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

openvswitch.service - LSB: Open vSwitch switch
   Loaded: loaded (/etc/rc.d/init.d/openvswitch)
   Active: active (running) since 四 2014-12-04 18:38:52 CST; 6s ago
  Process: 13741 ExecStart=/etc/rc.d/init.d/openvswitch start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/openvswitch.service
           ├─13724 ovs-vswitchd: monitoring pid 13725 (healthy)                                                                                                                                                                                    
           ├─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
           ├─13764 ovsdb-server: monitoring pid 13765 (healthy)                                                                                                                                                                                                                                                                                                                                                        
           └─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


12月 04 18:38:51 localhost.localdomain systemd[1]: Starting LSB: Open vSwitch switch...
12月 04 18:38:51 localhost.localdomain openvswitch[13741]: /etc/openvswitch/conf.db does not exist ... (warning).
12月 04 18:38:51 localhost.localdomain openvswitch[13741]: Creating empty database /etc/openvswitch/conf.db [  OK  ]
12月 04 18:38:52 localhost.localdomain openvswitch[13741]: Starting ovsdb-server [  OK  ]
12月 04 18:38:52 localhost.localdomain openvswitch[13741]: Configuring Open vSwitch system IDs [  OK  ]
12月 04 18:38:52 localhost.localdomain openvswitch[13741]: ovs-vswitchd is already running.
12月 04 18:38:52 localhost.localdomain openvswitch[13741]: Enabling remote OVSDB managers [  OK  ]
12月 04 18:38:52 localhost.localdomain systemd[1]: Started LSB: Open vSwitch switch.
12月 04 18:38:52 localhost.localdomain openvswitch[13694]: Starting ovs-vswitchd [  OK  ]
12月 04 18:38:52 localhost.localdomain openvswitch[13694]: Enabling remote OVSDB managers [  OK  ]

安装完成。