执行kubeadm join 出现报错
[root@weifeng02 shell]# kubeadm join --token 9e6996.ef3202709275b177 192.168.18.222:6443 --discovery-token-ca-cert-hash sha256:9a5cb02381282c29bfc44f980624473a68c07e3e5388eb14fb7439b8e5568703
[discovery] Failed to request cluster info, will try again: [Get https://192.168.18.222:6443/api/v1/namespaces/kube-public/configmaps/cluster-info: x509: certificate has expired or is not yet valid]
[discovery] Failed to request cluster info, will try again: [Get https://192.168.18.222:6443/api/v1/namespaces/kube-public/configmaps/cluster-info: x509: certificate has expired or is not yet valid]
[discovery] Failed to request cluster info, will try again: [Get https://192.168.18.222:6443/api/v1/namespaces/kube-public/configmaps/cluster-info: x509: certificate has expired or is not yet valid]
这种错误，一般都是本地系统时间错误导致报错证书过期，所以先查看本地系统时间
# date "+%Y-%m-%d" #系统时间2月15日，而正确时间应该是4月17日，所以很大可能就是该原因
2015-02-15
解决：
# ntpdate cn.pool.ntp.org #同步一下时间
17 Apr 17:40:45 ntpdate[32206]: step time server 202.112.29.82 offset 5262859.193967 sec
# date "+%Y-%m-%d" #时间同步成功
2015-04-17
再执行 kubeadm join 成功
[root@weifeng02 shell]# kubeadm join --token 9e6996.ef3202709275b177 192.168.18.222:6443 --discovery-token-ca-cert-hash sha256:9a5cb02381282c29bfc44f980624473a68c07e3e5388eb14fb7439b8e5568703
[discovery] Successfully established connection with API Server "192.168.18.222:6443"
This node has joined the cluster:
* Certificate signing request was sent to master and a response
was received.
* The Kubelet was informed of the new secure connection details.
Run 'kubectl get nodes' on the master to see this node join the cluster.