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nixos/tests/networking.nix: test the services.dhcpd4.machines option

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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 commit is contained in:
Bas van Dijk 2020-04-20 22:06:02 +02:00
parent 0410f5dff9
commit e15815e885
2 changed files with 15 additions and 9 deletions
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5
nixos/lib/qemu-flags.nix
View File

@ -9,10 +9,11 @@ let
else pkgs.lib.toHex n);
in
{
rec {
qemuNicMac = net: machine: "52:54:00:12:${zeroPad net}:${zeroPad machine}";
qemuNICFlags = nic: net: machine:
[ "-device virtio-net-pci,netdev=vlan${toString nic},mac=52:54:00:12:${zeroPad net}:${zeroPad machine}"
[ "-device virtio-net-pci,netdev=vlan${toString nic},mac=${qemuNicMac net machine}"
"-netdev vde,id=vlan${toString nic},sock=$QEMU_VDE_SOCKET_${toString net}"
];

19
nixos/tests/networking.nix
View File

@ -8,7 +8,9 @@ with import ../lib/testing-python.nix { inherit system pkgs; };
with pkgs.lib;
let
router = { config, pkgs, ... }:
qemu-flags = import ../lib/qemu-flags.nix { inherit pkgs; };
router = { config, pkgs, lib, ... }:
with pkgs.lib;
let
vlanIfs = range 1 (length config.virtualisation.vlans);
@ -31,16 +33,19 @@ let
enable = true;
interfaces = map (n: "eth${toString n}") vlanIfs;
extraConfig = ''
authoritative;
'' + flip concatMapStrings vlanIfs (n: ''
subnet 192.168.${toString n}.0 netmask 255.255.255.0 {
option routers 192.168.${toString n}.1;
# XXX: technically it's _not guaranteed_ that IP addresses will be
# issued from the first item in range onwards! We assume that in
# our tests however.
range 192.168.${toString n}.2 192.168.${toString n}.254;
}
'');
'')
;
machines = lib.flip map vlanIfs (vlan:
{
hostName = "client${toString vlan}";
ethernetAddress = qemu-flags.qemuNicMac vlan 1;
ipAddress = "192.168.${toString vlan}.2";
}
);
};
services.radvd = {
enable = true;