Create Amazon EKS with Bottlerocket and Karpener

eksctl-bottlerocket-karpenter.sh

#!/usr/bin/env bash

export CLUSTER_NAME="ruzickap3"
export AWS_DEFAULT_REGION="eu-central-1"
export KUBECONFIG="/tmp/kubeconfig-${CLUSTER_NAME}.conf"

export TAGS="Owner=petr.ruzicka@gmail.com Environment=dev"

set -euxo pipefail

cat > "/tmp/eksctl-${CLUSTER_NAME}.yaml" << EOF
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig
metadata:
  name: ${CLUSTER_NAME}
  region: ${AWS_DEFAULT_REGION}
  version: "1.25"
  tags: &tags
    karpenter.sh/discovery: "${CLUSTER_NAME}"
$(echo "${TAGS}" | sed 's/^/    /g ; s/=\([^,]*\),*/: "\1"\n    /g')
iam:
  withOIDC: true
karpenter:
  version: v0.27.0
  createServiceAccount: true
addons:
  - name: vpc-cni
  - name: kube-proxy
  - name: coredns
  - name: aws-ebs-csi-driver
managedNodeGroups:
  - name: mng01
    amiFamily: Bottlerocket
    # Minimal instance type for running add-ons + karpenter - ARM t4g.medium: 4.0 GiB, 2 vCPUs - 0.0336 hourly
    # Minimal instance type for running add-ons + karpenter - X86 t3a.medium: 4.0 GiB, 2 vCPUs - 0.0336 hourly
    instanceType: t4g.medium
    desiredCapacity: 3
    minSize: 2
    maxSize: 5
    volumeSize: 20
    volumeType: gp3
    disablePodIMDS: true
    tags:
      <<: *tags
    volumeEncrypted: true
    disableIMDSv1: true
EOF

eksctl create cluster --config-file "/tmp/eksctl-${CLUSTER_NAME}.yaml" --kubeconfig "${KUBECONFIG}"

echo -e "*****\n  export KUBECONFIG=${KUBECONFIG} \n*****"