Add docker run options to rocker build

[AMWild]

I've been trying out Rocker in order to build an image that I don't want to docker build due to the sheer volume of compiler cruft that can be Mounted instead.

However, I've run into two problems:

1. I need to run the container in --privileged mode as it is being built. Lack of this results in the build failing
2. I need to change the port mapping and use --net=host in order to allow for the idiosyncracies of the application I'm trying to dockerise - it assumes 'localhost' for many of its dependencies that I don't want to add within the container, and having a different IP address to the host leads to failures, while having the same IP address without having certain IP ports mapped to alternate ports leads to other failures.

Ideally, rocker should expose the docker run options in the rocker build options - possibly as a single JSON-encapsulated rocker option.

I may be able to make this change myself in my own fork - if I can figure out just where to make the change. As near as I can tell, you're using github.com/fsouza/go-dockerclient to interact with Docker, and the options can be passed in through CreateContainer and the HostConfig parameter of the CreateContainerOptions struct.

To save me some time, could you tell me just where in all of this code you initialise your own HostConfig for a build and where you read in the build parameters? I should be able to work from there, and if you're interested, I could create a pull request with my changes.

[ctrlok]

@AMWild I made quick PoC here, you can try to use it if you want

[ybogdanov]

Thanks for requesting. Unfortunately, we are discontinuing this project. See the notice here: https://github.com/grammarly/rocker/blob/master/README.md

Closing this issue as we are not able to implement it. Sorry.