project-config/nodepool/elements
Ian Wienand b27d4c731e Add newline to zanata source-repository file
Without the newline this falls into the old bash "read" gotcha trick
where the last line will be skipped silently.  This means the client
isn't actualy downloaded.

dib-lint added a check in I23e293b957cd4f008611656cf9166391b1b537a2
and I tested it would have caught this.

Change-Id: Idbae2037f275fad91b87e1cf5ee80663c1f05ddc
2017-12-08 14:27:33 +11:00
..
cache-devstack Add newline to zanata source-repository file 2017-12-08 14:27:33 +11:00
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 Merge "Set unbound logging to debug" 2017-11-28 21:32:52 +00:00
openstack-repos Retire Packaging Deb project repos 2017-12-01 22:24:40 +00:00
zuul-worker make a gentoo nodepool image 2017-10-18 15:20:11 -05:00
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.