Use instructions - https://gist.github.com/gintsgints/8d049cf122c1f2e49c5805dbce0d4653
# Update packages first
sudo apt-get update
sudo apt-get upgrade -y
apt-get install curl
curl -sfL https://get.k3s.io | sh -
# Check for Ready node,
takes maybe 30 seconds
sudo k3s kubectl get node
# get token for nodes
sudo cat /var/lib/rancher/k3s/server/node-token
https://github.com/rancher/k3s/releases/latest
# connect to master
sudo k3s agent --server https://master:6443 --token ${NODE_TOKEN}