kubeadm join --token， Failed to request cluster info

今天想向kubernetes中增加一个节点，利用命令行：

kubeadm join --token c93b06.2cddb224a8931cb3 162.3.160.61:6443

但是加入节点的时候居然报错了，如下：

[kubeadm] WARNING: kubeadm is in beta, please do not use it for production clusters.

[preflight] Running pre-flight checks

[preflight] Starting the kubelet service

[discovery] Trying to connect to API Server "162.3.160.61:6443"

[discovery] Created cluster-info discovery client, requesting info from "https://162.3.160.61:6443"

[discovery] Failed to request cluster info, will try again: [the server has asked for the client to provide credentials (get configmaps cluster-info)]

    [discovery] Failed to request cluster info, will try again: [the server has asked for the client to provide credentials (get configmaps cluster-info)]

[discovery] Failed to request cluster info, will try again: [the server has asked for the client to provide credentials (get configmaps cluster-info)]

[discovery] Failed to request cluster info, will try again: [the server has asked for the client to provide credentials (get configmaps cluster-info)]

[discovery] Failed to request cluster info, will try again: [the server has asked for the client to provide credentials (get configmaps cluster-info)]

[discovery] Failed to request cluster info, will try again: [the server has asked for the client to provide credentials (get configmaps cluster-info)]

[discovery] Failed to request cluster info, will try again: [the server has asked for the client to provide credentials (get configmaps cluster-info)]

获取cluster-info获取不到，为什么呢？

Google了很久也没查到具体的原因，难道token过期了？

kubeadm token list

TOKEN TTL EXPIRES USAGES DESCRIPTION

c93b06.2cddb224a8931cb3 <forever> <never> authentication,signing The default bootstrap token generated by 'kubeadm init'.

Kubeadm token list 可以看到token没有过期。

为什么为什么为什么？灵光一现，我们在kubeadm部署kubernetes, 部署dashborad不能访问的问题博客中，关闭了匿名访问，是不是这个原因呢？赶快把修改的api-server的启动参数在改回去，如下图所示

重启kubelet, service kubelet restart

再次加入节点

[root@node2 ~]# kubeadm join --token c93b06.2cddb224a8931cb3 162.3.160.61:6443

[kubeadm] WARNING: kubeadm is in beta, please do not use it for production clusters.

[preflight] Running pre-flight checks

[preflight] Starting the kubelet service

[discovery] Trying to connect to API Server "162.3.160.61:6443"

[discovery] Created cluster-info discovery client, requesting info from "https://162.3.160.61:6443"

[discovery] Cluster info signature and contents are valid, will use API Server "https://162.3.160.61:6443"

[discovery] Successfully established connection with API Server "162.3.160.61:6443"

[bootstrap] Detected server version: v1.7.6

[bootstrap] The server supports the Certificates API (certificates.k8s.io/v1beta1)

[csr] Created API client to obtain unique certificate for this node, generating keys and certificate signing request

[csr] Received signed certificate from the API server, generating KubeConfig...

[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/kubelet.conf"

Node join complete:

* Certificate signing request sent to master and response

received.

* Kubelet informed of new secure connection details.

Run 'kubectl get nodes' on the master to see this machine join.

Oh, yes, 能够正常加入节点了，自己给自己挖的坑啊。

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