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<?xml version='1.0'?> <!--*-nxml-*-->
<!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 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.
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="systemd-journal-gatewayd.service">
<refentryinfo>
<title>systemd-journal-gatewayd.service</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-gatewayd.service</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-journal-gatewayd.service</refname>
<refname>systemd-journal-gatewayd.socket</refname>
<refname>systemd-journal-gatewayd</refname>
<refpurpose>HTTP server for journal events</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>systemd-journal-gatewayd.service</filename></para>
<para><filename>systemd-journal-gatewayd.socket</filename></para>
<cmdsynopsis><command>/usr/lib/systemd/systemd-journal-gatewayd</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>systemd-journal-gatewayd</command> serves journal
events over the network. Clients must connect using
HTTP, to port 19531 by default.</para>
<para>The program is started by
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
and expects to receive a single socket. Use
<command>systemctl start systemd-journal-gatewayd.socket</command> to start
the service, and <command>systemctl enable systemd-journal-gatewayd.socket</command>
to have it started on boot.</para>
</refsect1>
<refsect1>
<title>Supported URLs</title>
<para>The following URLs are recognized:</para>
<variablelist>
<varlistentry>
<term><option>/browse</option></term>
<listitem><para>Interactive browsing.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>/entries[?option1&option2=value...]</option></term>
<listitem><para>Retrieval of events in various formats.</para>
<para>The <option>Accept:</option> part of the HTTP header
determines the format. Supported values are described below.
</para>
<para>The <option>Range:</option> part of the HTTP header
determines the range of events returned. Supported values are
described below.
</para>
<para>GET parameters can be used to modify what events are
returned. Supported parameters are described below.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Accept header</title>
<para>
<option>Accept: <format></option>
</para>
<para>Recognized formats:</para>
<variablelist>
<varlistentry>
<term><option>text/plain</option></term>
<listitem><para>The default. Plaintext syslog-like output,
one line per journal entry
(like <command>journalctl --output short</command>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>application/json</option></term>
<listitem><para>Entries are formatted as JSON data structures,
one per line
(like <command>journalctl --output json</command>).
See <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/json">Journal
JSON Format</ulink> for more information.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>application/event-stream</option></term>
<listitem><para>Entries are formatted as JSON data structures,
wrapped in a format suitable for <ulink
url="https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sent_events">
Server-Sent Events</ulink>
(like <command>journalctl --output json-sse</command>).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>application/vnd.fdo.journal</option></term>
<listitem><para>Entries are serialized into a binary (but
mostly text-based) stream suitable for backups and network
transfer
(like <command>journalctl --output export</command>).
See <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal
Export Format</ulink> for more information.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Range header</title>
<para>
<option>Range: entries=<cursor>[[:<num_skip>]:<num_entries>]</option>
</para>
<para>where
<option>cursor</option> is a cursor string,
<option>num_skip</option> is an integer,
<option>num_entries</option> is an unsigned integer.
</para>
<para>Range defaults to all available events.</para>
</refsect1>
<refsect1>
<title>URL GET parameters</title>
<para>Following parameters can be used as part of the URL:</para>
<variablelist>
<varlistentry>
<term><option>follow</option></term>
<listitem><para>wait for new events
(like <command>journalctl --follow</command>, except that
the number of events returned is not limited).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>discrete</option></term>
<listitem><para>Test that the specified cursor refers to an
entry in the journal. Returns just this entry.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>boot</option></term>
<listitem><para>Limit events to the current boot of the system
(like <command>journalctl --this--boot</command>).</para></listitem>
</varlistentry>
<varlistentry>
<term><option><KEY>=<match></option></term>
<listitem><para>Match journal fields. See
<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>Retrieve events from this boot from local journal
in <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal
Export Format</ulink>:
<programlisting>
curl --silent -H'Accept: application/vnd.fdo.journal' \
'http://localhost:19531/entries?boot'
</programlisting>
</para>
<para>Listen for core dumps:
<programlisting>
curl 'http://localhost:19531/entries?follow&MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1'
</programlisting></para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
</para>
</refsect1>
</refentry>
|
