Add support to get overaly_tz id from Tier0 router

This patch add functions to retrieve overlay_tz id
from debug-info of T0 router. To be noted, a T0 router
will and will only has one DR associated with.
In the DR configuration, 'transportId' is either an
one-element list or a NoneType variable.

Change-Id: I1f1f58fbf1a9bd2dcddf75986a8a23621ebd06b1

vmware_nsxlib/tests/unit/v3/test_resources.py

@@ -925,6 +925,46 @@ class LogicalRouterTestCase(BaseTestResource):
              'advertisement/rules' % router_id),
             headers=self.default_headers())
 
+    def test_get_debug_info(self):
+        router = self.get_mocked_resource()
+        router_id = test_constants.FAKE_ROUTER_UUID
+        router.get_debug_info(router_id)
+        test_client.assert_json_call(
+            'get', router,
+            ('https://1.2.3.4/api/v1/logical-routers/%s/'
+             'debug-info?format=text' % router_id),
+            headers=self.default_headers())
+
+    def test_get_transportzone_id_empty(self):
+        # Tier0 router may fail to provide TZ id if it
+        # is not yet connected with any Tier1 router
+        router = self.get_mocked_resource()
+        router_id = test_constants.FAKE_ROUTER_UUID
+        faked_responds = {
+            'componentInfo': [{
+                'componentType': nsx_constants.ROUTER_TYPE_TIER0_DR,
+                'transportZoneId': None
+            }]
+        }
+        with mock.patch.object(router.client, 'get',
+                               return_value=faked_responds):
+            res = router.get_transportzone_id(router_id)
+            self.assertIsNone(res)
+
+    def test_get_transportzone_id(self):
+        router = self.get_mocked_resource()
+        router_id = test_constants.FAKE_ROUTER_UUID
+        faked_responds = {
+            'componentInfo': [{
+                'componentType': nsx_constants.ROUTER_TYPE_TIER0_DR,
+                'transportZoneId': ['faked_id']
+            }]
+        }
+        with mock.patch.object(router.client, 'get',
+                               return_value=faked_responds):
+            res = router.get_transportzone_id(router_id)
+            self.assertEqual('faked_id', res)
+
 
 class LogicalRouterPortTestCase(BaseTestResource):
 

vmware_nsxlib/v3/core_resources.py

@@ -649,6 +649,20 @@ class NsxLibLogicalRouter(utils.NsxLibApiBase):
                     logical_router_id)
         return self.client.get(resource)
 
+    def get_debug_info(self, logical_router_id):
+        resource = ('logical-routers/%s/debug-info?format=text' %
+                    logical_router_id)
+        return self.client.get(resource)
+
+    def get_transportzone_id(self, logical_router_id):
+        res = self.get_debug_info(logical_router_id)
+        for item in res['componentInfo']:
+            if item['componentType'] == nsx_constants.ROUTER_TYPE_TIER0_DR:
+                if item['transportZoneId']:
+                    return item['transportZoneId'][0]
+        LOG.warning('OverlayTransportZone is not yet available on'
+                    ' %s.' % (logical_router_id))
+
     def create(self, display_name, tags, edge_cluster_uuid=None, tier_0=False,
                description=None, transport_zone_id=None, allocation_pool=None):
         # TODO(salv-orlando): If possible do not manage edge clusters

vmware_nsxlib/v3/nsx_constants.py

@@ -39,6 +39,7 @@ BRIDGE_ENDPOINT = "BRIDGEENDPOINT"
 # Router type
 ROUTER_TYPE_TIER0 = "TIER0"
 ROUTER_TYPE_TIER1 = "TIER1"
+ROUTER_TYPE_TIER0_DR = "DISTRIBUTED_ROUTER_TIER0"
 
 LROUTERPORT_UPLINK = "LogicalRouterUpLinkPort"
 LROUTERPORT_DOWNLINK = "LogicalRouterDownLinkPort"