aws-cloudformation-s3

# AWS CloudFormation S3 Patterns Provides S3 bucket configurations, policies, versioning, lifecycle rules, and CloudFormation template structure best practices for production-ready infrastructure. ## When to Use - Creating S3 buckets with custom configurations - Implementing bucket policies for access control - Configuring S3 versioning for data protection - Setting up lifecycle rules for data management - Creating Outputs for cross-stack references - Using Parameters with AWS-specific types - Organizing templates with Mappings and Conditions ## Overview S3 bucket configurations, policies, versioning, lifecycle rules, and CloudFormation template structure for production-ready infrastructure. ## Instructions 1. **Define Bucket Resources**: Create `AWS::S3::Bucket` with versioning, encryption, PublicAccessBlock 2. **Configure Bucket Policy**: Set up IAM policies for access control 3. **Set Up Lifecycle Rules**: Define transitions and expiration policies 4. **Configure CORS**: Allow cross-origin requests if needed 5. **Add Outputs**: Export bucket names/ARNs for cross-stack references **Validate before deploy:** ```bash aws cloudformation validate-template --template-body file://template.yaml ``` **Deploy with rollback on failure:** ```bash aws cloudformation deploy \ --template-file template.yaml \ --stack-name my-s3-stack \ --capabilities CAPABILITY_IAM ``` If deployment fails, CloudFormation automatically rolls back. Check failures with: ```bash aws cloudforma...