[ovs-discuss] Failed to build Open vSwitch Kernel Modules on CentOS 7 (kernel 3.10.0-514.2.2.el7.x86_64)

[Ben Pfaff]

On Wed, Jan 11, 2017 at 03:03:45PM -0800, Joe Stringer wrote:
> On 9 January 2017 at 19:01, liu yulong <liuyulong.xa at gmail.com> wrote:
> > Hi experts,
> >
> > We have failed to build Open vSwitch Kernel Modules on CentOS 7 (kernel
> > 3.10.0-514.2.2.el7.x86_64).
> >
> > Here are some traces we got:
> > http://paste.openstack.org/show/594350/
> >
> > Steps:
> > 1. download the current openvswitch release:
> > http://openvswitch.org/releases/openvswitch-2.6.1.tar.gz
> >
> > 2. rpmbuild
> > (1) prepare the SOURCE
> > cp openvswitch-2.6.1.tar.gz ~/rpmbuild/SOURCES/
> > tar -zxvf openvswitch-2.6.1.tar.gz
> > cp ./openvswitch-2.6.1/rhel/* ~/rpmbuild/SOURCES/
> > cp ./openvswitch-2.6.1/rhel/*.spec ~/rpmbuild/SPECS/
> >
> >
> > (2) edit ~/rpmbuild/SPECS/openvswitch-kmod-fedora.spec
> > change the #%define kernel to:
> > #%define kernel 3.10.0-514.2.2.el7.x86_64
> >
> > (3) start build
> > rpmbuild -bb --without check ~/rpmbuild/SPECS/openvswitch-kmod-fedora.spec
> >
> > Then we get that error. So can anyone help to solve such issue?
> > Thank you.
> 
> If you want to use the kernel module from the OVS tree, you need to
> use master or wait for the next version of OVS. Alternatively you can
> skip using the kernel module from OVS tree and only compile the
> userspace programs, then use the kernel module that is provided with
> Centos 7.

Maybe liu is confused because the FAQ that comes with OVS 2.6.1 says
that the kernel module should work with Linux 3.10.  Maybe it does not
work because Centos kernels diverge from upstream.