systemd-networkd-wait-online.service, systemd-networkd-wait-online@.service, systemd-networkd-wait-online — Wait for network to come online
systemd-networkd-wait-online.service
systemd-networkd-wait-online@.service
/usr/lib/systemd/systemd-networkd-wait-online
systemd-networkd-wait-online is a
oneshot system service (see systemd.service(5)), 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
systemd-networkd.service(8)
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 "degraded". The threshold
can be configured by --operational-state= option.
The service systemd-networkd-wait-online.service invokes
systemd-networkd-wait-online without any options. Thus, it waits for all managed
interfaces to be configured or failed, and for at least one to be online.
The service systemd-networkd-wait-online@.service takes an interface
name, and invokes systemd-networkd-wait-online with -i and the
specified interface name. Thus, wait for the specified interface to be configured and online. For
example, systemd-networkd-wait-online@eth0.service waits for
eth0 to be configured by systemd-networkd and online.
The following options are understood:
-i INTERFACE[:MIN_OPERSTATE[:MAX_OPERSTATE]], --interface=INTERFACE[:MIN_OPERSTATE[:MAX_OPERSTATE]]¶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 systemd-networkd-wait-online waits
for all specified interfaces to be online. Optionally, required minimum and maximum operational
states can be specified after a colon ":". Please see
networkctl(1)
for possible operational states. If the operational state is not specified here, then
the value from RequiredForOnline= in the corresponding
.network file is used if present, and "degraded" otherwise.
--ignore=INTERFACE¶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.
-o MIN_OPERSTATE[:MAX_OPERSTATE], --operational-state=MIN_OPERSTATE[:MAX_OPERSTATE]¶Takes a minimum operational state and an optional maximum operational state.
Please see networkctl(1)
for possible operational states. If set, the specified value overrides
RequiredForOnline= settings in .network files.
But this does not override operational states specified in --interface= option.
-4, --ipv4¶Waiting for an IPv4 address of each network interface to be configured. If this
option is specified with --any, then
systemd-networkd-wait-online exits with success when at least one interface
becomes online and has an IPv4 address. If the required minimum operational state is
below "routable", then each link (or at least one link with
--any) must have an IPv4 link-local or routable address. If the required
minimum operational state is "routable", then each link must have an IPv4
routable address.
If neither --ipv4 nor
--ipv6 is specified, then the value from
RequiredFamilyForOnline= in the corresponding .network
file is used if present.
-6, --ipv6¶Waiting for an IPv6 address of each network interface to be configured. If this
option is specified with --any, then
systemd-networkd-wait-online exits with success when at least one interface
becomes online and has an IPv6 address. If the required minimum operational state is
below "routable", then each link (or at least one link with
--any) must have an IPv6 link-local or routable address. If the required
minimum operational state is "routable", then each link must have an IPv6
routable address.
If neither --ipv4 nor
--ipv6 is specified, then the value from
RequiredFamilyForOnline= in the corresponding .network
file is used if present.
--any¶Even if several interfaces are in configuring state,
systemd-networkd-wait-online exits with success when at least one interface
becomes online. When this option is specified with --interface=, then
systemd-networkd-wait-online waits for one of the specified interfaces to be
online. This option is useful when some interfaces may not have carrier on boot.
--timeout=SECS¶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.
-q, --quiet¶Suppress log messages.
-h, --help¶--version¶