#!/bin/bash

user=`whoami`
passwd=000000

for((host=101; host<=105; host++));do
    sshpass -p $passwd ssh -q -o StrictHostKeyChecking=no ${user}@hadoop${host} "rm -rf ~/.ssh/*"
done

:<<!
for((host=102; host<=104; host++));do
    sshpass -p $passwd ssh -q -o StrictHostKeyChecking=no ${user}@hadoop${host} "sudo yum install -y sshpass expect -y"
done
!

# sudo yum install -y sshpass expect
for((host=101; host<=105; host++));do
    sshpass -p $passwd ssh -q -o StrictHostKeyChecking=no ${user}@hadoop${host} expect << EOF
    spawn ssh-keygen -t rsa
    expect {
        "Enter file in which to save the key (/root/.ssh/id_rsa):" { send "\r"; exp_continue}
        "Enter file in which to save the key (/home/${user}/.ssh/id_rsa):" { send "\r"; exp_continue}
        "Overwrite (y/n)?" { send "y\r"; exp_continue }
        "Enter passphrase (empty for no passphrase):" { send "\r"; exp_continue}
        "Enter same passphrase again:" { send "\r"}
    }
    expect eof
EOF
done

for((current=101; current<=105; current++));do
    for((host=101; host<=105; host++));do
        sshpass -p $passwd ssh -q -o StrictHostKeyChecking=no ${user}@hadoop${current} "sshpass -p $passwd ssh-copy-id -o StrictHostKeyChecking=no ${user}@hadoop${host}"
    done
done
echo "恭喜, 免密登錄配置完成!"