AWS — CloudFormation

What is CloudFormation?

Service for modeling and provisioning AWS resources.

Template structure

AWSTemplateFormatVersion: '2010-09-09'
Description: My CloudFormation Stack

Resources:
  MyBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: my-unique-bucket-name
      VersioningConfiguration:
        Status: Enabled

Create stack

aws cloudformation create-stack \
  --stack-name my-stack \
  --template-body file://template.yaml

Update stack

aws cloudformation update-stack \
  --stack-name my-stack \
  --template-body file://template.yaml

Delete stack

aws cloudformation delete-stack --stack-name my-stack

Parameters

Parameters:
  BucketName:
    Type: String
    Description: S3 bucket name

Resources:
  MyBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Ref BucketName

Outputs

Outputs:
  BucketArn:
    Value: !GetAtt MyBucket.Arn
    Export:
      Name: MyBucketArn

Stack sets

aws cloudformation create-stack-set \
  --stack-set-name my-stack-set \
  --template-body file://template.yaml

aws cloudformation create-stack-instances \
  --stack-set-name my-stack-set \
  --accounts [123456789012] \
  --regions [us-east-1,us-west-2]

Best practices

1. Use version control
2. Test changes first
3. Use parameters for flexibility
4. Set up drift detection

Mini Practice

1. Create a simple template
2. Deploy a stack
3. Update the stack
4. Use parameters

Up Next

Continue with API Gateway - API Management.