nb: provide lrp_get method

This change adds function and command to get only one logical router
port by name or uuid.

Closes-Bug: #1948947
Change-Id: I8395cc22d7143a53bb507876a62d923ea3874602

ovsdbapp/schema/ovn_northbound/api.py

@@ -547,6 +547,15 @@ class API(api.API, metaclass=abc.ABCMeta):
         :returns:      :class:`Command` with RowView list result
         """
 
+    @abc.abstractmethod
+    def lrp_get(self, port):
+        """Get logical router port for 'port'
+
+        :param port: The name or uuid of the port
+        :type port:  string or uuid.UUID
+        :returns: :class:`Command` with RowView result
+        """
+
     @abc.abstractmethod
     def lrp_set_enabled(self, port, is_enabled):
         """Set administrative state of 'port'

ovsdbapp/schema/ovn_northbound/commands.py

@@ -815,6 +815,10 @@ class LrpListCommand(cmd.ReadOnlyCommand):
         self.result = [rowview.RowView(r) for r in router.ports]
 
 
+class LrpGetCommand(cmd.BaseGetRowCommand):
+    table = 'Logical_Router_Port'
+
+
 class LrpSetEnabledCommand(cmd.BaseCommand):
     def __init__(self, api, port, is_enabled):
         super().__init__(api)

ovsdbapp/schema/ovn_northbound/impl_idl.py

@@ -180,6 +180,9 @@ class OvnNbApiIdlImpl(ovs_idl.Backend, api.API):
     def lrp_list(self, router):
         return cmd.LrpListCommand(self, router)
 
+    def lrp_get(self, port):
+        return cmd.LrpGetCommand(self, port)
+
     def lrp_set_enabled(self, port, is_enabled):
         return cmd.LrpSetEnabledCommand(self, port, is_enabled)
 

ovsdbapp/tests/functional/schema/ovn_northbound/test_impl_idl.py

@@ -1136,6 +1136,18 @@ class TestLogicalRouterPortOps(OvnNorthboundTest):
         self.assertEqual(set(networks), set(lrp.networks))
         return lrp
 
+    def _test_lrp_get(self, col):
+        lrp = self._lrp_add(None)
+        val = getattr(lrp, col)
+        found = self.api.lrp_get(val).execute(check_error=True)
+        self.assertEqual(lrp, found)
+
+    def test_lrp_get_uuid(self):
+        self._test_lrp_get('uuid')
+
+    def test_lrp_get_name(self):
+        self._test_lrp_get('name')
+
     def test_lrp_add(self):
         self._lrp_add(None, 'de:ad:be:ef:4d:ad', ['192.0.2.0/24'])
 

releasenotes/notes/provide-lrp-get-method-a33a99a7f86b827e.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Added function and command to get one logical router port by name or uuid.