32dcd6af92
We are still working on the caching story for dnf-based builds (i.e. Fedora 22). There are a couple of options which we will work through on the linked page. We will sort this out before we move the devstack job (yet to be created, because the nodes aren't there yet) out of experimental. In the mean time, disable the caching in these elements so we can get Fedora 22 image builds (currently they're in a big looping failure [1]). [1] http://nodepool.openstack.org/image.log Change-Id: I3a435889fc5109d7365240068047aac98abc605e
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-yamlInstall diskimage-builder:
sudo -H pip install diskimage-builderBuild an image
Building an image is simple, we have a script!
DISTRO="ubuntu" bash tools/build-image.shSee 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/newimageor 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.shOther 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.