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| author | Tom Gundersen <teg@jklm.no> | 2014-04-23 17:42:55 +0200 |
|---|---|---|
| committer | Tom Gundersen <teg@jklm.no> | 2014-04-24 00:23:07 +0200 |
| commit | 3a67e927e3be7efb8edf314a31aa4f8f5cba4f53 (patch) | |
| tree | 5736719c730b85db89f6be3135290c565a02d046 /units | |
| parent | hostnamectl: read kernel name and release from remote (diff) | |
| download | systemd-3a67e927e3be7efb8edf314a31aa4f8f5cba4f53.tar.xz systemd-3a67e927e3be7efb8edf314a31aa4f8f5cba4f53.zip | |
networkd-wait-online: improve interoptability and enable by default
To make sure we don't delay boot on systems where (some) network links are managed by someone else
we don't block if something else has successfully brought up a link.
We will still block until all links we are aware of that are managed by networkd have been
configured, but if no such links exist, and someone else have configured a link sufficiently
that it has a carrier, it may be that the link is ready so we should no longer block.
Note that in all likelyhood the link is not ready (no addresses/routes configured),
so whatever network managment daemon configured it should provide a similar wait-online
service to block network-online.target until it is ready.
The aim is to block as long as we know networking is not fully configured, but no longer. This
will allow systemd-networkd-wait-online.service to be enabled on any system, even if we don't
know whether networkd is the main/only network manager.
Even in the case networking is fully configured by networkd, the default behavior may not be
sufficient: if two links need to be configured, but the first is fully configured before the
second one appears we will assume the network is up. To work around that, we allow specifying
specific devices to wait for before considering the network up.
This unit is enabled by default, just like systemd-networkd, but will only be pulled in if
anyone pulls in network-online.target.
Diffstat (limited to 'units')
| -rw-r--r-- | units/.gitignore | 1 | ||||
| -rw-r--r-- | units/systemd-networkd-wait-online.service.in | 23 | ||||
| -rw-r--r-- | units/systemd-networkd.service.in | 1 |
3 files changed, 25 insertions, 0 deletions
diff --git a/units/.gitignore b/units/.gitignore index 94876ed71f..3bae4b46b6 100644 --- a/units/.gitignore +++ b/units/.gitignore @@ -39,6 +39,7 @@ /systemd-machined.service /systemd-modules-load.service /systemd-networkd.service +/systemd-networkd-wait-online.service /systemd-nspawn@.service /systemd-poweroff.service /systemd-quotacheck.service diff --git a/units/systemd-networkd-wait-online.service.in b/units/systemd-networkd-wait-online.service.in new file mode 100644 index 0000000000..a9bad7aa8f --- /dev/null +++ b/units/systemd-networkd-wait-online.service.in @@ -0,0 +1,23 @@ +# This file is part of systemd. +# +# 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. + +[Unit] +Description=Wait for Network to be Configured +Documentation=man:systemd-networkd-wait-online.service(8) +DefaultDependencies=no +Conflicts=shutdown.target +Requisite=systemd-networkd.service +After=systemd-networkd.service +Before=network-online.target + +[Service] +Type=oneshot +ExecStart=@rootlibexecdir@/systemd-networkd-wait-online +RemainAfterExit=yes + +[Install] +WantedBy=network-online.target diff --git a/units/systemd-networkd.service.in b/units/systemd-networkd.service.in index 7fd31cf667..8dd37ff769 100644 --- a/units/systemd-networkd.service.in +++ b/units/systemd-networkd.service.in @@ -23,4 +23,5 @@ CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_BROADCAST CAP_N WatchdogSec=1min [Install] +Also=systemd-networkd-wait-online.service WantedBy=multi-user.target |