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1+# In contrast to systemd-networkd-dhcpserver, this test configures
2+# the router with a static DHCP lease for the client's MAC address.
3+import ./make-test-python.nix ({ lib, ... }: {
4+ name = "systemd-networkd-dhcpserver-static-leases";
5+ meta = with lib.maintainers; {
6+ maintainers = [ veehaitch tomfitzhenry ];
7+ };
8+ nodes = {
9+ router = {
10+ virtualisation.vlans = [ 1 ];
11+ systemd.services.systemd-networkd.environment.SYSTEMD_LOG_LEVEL = "debug";
12+ networking = {
13+ useNetworkd = true;
14+ useDHCP = false;
15+ firewall.enable = false;
16+ };
17+ systemd.network = {
18+ networks = {
19+ # systemd-networkd will load the first network unit file
20+ # that matches, ordered lexiographically by filename.
21+ # /etc/systemd/network/{40-eth1,99-main}.network already
22+ # exists. This network unit must be loaded for the test,
23+ # however, hence why this network is named such.
24+ "01-eth1" = {
25+ name = "eth1";
26+ networkConfig = {
27+ DHCPServer = true;
28+ Address = "10.0.0.1/24";
29+ };
30+ dhcpServerStaticLeases = [{
31+ dhcpServerStaticLeaseConfig = {
32+ MACAddress = "02:de:ad:be:ef:01";
33+ Address = "10.0.0.10";
34+ };
35+ }];
36+ };
37+ };
38+ };
39+ };
40+
41+ client = {
42+ virtualisation.vlans = [ 1 ];
43+ systemd.services.systemd-networkd.environment.SYSTEMD_LOG_LEVEL = "debug";
44+ networking = {
45+ useNetworkd = true;
46+ useDHCP = false;
47+ firewall.enable = false;
48+ interfaces.eth1 = {
49+ useDHCP = true;
50+ macAddress = "02:de:ad:be:ef:01";
51+ };
52+ };
53+
54+ # This setting is important to have the router assign the
55+ # configured lease based on the client's MAC address. Also see:
56+ # https://github.com/systemd/systemd/issues/21368#issuecomment-982193546
57+ systemd.network.networks."40-eth1".dhcpV4Config.ClientIdentifier = "mac";
58+ };
59+ };
60+ testScript = ''
61+ start_all()
62+
63+ with subtest("check router network configuration"):
64+ router.wait_for_unit("systemd-networkd-wait-online.service")
65+ eth1_status = router.succeed("networkctl status eth1")
66+ assert "Network File: /etc/systemd/network/01-eth1.network" in eth1_status, \
67+ "The router interface eth1 is not using the expected network file"
68+ assert "10.0.0.1" in eth1_status, "Did not find expected router IPv4"
69+
70+ with subtest("check client network configuration"):
71+ client.wait_for_unit("systemd-networkd-wait-online.service")
72+ eth1_status = client.succeed("networkctl status eth1")
73+ assert "Network File: /etc/systemd/network/40-eth1.network" in eth1_status, \
74+ "The client interface eth1 is not using the expected network file"
75+ assert "10.0.0.10" in eth1_status, "Did not find expected client IPv4"
76+
77+ with subtest("router and client can reach each other"):
78+ client.wait_until_succeeds("ping -c 5 10.0.0.1")
79+ router.wait_until_succeeds("ping -c 5 10.0.0.10")
80+ '';
81+})