This is the approach used by systemd-networkd.
I don't understand the logic that caused systemd-networkd to make the change -
9e49656037
Instead, I am suggesting it for consistency, and because it seems to me this is the
exact correct behaviour. Because if you enable NetworkManager, and rely on it to
configure your network devices, then network mounts will not start correctly at boot
time unless you also enable NetworkManager-wait-online.service.
Enabling NetworkManager-wait-online.service does not cause unnecessary serialization
of the boot process; it is only pulled in if something else (like a network mount)
pulls in network-online.target.
I am suggesting this in response to reading this user support request [1].
[1] https://unix.stackexchange.com/questions/429604/fstab-not-automatically-mounting-smb-storage
[thaller@redhat.com: reworded commit message]
https://github.com/NetworkManager/NetworkManager/pull/76
`systemctl start network-online.target` should suffice to start
"NetworkManager.service".
That would work because
- "network-online.target" has "Wants=NetworkManager-wait-online.service"
- "NetworkManager-wait-online.service" has "Require=NetworkManager.service".
But previously, "NetworkManager-wait-online.service" would just
fail with missing dependency.
See also https://github.com/systemd/systemd/pull/6065 which does the
same for networkd's wait-online serice, and see rh#1452866 for a
use-case.
Related: https://bugzilla.redhat.com/show_bug.cgi?id=1452866
Add new Reload D-Bus command to reload NetworkManager configuration.
For now, this is like sending SIGHUP to the process. There are several
advantages here:
- it is guarded via PolicyKit authentication while signals
can only be sent by root.
- the user can wait for the reload to be complete instead of sending
an asynchronous signal. For now, we operation completes after
nm_config_reload() returns, but later we could delay the response
further until specific parts are fully reloaded.
- SIGHUP reloads everything including re-reading configuration from
disk while SIGUSR1 reloads just certain parts such as writing out DNS
configuration anew.
Now, the Reload command has a flags argument which is more granular
in selecting parts which are to be reloaded. For example, via
signals the user can:
1) send SIGUSR1: this writes out the DNS configuration to
resolv.conf and possibly reloads other parts without
re-reading configuration and without restarting the DNS plugin.
2) send SIGHUP: this reloads configuration from disk,
writes out resolv.conf and restarts the DNS plugin.
There is no way, to only restart the DNS plugin without also reloading
everything else.
network.target is a very early boot target which basically says "I can start
opening sockets now". It has nothing to do with being connected to the internet
and is often required by early boot services as well.
Drop the unnecessary and wrong Wants=/Before=network.target to avoid dependency
cycles and boot delays.
https://bugzilla.gnome.org/show_bug.cgi?id=746039https://launchpad.net/1430280
Those are not required with systemd-udevd v210 or newer. This way
distros which have a new enough version of udev can skip installing
84-nm-drivers.rules. While at it, don't use absolute paths for sed and
ethtool.
This reverts commit 44fee0f6ff.
Bad quoting here. Also, this is not quite the best fix for the issue,
filtering on ACTION=="add" is probably a bit more elegant.
ethtool may cause the auto-loading of a kernel module for non-existing
interface-names. Avoid that by checking whether such an interface exists.
This is inherently racy.
Since f9e4af2, parts of the configuration can be reloaded
by sending SIGHUP to NetworkManager. Add ExecReload option
to service file to support reloading by sending a signal.
Note that 'man 5 systemd.service' advices to use a blocking
command instead of a sending a signal. Later we should add a
D-Bus method to allow reloading synchronously. For now, this
is better then nothing.
https://mail.gnome.org/archives/networkmanager-list/2015-April/msg00042.html
No idea why was it there in the first place.
This also fixes a bug that the rules file was conditionally included in dist
depending on presence of udev dir at configure time.
There are some out-of-tree drivers that create devices masquerading as
ethernets which are supposed to use their own management tools. Avoid touching
them.
The rules should be run after 80-net-setup-link.rules, so that the
ID_NET_DRIVER is set.
When reinstalling NM on the same location, it would fail with
Making install in data
make[1]: Entering directory `/home/data/src/NetworkManager/data'
make[2]: Entering directory `/home/data/src/NetworkManager/data'
install -d /opt/test/lib/systemd/system/network-online.target.wants
ln -s /opt/test/lib/systemd/system/NetworkManager-wait-online.service /opt/test/lib/systemd/system/network-online.target.wants
ln: failed to create symbolic link ‘/opt/test/lib/systemd/system/network-online.target.wants/NetworkManager-wait-online.service’: File exists
make[2]: *** [install-exec-local] Error 1
https://bugzilla.gnome.org/show_bug.cgi?id=728965
Signed-off-by: Thomas Haller <thaller@redhat.com>
Make network-online.target depend on NetworkManager-wait-online.service
just as is done in Fedora. This makes network-online.target work with
NetworkManager as described in systemd documentation.
An alternative way would be to use a combination of setting
Install.WantedBy to network-online.target and enabling the service by
default. This alternative approach is currently used by
systemd-networkd.
https://bugzilla.gnome.org/show_bug.cgi?id=728965
Acked-By: Dan Williams <dcbw@redhat.com>
You're supposed to be able to use dispatcher scripts to spawn
long-running processes, but currently systemd will kill them when
nm-dispatcher exits. Fix that.
https://bugzilla.gnome.org/show_bug.cgi?id=725492
Lennart sez:
"Oh, I wasn't aware it is short-lived only. In that case, drop the
multi-user.target bit, and just make it create the dbus alias.
[Install]
Alias=dbus-org.freedesktop.nm-dispatcher.service
And yeah, adding Also=NetworkManager-dispatcher.service to
NetworkManager.service certainly would be a good idea."
The previous ignore-carrier rules did not work well with dynamic IP
(dhcp/slaac) connections. Change the rule so that only static IP
connections can be activated when carrier is not present (but both
static and dynamic connections will remain up when carrier is lost).
Add a "monitor-connection-files" config option, which can be set to
"false" to disable automatic reloading of connections on file change.
To go with this, add a new ReloadConnections method on
o.fd.NM.Settings that can be used to manually reload connections, and
add an nm-cli command to call it.
systemd's new network-online target abstracts the "wait until
networking is up" stuff, and NM-wait-online implements that
functionality. Thus NM-wait-online should be ordered before
(and thus be a dependency of) network-online.
When run with --no-daemon, NM used to duplicate all syslog output to
stderr, for ease of debugging. But this meant it had to tell systemd
to ignore stderr, so you wouldn't get duplicated log entries. But that
meant we lost error messages that didn't go through nm_log. (eg,
g_warning()s and g_return_if_fail()s).
Fix this by making --no-daemon no longer duplicate syslog output to
stderr, and removing the "StandardError=null" from the systemd service
file. To get the old behavior, you can use --debug instead of
--no-daemon.
https://bugzilla.gnome.org/show_bug.cgi?id=700550
