[openstack-dev] [kolla] Gate precheck job failed due to minimum kernel version on ubuntu 14.04

Steven Dake (stdake) stdake at cisco.com
Mon May 9 14:42:10 UTC 2016

On 5/8/16, 7:55 AM, "Monty Taylor" <mordred at inaugust.com> wrote:

>On 05/08/2016 03:45 AM, Steve Kowalik wrote:
>> On 08/05/16 08:11, lương hữu tuấn wrote:
>>> Hi,
>>> @Robert: I was successful to update the kernel without change the
>> But that was Robert's point entirely. Installing the kernel will work
>> fine, but it does not get you running that kernel -- also like Robert
>> said, you need to change the image to run a different kernel than what
>> it has installed.
>We will be changing our images this cycle to Xenial from Trusty. I do
>not believe we have any intention of installing backported wily kernels
>in our trusty images, as what we want to test on them is Trusty.
>However, the Xenial transition should be happening soon enough - so
>things that need a newer kernel this release can happily just require
>Xenial images for testing.
>I think the question of why/how kolla grew a dependency on a newer
>kernel than what trusty has is worth checking. As of right now, trusty
>kernels are the newest thing supported in the gate.


One of our dependencies, Docker, only works with the btrfs storage driver
on Trusty.  All other storage drivers for Trusty are DOA on Trusty without
kernel recompiles.  CentOS 7 works well with all storage drivers, although
overlayfs is a little flakey when building images because of  the yum OVL
plugin.  We recommend in the docs to upgrade the kernel to Willy howver
Xenail should work as well.

What comes out of this is a recommendation to use BTRFS as the storage
backend when using Trusty.  We should be documenting that anyway.


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