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Ian Wienand 9cd35c36e4 Fix startup race with growroot/systemd
Tucked away in systemd-udev-settle.service is the following comment

 # This service can dynamically be pulled-in by legacy services which
 # cannot reliably cope with dynamic device configurations, and
 # wrongfully expect a populated /dev during bootup.

The info that the growroot script is querying is populated via udev,
particularly the blkid bits of [1].  This creates a race-condition
where sometimes udev has been triggered and the rules have applied and
sometimes not.  Obviously in the first case, the root disk is not
grown correctly.

systemd-udev-settle is mostly disabled on distros because it can cause
an increase in boot-time for systems with lots of disks; this is not
our situation so it makes basically no difference.

That said, I will investigate if some systemd people know even better
ways to do this (possibly the service should depend on block .device
targets in systemd, and then filter out and only apply to the root
disk?)

[1] https://github.com/systemd/systemd/blob/master/rules/60-persistent-storage.rules#L66

Change-Id: I453e3afcd953dfc29ab6c42ddc81e940cfa70ee0
2016-02-10 13:47:18 +11:00
bin Fix Gentoo hardened support 2016-02-01 20:56:37 -06:00
diskimage_builder Remove outdated translation files 2016-01-31 20:31:29 +01:00
doc/source Move speedup section to image building guide 2016-01-18 07:02:00 +00:00
elements Fix startup race with growroot/systemd 2016-02-10 13:47:18 +11:00
lib Cleanup unmount_dir function 2016-01-28 14:47:43 +11:00
tests Merge "Don't use wc -l for the umount check" 2016-01-29 04:35:28 +00:00
.gitignore Ignore manifest outputs more carefully. 2014-06-26 04:29:51 +12:00
.gitreview Update stackforge references to openstack 2013-08-17 22:58:26 -04:00
.testr.conf Add unit test for cache-url 2014-09-30 16:39:21 -05:00
babel.cfg Make it possible for openstack-CI to run tests 2013-02-04 22:26:17 -08:00
LICENSE Fix copyrights for HP work. 2012-11-15 16:20:32 +13:00
MANIFEST.in Remove old entries from MANIFEST.in 2015-09-02 15:15:13 +10:00
README.rst Make README.rst a bit more generic 2015-09-16 13:52:43 +10:00
requirements.txt Updated from global requirements 2016-01-28 13:19:08 +00:00
setup.cfg Remove deprecated disk-image-get-kernel 2015-07-06 16:44:07 +00:00
setup.py Updated from global requirements 2015-09-22 09:17:08 +00:00
test-requirements.txt Updated from global requirements 2016-01-22 04:03:13 +00:00
tox.ini Deprecated tox -downloadcache option removed 2015-12-11 22:58:50 +01:00

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
<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/

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.