在CentOS启动时自动加载内核模块overlayfs操作
<p>在CentOS中自动加载内核模块，可以在/etc/sysconfig/modules/目录中增加一个脚本，在此脚本中加载所需的模块。</p>
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下面是我所用的一个名为overlayfs.modules的脚本，用来在我的CentOS 7.X中自动加载overlayfs模块:</p>
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<code class="bash preprocessor bold">#! /bin/sh</code>
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<code class="bash plain">/sbin/modinfo</code> <code class="bash plain">-F filename overlayfs> </code><code class="bash plain">/dev/null</code> <code class="bash plain">2>&1</code>
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<code class="bash keyword">if</code> <code class="bash plain">[ $? -</code><code class="bash keyword">eq</code> <code class="bash plain">0 ]; </code><code class="bash keyword">then</code>
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<code class="bash spaces"> </code><code class="bash plain">/sbin/modprobe</code> <code class="bash plain">overlayfs</code>
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<code class="bash keyword">fi</code>
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脚本首先检查overlayfs模块文件是否存在，如果存在，则调用/sbin/modprobe命令加载此模块。</p>
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把这个文件放在/etc/sysconfig/modules/目录中，并为其增加可执行权限。这样，下次重启系统时，模块就会被自动加载。</p>
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<span><strong>补充知识：</strong></span><strong>Centos7 开机自动加载 模块 ko</strong></p>
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假设现在有一个内核模块文件名为 c1004.ko</p>
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1.首选复制编译完成的模块到内核设备目录</p>
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sudo cp c1004.ko /lib/modules/$(uname -r)/kernel/drivers/</p>
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2.创建模块启动文件</p>
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<code class="bash functions">sudo</code> <code class="bash functions">cat</code> <code class="bash plain">> </code><code class="bash plain">/etc/modules-load</code><code class="bash plain">.d</code><code class="bash plain">/c1004</code><code class="bash plain">.conf <<EOF</code>
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<code class="bash comments"># Load c1004.ko at boot</code>
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<code class="bash plain">c1004</code>
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<code class="bash plain">EOF</code>
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3.更新模块，然后重启</p>
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sudo depmod</p>
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reboot</p>
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4.重启后检查模块是否已经正常安装</p>
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<code class="bash plain">lsmod |</code><code class="bash functions">grep</code> <code class="bash plain">c1004</code>
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<code class="bash comments"># 输出类似下面内容说明自启动 OK</code>
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<code class="bash plain">c1004 30081 0</code>
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如果运行 insmod c1004.ko 报错则需要重新编译驱动文件。</p>
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卸载驱动 rmmod c1004</p>
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以上这篇在CentOS启动时自动加载内核模块overlayfs操作就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。</p>
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原文链接：https://blog.csdn.net/mesos/article/details/51777710</p>
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