magnum/magnum/drivers/common/image/fedora-atomic/README.rst

fedora-atomic

Generates a Fedora Atomic image based on a public deployed tree. This element has been tested under Debian, Ubuntu, CentOS and Fedora operating systems.

Pre-requisites to run diskimage-builder

For diskimage-builder to work, following packages need to be present:

• python-dev
• build-essential
• python-pip
• kpartx
• python-lzma
• qemu-utils
• yum
• yum-utils
• python-yaml

For Debian/Ubuntu systems, use:

apt-get install python-dev build-essential python-pip kpartx python-lzma \
                qemu-utils yum yum-utils python-yaml git curl

For CentOS and Fedora < 22, use:

yum install python-dev build-essential python-pip kpartx python-lzma qemu-utils yum yum-utils python-yaml

For Fedora >= 22, use:

dnf install python-devel @development-tools python-pip kpartx python-backports-lzma @virtualization yum yum-utils python-yaml

How to generate Fedora Atomic image

To generate an atomic image for Fedora 24 these commands can be executed:

# Install diskimage-builder in virtual environment
virtualenv .
. bin/activate
pip install diskimage-builder
git clone https://git.openstack.org/openstack/magnum
git clone https://git.openstack.org/openstack/dib-utils.git

export PATH="${PWD}/dib-utils/bin:$PATH"

export ELEMENTS_PATH=$(python -c 'import os, diskimage_builder, pkg_resources;print(os.path.abspath(pkg_resources.resource_filename(diskimage_builder.__name__, "elements")))')
export ELEMENTS_PATH="${ELEMENTS_PATH}:${PWD}/magnum/magnum/drivers/common/image"

export DIB_RELEASE=24     # this can be switched to the desired version
export DIB_IMAGE_SIZE=2.5 # we need to give a bit more space to loopback device

disk-image-create fedora-atomic -o fedora-atomic

This element can consume already published trees, but you can use it to consume your own generated trees. Documentation about creating own trees can be found at http://developers.redhat.com/blog/2015/01/08/creating-custom-atomic-trees-images-and-installers-part-1/

Environment Variables

To properly reference the tree, the following env vars can be set:

FEDORA_ATOMIC_TREE_URL

Required

Yes

Description

Url for the public fedora-atomic tree to use. It can reference to own published trees.

Default

https://kojipkgs.fedoraproject.org/atomic/24/

FEDORA_ATOMIC_TREE_REF

Required

Yes

Description

Reference of the tree to install.

Default

d9c8b8a31238e857f010c6fdc282f5f611d3c8af3e78caa891f7edb85822771b

You can use the defaults or export your url and reference, like following:

export FEDORA_ATOMIC_TREE_URL="https://kojipkgs.fedoraproject.org/atomic/24/"
export FEDORA_ATOMIC_TREE_REF="$(curl https://kojipkgs.fedoraproject.org/atomic/24/refs/heads/fedora-atomic/f24/x86_64/docker-host)"