1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
import ./make-test-python.nix ({ pkgs, lib, ... }: let
inherit (import ./ssh-keys.nix pkgs) snakeOilPrivateKey snakeOilPublicKey;
mkNode = vlan: id: {
virtualisation.vlans = [ vlan ];
networking = {
useDHCP = false;
useNetworkd = true;
};
systemd.network = {
enable = true;
networks."10-eth${toString vlan}" = {
matchConfig.Name = "eth${toString vlan}";
linkConfig.RequiredForOnline = "no";
networkConfig = {
Address = "192.168.${toString vlan}.${toString id}/24";
IPForward = "yes";
};
};
};
};
in {
name = "systemd-networkd-vrf";
meta.maintainers = with lib.maintainers; [ ma27 ];
nodes = {
client = { pkgs, ... }: {
virtualisation.vlans = [ 1 2 ];
networking = {
useDHCP = false;
useNetworkd = true;
firewall.checkReversePath = "loose";
};
systemd.network = {
enable = true;
netdevs."10-vrf1" = {
netdevConfig = {
Kind = "vrf";
Name = "vrf1";
MTUBytes = "1300";
};
vrfConfig.Table = 23;
};
netdevs."10-vrf2" = {
netdevConfig = {
Kind = "vrf";
Name = "vrf2";
MTUBytes = "1300";
};
vrfConfig.Table = 42;
};
networks."10-vrf1" = {
matchConfig.Name = "vrf1";
networkConfig.IPForward = "yes";
routes = [
{ Destination = "192.168.1.2"; Metric = 100; }
];
};
networks."10-vrf2" = {
matchConfig.Name = "vrf2";
networkConfig.IPForward = "yes";
routes = [
{ Destination = "192.168.2.3"; Metric = 100; }
];
};
networks."10-eth1" = {
matchConfig.Name = "eth1";
linkConfig.RequiredForOnline = "no";
networkConfig = {
VRF = "vrf1";
Address = "192.168.1.1/24";
IPForward = "yes";
};
};
networks."10-eth2" = {
matchConfig.Name = "eth2";
linkConfig.RequiredForOnline = "no";
networkConfig = {
VRF = "vrf2";
Address = "192.168.2.1/24";
IPForward = "yes";
};
};
};
};
node1 = lib.mkMerge [
(mkNode 1 2)
{
services.openssh.enable = true;
users.users.root.openssh.authorizedKeys.keys = [ snakeOilPublicKey ];
}
];
node2 = mkNode 2 3;
node3 = mkNode 2 4;
};
testScript = ''
import json
def compare(raw_json, to_compare):
data = json.loads(raw_json)
assert len(raw_json) >= len(to_compare)
for i, row in enumerate(to_compare):
actual = data[i]
assert len(row.keys()) > 0
for key, value in row.items():
assert value == actual[key], f"""
In entry {i}, value {key}: got: {actual[key]}, expected {value}
"""
start_all()
client.wait_for_unit("network.target")
node1.wait_for_unit("network.target")
node2.wait_for_unit("network.target")
node3.wait_for_unit("network.target")
# Check that networkd properly configures the main routing table
# and the routing tables for the VRF.
with subtest("check vrf routing tables"):
compare(
client.succeed("ip --json -4 route list"),
[
{"dst": "192.168.1.2", "dev": "vrf1", "metric": 100},
{"dst": "192.168.2.3", "dev": "vrf2", "metric": 100}
]
)
compare(
client.succeed("ip --json -4 route list table 23"),
[
{"dst": "192.168.1.0/24", "dev": "eth1", "prefsrc": "192.168.1.1"},
{"type": "local", "dst": "192.168.1.1", "dev": "eth1", "prefsrc": "192.168.1.1"},
{"type": "broadcast", "dev": "eth1", "prefsrc": "192.168.1.1", "dst": "192.168.1.255"}
]
)
compare(
client.succeed("ip --json -4 route list table 42"),
[
{"dst": "192.168.2.0/24", "dev": "eth2", "prefsrc": "192.168.2.1"},
{"type": "local", "dst": "192.168.2.1", "dev": "eth2", "prefsrc": "192.168.2.1"},
{"type": "broadcast", "dev": "eth2", "prefsrc": "192.168.2.1", "dst": "192.168.2.255"}
]
)
# Ensure that other nodes are reachable via ICMP through the VRF.
with subtest("icmp through vrf works"):
client.succeed("ping -c5 192.168.1.2")
client.succeed("ping -c5 192.168.2.3")
# Test whether TCP through a VRF IP is possible.
with subtest("tcp traffic through vrf works"):
node1.wait_for_open_port(22)
client.succeed(
"cat ${snakeOilPrivateKey} > privkey.snakeoil"
)
client.succeed("chmod 600 privkey.snakeoil")
client.succeed(
"ulimit -l 2048; ip vrf exec vrf1 ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i privkey.snakeoil root@192.168.1.2 true"
)
# Only configured routes through the VRF from the main routing table should
# work. Additional IPs are only reachable when binding to the vrf interface.
with subtest("only routes from main routing table work by default"):
client.fail("ping -c5 192.168.2.4")
client.succeed("ping -I vrf2 -c5 192.168.2.4")
client.shutdown()
node1.shutdown()
node2.shutdown()
node3.shutdown()
'';
})
|
