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Ian Wienand 1d1e4ccb3e Move rollback into NodeBase object
Currently we pass a reference to a global "rollback" list to create()
to keep rollback functions.  Other nodes don't need to know about
global rollback state, and by passing by reference we're giving them
the chance to mess it up for everyone else.

Add a "add_rollback()" function in NodeBase for create() calls to
register rollback calls within themselves.  As they hit rollback
points they can add a new entry.  lambda v arguments is much of a
muchness -- but this is similar to the standard atexit() call so with
go with that pattern.  A new "rollback()" call is added that the
driver will invoke on each node as it works its way backwards in case
of failure.

On error, nodes will have rollback() called in reverse order (which
then calls registered rollbacks in reverse order).

A unit test is added to test rollback behaviour

Change-Id: I65214e72c7ef607dd08f750a6d32a0b10fe97ac3
2017-06-08 17:14:20 +10:00
bin Allow ELEMENTS_DIR to be configurable 2017-03-14 09:57:10 -06:00
diskimage_builder Move rollback into NodeBase object 2017-06-08 17:14:20 +10:00
doc Remove ccache 2017-05-31 08:28:09 +10:00
releasenotes Remove dracut-network element 2017-05-31 08:36:56 +10:00
tests Add a keep-output flag for functional tests 2017-06-07 11:47:12 +10:00
.gitignore Use sphinx warning-is-error 2017-03-14 14:49:49 +11:00
.gitreview Update stackforge references to openstack 2013-08-17 22:58:26 -04:00
.testr.conf Fix coverage report 2017-01-18 16:14:01 +11:00
babel.cfg Make it possible for openstack-CI to run tests 2013-02-04 22:26:17 -08:00
bindep.txt Use https in docs links 2017-06-05 22:54:23 +07:00
LICENSE Fix copyrights for HP work. 2012-11-15 16:20:32 +13:00
pylint.cfg Refactor: use lazy logging 2017-05-30 14:39:58 +10:00
README.rst Use https in docs links 2017-06-05 22:54:23 +07:00
requirements.txt Use networkx for digraph 2017-05-26 11:42:10 +10:00
setup.cfg Use https in docs links 2017-06-05 22:54:23 +07:00
setup.py Updated from global requirements 2017-03-13 19:30:19 +00:00
test-requirements.txt Updated from global requirements 2017-06-06 12:13:28 +00:00
tox.ini Add env var to dump config graph 2017-06-08 05:04:58 +00:00

Image building tools for OpenStack
==================================

``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 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.

For example::

  $ 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
<https://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:

* https://docs.openstack.org/developer/diskimage-builder/

Copyright
=========

Copyright 2012 Hewlett-Packard Development Company, L.P.
Copyright (c) 2012 NTT DOCOMO, INC.

All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may
not use this file except in compliance with the License. You may obtain
a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations
under the License.