systemd/units/systemd-soft-reboot.service

#  SPDX-License-Identifier: LGPL-2.1-or-later
#
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

[Unit]
Description=Reboot System Userspace
Documentation=man:systemd-soft-reboot.service(8)
DefaultDependencies=no
Requires=shutdown.target umount.target final.target
After=shutdown.target umount.target final.target
SuccessAction=soft-reboot-force
pid1: add "soft-reboot" reboot method This adds a new mechanism for rebooting, a form of "userspace reboot" hereby dubbed "soft-reboot". It will stop all services as in a usual shutdown, possibly transition into a new root fs and then issue a fresh initial transaction. The kernel is not replaced. File descriptors can be passed over, thus opening the door for leaving certain resources around between such reboots. Usecase: this is an extremely quick way to reset userspace fully when updating image based systems, without going through a full hardware/firmware/boot loader/kernel/initrd cycle. It minimizes "grayout time" for OS updates. (In particular when combined with kernel live patching) 2023-04-27 17:23:18 +02:00			`# SPDX-License-Identifier: LGPL-2.1-or-later`
			`#`
			`# This file is part of systemd.`
			`#`
			`# systemd is free software; you can redistribute it and/or modify it`
			`# under the terms of the GNU Lesser General Public License as published by`
			`# the Free Software Foundation; either version 2.1 of the License, or`
			`# (at your option) any later version.`

			`[Unit]`
			`Description=Reboot System Userspace`
			`Documentation=man:systemd-soft-reboot.service(8)`
			`DefaultDependencies=no`
Revert "units: do not soft-reboot before soft-reboot.target reached" This reverts commit 4263d7617f0e6ea741e227db223ac6085479165f. Still I think this is the way to go. But the change was merged after -rc2, and still discussion is continued. So, at least now let's revert it, and do that after v256-final is released if approved. 2024-05-22 23:53:13 +09:00			`Requires=shutdown.target umount.target final.target`
			`After=shutdown.target umount.target final.target`
pid1: add "soft-reboot" reboot method This adds a new mechanism for rebooting, a form of "userspace reboot" hereby dubbed "soft-reboot". It will stop all services as in a usual shutdown, possibly transition into a new root fs and then issue a fresh initial transaction. The kernel is not replaced. File descriptors can be passed over, thus opening the door for leaving certain resources around between such reboots. Usecase: this is an extremely quick way to reset userspace fully when updating image based systems, without going through a full hardware/firmware/boot loader/kernel/initrd cycle. It minimizes "grayout time" for OS updates. (In particular when combined with kernel live patching) 2023-04-27 17:23:18 +02:00			`SuccessAction=soft-reboot-force`