[one-users] Docker - OpenNebula - Megam

[Megam Systems]

Dear All,

Docker 1.0 was released recently. Megam is a cloud automation engine,
and would like to support this feature.  With the latest release Docker
uses libcontainer.

Our *vision* is to enable and simplify running Docker container images
using Megam on OpenNebula. 

*Terminology:*

  * Docker container image  : A tiny image which can be unwrapped and
    run by "Docker"
  * Docker container : An instance that is  created as a result of
    running the Docker container image.
  * Docker service : A regular Ubuntu or Wheezy VM spinned off by
    OpenNebula having the "docker" executable installed.

 
Docker helps to run container images  very quickly.  A Docker container
image is built by an user. So an user builds the Docker container image
and stores it in a docker registry (this can be public or private). 

An example Docker container image can hold  "apache2" or "postgresql".
Recommendation by Docker is to run just one process.

There are 2 ways in integrating it to OpenNebula.

 1. Docker as a hypervisor which would spin of the user's container
    image in the OpenNebula host.
 2. A Docker service which is stood-up and shared by an user. Multiple
    Docker container can run inside the stood-up Docker service. The
    Docker service will  be owned by the user and the user can stand-up
    multiple Docker container in it.


We would like to hear the communities feedback and thoughts in taking it
forward.

Also how are you using Docker today ? How would like to see it being
used in OpenNebula or using an orchestrator on top of it like Megam.
If you haven't started on using Docker, what are the use cases you are
exploring its use ?

-- 
Cheers,
Megam Systems; http://www.gomegam.com
email : gomegam at megam.co.in; twitter: @megamsystems
web   : http://www.gomegam.com  | try   : https://www.megam.co
blog  : http://blog.megam.co    | github: https://github.com/megamsys

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