kubeadm join时出现错误：[ERROR Port-10250]: Port 10250 is in use [ERROR FileAvailable--etc-kubernetes-pki

kubeadm join时出现错误：[ERROR Port-10250]: Port 10250 is in use；[ERROR FileAvailable--etc-kubernetes-pki-ca.crt]: /etc/kubernetes/pki/ca.crt already exists

初次使用kubeadm构建k8s集群，所以对子节点加入管理节点的过程认识不足，导致我先对子节点进行了kubeadm init之后，才准备进行kubeadm join操作。结果出现了如下错误：

[root@k8s-node02 ostrich5yw]# kubeadm join 192.168.139.129:6443 --token abcdef.0123456789abcdef \
>     --discovery-token-ca-cert-hash sha256:3ac4ae8b5b3b08f2b8cd8a85be7b37bc5855e749ec9126e3d87bebfb2235af9b
[preflight] Running pre-flight checks[WARNING SystemVerification]: this Docker version is not on the list of validated versions: 20.10.6. Latest validated version: 18.09
error execution phase preflight: [preflight] Some fatal errors occurred:[ERROR DirAvailable--etc-kubernetes-manifests]: /etc/kubernetes/manifests is not empty[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=...`

问题原因：只有父节点需要运行kubeadm init --config=kubeadm-config.yaml --upload-certs | tee kubeadm-init.log进行初始化；对于子节点来说，无需进行kubeadm init进行初始化，直接运行kubeadm join加入父节点即可。

解决方法：运行kubeadm reset重置子节点，之后直接对子节点使用kubeadm join 192.168.139.129:6443 --token abcdef.0123456789abcdef --discovery-token-ca-cert-hash sha256:3ac4ae8b5b3b08f2b8cd8a85be7b37bc5855e749ec9126e3d87bebfb2235af9b将其加入对应的父节点中。

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kubeadm join时出现错误：[ERROR Port-10250]: Port 10250 is in use [ERROR FileAvailable--etc-kubernetes-pki

kubeadm join时出现错误：[ERROR Port-10250]: Port 10250 is in use；[ERROR FileAvailable--etc-kubernetes-pki-ca.crt]: /etc/kubernetes/pki/ca.crt already exists

kubeadm join时出现错误：[ERROR Port-10250]: Port 10250 is in use [ERROR FileAvailable--etc-kubernetes-pki相关推荐

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