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

LIU Yulong liuyulong.xa at gmail.com
Thu Jan 12 05:31:44 UTC 2017


Great, that patch works for me.
After cherry-picked that patch to 2.6.1, we can also build the 2.6.1 ovs
kmod.
Thank you very much.

On Thu, Jan 12, 2017 at 10:21 AM, Joe Stringer <joe at ovn.org> wrote:

> Does your master include this commit?
>
> https://github.com/openvswitch/ovs/commit/6ccf21ca77ec092aa6
> 3b3daff66dc9f0d0e1be93
>
> On 11/01/2017 18:14, "liu yulong" <liuyulong.xa at gmail.com> wrote:
>
> Thanks Joe and Ben, actually the master branch we also got such error.
> The doc we followed is "Fedora, RHEL 7.x Packaging for Open vSwitch" [1].
> The conflicting shown in [2] was basically same.
>
> [1] https://github.com/openvswitch/ovs/blob/master/Documentation
> /intro/install/fedora.rst
> [2] http://paste.openstack.org/show/594350/
>
> On Thu, Jan 12, 2017 at 7:51 AM, Joe Stringer <joe at ovn.org> wrote:
>
>> On 11 January 2017 at 15:38, Ben Pfaff <blp at ovn.org> wrote:
>> > 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-k
>> mod-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.
>>
>> True, it's a bit confusing. The FAQ distributed with 2.6 specifically
>> states the supported versions, with this caveat:
>>
>> "The Linux kernel versions are upstream kernel versions, so Linux
>> kernels modified from the upstream sources may not build in some cases
>> even if they are based on a supported version. This is most notably
>> true of Red Hat Enterprise Linux (RHEL) kernels, which are extensively
>> modified from upstream."
>>
>> https://github.com/openvswitch/ovs/blob/branch-2.6/FAQ.md#q-
>> what-linux-kernel-versions-does-each-open-vswitch-release-work-with
>>
>
>
>
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