Ensure router interfaces properly reflect the state

This change ensures the interface states matches the underlying
interfaces states.

Change-Id: I4d15795aadee6ed754799b36b9f9c0e4d9245338
Closes-Bug:1540520

astara_neutron/extensions/routerstatus.py

@@ -17,9 +17,14 @@
 from neutron.api import extensions
 
 from neutron.db.l3_db import Router
+from neutron.db import models_v2
 from astara_neutron.extensions import _authzbase
 
 
+STATUS_ACTIVE = 'ACTIVE'
+STATUS_DOWN = 'DOWN'
+
+
 class RouterstatusResource(_authzbase.ResourceDelegate):
     """This resource is intended as a private API that allows the rug to change
     a router's status (which is normally a read-only attribute)
@@ -52,6 +57,45 @@ class RouterstatusResource(_authzbase.ResourceDelegate):
             'status': router['status']
         }
 
+    def update(self, context, resource, resource_dict):
+        with context.session.begin(subtransactions=True):
+            resource.update(resource_dict)
+            context.session.add(resource)
+
+            # sync logical ports to backing port status
+            for router_port in resource.attached_ports:
+                if router_port.port.status != resource.status:
+                    self._update_port_status(
+                        context,
+                        resource,
+                        router_port.port
+                    )
+                    context.session.add(router_port.port)
+            return self.make_dict(resource)
+
+    def _update_port_status(self, context, router, port):
+        # assume port is down until proven otherwise
+        next_status = STATUS_DOWN
+
+        # find backing ports works with both  ASTARA and AKANDA
+        partial_name = 'A%%:VRRP:%s' % router.id
+
+        query = context.session.query(models_v2.Port)
+        query = query.filter(
+            models_v2.Port.network_id == port.network_id,
+            models_v2.Port.name.like(partial_name)
+        )
+
+        for backing_port in query.all():
+            if not backing_port.device_owner or not backing_port.device_id:
+                continue
+
+            next_status = backing_port.status
+            if next_status != STATUS_ACTIVE:
+                break
+
+        port.status = next_status
+
 
 class Routerstatus(extensions.ExtensionDescriptor):
     """