Then update the OS.
apt-get update -y apt-get upgrade -y reboot
Login back into the node and become root.
Add the following to
cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory
Reboot the node.
Copy the SSH keys into the node (replace NODE-IP with the IP address of the node).
Join the node to the k3s cluster (replace NODE-IP with the IP address of the node and SERVER_IP with the IP address of the master).
k3sup join --ip NODE-IP --server-ip SERVER-IP --user pi
And voila you have added a k3s node to your k3s cluster!
Posted February 4th, 2021