Add Local FS Support for Registry Service about docker-formula

[nmadhok]

@cdarwin Would it be possible for you to submit a Pull Request for this? Thanks for filing the issue!

[cdarwin]

Yes, I created these issues to outline the improvements I intend to make. Feedback welcome.

[Arabus]

I'd definately support that request - using a local filebased registry comes in handy. Especially if you have docker containers you do not want to share with amazon or the nsa ;-)

Should not be that hard, just some jinja magic in the upstart script. Though if you want to support more than just debian & ubuntu you might want to move that docker run ... snippet to a general shell script or even a full blown init script.

[tiadobatima]

@cdarwin @Arabus

With #40, the registry now becomes a lot more configurable.

For registry 2.x:

registry:
  lookup:
    version: 2
    runoptions:
      - "-e REGISTRY_STORAGE_FILESYSTEM_ROOTDIRECTORY=/somewhere"
      - "-v /my-registry-dir:/somewhere"

For registry < 2 you'd need to find out what the environment variables are. I made sure the formula is backwards compatible with the old pillar configs, ie when we don't specify version, but I haven't put much effort in testing the versioned configs with the old registry 0.9.x. It should work, but... ;)

Let me know if you find any problem