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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="systemd-networkd-wait-online.service" conditional='ENABLE_NETWORKD'
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>systemd-networkd-wait-online.service</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-networkd-wait-online.service</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-networkd-wait-online.service</refname>
<refname>systemd-networkd-wait-online@.service</refname>
<refname>systemd-networkd-wait-online</refname>
<refpurpose>Wait for network to come online</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>systemd-networkd-wait-online.service</filename></para>
<para><filename>systemd-networkd-wait-online@.service</filename></para>
<para><filename>/usr/lib/systemd/systemd-networkd-wait-online</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>systemd-networkd-wait-online</command> is a
oneshot system service (see <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>), that waits for the network to be
configured. By default, it will wait for all links it is aware of
and which are managed by
<citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
to be fully configured or failed, and for at least one link to be online. Here, online means that
the link's operational state is equal or higher than <literal>degraded</literal>. The threshold
can be configured by <option>--operational-state=</option> option.</para>
<para>The service <filename>systemd-networkd-wait-online.service</filename> invokes
<command>systemd-networkd-wait-online</command> without any options. Thus, it waits for all managed
interfaces to be configured or failed, and for at least one to be online.</para>
<para>The service <filename>systemd-networkd-wait-online@.service</filename> takes an interface
name, and invokes <command>systemd-networkd-wait-online</command> with <option>-i</option> and the
specified interface name. Thus, wait for the specified interface to be configured and online. For
example, <filename>systemd-networkd-wait-online@eth0.service</filename> waits for
<filename>eth0</filename> to be configured by <command>systemd-networkd</command> and online.
</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The following options are understood:</para>
<variablelist>
<varlistentry>
<term><option>-i</option> <replaceable>INTERFACE</replaceable><optional>:<replaceable>MIN_OPERSTATE</replaceable><optional>:<replaceable>MAX_OPERSTATE</replaceable></optional></optional></term>
<term><option>--interface=<replaceable>INTERFACE</replaceable><optional>:<replaceable>MIN_OPERSTATE</replaceable><optional>:<replaceable>MAX_OPERSTATE</replaceable></optional></optional></option></term>
<listitem><para>Network interface to wait for before deciding if the system is online. This
is useful when a system has several interfaces which will be configured, but a particular
one is necessary to access some network resources. When used, all other interfaces are ignored.
This option may be used more than once to wait for multiple network interfaces. When this
option is specified multiple times, then <command>systemd-networkd-wait-online</command> waits
for all specified interfaces to be online. Optionally, required minimum and maximum operational
states can be specified after a colon <literal>:</literal>. Please see
<citerefentry><refentrytitle>networkctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
for possible operational states. If the operational state is not specified here, then
the value from <varname>RequiredForOnline=</varname> in the corresponding
<filename>.network</filename> file is used if present, and <literal>degraded</literal> otherwise.
</para>
<xi:include href="version-info.xml" xpointer="v213"/></listitem>
</varlistentry>
<varlistentry>
<term><option>--ignore=<replaceable>INTERFACE</replaceable></option></term>
<listitem><para>Network interfaces to be ignored when deciding
if the system is online. By default, only the loopback
interface is ignored. This option may be used more than once
to ignore multiple network interfaces. </para>
<xi:include href="version-info.xml" xpointer="v219"/></listitem>
</varlistentry>
<varlistentry>
<term><option>-o</option> <replaceable>MIN_OPERSTATE</replaceable><optional>:<replaceable>MAX_OPERSTATE</replaceable></optional></term>
<term><option>--operational-state=<replaceable>MIN_OPERSTATE</replaceable><optional>:<replaceable>MAX_OPERSTATE</replaceable></optional></option></term>
<listitem><para>Takes a minimum operational state and an optional maximum operational state.
Please see <citerefentry><refentrytitle>networkctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
for possible operational states. If set, the specified value overrides
<varname>RequiredForOnline=</varname> settings in <filename>.network</filename> files.
But this does not override operational states specified in <option>--interface=</option> option.
</para>
<xi:include href="version-info.xml" xpointer="v242"/></listitem>
</varlistentry>
<varlistentry>
<term><option>-4</option></term>
<term><option>--ipv4</option></term>
<listitem><para>Waiting for an IPv4 address of each network interface to be configured. If this
option is specified with <option>--any</option>, then
<command>systemd-networkd-wait-online</command> exits with success when at least one interface
becomes online and has an IPv4 address. If the required minimum operational state is
below <literal>routable</literal>, then each link (or at least one link with
<option>--any</option>) must have an IPv4 link-local or routable address. If the required
minimum operational state is <literal>routable</literal>, then each link must have an IPv4
routable address.</para>
<para>If neither <option>--ipv4</option> nor
<option>--ipv6</option> is specified, then the value from
<varname>RequiredFamilyForOnline=</varname> in the corresponding <filename>.network</filename>
file is used if present.</para>
<xi:include href="version-info.xml" xpointer="v249"/></listitem>
</varlistentry>
<varlistentry>
<term><option>-6</option></term>
<term><option>--ipv6</option></term>
<listitem><para>Waiting for an IPv6 address of each network interface to be configured. If this
option is specified with <option>--any</option>, then
<command>systemd-networkd-wait-online</command> exits with success when at least one interface
becomes online and has an IPv6 address. If the required minimum operational state is
below <literal>routable</literal>, then each link (or at least one link with
<option>--any</option>) must have an IPv6 link-local or routable address. If the required
minimum operational state is <literal>routable</literal>, then each link must have an IPv6
routable address.</para>
<para>If neither <option>--ipv4</option> nor
<option>--ipv6</option> is specified, then the value from
<varname>RequiredFamilyForOnline=</varname> in the corresponding <filename>.network</filename>
file is used if present.</para>
<xi:include href="version-info.xml" xpointer="v249"/></listitem>
</varlistentry>
<varlistentry>
<term><option>--dns</option></term>
<listitem><para>Waiting for DNS servers to be accessible on each interface. If this
option is specified with <option>--any</option>, then
<command>systemd-networkd-wait-online</command> exits with success when at least one interface
becomes online and has an accessible DNS server.</para>
<para>If a link has the property <varname>DefaultRoute=yes</varname> (either because the
<varname>DNSDefaultRoute=</varname> network property is explicitly configured, or
because the link does not have any "routing-only" domains), or if the search domain "." is
configured, then wait for link-specific DNS servers to be accessible. Otherwise, allow global
DNS servers to satisfy the condition.</para>
<xi:include href="version-info.xml" xpointer="v258"/></listitem>
</varlistentry>
<varlistentry>
<term><option>--any</option></term>
<listitem><para>Even if several interfaces are in configuring state,
<command>systemd-networkd-wait-online</command> exits with success when at least one interface
becomes online. When this option is specified with <option>--interface=</option>, then
<command>systemd-networkd-wait-online</command> waits for one of the specified interfaces to be
online. This option is useful when some interfaces may not have carrier on boot.
</para>
<xi:include href="version-info.xml" xpointer="v242"/></listitem>
</varlistentry>
<varlistentry>
<term><option>--timeout=<replaceable>SECS</replaceable></option></term>
<listitem><para>Fail the service if the network is not online
by the time the timeout elapses. A timeout of 0 disables the
timeout. Defaults to 120 seconds. </para>
<xi:include href="version-info.xml" xpointer="v219"/></listitem>
</varlistentry>
<varlistentry>
<term><option>-q</option></term>
<term><option>--quiet</option></term>
<listitem><para>Suppress log messages.</para>
<xi:include href="version-info.xml" xpointer="v242"/></listitem>
</varlistentry>
<xi:include href="standard-options.xml" xpointer="help" />
<xi:include href="standard-options.xml" xpointer="version" />
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para><simplelist type="inline">
<member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>networkctl</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
</simplelist></para>
</refsect1>
</refentry>
|
