Linux 命令expect使用详解

yum install expect  -y

#!/usr/bin/expect
spawn ssh root@192.168.2.161 df -h
expect "*password:"
send "winner@001\n"
expect eof

#! /bin/bash
#
# Author: kangll
# CreateTime: 2023-11-10
# Desc: 基础环境配置,包括服务器设置,JDK,免密,kerberos配置
# 可扩展到批量操作 
#
#set -x
BASEDIR=$(cd "$(dirname "$0")"; pwd)
# 加载配置
source  $BASEDIR/config/global.sh
ssh_networkname=(windp-aio)
ssh_passwd=winner@#2023
########################
# 生成本地ssh公钥
########################
create_ssh_pub(){
	echo "生成本地ssh公钥"
	/usr/bin/expect << eof
	# 设置捕获字符串后，期待回复的超时时间
	set timeout 30
	# 执行命令开启一个新的进程
	spawn ssh-keygen -t rsa -b 1024
	## 开始进连续捕获
	expect	{
		".ssh/id_rsa)"      { send "\n";  exp_continue }
		"Overwrite (y/n)?"  { send "y\n"; exp_continue }
		"no passphrase):"   { send "\n";  exp_continue }
		"passphrase again:" { send "\n";  exp_continue }
	}
eof
}
########################
# 定义复制ssh公钥方法
########################
copy_ssh(){
  if [ ! -f /root/.ssh/id_rsa.pub ];then
       create_ssh_pub
  fi
	echo "复制公钥到对应的主机上"
	/usr/bin/expect << eof
	# 设置捕获字符串后，期待回复的超时时间
	set timeout 30
	# 命令执行
	spawn ssh-copy-id -i /root/.ssh/id_rsa.pub $1@$2
	## 开始进连续捕获
	expect	{
		"connecting (yes/no)?" { send "yes\n";  exp_continue }
		"s password:"          { send "${ssh_passwd}\n"; exp_continue }
	}
eof
}
########################
# 配置免密
########################
config_ssh() {
    # 主机遍历
	for name in ${ssh_networkname[*]};do
		timeout 5 ssh root@${name} "echo ${name}: 'This is success!'"
		if [[ $? -ne 0 ]];then
			echo "复制文件到: ${name}"
			copy_ssh root ${name} > /dev/null
		fi
	done
        echo "********** ssh installation completed **********"
}
# 配置root用户免密 
config_ssh

#! /bin/bash
#
# Author: kangll
# CreateTime: 2023-11-10
# Desc: 基础环境配置,包括服务器设置,JDK,免密,kerberos配置
# 可扩展到批量操作 
#
# public 主机名和root密码 
ip=$(ip addr show | grep -E 'inet [0-9]' | awk '{print $2}' | awk -F '/' '{print $1}' | sed -n '$p')
ssh_hosts=${ip}
ssh_networkname=(windp-aio)
# global.sh 配置文件中获取
ssh_passwd=$root_passwd
ssh_passwd=winner@#2023
kerberos_user=winner_spark
##################################
# 配置kerberos用户: winner_spark 
# 生成keytab 文件
##################################
config_kerberos_user() {
        echo "******** 创建winner_spark用户实例 ********"
        /usr/bin/expect << eof
        # 设置捕获字符串后，期待回复的超时时间
        set timeout 30
        # 登录
        spawn kadmin.local 
        ## 开始进连续捕获，添加用户
        expect  {
                "kadmin.local:"    { send "addprinc ${kerberos_user}\n"; exp_continue }
                "Enter password for principal"    { send "${ssh_passwd}\n"; exp_continue }
                "Re-enter password for principal" { send "${ssh_passwd}\n"; }
        }
       expect "kadmin.local:"    { send "quit\r";  }
eof
       echo "******** winner_spark用户生成keytab文件 ********"
        /usr/bin/expect << eof
        # 设置捕获字符串后，期待回复的超时时间
        set timeout 30
        spawn kadmin.local 
        ## 开始进连续捕获，生成keytab file
        expect  {
                "kadmin.local:" { send "xst -k /etc/security/keytabs/${kerberos_user}.keytab ${kerberos_user}@WINNER.COM\n";  }
        }
       expect "kadmin.local:"    { send "quit\r";  }
eof
       # modify keytab file privilege    
       chown ${kerberos_user}:hadoop /etc/security/keytabs/${kerberos_user}.keytab
       echo "********** kerberos user winner_spark add completed **********"
}
# 配置kerberos,并启动
#config_krb5
# 配置kerberos用户: winner_spark, 生成keytab 文件
config_kerberos_user