systemd/units/initrd-switch-root.target

#  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=Switch Root
AssertPathExists=/etc/initrd-release
DefaultDependencies=no
Wants=initrd-switch-root.service
Before=initrd-switch-root.service
AllowIsolate=yes
Wants=initrd-udevadm-cleanup-db.service initrd-root-fs.target initrd-fs.target systemd-journald.service initrd-cleanup.service
After=initrd-udevadm-cleanup-db.service initrd-root-fs.target initrd-fs.target emergency.service emergency.target initrd-cleanup.service
license: LGPL-2.1+ -> LGPL-2.1-or-later 2020-11-09 07:23:58 +03:00			`# SPDX-License-Identifier: LGPL-2.1-or-later`
Add SPDX license headers to unit files 2017-11-18 19:35:03 +03:00			`#`
initrd: add unit files needed for basic systemd-in-initrd support This will: * mount all configured filesystems (typically the rootfs on /sysroot) * reload the configuration to pick up anything from the mounted fs (typically /sysroot/etc/fstab) * mount any newly configured filesystems (typically /usr on /sysroot/usr, if applicable) * shut-down and clean-up any daemons running in the initramfs (typically udevd) * switch-root to /sysroot and start the real init For an example of what files should be included in an initramfs based on this see <https://mailman.archlinux.org/pipermail/arch-projects/2013-February/003628.html>. Cc: Harald Hoyer <harald.hoyer@gmail.com> Cc: Dave Reisner <d@falconindy.com> 2013-02-24 20:40:36 +04:00			`# 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=Switch Root`
units: upgrade initrd check Conditions to Asserts It's a bug if an initrd unit is run on the host. Hence let's upgrade the conditions to asserts. 2020-07-29 17:25:59 +03:00			`AssertPathExists=/etc/initrd-release`
initrd: add unit files needed for basic systemd-in-initrd support This will: * mount all configured filesystems (typically the rootfs on /sysroot) * reload the configuration to pick up anything from the mounted fs (typically /sysroot/etc/fstab) * mount any newly configured filesystems (typically /usr on /sysroot/usr, if applicable) * shut-down and clean-up any daemons running in the initramfs (typically udevd) * switch-root to /sysroot and start the real init For an example of what files should be included in an initramfs based on this see <https://mailman.archlinux.org/pipermail/arch-projects/2013-February/003628.html>. Cc: Harald Hoyer <harald.hoyer@gmail.com> Cc: Dave Reisner <d@falconindy.com> 2013-02-24 20:40:36 +04:00			`DefaultDependencies=no`
units: downgrade Requires= to Wants= Combining Requires= with Before= doesn't really make sense, since this means we are requiring something that runs after us, which logically cannot be fulfilled. Let's hence downgrade Requires= to Wants= so that the ordering is kept but no failure propagation implied. 2020-07-29 17:30:28 +03:00			`Wants=initrd-switch-root.service`
initrd: add unit files needed for basic systemd-in-initrd support This will: * mount all configured filesystems (typically the rootfs on /sysroot) * reload the configuration to pick up anything from the mounted fs (typically /sysroot/etc/fstab) * mount any newly configured filesystems (typically /usr on /sysroot/usr, if applicable) * shut-down and clean-up any daemons running in the initramfs (typically udevd) * switch-root to /sysroot and start the real init For an example of what files should be included in an initramfs based on this see <https://mailman.archlinux.org/pipermail/arch-projects/2013-February/003628.html>. Cc: Harald Hoyer <harald.hoyer@gmail.com> Cc: Dave Reisner <d@falconindy.com> 2013-02-24 20:40:36 +04:00			`Before=initrd-switch-root.service`
			`AllowIsolate=yes`
units: add Wants=initrd-cleanup.service to initrd-switch-root.target (#4345) `systemctl isolate initrd-switch-root.target` called by initrd-cleanup.service kills initrd-cleanup.service itself. Then, initrd-cleanup.service failed and system goes to emergency shell. To prevent this problem, this commit adds `Wants=initrd-cleanup.service` to initrd-switch-root.target. fixes: #4343. 2016-10-11 15:36:14 +03:00			`Wants=initrd-udevadm-cleanup-db.service initrd-root-fs.target initrd-fs.target systemd-journald.service initrd-cleanup.service`
units: make sure initrd-cleanup.service terminates before switching to rootfs A follow-up for commit a8cb1dc3e0fa81aff. Commit a8cb1dc3e0fa81aff made sure that initrd-cleanup.service won't be stopped when initrd-switch-root.target is isolated. However even with this change, it might happen that initrd-cleanup.service survives the switch to rootfs (since it has no ordering constraints against initrd-switch-root.target) and is stopped right after when default.target is isolated. This led to initrd-cleanup.service entering in failed state as it happens when oneshot services are stopped. This patch along with a8cb1dc3e0fa81aff should fix issue #4343. Fixes: #4343 2019-01-28 14:07:37 +03:00			`After=initrd-udevadm-cleanup-db.service initrd-root-fs.target initrd-fs.target emergency.service emergency.target initrd-cleanup.service`