commit 1a1245a2d85e0997ec09817faba562cc39c17e6b5aa38c193dade1de75ada32a Author: Ignaz Forster Date: Wed Jul 22 08:08:29 2020 +0000 Accepting request 822128 from home:favogt:combustion 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 diff --git a/.gitattributes b/.gitattributes new file mode 100644 index 0000000..9b03811 --- /dev/null +++ b/.gitattributes @@ -0,0 +1,23 @@ +## 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 diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..57affb6 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +.osc diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..122a28c --- /dev/null +++ b/LICENSE @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/README b/README new file mode 100644 index 0000000..0decccc --- /dev/null +++ b/README @@ -0,0 +1,65 @@ +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 </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. diff --git a/combustion b/combustion new file mode 100644 index 0000000..0972781 --- /dev/null +++ b/combustion @@ -0,0 +1,94 @@ +#!/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" $2) }' /sysroot/etc/fstab +chroot /sysroot mount -a || true +# t-u needs writable /var/run and /tmp +findmnt /sysroot/run >/dev/null || mount -t tmpfs tmpfs /sysroot/run +findmnt /sysroot/tmp >/dev/null || mount -t tmpfs tmpfs /sysroot/tmp + +# Fake a netconfig setup +if [ -r /etc/resolv.conf ]; then + mkdir -p /sysroot/run/netconfig/ + cp /etc/resolv.conf /sysroot/run/netconfig/resolv.conf + + if ! [ -e /sysroot/etc/resolv.conf ]; then + if ln -sf /run/netconfig/resolv.conf /sysroot/etc/resolv.conf; then + delete_resolv_conf=1 + fi + fi +fi + +# t-u doesn't allow running arbitrary commands and +# also ignores the shell's exit code, so DIY. +if ! chroot /sysroot transactional-update shell < "${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 diff --git a/combustion.changes b/combustion.changes new file mode 100644 index 0000000..2a6da21 --- /dev/null +++ b/combustion.changes @@ -0,0 +1,26 @@ +------------------------------------------------------------------- +Fri Jul 17 12:25:25 UTC 2020 - Fabian Vogt + +- Adjust README after removal of combustion-generator +- Switch to GPL-2.0-only + +------------------------------------------------------------------- +Thu Jul 9 10:29:44 UTC 2020 - Fabian Vogt + +- Also force mounting of /tmp +- Fix getting the script's return value + +------------------------------------------------------------------- +Wed Jul 1 10:31:10 UTC 2020 - Fabian Vogt + +- Set the timeout for the config device explicitly, like ignition-dracut + +------------------------------------------------------------------- +Fri Jun 19 11:26:48 UTC 2020 - Fabian Vogt + +- Drop dependency on ignition + +------------------------------------------------------------------- +Thu Jun 18 11:07:54 UTC 2020 - Fabian Vogt + +- Initial commit diff --git a/combustion.service b/combustion.service new file mode 100644 index 0000000..79f856e --- /dev/null +++ b/combustion.service @@ -0,0 +1,28 @@ +[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 diff --git a/combustion.spec b/combustion.spec new file mode 100644 index 0000000..1878dd6 --- /dev/null +++ b/combustion.spec @@ -0,0 +1,69 @@ +# +# 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 diff --git a/module-setup.sh b/module-setup.sh new file mode 100644 index 0000000..bba3a00 --- /dev/null +++ b/module-setup.sh @@ -0,0 +1,17 @@ +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" +}