aws-eks: Support EKS 1.25

[plumdog]

Describe the feature

1.25 is now listed here https://docs.aws.amazon.com/eks/latest/userguide/kubernetes-versions.html#kubernetes-1.25

I think it only landed today, but I can't find an announcement.

I guess this will also need a package from https://github.com/cdklabs/awscdk-asset-kubectl to support 1.25.

[khushail]

Hi @plumdog , Thanks for sharing the latest update on Kubernetes.

For now, I would be marking this as P1. I would reach out to my team for getting updates on latest package inclusion and share the same with you.

[pahud]

Yeah. Before we get 1.25 layer cdklabs/awscdk-asset-kubectl#166 I just tested we still can deploy 1.25 cluster like this.

Please note - using 1.24 kubectl with 1.25 cluster might have some issues.

import { App, Stack, StackProps,
  aws_eks as eks,
  aws_ec2 as ec2 } from 'aws-cdk-lib';
  import { KubectlV24Layer as KubectlLayer } from '@aws-cdk/lambda-layer-kubectl-v24';
  
  import { Construct } from 'constructs';
  
  export class EksTsStack extends Stack {
    constructor(scope: Construct, id: string, props: StackProps = {}) {
      super(scope, id, props);
  
      const vpc = ec2.Vpc.fromLookup(this, 'Vpc', { isDefault: true });
      new eks.Cluster(this, 'Cluster', {
        vpc,
        version: eks.KubernetesVersion.of('1.25'),
        kubectlLayer: new KubectlLayer(this, 'KubectlLayer'),
      })
    }
  }

$ kubectl get no
NAME STATUS ROLES AGE VERSION
ip-172-31-12-128.us-west-2.compute.internal Ready 5m9s v1.25.6-eks-48e63af
ip-172-31-14-191.us-west-2.compute.internal Ready 5m9s v1.25.6-eks-48e63af

$ kubectl -n kube-system get po
NAME READY STATUS RESTARTS AGE
aws-node-4cltv 1/1 Running 0 5m24s
aws-node-9q2zb 1/1 Running 0 5m24s
coredns-67f8f59c6c-gh6lt 1/1 Running 0 11m
coredns-67f8f59c6c-tclrd 1/1 Running 0 11m
kube-proxy-5l89h 1/1 Running 0 5m24s
kube-proxy-rwbl2 1/1 Running 0 5m24s

[AlyIbrahim]

Yes, but I think it is always better to work with kubectl version that matches the Kubernetes cluster version

[plumdog]

You should expect kubectl 1.24 to work with EKS 1.25 without issue because kubectl has a +/-1 minor version skew policy, per https://kubernetes.io/releases/version-skew-policy/#kubectl.

But clearly there ought to be a CDK kubectl layer for 1.25 before the CDK's support for 1.25 could be considered "done".

[github-actions]

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