CentOS使用expect批量远程执行脚本和命令
<p>我们有时可能会批量去操作服务器，比如批量在服务器上上传某个文件，安装软件，执行某个命令和脚本，重启服务，重启服务器等，如果人工去一台台操作的话会特别繁琐，并浪费人力。</p>
<p>
这时我们可以使用expect，向目标服务器上发送指令去实现批量操作。</p>
<p>
下面的例子将在centos上将一个文件，批量拷贝到其他服务商上，并执行相应的命令</p>
<p>
<strong>1. 在centos上安装expect</strong></p>
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yum install expect</p>
<p>
<strong>2. 编写expect脚本 copyfilebatch.sh</strong></p>
<p>
下面的脚本将向内网IP为 192.168.0.102 至 192.168.0.112 的服务器分别拷贝一个rc.local文件，拷贝成功后,执行chmod命令，分别重启服务器</p>
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<code class="bash preprocessor bold">#!/usr/bin/expect -f</code>
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<code class="bash functions">set</code> <code class="bash plain">password rootpassword</code>
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<code class="bash keyword">for</code> <code class="bash plain">{</code><code class="bash functions">set</code> <code class="bash plain">i 102} {$i <= 112} {incr i} {</code>
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<code class="bash spaces"> </code><code class="bash functions">set</code> <code class="bash plain">ip </code><code class="bash string">"192.168.0.$i"</code>
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<code class="bash spaces"> </code><code class="bash plain">puts </code><code class="bash string">"$ip"</code>
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<code class="bash spaces"> </code><code class="bash plain">spawn </code><code class="bash functions">ssh</code> <code class="bash plain">-o StrictHostKeyChecking=no $ip</code>
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<code class="bash spaces"> </code><code class="bash functions">set</code> <code class="bash plain">timeout 3</code>
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<code class="bash spaces"> </code><code class="bash plain">expect </code><code class="bash string">"root@$ip's password:"</code>
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<code class="bash spaces"> </code><code class="bash functions">set</code> <code class="bash plain">timeout 3</code>
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<code class="bash spaces"> </code><code class="bash plain">send </code><code class="bash string">"$password\r"</code>
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<code class="bash spaces"> </code><code class="bash functions">set</code> <code class="bash plain">timeout 3</code>
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<code class="bash spaces"> </code><code class="bash plain">send </code><code class="bash string">"exit\r"</code>
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<code class="bash spaces"> </code><code class="bash plain">spawn </code><code class="bash functions">scp</code> <code class="bash plain">/home/install/rc</code><code class="bash plain">.</code><code class="bash functions">local</code> <code class="bash plain">root@$ip:</code><code class="bash plain">/etc/rc</code><code class="bash plain">.d</code><code class="bash plain">/rc</code><code class="bash plain">.</code><code class="bash functions">local</code>
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<code class="bash spaces"> </code><code class="bash functions">set</code> <code class="bash plain">timeout 3</code>
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<code class="bash spaces"> </code><code class="bash plain">expect </code><code class="bash string">"root@$ip's password:"</code>
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<code class="bash spaces"> </code><code class="bash functions">set</code> <code class="bash plain">timeout 3</code>
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<code class="bash spaces"> </code><code class="bash plain">send </code><code class="bash string">"$password\r"</code>
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<code class="bash spaces"> </code><code class="bash functions">set</code> <code class="bash plain">timeout 3</code>
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<code class="bash spaces"> </code><code class="bash plain">send </code><code class="bash string">"exit\r"</code>
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<code class="bash spaces"> </code><code class="bash plain">spawn </code><code class="bash functions">ssh</code> <code class="bash plain">root@$ip</code>
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<code class="bash spaces"> </code><code class="bash plain">expect {</code>
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<code class="bash spaces"> </code><code class="bash string">"*yes/no"</code> <code class="bash plain">{ send </code><code class="bash string">"yes\r"</code><code class="bash plain">; exp_continue}</code>
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<code class="bash spaces"> </code><code class="bash string">"*password:"</code> <code class="bash plain">{ send </code><code class="bash string">"$password\r"</code> <code class="bash plain">}</code>
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<code class="bash spaces"> </code><code class="bash plain">}</code>
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<code class="bash spaces"> </code><code class="bash plain">expect </code><code class="bash string">"#*"</code>
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<code class="bash spaces"> </code><code class="bash comments">#要执行的命令</code>
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<code class="bash spaces"> </code><code class="bash plain">send </code><code class="bash string">"chmod +x /etc/rc.d/rc.local\r"</code>
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<code class="bash spaces"> </code><code class="bash plain">send </code><code class="bash string">"reboot\r"</code>
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<code class="bash spaces"> </code><code class="bash plain">send </code><code class="bash string">"exit\r"</code>
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<code class="bash spaces"> </code><code class="bash plain">expect eof</code>
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<code class="bash plain">}</code>
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<p>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。</p>
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原文链接：https://www.cnblogs.com/DevinZhang1990/p/12692449.html</p>
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