Kubernetes 安装中的预检错误

Question

我指的是以下链接在 Ubuntu 18.04 上安装 Kubernetes 的安装链接。我在输入命令时收到以下错误：

sudo kubeadm join 192.168.0.114:6443 --token qgce4f.tgzda1zemqnro1em --discovery-token-ca-cert-hash sha256:6ebc15a5a9818481f8a98af01a7a367ba93b2180babb954940edd8178548773a ignore-preflight-errors=All

W0303 18:33:39.565868    7098 join.go:185] [join] WARNING: More than one API server endpoint supplied on command line [192.168.0.114:6443 ignore-preflight-errors=All]. Using the first one.
[preflight] Running pre-flight checks
    [WARNING SystemVerification]: this Docker version is not on the list of validated versions: 18.09.3. Latest validated version: 18.06
[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=...`

有人可以告诉我如何解决这个问题吗？谢谢 ！

Answer 1

考虑使用此处kubeadm reset描述的命令：

The "reset" command executes the following phases:

preflight              Run reset pre-flight checks
update-cluster-status  Remove this node from the ClusterStatus object.
remove-etcd-member     Remove a local etcd member.
cleanup-node           Run cleanup node.

该命令的第四阶段应该修复您提到的 4 个错误：

A ) 它将停止 kubelet 服务 - 因此端口10250将被释放。

B ) 它将删除以下目录的内容：

    /etc/kubernetes/manifests 
    /etc/kubernetes/pki

C ) 它将删除以下文件：

    /etc/kubernetes/admin.conf 
    /etc/kubernetes/kubelet.conf 
    /etc/kubernetes/bootstrap-kubelet.conf 
    /etc/kubernetes/controller-manager.conf 
    /etc/kubernetes/scheduler.conf

(*) 确保kubeadm join以 5 及以上的详细级别运行命令
（通过附加--v=5标志）。