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-<?xml version='1.0'?> <!--*-nxml-*-->
-<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-
-<!--
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- 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.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
--->
-
-<refentry id="journald.conf">
- <refentryinfo>
- <title>journald.conf</title>
- <productname>systemd</productname>
-
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Lennart</firstname>
- <surname>Poettering</surname>
- <email>lennart@poettering.net</email>
- </author>
- </authorgroup>
- </refentryinfo>
-
- <refmeta>
- <refentrytitle>journald.conf</refentrytitle>
- <manvolnum>5</manvolnum>
- </refmeta>
-
- <refnamediv>
- <refname>journald.conf</refname>
- <refpurpose>Journal service configuration file</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <para><filename>/etc/systemd/journald.conf</filename></para>
- </refsynopsisdiv>
-
- <refsect1>
- <title>Description</title>
-
- <para>This files configures various parameters of the
- systemd journal service
- <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
-
- </refsect1>
-
- <refsect1>
- <title>Options</title>
-
- <para>All options are configured in the
- <literal>[Journal]</literal> section:</para>
-
- <variablelist>
-
- <varlistentry>
- <term><varname>Storage=</varname></term>
-
- <listitem><para>Controls where to
- store journal data. One of
- <literal>volatile</literal>,
- <literal>persistent</literal>,
- <literal>auto</literal> and
- <literal>none</literal>. If
- <literal>volatile</literal> journal
- log data will be stored only in
- memory, i.e. below the
- <filename>/run/log/journal</filename>
- hierarchy (which is created if
- needed). If
- <literal>persistent</literal> data will
- be stored preferably on disk,
- i.e. below the
- <filename>/var/log/journal</filename>
- hierarchy (which is created if
- needed), with a fallback to
- <filename>/run/log/journal</filename>
- (which is created if needed), during
- early boot and if the disk is not
- writable. <literal>auto</literal> is
- similar to
- <literal>persistent</literal> but the
- directory
- <filename>/var/log/journal</filename>
- is not created if needed, so that its
- existence controls where log data
- goes. <literal>none</literal> turns
- off all storage, all log data received
- will be dropped. Forwarding to other
- targets, such as the console, the
- kernel log buffer or a syslog daemon
- will still work however. Defaults to
- <literal>auto</literal>.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>Compress=</varname></term>
-
- <listitem><para>Takes a boolean
- value. If enabled (the default) data
- objects that shall be stored in the
- journal and are larger than a certain
- threshold are compressed with the XZ
- compression algorithm before they are
- written to the file
- system.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>Seal=</varname></term>
-
- <listitem><para>Takes a boolean
- value. If enabled (the default) and a
- sealing key is available (as created
- by
- <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
- <option>--setup-keys</option>
- command), forward secure sealing (FSS) for
- all persistent journal files is
- enabled.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>SplitMode=</varname></term>
-
- <listitem><para>Controls whether to
- split up journal files per user. One
- of <literal>login</literal>,
- <literal>uid</literal> and
- <literal>none</literal>. If
- <literal>login</literal> each logged
- in user will get his own journal
- files, but systemd user IDs will log
- into the system journal. If
- <literal>uid</literal> any user ID
- will get his own journal files
- regardless whether it belongs to a
- system service or refers to a real
- logged in user. If
- <literal>none</literal> journal files
- are not split up per-user and all
- messages are stored in the single
- system journal. Note that splitting
- up journal files per-user is only
- available of journals are stored
- persistently. If journals are stored
- on volatile storage (see above) only a
- single journal file for all user IDs
- is kept. Defaults to
- <literal>login</literal>.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>RateLimitInterval=</varname></term>
- <term><varname>RateLimitBurst=</varname></term>
-
- <listitem><para>Configures the rate
- limiting that is applied to all
- messages generated on the system. If
- in the time interval defined by
- <varname>RateLimitInterval=</varname>
- more messages than specified in
- <varname>RateLimitBurst=</varname> are
- logged by a service all further
- messages within the interval are
- dropped, until the interval is over. A
- message about the number of dropped
- messages is generated. This rate
- limiting is applied per-service, so
- that two services which log do not
- interfere with each other's
- limit. Defaults to 200 messages in
- 10s. The time specification for
- <varname>RateLimitInterval=</varname>
- may be specified in the following
- units: <literal>s</literal>,
- <literal>min</literal>,
- <literal>h</literal>,
- <literal>ms</literal>,
- <literal>us</literal>. To turn off any
- kind of rate limiting, set either
- value to 0.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>SystemMaxUse=</varname></term>
- <term><varname>SystemKeepFree=</varname></term>
- <term><varname>SystemMaxFileSize=</varname></term>
- <term><varname>RuntimeMaxUse=</varname></term>
- <term><varname>RuntimeKeepFree=</varname></term>
- <term><varname>RuntimeMaxFileSize=</varname></term>
-
- <listitem><para>Enforce size limits on
- the journal files stored. The options
- prefixed with
- <literal>System</literal> apply to the
- journal files when stored on a
- persistent file system, more
- specifically
- <filename>/var/log/journal</filename>. The
- options prefixed with
- <literal>Runtime</literal> apply to
- the journal files when stored on a
- volatile in-memory file system, more
- specifically
- <filename>/run/log/journal</filename>. The
- former is used only when
- <filename>/var</filename> is mounted,
- writable and the directory
- <filename>/var/log/journal</filename>
- exists. Otherwise only the latter
- applies. Note that this means that
- during early boot and if the
- administrator disabled persistent
- logging only the latter options apply,
- while the former apply if persistent
- logging is enabled and the system is
- fully booted
- up. <varname>SystemMaxUse=</varname>
- and <varname>RuntimeMaxUse=</varname>
- control how much disk space the
- journal may use up at
- maximum. Defaults to 10% of the size
- of the respective file
- system. <varname>SystemKeepFree=</varname>
- and
- <varname>RuntimeKeepFree=</varname>
- control how much disk space the
- journal shall always leave free for
- other uses if less than the disk space
- configured in
- <varname>SystemMaxUse=</varname> and
- <varname>RuntimeMaxUse=</varname> is
- available. Defaults to 5% of the size
- of the respective file
- system. <varname>SystemMaxFileSize=</varname>
- and
- <varname>RuntimeMaxFileSize=</varname>
- control how large individual journal
- files may grow at maximum. This
- influences the granularity in which
- disk space is made available through
- rotation, i.e. deletion of historic
- data. Defaults to one eighth of the
- values configured with
- <varname>SystemMaxUse=</varname> and
- <varname>RuntimeMaxUse=</varname>, so
- that usually seven rotated journal
- files are kept as history. Specify
- values in bytes or use K, M, G, T, P,
- E as units for the specified
- sizes. Note that size limits are
- enforced synchronously to journal
- files as they are extended, and need
- no explicit rotation step triggered by
- time.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>MaxFileSec=</varname></term>
-
- <listitem><para>The maximum time to
- store entries in a single journal
- file, before rotating to the next
- one. Normally time-based rotation
- should not be required as size-based
- rotation with options such as
- <varname>SystemMaxFileSize=</varname>
- should be sufficient to ensure that
- journal files don't grow without
- bounds. However, to ensure that not
- too much data is lost at once when old
- journal files are deleted it might
- make sense to change this value from
- the default of one month. Set to 0 to
- turn off this feature. This setting
- takes time values which may be
- suffixed with the units year, month,
- week, day, h, m to override the
- default time unit of
- seconds.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>MaxRetentionSec=</varname></term>
-
- <listitem><para>The maximum time to
- store journal entries. This
- controls whether journal files
- containing entries older then the
- specified time span are
- deleted. Normally time-based deletion
- of old journal files should not be
- required as size-based deletion with
- options such as
- <varname>SystemMaxUse=</varname>
- should be sufficient to ensure that
- journal files don't grow without
- bounds. However, to enforce data
- retention policies it might make sense
- to change this value from the
- default of 0 (which turns off this
- feature). This setting also takes
- time values which may be suffixed with
- the units year, month, week, day, h, m
- to override the default time unit of
- seconds. </para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>ForwardToSyslog=</varname></term>
- <term><varname>ForwardToKMsg=</varname></term>
- <term><varname>ForwardToConsole=</varname></term>
-
- <listitem><para>Control whether log
- messages received by the journal
- daemon shall be forwarded to a
- traditional syslog daemon, to the
- kernel log buffer (kmsg), or to the
- system console. These options take
- boolean arguments. If forwarding to
- syslog is enabled but no syslog daemon
- is running the respective option has
- no effect. By default only forwarding
- to syslog is enabled. These settings
- may be overridden at boot time with
- the kernel command line options
- <literal>systemd.journald.forward_to_syslog=</literal>,
- <literal>systemd.journald.forward_to_kmsg=</literal>
- and
- <literal>systemd.journald.forward_to_console=</literal>.
- </para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>MaxLevelStore=</varname></term>
- <term><varname>MaxLevelSyslog=</varname></term>
- <term><varname>MaxLevelKMsg=</varname></term>
- <term><varname>MaxLevelConsole=</varname></term>
-
- <listitem><para>Controls the maximum
- log level of messages that are stored
- on disk, forwarded to syslog, kmsg or
- the console (if that is enabled, see
- above). As argument, takes one of
- <literal>emerg</literal>,
- <literal>alert</literal>,
- <literal>crit</literal>,
- <literal>err</literal>,
- <literal>warning</literal>,
- <literal>notice</literal>,
- <literal>info</literal>,
- <literal>debug</literal> or integer
- values in the range of 0..7 (corresponding
- to the same levels). Messages equal or below
- the log level specified are
- stored/forwarded, messages above are
- dropped. Defaults to
- <literal>debug</literal> for
- <varname>MaxLevelStore=</varname> and
- <varname>MaxLevelSyslog=</varname>, to
- ensure that the all messages are
- written to disk and forwarded to
- syslog. Defaults to
- <literal>notice</literal> for
- <varname>MaxLevelKMsg=</varname> and
- <literal>info</literal> for
- <varname>MaxLevelConsole=</varname>.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><varname>TTYPath=</varname></term>
-
- <listitem><para>Change the console TTY
- to use if
- <varname>ForwardToConsole=yes</varname>
- is used. Defaults to
- <filename>/dev/console</filename>.</para></listitem>
- </varlistentry>
-
- </variablelist>
-
- </refsect1>
-
- <refsect1>
- <title>See Also</title>
- <para>
- <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
- </para>
- </refsect1>
-
-</refentry>