20.27 分发系统介绍
应用场景
当业务越做越大，服务器需求越来越多，几台服务器的话还好一点；当十几、几十台的时候，工作量就非常大！并且不规范，需要一个模板机分发到各个机器上去。
可以用开源的软件，expect脚本语言，进行实现分发系统的功能。
20.28 expect脚本远程登录
- yum install -y expect
- 自动远程登录，并执行命令
#!/usr/bin/expect
set host "192.168.21.130"
set passwd "rootroot"
spawn ssh [email protected]$host
expect {
"yes/no" {send "yes\r"; exp_continue}
"assword:" {send "$passwd\r"}
}
interact #表示停留在机器上
#如果需要退出 可以expect eof
执行操作
[[email protected] sbin]# vim 1.expect
#清空远程登录的记录
[[email protected] sbin]# vi /root/.ssh/known_hosts
#增加执行权限
[[email protected] sbin]# chmod a+x 1.expect
#执行
[[email protected] sbin]# ./1.expect
spawn ssh [email protected]
The authenticity of host ‘192.168.21.130 (192.168.21.130)‘ can‘t be established.
ECDSA key fingerprint is SHA256:e6Fx3oJ8GcMbFnmTV7JIcvZ3sG6W6yrfvdKccXk+c7c.
ECDSA key fingerprint is MD5:15:57:6c:19:21:a2:e4:3e:df:19:27:13:c2:2e:8e:ba.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘192.168.21.130‘ (ECDSA) to the list of known hosts.
[email protected]‘s password:
Last login: Wed Feb 28 08:57:58 2018 from 192.168.21.1
20.29 expect脚本远程执行命令
- 自动远程登录后，执行命令并退出
#脚本代码
#!/usr/bin/expect
set user "root"
set passwd "rootroot"
spawn ssh [email protected]
expect {
"yes/no" { send "yes\r"; exp_continue}
"password:" { send "$passwd\r" }
}
expect "]*"
send "touch /tmp/12.txt\r"
expect "]*"
send "echo 1212 > /tmp/12.txt\r"
expect "]*"
send "exit\r"
执行
[[email protected] sbin]# chmod a+x 2.expect
[[email protected] sbin]# ./2.expect
spawn ssh [email protected]
[email protected]‘s password:
Last login: Wed Feb 28 09:30:05 2018 from 192.168.21.132
[[email protected] ~]# touch /tmp/12.txt
[[email protected] ~]# echo 1212 > /tmp/12.txt
[[email protected] ~]# [[email protected] sbin]#
#查看远程端机上结果
[[email protected] sbin]# ./1.expect
spawn ssh [email protected]
[email protected]‘s password:
Last login: Wed Feb 28 09:36:13 2018 from 192.168.21.132
[[email protected] ~]# ls /tmp/12.txt
/tmp/12.txt
[[email protected] ~]# cat /tmp/12.txt
1212
20.30 expect脚本传递参数
- 传递参数
[[email protected] sbin]# vim 3.expect
#!/usr/bin/expect
set user [lindex $argv 0]
set host [lindex $argv 1]
set passwd "rootroot"
set cm [lindex $argv 2]
spawn ssh [email protected]$host
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect "]*"
send "$cm\r"
expect "]*"
send "exit\r"
执行
[[email protected] sbin]# chmod a+x 3.expect
[[email protected] sbin]# ./3.expect root 192.168.21.130 ls
spawn ssh [email protected]
[email protected]‘s password:
Last login: Wed Feb 28 09:39:16 2018 from 192.168.21.132
[[email protected] ~]# ls
anaconda-ks.cfg shell
[[email protected] ~]# [[email protected] sbin]#
[[email protected] sbin]# ./3.expect root 192.168.21.130 "ls;w;vmstat 1"
#当有多个命令 需要用双引号 作为一个参数传进去
spawn ssh [email protected]
[email protected]‘s password:
Last login: Wed Feb 28 09:46:40 2018 from 192.168.21.132
[[email protected] ~]# ls;w;vmstat 1
anaconda-ks.cfg shell
09:49:34 up 1:00, 2 users, load average: 0.00, 0.01, 0.05
USER TTY FROM [email protected] IDLE JCPU PCPU WHAT
root pts/0 192.168.21.1 08:57 12:46 0.03s 0.03s -bash
root pts/1 192.168.21.132 09:49 0.00s 0.00s 0.00s w
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
3 0 0 206004 2108 197024 0 0 46 11 93 134 0 0 99 1 0
0 0 0 206020 2108 197040 0 0 0 0 74 105 0 0 100 0 0
0 0 0 206020 2108 197040 0 0 0 0 76 100 0 0 100 0 0
0 0 0 206020 2108 197040 0 0 0 9 87 126 0 0 100 0 0
0 0 0 206020 2108 197040 0 0 0 0 75 101 0 0 100 0 0
0 0 0 206020 2108 197040 0 0 0 98 82 115 0 1 99 0 0
0 0 0 206020 2108 197040 0 0 0 5 89 121 0 0 100 0 0
0 0 0 206020 2108 197040 0 0 0 0 75 108 0 0 100 0 0
0 0 0 206012 2108 197048 0 0 0 0 92 119 1 1 98 0 0
0 0 0 206012 2108 197048 0 0 0 0 88 118 0 0 100 0 0
#expect会有超时时间，大概10s左右
原文地址：http://blog.51cto.com/3622288/2073780
时间： 2024-08-10 17:17:47