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FYI, I filed a bug about this issue
https://bugs.launchpad.net/kolla/+bug/1579583

- Hui

On Mon, May 9, 2016 at 10:42 AM, Steven Dake (stdake) <stdake at cisco.com> wrote:
>
>
> 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
>>>>image.
>>>
>>> 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.
>
> Monty,
>
> 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.
>
> Regards
> -steve
>
>>
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