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a375e14519
Closes #28367 (but not really in the exact form, see below) We have the problem of restarting all user manager instances after upgrade. Current approaches involve systemctl kill with SIGRTMIN+25, which is async and feels rather ugly [1][2]; or systemctl --machine=user@ --user, which requires entering each user session. Neither is particularly elegant. Instead, let's just signal daemon-reexec when user@.service is reloaded from system manager. Our long goal of dropping daemon-reload in favor of reexec (see TODO) is unlikely to happen due to user dbus restrictions, but here the synchronization is done via READY=1. [1] https://gitlab.archlinux.org/archlinux/packaging/packages/systemd/-/blob/main/systemd.install?ref_type=heads#L37 [2] https://salsa.debian.org/systemd-team/systemd/-/blob/debian/master/debian/systemd.postinst#L24 #28367 would not really work for us now I come to think about it, because all processes will be reparented to pid1 as soon as original user manager process exits. This alternative approach seems good enough for our use case.
35 lines
1.0 KiB
SYSTEMD
35 lines
1.0 KiB
SYSTEMD
# SPDX-License-Identifier: LGPL-2.1-or-later
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#
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# This file is part of systemd.
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#
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# systemd is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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[Unit]
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Description=User Manager for UID %i
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Documentation=man:user@.service(5)
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BindsTo=user-runtime-dir@%i.service
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After=systemd-logind.service user-runtime-dir@%i.service dbus.service systemd-oomd.service
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IgnoreOnIsolate=yes
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[Service]
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User=%i
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PAMName=systemd-user
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Type=notify-reload
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ExecStart={{LIBEXECDIR}}/systemd --user
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Slice=user-%i.slice
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# Reexecute the manager on service reload, instead of reloading.
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# This provides a synchronous method for restarting all user manager
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# instances after upgrade.
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ReloadSignal=RTMIN+25
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KillMode=mixed
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Delegate=pids memory cpu
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DelegateSubgroup=init.scope
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TasksMax=infinity
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TimeoutStopSec={{ DEFAULT_USER_TIMEOUT_SEC*4//3 }}s
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KeyringMode=inherit
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OOMScoreAdjust=100
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MemoryPressureWatch=skip
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