What is CloudFormation?
AWS CloudFormation is a service which lets you create a template that defines a set of resources and instructions on how to create those resources. CloudFormation aims to provide you with a way to deploy your infrastructure and resources consistently so that the process of deploying your application is frictionless. Consider that you are creating a VPC, subnets, EC2 instances, RDS DB instances, a load balancer, and Auto Scaling Group to host your application either through AWS Console or through CLI. When you need to duplicate the same environment in a different region or different VPC, you have to make all those decisions once again and create those individual resources. This is where CloudFormation plays a vital role. You can define a template with a required action and replay that template as many times as you want to replicate the environments.
The fundamental principle of DevOps is to treat infrastructure as code. CloudFormation provides you with that ability...