注意：最新LTS为 2.5.1，已成功编译（肖军）
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转：
原文 http://blog.csdn.net/shenshouer/article/details/41728395
一、环境：
宿主机：mac os 10.10
虚拟机：virtualbox 4.3.20
虚拟机操作系统：CentOS7-1406
Openvswitch 2.3.0
二、安装
1、安装依赖包：yum -y install openssl-devel wget kernel-devel
2、安装开发工具：yum groupinstall “Development Tools”
3、添加用户：adduser ovswitch，切换用户并跳转至用户文件夹：su – ovswitch
4、下载源码：wget http://openvswitch.org/releases/openvswitch-2.3.0.tar.gz
5、解压：tar xfz openvswitch-2.3.0.tar.gz
6、创建编译目录：mkdir -p ~/rpmbuild/SOURCES
7、从spec文件中删除openvswitch-kmod的依赖包，并创建一个新的spec文件：
sed ‘s/openvswitch-kmod, //g’ openvswitch-2.3.0/rhel/openvswitch.spec > openvswitch-2.3.0/rhel/openvswitch_no_kmod.spec
8、开始编译：rpmbuild -bb –without check ~/openvswitch-2.3.0/rhel/openvswitch_no_kmod.spec
可能出现以下错误：
error: File /home/ovswitch/rpmbuild/SOURCES/openvswitch-2.3.0.tar.gz: No such file or directory
解决办法：cp openvswitch-2.3.0.tar.gz rpmbuild/SOURCES
9、退出当前用户使用root： exit
10、安装编译生成的rpm文件：
yum localinstall /home/ovswitch/rpmbuild/RPMS/x86_64/openvswitch-2.3.0-1.x86_64.rpm
11、启动服务：systemctl start openvswitch.service
12、查看服务状态：systemctl -l status openvswitch.service
可能出现以下错误：
openvswitch.service – LSB: Open vSwitch switch
Loaded: loaded (/etc/rc.d/init.d/openvswitch)
Active: activating (start) since 四 2014-12-04 18:35:32 CST; 1min 30s ago
Control: 13694 (openvswitch)
CGroup: /system.slice/openvswitch.service
├─13694 /bin/sh /etc/rc.d/init.d/openvswitch start
├─13696 /bin/sh /usr/share/openvswitch/scripts/ovs-ctl start –system-id=random
├─13697 tee -a /var/log/openvswitch/ovs-ctl.log
├─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
├─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
└─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
12月 04 18:35:33 localhost.localdomain openvswitch[13694]: /etc/openvswitch/conf.db does not exist … (warning).
12月 04 18:35:33 localhost.localdomain openvswitch[13694]: Creating empty database /etc/openvswitch/conf.db ovsdb-tool: I/O error: /etc/openvswitch/conf.db: failed to lock lockfile (Resource temporarily unavailable)
12月 04 18:35:33 localhost.localdomain openvswitch[13694]: [FAILED]
12月 04 18:35:33 localhost.localdomain openvswitch[13694]: Inserting openvswitch module [ OK ]
解决办法：
yum install policycoreutils-python.x86_64 0:2.2.5-11.el7
mkdir /etc/openvswitch
semanage fcontext -a -t openvswitch_rw_t “/etc/openvswitch(/.*)?”
restorecon -Rv /etc/openvswitch
再次使用:
systemctl stop openvswitch.service
systemctl start openvswitch.service
再次查看服务状态：systemctl -l status openvswitch.service