mirror of
https://github.com/systemd/systemd.git
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167 lines
7.2 KiB
XML
167 lines
7.2 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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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/4.5/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="systemd-network-generator.service" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-network-generator.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-network-generator.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-network-generator.service</refname>
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<refname>systemd-network-generator</refname>
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<refpurpose>Generate network configuration from the kernel command line</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-network-generator.service</filename></para>
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<para><filename>/usr/lib/systemd/systemd-network-generator</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><filename>systemd-network-generator.service</filename> is a system service that translates
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<varname>ip=</varname> and related settings on the kernel command line (see below) into
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<citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>, and
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<citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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configuration files understood by
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<citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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and
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<citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
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</para>
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<para>Files are generated in <filename>/run/systemd/network/</filename>.</para>
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<para>Note: despite the name, this generator executes as a normal systemd service and is
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<emphasis>not</emphasis> an implementation of the
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<citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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concept.</para>
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</refsect1>
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<refsect1>
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<title>Kernel command line options</title>
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<para>This tool understands the following options:</para>
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<variablelist class='kernel-commandline-options'>
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<varlistentry>
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<term><varname>ip=</varname></term>
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<term><varname>nameserver=</varname></term>
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<term><varname>rd.route=</varname></term>
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<term><varname>rd.peerdns=</varname></term>
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<listitem>
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<para>Translated into
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<citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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files.</para>
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<para>In addition to the parameters <citerefentry
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project='man-pages'><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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defines the <varname>ip=</varname> option accepts the special value
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<literal>link-local</literal>. If selected, the network interfaces will be configured for
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link-local addressing (IPv4LL, IPv6LL) only, DHCP or IPv6RA will not be enabled.</para>
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<xi:include href="version-info.xml" xpointer="v245"/>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ifname=</varname></term>
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<term><varname>net.ifname_policy=</varname></term>
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<listitem>
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<para>Translated into
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<citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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files.</para>
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<xi:include href="version-info.xml" xpointer="v245"/>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>vlan=</varname></term>
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<term><varname>bond=</varname></term>
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<term><varname>bridge=</varname></term>
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<term><varname>bootdev=</varname></term>
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<listitem>
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<para>Translated into
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<citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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files.</para>
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<xi:include href="version-info.xml" xpointer="v245"/>
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</listitem>
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</varlistentry>
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<!-- unsupported:
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team=<teammaster>:<teamslaves>
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bootdev=
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BOOTIF=
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bootdev=
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bootdev=
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bootdev=
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-->
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</variablelist>
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<para>See
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<citerefentry project='man-pages'><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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and
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<citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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for option syntax and details.</para>
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</refsect1>
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<refsect1>
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<title>Credentials</title>
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<para><command>systemd-network-generator</command> supports the service credentials logic as implemented
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by
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<varname>ImportCredential=</varname>/<varname>LoadCredential=</varname>/<varname>SetCredential=</varname>
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(see <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
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details). The following credentials are used when passed in:</para>
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<variablelist class='system-credentials'>
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<varlistentry>
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<term><varname>network.conf.*</varname></term>
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<term><varname>network.link.*</varname></term>
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<term><varname>network.netdev.*</varname></term>
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<term><varname>network.network.*</varname></term>
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<listitem><para>These credentials should contain valid
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<citerefentry><refentrytitle>networkd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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configuration data. From each matching credential a separate file is created. Example: a passed
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credential <filename>network.link.50-foobar</filename> will be copied into a configuration file
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<filename>50-foobar.link</filename>.</para>
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<para>Note that the resulting files are created world-readable, it's hence recommended to not include
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secrets in these credentials, but supply them via separate credentials directly to
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<filename>systemd-networkd.service</filename>.</para>
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<xi:include href="version-info.xml" xpointer="v256"/></listitem>
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</varlistentry>
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</variablelist>
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<para>Note that by default the <filename>systemd-network-generator.service</filename> unit file is set up
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to inherit the these credentials from the service manager.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para><simplelist type="inline">
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<member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
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<member><citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
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<member><citerefentry project='man-pages'><refentrytitle>dracut</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
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</simplelist></para>
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</refsect1>
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</refentry>
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