Posted On: Oct 25, 2018<\/p>\n
Amazon Elastic Container Service for Kubernetes (EKS) now allows clusters to be created in a Amazon VPC addressed with additional IPv4 CIDR blocks in the 100.64.0.0\/10 and 198.19.0.0\/16 ranges. This allows customers additional flexibility in configuring the networking for their EKS clusters.<\/p>\n
The CIDR blocks supported by Amazon VPC are here<\/a>, in the table titled IPv4 CIDR Block Association Restrictions. <\/b><\/p>\n Previously, EKS customers could only create clusters in VPCs that were addressed with RFC 1918 private IP address ranges<\/a>. This meant customers were often unable to allocate sufficient private IP address space to support the number of Kubernetes pods managed by EKS.<\/p>\n Now, customers can create EKS clusters in Amazon VPCs addressed with CIDR blocks in the 100.64.0.0\/10 and 198.19.0.0\/16 ranges. This gives customers more available IP addresses for their pods managed by Amazon EKS and more flexibility for networking architectures. Additionally, by adding secondary CIDR blocks to a VPC<\/a> from the 100.64.0.0\/10 and 198.19.0.0\/16 ranges, in conjunction with the CNI Custom Networking feature<\/a>, it is possible for pods to no longer consume any RFC 1918 IP addresses in a VPC.<\/p>\n For more information about Amazon EKS networking, visit the documentation<\/a>.<\/p>\n Please visit the AWS region table to see all AWS regions where Amazon EKS is available.<\/p>\n