eks-managed-nodegroup

Create EKS cluster using managed nodegroup. Then performed EKS control plane upgrades.

Versions and upgrade notes

Based on 1-4 t3.medium worker node with no app pods

eks-ver	coredns	kube-proxy	vpc-cni	AMI-version	upgrade notes
1.25	v1.9.3-eksbuild.10	v1.25.16-eksbuild.1	v1.15.4-eksbuild.1	1.25.15-20231201	N/A
1.26	v1.9.3-eksbuild.10	v1.26.11-eksbuild.1	v1.15.4-eksbuild.1	1.26.10-20231201	from 1.25, set cluster_version = "1.26". nodes are recreated. 23min
1.27	v1.10.1-eksbuild.6	v1.27.6-eksbuild.2	v1.15.4-eksbuild.1	1.27.7-20231201	from 1.26, set cluster_version = "1.27". nodes are recreated. 16min
1.28	v1.10.1-eksbuild.6	v1.28.4-eksbuild.1	v1.15.4-eksbuild.1	1.28.3-20231201	from 1.27, set cluster_version = "1.28". nodes are recreated. 26min