配置主机互信:

    $ ssh-keygen -t rsa -f ~/.ssh/id_rsa -N ''
    
    将节点主机信息添加到本地，防止提醒
    for host in 192.168.200.{27..33};do
     ssh-keyscan $host >>~/.ssh/known_hosts 2>/dev/null
    done

    # sshpass -p选项指定的是密码
    for host in 192.168.200.{27..33};do
     sshpass -p'123456' ssh-copy-id root@$host &>/dev/null
    done