This article details the process of migrating K8ssandra clusters from old EKS clusters to new ones without downtime or data loss. It outlines the challenges faced and the custom workflow developed to ensure a smooth transition, including handling data replication and cluster configuration.

Wix successfully reduced its Spark costs by 60% while migrating 5,000 daily workflows from EMR to EMR on EKS. This transition aimed to optimize operational efficiency and manage cloud costs more effectively. Details of the migration process and the strategies employed are discussed in the article.

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.