net: Fix static routes to host in eni renderer (#668)

Route '-net' parameter is incompatible with /32 IPv4 addresses so we
have to use '-host' in that case.

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/integration_tests/bugs/test_gh668.py b/tests/integration_tests/bugs/test_gh668.py
new file mode 100644
index 00000000..a3a0c374
--- /dev/null
+++ b/tests/integration_tests/bugs/test_gh668.py
@@ -0,0 +1,37 @@
+"""Integration test for gh-668.
+
+Ensure that static route to host is working correctly.
+The original problem is specific to the ENI renderer but that test is suitable
+for all network configuration outputs.
+"""
+
+import pytest
+
+from tests.integration_tests.instances import IntegrationInstance
+
+
+DESTINATION_IP = "172.16.0.10"
+GATEWAY_IP = "10.0.0.100"
+
+NETWORK_CONFIG = """\
+version: 2
+ethernets:
+  eth0:
+    addresses: [10.0.0.10/8]
+    dhcp4: false
+    routes:
+    - to: {}/32
+      via: {}
+""".format(DESTINATION_IP, GATEWAY_IP)
+
+EXPECTED_ROUTE = "{} via {}".format(DESTINATION_IP, GATEWAY_IP)
+
+
+@pytest.mark.lxd_container
+@pytest.mark.lxd_vm
+@pytest.mark.lxd_config_dict({
+    "user.network-config": NETWORK_CONFIG,
+})
+def test_static_route_to_host(client: IntegrationInstance):
+    route = client.execute("ip route | grep {}".format(DESTINATION_IP))
+    assert route.startswith(EXPECTED_ROUTE)