AWS Classroom Series – 27/Sept/2020

Cloudformation contd..

• How to understand the impact of change in cloud formation
  • Navigate to any cloudformation template resource properties and we observe a section Update requires.
  • If Update requires has a value of No Interruption, then changing this value will not impact, but if the value is Replacement then the current resource will be deleted and recreated with new values.
• Now lets deploy the template with public ip address for web and app subnets
• So lets add the output of the webserver as url, So for this we need to work with
  • Ouputs Section Refer Here
  • Function in Cloud formation Refer Here
  • Using Fn::GetAtt Function Refer Here
  • Using Fn::Join Function Refer Here
• These above mentioned changes are included in the following commit of git Refer Here
• The User data fix is over here

Manual Steps for creating the architecture which John wants

1. Create a VPC with Six Subnets
2. Create a autoscaling group for app servers (tomcat)