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Generate fedora-atomic images using dib

It consumes an external deployed tree, and generates a
cloud bootable image based on that. It relies on lvm element
to generate the volumes needed for the image.

Change-Id: Ie681064d799279519adcc8e1bcf7a61ff9120042
changes/19/296719/8
Yolanda Robla 5 years ago
committed by Hongbin Lu
parent
commit
e2def6f8d3
  1. 67
      magnum/elements/fedora-atomic/README.rst
  2. 4
      magnum/elements/fedora-atomic/element-deps
  3. 2
      magnum/elements/fedora-atomic/environment.d/50-fedora-atomic
  4. 73
      magnum/elements/fedora-atomic/finalise.d/80-fedora-atomic
  5. 2
      magnum/elements/fedora-atomic/package-installs.yaml

67
magnum/elements/fedora-atomic/README.rst

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=============
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
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-dev build-essential python-pip kpartx python-lzma qemu-utils yum yum-utils python-yaml
diskimage-builder can be installed using pip::
pip install diskimage-builder
How to generate Fedora Atomic image
-----------------------------------
To generate an atomic image for Fedora 23 these commands can be
executed::
export ELEMENTS_PATH=/path/to/diskimage-builder/elements:/path/to/magnum/elements
export DIB_RELEASE=23 # this can be switched to the desired version
export DIB_IMAGE_SIZE=2 # we need to give a bit more space to loopback device
disk-image-create 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/ <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://dl.fedoraproject.org/pub/fedora/linux/atomic/23/ <https://dl.fedoraproject.org/pub/fedora/linux/atomic/23/>`_
FEDORA_ATOMIC_TREE_REF
:Required: Yes
:Description: Reference of the tree to install.
:Default: 954bdbeebebfa87b625d9d7bd78c81400bdd6756fcc3205987970af4b64eb678

4
magnum/elements/fedora-atomic/element-deps

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fedora-minimal
growroot
package-installs
vm

2
magnum/elements/fedora-atomic/environment.d/50-fedora-atomic

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export FEDORA_ATOMIC_TREE_URL=${FEDORA_ATOMIC_TREE_URL:-https://dl.fedoraproject.org/pub/fedora/linux/atomic/23/}
export FEDORA_ATOMIC_TREE_REF=${FEDORA_ATOMIC_TREE_REF:-954bdbeebebfa87b625d9d7bd78c81400bdd6756fcc3205987970af4b64eb678}

73
magnum/elements/fedora-atomic/finalise.d/80-fedora-atomic

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#!/bin/bash
if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
# generate ostree in root
cd /
ostree admin os-init fedora-atomic
ostree remote add --set=gpg-verify=false fedora-atomic ${FEDORA_ATOMIC_TREE_URL}
ostree pull fedora-atomic ${FEDORA_ATOMIC_TREE_REF}
ostree remote delete fedora-atomic
ostree admin deploy --os=fedora-atomic ${FEDORA_ATOMIC_TREE_REF} --karg-proc-cmdline --karg=selinux=0
# copy /etc/fstab to the deployed directory
SYSROOT=/ostree/deploy/fedora-atomic/deploy/${FEDORA_ATOMIC_TREE_REF}.0
cp /etc/fstab $SYSROOT/etc/
# need to find the generated images
DEPLOYED_DIRECTORY=$(find /boot/ostree -name fedora-atomic-* -type d)
DEPLOYED_ID=${DEPLOYED_DIRECTORY##*-}
INIT_IMAGE=$(find ${DEPLOYED_DIRECTORY} -name initramfs*.img)
# generate ostree boot
cat > /etc/grub.d/15_ostree <<EOF
cat <<EOL
menuentry 'Fedora 23 (ostree)' --class gnu-linux --class gnu --class os --unrestricted "ostree-0-${DIB_IMAGE_ROOT_FS_UUID}" {
set gfxpayload=text
insmod gzio
insmod part_msdos
insmod ext2
search --no-floppy --set=root --label ${DIB_ROOT_LABEL}
linux16 ${DEPLOYED_DIRECTORY}/vmlinuz root=LABEL=${DIB_ROOT_LABEL} ro nofb nomodeset vga=normal console=tty0 console=ttyS0,115200 no_timer_check rd.shell=0 ostree=/ostree/boot.1/fedora-atomic/${DEPLOYED_ID}/0
initrd16 ${INIT_IMAGE}
}
EOL
EOF
chmod +x /etc/grub.d/15_ostree
# start cloud-init on boot
ln -sf $SYSROOT/usr/lib/systemd/system/cloud-config.service $SYSROOT/etc/systemd/system/multi-user.target.wants/cloud-config.service
ln -sf $SYSROOT/usr/lib/systemd/system/cloud-final.service $SYSROOT/etc/systemd/system/multi-user.target.wants/cloud-final.service
ln -sf $SYSROOT/usr/lib/systemd/system/cloud-init.service $SYSROOT/etc/systemd/system/multi-user.target.wants/cloud-init.service
ln -sf $SYSROOT/usr/lib/systemd/system/cloud-init-local.service $SYSROOT/etc/systemd/system/multi-user.target.wants/cloud-init-local.service
# update docker configuration
cat > $SYSROOT/etc/sysconfig/docker-storage <<EOF
DOCKER_STORAGE_OPTIONS="--storage-opt dm.thinpooldev=/dev/mapper/docker-docker--pool"
EOF
# disabled docker-storage-setup
rm $SYSROOT/etc/systemd/system/multi-user.target.wants/docker-storage-setup.service
# remove previous entry and generate config
rm /etc/grub.d/10_linux
grub2-mkconfig -o /boot/grub2/grub.cfg
# remove non usable images
rm -rf /boot/vmlinuz*
rm -rf /boot/initramfs*
# image cleanup
if [ $DIB_RELEASE -ge 22 ]; then
dnf -y remove dracut grubby kernel initscript man-pages redhat-lsb-core selinux-policy selinux-policy-targeted
dnf autoremove
dnf clean all
else
yum -y remove dracut grubby kernel initscript man-pages redhat-lsb-core selinux-policy selinux-policy-targeted
yum autoremove
yum clean all
fi

2
magnum/elements/fedora-atomic/package-installs.yaml

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# Install packages needed for atomic
ostree:
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