blob: 84ddd305830556fcc772f295f5804cef5f911ff8 [file] [log] [blame]
# 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 SDNControllerServiceInstancePolicy(TenantWithContainerPolicy):
model_name = "SDNControllerServiceInstance"
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 SDNControllerServiceInstance.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 = SDNControllerServiceInstance.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("SDNControllerServiceInstance Instance %s is now unused -- deleting" % service_instance.instance)
self.delete_instance(service_instance, service_instance.instance)
else:
self.logger.info("SDNControllerServiceInstance Instance %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(SDNControllerServiceInstancePolicy, 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(SDNControllerServiceInstancePolicy, 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.sdncontroller_vendor.image
def get_flavor(self, service_vendor):
return service_vendor.sdncontroller_vendor.flavor