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https://github.com/systemd/systemd.git
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49f16281c9
Let's use the new flag wherever we read key material/passphrases/hashes off disk, so that people can plug in their own IPC service as backend if they like, easily. (My main goal was actually to support this for crypttab key files — i.e. that you can specify AF_UNIX sockets as third column in crypttab — but that's harder to implement, since the keys are read via libcryptsetup's API, not ours.)
347 lines
15 KiB
XML
347 lines
15 KiB
XML
<?xml version='1.0'?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
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<!ENTITY % entities SYSTEM "custom-entities.ent" >
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%entities;
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]>
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<!-- SPDX-License-Identifier: LGPL-2.1+ -->
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<refentry id="systemd-journal-remote" conditional='HAVE_MICROHTTPD'
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-journal-remote.service</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-journal-remote.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-remote.service</refname>
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<refname>systemd-journal-remote.socket</refname>
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<refname>systemd-journal-remote</refname>
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<refpurpose>Receive journal messages over the network</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-journal-remote.service</filename></para>
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<para><filename>systemd-journal-remote.socket</filename></para>
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<cmdsynopsis>
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<command>/usr/lib/systemd/systemd-journal-remote</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="opt" rep="norepeat">-o/--output=<replaceable>DIR</replaceable>|<replaceable>FILE</replaceable></arg>
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<arg choice="opt" rep="repeat">SOURCES</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-remote</command> is a command to receive serialized journal
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events and store them to journal files. Input streams are in the
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<ulink url="https://www.freedesktop.org/wiki/Software/systemd/export">Journal Export Format</ulink>,
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i.e. like the output from <command>journalctl --output=export</command>. For transport over the
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network, this serialized stream is usually carried over an HTTPS connection.</para>
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<para><filename>systemd-journal-remote.service</filename> is a system service that uses
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<command>systemd-journal-remote</command> to listen for connections.
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<filename>systemd-journal-remote.socket</filename> configures the network address that
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<filename>systemd-journal-remote.service</filename> listens on. By default this is port 19532.
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What connections are accepted and how the received data is stored can be configured through the
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<citerefentry><refentrytitle>journal-remote.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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configuration file.</para>
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</refsect1>
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<refsect1>
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<title>Sources</title>
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<para>
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Sources can be either "active"
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(<command>systemd-journal-remote</command> requests and pulls
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the data), or "passive"
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(<command>systemd-journal-remote</command> waits for a
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connection and then receives events pushed by the other side).
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</para>
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<para>
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<command>systemd-journal-remote</command> can read more than one
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event stream at a time. They will be interleaved in the output
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file. In case of "active" connections, each "source" is one
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stream, and in case of "passive" connections, each connection can
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result in a separate stream. Sockets can be configured in
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"accept" mode (i.e. only one connection), or "listen" mode (i.e.
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multiple connections, each resulting in a stream).
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</para>
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<para>
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When there are no more connections, and no more can be created
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(there are no listening sockets), then
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<command>systemd-journal-remote</command> will exit.
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</para>
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<para>Active sources can be specified in the following
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ways:</para>
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<variablelist>
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<varlistentry>
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<term><arg choice="opt" rep="repeat">SOURCES</arg></term>
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<listitem><para>When <option>-</option> is given as a
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positional argument, events will be read from standard input.
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Other positional arguments will be treated as filenames
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to open and read from.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--url=<replaceable>ADDRESS</replaceable></option></term>
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<listitem><para>With the
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<option>--url=<replaceable>ADDRESS</replaceable></option> option,
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events will be retrieved using HTTP from
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<replaceable>ADDRESS</replaceable>. This URL should refer to the
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root of a remote
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<citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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instance, e.g. http://some.host:19531/ or
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https://some.host:19531/.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--getter='<replaceable>PROG</replaceable> <arg choice="opt" rep="repeat">OPTIONS</arg>'</option></term>
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<listitem><para>Program to invoke to retrieve data. The journal
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event stream must be generated on standard output.</para>
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<para>Examples:</para>
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<programlisting>--getter='curl "-HAccept: application/vnd.fdo.journal" https://some.host:19531/'</programlisting>
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<programlisting>--getter='wget --header="Accept: application/vnd.fdo.journal" -O- https://some.host:19531/'</programlisting>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>Passive sources can be specified in the following
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ways:</para>
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<variablelist>
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<varlistentry>
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<term><option>--listen-raw=<replaceable>ADDRESS</replaceable></option></term>
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<listitem><para><replaceable>ADDRESS</replaceable> must be an
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address suitable for <option>ListenStream=</option> (cf.
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<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
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<command>systemd-journal-remote</command> will listen on this
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socket for connections. Each connection is expected to be a
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stream of journal events.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--listen-http=<replaceable>ADDRESS</replaceable></option></term>
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<term><option>--listen-https=<replaceable>ADDRESS</replaceable></option></term>
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<listitem><para><replaceable>ADDRESS</replaceable> must be
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either a negative integer, in which case it will be
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interpreted as the (negated) file descriptor number, or an
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address suitable for <option>ListenStream=</option> (c.f.
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<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
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In the first case, the server listens on port 19532 by default,
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and the matching file descriptor must be inherited through
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<varname>$LISTEN_FDS</varname>/<varname>$LISTEN_PID</varname>.
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In the second case, an HTTP or HTTPS server will be spawned on
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this port, respectively for <option>--listen-http=</option> and
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<option>--listen-https=</option>. Currently, only POST requests
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to <filename>/upload</filename> with <literal>Content-Type:
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application/vnd.fdo.journal</literal> are supported.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>$LISTEN_FDS</varname></term>
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<listitem><para><command>systemd-journal-remote</command>
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supports the
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<varname>$LISTEN_FDS</varname>/<varname>$LISTEN_PID</varname>
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protocol. Open sockets inherited through socket activation
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behave like those opened with <option>--listen-raw=</option>
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described above, unless they are specified as an argument in
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<option>--listen-http=-<replaceable>n</replaceable></option>
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or
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<option>--listen-https=-<replaceable>n</replaceable></option>
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above. In the latter case, an HTTP or HTTPS server will be
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spawned using this descriptor and connections must be made
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over the HTTP protocol.</para>
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</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> Takes a path to a SSL key file in PEM format. Defaults to
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<filename>&CERTIFICATE_ROOT;/private/journal-remote.pem</filename>. This option can be used with
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<option>--listen-https=</option>. If the path refers to an <constant>AF_UNIX</constant> stream socket
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in the file system a connection is made to it and the key read from it.</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> Takes a path to a SSL certificate file in PEM format. Defaults to
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<filename>&CERTIFICATE_ROOT;/certs/journal-remote.pem</filename>. This option can be used with
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<option>--listen-https=</option>. If the path refers to an <constant>AF_UNIX</constant> stream socket
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in the file system a connection is made to it and the certificate read from it.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--trust=</option></term>
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<listitem><para> Takes a path to a SSL CA certificate file in PEM format, or <option>all</option>. If
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<option>all</option> is set, then certificate checking will be disabled. Defaults to
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<filename>&CERTIFICATE_ROOT;/ca/trusted.pem</filename>. This option can be used with
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<option>--listen-https=</option>. If the path refers to an <constant>AF_UNIX</constant> stream socket
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in the file system a connection is made to it and the certificate read from it.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--gnutls-log=</option></term>
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<listitem><para>
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Takes a comma separated list of gnutls logging categories.
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This option can be used with <option>--listen-http=</option> or
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<option>--listen-https=</option>.
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</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>Sinks</title>
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<para>The location of the output journal can be specified
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with <option>-o</option> or <option>--output=</option>.
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</para>
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<variablelist>
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<varlistentry>
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<term><option>--output=<replaceable>FILE</replaceable></option></term>
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<listitem><para>Will write to this journal file. The filename
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must end with <filename>.journal</filename>. The file will be
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created if it does not exist. If necessary (journal file full,
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or corrupted), the file will be renamed following normal
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journald rules and a new journal file will be created in its
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stead.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--output=<replaceable>DIR</replaceable></option></term>
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<listitem><para>Will create journal files underneath directory
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<replaceable>DIR</replaceable>. The directory must exist. If
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necessary (journal files over size, or corrupted), journal
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files will be rotated following normal journald rules. Names
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of files underneath <replaceable>DIR</replaceable> will be
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generated using the rules described below.</para></listitem>
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</varlistentry>
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</variablelist>
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<para>If <option>--output=</option> is not used, the output
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directory <filename>/var/log/journal/remote/</filename> will be
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used. In case the output file is not specified, journal files
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will be created underneath the selected directory. Files will be
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called
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<filename>remote-<replaceable>hostname</replaceable>.journal</filename>,
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where the <replaceable>hostname</replaceable> part is the
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escaped hostname of the source endpoint of the connection, or the
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numerical address if the hostname cannot be determined.</para>
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<para>In the case that "active" sources are given by the positional
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arguments or <option>--getter=</option> option, the output file name
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must always be given explicitly.</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>--split-mode</option></term>
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<listitem><para>One of <constant>none</constant> or
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<constant>host</constant>. For the first, only one output
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journal file is used. For the latter, a separate output file
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is used, based on the hostname of the other endpoint of a
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connection.</para>
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<para>In the case that "active" sources are given by the positional
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arguments or <option>--getter=</option> option, the output file name must
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always be given explicitly and only <constant>none</constant>
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is allowed.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--compress</option> [<replaceable>BOOL</replaceable>]</term>
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<listitem><para>If this is set to <literal>yes</literal> then compress
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the data in the journal using XZ. The default is <literal>yes</literal>.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--seal</option> [<replaceable>BOOL</replaceable>]</term>
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<listitem><para>If this is set to <literal>yes</literal> then
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periodically sign the data in the journal using Forward Secure Sealing.
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The default is <literal>no</literal>.</para></listitem>
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</varlistentry>
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<xi:include href="standard-options.xml" xpointer="help" />
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<xi:include href="standard-options.xml" xpointer="version" />
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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>Copy local journal events to a different journal directory:
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<programlisting>
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journalctl -o export | systemd-journal-remote -o /tmp/dir/foo.journal -
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</programlisting>
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</para>
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<para>Retrieve all available events from a remote
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<citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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instance and store them in
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<filename>/var/log/journal/remote/remote-some.host.journal</filename>:
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<programlisting>
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systemd-journal-remote --url http://some.host:19531/
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</programlisting>
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</para>
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<para>Retrieve current boot events and wait for new events from a remote
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<citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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instance, and store them in
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<filename>/var/log/journal/remote/remote-some.host.journal</filename>:
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<programlisting>
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systemd-journal-remote --url http://some.host:19531/entries?boot&follow
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</programlisting>
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</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>journal-remote.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-journal-gatewayd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-journal-upload.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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