[CORD-2516] Implement HSS-DB service and its synchronizer
Change-Id: I3b5185669bf8a4506d4d60b8bc858537f41c640a
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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