add support for DOCKER_PRVILEGED flag on register

[djskinner]

To allow CI runners that using docker in docker mode: http://docs.gitlab.com/ce/ci/docker/using_docker_build.html

[sameersbn]

should we be checking if RUNNER_EXECUTOR is docker before adding the flag?

[djskinner]

Yes it makes sense. My bash skills are pretty poor but I'll have a bash at it nonetheless.

[djskinner]

I'm not sure exactly what you mean @Firef0x. Can you elaborate? I'm have been following the 'use docker-in-docker executor` instructions here: http://docs.gitlab.com/ce/ci/docker/using_docker_build.html to get it working.

[djskinner]

As a quick update I'm still trying to work my way through the best approach. The container registry announcement probably throws in some more things to consider.

I'm now wondering if privileged / DIND is required at all for my needs.

See here:

https://gitlab.com/gitlab-org/gitlab-ce/issues/17769

@Firef0x I think I have a better understanding of what you meant now, would I be right in thinking I could also bind-mount the docker socket in the same was you suggested for --privileged?

I guess I'm just confused why the docker-privileged and --docker-volumes commands are required on the register command. Are both actually required?

[Firef0x]

@djskinner Sorry that I used a different way here to run Docker in the Runner. (replace the base image with gitlab/dind) It seems to be a good way to simply set --executor=docker but I also want to run Node.js test in the same Runner. I'll consider merging your request in my own repo. Thx a lot ! 🙇

[oomathias]

In case someone is interested I did this https://github.com/oomathias/docker-gitlab-ci-multi-runner/tree/1.5.3

It's based on alpine, I do not use dind but /var/run/docker.sock:/var/run/docker.sock:ro
Added support to --env with ENV_VARS, since I need to pass environment variables to my docker.

You can try the build with docker pull quay.io/oomathias/docker-gitlab-ci-multi-runner:1.5.3.

Please do not use that in prod, I'm not sure to maintain it. So for now you should do your own image. Also, image is only 70Mb :)

[djskinner]

Closing in favour of #29