if [ ${K8S_VERSION_CURRENT:-v0.0.0} = ${K8S_VERSION_LATEST#v} ];
	then
		echo nothing to do
		exit 0
fi

sudo apt install -y kubeadm=${K8S_VERSION_LATEST#v}-00
sudo kubeadm upgrade apply -y ${K8S_VERSION_LATEST}
sudo apt install -y kube{let,ctl}=${K8S_VERSION_LATEST#v}-00
sudo apt autoremove -y
sudo apt autoclean
sudo journalctl --vacuum-time=3d