Add required flavor resource

Change-Id: I190dca0ba944d8131ad3f0aedbe5e43eac147192

blazar/manager/exceptions.py

@@ -317,3 +317,8 @@ class InvalidDevice(exceptions.NotAuthorized):
 class HostHavingContainers(exceptions.BlazarException):
     code = 409
     msg_fmt = _("Containers found for host %(host)s")
+
+
+# Flavor plugin related exceptions
+class InvalidFlavor(exceptions.NotAuthorized):
+    msg_fmt = _("Flavor %(flavor)s is not reservable")

blazar/plugins/flavor/flavor_plugin.py

@@ -39,6 +39,10 @@
     cfg.BoolOpt('randomize_host_selection',
             default=False,
             help='Allocate hosts for reservations randomly.'),
+    cfg.StrOpt('placement_reservation_permitted_trait',
+            default=None,
+            help='If set, only permit flavor reservation for flavors with this trait.'),
+
 ]
 
 CONF = cfg.CONF
@@ -142,8 +146,7 @@ def _query_available_hosts(self, start_date, end_date,
         # resource requests, e.g. baremetal vs virtual
         # or missing traits
         if resource_traits:
-            raise mgr_exceptions.NotImplemented(
-                error="Resource traits not supported yet")
+            LOG.warning("Resource traits not supported yet. Ignoring.")
         hosts = db_api.reservable_host_get_all_by_queries([])
 
         # find reservations for each host in our time period
@@ -298,6 +301,14 @@ def _get_flavor_details(self, flavor_id):
         resource_request, resource_traits = \
             self._estimate_flavor_resources(source_flavor)
 
+        if (
+            CONF[self.resource_type].placement_reservation_permitted_trait and
+            resource_traits.get(
+                CONF[self.resource_type].placement_reservation_permitted_trait
+            ) != "required"
+        ):
+                raise mgr_exceptions.InvalidFlavor(flavor=source_flavor["name"])
+
         return (resource_request, resource_traits, source_flavor)
 
     def _estimate_flavor_resources(self, source_flavor):