CloudFormation

CloudFormation is a declarative way of outlining your AWS Infrastructure, for any resources (most of them are supported), in the right order, with the exact configuration that you specify
use template to constructure/ update infrastructure (YAML/ JSON)
updating the stack, all the physical resource will also be updated (add new resource, modifying , delete)

Benefits

Infrastructure as code
- No resources are manually created, which is excellent for control
- Changes to the infrastructure are reviewed through code
Cost
- Each resources within the stack is tagged with an identifier so you can easily see how much a stack costs you
- You can estimate the costs of your resources using the CloudFormation template
- Savings strategy: In Dev, you could automation deletion of templates at 5 PM and recreated at 8 AM, safely
Productivity
- Ability to destroy and re-create an infrastructure on the cloud on the fly
- Automated generation of Diagram for your templates!
- Declarative programming (no need to figure out ordering and orchestration)
Don’t re-invent the wheel
- Leverage existing templates on the web
- Leverage the documentation
Supports (almost) all AWS resources:
- can also use “custom resources” for resources that are not supported