[preflight] Some fatal errors occurred: Port 10250 is in use /etc/kubernetes/manifests is not empty /etc/kubernetes/pki is not empty /var/lib/kubelet is not empty /etc/kubernetes/a

[preflight] Some fatal errors occurred:

    Port 10250 is in use

    /etc/kubernetes/manifests is not empty

    /etc/kubernetes/pki is not empty

    /var/lib/kubelet is not empty

    /etc/kubernetes/admin.conf already exists

    /etc/kubernetes/kubelet.conf already exists

[preflight] If you know what you are doing, you can skip pre-flight checks with `--skip-preflight-checks`



kubeadm会自动检查当前环境是否有上次命令执行的“残留”。如果有，必须清理后再行执行init。我们可以通过”kubeadm reset”来清理环境，以备重来。



# kubeadm reset

[preflight] Running pre-flight checks

[reset] Draining node: "iz25beglnhtz"

[reset] Removing node: "iz25beglnhtz"

[reset] Stopping the kubelet service

[reset] Unmounting mounted directories in "/var/lib/kubelet"

[reset] Removing kubernetes-managed containers

[reset] Deleting contents of stateful directories: [/var/lib/kubelet /etc/cni/net.d /var/lib/etcd]

[reset] Deleting contents of config directories: [/etc/kubernetes/manifests /etc/kubernetes/pki]

[reset] Deleting files: [/etc/kubernetes/admin.conf /etc/kubernetes/kubelet.conf]