DevOps Classroom Series – 20/Jan/2021

Scenario: Configure LAMP Server

• Linux Apache Server and mysql (LAMP Stack)
  • Ubuntu Refer Here
  • Centos 7 Refer Here
• Generate a cookbook
• Now lets generate a recipe for installing lamp in ubuntu server
• Now lets configure kitchen.yaml file to create an ubuntu instance in aws
• Refer Here for the change set
• Now lets execute kitchen create
• Now lets write down manual linux commands to be executed to configure lamp server

sudo apt update
sudo apt install apache2
sudo apt install php libapache2-mod-php php-mysql php-cli
sudo systemctl restart apache2
# Create a file in /var/www/html/info.php with the following content
<?php
phpinfo();
?>

• In Chef to perform steps we have resource. Resource is a statement of configuration that describes the desired state
• Resource Syntax

type 'name' do
   attribute 'value'
   action :type_of_action
end

• Refer Here for chef resource documentation
• Refer Here for the Resources reference
• We can find resource for manual command
  • by searching in resources section
  • by searching in google
• Ensure Chef Extension to Visual studio code is installed
• To install visual studio and other softwares required Refer Here
• Refer Here for the first step automation & now lets converge using kitchen converge
• Now lets move to the next step Refer Here for the changeset. Now lets converge
• Now lets verify if apache is installed or not
• Now lets try to configure for the step sudo apt install php libapache2-mod-php php-mysql php-cli -y
• Refer Here for the changes and perform convergence
• Refer Here for the changes and perform convergence
• We were able to perform lamp installation on ubuntu and verify it manually using test kitchen
• Our cookbook might not be effective at this point of time
  • Our recipe has to use loops to become effective
  • Our cookbook is restarting apache during every convergane which is not a good sign
• So in our next session we will learn how to overcome this and also learn more about chef resources
• Exercise: Create a new recipe lamp_centos and try to automate the steps mentioned Refer Here
  • AMI ID for centos 7 in us-west-2 is ami-0bc06212a56393ee1