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If you haven't then you will need to deploy the Cluster Autoscaler: https://docs.aws.amazon.com/eks/latest/userguide/autoscaling.html

Oh, thanks! I was suspecting that is a case but was hoping that is automatically created when I set min and max cluster options. Is there any pulumi example of deploying cluster autoscaler?

You can use the

pulumi-kubernetes

module to deploy the CAS yaml to the cluster: https://www.pulumi.com/registry/packages/kubernetes/api-docs/yaml/configfile/

What about aws roles and policies? I also need to attach those to eks cluster, right?

Yep