Enable CA
The Cluster Autoscaler component has been pre-installed in the EKS cluster but is scaled down to 0. Now, let's scale up the replica count:
~$kubectl scale --replicas=1 -n kube-system \
     deployment/cluster-autoscaler-aws-cluster-autoscaler
~$kubectl rollout status \
     deployment/cluster-autoscaler-aws-cluster-autoscaler \
     -n kube-system --timeout 180s