kubeadm join token 失效

新增node节点，需要拥有到token

kubeadm token --help
Usage:
  kubeadm token [flags]
  kubeadm token [command]

Available Commands:
  create      Create bootstrap tokens on the server   //new token
  delete      Delete bootstrap tokens on the server   //delete token 
  generate    Generate and print a bootstrap token, but do not create it on the server
  list        List bootstrap tokens on the server

[root@c-3-104 ~]# kubeadm token list    //default 24h joion token expire
TOKEN                     TTL         EXPIRES                     USAGES                   DESCRIPTION                              
                  EXTRA GROUPS78va9y.lbfgkkpjl9cwe5cs   15h         2020-05-28T13:16:33+08:00   authentication,signing   The default bootstrap token generated by 
'kubeadm init'.   system:bootstrappers:kubeadm:default-node-token[root@c-3-104 ~]# 

//kubeadm token 帮助查看
kubeadm token -h 
kubeadm token create -h
kubeadm token create --ttl 0   //不过期join token,一般都是按需创建

[root@c-3-104 ~]# kubeadm token create --ttl 0
W0527 21:21:32.002569   57104 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8
s.io kubeproxy.config.k8s.io]f94qb7.3v2lfal4vpu2edxc
[root@c-3-104 ~]# 
[root@c-3-104 ~]# 
[root@c-3-104 ~]# kubeadm token list
TOKEN                     TTL         EXPIRES                     USAGES                   DESCRIPTION                              
                  EXTRA GROUPS78va9y.lbfgkkpjl9cwe5cs   15h         2020-05-28T13:16:33+08:00   authentication,signing   The default bootstrap token generated by 
'kubeadm init'.   system:bootstrappers:kubeadm:default-node-tokenf94qb7.3v2lfal4vpu2edxc   <forever>   <never>   authentication,signing   <none>                                                     
system:bootstrappers:kubeadm:default-node-token[root@c-3-104 ~]# 

[root@c-3-104 ~]# kubeadm token create --print-join-command   //新创建一个join token并打印出加入命令
W0527 21:24:10.111159   59181 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8
s.io kubeproxy.config.k8s.io]kubeadm join 192.168.3.104:6443 --token hurkrx.hi0fx7bp728smzvb     --discovery-token-ca-cert-hash sha256:d2de3ae7c47a18ceca31deebcf
1b0e5441cc6a7963e272dd381a8f600ef63820 [root@c-3-104 ~]# 
[root@c-3-104 ~]# 
[root@c-3-104 ~]# kubeadm token list
TOKEN                     TTL         EXPIRES                     USAGES                   DESCRIPTION                              
                  EXTRA GROUPS78va9y.lbfgkkpjl9cwe5cs   15h         2020-05-28T13:16:33+08:00   authentication,signing   The default bootstrap token generated by 
'kubeadm init'.   system:bootstrappers:kubeadm:default-node-tokenf94qb7.3v2lfal4vpu2edxc   <forever>   <never>   authentication,signing   <none>                                                     
system:bootstrappers:kubeadm:default-node-tokenfkpqoi.gbn6tfnrb1928z11   23h         2020-05-28T21:24:05+08:00   authentication,signing   <none>                                   
                  system:bootstrappers:kubeadm:default-node-tokenhurkrx.hi0fx7bp728smzvb   23h         2020-05-28T21:24:10+08:00   authentication,signing   <none>                                   
                  system:bootstrappers:kubeadm:default-node-token[root@c-3-104 ~]# 

reference

link