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5430f7f2bc
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.
256 lines
13 KiB
XML
256 lines
13 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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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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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="journald.conf">
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<refentryinfo>
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<title>journald.conf</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>journald.conf</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>journald.conf</refname>
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<refpurpose>Journal service configuration file</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>journald.conf</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>This files configures various parameters of the systemd journal service.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>All options are configured in the
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<literal>[Journal]</literal> section:</para>
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<variablelist>
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<varlistentry>
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<term><varname>Compress=</varname></term>
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<listitem><para>Takes a boolean
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value. If enabled (the default) data
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objects that shall be stored in the
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journal and are larger than a certain
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threshold are compressed with the XZ
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compression algorithm before they are
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written to the file
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system.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>RateLimitInterval=</varname></term>
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<term><varname>RateLimitBurst=</varname></term>
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<listitem><para>Configures the rate
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limiting that is applied to all
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messages generated on the system. If
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in the time interval defined by
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<varname>RateLimitInterval=</varname>
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more messages than specified in
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<varname>RateLimitBurst=</varname> are
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logged by a service all further
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messages within the interval are
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dropped, until the interval is over. A
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message about the number of dropped
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messages is generated. This rate
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limiting is applied per-service, so
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that two services which log do not
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interfere with each other's
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limit. Defaults to 100 messages in
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10s. The time specification for
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<varname>RateLimitInterval=</varname>
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may be specified in the following
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units: <literal>s</literal>,
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<literal>min</literal>,
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<literal>h</literal>,
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<literal>ms</literal>,
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<literal>us</literal>. To turn off any
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kind of rate limiting, set either
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value to 0.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>SystemMaxUse=</varname></term>
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<term><varname>SystemKeepFree=</varname></term>
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<term><varname>SystemMaxFileSize=</varname></term>
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<term><varname>SystemMinFileSize=</varname></term>
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<term><varname>RuntimeMaxUse=</varname></term>
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<term><varname>RuntimeKeepFree=</varname></term>
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<term><varname>RuntimeMaxFileSize=</varname></term>
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<term><varname>RuntimeMinFileSize=</varname></term>
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<listitem><para>Enforce size limits on
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the journal files stored. The options
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prefixed with
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<literal>System</literal> apply to the
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journal files when stored on a
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persistant file system, more
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specifically
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<filename>/var/log/journal</filename>. The
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options prefixed with
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<literal>Runtime</literal> apply to
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the journal files when stored on a
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volatile in-memory file system, more
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specifically
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<filename>/run/log/journal</filename>. The
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former is used only when
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<filename>/var</filename> is mounted,
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writable and the directory
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<filename>/var/log/journal</filename>
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exists. Otherwise only the latter
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applies. Note that this means that
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during early boot and if the
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administrator disabled persistant
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logging only the latter options apply,
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while the former apply if persistant
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logging is enabled and the system is
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fully booted
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up. <varname>SystemMaxUse=</varname>
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and <varname>RuntimeMaxUse=</varname>
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control how much disk space the
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journal may use up at
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maximum. Defaults to 10% of the size
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of the respective file
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system. <varname>SystemKeepFree=</varname>
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and
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<varname>RuntimeKeepFree=</varname>
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control how much disk space the
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journal shall always leave free for
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other uses if less than the disk space
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configured in
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<varname>SystemMaxUse=</varname> and
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<varname>RuntimeMaxUse=</varname> is
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available. Defaults to 5% of the size
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of the respective file
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system. <varname>SystemMaxFileSize=</varname>
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and
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<varname>RuntimeMaxFileSize=</varname>
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control how large individual journal
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files may grow at maximum. This
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influences the granularity in which
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disk space is made available through
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rotation, i.e. deletion of historic
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data. Defaults to one eigth of the
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values configured with
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<varname>SystemMaxUse=</varname> and
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<varname>RuntimeMaxUse=</varname>, so
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that usually seven rotated journal
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files are kept as
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history. <varname>SystemMinFileSize=</varname>
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and
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<varname>RuntimeMinFileSize=</varname>
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control how large individual journal
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files grow at minimum. Defaults to
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64K. Specify values in bytes or use
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K, M, G, T, P, E as units for the
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specified sizes. Note that size limits
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are enforced synchronously to journal
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files as they are extended, and need
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no explicit rotation step triggered by
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time.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ForwardToSyslog=</varname></term>
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<term><varname>ForwardToKMsg=</varname></term>
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<term><varname>ForwardToConsole=</varname></term>
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<listitem><para>Control whether log
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messages received by the journal
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daemon shall be forwarded to a
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traditional syslog daemon, to the
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kernel log buffer (kmsg), or to the
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system console. These options take
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boolean arguments. If forwarding to
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syslog is enabled but no syslog daemon
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is running the respective option has
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no effect. By default only forwarding
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to syslog is enabled. These settings
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may be overriden at boot time with the
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kernel command line options
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<literal>systemd_journald.forward_to_syslog=</literal>,
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<literal>systemd_journald.forward_to_kmsg=</literal>
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and
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<literal>systemd_journald.forward_to_console=</literal>. If
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forwarding to the kernel log buffer and
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<varname>ImportKernel=</varname> is
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enabled at the same time care is taken
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to avoid logging loops. It is safe to
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use these options in combination.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ImportKernel=</varname></term>
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<listitem><para>Controls whether
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kernel log messages shall be stored in
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the journal. Takes a boolean argument
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and defaults to enabled. Note that
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currently only one userspace service
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can read kernel messages at a time,
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which means that kernel log message
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reading might get corrupted if it
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is enabled in more than one service,
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for example in both the journal and a
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traditional syslog service.
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</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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