Add support for v2.37 and auto-allocated networking

This adds support for the v2.37 microversion. The networks
part of the server create request is required in this
microversion so if nothing is specified for --nic arguments
on the command line we default to 'auto' for backward
compatibility in the CLI.

Part of blueprint get-me-a-network

Change-Id: I6636ddcd3be7bf393d2d69cc6c1ba5c7d65ff674

7 files changed, 315 insertions, 32 deletions

diff --git a/novaclient/__init__.py b/novaclient/__init__.py
index 942f43ca..f9270766 100644
--- a/novaclient/__init__.py
+++ b/novaclient/__init__.py
@@ -25,4 +25,4 @@ API_MIN_VERSION = api_versions.APIVersion("2.1")
 # when client supported the max version, and bumped sequentially, otherwise
 # the client may break due to server side new version may include some
 # backward incompatible change.
-API_MAX_VERSION = api_versions.APIVersion("2.36")
+API_MAX_VERSION = api_versions.APIVersion("2.37")
diff --git a/novaclient/tests/functional/v2/test_servers.py b/novaclient/tests/functional/v2/test_servers.py
index 6d03b791..3d8c5128 100644
--- a/novaclient/tests/functional/v2/test_servers.py
+++ b/novaclient/tests/functional/v2/test_servers.py
@@ -172,3 +172,59 @@ class TestServersTagsV226(base.ClientTestBase):
         uuid = self._boot_server_with_tags()
         self.nova("server-tag-delete-all %s" % uuid)
         self.assertEqual([], self.client.servers.tag_list(uuid))
+
+
+class TestServersAutoAllocateNetworkCLI(base.ClientTestBase):
+
+    COMPUTE_API_VERSION = '2.37'
+
+    def _find_network_in_table(self, table):
+        # Example:
+        # +-----------------+-----------------------------------+
+        # |   Property      |               Value               |
+        # +-----------------+-----------------------------------+
+        # | private network |          192.168.154.128          |
+        # +-----------------+-----------------------------------+
+        for line in table.split('\n'):
+            if '|' in line:
+                l_property, l_value = line.split('|')[1:3]
+                if ' network' in l_property.strip():
+                    return ' '.join(l_property.strip().split()[:-1])
+
+    def test_boot_server_with_auto_network(self):
+        """Tests that the CLI defaults to 'auto' when --nic isn't specified.
+        """
+        server_info = self.nova('boot', params=(
+            '%(name)s --flavor %(flavor)s --poll '
+            '--image %(image)s ' % {'name': self.name_generate('server'),
+                                    'flavor': self.flavor.id,
+                                    'image': self.image.id}))
+        server_id = self._get_value_from_the_table(server_info, 'id')
+        self.addCleanup(self.wait_for_resource_delete,
+                        server_id, self.client.servers)
+        self.addCleanup(self.client.servers.delete, server_id)
+        # get the server details to verify there is a network, we don't care
+        # what the network name is, we just want to see an entry show up
+        server_info = self.nova('show', params=server_id)
+        network = self._find_network_in_table(server_info)
+        self.assertIsNotNone(
+            network, 'Auto-allocated network not found: %s' % server_info)
+
+    def test_boot_server_with_no_network(self):
+        """Tests that '--nic none' is honored.
+        """
+        server_info = self.nova('boot', params=(
+            '%(name)s --flavor %(flavor)s --poll '
+            '--image %(image)s --nic none' %
+            {'name': self.name_generate('server'),
+             'flavor': self.flavor.id,
+             'image': self.image.id}))
+        server_id = self._get_value_from_the_table(server_info, 'id')
+        self.addCleanup(self.wait_for_resource_delete,
+                        server_id, self.client.servers)
+        self.addCleanup(self.client.servers.delete, server_id)
+        # get the server details to verify there is not a network
+        server_info = self.nova('show', params=server_id)
+        network = self._find_network_in_table(server_info)
+        self.assertIsNone(
+            network, 'Unexpected network allocation: %s' % server_info)
diff --git a/novaclient/tests/unit/v2/test_servers.py b/novaclient/tests/unit/v2/test_servers.py
index 06d99309..2e057b03 100644
--- a/novaclient/tests/unit/v2/test_servers.py
+++ b/novaclient/tests/unit/v2/test_servers.py
@@ -42,6 +42,11 @@ class ServersTest(utils.FixturedTestCase):
         if self.api_version:
             self.cs.api_version = api_versions.APIVersion(self.api_version)
 
+    def _get_server_create_default_nics(self):
+        """Callback for default nics kwarg when creating a server.
+        """
+        return None
+
     def test_list_servers(self):
         sl = self.cs.servers.list()
         self.assert_request_id(sl, fakes.FAKE_REQUEST_ID_LIST)
@@ -132,7 +137,8 @@ class ServersTest(utils.FixturedTestCase):
             files={
                 '/etc/passwd': 'some data',                 # a file
                 '/tmp/foo.txt': six.StringIO('data'),   # a stream
-            }
+            },
+            nics=self._get_server_create_default_nics()
         )
         self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
         self.assert_called('POST', '/servers')
@@ -191,7 +197,8 @@ class ServersTest(utils.FixturedTestCase):
                 meta={'foo': 'bar'},
                 userdata="hello moto",
                 key_name="fakekey",
-                block_device_mapping_v2=bdm
+                block_device_mapping_v2=bdm,
+                nics=self._get_server_create_default_nics()
             )
             self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
             self.assert_called('POST', '/os-volumes_boot')
@@ -239,7 +246,8 @@ class ServersTest(utils.FixturedTestCase):
                 userdata="hello moto",
                 key_name="fakekey",
                 access_ip_v6=access_ip_v6,
-                access_ip_v4=access_ip_v4
+                access_ip_v4=access_ip_v4,
+                nics=self._get_server_create_default_nics()
             )
             self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
             self.assert_called('POST', '/servers')
@@ -256,6 +264,7 @@ class ServersTest(utils.FixturedTestCase):
                 '/etc/passwd': 'some data',                 # a file
                 '/tmp/foo.txt': six.StringIO('data'),   # a stream
             },
+            nics=self._get_server_create_default_nics(),
         )
         self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
         self.assert_called('POST', '/servers')
@@ -273,6 +282,7 @@ class ServersTest(utils.FixturedTestCase):
                 '/etc/passwd': 'some data',                 # a file
                 '/tmp/foo.txt': six.StringIO('data'),   # a stream
             },
+            nics=self._get_server_create_default_nics(),
         )
         self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
         self.assert_called('POST', '/servers')
@@ -290,6 +300,7 @@ class ServersTest(utils.FixturedTestCase):
                 '/etc/passwd': 'some data',                 # a file
                 '/tmp/foo.txt': six.StringIO('data'),   # a stream
             },
+            nics=self._get_server_create_default_nics(),
         )
         self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
         self.assert_called('POST', '/servers')
@@ -303,7 +314,8 @@ class ServersTest(utils.FixturedTestCase):
             image=1,
             flavor=1,
             admin_pass=test_password,
-            key_name=test_key
+            key_name=test_key,
+            nics=self._get_server_create_default_nics()
         )
         self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
         self.assert_called('POST', '/servers')
@@ -328,6 +340,7 @@ class ServersTest(utils.FixturedTestCase):
                     '/etc/passwd': 'some data',                 # a file
                     '/tmp/foo.txt': six.StringIO('data'),   # a stream
                 },
+                nics=self._get_server_create_default_nics(),
             )
             self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
             self.assert_called('POST', '/servers')
@@ -343,7 +356,8 @@ class ServersTest(utils.FixturedTestCase):
             name="My server",
             image=1,
             flavor=1,
-            disk_config=disk_config
+            disk_config=disk_config,
+            nics=self._get_server_create_default_nics(),
         )
         self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
         self.assert_called('POST', '/servers')
@@ -976,6 +990,16 @@ class ServersTest(utils.FixturedTestCase):
                           key_name="fakekey"
                           )
 
+    def test_create_server_with_nics_auto(self):
+        """Negative test for specifying nics='auto' before 2.37
+        """
+        self.assertRaises(ValueError,
+                          self.cs.servers.create,
+                          name='test',
+                          image='d9d8d53c-4b4a-4144-a5e5-b30d9f1fe46a',
+                          flavor='1',
+                          nics='auto')
+
 
 class ServersV26Test(ServersTest):
 
@@ -1074,7 +1098,8 @@ class ServersV219Test(ServersV217Test):
             flavor=1,
             meta={'foo': 'bar'},
             userdata="hello moto",
-            key_name="fakekey"
+            key_name="fakekey",
+            nics=self._get_server_create_default_nics()
         )
         self.assert_called('POST', '/servers')
 
@@ -1260,3 +1285,39 @@ class ServersV232Test(ServersV226Test):
                           image=1, flavor=1, meta={'foo': 'bar'},
                           userdata="hello moto", key_name="fakekey",
                           block_device_mapping_v2=bdm)
+
+
+class ServersV2_37Test(ServersV226Test):
+
+    api_version = "2.37"
+
+    def _get_server_create_default_nics(self):
+        return 'auto'
+
+    def test_create_server_no_nics(self):
+        """Tests that nics are required in microversion 2.37+
+        """
+        self.assertRaises(ValueError, self.cs.servers.create,
+                          name='test',
+                          image='d9d8d53c-4b4a-4144-a5e5-b30d9f1fe46a',
+                          flavor='1')
+
+    def test_create_server_with_nics_auto(self):
+        s = self.cs.servers.create(
+            name='test', image='d9d8d53c-4b4a-4144-a5e5-b30d9f1fe46a',
+            flavor='1', nics=self._get_server_create_default_nics())
+        self.assert_request_id(s, fakes.FAKE_REQUEST_ID_LIST)
+        self.assert_called('POST', '/servers')
+        self.assertIsInstance(s, servers.Server)
+
+    def test_add_floating_ip(self):
+        # self.cs.floating_ips.list() is not available after 2.35
+        pass
+
+    def test_add_floating_ip_to_fixed(self):
+        # self.cs.floating_ips.list() is not available after 2.35
+        pass
+
+    def test_remove_floating_ip(self):
+        # self.cs.floating_ips.list() is not available after 2.35
+        pass
diff --git a/novaclient/tests/unit/v2/test_shell.py b/novaclient/tests/unit/v2/test_shell.py
index db8f1abf..34eec493 100644
--- a/novaclient/tests/unit/v2/test_shell.py
+++ b/novaclient/tests/unit/v2/test_shell.py
@@ -606,6 +606,64 @@ class ShellTest(utils.TestCase):
                                cmd, api_version='2.32')
         self.assertIn('tag=tag', six.text_type(ex))
 
+    def test_boot_invalid_nics_v2_36_auto(self):
+        """This is a negative test to make sure we fail with the correct
+        message. --nic auto isn't allowed before 2.37.
+        """
+        cmd = ('boot --image %s --flavor 1 --nic auto test' % FAKE_UUID_1)
+        ex = self.assertRaises(exceptions.CommandError, self.run_command,
+                               cmd, api_version='2.36')
+        self.assertNotIn('auto,none', six.text_type(ex))
+
+    def test_boot_invalid_nics_v2_37(self):
+        """This is a negative test to make sure we fail with the correct
+        message.
+        """
+        cmd = ('boot --image %s --flavor 1 '
+               '--nic net-id=1 --nic auto some-server' % FAKE_UUID_1)
+        ex = self.assertRaises(exceptions.CommandError, self.run_command,
+                               cmd, api_version='2.37')
+        self.assertIn('auto,none', six.text_type(ex))
+
+    def test_boot_nics_auto_allocate_default(self):
+        """Tests that if microversion>=2.37 is specified and no --nics are
+        specified that a single --nic with net-id=auto is used.
+        """
+        cmd = 'boot --image %s --flavor 1 some-server' % FAKE_UUID_1
+        self.run_command(cmd, api_version='2.37')
+        self.assert_called_anytime(
+            'POST', '/servers',
+            {
+                'server': {
+                    'flavorRef': '1',
+                    'name': 'some-server',
+                    'imageRef': FAKE_UUID_1,
+                    'min_count': 1,
+                    'max_count': 1,
+                    'networks': 'auto',
+                },
+            },
+        )
+
+    def test_boot_nics_auto_allocate_none(self):
+        """Tests specifying '--nic none' with microversion 2.37
+        """
+        cmd = 'boot --image %s --flavor 1 --nic none some-server' % FAKE_UUID_1
+        self.run_command(cmd, api_version='2.37')
+        self.assert_called_anytime(
+            'POST', '/servers',
+            {
+                'server': {
+                    'flavorRef': '1',
+                    'name': 'some-server',
+                    'imageRef': FAKE_UUID_1,
+                    'min_count': 1,
+                    'max_count': 1,
+                    'networks': 'none',
+                },
+            },
+        )
+
     def test_boot_nics_ipv6(self):
         cmd = ('boot --image %s --flavor 1 '
                '--nic net-id=a=c,v6-fixed-ip=2001:db9:0:1::10 some-server' %
@@ -3062,6 +3120,7 @@ class ShellTest(utils.TestCase):
             32,  # doesn't require separate version-wrapped methods in
                  # novaclient
             34,  # doesn't require any changes in novaclient
+            37,  # There are no versioned wrapped shell method changes for this
         ])
         versions_supported = set(range(0,
                                  novaclient.API_MAX_VERSION.ver_minor + 1))
diff --git a/novaclient/v2/servers.py b/novaclient/v2/servers.py
index ebeaaee3..e24fa43a 100644
--- a/novaclient/v2/servers.py
+++ b/novaclient/v2/servers.py
@@ -709,27 +709,32 @@ class ServerManager(base.BootingManagerWithFind):
             body['server']['block_device_mapping_v2'] = block_device_mapping_v2
 
         if nics is not None:
-            # NOTE(tr3buchet): nics can be an empty list
-            all_net_data = []
-            for nic_info in nics:
-                net_data = {}
-                # if value is empty string, do not send value in body
-                if nic_info.get('net-id'):
-                    net_data['uuid'] = nic_info['net-id']
-                if (nic_info.get('v4-fixed-ip') and
-                        nic_info.get('v6-fixed-ip')):
-                    raise base.exceptions.CommandError(_(
-                        "Only one of 'v4-fixed-ip' and 'v6-fixed-ip' may be"
-                        " provided."))
-                elif nic_info.get('v4-fixed-ip'):
-                    net_data['fixed_ip'] = nic_info['v4-fixed-ip']
-                elif nic_info.get('v6-fixed-ip'):
-                    net_data['fixed_ip'] = nic_info['v6-fixed-ip']
-                if nic_info.get('port-id'):
-                    net_data['port'] = nic_info['port-id']
-                if nic_info.get('tag'):
-                    net_data['tag'] = nic_info['tag']
-                all_net_data.append(net_data)
+            # With microversion 2.37+ nics can be an enum of 'auto' or 'none'
+            # or a list of dicts.
+            if isinstance(nics, six.string_types):
+                all_net_data = nics
+            else:
+                # NOTE(tr3buchet): nics can be an empty list
+                all_net_data = []
+                for nic_info in nics:
+                    net_data = {}
+                    # if value is empty string, do not send value in body
+                    if nic_info.get('net-id'):
+                        net_data['uuid'] = nic_info['net-id']
+                    if (nic_info.get('v4-fixed-ip') and
+                            nic_info.get('v6-fixed-ip')):
+                        raise base.exceptions.CommandError(_(
+                            "Only one of 'v4-fixed-ip' and 'v6-fixed-ip' "
+                            "may be provided."))
+                    elif nic_info.get('v4-fixed-ip'):
+                        net_data['fixed_ip'] = nic_info['v4-fixed-ip']
+                    elif nic_info.get('v6-fixed-ip'):
+                        net_data['fixed_ip'] = nic_info['v6-fixed-ip']
+                    if nic_info.get('port-id'):
+                        net_data['port'] = nic_info['port-id']
+                    if nic_info.get('tag'):
+                        net_data['tag'] = nic_info['tag']
+                    all_net_data.append(net_data)
             body['server']['networks'] = all_net_data
 
         if disk_config is not None:
@@ -1219,6 +1224,14 @@ class ServerManager(base.BootingManagerWithFind):
                                          base.getid(server))
         return base.TupleWithMeta((resp, body), resp)
 
+    def _validate_create_nics(self, nics):
+        # nics are required with microversion 2.37+ and can be a string or list
+        if self.api_version > api_versions.APIVersion('2.36'):
+            if not nics:
+                raise ValueError('nics are required after microversion 2.36')
+        elif nics and not isinstance(nics, list):
+            raise ValueError('nics must be a list')
+
     def create(self, name, image, flavor, meta=None, files=None,
                reservation_id=None, min_count=None,
                max_count=None, security_groups=None, userdata=None,
@@ -1259,9 +1272,17 @@ class ServerManager(base.BootingManagerWithFind):
                       device mappings for this server.
         :param block_device_mapping_v2: (optional extension) A dict of block
                       device mappings for this server.
-        :param nics:  (optional extension) an ordered list of nics to be
-                      added to this server, with information about
-                      connected networks, fixed IPs, port etc.
+        :param nics:  An ordered list of nics (dicts) to be added to this
+                      server, with information about connected networks,
+                      fixed IPs, port etc.
+                      Beginning in microversion 2.37 this field is required and
+                      also supports a single string value of 'auto' or 'none'.
+                      The 'auto' value means the Compute service will
+                      automatically allocate a network for the project if one
+                      is not available. This is the same behavior as not
+                      passing anything for nics before microversion 2.37. The
+                      'none' value tells the Compute service to not allocate
+                      any networking for the server.
         :param scheduler_hints: (optional extension) arbitrary key-value pairs
                             specified by the client to help boot an instance
         :param config_drive: (optional extension) value for config drive
@@ -1289,6 +1310,8 @@ class ServerManager(base.BootingManagerWithFind):
         if "description" in kwargs and self.api_version < descr_microversion:
             raise exceptions.UnsupportedAttribute("description", "2.19")
 
+        self._validate_create_nics(nics)
+
         tags_microversion = api_versions.APIVersion("2.32")
         if self.api_version < tags_microversion:
             if nics:
diff --git a/novaclient/v2/shell.py b/novaclient/v2/shell.py
index b49656a5..a823cd4a 100644
--- a/novaclient/v2/shell.py
+++ b/novaclient/v2/shell.py
@@ -188,7 +188,16 @@ def _parse_block_device_mapping_v2(args, image):
 
 
 def _parse_nics(cs, args):
-    if cs.api_version >= api_versions.APIVersion('2.32'):
+    supports_auto_alloc = cs.api_version >= api_versions.APIVersion('2.37')
+    if supports_auto_alloc:
+        err_msg = (_("Invalid nic argument '%s'. Nic arguments must be of "
+                     "the form --nic <auto,none,net-id=net-uuid,"
+                     "net-name=network-name,v4-fixed-ip=ip-addr,"
+                     "v6-fixed-ip=ip-addr,port-id=port-uuid,tag=tag>, "
+                     "with only one of net-id, net-name or port-id "
+                     "specified. Specifying a --nic of auto or none cannot "
+                     "be used with any other --nic value."))
+    elif cs.api_version >= api_versions.APIVersion('2.32'):
         err_msg = (_("Invalid nic argument '%s'. Nic arguments must be of "
                      "the form --nic <net-id=net-uuid,"
                      "net-name=network-name,v4-fixed-ip=ip-addr,"
@@ -202,6 +211,7 @@ def _parse_nics(cs, args):
                      "v6-fixed-ip=ip-addr,port-id=port-uuid>, "
                      "with only one of net-id, net-name or port-id "
                      "specified."))
+    auto_or_none = False
     nics = []
     for nic_str in args.nics:
         nic_info = {"net-id": "", "v4-fixed-ip": "", "v6-fixed-ip": "",
@@ -209,6 +219,13 @@ def _parse_nics(cs, args):
 
         for kv_str in nic_str.split(","):
             try:
+                # handle the special auto/none cases
+                if kv_str in ('auto', 'none'):
+                    if not supports_auto_alloc:
+                        raise exceptions.CommandError(err_msg % nic_str)
+                    nics.append(kv_str)
+                    auto_or_none = True
+                    continue
                 k, v = kv_str.split("=", 1)
             except ValueError:
                 raise exceptions.CommandError(err_msg % nic_str)
@@ -225,6 +242,9 @@ def _parse_nics(cs, args):
             else:
                 raise exceptions.CommandError(err_msg % nic_str)
 
+        if auto_or_none:
+            continue
+
         if nic_info['v4-fixed-ip'] and not netutils.is_valid_ipv4(
                 nic_info['v4-fixed-ip']):
             raise exceptions.CommandError(_("Invalid ipv4 address."))
@@ -238,6 +258,17 @@ def _parse_nics(cs, args):
 
         nics.append(nic_info)
 
+    if nics:
+        if auto_or_none:
+            if len(nics) > 1:
+                raise exceptions.CommandError(err_msg % nic_str)
+            # change the single list entry to a string
+            nics = nics[0]
+    else:
+        # Default to 'auto' if API version >= 2.37 and nothing was specified
+        if supports_auto_alloc:
+            nics = 'auto'
+
     return nics
 
 
@@ -577,6 +608,7 @@ def _boot(cs, args):
     dest='nics',
     default=[],
     start_version='2.32',
+    end_version='2.36',
     help=_("Create a NIC on the server. "
            "Specify option multiple times to create multiple nics. "
            "net-id: attach NIC to network with this UUID "
@@ -588,6 +620,31 @@ def _boot(cs, args):
            "tag: interface metadata tag (optional) "
            "(either port-id or net-id must be provided)."))
 @utils.arg(
+    '--nic',
+    metavar="<auto,none,"
+            "net-id=net-uuid,net-name=network-name,port-id=port-uuid,"
+            "v4-fixed-ip=ip-addr,v6-fixed-ip=ip-addr,tag=tag>",
+    action='append',
+    dest='nics',
+    default=[],
+    start_version='2.37',
+    help=_("Create a NIC on the server. "
+           "Specify option multiple times to create multiple nics unless "
+           "using the special 'auto' or 'none' values. "
+           "auto: automatically allocate network resources if none are "
+           "available. This cannot be specified with any other nic value and "
+           "cannot be specified multiple times. "
+           "none: do not attach a NIC at all. This cannot be specified "
+           "with any other nic value and cannot be specified multiple times. "
+           "net-id: attach NIC to network with a specific UUID. "
+           "net-name: attach NIC to network with this name "
+           "(either port-id or net-id or net-name must be provided), "
+           "v4-fixed-ip: IPv4 fixed address for NIC (optional), "
+           "v6-fixed-ip: IPv6 fixed address for NIC (optional), "
+           "port-id: attach NIC to port with this UUID "
+           "tag: interface metadata tag (optional) "
+           "(either port-id or net-id must be provided)."))
+@utils.arg(
     '--config-drive',
     metavar="<value>",
     dest='config_drive',
diff --git a/releasenotes/notes/microversion-2.37-d03da96406a45e67.yaml b/releasenotes/notes/microversion-2.37-d03da96406a45e67.yaml
new file mode 100644
index 00000000..211a4f9c
--- /dev/null
+++ b/releasenotes/notes/microversion-2.37-d03da96406a45e67.yaml
@@ -0,0 +1,27 @@
+---
+features:
+  - |
+    The 2.37 microversion is now supported. This introduces the following
+    changes:
+
+    * CLI: The **--nic** value for the **nova boot** command now takes two
+           special values, 'auto' and 'none'. If --nic is not specified, the
+           CLI defaults to 'auto'.
+    * Python API: The **nics** kwarg is required when creating a server using
+           the *novaclient.v2.servers.ServerManager.create* API. The **nics**
+           value can be a list of dicts or a string with value 'auto' or
+           'none'.
+
+upgrade:
+  - |
+    With the 2.37 microversion, the **nics** kwarg is required when creating
+    a server using the *novaclient.v2.servers.ServerManager.create* API. The
+    **nics** value can be a list of dicts or an enum string with one of the
+    following values:
+
+    * **auto**: This tells the Compute service to automatically allocate a
+      network for the project if one is not available and then associate
+      an IP from that network with the server. This is the same behavior as
+      passing nics=None before the 2.37 microversion.
+    * **none**: This tells the Compute service to not allocate any networking
+      for the server.