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<?xml version='1.0'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="coredump.conf" conditional="ENABLE_COREDUMP"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>coredump.conf</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>coredump.conf</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>coredump.conf</refname>
<refname>coredump.conf.d</refname>
<refpurpose>Core dump storage configuration files</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/etc/systemd/coredump.conf</filename></para>
<para><filename>/etc/systemd/coredump.conf.d/*.conf</filename></para>
<para><filename>/run/systemd/coredump.conf.d/*.conf</filename></para>
<para><filename>/usr/lib/systemd/coredump.conf.d/*.conf</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>These files configure the behavior of
<citerefentry><refentrytitle>systemd-coredump</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
a handler for core dumps invoked by the kernel. Whether <command>systemd-coredump</command> is used
is determined by the kernel's
<varname>kernel.core_pattern</varname> <citerefentry project='man-pages'><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>
setting. See
<citerefentry><refentrytitle>systemd-coredump</refentrytitle><manvolnum>8</manvolnum></citerefentry>
and
<citerefentry project='man-pages'><refentrytitle>core</refentrytitle><manvolnum>5</manvolnum></citerefentry>
pages for the details.</para>
</refsect1>
<xi:include href="standard-conf.xml" xpointer="main-conf" />
<refsect1>
<title>Options</title>
<para>All options are configured in the
[Coredump] section:</para>
<variablelist class='config-directives'>
<varlistentry>
<term><varname>Storage=</varname></term>
<listitem><para>Controls where to store cores. One of <literal>none</literal>,
<literal>external</literal>, and <literal>journal</literal>. When
<literal>none</literal>, the core dumps may be logged (including the backtrace if
possible), but not stored permanently. When <literal>external</literal> (the
default), cores will be stored in <filename>/var/lib/systemd/coredump/</filename>.
When <literal>journal</literal>, cores will be stored in the journal and rotated
following normal journal rotation patterns.</para>
<para>When cores are stored in the journal, they might be
compressed following journal compression settings, see
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
When cores are stored externally, they will be compressed
by default, see below.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Compress=</varname></term>
<listitem><para>Controls compression for external
storage. Takes a boolean argument, which defaults to
<literal>yes</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>ProcessSizeMax=</varname></term>
<listitem><para>The maximum size in bytes of a core which will be processed. Core dumps exceeding
this size may be stored, but the backtrace will not be generated. Like other sizes in this same
config file, the usual suffixes to the base of 1024 are allowed (B, K, M, G, T, P, and E). Defaults
to 1G on 32bit systems, 32G on 64bit systems.</para>
<para>Setting <varname>Storage=none</varname> and <varname>ProcessSizeMax=0</varname>
disables all coredump handling except for a log entry.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>ExternalSizeMax=</varname></term>
<term><varname>JournalSizeMax=</varname></term>
<listitem><para>The maximum (compressed or uncompressed) size in bytes of a core to be saved in
separate files on disk (default: 1G on 32bit, 32G on 64bit systems) or in the journal (default:
10M). Unit suffixes are allowed just as in <option>ProcessSizeMax=</option>.</para></listitem>
<para><varname>ExternalSizeMax=infinity</varname> sets the core size to unlimited.</para>
</varlistentry>
<varlistentry>
<term><varname>MaxUse=</varname></term>
<term><varname>KeepFree=</varname></term>
<listitem><para>Enforce limits on the disk space, specified
in bytes, taken up by externally stored core dumps.
Unit suffixes are allowed just as in <option>ProcessSizeMax=</option>.
<option>MaxUse=</option> makes
sure that old core dumps are removed as soon as the total disk
space taken up by core dumps grows beyond this limit (defaults
to 10% of the total disk size). <option>KeepFree=</option>
controls how much disk space to keep free at least (defaults
to 15% of the total disk size). Note that the disk space used
by core dumps might temporarily exceed these limits while
core dumps are processed. Note that old core dumps are also
removed based on time via
<citerefentry><refentrytitle>systemd-tmpfiles</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
Set either value to 0 to turn off size-based cleanup.</para></listitem>
</varlistentry>
</variablelist>
<para>The defaults for all values are listed as comments in the
template <filename>/etc/systemd/coredump.conf</filename> file that
is installed by default.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>coredumpctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-tmpfiles</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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