参考贴：
http://sudomakeinstall.com/linux-systems/installing-openvswitch-on-centos-6-6-5
yum install kernel-headers kernel-devel gcc make python-devel openssl-devel kernel-devel, graphviz kernel-debug-devel automake rpm-build redhat-rpm-config libtool git cd /root/ wget http://ftp.gnu.org/gnu/autoconf/autoconf-2.64.tar.gz tar xvf autoconf-2.64.tar.gz cd autoconf-2.64/ ./configure make make install cd /root/ git clone git://git.openvswitch.org/openvswitch cd openvswitch/ ./boot.sh;./configure; make dist mkdir /root/rpmbuild/SOURCES cp openvswitch*.tar.gz /root/rpmbuild/SOURCES/ rpmbuild -bb rhel/openvswitch.spec rpmbuild -bb rhel/openvswitch-kmod-rhel6.spec rpm -ivh /root/rpmbuild/RPMS/*.rpm
出错：
rpmbuild -bb rhel/openvswitch-kmod-rhel6.spec
produces warning:
Installed (but unpackaged) file(s) found:
/etc/depmod.d/openvswitch.conf
解决：
在openvswitch-kmod-rhel6.spec末尾出添加
%files
%defattr(-,root,root,-)
/etc/depmod.d/openvswitch.conf