The author shares a misstep during an AWS migration from IAM Users to SSO, resulting in a permissions error related to a KMS key. After discovering the issue, they detail the recovery process and a new checklist step to prevent similar problems in the future.

Migrating Amazon EKS from version 1.29 to 1.32 involved careful planning and execution, focusing on upgrading Terraform modules, transitioning to Amazon Linux 2023, and implementing a blue/green deployment strategy to minimize downtime. The process highlighted the importance of addressing breaking changes, updating add-ons, and validating instance types to ensure a smooth upgrade across four clusters. Overall, the upgrade was completed in two weeks with minimal disruptions and enhanced security and performance.