Docker support in kernel

[Petr Pridal]

Hi,

ChromeOS is beautiful. It would be cool to use Docker on an Intel Chromebook in the Developer mode - it would turn it into a true web developer machine.

I installed the Crouton and the latest Docker software. It starts, the daemon runs, it downloads the container images from Docker Hub, but then launching the container ends with an error message: "too many levels of symbolic links".

It seems it is related to default LSM (linux security model) settings in the ChromeOS kernel, and it can be avoided by recompiling the Chromium kernel as described at https://github.com/docker/docker/issues/15679 and step-by-step at 

https://gist.github.com/christianbundy/ba62890a7c2f8128bcbb

Chrome OS team recently announced the Google Play support via containers, and this is going to be available on all machines with kernels 3.10+ supporting the container technology, after the system update. See the discussion at https://productforums.google.com/forum/#!topic/chromebook-central/Pd0CY3oi1cA

My questions:

- Is there any way how to (in a developer mode with crouton) use the standard Chrome OS kernel and still start docker containers on the machine?

- Does the update bringing Google Play mean also improved support of Docker in crouton?

Thanks for any comments, tips or insights!

Cheers,

Petr

P.S.

I saw another approach - using the docker images with an alternative RKT container engine: http://blog.vantol.org/running-docker-containers-on-a-chromebook-with-rkt/.

[Trever]

Does this help?

https://github.com/dnschneid/crouton/issues/364#issuecomment-111264175

[Petr Pridal]

Trever,

thanks for the reply. I am afraid the linked thread does not really help much... but it brings some insights.

I can confirm the latest kernel (3.18 on my Acer Chromebook 14), has a support for containers included, as I have been able to start a docker container via RKT engine:

wget https://github.com/coreos/rkt/releases/download/v1.8.0/rkt-v1.8.0.tar.gz

tar xzvf rkt-v1.8.0.tar.gz

cd rkt-v1.8.0

sudo ./rkt run --insecure-options=image docker://hello-world

or

sudo ./rkt run --net=host --insecure-options=image docker://redis

But I have no success with the docker engine itself, nor some of the docker images.

- Anybody out there running successfully docker on a Chromebook?

- Is there a change coming up with the release of Android in a container?

Regards,

Petr

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[Cathleen Turner]

Hey Petr,

Did you ever get docker working? What crouton flavor do you use?

I hit a wall too. I am exploring other solutions. I am currently using trusty.

[Paco Gb]

Hi Petr and Cathleen,

Any news on this subject, Im trying to get them working too. Im thinking of trying this method:

 https://gist.github.com/christianbundy/ba62890a7c2f8128bcbb

But it would be great to get them working in vanilla ChromeOS

Thanks

[Cathleen Turner]

Hi Paco,

I ended up going about this problem differently. I set up a personal ubuntu dev server and I ssh into it or work on it through cloud9. That way I am able to do my development work remotely via my chromebook. Everything has been going great so far. I haven't seen this solution before, how did it go for you?

Thanks,

Cat 

[Paco Gb]

Hi Cathleen,

I'm trying to compile the kernel and load it in a ChromeOS installation, unfortunately without success so far. I'll keep you updated.