install_k8s.sh

#!/usr/bin/env bash

apt-get update
apt-get install -y apt-transport-https ca-certificates curl vim sudo
curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
apt-get update
apt-get install -y kubelet kubeadm kubectl
curl -fsSL https://get.docker.com/ -o get-docker.sh
sh get-docker.sh

swapoff -a; sed -i '/swap/d' /etc/fstab

After install_k8s.sh generate new token on the contol-plane node:

kubeadm token create --print-join-command

and execute command on the new worker node:

kubeadm join 10.42.6.1:6443 --token xxx.xxixx3xxmxxjxx4x --discovery-token-ca-cert-hash sha256:4242424242424242424242424242424242424242424242424242424242424242