Shell scripts to deploy and upgrade Kubernetes clusters on Ubuntu
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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