[aws-eks] eks.Cluster.addCapacity is Unable to determine AMI from AMI map since stack is region-agnostic

[Console32]

• I'm submitting a ...

  • 🪲 bug report
  • 🚀 feature request
  • 📚 construct library gap
  • ☎️ security issue or vulnerability => Please see policy
  • ❓ support request => Please see note at the top of this template.

• What is the current behavior?

eks.Cluster.addCapacity does result in the following Error when running cdk synth

Error: Unable to determine AMI from AMI map since stack is region-agnostic
at EksOptimizedAmi.getImage (C:\Users\rschn\Source\KubernetesCdk\node_modules@aws-cdk\aws-ec2\lib\machine-image.ts:251:13)
at new AutoScalingGroup (C:\Users\rschn\Source\KubernetesCdk\node_modules@aws-cdk\aws-autoscaling\lib\auto-scaling-group.ts:398:44)
at Cluster.addCapacity (C:\Users\rschn\Source\KubernetesCdk\node_modules@aws-cdk\aws-eks\lib\cluster.ts:263:17)
at new EksClusterStack (C:\Users\rschn\Source\KubernetesCdk\stack\eks-cluster-stack.ts:18:31)
at Object. (C:\Users\rschn\Source\KubernetesCdk\stack\main.ts:7:1)
at Module._compile (internal/modules/cjs/loader.js:816:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:827:10)
at Module.load (internal/modules/cjs/loader.js:685:32)
at Function.Module._load (internal/modules/cjs/loader.js:620:12)
at Function.Module.runMain (internal/modules/cjs/loader.js:877:12)

Stack to reproduce the issue:

import cdk = require('@aws-cdk/core');
import ec2 = require('@aws-cdk/aws-ec2');
import eks = require('@aws-cdk/aws-eks');

export class CdkTestStack extends cdk.Stack {
  constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    const vpc = new ec2.Vpc(this, 'vpc')
    const cluster = new eks.Cluster(this, 'cluster', { vpc })

    const workerAsg = cluster.addCapacity('Nodes', {
      instanceType: new ec2.InstanceType('t2.small'),
      desiredCapacity: 2,
    });
  }
}

• What is the expected behavior (or behavior of feature suggested)?

the stack should create a new AutoScalingGroup for the cluster, using the the EksOptimizedAmi.

• Please tell us about your environment:

  • CDK CLI Version: 0.36.0
  • Module Version: 0.36.0
  • OS: Windows 10
  • Language: TypeScript

[lkoniecz]

@Console32
solution here #3120

[eladb]

You can also use the CDK_DEFAULT_REGION and CDK_DEFAULT_ACCOUNT to associate the stack with the CLI's env:

DeploymentStack(
  app=app, 
  id='Dev', 
  env={
    'account': os.environ['CDK_DEFAULT_ACCOUNT'], 
    'region': os.environ['CDK_DEFAULT_REGION']
  }
)