History

Dirk Mueller 6864367ad8 Remove unnecessary distribution determination The need for the distribution was removed in I249f21a98fea3b963b7ffb8e3d0fce02cc540d46 so we can remove the code around that was determining it but not actually making use of it anywhere anymore. Change-Id: I572943bbc0c2665a885b7a80cdb2d1817c61bc3c		2018-03-02 01:55:11 +01:00
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cache-devstack	Remove unnecessary distribution determination	2018-03-02 01:55:11 +01:00
infra-package-needs	Don't install centos-release-openstack-ocata	2017-11-23 19:25:37 +00:00
initialize-urandom	Fix flake8	2017-10-21 18:37:10 +02:00
jenkins-slave	make a gentoo nodepool image	2017-10-18 15:20:11 -05:00
nodepool-base	Move jenkins/data/bindep-fallback.txt (2/2)	2018-02-20 20:52:47 +01:00
openstack-repos	Retire Packaging Deb project repos	2017-12-01 22:24:40 +00:00
zuul-worker	Remove zuul-sudo-grep lines from nodepool	2018-02-05 21:43:38 +01:00
README.rst	Update doc to have 'debootstrap' dep and describe minimal	2016-10-12 19:27:05 -07:00
bindep-fallback.txt	Move jenkins/data/bindep-fallback.txt (1/2)	2018-02-20 20:52:17 +01:00

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.