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| Copyright 2012 Zbigniew Jędrzejewski-Szmek |
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| |
| <refentry id="systemd-journal-gatewayd.service" conditional='HAVE_MICROHTTPD' |
| xmlns:xi="http://www.w3.org/2001/XInclude"> |
| |
| <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> |
| <arg choice="opt" rep="repeat">OPTIONS</arg> |
| </cmdsynopsis> |
| </refsynopsisdiv> |
| |
| <refsect1> |
| <title>Description</title> |
| |
| <para><command>systemd-journal-gatewayd</command> serves journal |
| events over the network. Clients must connect using |
| HTTP. The server listens on port 19531 by default. |
| If <option>--cert=</option> is specified, the server expects |
| HTTPS connections.</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>Options</title> |
| |
| <para>The following options are understood:</para> |
| |
| <variablelist> |
| <varlistentry> |
| <term><option>--cert=</option></term> |
| |
| <listitem><para>Specify the path to a file containing a server |
| certificate in PEM format. This option switches |
| <command>systemd-journal-gatewayd</command> into HTTPS mode |
| and must be used together with |
| <option>--key=</option>.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--key=</option></term> |
| |
| <listitem><para>Specify the path to a file containing a server |
| key in PEM format corresponding to the certificate specified |
| with <option>--cert=</option>.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>-D <replaceable>DIR</replaceable></option></term> |
| <term><option>--directory=<replaceable>DIR</replaceable></option></term> |
| |
| <listitem><para>Takes a directory path as argument. If |
| specified, <command>systemd-journal-gatewayd</command> will serve the |
| specified journal directory <replaceable>DIR</replaceable> instead of |
| the default runtime and system journal paths.</para></listitem> |
| </varlistentry> |
| |
| <xi:include href="standard-options.xml" xpointer="help" /> |
| <xi:include href="standard-options.xml" xpointer="version" /> |
| </variablelist> |
| </refsect1> |
| |
| <refsect1> |
| <title>Supported URLs</title> |
| |
| <para>The following URLs are recognized:</para> |
| |
| <variablelist> |
| <varlistentry> |
| <term><uri>/browse</uri></term> |
| |
| <listitem><para>Interactive browsing.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><uri>/entries[?option1&option2=value...]</uri></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> |
| |
| <varlistentry> |
| <term><uri>/machine</uri></term> |
| |
| <listitem><para>Return a JSON structure describing the machine.</para> |
| |
| <para>Example: |
| <programlisting>{ "machine_id" : "8cf7ed9d451ea194b77a9f118f3dc446", |
| "boot_id" : "3d3c9efaf556496a9b04259ee35df7f7", |
| "hostname" : "fedora", |
| "os_pretty_name" : "Fedora 19 (Rawhide)", |
| "virtualization" : "kvm", |
| ...}</programlisting> |
| </para> |
| </listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><uri>/fields/<replaceable>FIELD_NAME</replaceable></uri></term> |
| |
| <listitem><para>Return a list of values of this field present in the logs.</para> |
| </listitem> |
| </varlistentry> |
| </variablelist> |
| </refsect1> |
| |
| <refsect1> |
| <title>Accept header</title> |
| |
| <para> |
| <option>Accept: <replaceable>format</replaceable></option> |
| </para> |
| |
| <para>Recognized formats:</para> |
| |
| <variablelist> |
| <varlistentry> |
| <term><constant>text/plain</constant></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><constant>application/json</constant></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><constant>text/event-stream</constant></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><constant>application/vnd.fdo.journal</constant></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=<replaceable>cursor</replaceable>[[:<replaceable>num_skip</replaceable>]:<replaceable>num_entries</replaceable>]</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><uri>follow</uri></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><uri>discrete</uri></term> |
| |
| <listitem><para>Test that the specified cursor refers to an |
| entry in the journal. Returns just this entry.</para> |
| </listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><uri>boot</uri></term> |
| |
| <listitem><para>Limit events to the current boot of the system |
| (like <command>journalctl --this-boot</command>).</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><uri><replaceable>KEY</replaceable>=<replaceable>match</replaceable></uri></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> |