History

Jeremy Stanley 678c1c81b5 Drop tempfile workaround for aggregate bindep list Since support for using "-f -" to read a package list from stdin is supported in bindep 0.1.0 and later, remove the hacky temporary workaround which stashed it in a tempfile. Change-Id: I02d153113a160028658e38828e113fcf02bc5ab1		2016-03-28 14:03:18 +00:00
..
cache-bindep	Drop tempfile workaround for aggregate bindep list	2016-03-28 14:03:18 +00:00
cache-devstack	Cleanup the early devstack clone script	2016-01-19 11:11:28 +11:00
infra-package-needs	Add element to handle generic package installs	2016-03-17 12:26:58 -07:00
node-devstack	Add element to handle generic package installs	2016-03-17 12:26:58 -07:00
nodepool-base	Add a dib-builddate file	2016-03-01 15:16:15 +11:00
openstack-repos	Don't cache inactive repos	2016-03-05 18:01:08 -08:00
puppet	Add curl package to puppet nodepool element	2016-03-16 16:18:30 +03:00
slave-db	Reorganizes project-config	2014-09-25 11:41:04 -04:00
README.rst	Determine CentOS 6 platform in cache-devstack	2015-05-01 20:57:05 +00:00

README.rst

Using diskimage-builder to build devstack-gate nodes

In addition to being able to just download and consume images that are the same as what run devstack-gate, it's easy to make your own for local dev or testing - or just for fun.

Install diskimage-builder

Install the dependencies:

sudo apt-get install kpartx qemu-utils curl python-yaml

Install diskimage-builder:

sudo -H pip install diskimage-builder

Build an image

Building an image is simple, we have a script!

DISTRO="ubuntu" bash tools/build-image.sh

See the script for environment variables to set distribution, etc. You should be left with a .qcow2 image file of your selected distribution.

It is a good idea to set TMP_DIR to somewhere with plenty of space to avoid the disappointment of a full-disk mid-way through the script run.

While testing, consider exporting DIB_OFFLINE=true, to skip updating the cache.

Mounting the image

If you would like to examine the contents of the image, you can mount it on a loopback device using qemu-nbd.

sudo apt-get install qemu-utils
sudo modprobe nbd max_part=16
sudo mkdir -p /tmp/newimage
sudo qemu-nbd -c /dev/nbd1 /path/to/devstack-gate-precise.qcow2
sudo mount /dev/nbd1p1 /tmp/newimage

or use the scripts

sudo apt-get install qemu-utils
sudo modprobe nbd max_part=16
sudo tools/mount-image.sh devstack-gate-precise.qcow2
sudo tools/umount-image.sh

Other things

It's a qcow2 image, so you can do tons of things with it. You can upload it to glance, you can boot it using kvm, and you can even copy it to a cloud server, replace the contents of the server with it and kexec the new kernel.