

Step-2: Finding attributes using cookbook — recipe

Command:

Ø cd cookbooks

Ø cd apache-cookbook

Ø chef generate recipe recipe3

Ø cd .. // now we are inside the cookbooks directory

Ø vi apache-cookbook/ recipes/recipe3.rb

// .rb extension is mandatory

Code:

file ‘/basicinfo’ do

content “This is to get Attributes

HOSTNAME: #{node[‘hostname’]}

IPADDRESS: #{node[‘ipaddress’]}

CPU: #{node[‘cpu’][‘0’][‘mhz’]}

MEMORY: #{node[‘memory’][‘total’]}”

owner ‘root’

group ‘root’

action :create

end

Now, Run the recipe:

Ø chef-client -zr “recipe[apache-cookbook::recipe3]” // execute the recipe