Developers have created a new application for a multinational pharma company. This application is tested successfully on EC2 instance in the us-west-1 region & now needs to be deployed in the Production environment across the globe. As a SysOps Administrator you need to deploy this application for all accounts within this company & ensure identical configuration across all regions. Whichof the following is a cost-effective and efficient way to have applications deployed in a short time frame?

Answer options:

A.Manually configure this application on EC2 instance in all regions.
B.Create AWS CloudFormation StackSets to deploy application on EC2 instance in all regions.
C.Create a script to automatically deploy this application while launching EC2 instance in all regions.
D.Use third party tools to automate deployment of applications on EC2 instance in all regions.

Correct Answer: B
With AWS CloudFormation StackSets, stacks can be created in multiple AWS accounts in different regions using a single AWS CloudFormation Template. In this template, resources are defined along with all parameters. This StackSet can be used to create, update & delete stacks in multiple accounts across regions.
Option A is incorrect as manual configuration will result in additional admin work & deploying on a large number of instances will be a tedious and time-consuming task.
Option C is incorrect as creating scripts can be error prone & will need additional efforts to validate all scripts before deployment.
Option D is incorrect as using a third-party tool will incur additional costs.
For more information on creating AWS CloudFormation StackSets, refer to the following URLs-
https://www.youtube.com/watch?v=01hy48R9Kr8
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/what-is-cfnstacksets.html