Centos安装OpenVSwitch历程
<p>工作需要，要在公司的虚拟机Centos系统上安装部署openvswitch，前前后后忙了两天才安装成功，下面记录一下安装过程和发现的问题及最后的解决方法。</p><p><strong>操作系统：</strong></p>
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<pre># <span style="color: rgba(0, 0, 255, 1)">cat</span> /etc/redhat-<span style="color: rgba(0, 0, 0, 1)">release
CentOS Linux release </span><span style="color: rgba(128, 0, 128, 1)">7.6</span>.<span style="color: rgba(128, 0, 128, 1)">1810</span> (Core) </pre>
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<p><strong>openvswitch版本：</strong></p>
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<pre># ll openvswitch-<span style="color: rgba(128, 0, 128, 1)">2.11</span>.<span style="color: rgba(128, 0, 128, 1)">1</span>.<span style="color: rgba(0, 0, 255, 1)">tar</span><span style="color: rgba(0, 0, 0, 1)">.gz
</span>-rw-r--r--. <span style="color: rgba(128, 0, 128, 1)">1</span> ovswitch ovswitch <span style="color: rgba(128, 0, 128, 1)">7682693</span> Oct <span style="color: rgba(128, 0, 128, 1)">10</span> <span style="color: rgba(128, 0, 128, 1)">06</span>:<span style="color: rgba(128, 0, 128, 1)">58</span> openvswitch-<span style="color: rgba(128, 0, 128, 1)">2.11</span>.<span style="color: rgba(128, 0, 128, 1)">1</span>.<span style="color: rgba(0, 0, 255, 1)">tar</span>.gz</pre>
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<p> </p>
<p>一、 错误的安装方法：</p>
<p>根据以往源码安装方式已经上网搜索的安装方式，</p>
<p>1、 先下载安装包：openvswitch-2.11.1.tar.gz；</p>
<p>2、 解压：tar zxvf openvswitch-2.11.1.tar.gz</p>
<p>3、 执行配置脚本：./configure --<span class="hljs-keyword">with-linux=/lib/modules/`uname -r`<span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-keyword">/build；如果没有配置文件则执行./boot.sh生成；</span></span></span></span></span></p>
<p><span class="hljs-keyword"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-keyword">到这一步报错，发现是因为没有安装内核开发包，于是按照网上方法：</span></span></span></span></span></p>
<p><span class="hljs-keyword"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-keyword">4、 安装内核开发包：yum -y install kernel-devel，安装完成后运行rpm -qa | grep "kernel-devel"发现默认安装的包和系统内核版本不一致；</span></span></span></span></span></p>
<p><span class="hljs-keyword"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-keyword">执行配置文件还是报错，以为是内核安装包版本不一致导致，于是从网上下载了kernel-devel-3.10.0-957.21.3.el7.centos.plus.x86_64.rpm这个包，安装后依然报错：</span></span></span></span></span></p>
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<pre>configure error: linux kernel source in /lib/modules/<span style="color: rgba(128, 0, 128, 1)">3.10</span>.<span style="color: rgba(128, 0, 128, 1)">0</span>-<span style="color: rgba(128, 0, 128, 1)">957.1</span>.<span style="color: rgba(128, 0, 128, 1)">3</span>.el7.x86_64/build is not configured.</pre>
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<p>在这里卡住了很久，不知道解决方法，后来想到去配置文件里面找问题；</p>
<p>5、 进入配置文件：vi configure，<strong>搜索错误信息is not configured</strong></p>
<p>有如下脚本：</p>
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<pre> <span style="color: rgba(0, 0, 255, 1)">if</span> (test ! -e <span style="color: rgba(128, 0, 0, 1)">"</span><span style="color: rgba(128, 0, 0, 1)">$KBUILD</span><span style="color: rgba(128, 0, 0, 1)">"</span>/include/linux/version.h &&<span style="color: rgba(0, 0, 0, 1)"> \
test </span>! -e <span style="color: rgba(128, 0, 0, 1)">"</span><span style="color: rgba(128, 0, 0, 1)">$KBUILD</span><span style="color: rgba(128, 0, 0, 1)">"</span>/include/generated/uapi/linux/version.h)||<span style="color: rgba(0, 0, 0, 1)"> \
(test </span>! -e <span style="color: rgba(128, 0, 0, 1)">"</span><span style="color: rgba(128, 0, 0, 1)">$KBUILD</span><span style="color: rgba(128, 0, 0, 1)">"</span>/include/linux/autoconf.h &&<span style="color: rgba(0, 0, 0, 1)"> \
test </span>! -e <span style="color: rgba(128, 0, 0, 1)">"</span><span style="color: rgba(128, 0, 0, 1)">$KBUILD</span><span style="color: rgba(128, 0, 0, 1)">"</span>/include/generated/autoconf.h); <span style="color: rgba(0, 0, 255, 1)">then</span><span style="color: rgba(0, 0, 0, 1)">
as_fn_error $</span>? <span style="color: rgba(128, 0, 0, 1)">"</span><span style="color: rgba(128, 0, 0, 1)">Linux kernel source in $KBUILD is not configured</span><span style="color: rgba(128, 0, 0, 1)">"</span> <span style="color: rgba(128, 0, 0, 1)">"</span><span style="color: rgba(128, 0, 0, 1)">$LINENO</span><span style="color: rgba(128, 0, 0, 1)">"</span> <span style="color: rgba(128, 0, 128, 1)">5</span>
<span style="color: rgba(0, 0, 255, 1)">fi</span></pre>
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<p>想到可能是由于缺少文件导致，遂去目录找相关文件，并把文件按照相关路径拷贝过去；执行配置脚本，配置成功；</p>
<p>6、 编译程序：make；发现有很多错误，基本上都是定义冲突的错误，上网找不到资料，最后根据错误提示，去源码中注释掉一些冲突的定义，再编译还是无法通过；</p>
<p>7、 这边卡住了一段时间，思考是不是系统版本和OpenVSwitch版本不兼容所致，接着就去官网查了一下版本：</p>
<p><img src="https://img2018.cnblogs.com/blog/731444/201910/731444-20191010190700387-1741396777.png"></p>
<p> </p>
<p> 发现版本原来的OpenVSwitch1.3版本对内核3.10不支持，随即换成了最新的版本，再编译依然不通过；接着在官方网站http://docs.openvswitch.org上搜索查找，仍然没找到解决方法；</p>
<p>7、 最后无意中搜索相关的冲突代码，找到一些相关信息：</p>
<p>链接：https://blog.csdn.net/sqzhao/article/details/71077143</p>
<p>大概意思就是Centos系统安装openvswitch会出问题，和其他系统不太一致；</p>
<p> </p>
<p>最后上网搜索了Centos系统安装OpenVSwitch，发现了很多资料，找了一篇教程安装，最后安装成功；</p>
<p> </p>
<p>二、正确的安装方法</p>
<p>1、 安装依赖包：yum -y install openssl-devel wget kernel-devel</p>
<p>2、 安装开发工具：yum groupinstall "Development Tools"</p>
<p>3、 添加用户：adduser ovswitch，切换用户并跳转至用户文件夹：su - ovswitch //此步骤并不是必须，仅仅为为了有一个用户文件夹好用来执行后面的命令，可以是用当前的非root 用户执行下面相关的命令</p>
<p>4、 下载源码：openvswitch-2.11.1.tar.gz</p>
<p>5、 解压：tar xfz openvswitch-2.11.1.tar.gz</p>
<p>6、 创建编译目录：mkdir -p ~/rpmbuild/SOURCES</p>
<p>7、 从spec文件中删除openvswitch-kmod的依赖包，并创建一个新的spec文件：</p>
<p>sed 's/openvswitch-kmod, //g' openvswitch-2.11.1/rhel/openvswitch.spec > openvswitch-2.11.1/rhel/openvswitch_no_kmod.spec</p>
<p>8、 开始编译：rpmbuild -bb --without=check ~/openvswitch-2.11.1/rhel/openvswitch_no_kmod.spec</p>
<p>可能出现以下错误：</p>
<p>error: File /home/ovswitch/rpmbuild/SOURCES/openvswitch-2.11.1.tar.gz: No such file or directory</p>
<p>解决办法：cp openvswitch-2.11.1.tar.gz rpmbuild/SOURCES</p>
<p>（rpmbuild是一个工具，需要自己安装）</p>
<p>9、 退出当前用户使用root： exit</p>
<p>10、 安装编译生成的rpm文件：</p>
<p>yum localinstall /home/ovswitch/rpmbuild/RPMS/x86_64/openvswitch-2.11.1-1.x86_64.rpm</p>
<p>11、 启动服务：systemctl start openvswitch.service</p>
<p>12、 查看服务状态：systemctl -l status openvswitch.service</p>
<p> </p>
<p>可能出现以下错误：</p>
<p> </p>
<p>openvswitch.service - LSB: Open vSwitch switch<br> Loaded: loaded (/etc/rc.d/init.d/openvswitch)<br> Active: activating (start) since 四 2014-12-04 18:35:32 CST; 1min 30s ago<br> Control: 13694 (openvswitch)<br> CGroup: /system.slice/openvswitch.service<br> ├─13694 /bin/sh /etc/rc.d/init.d/openvswitch start<br> ├─13696 /bin/sh /usr/share/openvswitch/scripts/ovs-ctl start --system-id=random<br> ├─13697 tee -a /var/log/openvswitch/ovs-ctl.log<br> ├─13723 ovs-vswitchd unix:/var/run/openvswitch/db.sock -vconsole:emer -vsyslog:err -vfile:info --mlockall --no-chdir --log-file=/var/log/openvswitch/ovs-vswitchd.log --pidfile=/var/run/openvswitch/ovs-vswitchd.pid --detach --monitor<br> ├─13724 ovs-vswitchd unix:/var/run/openvswitch/db.sock -vconsole:emer -vsyslog:err -vfile:info --mlockall --no-chdir --log-file=/var/log/openvswitch/ovs-vswitchd.log --pidfile=/var/run/openvswitch/ovs-vswitchd.pid --detach --monitor<br> └─13725 ovs-vswitchd unix:/var/run/openvswitch/db.sock -vconsole:emer -vsyslog:err -vfile:info --mlockall --no-chdir --log-file=/var/log/openvswitch/ovs-vswitchd.log --pidfile=/var/run/openvswitch/ovs-vswitchd.pid --detach --monitor<br><br><br>12月 04 18:35:33 localhost.localdomain openvswitch: /etc/openvswitch/conf.db does not exist ... (warning).<br>12月 04 18:35:33 localhost.localdomain openvswitch: Creating empty database /etc/openvswitch/conf.db ovsdb-tool: I/O error: /etc/openvswitch/conf.db: failed to lock lockfile (Resource temporarily unavailable)<br>12月 04 18:35:33 localhost.localdomain openvswitch: <br>12月 04 18:35:33 localhost.localdomain openvswitch: Inserting openvswitch module [ OK ]</p>
<p> </p>
<p>解决办法：</p>
<p>yum install policycoreutils-python.x86_64 0:2.2.5-11.el7</p>
<p>mkdir /etc/openvswitch<br>semanage fcontext -a -t openvswitch_rw_t "/etc/openvswitch(/.*)?"<br>restorecon -Rv /etc/openvswitch</p>
<p> </p>
<p>再次使用:</p>
<p>systemctl stop openvswitch.service</p>
<p>systemctl start openvswitch.service</p>
<p> </p>
<p>再次查看服务状态：systemctl -l status openvswitch.service</p>
<p> </p>
<p>openvswitch.service - LSB: Open vSwitch switch<br> Loaded: loaded (/etc/rc.d/init.d/openvswitch)<br> Active: active (running) since 四 2014-12-04 18:38:52 CST; 6s ago<br> Process: 13741 ExecStart=/etc/rc.d/init.d/openvswitch start (code=exited, status=0/SUCCESS)<br> CGroup: /system.slice/openvswitch.service<br> ├─13724 ovs-vswitchd: monitoring pid 13725 (healthy) <br> ├─13725 ovs-vswitchd unix:/var/run/openvswitch/db.sock -vconsole:emer -vsyslog:err -vfile:info --mlockall --no-chdir --log-file=/var/log/openvswitch/ovs-vswitchd.log --pidfile=/var/run/openvswitch/ovs-vswitchd.pid --detach --monitor<br> ├─13764 ovsdb-server: monitoring pid 13765 (healthy) <br> └─13765 ovsdb-server /etc/openvswitch/conf.db -vconsole:emer -vsyslog:err -vfile:info --remote=punix:/var/run/openvswitch/db.sock --private-key=db:Open_vSwitch,SSL,private_key --certificate=db:Open_vSwitch,SSL,certificate --bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert --no-chdir --log-file=/var/log/openvswitch/ovsdb-server.log --pidfile=/var/run/openvswitch/ovsdb-server.pid --detach --monitor<br><br><br>12月 04 18:38:51 localhost.localdomain systemd: Starting LSB: Open vSwitch switch...<br>12月 04 18:38:51 localhost.localdomain openvswitch: /etc/openvswitch/conf.db does not exist ... (warning).<br>12月 04 18:38:51 localhost.localdomain openvswitch: Creating empty database /etc/openvswitch/conf.db [ OK ]<br>12月 04 18:38:52 localhost.localdomain openvswitch: Starting ovsdb-server [ OK ]<br>12月 04 18:38:52 localhost.localdomain openvswitch: Configuring Open vSwitch system IDs [ OK ]<br>12月 04 18:38:52 localhost.localdomain openvswitch: ovs-vswitchd is already running.<br>12月 04 18:38:52 localhost.localdomain openvswitch: Enabling remote OVSDB managers [ OK ]<br>12月 04 18:38:52 localhost.localdomain systemd: Started LSB: Open vSwitch switch.<br>12月 04 18:38:52 localhost.localdomain openvswitch: Starting ovs-vswitchd [ OK ]<br>12月 04 18:38:52 localhost.localdomain openvswitch: Enabling remote OVSDB managers [ OK ]</p>
<p> </p>
<p> </p>
<p>正确方法参考：https://www.cnblogs.com/bethal/p/6043899.html</p><br><br>
来源：https://www.cnblogs.com/slz-coder150315/p/11650019.html
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