#dynamodb

Cloud & Infrastructure

AWS us-east-1 outage of October 2025: DynamoDB DNS race and lessons for our systems

Daniel Tran · Nov 11, 2025 · 8 min read

A practitioner's reading of AWS's official summary of the October 19-20, 2025 us-east-1 disruption: a race in DynamoDB's DNS automation left an empty record, and recovery cascaded through EC2, NLB and Lambda. What happened per the report, and what we changed.

DevOps & CI/CD

Moving Terraform state locking from DynamoDB to S3 native locking with use_lockfile

Isabel Ferreira · Sep 22, 2025 · 7 min read

Terraform's S3 backend can lock state with a lock file in the bucket itself, and DynamoDB-based locking is deprecated. How S3 native locking works, the IAM it needs, a safe migration with both mechanisms on during the transition, and the failure modes we tested.