K8s - 2 集群搭建 - 4 集群卸载

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K8s - 目录

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一、kubeadm 集群卸载

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二、二进制 集群卸载

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三、高可用 集群卸载

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1. kubeadm reset

全量 master 节点执行：

sudo kubeadm reset

输入：

y

输出样例：

[reset] Reading configuration from the cluster...
[reset] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[reset] WARNING: Changes made to this host by 'kubeadm init' or 'kubeadm join' will be reverted.
[reset] Are you sure you want to proceed? [y/N]: y
[preflight] Running pre-flight checks
[reset] Removing info for node "master1" from the ConfigMap "kubeadm-config" in the "kube-system" Namespace
[reset] Stopping the kubelet service
[reset] Unmounting mounted directories in "/var/lib/kubelet"
[reset] Deleting contents of config directories: [/etc/kubernetes/manifests /etc/kubernetes/pki]
[reset] Deleting files: [/etc/kubernetes/admin.conf /etc/kubernetes/kubelet.conf /etc/kubernetes/bootstrap-kubelet.conf /etc/kubernetes/controller-manager.conf /etc/kubernetes/scheduler.conf]
[reset] Deleting contents of stateful directories: [/var/lib/etcd /var/lib/kubelet /var/lib/dockershim /var/run/kubernetes /var/lib/cni]

The reset process does not clean CNI configuration. To do so, you must remove /etc/cni/net.d

The reset process does not reset or clean up iptables rules or IPVS tables.
If you wish to reset iptables, you must do so manually by using the "iptables" command.

If your cluster was setup to utilize IPVS, run ipvsadm --clear (or similar)
to reset your system's IPVS tables.

The reset process does not clean your kubeconfig files and you must remove them manually.
Please, check the contents of the $HOME/.kube/config file.
[root@master1 ~]# kubectl get po
Error from server (InternalError): an error on the server ("") has prevented the request from succeeding

手动清除相关配置文件：

sudo rm -rf /etc/cni/net.d
sudo rm -rf $HOME/.kube/config

手动清除相关路由：

sudo route -n
sudo ifconfig cni0 down
sudo ip link delete cni0
sudo ifconfig flannel.1 down
sudo ip link delete flannel.1
sudo route -n

清除组件配置文件、证书等：

sudo rm -rvf ~/.kube/
sudo rm -rvf /etc/kubernetes/
sudo rm -rvf /etc/systemd/system/kubelet.service.d
sudo rm -rvf /etc/systemd/system/kubelet.service
sudo rm -rvf /etc/cni
sudo rm -rvf /opt/cni
sudo rm -rvf /var/lib/etcd
sudo rm -rvf /var/etcd