7521476a99
This commit is a verbatim copy of the nodepool/elements directory in the openstack/project-config repo. Change-Id: I86768fcda43f2997700ce748ba7118a2ab2d43f0
75 lines
1.9 KiB
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75 lines
1.9 KiB
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Using diskimage-builder to build opendev-ci nodes
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====================================================
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In addition to being able to just download and consume images that are the
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same as what run devstack, it's easy to make your own for local dev or
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testing - or just for fun.
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Install diskimage-builder
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-------------------------
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Install the dependencies:
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::
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sudo apt-get install kpartx qemu-utils curl python-yaml debootstrap
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Install diskimage-builder:
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::
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sudo -H pip install diskimage-builder
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Build an image
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--------------
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Building an image is simple, we have a script!
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::
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bash tools/build-image.sh
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See the script for environment variables to set distribution, etc. By default
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it builds an ubuntu-minimal based image. You should be left with a .qcow2
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image file of your selected distribution.
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Infra uses the -minimal build type for building Ubuntu/CentOS/Fedora. For
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example: ubuntu-minimal.
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It is a good idea to set ``TMP_DIR`` to somewhere with plenty of space
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to avoid the disappointment of a full-disk mid-way through the script
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run.
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While testing, consider exporting DIB_OFFLINE=true, to skip updating the cache.
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Mounting the image
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------------------
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If you would like to examine the contents of the image, you can mount it on
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a loopback device using qemu-nbd.
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::
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sudo apt-get install qemu-utils
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sudo modprobe nbd max_part=16
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sudo mkdir -p /tmp/newimage
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sudo qemu-nbd -c /dev/nbd1 /path/to/opendev-ci-node-precise.qcow2
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sudo mount /dev/nbd1p1 /tmp/newimage
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or use the scripts
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::
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sudo apt-get install qemu-utils
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sudo modprobe nbd max_part=16
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sudo tools/mount-image.sh opendev-ci-node-precise.qcow2
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sudo tools/umount-image.sh
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Other things
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------------
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It's a qcow2 image, so you can do tons of things with it. You can upload it
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to glance, you can boot it using kvm, and you can even copy it to a cloud
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server, replace the contents of the server with it and kexec the new kernel.
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