CORD-1972: Basic EPC service with blueprints
Change-Id: Id5c494b1224a85999810eeae151d5d0c3b0148d0
(cherry picked from commit 77ce1afcf57d80c5464f514b0e8ab69316e545d9)
diff --git a/xos/synchronizer/model_policies/model_policy_vepcserviceinstance.py b/xos/synchronizer/model_policies/model_policy_vepcserviceinstance.py
new file mode 100644
index 0000000..566a4b8
--- /dev/null
+++ b/xos/synchronizer/model_policies/model_policy_vepcserviceinstance.py
@@ -0,0 +1,271 @@
+# 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 *
+
+from xosconfig import Config
+from multistructlog import create_logger
+
+log = create_logger(Config().get('logging'))
+blueprints = Config().get('blueprints')
+
+def service_of_service_instance(si):
+ if si.endswith('Tenant'):
+ return si[:-len('Tenant')] + 'Service'
+ elif si.endswith('ServiceInstance'):
+ return si[:-len('ServiceInstance')] + 'Service'
+ else:
+ raise Exception('Could not translate service instance into service: %s'%si)
+
+class VEPCServiceInstancePolicy(TenantWithContainerPolicy):
+ model_name = "VEPCServiceInstance"
+
+ """TODO: Update the following to not be service-specific
+ This code assumes there is only one vendor installed
+ """
+ def configure_service_instance(self, service_instance):
+ if service_instance.leaf_model_name == 'VSPGWUTenant':
+ vendor = VSPGWUVendor.objects.first()
+ if not vendor:
+ raise Exception('No VSPGWU vendors')
+ service_instance.vspgwu_vendor = vendor
+ elif service_instance.leaf_model_name == 'VSPGWCTenant':
+ vendor = VSPGWCVendor.objects.first()
+ if not vendor:
+ raise Exception('No VSPGWC vendors')
+ service_instance.vspgwc_vendor = vendor
+
+ def child_service_instance_from_name(self, name):
+ service_instances = self.obj.child_serviceinstances.all()
+
+ try:
+ service_instance = next(s for s in service_instances if s.leaf_model_name == name)
+ except StopIteration:
+ service_instance = None
+
+ return service_instance
+
+ def get_service_for_service_instance(self, si):
+ service = service_of_service_instance(si)
+ service_class = getattr(Slice().stub, service)
+ service_obj = service_class.objects.first() # There's only one service object
+ return service_obj
+
+ def create_service_instance(si):
+ service = self.get_service_for_service_instance(si)
+ if not service:
+ raise Exception('No service object for %s'%service)
+
+ si_class = getattr(Slice().stub, si)
+ s = si_class(owner = service, name = 'epc-' + si.lower())
+ s.master_serviceinstance = self.obj
+
+ self.configure_service_instance(s)
+ s.save()
+ return s
+
+ def create_link(self, src, dst):
+ src_instance = self.child_service_instance_from_name(src)
+ if not src_instance:
+ src_instance = self.create_service_instance(src)
+
+ dst_instance = self.child_service_instance_from_name(dst)
+ if not dst_instance:
+ dst_instance = self.create_service_instance(dst)
+
+ src_service = self.get_service_for_service_instance(src)
+ dst_service = self.get_service_for_service_instance(dst)
+
+ service_dependency = ServiceDependency.objects.filter(provider_service_id = dst_service.id, subscriber_service_id = src_service.id)
+ if not service_dependency:
+ service_dependency = ServiceDependency(provider_service = dst_service, subscriber_service = src_service)
+ service_dependency.save()
+
+ service_instance_link = ServiceInstanceLink.objects.filter(provider_service_instance_id = dst_instance.id, subscriber_service_instance_id = src_instance.id)
+ if not service_instance_link:
+ service_instance_link = ServiceInstanceLink(provider_service_instance = dst_instance, subscriber_service_instance = src_instance)
+ service_instance_link.save()
+
+ def recursive_create_links(self, blueprint, src):
+ for k, v in blueprint.iteritems():
+ if src:
+ self.create_link(src, k)
+
+ if isinstance(v, dict):
+ self.recursive_create_links(v, k)
+ else:
+ self.create_link(src, k)
+
+ def create_child_services(self, service_instance):
+ self.obj = service_instance
+ # Create service graph based on blueprint
+ chosen_blueprint = service_instance.blueprint
+ try:
+ blueprint = next(b for b in blueprints if b['name'] == chosen_blueprint)
+ except StopIteration:
+ log.error('Chosen blueprint (%s) not found' % chosen_blueprint)
+
+ self.recursive_create_links(blueprint['graph'], None)
+
+ def handle_update(self, service_instance):
+ self.create_child_services(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 VEPCServiceInstance.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 = VEPCServiceInstance.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(
+ "VEPCServiceInstance Instance %s is now unused -- deleting" % service_instance.instance)
+ self.delete_instance(
+ service_instance, service_instance.instance)
+ else:
+ self.logger.info("VEPCServiceInstance 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=flavors[0],
+ 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.volumes = "/etc/dnsmasq.d,/etc/ufw"
+ instance.no_sync = True # prevent instance from being synced until we're done with it
+ super(VEPCServiceInstancePolicy, 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(VEPCServiceInstancePolicy, 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 None
+
+ def get_flavor(self, service_instance):
+ raise None
+