History

Ian Wienand 90fcb99cf6 nodepool: infra-package-needs; drop curl c.f. I9ccebe2dbf3a8682dab60c2070c5f78849e01446 The RedHat platforms vary if they come pre-installed with curl or curl-minimal, and if curl-minimal is installed, it causes conflicts when you try to install "curl" (without removing it first, or using "swap"). pkg-map is not designed to deal with this at all; it can't say "curl \| curl-minimal". But all our base images come with curl, because we're using cache-url which uses it. So, in short, drop it here to avoid this conflict. Change-Id: I4e930080f89fe833702f7cafef09642e0638960f		2023-02-02 10:15:25 +11:00
..
cache-devstack	Add py36 variant of get-pip.py	2022-02-02 16:42:04 +01:00
control-plane-minimal	Fix new dib-lint errors	2020-03-11 10:10:57 +11:00
infra-package-needs	nodepool: infra-package-needs; drop curl	2023-02-02 10:15:25 +11:00
initialize-urandom	Fix flake8	2017-10-21 18:37:10 +02:00
nodepool-base	Ensure NetworkManager doesn't override /etc/resolv.conf	2022-12-02 15:10:41 +01:00
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	Remove references to OpenSUSE 423	2019-10-14 09:14:08 -07:00

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.