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systemd-stable/man/systemd-journal-remote.xml
Lennart Poettering 3802a3d3d7 man: add emacs header to get correct indention in nxml-mode for the manpage XML files that use 2ch indenting
In the long run we really should figure out if we want to stick with 8ch
or 2ch indenting, and not continue with half-and-half. For now, just
make emacs aware of the files that use 2ch indenting.
2014-11-21 20:44:48 +01:00

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<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
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Copyright 2012 Zbigniew Jędrzejewski-Szmek
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.
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-->
<refentry id="systemd-journal-remote" conditional='HAVE_MICROHTTPD'
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>systemd-journal-remote</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Zbigniew</firstname>
<surname>Jędrzejewski-Szmek</surname>
<email>zbyszek@in.waw.pl</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-journal-remote</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-journal-remote</refname>
<refpurpose>Receive journal messages over the network</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>systemd-journal-remote</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<arg choice="opt" rep="norepeat">-o/--output=<replaceable>DIR</replaceable>|<replaceable>FILE</replaceable></arg>
<arg choice="opt" rep="repeat">SOURCES</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<filename>systemd-journal-remote</filename> is a command to
receive serialized journal events and store them to the journal.
Input streams are in the
<ulink url="http://www.freedesktop.org/wiki/Software/systemd/export">
Journal Export Format
</ulink>,
i.e. like the output from
<command>journalctl --output=export</command>. For transport over
the network, this serialized stream is usually carried over an
HTTPS connection.
</para>
</refsect1>
<refsect1>
<title>Sources</title>
<para>
Sources can be either "active"
(<command>systemd-journal-remote</command> requests and pulls
the data), or "passive"
(<command>systemd-journal-remote</command> waits for a
connection and then receives events pushed by the other side).
</para>
<para>
<command>systemd-journal-remote</command> can read more than one
event stream at a time. They will be interleaved in the output
file. In case of "active" connections, each "source" is one
stream, and in case of "passive" connections, each connection can
result in a separate stream. Sockets can be configured in
"accept" mode (i.e. only one connection), or "listen" mode (i.e.
multiple connections, each resulting in a stream).
</para>
<para>
When there are no more connections, and no more can be created
(there are no listening sockets), then
<command>systemd-journal-remote</command> will exit.
</para>
<para>Active sources can be specified in the following
ways:</para>
<variablelist>
<varlistentry>
<listitem><para>When <option>-</option> is given as a
positional argument, events will be read from standard input.
Other positional arguments will be treated as filenames
to open and read from.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--url=<replaceable>ADDRESS</replaceable></option></term>
<listitem><para>With the
<option>--url=<replaceable>ADDRESS</replaceable></option> option,
events will be retrieved using HTTP from
<replaceable>ADDRESS</replaceable>. This URL should refer to the
root of a remote
<citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
instance (e.g. <ulink>http://some.host:19531/</ulink> or
<ulink>https://some.host:19531/</ulink>).</para></listitem>
</varlistentry>
</variablelist>
<para>Passive sources can be specified in the following
ways:</para>
<variablelist>
<varlistentry>
<term><option>--listen-raw=<replaceable>ADDRESS</replaceable></option></term>
<listitem><para><replaceable>ADDRESS</replaceable> must be an
address suitable for <option>ListenStream=</option> (cf.
<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
<command>systemd-journal-remote</command> will listen on this
socket for connections. Each connection is expected to be a
stream of journal events.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--listen-http=<replaceable>ADDRESS</replaceable></option></term>
<term><option>--listen-https=<replaceable>ADDRESS</replaceable></option></term>
<listitem><para><replaceable>ADDRESS</replaceable> must be
either a negative integer, in which case it will be
interpreted as the (negated) file descriptor number, or an
address suitable for <option>ListenStream=</option> (c.f.
<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
In the first case, matching file descriptor must be inherited
through
<varname>$LISTEN_FDS</varname>/<varname>$LISTEN_PID</varname>.
In the second case, an HTTP or HTTPS server will be spawned on
this port, respectively for <option>--listen-http</option> and
<option>--listen-https</option>. Currenntly, only POST requests
to <filename>/upload</filename> with <literal>Content-Type:
application/vnd.fdo.journal</literal> are supported.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>$LISTEN_FDS</varname></term>
<listitem><para><command>systemd-journal-remote</command>
supports the
<varname>$LISTEN_FDS</varname>/<varname>$LISTEN_PID</varname>
protocol. Open sockets inherited through socket activation
behave like those opened with <option>--listen-raw=</option>
described above, unless they are specified as an argument in
<option>--listen-http=-<replaceable>n</replaceable></option>
or
<option>--listen-https=-<replaceable>n</replaceable></option>
above. In the latter case, an HTTP or HTTPS server will be
spawned using this descriptor and connections must be made
over the HTTP protocol.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Sinks</title>
<para>The location of the output journal can be specified
with <option>-o</option> or <option>--output=</option>. For "active"
sources, this option is required.
</para>
<variablelist>
<varlistentry>
<term><option>--output=<replaceable>FILE</replaceable></option></term>
<listitem><para>Will write to this journal file. The filename
must end with <filename>.journal</filename>. The file will be
created if it does not exist. If necessary (journal file full,
or corrupted), the file will be renamed following normal
journald rules and a new journal file will be created in its
stead.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--output=<replaceable>DIR</replaceable></option></term>
<listitem><para>Will create journal files underneath directory
<replaceable>DIR</replaceable>. The directory must exist. If
necessary (journal files over size, or corrupted), journal
files will be rotated following normal journald rules. Names
of files underneath <replaceable>DIR</replaceable> will be
generated using the rules described below.</para></listitem>
</varlistentry>
</variablelist>
<para>If <option>--output=</option> is not used, the output
directory <filename>/var/log/journal/remote/</filename> will be
used. In case the output file is not specified, journal files
will be created underneath the selected directory. Files will be
called
<filename>remote-<replaceable>hostname</replaceable>.journal</filename>,
where the <replaceable>hostname</replaceable> part is the
escaped hostname of the source endpoint of the connection, or the
numerical address if the hostname cannot be determined.</para>
<para>In case of "active" sources, the output file name must
always be given explicitly.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The following options are understood:</para>
<variablelist>
<varlistentry>
<term><option>--split-mode</option></term>
<listitem><para>One of <constant>none</constant> or
<constant>host</constant>. For the first, only one output
journal file is used. For the latter, a separate output file
is used, based on the hostname of the other endpoint of a
connection.</para>
<para>In case of "active" sources, the output file name must
always be given explicitly and only <constant>none</constant>
is allowed.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--compress</option></term>
<term><option>--no-compress</option></term>
<listitem><para>Compress or not, respectively, the data in the
journal using XZ.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--seal</option></term>
<term><option>--no-seal</option></term>
<listitem><para>Periodically sign or not, respectively, the
data in the journal using Forward Secure Sealing.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--getter=<replaceable>PROG --option1 --option2</replaceable></option></term>
<listitem><para>Program to invoke to retrieve data. The journal
event stream must be generated on standard output.</para>
<para>Examples:</para>
<programlisting>--getter='curl "-HAccept: application/vnd.fdo.journal" https://some.host:19531/'</programlisting>
<programlisting>--getter='wget --header="Accept: application/vnd.fdo.journal" -O- https://some.host:19531/'</programlisting>
</listitem>
</varlistentry>
<xi:include href="standard-options.xml" xpointer="help" />
<xi:include href="standard-options.xml" xpointer="version" />
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>Copy local journal events to a different journal directory:
<programlisting>
journalctl -o export | systemd-journal-remote -o /tmp/dir -
</programlisting>
</para>
<para>Retrieve events from a remote
<citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
instance and store them in
<filename>/var/log/journal/some.host/remote-some~host.journal</filename>:
<programlisting>
systemd-journal-remote --url http://some.host:19531/
</programlisting>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd-journal-upload</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-journal-gatewayd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>