配置 /etc/hosts

在控制节点执行 ssh-keygen -t rsa
之后 连按三个回车 分发ssh-copy-id -p 22 -i /root/.ssh/id_rsa.pub hdss7-11
ssh-copy-id -p 22 -i /root/.ssh/id_rsa.pub hdss7-12
ssh-copy-id -p 22 -i /root/.ssh/id_rsa.pub hdss7-21
ssh-copy-id -p 22 -i /root/.ssh/id_rsa.pub hdss7-12 |