Re: [ptxdist] Docker rules

[Mircea Ciocan <m.ciocan@ppc-ag.de>]

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On 27.01.22 18:22, Alexander Dahl wrote:
> Hello Mircea,
>
> On Thu, Jan 27, 2022 at 05:37:01PM +0100, Mircea Ciocan wrote:
>> are there any official or unofficial rules to have docker container support
>> build with PTXDist on aarch64 platforms
> Do you mean running Docker containers on the target?  Or buildung a
> ptxdist based BSP in a Docker container?  AFAIK there's neither one or
> the other.
>
>> or I have to painfully dissect the
>> Yocto's virtualization layer ?
> If you're looking for inspiration for Docker on the target, you might
> as well checkout the buildroot project [1].  That is more or less
> similar to ptxdist conceptually, and IIRC it has support for Docker on
> the target.  Look out for package/docker* in their tree.
>
> Greets
> Alex
>
> [1] https://www.buildroot.org/
Hello everybody and first of all thanks Alexander, indeed I need to be 
able to run docker images on the target.

I don't disagree that docker is overkill for many things, but the 
customer uses docker images for some application distribution and other 
competing platforms supports it.

The mention of buildroot really helped, and to also answer to some 
"answers", that boil down mostly to "why would you need such a 
thing...", we are talking here about an aarch64 platform, with full 
TF-A, OP-TEE, 3GiB RAM and tons of eMMC, that supports natively 
virtualization. A typical docker image for this platform is around 5MiB.

So running docker images there is not some kind of crazy stuff, but it 
is presented like this: "...sure it should work, we use it since years 
since RPi2 devices, have a look...". So the times of Arm 920t or similar 
are coming to an end and will be a great thing if PTXDist will support 
running docker containers in the default rules at least for 64-bit 
architectures.

I, of course, do not suggest to drop everything and integrate docker 
support, but maybe consider it as feature for the near future and not 
black-listed it by default, it's definitely here to stay.

Best regards and a nice and relaxing weekend,

Mircea









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