Re: [atomic-devel] Fedora 26 change: using overlayfs as default

[Jason Brooks <jbrooks redhat com>]

On Mon, Dec 12, 2016 at 2:46 PM, Dusty Mabe <dusty dustymabe com> wrote:
>
>
> On 12/12/2016 05:41 PM, Jason Brooks wrote:
>> On Mon, Dec 12, 2016 at 2:24 PM, Dusty Mabe <dusty dustymabe com> wrote:
>>>
>>>
>>> On 12/12/2016 05:19 PM, Jason Brooks wrote:
>>>> On Mon, Dec 12, 2016 at 2:12 PM, Dusty Mabe <dusty dustymabe com> wrote:
>>>>>
>>>>> After I get a bug[1] fixed and out the door I'm going to publish
>>>>> a blog post/docs on setting up Fedora 25 Atomic host and/or Cloud
>>>>> base to use overlay2 as the storage driver for docker.
>>>>>
>>>>> I'd like for everyone that can to test this out and to start running
>>>>> their container workloads with overlay2 with selinux enabled and let's
>>>>> file bugs and get it cleaned up for Fedora 26 release.
>>>>
>>>> This makes sense as the default for the docker package for non-atomic
>>>> fedora, since the alternative is loopback storage -- are you
>>>> suggesting this as a change for the atomic host as well? If so, what's
>>>> the rationale there?
>>>>
>>>
>>> I think the rationale is that we'd like to not have a much different
>>> experience whether you are using docker on atomic host or not. My
>>> thoughts are that overlay is where we want to be in the future and
>>> Fedora is the first place we should try that out.
>>
>> It's a matter of choosing harmonization on non-atomic and atomic
>> fedora at the cost of harmonization between centos/rhel/fedora atomic
>> hosts, so there's gain and loss there, but if overlay is where we want
>> to be in the future (I assume "we" is Red Hat?) it makes sense to get
>> on with it.
>>
>
> I wasn't really referring to "we" as Red Hat, although that may be
> true. I was more going for "we" as the community, simply because IMHO
> the whole DM loopback thing has been a source of quite a bit of pain
> with respects to understanding and also "set up" costs and it's not
> something people have had to do on other platforms I don't think.

I'm asking because the DM loopback thing is not an issue or pain point
for the atomic host, so it's not obvious to me that we'd make that the
rationale for changing the storage of the atomic host.

>
> The may drag with overlay in the past has been SELinux. That should be
> fixed now, so let's hammer on it and see if we can break it!!
>
> Dusty