project-config/nodepool/elements
Matthew Thode 57d7524bbe
Move prepare-node to it's own element
This moves prepare-node out of node-devstack so that cache-devstack is
not included unnecessarilly.  We change openstack-repos and
node-devstack to depend on this element.  The evenual goal is to remove
node-devstack, which will be done in a followup commit.

Change-Id: I4d9ebc3659f5f59cab4d4ab0762e157b6ff11eda
2016-05-19 21:38:11 -05:00
..
cache-bindep Drop tempfile workaround for aggregate bindep list 2016-03-28 14:03:18 +00:00
cache-devstack Fix package and image list comment cleanup 2016-04-19 17:27:14 -07:00
infra-package-needs Add traceroute to default preinstalled packageset 2016-04-04 18:19:36 +00:00
node-devstack Move prepare-node to it's own element 2016-05-19 21:38:11 -05:00
nodepool-base Let dib fix selinux policy for us 2016-04-20 14:30:31 -07:00
openstack-repos Move prepare-node to it's own element 2016-05-19 21:38:11 -05:00
prepare-node Move prepare-node to it's own element 2016-05-19 21:38:11 -05:00
puppet Add curl package to puppet nodepool element 2016-03-16 16:18:30 +03:00
slave-db Reorganizes project-config 2014-09-25 11:41:04 -04:00
README.rst Determine CentOS 6 platform in cache-devstack 2015-05-01 20:57:05 +00:00

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

Install diskimage-builder:

sudo -H pip install diskimage-builder

Build an image

Building an image is simple, we have a script!

DISTRO="ubuntu" bash tools/build-image.sh

See the script for environment variables to set distribution, etc. You should be left with a .qcow2 image file of your selected distribution.

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.