自动ssh免密配置脚本

因为调用ssh需要免密，使用脚本加配置文件自动批量免密。脚本如下

hostip=$1
name=$2
PASSWORD=$3
需要脚本添加上面三个参数或者通过循环一个host文件实现批量即可。

#!/bin/bash
#yum安装expect
#yum -y install expect
#PWD_1是登陆密码，可以自己设定
#PASSWORD=123456
#hosts="master slave1 slave2"
#
key_generate() {
    expect -c "set timeout -1;
        spawn ssh-keygen -t rsa;
        expect {
            {Enter file in which to save the key*} {send -- 
;exp_continue}
            {Enter passphrase*} {send -- 
;exp_continue}
            {Enter same passphrase again:} {send -- 
;exp_continue}
            {Overwrite (y/n)*} {send -- n
;exp_continue}
            eof             {exit 0;}
    };"
}
auto_ssh_copy_id () {
    expect -c "set timeout -1;
        spawn ssh-copy-id -i $HOME/.ssh/id_rsa.pub $1@$2;
            expect {
                {Are you sure you want to continue connecting *} {send -- yes
;exp_continue;}
                {*password:} {send -- $3
;exp_continue;}
                eof {exit 0;}
            };"
}

check_cmd () {
    if [[ $? == 0 ]];then
        echo "$1 SUCCESS"
    else
        echo "$1 ERROR"
        exit
    fi
}

chmod +x ssh_init.exp 
if [[ ! -e $HOME/.ssh/id_rsa.pub ]]; then
  key_generate && check_cmd "ssh key creat"
fi
hostip=$1
name=$2
PASSWORD=$3
auto_ssh_copy_id $name $hostip  $PASSWORD
./ssh_init.exp $name $hostip  $PASSWORD
check_cmd "ssh scripts run cmd"

做一个秘钥检测，检测是否成功。

ssh_init.exp 内容如下

#!/usr/bin/expect -f
 
set timeout 2
 
set name [lindex $argv 0]
set node [lindex $argv 1]
set pawd [lindex $argv 2]
 
spawn ssh ${name}@${node}
expect {
    "*yes/no*" {send "yes
";exp_continue}
    "*password:" {send "$pawd
"}
}
 
#expect "*${name}@${node}*"
#send "ssh-keygen -t rsa -P ''
"
#expect "*ssh/id_rsa):"
#send "
"
#expect {
#    "Overwrite (y/n)?" {send "y
";exp_continue}
#    "*${name}@${node}*" {send "exit
"}
#}
expect eof
exit