diskimage-builder/elements/fedora/README.md

Use Fedora cloud images as the baseline for built disk images.

Overrides:

 * To use a non-default URL for downloading base Fedora cloud images,
   use the environment variable DIB\_CLOUD\_IMAGES
 * To download a non-default release of Fedora cloud images, use the
   environment variable DIB\_RELEASE
 * Alternatively, set DIB\_LOCAL\_IMAGE to the local path of a qcow2 cloud
   image. This is useful in that you can use a customized or previously built
   cloud image from diskimage-builder as input. The cloud image does not have
   to have been build by diskimage-builder. It should be a full disk image,
   not just a filesystem image.
New element that uses a fedora cloud image as the base. Change-Id: I7d83bb2b359e7a8c3858eca04c96e35cf4e1fe9e 2013-02-13 22:16:00 +00:00			`Use Fedora cloud images as the baseline for built disk images.`
Migrate cloud image URL/Release options to DIB_. This switches $CLOUD_IMAGES and $RELEASE to the DIB_ namespace so they will survive future changes to the sanitisation of the build environment. Change-Id: I7dc2aa82fb9ef452705b080cc404f41046014f20 2013-04-12 13:41:32 +00:00
			`Overrides:`

			`* To use a non-default URL for downloading base Fedora cloud images,`
			`use the environment variable DIB\_CLOUD\_IMAGES`
			`* To download a non-default release of Fedora cloud images, use the`
			`environment variable DIB\_RELEASE`
Add ability to use local cloud image Adds the ability to set $DIB_LOCAL_IMAGE to use as the base cloud image for a Fedora image build. There are many repetitve tasks that are done every image build. With this change you can build an image with the fedora and vm element and then reuse the resulting image as input to future image builds. This greatly reduces future image build times. For instance 99-up-to-date is already taking almost 2 minutes (even with rpm downloads already cached) for Fedora 20, and is only going to keep taking longer. By having a local up to date Fedora cloud image, this time can be saved on each image build. There is one minor change to support this in that /tmp/grub needs to get cleaned up at the end of image builds so that the image can be reused. Plus, there is no reason for it to stick around anyway. (didn't think this was worth a seperate commit). Change-Id: Ic74d138da922ecc99c38c27f105170d90009a84a 2014-01-21 14:46:06 +00:00			`* Alternatively, set DIB\_LOCAL\_IMAGE to the local path of a qcow2 cloud`
			`image. This is useful in that you can use a customized or previously built`
			`cloud image from diskimage-builder as input. The cloud image does not have`
			`to have been build by diskimage-builder. It should be a full disk image,`
			`not just a filesystem image.`