tool for image building and update

Steve Loranz sloranz at
Thu Sep 20 19:08:52 UTC 2012

Just a quick note on the difference between ImageFactory and Oz.

Oz creates a KVM image, does a Just Enough OS (JEOS) install of the operating system, and provides a means to adding additional packages to and/or running customization scripts on the OS installed in this image.

ImageFactory creates a base image and then performs the necessary transformations on the image file itself to allow it to be used on any number of clouds (RHEV-M, vSphere, EC2, etc). ImageFactory can then push this image up to a cloud provider/region so that it can be used for instances.

ImageFactory uses Oz to create the base image before transforming that image for use on various clouds. In version 2 of ImageFactory, we introduce a plugin API that allows one to add plugins for new operating systems and/or new cloud types. The Fedora/RHEL plugin we include with ImageFactory uses Oz to create base images for those operating systems, but one could just as easily replace that plugin with one that uses some other library/tool.

If what you are looking for is creating images that will work on multiple clouds, please have a look at ImageFactory. It offers a CLI and REST api. v2 will be officially released soon.

If you just want to create images for use with KVM, Oz is solid.


On Sep 20, 2012, at 12:13 PM, cloud-request at wrote:

> Message: 2
> Date: Thu, 20 Sep 2012 14:24:36 +0000
> From: Tomas Karasek <tomas.karasek at>
> To: "cloud at" <cloud at>
> Subject: tool for image building and update
> Message-ID:
> 	<E77A1A8746A0D749B5BA8052CAFF5A83228EE045 at>
> Keywords: CERN SpamKiller Note: -50
> Content-Type: text/plain; charset="us-ascii"
> Hello,
> I am looking at possibilities of automation of disk image creation (installation) and update.
> I ran across tools from Aeolus: 
> imagefactory -
> and Oz -
> I noticed Oz is used in Heat too. 
> Is there some other tool I could look at?
> Thanks,
> Tomas

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