Amazon CloudFormation lets you provision and model your AWS service infrastructure declaratively. Instead of using interactive tools such as management console or CLI directly, you can declare the configuration with expected order, dependencies, input, and output in a template, and CloudFormation will provision it for you.

The concept of writing code to manage infrastructure is referred to as Infrastructure as Code (IaC) and is a practice that most enterprise companies follow. You can also maintain the provisioning code in a code repository and follow practices such as code reviews like any other code. Thus, it lets you reuse the provisioning code.

In this recipe, we will use CloudFormation to provision the infrastructure for the Lambda we created in the Your Lambda with AWS CLI recipe.