[RFC] Adding docker driver to libvirt

[Nikolay Shirokovskiy]

Adding to cc again, now keeping mailing list

On 15.04.2020 16:09, Daniel P. Berrangé wrote:
> On Tue, Apr 14, 2020 at 09:56:24AM +0300, nshirokovskiy wrote:
>>
>>
>> On 12.04.2020 12:39, Martin Kletzander wrote:
>>> On Thu, Apr 09, 2020 at 03:30:11PM +0300, nshirokovskiy wrote:
>>>> Hi, all.
>>>>
>>>> Does it make sense to add such a driver? I can't say I have a big picture
>>>> of docker functionality in mind but at least container lifecycle management
>>>> and container networking are common to both.
>>>>
>>>
>>> I think we had something in virt-tools that was able to pull an image from
>>> docker hub and run it with lxc.  Or was it part of sandbox?  I don't know.
>>>
>>> Anyway, what would be the benefit of that?
>>>
>>
>> We wanted to add Windows containers to the libvirt API. They are available
>> under docker API thus the idea to add a docker driver. The docker itself
>> uses some API to manage Windows containers but this API lacks documentation
>> thus again the willingness to use just docker API to bring Windows containers
>> to libvirt.
> 
> The container based drivers in libvirt have been a bit of a square-peg /
> round-hole thing. Given that we have a couple of them already (LXC,
> OpenVZ, VZ), I wouldn't say no to adding a docker one too. The only
> real issue is having people willing to do the work to implement it and
> then maintain it thereafter.
> 
> Describing the scope of the desired work is probably useful. With docker,
> a big part is in the image download/listing/upload and build process.
> The container lifecycle is only a small part of the API coverage. The
> image parts have no mapping in libvirt, and I'm not sure whether we
> should to expand libvirt scope to that too.
> 
> Regards,
> Daniel
>