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client: add test for IPv6-only CNI interfaces

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Add a test case to verify that CNI results containing only IPv6 addresses
are handled correctly. This is a regression test for a bug introduced in
GH-23882 where IPv6-only interfaces would fail with 'no interface with an
address' error.

The test verifies that when a CNI plugin returns only an IPv6 address
(without IPv4), the allocation network status should be properly populated
with the IPv6 address in the AddressIPv6 field.
This commit is contained in:
Dmitrii Andreev
2025-10-08 17:27:27 +03:00
parent df4e97dc94
commit d058761dc7
1 changed files with 28 additions and 0 deletions
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28
client/allocrunner/networking_cni_test.go
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@@ -498,6 +498,34 @@ func TestCNI_cniToAllocNet_Dualstack(t *testing.T) {
test.Eq(t, "eth0", allocNet.InterfaceName)
}
// TestCNI_cniToAllocNet_IPv6Only asserts that CNI results containing only IPv6
// addresses work correctly. This is a regression test for a bug introduced in
// GH-23882 where IPv6-only interfaces would fail with "no interface with an address".
func TestCNI_cniToAllocNet_IPv6Only(t *testing.T) {
ci.Parallel(t)
cniResult := &cni.Result{
Interfaces: map[string]*cni.Config{
"eth0": {
Sandbox: "nomad-sandbox",
IPConfigs: []*cni.IPConfig{
{IP: net.ParseIP("fd00:a110:c8::b")}, // only IPv6
},
},
},
}
c := &cniNetworkConfigurator{
logger: testlog.HCLogger(t),
}
allocNet, err := c.cniToAllocNet(cniResult)
must.NoError(t, err)
must.NotNil(t, allocNet)
test.Eq(t, "", allocNet.Address)
test.Eq(t, "fd00:a110:c8::b", allocNet.AddressIPv6)
test.Eq(t, "eth0", allocNet.InterfaceName)
}
func TestCNI_addCustomCNIArgs(t *testing.T) {
ci.Parallel(t)
cniArgs := map[string]string{