project-config/nodepool/elements
Paul Belanger 28a084b3e4
Clone zuul from git.openstack.org for zuul-env
Break the dependency on openstack-repos as we are considering removing
this element for zuulv3.  Also, this is a requirement if for us maybe
building our project-config nodepool images in the gate.

Change-Id: I3bddca68385dc6c765fefb01e3042a48c4df5b3d
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
2017-05-03 10:24:19 -04:00
..
cache-devstack Move jenkins cache to /opt/cache 2017-04-28 16:00:23 +10:00
infra-package-needs Remove cache-bindep element 2017-05-01 17:32:42 -04:00
initialize-urandom Fix typos in initialize-urandom.py & gerrit-git-prep.sh 2016-11-08 03:57:55 +00:00
jenkins-slave Let the jenkins user own the cache files 2017-04-29 01:39:15 +02:00
nodepool-base Clone zuul from git.openstack.org for zuul-env 2017-05-03 10:24:19 -04:00
openstack-repos Merge "cleanup: remove unused clone of system-config" 2017-05-01 14:19:20 +00:00
prepare-node Stop installing and running puppet in node builds 2017-04-27 23:23:32 +02:00
stackviz Update nodepool elements for openSUSE Leap 42.2 2017-02-28 10:54:53 +01:00
zuul-worker Always add zuul group to zuul user 2017-04-28 10:14:59 +02:00
README.rst Update doc to have 'debootstrap' dep and describe minimal 2016-10-12 19:27:05 -07:00

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.