cli:status: start systemd-networkd to query its data

netplan/cli/commands/status.py

@@ -600,6 +600,10 @@ def pretty_print(self, data: JSON, total: int, _console_width=None) -> None:
             pprint('{} inactive interfaces hidden. Use "--all" to show all.'.format(hidden))
 
     def command(self):
+        # Make sure sd-networkd is running, as we need the data it provides.
+        if not utils.systemctl_is_active('systemd-networkd.service'):
+            utils.systemctl('start', ['systemd-networkd.service'], True)
+
         # required data: iproute2 and sd-networkd can be expected to exist,
         # due to hard package dependencies
         iproute2 = self.query_iproute2()

netplan/cli/utils.py

@@ -85,7 +85,7 @@ def systemctl_network_manager(action, sync=False):
     return systemctl(action, [NM_SERVICE_NAME], sync)  # pragma: nocover (covered in autopkgtest)
 
 
-def systemctl(action, services, sync=False):
+def systemctl(action: str, services: list, sync: bool = False):
     if len(services) >= 1:
         command = ['systemctl', action]
 

tests/cli/test_status.py

@@ -461,6 +461,31 @@ def test_call_cli_yaml(self, online_mock, resolvconf_mock, rd_mock, routes_mock,
     search: []
   online: false'''.strip())
 
+    @patch('netplan.cli.commands.status.NetplanStatus.query_iproute2')
+    @patch('netplan.cli.commands.status.NetplanStatus.query_networkd')
+    @patch('netplan.cli.commands.status.NetplanStatus.query_nm')
+    @patch('netplan.cli.commands.status.NetplanStatus.query_routes')
+    @patch('netplan.cli.commands.status.NetplanStatus.query_resolved')
+    @patch('netplan.cli.commands.status.NetplanStatus.resolvconf_json')
+    @patch('netplan.cli.commands.status.NetplanStatus.query_online_state')
+    @patch('netplan.cli.utils.systemctl_is_active')
+    @patch('netplan.cli.utils.systemctl')
+    def test_call_cli_no_networkd(self, systemctl_mock, is_active_mock,
+                                  online_mock, resolvconf_mock, rd_mock,
+                                  routes_mock, nm_mock, networkd_mock,
+                                  iproute2_mock):
+        status = NetplanStatus()
+        iproute2_mock.return_value = [FAKE_DEV]
+        networkd_mock.return_value = status.process_networkd(NETWORKD)
+        nm_mock.return_value = []
+        routes_mock.return_value = (None, None)
+        rd_mock.return_value = (None, None)
+        resolvconf_mock.return_value = {'addresses': [], 'search': [], 'mode': None}
+        online_mock.return_value = False
+        is_active_mock.return_value = False
+        self._call([])
+        systemctl_mock.assert_called_once_with('start', ['systemd-networkd.service'], True)
+
 
 class TestInterface(unittest.TestCase):
     '''Test netplan status' Interface class'''