[openstack-dev] [neutron][infra] Functional job failure rate at 100%

Mooney, Sean K sean.k.mooney at intel.com
Thu Aug 10 17:13:58 UTC 2017

From: Miguel Angel Ajo Pelayo [mailto:majopela at redhat.com]
Sent: Thursday, August 10, 2017 8:55 AM
To: OpenStack Development Mailing List (not for usage questions) <openstack-dev at lists.openstack.org>
Subject: Re: [openstack-dev] [neutron][infra] Functional job failure rate at 100%

Good (amazing) job folks. :)

El 10 ago. 2017 9:43, "Thierry Carrez" <thierry at openstack.org<mailto:thierry at openstack.org>> escribió:
Oh, that's good for us. Should still be fixed, if only so that we can
test properly :)

Kevin Benton wrote:
> This is just the code simulating the conntrack entries that would be
> created by real traffic in a production system, right?
> On Wed, Aug 9, 2017 at 11:46 AM, Jakub Libosvar <jlibosva at redhat.com<mailto:jlibosva at redhat.com>
> <mailto:jlibosva at redhat.com<mailto:jlibosva at redhat.com>>> wrote:
>     On 09/08/2017 18:23, Jeremy Stanley wrote:
>     > On 2017-08-09 15:29:04 +0200 (+0200), Jakub Libosvar wrote:
>     > [...]
>     >> Is it possible to switch used image for jenkins machines to use
>     >> back the older version? Any other ideas how to deal with the
>     >> kernel bug?
>     >
>     > Making our images use non-current kernel packages isn't trivial, but
[Mooney, Sean K]  so on that it would bre quite trivial to have disk image builder install
The linux-image-virtual-hwe-16.04 linux-image-virtual-hwe-16.04-edge to pull in a 4.10 or
4.11 kernel respctivly if the default 4.4 is broken. We just need a new dib element to install the package
And modify the  nodepool config to include it when it rebuildes the image every night. Alternitivly
You can pull a vanilla kernel form http://kernel.ubuntu.com/~kernel-ppa/mainline/
Follow the process documented here https://wiki.ubuntu.com/Kernel/MainlineBuilds
If you want to maintain testing with 4.4.x

>     > as Thierry points out in his reply this is not just a problem for
>     > our CI system. Basically Ubuntu has broken OpenStack (and probably a
>     > variety of other uses of conntrack) for a lot of people following
>     > kernel updates in 16.04 LTS so the fix needs to happen there
>     > regardless. Right now, basically, Ubuntu Xenial is not a good
>     > platform to be running OpenStack on until they get the kernel
>     > regression addressed.
>     True. Fortunately, the impact is not that catastrophic for Neutron as it
>     might seem on the first look. Not sure about the other projects, though.
>     Neutron doesn't create conntrack entries in production code - only in
>     testing. That said, agents should work just fine even with the
>     kernel bug.

Thierry Carrez (ttx)

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