History

Jeremy Stanley 16ddb49e48 Drop libvirt-python from suse in bindep fallback The bindep fallback list includes a libvirt-python package for all RPM-based distros, but it appears that OpenSuse Leap has recently dropped this (likely as part of removing Python 2.7 related packages). Exclude the package on that platform so that the opensuse-15 job will stop failing. Change-Id: I0bb7d9b7b34f4f6c392374182538b7e433617e13		2023-09-06 15:15:03 +00:00
..
cache-devstack	Cache new cirros images	2023-06-01 16:26:54 +00:00
control-plane-minimal	Fix new dib-lint errors	2020-03-11 10:10:57 +11:00
infra-package-needs	Build debian bookworm images	2023-07-03 06:05:36 +00:00
initialize-urandom	Fix flake8	2017-10-21 18:37:10 +02:00
nodepool-base	Fix unbound setup for debian-bookworm	2023-07-04 09:37:49 +02:00
openstack-repos	nodepool elements: use yaml.safe_load	2021-11-05 11:25:17 +11:00
zuul-worker	zuul-worker: remove additional install of apt-transport-https	2020-04-03 09:20:21 -05:00
README.rst	Update doc to have 'debootstrap' dep and describe minimal	2016-10-12 19:27:05 -07:00
bindep-fallback.txt	Drop libvirt-python from suse in bindep fallback	2023-09-06 15:15:03 +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 debootstrap

Install diskimage-builder:

sudo -H pip install diskimage-builder

Build an image

Building an image is simple, we have a script!

bash tools/build-image.sh

See the script for environment variables to set distribution, etc. By default it builds an ubuntu-minimal based image. You should be left with a .qcow2 image file of your selected distribution.

Infra uses the -minimal build type for building Ubuntu/CentOS/Fedora. For example: ubuntu-minimal.

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.