56ba3c78ae
man rules were repeating the same information in too many places, which was error prone. Those rules can be easily generated from .xml files. For efficiency and because python is not a required dependency, Makefile-man.am is only regenerated when requested with make update-man-list If no metadata in man/*.xml changed, this file should not change. So only when a new man page or a new alias is added, this file should show up in 'git diff'. The change should then be committed. If the support for building from git without python was dropped, we could drop Makefile-man.am from version control. This would also increase the partial build time (since more stuff would be rebuild whenever sources in man/*.xml would be modified), so it would probably wouldn't be worth it.
321 lines
10 KiB
XML
321 lines
10 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2012 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="systemd-journal-gatewayd.service" conditional='HAVE_MICROHTTPD'>
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<refentryinfo>
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<title>systemd-journal-gatewayd.service</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Zbigniew</firstname>
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<surname>Jędrzejewski-Szmek</surname>
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<email>zbyszek@in.waw.pl</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-journal-gatewayd.service</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-journal-gatewayd.service</refname>
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<refname>systemd-journal-gatewayd.socket</refname>
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<refname>systemd-journal-gatewayd</refname>
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<refpurpose>HTTP server for journal events</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-journal-gatewayd.service</filename></para>
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<para><filename>systemd-journal-gatewayd.socket</filename></para>
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<cmdsynopsis>
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<command>/usr/lib/systemd/systemd-journal-gatewayd</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>systemd-journal-gatewayd</command> serves journal
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events over the network. Clients must connect using
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HTTP. The server listens on port 19531 by default.
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If <option>--cert=</option> is specified, the server expects
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HTTPS connections.</para>
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<para>The program is started by
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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and expects to receive a single socket. Use
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<command>systemctl start systemd-journal-gatewayd.socket</command> to start
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the service, and <command>systemctl enable systemd-journal-gatewayd.socket</command>
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to have it started on boot.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>The following options are understood:</para>
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<variablelist>
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<varlistentry>
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<term><option>--help</option></term>
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<term><option>-h</option></term>
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<listitem><para>Prints a short help
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text and exits.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--version</option></term>
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<listitem><para>Prints a short version
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string and exits.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--cert=</option></term>
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<listitem><para>Specify the path to a file containing a server
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certificate in PEM format. This option switches
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<command>systemd-journal-gatewayd</command> into HTTPS mode
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and must be used together with
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<option>--key=</option>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--key=</option></term>
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<listitem><para>Specify the path to a file containing a server
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key in PEM format corresponding to the certificate specified
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with <option>--cert=</option>.</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Supported URLs</title>
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<para>The following URLs are recognized:</para>
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<variablelist>
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<varlistentry>
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<term><uri>/browse</uri></term>
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<listitem><para>Interactive browsing.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><uri>/entries[?option1&option2=value...]</uri></term>
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<listitem><para>Retrieval of events in various formats.</para>
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<para>The <option>Accept:</option> part of the HTTP header
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determines the format. Supported values are described below.
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</para>
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<para>The <option>Range:</option> part of the HTTP header
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determines the range of events returned. Supported values are
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described below.
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</para>
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<para>GET parameters can be used to modify what events are
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returned. Supported parameters are described below.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><uri>/machine</uri></term>
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<listitem><para>Return a JSON structure describing the machine.</para>
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<para>Example:
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<programlisting>
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{ "machine_id" : "8cf7ed9d451ea194b77a9f118f3dc446",
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"boot_id" : "3d3c9efaf556496a9b04259ee35df7f7",
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"hostname" : "fedora",
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"os_pretty_name" : "Fedora 19 (Rawhide)",
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"virtualization" : "kvm",
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...}
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</programlisting>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><uri>/fields/<replaceable>FIELD_NAME</replaceable></uri></term>
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<listitem><para>Return a list of values of this field present in the logs.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Accept header</title>
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<para>
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<option>Accept: <replaceable>format</replaceable></option>
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</para>
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<para>Recognized formats:</para>
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<variablelist>
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<varlistentry>
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<term><constant>text/plain</constant></term>
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<listitem><para>The default. Plaintext syslog-like output,
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one line per journal entry
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(like <command>journalctl --output short</command>).</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>application/json</constant></term>
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<listitem><para>Entries are formatted as JSON data structures,
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one per line
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(like <command>journalctl --output json</command>).
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See <ulink
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url="http://www.freedesktop.org/wiki/Software/systemd/json">Journal
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JSON Format</ulink> for more information.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>application/event-stream</constant></term>
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<listitem><para>Entries are formatted as JSON data structures,
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wrapped in a format suitable for <ulink
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url="https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sent_events">
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Server-Sent Events</ulink>
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(like <command>journalctl --output json-sse</command>).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>application/vnd.fdo.journal</constant></term>
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<listitem><para>Entries are serialized into a binary (but
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mostly text-based) stream suitable for backups and network
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transfer
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(like <command>journalctl --output export</command>).
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See <ulink
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url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal
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Export Format</ulink> for more information.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Range header</title>
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<para>
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<option>Range: entries=<replaceable>cursor</replaceable>[[:<replaceable>num_skip</replaceable>]:<replaceable>num_entries</replaceable>]</option>
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</para>
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<para>where
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<option>cursor</option> is a cursor string,
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<option>num_skip</option> is an integer,
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<option>num_entries</option> is an unsigned integer.
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</para>
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<para>Range defaults to all available events.</para>
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</refsect1>
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<refsect1>
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<title>URL GET parameters</title>
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<para>Following parameters can be used as part of the URL:</para>
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<variablelist>
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<varlistentry>
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<term><uri>follow</uri></term>
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<listitem><para>wait for new events
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(like <command>journalctl --follow</command>, except that
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the number of events returned is not limited).</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><uri>discrete</uri></term>
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<listitem><para>Test that the specified cursor refers to an
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entry in the journal. Returns just this entry.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><uri>boot</uri></term>
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<listitem><para>Limit events to the current boot of the system
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(like <command>journalctl --this--boot</command>).</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><uri><replaceable>KEY</replaceable>=<replaceable>match</replaceable></uri></term>
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<listitem><para>Match journal fields. See
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<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Examples</title>
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<para>Retrieve events from this boot from local journal
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in <ulink
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url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal
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Export Format</ulink>:
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<programlisting>
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curl --silent -H'Accept: application/vnd.fdo.journal' \
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'http://localhost:19531/entries?boot'
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</programlisting>
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</para>
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<para>Listen for core dumps:
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<programlisting>
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curl 'http://localhost:19531/entries?follow&MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1'
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</programlisting></para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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</para>
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</refsect1>
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</refentry>
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