Posted On: Jul 12, 2019

AWS VPC Container Networking Interface (CNI) Plugin version 1.5 is now the default CNI for new Kubernetes clusters launched by Amazon EKS.

Version 1.5 of the AW VPC CNI plugin improves the behavior of the WARM_IP_TARGET parameter so that any IPs not assigned to pods will be returned back to the subnet. This lowers overall IP address utilization across the cluster. Additionally, a number of bug fixes improve the overall reliability and performance of the CNI for Amazon EKS clusters. 

To learn more, visit the Amazon EKS documentation and AWS VPC CNI v1.5 release notes on GitHub. You can upgrade your existing clusters to use version 1.5 of the AWS VPC CNI plugin by following the instructions in the Amazon EKS documentation.