AWS Classroom notes 24/Dec/2023

Infra Provisioning using Cloud formation

• Cloud formation is infra provisioning tool used to create AWS resources.
• Here we can express desired state in json or yaml.
• The input to cloudformation is a file
• Cloudformation template syntax Refer Here
• Ensure the following extension is installed in visual studio code
  

Activity 1: Lets create an s3 bucket using Cloud formation

• Resource :
  • s3 bucket
    • name
    • location
• Resource syntax Refer Here
• Template

{
    "AWSTemplateFormatVersion" : "2010-09-09",
    "Resources": {
        "mys3": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "AccessControl": "Private",
                "BucketName": "qtcftestdec23"
            }
        }

    }
}

• For screenshots refer classroom video. Create a stack using the above template
  
• If we want to delete all the created resources delete the stack.
• Refer Here for the changes
• Once the resource is create and if you want to change certain values in a resource
  • check the update requires value.
    • No interruption: if it has no interruptions then the resource can be update in place.
      
    • Replacement: the resource will be recreated (deleted and created)
      

Activity 2:

• Create a vpc with 3 subnets
  
• Refer Here for the changes to add a vpc with a parameter to accept vpc address
  
  
• Lets add the web subnet Refer Here for the changes
  
• Exercise: Add other 2 subnets