Hello world!

If you see "/var/lib/etcd is not empty" message while initiating Kubernetes, then remove /var/lib/etcd directory.

References

https://github.com/kubernetes/kubeadm/issues/1642

# kubeadm reset

# sudo apt-get purge kubeadm kubectl kubelet kubernetes-cni kube*

# sudo apt-get autoremove

# sudo rm -rf ~/.kube

References

https://stackoverflow.com/questions/44698283/how-to-completely-uninstall-kubernetes

(Recommended) https://medium.com/finda-tech/overview-8d169b2a54ff

https://hiseon.me/linux/ubuntu/ubuntu-kubernetes-install/

https://ssup2.github.io/record/Kubernetes_%EC%84%A4%EC%B9%98_kubeadm_Ubuntu_16.04/

https://etrioss.kr/thkimetri/ksb19.03-manual/blob/a42d53a657b5930007f40c762c0c929c63a2f3a8/manual1903/1.6.KSB_K8s_install_Guide.md

수정 필요

https://git.wisoft.io/seongwon/kubernetes-installation

https://likefree.tistory.com/13

https://coffeewhale.com/kubernetes/cluster/virtualbox/2020/08/31/k8s-virtualbox/

https://www.padok.fr/en/blog/minikube-kubeadm-kind-k3s

# To uninstall K3s from a server node, run:

$ /usr/local/bin/k3s-uninstall.sh

# To uninstall K3s from an agent node, run:

$ /usr/local/bin/k3s-agent-uninstall.sh

References

https://rancher.com/docs/k3s/latest/en/installation/uninstall/

sudo apt-get install -qy kubelet=<version> kubectl=<version> kubeadm=<version>

sudo apt-get install -qy kubelet=1.9.6-00 kubectl=1.9.6-00 kubeadm=1.9.6-00

References

https://stackoverflow.com/questions/49721708/how-to-install-specific-version-of-kubernetes

sudo apt-get purge -y docker-engine docker docker.io docker-ce docker-ce-cli

sudo apt-get autoremove -y --purge docker-engine docker docker.io docker-ce

sudo rm -rf /var/lib/docker /etc/docker

sudo rm /etc/apparmor.d/docker

sudo groupdel docker

sudo rm -rf /var/run/docker.sock

References

https://askubuntu.com/questions/935569/how-to-completely-uninstall-docker