master：
[root@k8s-master1 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 127.0.0.1 k8s-master1 master1 10.10.22.20 k8s-master1 master1 10.10.22.121 k8s-node1 node1
node：
[root@k8s-node1 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 127.0.0.1 k8s-node1 node1 10.10.22.20 k8s-master1 master1 10.10.22.121 k8s-node1 node1
