terraform-aws-eks/examples/eks-managed-node-group/eks-bottlerocket.tf

module "eks_bottlerocket" {
  source  = "terraform-aws-modules/eks/aws"
  version = "~> 21.0"

  name               = "${local.name}-bottlerocket"
  kubernetes_version = "1.33"

  # EKS Addons
  addons = {
    coredns = {}
    eks-pod-identity-agent = {
      before_compute = true
    }
    kube-proxy = {}
    vpc-cni = {
      before_compute = true
    }
  }

  vpc_id     = module.vpc.vpc_id
  subnet_ids = module.vpc.private_subnets

  eks_managed_node_groups = {
    example = {
      ami_type       = "BOTTLEROCKET_x86_64"
      instance_types = ["m6i.large"]

      min_size = 2
      max_size = 5
      # This value is ignored after the initial creation
      # https://github.com/bryantbiggs/eks-desired-size-hack
      desired_size = 2

      # This is not required - demonstrates how to pass additional configuration
      # Ref https://bottlerocket.dev/en/os/1.19.x/api/settings/
      bootstrap_extra_args = <<-EOT
        # The admin host container provides SSH access and runs with "superpowers".
        # It is disabled by default, but can be disabled explicitly.
        [settings.host-containers.admin]
        enabled = false

        # The control host container provides out-of-band access via SSM.
        # It is enabled by default, and can be disabled if you do not expect to use SSM.
        # This could leave you with no way to access the API and change settings on an existing node!
        [settings.host-containers.control]
        enabled = true

        # extra args added
        [settings.kernel]
        lockdown = "integrity"
      EOT
    }
  }

  tags = local.tags
}