docker2vagrant

Simple script to transform a Dockerfile into a Vagrantfile.

Needs this some days ago, did this script, thought it might be useful to someone else too.

Prerequisite

• vagrant
• perl

What is working

• Transform all the run commands from the Dockerfile, into a provision script named bootstrap.sh.
• Create a new Vagrantfile with the specified box (or precise64 by default).
• Forward all the exposed ports of the Dockerfile. All the exposed guest ports are forwarded to the host ports with the same number, except for system ports (<= 1024), for those ones, 9000 is added (for example 80 will be forwarded to 9080).
• Copy all the files in the vagrant VM that were copied into the docker using ADD commands (commands appended in the bootstrap script).
• Create a service that launch the docker command (CMD) during the VM startup (if one was specified).

What is not working

Don't know yet. Might be a lot of things though. Just tested this on some Dockerfile I'd got on my computer.

How to

The simple way to use this script, is to place the command line where the docker image is. And to just launch the script.

/path/docker/image$ /path/script/docker2vagrant

Some options can be used:

-f or --file    -> specify the Dockerfile path    (default is ./Dockerfile)
-b or --box     -> specify the vagrant box to use (default is precise64)
-u or --url     -> specify the vagrant box url    (default is http://files.vagrantup.com/precise64.box)
-o or --output  -> specify the output path        (default is .) (NOT YET TESTED)

Appendix

Vagrant is releasing a new feature in its 1.6 version permitting to provision a vagrant image with docker. http://www.vagrantup.com/blog/feature-preview-vagrant-1-6-docker-dev-environments.html So once released, it might be more straightforward to use this new feature, than a custom script.