All nodes pre-requisites

Network configuration

# Network setup
vi /etc/netplan/50-cloud-init.yaml
netplan apply

Software pre-requisites

# Upgrade packages
sudo apt update
sudo apt upgrade -y

# Install software pre-requisites
sudo apt-get install python3-pip gcc nfs-common -y

NTP time

sudo apt-get install ntp -y
# check configured servers in:
sudo vi /etc/ntp.conf
# restart services if needed:
sudo /etc/init.d/ntp restart
# check ntp status:
ntpq -p