project-config/nodepool/elements
Clark Boylan a126f3953f Make journald log collection persistent
We have had some job runs overrun the journald ring buffer which is used
by default resulting in losing older logs during the job runs. Update
the journald configuration to persistently store the journal so that we
can reliably retrieve those logs when jobs complete.

Change-Id: I5626ce76878287be220a8803f9dfe9a9da950d5b
2017-01-03 09:39:06 -08:00
..
cache-bindep Remove 50-cache-pkgs from cache-bindep 2016-11-29 15:41:37 -05:00
cache-devstack Stop caching devstack packages 2016-12-14 09:44:13 -05:00
infra-package-needs nodepool: elements: infra-package-needs: Use the openssh-server element 2016-11-16 11:56:54 +00:00
initialize-urandom Fix typos in initialize-urandom.py & gerrit-git-prep.sh 2016-11-08 03:57:55 +00:00
nodepool-base Make journald log collection persistent 2017-01-03 09:39:06 -08:00
openstack-repos selective caching of git repos 2016-11-23 13:35:29 +02:00
prepare-node Move prepare-node to it's own element 2016-05-19 21:38:11 -05:00
puppet safe override of /etc/resolv.conf 2016-11-07 17:00:03 +02:00
stackviz Disable npm for stackviz on fedora-24 2016-07-13 19:08:44 -04:00
zuul-worker Add Gentoo support to nodepool 2016-10-16 20:37:14 -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.