The networkd backend logic for setting DHCP= on an interface is bugged
and inconsistent with the scripted logic. Consider this simple NixOS
configuration:
{
networking.useNetworkd = true;
networking.interfaces.eth0.wakeOnLan.enable = true;
}
The default value of networking.useDHCP is true, so we expect our eth0
interface to have DHCP enabled. With the scripted backend, this works.
But the networkd backend generates the following 40-eth0.network file:
[Match]
Name=eth0
[Network]
DHCP=no
IPv6PrivacyExtensions=kernel
This is happening because the wakeOnLan configuration creates a key in
networking.interfaces, and the networkd backend erroneously checks that
instead of for explicitly configured IP addresses as in the scripted
backend. The documentation is also inconsistent across various options.
This change aligns the networkd backend and option documentation to the
actual behavior of the scripted backend, and updates a test to account
for this behavior for both backends.
The logic for configuring a gateway without an interface specified adds
a route with Gateway= to *every interface* configured by NixOS for
networkd. This leads to nonsensical configurations like the following:
[Network]
DHCP=no
Address=192.168.0.1/24
[Route]
Gateway=10.0.0.1
GatewayOnLink=false
We remove this logic and make defaultGateway.interface required to
configure a default gateway when using networkd.
We can ignore the removal of GatewayOnLink because systemd defaults it
to "no" anyway.
Adds a new option to the virtualisation modules that enables specifying explicitly named network interfaces in QEMU VMs.
The existing `virtualisation.vlans` option is still supported for cases where the name of the network interface is irrelevant.
...for explicitly named network interfaces
This reverts commit 6ae3e7695e.
(and evaluation fixups 08d26bbb727aed90a969)
Some of the tests fail or time out after the merge.
Adds a new option to the virtualisation modules that enables specifying
explicitly named network interfaces in QEMU VMs. The existing
`virtualisation.vlans` is still supported for cases where the name of
the network interface is irrelevant.
The test was looking at the wrong interface and relying on silly
behaviour by the dummy driver, which autocreated a `dummy0` interface on
modprobe.
Fix this by making it look at the actual `foo` interface that the test
creates.
Previously the bonding driver would create an initial `bond0` interface
when it was loaded. If the network management integration used that
interface and did not recreate it, it was stuck to the default
`balance-rr` mode.
Deploying systemds modprobe.d configuration sets `max_bonds=0`, so we
don't run into that issue anymore.
Hence we now make sure that we can indeed create `bond0` with `802.3ad`
(LACP), which is a non default mode.
allows configuration of foo-over-udp decapsulation endpoints. sadly networkd
seems to lack the features necessary to support local and peer address
configuration, so those are only supported when using scripted configuration.
The current name is misleading: it doesn't contain cli arguments,
but several constants and utility functions related to qemu.
This commit also removes the use of `with import ...` for clarity.
Exclude static 192.168.*.2 addresses from the dynamic address range to
prevent different interfaces from getting the same address.
Seems like configuring a fixed IPv4 address does not automatically
exclude it from the dynamic address range.
Should fix occasional failures of
nixos.tests.networking.scripted.macvlan and possibly other networking
tests relying on DHCP.
This modifies the `router` to not give out a range of IP addresses but
only give out a fixed address based on the MAC address using the
`services.dhcpd4.machines` option.
To get access to the MAC address the `qemuNicMac` function is defined
and exported from `qemu-flags.nix`.
This was whitespace-sensitive, kept fighting with my editor and broke
the tests easily. To fix this, let python convert the output to
individual lines, and strip whitespace from them before comparing.
This mirrors the behaviour of systemd - It's udev that parses `.link`
files, not `systemd-networkd`.
This was originally applied in 36ef112a47,
but was reverted due to 1115959a8d causing
evaluation errors on hydra.
...even when networkd is disabled
This reverts commit ce78f3ac70, reversing
changes made to dc34da0755.
I'm sorry; Hydra has been unable to evaluate, always returning
> error: unexpected EOF reading a line
and I've been unable to reproduce the problem locally. Bisecting
pointed to this merge, but I still can't see what exactly was wrong.
The networking.virtual test does not work with networkd yet, for
multiple reasons:
- network-online.target is not reached, because tun0 and tap0 are
considered as required for online but _not_ brought up or assigned
the configured addresses
- the commands later in the test rely on some units from the scripted
network setup
cc @fpletz networkd exper
cc @globin we looked at this together
