For a very long time we've been parsing and using the lxc images as
provided by upstream lxc. While these images are functional there are by
no means optimal. In general they're quite a bit larger than they need
to be and contian a lot of little sharp edges that have cut us over
the years. This change removes all of the lxc image cache parsing and
meta-data linking and simply downloads the rootfs a given url. To
maintain compatibility with the legacy images a script has been created
to parse the image index and return the legacy image url.
The result of this change:
* Access to smaller more optimal base image which is well known by the
corresponding communities.
* Deployers now have the ability to set and forget the download url for an
internal image instead of having to create a cache infrastructure
compatible with the lxc download template.
* Any rootfs tarball will work as an image.
* Fewer tasks are executed and less memory is consumed resulting in faster
deployment times.
* The base cache has a uniform meta-data setup giving all container
types the same access to config, devices, and templating.
Change-Id: I1775e775bbb7fe86bdffdd8296c2cff5ebc5bac8
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>
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