eks: cannot deploy multiple EKS clusters within the same stack

[badmintoncryer]

Describe the bug

We cannot use multiple EKS clusters within the same stack.

It seems that the cause is the hardcoded ID of the KubectlLayer.

Regression Issue

• [ ] Select this option if this issue appears to be a regression.

Last Known Working CDK Version

2.160.0

Expected Behavior

Deploys successfully.

Current Behavior

Fails to deploy.

Reproduction Steps

import * as eks from 'aws-cdk-lib/aws-eks';
import * as ec2 from 'aws-cdk-lib/aws-ec2';
import { getClusterVersionConfig } from './integ-tests-kubernetes-version';

class MultipleEksClusterStack extends Stack {
  constructor(scope: App, id: string) {
    super(scope, id);

    const vpc = new ec2.Vpc(this, 'Vpc', { natGateways: 1 });
    new eks.Cluster(this, 'EnabledCluster', {
      vpc,
      ...getClusterVersionConfig(this, eks.KubernetesVersion.V1_30),
      bootstrapSelfManagedAddons: true,
    });
    new eks.Cluster(this, 'DisabledCluster', {
      vpc,
      ...getClusterVersionConfig(this, eks.KubernetesVersion.V1_30),
      bootstrapSelfManagedAddons: false,
    });
  }
}

Results

/Users/kazuhoshinozuka/git/aws-cdk/node_modules/constructs/lib/construct.js:375
            throw new Error(`There is already a Construct with name '${childName}' in ${typeName}${name.length > 0 ? ' [' + name + ']' : ''}`);
            ^

Error: There is already a Construct with name 'KubectlLayer' in MultipleEksClusterStack [EksClusterStack]
    at Node.addChild (/Users/kazuhoshinozuka/git/aws-cdk/node_modules/constructs/lib/construct.js:375:19)
    at new Node (/Users/kazuhoshinozuka/git/aws-cdk/node_modules/constructs/lib/construct.js:38:21)
    at new Construct (/Users/kazuhoshinozuka/git/aws-cdk/node_modules/constructs/lib/construct.js:426:21)
    at new Resource (/Users/kazuhoshinozuka/git/aws-cdk/packages/aws-cdk-lib/core/lib/resource.js:32:9)
    at new LayerVersion (/Users/kazuhoshinozuka/git/aws-cdk/packages/aws-cdk-lib/aws-lambda/lib/layers.js:57:9)
    at new KubectlV30Layer (/Users/kazuhoshinozuka/git/aws-cdk/node_modules/@aws-cdk/lambda-layer-kubectl-v30/lib/kubectl-layer.js:13:9)
    at getClusterVersionConfig (/Users/kazuhoshinozuka/git/aws-cdk/packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ-tests-kubernetes-version.js:27:23)
    at new EksClusterStack (/Users/kazuhoshinozuka/git/aws-cdk/packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-bootstrap-self-managed-addons.js:19:77)
    at Object.<anonymous> (/Users/kazuhoshinozuka/git/aws-cdk/packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-bootstrap-self-managed-addons.js:25:15)
    at Module._compile (node:internal/modules/cjs/loader:1546:14)

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

2.160.0

Framework Version

No response

Node.js Version

v22.9.0

OS

macOS

Language

TypeScript

Language Version

No response

Other information

No response

[xazhao]

Hi @badmintoncryer thanks for raising this issue. It's one of current aws-eks limitations. See this for detail.

We are planning to address the issue in the new eksv2 though. This is the tracking RFC: https://github.com/aws/aws-cdk-rfcs/issues/605

[badmintoncryer]

@xazhao Thank you for your detail information! I understand very well.