DevOps Classroom Series – 02/Jun/2021

Cookbook Improvements

• Raise an error message when cookbook is executed on unsupported platforms Refer Here for the changes

• Supporting multiple operating systems/distributions for a cookbook

• Lets support for RedHat 8:

  • Manual commands:

  sudo dnf update
  sudo dnf install httpd -y
  sudo systemctl enable httpd.service
  sudo systemctl start httpd.service
  sudo dnf install php php-mysqlnd php-mbstring php-opcache php-gd -y
  echo "<?php phpinfo(); ?>" | sudo tee /var/www/html/info.php
  

• Refer Here for the change set with support for redhat

• Reusing the resources rather than copying (redundant)

• only_if and not_if gaurds to imporve readability

  • Consider the below resource

    if node['platform'] == 'ubuntu'
        apt_update 'update ubuntu packages' do
            ignore_failure true
            action :update
        end
    end
  

  • Can be written as

    apt_update 'update ubuntu packages' do
        ignore_failure true
        action :update
        only_if { node['platform'] == 'ubuntu' }
    end
    

• Created one recipe apache which works on both ubuntu and redhat distributions Refer Here for the changes made