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Accepting request 822128 from home:favogt:combustion

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Address comments on the last sr. Not tested yet

OBS-URL: https://build.opensuse.org/request/show/822128
OBS-URL: https://build.opensuse.org/package/show/devel:kubic:ignition/combustion?expand=0&rev=1
This commit is contained in:
Ignaz Forster 2020-07-22 08:08:29 +00:00 committed by Git OBS Bridge
commit 1a1245a2d8
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## Default LFS
*.7z filter=lfs diff=lfs merge=lfs -text
*.bsp filter=lfs diff=lfs merge=lfs -text
*.bz2 filter=lfs diff=lfs merge=lfs -text
*.gem filter=lfs diff=lfs merge=lfs -text
*.gz filter=lfs diff=lfs merge=lfs -text
*.jar filter=lfs diff=lfs merge=lfs -text
*.lz filter=lfs diff=lfs merge=lfs -text
*.lzma filter=lfs diff=lfs merge=lfs -text
*.obscpio filter=lfs diff=lfs merge=lfs -text
*.oxt filter=lfs diff=lfs merge=lfs -text
*.pdf filter=lfs diff=lfs merge=lfs -text
*.png filter=lfs diff=lfs merge=lfs -text
*.rpm filter=lfs diff=lfs merge=lfs -text
*.tbz filter=lfs diff=lfs merge=lfs -text
*.tbz2 filter=lfs diff=lfs merge=lfs -text
*.tgz filter=lfs diff=lfs merge=lfs -text
*.ttf filter=lfs diff=lfs merge=lfs -text
*.txz filter=lfs diff=lfs merge=lfs -text
*.whl filter=lfs diff=lfs merge=lfs -text
*.xz filter=lfs diff=lfs merge=lfs -text
*.zip filter=lfs diff=lfs merge=lfs -text
*.zst filter=lfs diff=lfs merge=lfs -text

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.osc

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Combustion - configure MicroOS on the first boot
================================================
Combustion is a minimal module for dracut, which runs a user provided script on
the first boot of a system.
You can use this to create additional files, install packages, set up devices
or even re-partition the hard disk. The configuration can be provided as a
shell script, loaded from an external storage media and is run during boot in a
new system snapshot. On success, the system will directly boot into that new
snapshot, so that no reboot is needed.
How to use it
-------------
To be compatible and co-installable with ignition
(https://github.com/coreos/ignition), the configuration files are copied from
a filesystem with the LABEL "ignition".
It expects a directory "combustion" at the root level of the filesystem and
a file "script" inside, which is executed inside a transactional-update shell.
Example for formatting a USB drive and adding a config, which installs the
"vim-small" package and creates a /root/welcome file:
```
mkfs.ext4 /dev/sdX
e2label /dev/sdX ignition
mount /dev/sdX /mnt
mkdir -p /mnt/combustion/
cat >/mnt/combustion/script <<EOF
#!/bin/sh
systemctl enable sshd.service
zypper --non-interactive install vim-small
cp welcome /root/welcome
EOF
echo "Hello User!" >/mnt/combustion/welcome
umount /mnt
```
You can do everything necessary for initial system configuration from this
script, including addition of ssh keys, adding users, changing passwords
or even doing partitioning changes.
How it works
------------
The ignition-dracut-grub2 package created a flag file which tells GRUB 2 that
it's the first boot of the system and so GRUB adds "ignition.firstboot" to the
kernel commandline.
If this option is found on the kernel cmdline, combustion.service's
ConditionKernelCommandLine is fulfilled and it'll be required by initrd.target.
It is started after /sysroot is mounted and network is up (if enabled). This
service tries to activate all mountpoints in the system's /etc/fstab and then
calls transactional-update chrooted.
In this transactional-update session the script is started and the exit code
recorded. If the script failed, transactional-update rollback is called and
combustion.service marked as failed.
/sysroot is unmounted and mounted again, so that the default subvolume gets
reevaluated and directly booted into.
The ignition-firstboot-complete service in the final system runs, which deletes
the flag file. This means that combustion is not run on subsequent boots.

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#!/bin/bash
# SPDX-FileCopyrightText: 2020 SUSE LLC
# SPDX-License-Identifier: GPL-2.0-only
set -euo pipefail
config_mount="/mnt/combustion"
# Use /dev/shm for data exchange
exchangedir="/dev/shm/combustion/"
delete_resolv_conf=0
cleanup() {
if findmnt "${config_mount}" >/dev/null; then
umount "${config_mount}" || true
rmdir "${config_mount}" || true
fi
rm -rf "${exchangedir}" || true
if [ "${delete_resolv_conf}" -eq 1 ]; then
rm -f /sysroot/etc/resolv.conf || true
fi
# umount and remount so that the new default subvol is used
umount -R /sysroot
systemctl start sysroot.mount
}
trap cleanup EXIT
# Mount config drive
mkdir -p "${config_mount}"
if ! mount -o ro /dev/disk/by-label/ignition "${config_mount}"; then
echo "Failed to mount config drive!"
exit 1
fi
if ! [ -d "${config_mount}/combustion" ]; then
echo "No config found - doing nothing."
exit 0
fi
# Copy config
mkdir "${exchangedir}"
config_dir="${exchangedir}/config"
cp -R "${config_mount}/combustion" "${config_dir}"
if ! [ -e "${config_dir}/script" ]; then
echo "No config script found."
exit 1
fi
# Prepare chroot
for i in proc sys dev; do
mount --rbind /$i /sysroot/$i
done
mount --make-rslave /sysroot
# Mount everything we can, errors deliberately ignored
# Have to take care of x-initrd.mount first and from the outside
awk '$4 ~ /x-initrd.mount/ { system("findmnt /sysroot" $2 " >/dev/null || mount -t " $3 " -o " $4 " " $1 " /sysroot" $2) }' /sysroot/etc/fstab
chroot /sysroot mount -a || true
# t-u needs writable /var/run and /tmp
findmnt /sysroot/run >/dev/null || mount -t tmpfs tmpfs /sysroot/run
findmnt /sysroot/tmp >/dev/null || mount -t tmpfs tmpfs /sysroot/tmp
# Fake a netconfig setup
if [ -r /etc/resolv.conf ]; then
mkdir -p /sysroot/run/netconfig/
cp /etc/resolv.conf /sysroot/run/netconfig/resolv.conf
if ! [ -e /sysroot/etc/resolv.conf ]; then
if ln -sf /run/netconfig/resolv.conf /sysroot/etc/resolv.conf; then
delete_resolv_conf=1
fi
fi
fi
# t-u doesn't allow running arbitrary commands and
# also ignores the shell's exit code, so DIY.
if ! chroot /sysroot transactional-update shell <<EOF; then
cd "${config_dir}"
chmod a+x script
./script
echo \$? > "${exchangedir}/retval"
EOF
echo "transactional-update failed"
exit 1
fi
if [ "$(cat "${exchangedir}/retval")" -ne 0 ]; then
echo "Command failed, rolling back"
chroot /sysroot transactional-update --no-selfupdate rollback
exit 1
fi

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-------------------------------------------------------------------
Fri Jul 17 12:25:25 UTC 2020 - Fabian Vogt <fvogt@suse.com>
- Adjust README after removal of combustion-generator
- Switch to GPL-2.0-only
-------------------------------------------------------------------
Thu Jul 9 10:29:44 UTC 2020 - Fabian Vogt <fvogt@suse.com>
- Also force mounting of /tmp
- Fix getting the script's return value
-------------------------------------------------------------------
Wed Jul 1 10:31:10 UTC 2020 - Fabian Vogt <fvogt@suse.com>
- Set the timeout for the config device explicitly, like ignition-dracut
-------------------------------------------------------------------
Fri Jun 19 11:26:48 UTC 2020 - Fabian Vogt <fvogt@suse.com>
- Drop dependency on ignition
-------------------------------------------------------------------
Thu Jun 18 11:07:54 UTC 2020 - Fabian Vogt <fvogt@suse.com>
- Initial commit

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[Unit]
Description=Combustion
DefaultDependencies=false
ConditionKernelCommandLine=ignition.firstboot
Requires=sysroot.mount
After=sysroot.mount
# Optionally make network available
After=network.target
# Config drive has to be available
Requires=dev-disk-by\x2dlabel-ignition.device
After=dev-disk-by\x2dlabel-ignition.device
# After ignition completed its stuff
After=ignition-complete.target
# So that /etc/fstab's x-initrd.mount entries are read (again) later
Before=initrd-parse-etc.service
Conflicts=initrd-switch-root.target umount.target
Conflicts=dracut-emergency.service emergency.service emergency.target
[Service]
Type=oneshot
ExecStart=/usr/bin/combustion

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#
# spec file for package combustion
#
# Copyright (c) 2020 SUSE LLC
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
# upon. The license for this file, and modifications and additions to the
# file, is the same license as for the pristine package itself (unless the
# license for the pristine package is not an Open Source License, in which
# case the license is the MIT License). An "Open Source License" is a
# license that conforms to the Open Source Definition (Version 1.9)
# published by the Open Source Initiative.
# Please submit bugfixes or comments via https://bugs.opensuse.org/
#
Name: combustion
Version: 0.1
Release: 0
Summary: System for initial configuration of appliances
License: GPL-2.0-only
Group: System/Management
URL: https://build.opensuse.org/package/show/home:Vogtinator:combustion/combustion
Source1: LICENSE
Source2: README
Source3: module-setup.sh
Source4: combustion.service
Source5: combustion
Requires: ignition-dracut-grub2
BuildArch: noarch
%description
Combustion is a minimal module for dracut, which runs a user provided script on
the first boot of a transactional system.
You can use this to create additional files, install packages, set up devices
or even re-partition the hard disk. The configuration can be provided as a
shell script, loaded from an external storage media and is run during boot in a
new system snapshot. On success, the system will directly boot into that new
snapshot, so that no reboot is needed.
%prep
cp %{SOURCE1} %{SOURCE2} .
%build
%install
mkdir -p %{buildroot}%{_prefix}/lib/dracut/modules.d/35combustion
cd %{buildroot}%{_prefix}/lib/dracut/modules.d/35combustion/
install -m0644 %{SOURCE3} module-setup.sh
install -m0644 %{SOURCE4} combustion.service
install -m0755 %{SOURCE5} combustion
%post
%{?regenerate_initrd_post}
%posttrans
%{?regenerate_initrd_posttrans}
%files
%license LICENSE
%doc README
%dir %{_prefix}/lib/dracut/
%dir %{_prefix}/lib/dracut/modules.d/
%{_prefix}/lib/dracut/modules.d/35combustion/
%changelog

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depends() {
echo bash network systemd url-lib
}
install() {
inst_simple "${moddir}/combustion.service" "${systemdsystemunitdir}/combustion.service"
mkdir -p "${initdir}/${systemdsystemunitdir}/initrd.target.requires/"
ln_r "../combustion.service" "${systemdsystemunitdir}/initrd.target.requires/combustion.service"
inst_multiple awk chroot findmnt
inst_simple "${moddir}/combustion" "/usr/bin/combustion"
# Wait up to 10s (30s on aarch64) for the config drive
devtimeout=10
[ "$(uname -m)" = "aarch64" ] && devtimeout=30
mkdir -p "${initdir}/${systemdsystemunitdir}/dev-disk-by\x2dlabel-ignition.device.d/"
echo -e "[Unit]\nJobTimeoutSec=${devtimeout}" > "${initdir}/${systemdsystemunitdir}/dev-disk-by\x2dlabel-ignition.device.d/timeout.conf"
}