Mastering Service Mesh

Uninstalling Kubernetes and Docker

We've learned how to install and set up Kubernetes. But just if Kuberenetes needs to be uninstalled, what do you do? Follow these steps:

1. Find out the node name using kubectl get nodes:

$ kubectl drain <node name> --delete-local-data --force --ignore-daemonsets$ kubectl delete node <node name>

2. Remove kubeadm:

$ sudo systemctl stop kubelet$ sudo kubeadm reset$ sudo iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X$ sudo yum -y remove kubeadm kubectl kubelet kubernetes-cni kube*$ rm -fr ~/.kube

3. Remove Docker and the images:

$ sudo su -# docker rm -f $(docker ps -qa)# docker volume rm $(docker volume ls -q)# docker rmi $(docker images -q)# systemctl stop docker# rm -fr /var/lib/docker/* ...