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Make README.rst a bit more generic

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I think diskimage-builder has grown somewhat since this was written,
and this makes it sound like it is only useful as a TripleO component.

Give a more generic overview, add a simple example to illustrate the
point and generally make it clear this is a flexible solution for
building disk images.  Add a mention of the local documentation
source.

Change-Id: I74f13ccc1e3fe50ac907efcc7f479e59fe44455c
This commit is contained in:
Ian Wienand 2015-08-28 11:48:58 +10:00
parent 6afe6577ac
commit 5bae00db0c
1 changed files with 23 additions and 12 deletions
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README.rst
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@ -1,21 +1,32 @@
Image building tools for OpenStack
==================================
These tools are the components of TripleO
(https://wiki.openstack.org/wiki/TripleO) that are responsible for
building disk images.
``diskimage-builder`` is a flexible suite of components for building a
wide-range of disk images, filesystem images and ramdisk images for
use with OpenStack.
This repository has the core functionality for building disk images, file
system images and ramdisk images for use with OpenStack (both virtual and bare
metal). The core functionality includes the various operating system specific
modules for disk/filesystem images, and deployment and hardware inventory
ramdisks.
This repository has the core functionality for building such images,
both virtual and bare metal. Images are composed using `elements`;
while fundamental elements are provided here, individual projects have
the flexibility to customise the image build with their own elements.
The TripleO project also develops elements that can be used to deploy
OpenStack itself. These live in the TripleO elements repository
(https://git.openstack.org/cgit/openstack/tripleo-image-elements).
For example::
Online documentation:
$ DIB_RELEASE=trusty disk-image-create -o ubuntu-trusty.qcow2 vm ubuntu
will create a bootable Ubuntu Trusty based ``qcow2`` image.
``diskimage-builder`` is useful to anyone looking to produce
customised images for deployment into clouds. These tools are the
components of `TripleO <https://wiki.openstack.org/wiki/TripleO>`__
that are responsible for building disk images. They are also used
extensively to build images for testing OpenStack itself, particularly
with `nodepool
<http://docs.openstack.org/infra/system-config/nodepool.html>`__.
Platforms supported include Ubuntu, CentOS, RHEL and Fedora.
Full documentation, the source of which is in ``doc/source/``, is
published at:
* http://docs.openstack.org/developer/diskimage-builder/