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ip.txt文件存储的是所有主机的IP，每行一个

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#!/bin/bash
    ps='GMLWHwfO9vfahqbJic'
    key='ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCdSnEVHBG1tOP9XwsZqRddym/5B0Jx5dOPewKmPePlEPWLHuaIeWICoe52X5BmfFh67pYrO4QTLwg3chdkrOZc3RJzqKQdwuVT+yBQGmfm/X4I3pXNs5a1AHItwu0XhzplqbKSOd0ChIQ3UEdsPU2MaxqXFt0TlM4wyMoMXiQC4BTQAnFwk//BURyCroqjHT285mY60LGXj46RcMlXryTTDXlvnZebvWIGjtPVzKPzxMfwfPRuCssU1gPMqWpb0dAMudmmJIt/5uoUDPs0V4WNuDLbugWh1sRlYOx0ncu4NOlRMSAobyQ2qbQiQMS1v2eYYrrBd8DcTRKfRwDUUFHb openstack'
    for ip in `cat /root/ip.txt`; do
    echo 'begin $ip';
    set timeout 5
    expect -c "
      spawn ssh root@$ip
      expect \"(yes/no)?\" {send \"yes\n\";exp_continue}
      expect \"password:\" {send \"$ps\n\"}
      expect \"]#\" {send \"echo $key >> /root/.ssh/authorized_keys\n\"}
      expect \"]#\" {send \"exit\n\"}
      expect eof
    "
    echo 'finish $ip';
    done