nmcli: manage dummy connections (#3132)

* manage dummy connections

* add issue reference in changelog fragment

* Update changelogs/fragments/3132-nmcli-dummy.yaml

Co-authored-by: Ajpantuso <ajpantuso@gmail.com>

* resolve test conflicts

Co-authored-by: Ajpantuso <ajpantuso@gmail.com>

changelogs/fragments/3132-nmcli-dummy.yaml

@@ -0,0 +1,2 @@
+minor_changes:
+  - nmcli - add ``dummy`` interface support (https://github.com/ansible-collections/community.general/issues/724).

plugins/modules/net_tools/nmcli.py

@@ -51,10 +51,11 @@ options:
     type:
         description:
             - This is the type of device or network connection that you wish to create or modify.
+            - Type C(dummy) is added in community.general 3.5.0.
             - Type C(generic) is added in Ansible 2.5.
             - Type C(infiniband) is added in community.general 2.0.0.
         type: str
-        choices: [ bond, bond-slave, bridge, bridge-slave, ethernet, generic, infiniband, ipip, sit, team, team-slave, vlan, vxlan, wifi ]
+        choices: [ bond, bond-slave, bridge, bridge-slave, dummy, ethernet, generic, infiniband, ipip, sit, team, team-slave, vlan, vxlan, wifi ]
     mode:
         description:
             - This is the type of device or network connection that you wish to create for a bond or bridge.
@@ -775,6 +776,8 @@ class Nmcli(object):
 
         if self.method4:
             self.ipv4_method = self.method4
+        elif self.type == 'dummy' and not self.ip4:
+            self.ipv4_method = 'disabled'
         elif self.ip4:
             self.ipv4_method = 'manual'
         else:
@@ -782,6 +785,8 @@ class Nmcli(object):
 
         if self.method6:
             self.ipv6_method = self.method6
+        elif self.type == 'dummy' and not self.ip6:
+            self.ipv6_method = 'disabled'
         elif self.ip6:
             self.ipv6_method = 'manual'
         else:
@@ -938,6 +943,7 @@ class Nmcli(object):
         return self.type in (
             'bond',
             'bridge',
+            'dummy',
             'ethernet',
             'generic',
             'infiniband',
@@ -956,6 +962,7 @@ class Nmcli(object):
     @property
     def mtu_conn_type(self):
         return self.type in (
+            'dummy',
             'ethernet',
             'team-slave',
         )
@@ -1092,7 +1099,7 @@ class Nmcli(object):
 
     @property
     def create_connection_up(self):
-        if self.type in ('bond', 'ethernet', 'infiniband', 'wifi'):
+        if self.type in ('bond', 'dummy', 'ethernet', 'infiniband', 'wifi'):
             if (self.mtu is not None) or (self.dns4 is not None) or (self.dns6 is not None):
                 return True
         elif self.type == 'team':
@@ -1218,6 +1225,7 @@ def main():
                           'bond-slave',
                           'bridge',
                           'bridge-slave',
+                          'dummy',
                           'ethernet',
                           'generic',
                           'infiniband',

tests/unit/plugins/modules/net_tools/test_nmcli.py

@@ -74,6 +74,12 @@ TESTCASE_CONNECTION = [
         'state': 'absent',
         '_ansible_check_mode': True,
     },
+    {
+        'type': 'dummy',
+        'conn_name': 'non_existent_nw_device',
+        'state': 'absent',
+        '_ansible_check_mode': True,
+    },
 ]
 
 TESTCASE_GENERIC = [
@@ -485,6 +491,40 @@ TESTCASE_WIRELESS = [
     }
 ]
 
+TESTCASE_DUMMY_STATIC = [
+    {
+        'type': 'dummy',
+        'conn_name': 'non_existent_nw_device',
+        'ifname': 'dummy_non_existant',
+        'ip4': '10.10.10.10/24',
+        'gw4': '10.10.10.1',
+        'dns4': ['1.1.1.1', '8.8.8.8'],
+        'ip6': '2001:db8::1/128',
+        'state': 'present',
+        '_ansible_check_mode': False,
+    }
+]
+
+TESTCASE_DUMMY_STATIC_SHOW_OUTPUT = """\
+connection.id:                          non_existent_nw_device
+connection.interface-name:              dummy_non_existant
+connection.autoconnect:                 yes
+802-3-ethernet.mtu:                     auto
+ipv4.method:                            manual
+ipv4.addresses:                         10.10.10.10/24
+ipv4.gateway:                           10.10.10.1
+ipv4.ignore-auto-dns:                   no
+ipv4.ignore-auto-routes:                no
+ipv4.never-default:                     no
+ipv4.may-fail:                          yes
+ipv4.dns:                               1.1.1.1,8.8.8.8
+ipv6.method:                            auto
+ipv6.ignore-auto-dns:                   no
+ipv6.ignore-auto-routes:                no
+ipv6.method:                            manual
+ipv6.addresses:                         2001:db8::1/128
+"""
+
 
 def mocker_set(mocker,
                connection_exists=False,
@@ -641,6 +681,13 @@ def mocked_ethernet_connection_dhcp_to_static(mocker):
                ))
 
 
+@pytest.fixture
+def mocked_dummy_connection_static_unchanged(mocker):
+    mocker_set(mocker,
+               connection_exists=True,
+               execute_return=(0, TESTCASE_DUMMY_STATIC_SHOW_OUTPUT, ""))
+
+
 @pytest.mark.parametrize('patch_ansible_module', TESTCASE_BOND, indirect=['patch_ansible_module'])
 def test_bond_connection_create(mocked_generic_connection_create, capfd):
     """
@@ -1581,3 +1628,58 @@ def test_create_wireless(mocked_generic_connection_create, capfd):
     results = json.loads(out)
     assert not results.get('failed')
     assert results['changed']
+
+
+@pytest.mark.parametrize('patch_ansible_module', TESTCASE_DUMMY_STATIC, indirect=['patch_ansible_module'])
+def test_create_dummy_static(mocked_generic_connection_create, capfd):
+    """
+    Test : Create dummy connection with static IP configuration
+    """
+
+    with pytest.raises(SystemExit):
+        nmcli.main()
+
+    assert nmcli.Nmcli.execute_command.call_count == 2
+    arg_list = nmcli.Nmcli.execute_command.call_args_list
+    add_args, add_kw = arg_list[0]
+
+    assert add_args[0][0] == '/usr/bin/nmcli'
+    assert add_args[0][1] == 'con'
+    assert add_args[0][2] == 'add'
+    assert add_args[0][3] == 'type'
+    assert add_args[0][4] == 'dummy'
+    assert add_args[0][5] == 'con-name'
+    assert add_args[0][6] == 'non_existent_nw_device'
+
+    add_args_text = list(map(to_text, add_args[0]))
+    for param in ['connection.interface-name', 'dummy_non_existant',
+                  'ipv4.addresses', '10.10.10.10/24',
+                  'ipv4.gateway', '10.10.10.1',
+                  'ipv4.dns', '1.1.1.1,8.8.8.8',
+                  'ipv6.addresses', '2001:db8::1/128']:
+        assert param in add_args_text
+
+    up_args, up_kw = arg_list[1]
+    assert up_args[0][0] == '/usr/bin/nmcli'
+    assert up_args[0][1] == 'con'
+    assert up_args[0][2] == 'up'
+    assert up_args[0][3] == 'non_existent_nw_device'
+
+    out, err = capfd.readouterr()
+    results = json.loads(out)
+    assert not results.get('failed')
+    assert results['changed']
+
+
+@pytest.mark.parametrize('patch_ansible_module', TESTCASE_DUMMY_STATIC, indirect=['patch_ansible_module'])
+def test_dummy_connection_static_unchanged(mocked_dummy_connection_static_unchanged, capfd):
+    """
+    Test : Dummy connection with static IP configuration unchanged
+    """
+    with pytest.raises(SystemExit):
+        nmcli.main()
+
+    out, err = capfd.readouterr()
+    results = json.loads(out)
+    assert not results.get('failed')
+    assert not results['changed']