script.sh

#!/bin/bash
sudo apt-get update
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get install -y docker-ce=5:19.03.15~3-0~ubuntu-bionic docker-ce-cli=5:19.03.15~3-0~ubuntu-bionic containerd.io apt-transport-https

cat << EOF > daemon.json
{
 "exec-opts": ["native.cgroupdriver=systemd"],
 "log-driver": "json-file",
 "log-opts": {
 "max-size": "100m"
 },
 "storage-driver": "overlay2"
}
EOF

sudo mv daemon.json /etc/docker/

sudo mkdir -p /etc/systemd/system/docker.service.d
sudo systemctl daemon-reload
sudo systemctl restart docker

cat <<EOF > k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo mv k8s.conf /etc/sysctl.d/

sudo sysctl --system
sudo lsmod | grep br_netfilter

sudo sh -c "echo 'deb http://apt.kubernetes.io/ kubernetes-xenial main' >> /etc/apt/sources.list.d/kubernetes.list"
sudo sh -c "curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -"
sudo apt-get update
sudo apt-get install -y kubeadm=1.20.1-00  kubelet=1.20.1-00  kubectl=1.20.1-00 
sudo apt-mark hold kubelet kubeadm kubectl

sudo swapoff -a
sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab