Add getting info about the Limit in a DNS SDK.

I added this because showing the info lists for a limit as specified in the DNS API documentation is not implemented in the SDK.

Change-Id: I4d7b9a3c0f652f9a07fbf70df35e3c780462514c

doc/source/user/proxies/dns.rst

@@ -69,6 +69,13 @@ Zone Share Operations
   :members: create_zone_share, delete_zone_share, get_zone_share,
             find_zone_share, zone_shares
 
+Limit Operations
+^^^^^^^^^^^^^^^^
+
+.. autoclass:: openstack.dns.v2._proxy.Proxy
+  :noindex:
+  :members: limits
+
 Service Status Operations
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 

doc/source/user/resources/dns/index.rst

@@ -11,4 +11,5 @@ DNS Resources
    v2/zone_share
    v2/floating_ip
    v2/recordset
+   v2/limit
    v2/service_status

doc/source/user/resources/dns/v2/limit.rst

@@ -0,0 +1,12 @@
+openstack.dns.v2.limit
+======================
+
+.. automodule:: openstack.dns.v2.limit
+
+The Limit Class
+---------------
+
+The ``Limit`` class inherits from :class:`~openstack.resource.Resource`.
+
+.. autoclass:: openstack.dns.v2.limit.Limit
+   :members:

openstack/dns/v2/_proxy.py

@@ -11,6 +11,7 @@
 # under the License.
 
 from openstack.dns.v2 import floating_ip as _fip
+from openstack.dns.v2 import limit as _limit
 from openstack.dns.v2 import recordset as _rs
 from openstack.dns.v2 import service_status as _svc_status
 from openstack.dns.v2 import zone as _zone
@@ -24,6 +25,7 @@ from openstack import proxy
 class Proxy(proxy.Proxy):
     _resource_registry = {
         "floating_ip": _fip.FloatingIP,
+        "limits": _limit.Limit,
         "recordset": _rs.Recordset,
         "service_status": _svc_status.ServiceStatus,
         "zone": _zone.Zone,
@@ -658,6 +660,15 @@ class Proxy(proxy.Proxy):
             zone_id=zone_obj.id,
         )
 
+    # ======== Limits ========
+    def limits(self, **query):
+        """Retrieve a generator of limits
+
+        :returns: A generator of limits
+            (:class:`~openstack.dns.v2.limit.Limit`) instances
+        """
+        return self._list(_limit.Limit, **query)
+
     # ======== Service Statuses ========
     def service_statuses(self):
         """Retrieve a generator of service statuses

openstack/dns/v2/limit.py

@@ -0,0 +1,44 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from openstack.dns.v2 import _base
+from openstack import resource
+
+
+class Limit(_base.Resource):
+    """DNS Limit Resource"""
+
+    resource_key = 'limit'
+    base_path = '/limits'
+
+    # capabilities
+    allow_list = True
+
+    #: Properties
+    #: The max amount of items allowed per page
+    max_page_limit = resource.Body('max_page_limit', type=int)
+    #: The max length of a recordset name
+    max_recordset_name_length = resource.Body(
+        'max_recordset_name_length', type=int
+    )
+    #: The max amount of records contained in a recordset
+    max_recordset_records = resource.Body('max_recordset_records', type=int)
+    #: The max length of a zone name
+    max_zone_name_length = resource.Body('max_zone_name_length', type=int)
+    #: The max amount of records in a zone
+    max_zone_records = resource.Body('max_zone_records', type=int)
+    #: The max amount of recordsets per zone
+    max_zone_recordsets = resource.Body('max_zone_recordsets', type=int)
+    #: The max amount of zones for this project
+    max_zones = resource.Body('max_zones', type=int)
+    #: The lowest ttl allowed on this system
+    min_ttl = resource.Body('min_ttl', type=int)

openstack/tests/unit/dns/v2/test_limit.py

@@ -0,0 +1,35 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from openstack.dns.v2 import limit as _limit
+from openstack.tests.unit import base
+
+IDENTIFIER = 'limit'
+EXAMPLE = {
+    "max_page_limit": 1000,
+    "max_recordset_name_length": 255,
+    "max_recordset_records": 20,
+    "max_zone_name_length": 255,
+    "max_zone_records": 500,
+    "max_zone_recordsets": 500,
+    "max_zones": 10,
+    "min_ttl": 100,
+}
+
+
+class TestLimit(base.TestCase):
+    def test_basic(self):
+        sot = _limit.Limit()
+        self.assertEqual('limit', sot.resource_key)
+        self.assertEqual(None, sot.resources_key)
+        self.assertEqual('/limits', sot.base_path)
+        self.assertTrue(sot.allow_list)