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systemd-stable/units/systemd-journal-flush.service
Franck Bui d5ee050ffc journal: don't remove the flushed flag when journald is stopped
Due to the fact that systemd-journal-flush.service has
"Requires=systemd-journald.service", this service is stopped too when journald
is requested to do so.

However stopping systemd-journal-flush.service implies that journald
relinquishes /var hence implicitly switching back to the volatile storage
mode and removing /run/systemd/journal/flushed.

If journald is started afterwards, it will run in volatile storage mode
regardless of the value of 'Storage=' as it believes now that /var is not yet
ready (because the flushed flag is missing).

Because this flag is mainly an indication for journald that the initialization
of /var/log/journal (during the boot process) has been done,
systemd-journal-flush.service shouldn't be tied to the state of journald itself
but to the state of /var/log/journal, hence to the state of the system.
2021-12-06 11:47:27 +01:00

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# 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=Flush Journal to Persistent Storage
Documentation=man:systemd-journald.service(8) man:journald.conf(5)
DefaultDependencies=no
After=systemd-journald.service systemd-remount-fs.service
Before=systemd-tmpfiles-setup.service
RequiresMountsFor=/var/log/journal
ConditionPathExists=!/etc/initrd-release
[Service]
ExecStart=journalctl --flush
ExecStop=journalctl --smart-relinquish-var
Type=oneshot
RemainAfterExit=yes
TimeoutSec=90s