Exercise-1 : Create S3 bucket using CF Template

• Lets start with minimal template

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "Exercise-1: Create S3 bucket",
    "Resources": {
        
    }
}

• Now we need to create s3 bucket which is a resource.
• In cf to create a resource there is a special syntax

 "resourceName": {
            "Description": "-",
            "Type": "-",
            "Properties": "-"
        }

• resourceName is the name given for the usage with in cloud formation.

"qtstorage" : {
    Description
    ...
    ...
}

"qtstorage" will not be name of your resource in aws i.e. qtstorage will not be s3 bucket name

• To get aws s3 resource definition navigate to google search and type aws cloudformation s3 or search for the service/resource type in here
• We had written the following sample template

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "Exercise-1: Create S3 bucket",
    "Resources": {
        "mys3bucket": {
            "Type" : "AWS::S3::Bucket",
            "Properties": {
                "BucketName": "qts3fromcfdemo"
            }
        }

    }
}

• Stack: Template when executed to create resources. Stack will create all the resources on success and none on failure
• Deleting the stack is deleting all the resources created by using template.

Exercise-2 Create an S3 bucket with some name and then change the name of the bucket

• Create an Stack with the following template

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "Exercise-1: Create S3 bucket",
    "Resources": {
        
        "myqtstorage": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "AccessControl": "PublicRead",
                "BucketName": "qts3fromclidemo"
            }
        }
    }
}

• Now change the name of the bucket from qts3fromclidemo to qts3fromclidemo1. Before we change this we need to understand the Replacement.
  • Navigate to here.
  • Go to the BucketName and look at Update Requires section. If the Update Requires has a value of
    • Replacement: resource will be deleted and recreated with new property
    • No Interruption: the property will be updating without deleting

Exercise 3: Write a CF template to create s3 bucket and vpc with cidr range of 192.168.0.0/16