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systemd/units/systemd-journald.service.in

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license: LGPL-2.1+ -> LGPL-2.1-or-later
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# SPDX-License-Identifier: LGPL-2.1-or-later
Add SPDX license headers to unit files
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#
journal: add unit files and shared library glue
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# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
relicense to LGPLv2.1 (with exceptions) We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.
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# 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
journal: add unit files and shared library glue
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# (at your option) any later version.
[Unit]
Description=Journal Service
units: fix man section
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Documentation=man:systemd-journald.service(8) man:journald.conf(5)
journal: add unit files and shared library glue
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DefaultDependencies=no
Requires=systemd-journald.socket
journald: if available pull audit messages from the kernel into journal logs
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After=systemd-journald.socket systemd-journald-dev-log.socket systemd-journald-audit.socket syslog.socket
unit: make sure structured logging is available before we enter the main boot phase
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Before=sysinit.target
journal: add unit files and shared library glue
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unit: make journald stopped on soft-reboot before broadcasting SIGKILL Workaround for #30195.
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# To avoid journald SIGKILLed during soft-reboot and corrupting journals.
# See https://github.com/systemd/systemd/issues/30195
Before=soft-reboot.target
Conflicts=soft-reboot.target
units: add IgnoreOnIsolate=yes to systemd-journald too We already had it on the socket units, so it's possible that systemd-journald.service would be stopped and then restarted when trafic hits the sockets when something logs. Let's not try to stop it. It is supposed to run until the end and be eventually killed in the final killing spree. This might (or not) help with #23287.
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# Mount and swap units need the journal socket units. If they were removed by
# an isolate request the mount and swap units would be removed too, hence let's
# exclude systemd-journald and its sockets from isolate requests.
IgnoreOnIsolate=yes
journal: add unit files and shared library glue
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[Service]
units: deny access to block devices While the need for access to character devices can be tricky to determine for the general case, it's obvious that most of our services have no need to access block devices. For logind and timedated this can be tightened further.
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DeviceAllow=char-* rw
Drop split-usr and unmerged-usr support As previously announced, execute order 66: https://lists.freedesktop.org/archives/systemd-devel/2022-September/048352.html The meson options split-usr, rootlibdir and rootprefix become no-ops that print a warning if they are set to anything other than the default values. We can remove them in a future release.
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ExecStart={{LIBEXECDIR}}/systemd-journald
journald: make sure we retain all stream fds across restarts (#6348) Currently we set 4096 as maximum for number of stream connections that we accept. However maximum number of file descriptors that systemd is willing to accept from us is just 1024. This means we can't retain all stream connections that we accepted. Hence bump the limit of fds in a unit file so that systemd holds open all stream fds while we are restarted. New limit is set to 4224 (4096 + 128).
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FileDescriptorStoreMax=4224
units: set NoNewPrivileges= for all long-running services Previously, setting this option by default was problematic due to SELinux (as this would also prohibit the transition from PID1's label to the service's label). However, this restriction has since been lifted, hence let's start making use of this universally in our services. On SELinux system this change should be synchronized with a policy update that ensures that NNP-ful transitions from init_t to service labels is permitted. An while we are at it: sort the settings in the unit files this touches. This might increase the size of the change in this case, but hopefully should result in stabler patches later on. Fixes: #1219
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IPAddressDeny=any
LockPersonality=yes
units: enable MemoryDenyWriteExecute (#3459) Secure daemons shipped by systemd by enabling MemoryDenyWriteExecute. Closes: #3459
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MemoryDenyWriteExecute=yes
units: set NoNewPrivileges= for all long-running services Previously, setting this option by default was problematic due to SELinux (as this would also prohibit the transition from PID1's label to the service's label). However, this restriction has since been lifted, hence let's start making use of this universally in our services. On SELinux system this change should be synchronized with a policy update that ensures that NNP-ful transitions from init_t to service labels is permitted. An while we are at it: sort the settings in the unit files this touches. This might increase the size of the change in this case, but hopefully should result in stabler patches later on. Fixes: #1219
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NoNewPrivileges=yes
units: sort settings in systemd-journald.service again
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OOMScoreAdjust=-250
units: add ProtectClock=yes Add `ProtectClock=yes` to systemd units. Since it implies certain `DeviceAllow=` rules, make sure that the units have `DeviceAllow=` rules so they are still able to access other devices. Exclude timesyncd and timedated.
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ProtectClock=yes
units: set NoNewPrivileges= for all long-running services Previously, setting this option by default was problematic due to SELinux (as this would also prohibit the transition from PID1's label to the service's label). However, this restriction has since been lifted, hence let's start making use of this universally in our services. On SELinux system this change should be synchronized with a policy update that ensures that NNP-ful transitions from init_t to service labels is permitted. An while we are at it: sort the settings in the unit files this touches. This might increase the size of the change in this case, but hopefully should result in stabler patches later on. Fixes: #1219
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Restart=always
RestartSec=0
units: further lock down our long-running services Let's make this an excercise in dogfooding: let's turn on more security features for all our long-running services. Specifically: - Turn on RestrictRealtime=yes for all of them - Turn on ProtectKernelTunables=yes and ProtectControlGroups=yes for most of them - Turn on RestrictAddressFamilies= for all of them, but different sets of address families for each Also, always order settings in the unit files, that the various sandboxing features are close together. Add a couple of missing, older settings for a numbre of unit files. Note that this change turns off AF_INET/AF_INET6 from udevd, thus effectively turning of networking from udev rule commands. Since this might break stuff (that is already broken I'd argue) this is documented in NEWS.
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RestrictAddressFamilies=AF_UNIX AF_NETLINK
units: set NoNewPrivileges= for all long-running services Previously, setting this option by default was problematic due to SELinux (as this would also prohibit the transition from PID1's label to the service's label). However, this restriction has since been lifted, hence let's start making use of this universally in our services. On SELinux system this change should be synchronized with a policy update that ensures that NNP-ful transitions from init_t to service labels is permitted. An while we are at it: sort the settings in the unit files this touches. This might increase the size of the change in this case, but hopefully should result in stabler patches later on. Fixes: #1219
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RestrictNamespaces=yes
RestrictRealtime=yes
units: turn on RestrictSUIDSGID= in most of our long-running daemons
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RestrictSUIDSGID=yes
units: define RuntimeDirectory= in systemd-journald.service It doesn't get us much, but makes the differences between the templated and non-templated versions a bit smaller.
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RuntimeDirectory=systemd/journal
RuntimeDirectoryPreserve=yes
journal: give the ability to enable/disable systemd-journald-audit.socket Before this patch the only way to prevent journald from reading the audit messages was to mask systemd-journald-audit.socket. However this had main drawback that downstream couldn't ship the socket disabled by default (beside the fact that masking units is not supposed to be the usual way to disable them). Fixes #15777
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# Audit socket is not listed here because this unit can be turned off. However
# the link between the socket and the service units is still created thanks to
# the 'Service=' setting specified in the socket unit.
Sockets=systemd-journald.socket systemd-journald-dev-log.socket
units: set NoNewPrivileges= for all long-running services Previously, setting this option by default was problematic due to SELinux (as this would also prohibit the transition from PID1's label to the service's label). However, this restriction has since been lifted, hence let's start making use of this universally in our services. On SELinux system this change should be synchronized with a policy update that ensures that NNP-ful transitions from init_t to service labels is permitted. An while we are at it: sort the settings in the unit files this touches. This might increase the size of the change in this case, but hopefully should result in stabler patches later on. Fixes: #1219
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StandardOutput=null
units: set SystemCallArchitectures=native on all our long-running services
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SystemCallArchitectures=native
units: set NoNewPrivileges= for all long-running services Previously, setting this option by default was problematic due to SELinux (as this would also prohibit the transition from PID1's label to the service's label). However, this restriction has since been lifted, hence let's start making use of this universally in our services. On SELinux system this change should be synchronized with a policy update that ensures that NNP-ful transitions from init_t to service labels is permitted. An while we are at it: sort the settings in the unit files this touches. This might increase the size of the change in this case, but hopefully should result in stabler patches later on. Fixes: #1219
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SystemCallErrorNumber=EPERM
SystemCallFilter=@system-service
Type=notify
journald-console: Add colors when forwarding to console Let's color output when we're forwarding to the console. To make this work, we inherit TERM from pid 1 and use it to decide whether we should output colors or not.
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PassEnvironment=TERM
meson: use jinja2 for unit templates We don't need two (and half) templating systems anymore, yay! I'm keeping the changes minimal, to make the diff manageable. Some enhancements due to a better templating system might be possible in the future. For handling of '## ' — see the next commit.
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{{SERVICE_WATCHDOG}}
journal: add unit files and shared library glue
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units: document why CAP_SYS_PTRACE is needed by journald
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# In case you're wondering why CAP_SYS_PTRACE is needed, access to
units: typo fix /proc/<pid>/exec → /proc/<pid>/exe Fix a pretty relevant typo introduced in c7faa23235694a1e803ba093cba6d6e0193a093e.
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# /proc/<pid>/exe requires this capability. Thus if this capability is missing
# the _EXE=/OBJECT_EXE= fields will be missing from the journal entries.
units: document why CAP_SYS_PTRACE is needed by journald
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CapabilityBoundingSet=CAP_SYS_ADMIN CAP_DAC_OVERRIDE CAP_SYS_PTRACE CAP_SYSLOG CAP_AUDIT_CONTROL CAP_AUDIT_READ CAP_CHOWN CAP_DAC_READ_SEARCH CAP_FOWNER CAP_SETUID CAP_SETGID CAP_MAC_OVERRIDE
units: bump the RLIMIT_NOFILE soft limit for all services that access the journal This updates the unit files of all our serviecs that deal with journal stuff to use a higher RLIMIT_NOFILE soft limit by default. The new value is the same as used for the new HIGH_RLIMIT_NOFILE we just added. With this we ensure all code that access the journal has higher RLIMIT_NOFILE. The code that runs as daemon via the unit files, the code that is run from the user's command line via C code internal to the relevant tools. In some cases this means we'll redundantly bump the limits as there are tools run both from the command line and as service.
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# If there are many split up journal files we need a lot of fds to access them
# all in parallel.
meson: use jinja2 for unit templates We don't need two (and half) templating systems anymore, yay! I'm keeping the changes minimal, to make the diff manageable. Some enhancements due to a better templating system might be possible in the future. For handling of '## ' — see the next commit.
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LimitNOFILE={{HIGH_RLIMIT_NOFILE}}
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