terraform-aws-eks-vpc-cni-custom-networking

This terraform module configures aws eks vpc cni k8s custom networking to assign non-routable ip's from the 100.64.0.0/10 and 198.19.0.0/16 secondary CIDR ranges to kubernetes pods.

This module must be applied to an existing cluster.

This module automates the process described in these docs on setting up custom networking.

Usage

Example input to set up secondary cidr ranges in 4 az's

cluster_name = "mycluster"
vpc_id       = "vpc-123123abcabc"

secondary_cidr = "100.64.0.0/16"
secondary_subnets = {
  us-east-1a = "100.64.0.0/18"
  us-east-1b = "100.64.64.0/18"
  us-east-1c = "100.64.128.0/18"
  us-east-1d = "100.64.192.0/18"
}

Don't forget to configure kubectl provider if necessary. Example:

provider "kubectl" {
  config_path    = "~/.kube/config"
  config_context = data.aws_eks_cluster.this.arn
}