Hands on creating a S3 bucket

• We're going to create a simple EC2 instance.
• Then we're going to create to add an Elastic IP to it
• And we're going to add two security groups to it

Implementation

Click Here for tutorial

AWS CloudFormation Template reference (opens in a new tab)

Create a S3 bucket.

Resources:
  MyS3Bucket:
    Type: "AWS::S3::Bucket"
    Properties: {}

Add access control

We'll consider two types of updates:

Case 01: Updates with no interruption (adding AccessControl)

Resources:
  MyS3Bucket:
    Type: "AWS::S3::Bucket"
    Properties:
      AccessControl: PublicRead

Case 02: Replacements updates, such as updating the name of the bucket.

Resources:
  MyS3Bucket:
    Type: "AWS::S3::Bucket"
    Properties:
      AccessControl: PublicRead
      BucketName: "foofoo-bucket-name"

If we try to update the changes. You notice in the preview page it says - Replacement - True that means it will replace entire bucket with a new one. It result the loss in data.

CloudFormation doesn't create replica by itself to preserve your data, it just do whatever you say. A user will be responsible in case if he/she lose data.