1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
|
<?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-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>
|
