Ubuntu从源码安装/升级OpenvSwitch

Ubuntu从12.04开始已经自带了OpenvSwitch包，然而自带的包版本较低（1.4.0），如果想要尝试较新的版本，则需要进行手动安装。
需要注意ovs对linux kernel版本的要求。

 Open vSwitch   Linux kernel
   ------------   -------------
       1.4.x      2.6.18 to 3.2
       1.5.x      2.6.18 to 3.2
       1.6.x      2.6.18 to 3.2
       1.7.x      2.6.18 to 3.3
       1.8.x      2.6.18 to 3.4
       1.9.x      2.6.18 to 3.6

   Open vSwitch userspace should also work with the Linux kernel module
   built into Linux 3.3 and later.

   Open vSwitch userspace is not sensitive to the Linux kernel version.
   It should build against almost any kernel, certainly against 2.6.18
   and later.

apt-get update
apt-get install -y git python-simplejson python-qt4 python-twisted-conch automake autoconf gcc uml-utilities libtool build-essential git pkg-config libssl-dev

#Configure openvswitch
./boot.sh && ./configure --prefix=/usr --localstatedir=/var --sysconfdir=/etc --libdir=/usr/lib  --with-linux=/lib/modules/`uname -r`/build;

#modify utility/ovs-lib
mv utility/ovs-lib utility/ovs-lib.bak

#Compile and install openvswitch
make || print "make failed" && exit
sudo su;
make install;

 #should be the same already.
cp utility/ovs-lib /usr/share/openvswitch/scripts/

update system modules

rmmod bridge >/dev/null

rmmod openvswitch >/dev/null 2>&1

cp datapath/linux/openvswitch.ko /lib/modules/`uname -r`/updates/dkms/

cp datapath/linux/brcompat.ko /lib/modules/`uname -r`/updates/dkms/

insmod /lib/modules/`uname -r`/updates/dkms/openvswitch.ko || print "insmod failed, check dmesg" && exit

insmod /lib/modules/`uname -r`/updates/dkms/brcompat.ko || print "insmod failed, check dmesg" && exit

编辑/etc/default/openvswitch-switch中，开启brcompat。

service openvswitch-switch restart