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>
+ command), forward secure sealing (FSS)
+ for all persistent journal files is
+ enabled. FSS is based on <ulink
+ url="http://eprint.iacr.org/2013/397">Seekable
+ Sequential Key Generators</ulink> by
+ G. A. Marson and B. Poettering and
+ may be used to protect journal files
+ from unnoticed
+ alteration.</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>
limiting is applied per-service, so
that two services which log do not
interfere with each other's
- limit. Defaults to 100 messages in
+ limits. Defaults to 200 messages in
10s. The time specification for
<varname>RateLimitInterval=</varname>
may be specified in the following
<term><varname>SystemMaxUse=</varname></term>
<term><varname>SystemKeepFree=</varname></term>
<term><varname>SystemMaxFileSize=</varname></term>
- <term><varname>SystemMinFileSize=</varname></term>
<term><varname>RuntimeMaxUse=</varname></term>
<term><varname>RuntimeKeepFree=</varname></term>
<term><varname>RuntimeMaxFileSize=</varname></term>
- <term><varname>RuntimeMinFileSize=</varname></term>
<listitem><para>Enforce size limits on
the journal files stored. The options
while the former apply if persistent
logging is enabled and the system is
fully booted
- up. <varname>SystemMaxUse=</varname>
+ up. <command>journalctl</command> and
+ <command>systemd-journald</command>
+ ignore all files with names not ending
+ with <literal>.journal</literal> or
+ <literal>.journal~</literal>, so only
+ such files, located in the appropriate
+ directories, are taken into account
+ when calculating current disk usage.
+ </para>
+
+ <para><varname>SystemMaxUse=</varname>
and <varname>RuntimeMaxUse=</varname>
control how much disk space the
journal may use up at
configured in
<varname>SystemMaxUse=</varname> and
<varname>RuntimeMaxUse=</varname> is
- available. Defaults to 5% of the size
+ available. Defaults to 15% of the size
of the respective file
system. <varname>SystemMaxFileSize=</varname>
and
<varname>SystemMaxUse=</varname> and
<varname>RuntimeMaxUse=</varname>, so
that usually seven rotated journal
- files are kept as
- history. <varname>SystemMinFileSize=</varname>
- and
- <varname>RuntimeMinFileSize=</varname>
- control how large individual journal
- files grow at minimum. Defaults to
- 64K. 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>
+ files are kept as history. Specify
+ values in bytes or use K, M, G, T, P,
+ E as units for the specified sizes
+ (equal to 1024, 1024²,... bytes).
+ Note that size limits are enforced
+ synchronously when journal files
+ are extended, and no explicit
+ rotation step triggered by
+ time is needed.</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>SyncIntervalSec=</varname></term>
+
+ <listitem><para>The timeout before syncing journal
+ data to disk. After syncing journal files have
+ OFFLINE state. Default timeout is 5 minutes.
+ </para></listitem>
</varlistentry>
<varlistentry>
<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>
+ <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>
~ianmdlvl / elogind.git / blobdiff