(CentOS6)自动推送密钥实现集群免密登录

1.准备

新建一个ip.txt文件，按照四列写好集群的IP地址，主机名，账号，密码：

ip	hostname	user	password
192.168.1.100	test01	root	passwd
192.168.1.100	test02	root	passwd

2.代码

#!/bin/bash
#install expect module
rpm -q expect &>/dev/null
if [ $? -ne 0 ];then
        yum -y install expect
fi
#generate key
if [ ! -f ~/.ssh/id_rsa ];then
        ssh-keygen -P "" -f ~/.ssh/id_rsa
fi
while read line
do
        {
        ip=`echo $line |awk '{print $1}'`
        user=`echo $line |awk '{print $3}'`
        passwd=`echo $line |awk '{print $4}'`
        /usr/bin/expect <<-EOF
        set timeout 10
        spawn ssh-copy-id $user@$ip
        expect {
                "connecting (yes/no)" { send "yes\r"; exp_continue }
                "password:" { send "$passwd\r" }
        }
        expect eof
        EOF
        } &
done < ip.txt
wait
echo "all finish..."