node "XXX" not found

（1）使用kubectl

kubectl get node

The connection to the server 192.168.127.128:6443 was refused - did you specify the right host or port?

（2）查看kubelet日志

journalctl -xeu kubelet

5月 30 17:42:58 master.com kubelet[1049]: E0530 17:42:58.314060 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:58 master.com kubelet[1049]: E0530 17:42:58.414432 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:58 master.com kubelet[1049]: E0530 17:42:58.514811 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:58 master.com kubelet[1049]: E0530 17:42:58.615160 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:58 master.com kubelet[1049]: E0530 17:42:58.715273 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:58 master.com kubelet[1049]: E0530 17:42:58.815516 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:58 master.com kubelet[1049]: E0530 17:42:58.915924 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:59 master.com kubelet[1049]: E0530 17:42:59.000379 ? ?1049 event.go:273] Unable to write event: 'Post "https://192.168.127.128:6443/api/v1/namespaces/default/events">
5月 30 17:42:59 master.com kubelet[1049]: E0530 17:42:59.016347 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:59 master.com kubelet[1049]: E0530 17:42:59.116651 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:59 master.com kubelet[1049]: E0530 17:42:59.217157 ? ?1049 kubelet.go:2183] node "master.com" not found
5月 30 17:42:59 master.com kubelet[1049]: E0530 17:42:59.317429 ? ?1049 kubelet.go:2183] node "master.com" not found

（3）?說明master節點無法找到 master.com，查看kubelet配置的ip

cat /etc/kubernetes/kubelet.conf

（4）查看宿主機ip

ifconfig

（5）兩者一致，說明ip是正確的，這說明宿主機的/ets/hosts 配置有問題。如果ip不一致，則需要修改kubelet、kubeadm、api-server對應的ip

cat /etc/hosts

修改為 master.com

vim /etc/hosts

（6）檢測kubectl是否可以連接api-server

kubectl get node

NAME ? ? ? ? STATUS ? ROLES ? ?AGE ? VERSION
master.com ? Ready ? ?master ? 37h ? v1.19.4
work1 ? ? ? ?Ready ? ?<none> ? 65m ? v1.19.4
work2 ? ? ? ?Ready ? ?<none> ? 64m ? v1.19.4?