diff --git a/xos/synchronizer/model_policies/model_policy_hssdbserviceinstance.py b/xos/synchronizer/model_policies/model_policy_hssdbserviceinstance.py
new file mode 100644
index 0000000..de459ac
--- /dev/null
+++ b/xos/synchronizer/model_policies/model_policy_hssdbserviceinstance.py
@@ -0,0 +1,156 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# 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 synchronizers.new_base.modelaccessor import *
+from synchronizers.new_base.model_policies.model_policy_tenantwithcontainer import TenantWithContainerPolicy, LeastLoadedNodeScheduler
+from synchronizers.new_base.exceptions import *
+
+class HSSDBServiceInstancePolicy(TenantWithContainerPolicy):
+    model_name = "HSSDBServiceInstance"
+
+    def handle_create(self, service_instance):
+        return self.handle_update(service_instance)
+
+    def handle_update(self, service_instance):
+        if (service_instance.link_deleted_count>0) and (not service_instance.provided_links.exists()):
+            self.logger.info("The last provided link has been deleted -- self-destructing.")
+            self.handle_delete(service_instance)
+            if HSSDBServiceInstance.objects.filter(id=service_instance.id).exists():
+                service_instance.delete()
+            else:
+                self.logger.info("Tenant %s is already deleted" % service_instance)
+            return
+
+        self.manage_container(service_instance)
+
+    def handle_delete(self, service_instance):
+        if service_instance.instance and (not service_instance.instance.deleted):
+            all_service_instances_this_instance = HSSDBServiceInstance.objects.filter(instance_id=service_instance.instance.id)
+            other_service_instances_this_instance = [x for x in all_service_instances_this_instance if x.id != service_instance.id]
+            if (not other_service_instances_this_instance):
+                self.logger.info("HSSDBServiceInstance %s is now unused -- deleting" % service_instance.instance)
+                self.delete_instance(service_instance, service_instance.instance)
+            else:
+                self.logger.info("HSSDBServiceInstance %s has %d other service instances attached" % (service_instance.instance, len(other_service_instances_this_instance)))
+
+    def get_service(self, service_instance):
+        service_name = service_instance.owner.leaf_model_name
+        service_class = globals()[service_name]
+        return service_class.objects.get(id=service_instance.owner.id)
+
+    def find_instance_for_instance_tag(self, instance_tag):
+        tags = Tag.objects.filter(name="instance_tag", value=instance_tag)
+        if tags:
+            return tags[0].content_object
+        return None
+
+    def find_or_make_instance_for_instance_tag(self, service_instance):
+        instance_tag = self.get_instance_tag(service_instance)
+        instance = self.find_instance_for_instance_tag(instance_tag)
+        if instance:
+            if instance.no_sync:
+                # if no_sync is still set, then perhaps we failed while saving it and need to retry.
+                self.save_instance(service_instance, instance)
+            return instance
+
+        desired_image = self.get_image(service_instance)
+        desired_flavor = self.get_flavor(service_instance)
+
+        slice = service_instance.owner.slices.first()
+
+        (node, parent) = LeastLoadedNodeScheduler(slice, label=None).pick()
+
+        assert (slice is not None)
+        assert (node is not None)
+        assert (desired_image is not None)
+        assert (service_instance.creator is not None)
+        assert (node.site_deployment.deployment is not None)
+        assert (desired_image is not None)
+
+        instance = Instance(slice=slice,
+                            node=node,
+                            image=desired_image,
+                            creator=service_instance.creator,
+                            deployment=node.site_deployment.deployment,
+                            flavor=desired_flavor,
+                            isolation=slice.default_isolation,
+                            parent=parent)
+
+        self.save_instance(service_instance, instance)
+
+        return instance
+
+    def manage_container(self, service_instance):
+        if service_instance.deleted:
+            return
+
+        if service_instance.instance:
+            # We're good.
+            return
+
+        instance = self.find_or_make_instance_for_instance_tag(service_instance)
+        service_instance.instance = instance
+        # TODO: possible for partial failure here?
+        service_instance.save()
+
+    def delete_instance(self, service_instance, instance):
+        # delete the `instance_tag` tags
+        tags = Tag.objects.filter(service_id=service_instance.owner.id, content_type=instance.self_content_type_id,
+                                  object_id=instance.id, name="instance_tag")
+        for tag in tags:
+            tag.delete()
+
+        tags = Tag.objects.filter(content_type=instance.self_content_type_id, object_id=instance.id,
+                                  name="vm_vrouter_tenant")
+        for tag in tags:
+            address_manager_instances = list(ServiceInstance.objects.filter(id=tag.value))
+            tag.delete()
+
+            # TODO: Potential partial failure
+
+            for address_manager_instance in address_manager_instances:
+                self.logger.info("Deleting address_manager_instance %s" % address_manager_instance)
+                address_manager_instance.delete()
+
+        instance.delete()
+
+    def save_instance(self, service_instance, instance):
+        instance.no_sync = True   # prevent instance from being synced until we're done with it
+        super(HSSDBServiceInstancePolicy, self).save_instance(instance)
+
+        try:
+            if instance.isolation in ["container", "container_vm"]:
+                raise Exception("Not supported")
+
+            instance_tag = self.get_instance_tag(service_instance)
+            if instance_tag:
+                tags = Tag.objects.filter(name="instance_tag", value=instance_tag)
+                if not tags:
+                    tag = Tag(service=service_instance.owner, content_type=instance.self_content_type_id, object_id=instance.id, name="instance_tag", value=str(instance_tag))
+                    tag.save()
+
+            instance.no_sync = False   # allow the synchronizer to run now
+            super(HSSDBServiceInstancePolicy, self).save_instance(instance)
+        except:
+            # need to clean up any failures here
+            raise
+
+    def get_instance_tag(self, service_instance):
+        return '%d'%service_instance.id
+
+    def get_image(self, service_instance):
+        return service_instance.hssdb_vendor.image
+
+    def get_flavor(self, service_vendor):
+        return service_vendor.hssdb_vendor.flavor
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