kubeadm-node.sh

#!/bin/bash
set -x

# 1. Become sudo
sudo su

# 2. Install Docker
apt-get update
apt-get install -y docker.io

# 3. Enable Docker Service
systemctl enable docker.service

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

# 5. Install kubelet, kubeadm, and kubectl
apt-get update && apt-get install -y apt-transport-https curl
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
EOF
apt-get update
apt-get install -y kubelet kubeadm kubectl

# 6. Setup SSH on root for maintenance
apt install -y ssh
passwd
sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config
service ssh restart
exit

set +x

# 7. Join nodes to the cluster
#kubeadm join --token <token> <master-ip>:<master-port> --discovery-token-ca-cert-hash sha256:<hash>