instruction: Create a Kubernetes ClusterConfiguration configuration with best practices
output: ```dockerfile
  from any etcd node in the cluster to the first control plane node:export CONTROL_PLANE="ubuntu@10.0.0.7"
  scp /etc/kubernetes/pki/etcd/ca.crt "${CONTROL_PLANE}":
  scp /etc/kubernetes/pki/apiserver-etcd-client.crt "${CONTROL_PLANE}":
  scp /etc/kubernetes/pki/apiserver-etcd-client.key "${CONTROL_PLANE}":
  Replace the value of CONTROL_PLANE with the user@host of the first control-plane node.Set up the first control plane nodeCreate a file called kubeadm-config.yaml with the following contents:---
  apiVersion: kubeadm.k8s.io/v1beta4
  kind: ClusterConfiguration
  kubernetesVersion: stable
  controlPlaneEndpoint: "LOAD_BALANCER_DNS:LOAD_BALANCER_PORT" # change this (see below)
  etcd:
   external:
   endpoints:
   - https://ETCD_0_IP:2379 # change ETCD_0_IP appropriately
   - https://ETCD_1_IP:2379 # change ETCD_1_IP appropriately
   - https://ETCD_2_IP:2379 # change ETCD_2_IP appropriately
   caFile: /etc/kubernetes/pki/etcd/ca.crt
   certFile: /etc/kubernetes/pki/apiserver-etcd-client.crt
   keyFile: /etc/kubernetes/pki/apiserver-etcd-client.key
  Note:The difference between stacked etcd and external etcd here is that the external etcd setup requires
  a configuration file with the etcd endpoints under the external object for etcd.
  In the case of the stacked etcd topology, this is managed automatically.Replace the following variables in the config template with the appropriate values for your cluster:LOAD_BALANCER_DNSLOAD_BALANCER_PORTETCD_0_IPETCD_1_IPETCD_2_IPThe following steps are similar to the stacked etcd setup:Run sudo kubeadm init --config kubeadm-config.yaml --upload-certs on this node.Write the output join commands that are returned to a text file for later use.Apply the CNI plugin of your choice.Note:You must pick a network plugin that suits your use case and deploy it before you move on to next step.
  If you don't do this, you will not be able to launch your cluster properly.Steps for the rest of the control plane nodesThe steps are the same as for the stacked etcd setup:Make sure the first control plane node is fully initialized.Join each control plane node with the join command you saved to a text file. It's recommended
  to join the control plane nodes one at a time.Don't forget that the decryption key
  ```