AWS introduced account-regional namespaces for S3, fixing global bucket name collisions that broke IaC automation for 18 years. New format: {prefix}-{account-id}-{region}-an. CloudFormation gets the BucketNamePrefix property, and IAM gets the s3:x-amz-bucket-…
AWS S3 Introduces Account-Regional Namespaces, Ending 18 Years of Global Bucket Name Collisions
AWS S3 introduced account-regional namespaces to resolve 18 years of global bucket name collisions, which disrupted Infrastructure as Code (IaC) automation for AWS users. The change affects AWS S3 bucket naming conventions and requires updates to CloudFormation and IAM policies to restore functionality and prevent naming conflicts.