原 [ERROR FileAvailable--etc-kubernetes-kubelet.conf]: /etc/kubernetes/kubelet.conf already exists

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一：k8s将node节点加入到master报错信息如下

error execution phase preflight: [preflight] Some fatal errors occurred:
        [ERROR FileAvailable--etc-kubernetes-kubelet.conf]: /etc/kubernetes/kubelet.conf already exists
        [ERROR Port-10250]: Port 10250 is in use
        [ERROR FileAvailable--etc-kubernetes-pki-ca.crt]: /etc/kubernetes/pki/ca.crt already exists
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher

二：解决方法

2.1）删除k8s配置文件

rm -f /etc/kubernetes/kubelet.conf

2.2） 删除K8S证书

rm -f /etc/kubernetes/pki/ca.crt

2.3）然后重新加入master节点

kubeadm join 192.168.78.128:6443 --token 20qv0a.be2y1ggnefvr282g \
        --discovery-token-ca-cert-hash sha256:900e24e31fd7002e9571086263e23b920ec804949d6cd6bffc56e91f93c694c1