EKS HPA based on basic metric such as CPU

1.Terraform code in service.tf:

       

resource "kubernetes_horizontal_pod_autoscaler" "co-ec-hpa" {
  for_each = var.service_parameters
  metadata {
    name = each.value.desc
  }
  spec {
    max_replicas                      = each.value.service_hpa_max
    min_replicas                      = each.value.service_hpa_min
    target_cpu_utilization_percentage = 60 // TODO
    scale_target_ref {
      api_version = "extensions/v1beta1"
      kind        = "Deployment"
      name        = "${each.value.name}-${var.eks_cluster_name}"
    }
  }
}

       
 

2. Install Metrics Server

DOWNLOAD_URL=$(curl -Ls "https://api.github.com/repos/kubernetes-sigs/metrics-server/releases/latest" | jq -r .tarball_url)DOWNLOAD_VERSION=$(grep -o '[^/v]*$' <<< $DOWNLOAD_URL)curl -Ls $DOWNLOAD_URL -o metrics-server-$DOWNLOAD_VERSION.tar.gz
mkdir metrics-server-$DOWNLOAD_VERSION
tar -xzf metrics-server-$DOWNLOAD_VERSION.tar.gz --directory metrics-server-$DOWNLOAD_VERSION --strip-components 1kubectl apply -f metrics-server-$DOWNLOAD_VERSION/deploy/1.8+/
rm metrics-server-$DOWNLOAD_VERSION.tar.gz
rm -rf metrics-server-$DOWNLOAD_VERSION

3. Check the pod under 'kube-system' name space

kube-system         metrics-server-7fcf9cc98b-eeeee                                   1/1     Running   0          47h


Reference

https://docs.aws.amazon.com/eks/latest/userguide/horizontal-pod-autoscaler.html#hpa-install-metrics-server

(For HPA based on external metrics, please contact me)