Enable to specify which fixed-ip to add to a vm.

This change enables to specify which fixed-ip will be added to a vm using:

 openstack server add fixed ip <vm> <network> --fixed-ip-address <ip>

This change uses interface_attach instead of add_fixed_ip[1] which is
less flexible and uses a deprecated API.

[1] https://review.openstack.org/384261

Closes-Bug: #1678140
Change-Id: I7fe4621439ef0d8dca080551ffaeb614c5a91174

doc/source/command-objects/server.rst

@@ -13,9 +13,14 @@ Add fixed IP address to server
 .. code:: bash
 
     openstack server add fixed ip
+        [--fixed-ip-address <ip-address>]
         <server>
         <network>
 
+.. option:: --fixed-ip-address <ip-address>
+
+    Requested fixed IP address
+
 .. describe:: <server>
 
     Server to receive the fixed IP address (name or ID)

openstackclient/compute/v2/server.py

@@ -206,6 +206,11 @@ class AddFixedIP(command.Command):
                 "Network to allocate the fixed IP address from (name or ID)"
             ),
         )
+        parser.add_argument(
+            "--fixed-ip-address",
+            metavar="<ip-address>",
+            help=_("Requested fixed IP address"),
+        )
         return parser
 
     def take_action(self, parsed_args):
@@ -217,7 +222,8 @@ class AddFixedIP(command.Command):
         network = utils.find_resource(
             compute_client.networks, parsed_args.network)
 
-        server.add_fixed_ip(network.id)
+        server.interface_attach(port_id=None, net_id=network.id,
+                                fixed_ip=parsed_args.fixed_ip_address)
 
 
 class AddFloatingIP(command.Command):

openstackclient/tests/unit/compute/v2/test_server.py

@@ -104,10 +104,10 @@ class TestServerAddFixedIP(TestServer):
 
         # Set add_fixed_ip method to be tested.
         self.methods = {
-            'add_fixed_ip': None,
+            'interface_attach': None,
         }
 
-    def test_server_add_fixed_ip(self):
+    def _test_server_add_fixed_ip(self, extralist, fixed_ip_address):
         servers = self.setup_servers_mock(count=1)
         network = compute_fakes.FakeNetwork.create_one_network()
         self.networks_mock.get.return_value = network
@@ -115,20 +115,28 @@ class TestServerAddFixedIP(TestServer):
         arglist = [
             servers[0].id,
             network.id,
-        ]
+        ] + extralist
         verifylist = [
             ('server', servers[0].id),
-            ('network', network.id)
+            ('network', network.id),
+            ('fixed_ip_address', fixed_ip_address)
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
 
         result = self.cmd.take_action(parsed_args)
 
-        servers[0].add_fixed_ip.assert_called_once_with(
+        servers[0].interface_attach.assert_called_once_with(
-            network.id,
+            port_id=None, net_id=network.id, fixed_ip=fixed_ip_address
         )
         self.assertIsNone(result)
 
+    def test_server_add_fixed_ip(self):
+        self._test_server_add_fixed_ip([], None)
+
+    def test_server_add_specific_fixed_ip(self):
+        extralist = ['--fixed-ip-address', '5.6.7.8']
+        self._test_server_add_fixed_ip(extralist, '5.6.7.8')
+
 
 class TestServerAddFloatingIP(TestServer):
 

releasenotes/notes/allow-to-vm-ip-to-add-7721ba64b863fa77.yaml

@@ -0,0 +1,6 @@
+---
+features:
+    - |
+      Add ``--fixed-ip-address`` option to the ``server add fixed ip`` command
+      [Bug `1678140 <https://bugs.launchpad.net/python-openstackclient/+bug/1678140>`_]
+