| # Copyright 2019-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. |
| |
| """ |
| Example AT&T workflow using Airflow |
| """ |
| import json |
| import logging |
| import airflow |
| from datetime import datetime |
| from airflow import DAG |
| from airflow import AirflowException |
| from airflow.operators import PythonOperator |
| from cord_workflow_airflow_extensions.sensors import CORDEventSensor, CORDModelSensor |
| from cord_workflow_airflow_extensions.operators import CORDModelOperator |
| |
| from att_helpers import * |
| from att_service_instance_funcs import * |
| |
| |
| args = { |
| 'start_date': datetime.utcnow(), |
| 'owner': 'ATT', |
| } |
| |
| dag_att = DAG( |
| dag_id='att_workflow_onu', |
| default_args=args, |
| # this dag will be triggered by external systems |
| schedule_interval=None, |
| ) |
| |
| dag_att.doc_md = __doc__ |
| |
| |
| def ONU_event(model_accessor, message, **kwargs): |
| #context = kwargs |
| #run_id = context['dag_run'].run_id |
| |
| logging.info('onu.events: received event', message=message) |
| |
| si = find_or_create_att_si(model_accessor, logging, message) |
| if message['status'] == 'activated': |
| logging.info('onu.events: activated onu', message=message) |
| si.no_sync = False |
| si.uni_port_id = long(message['portNumber']) |
| si.of_dpid = message['deviceId'] |
| si.oper_onu_status = 'ENABLED' |
| si.save_changed_fields(always_update_timestamp=True) |
| elif message['status'] == 'disabled': |
| logging.info('onu.events: disabled onu, resetting the subscriber', value=message) |
| si.oper_onu_status = 'DISABLED' |
| si.save_changed_fields(always_update_timestamp=True) |
| else: |
| logging.warn('onu.events: Unknown status value: %s' % message['status'], value=message) |
| raise AirflowException('onu.events: Unknown status value: %s' % message['status'], value=message) |
| |
| |
| def AUTH_event(model_accessor, message, **kwargs): |
| #context = kwargs |
| #run_id = context['dag_run'].run_id |
| |
| logging.info('authentication.events: Got event for subscriber', message=message) |
| |
| si = find_or_create_att_si(model_accessor, logging, message) |
| logging.debug('authentication.events: Updating service instance', si=si) |
| si.authentication_state = message['authenticationState'] |
| si.save_changed_fields(always_update_timestamp=True) |
| |
| |
| def DHCP_event(model_accessor, message, **kwargs): |
| #context = kwargs |
| #run_id = context['dag_run'].run_id |
| |
| logging.info('dhcp.events: Got event for subscriber', message=message) |
| |
| si = find_or_create_att_si(model_accessor, logging, message) |
| logging.debug('dhcp.events: Updating service instance', si=si) |
| si.dhcp_state = message['messageType'] |
| si.ip_address = message['ipAddress'] |
| si.mac_address = message['macAddress'] |
| si.save_changed_fields(always_update_timestamp=True) |
| |
| |
| def DriverService_event(model_accessor, message, si, **kwargs): |
| #context = kwargs |
| #run_id = context['dag_run'].run_id |
| |
| event_type = message['event_type'] |
| |
| go = False |
| if event_type == 'create': |
| logging.debug('MODEL_POLICY: handle_create for AttWorkflowDriverServiceInstance %s ' % si.id) |
| go = True |
| elif event_type == 'update': |
| logging.debug('MODEL_POLICY: handle_update for AttWorkflowDriverServiceInstance %s ' % |
| (si.id), onu_state=si.admin_onu_state, authentication_state=si.authentication_state) |
| go = True |
| elif event_type == 'delete': |
| pass |
| else: |
| pass |
| |
| if not go: |
| return |
| |
| # handle only create & update events |
| |
| # Changing ONU state can change auth state |
| # Changing auth state can change DHCP state |
| # So need to process in this order |
| process_onu_state(model_accessor, si) |
| process_auth_state(si) |
| process_dhcp_state(si) |
| |
| validate_states(si) |
| |
| # handling the subscriber status |
| # It's a combination of all the other states |
| subscriber = get_subscriber(model_accessor, si.serial_number) |
| if subscriber: |
| update_subscriber(model_accessor, subscriber, si) |
| |
| si.save_changed_fields() |
| |
| |
| onu_event_sensor = CORDEventSensor( |
| task_id='onu_event_sensor', |
| topic='onu.events', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_att |
| ) |
| |
| onu_event_handler = CORDModelOperator( |
| task_id='onu_event_handler', |
| python_callable=ONU_event, |
| cord_event_sensor_task_id='onu_event_sensor', |
| dag=dag_att |
| ) |
| |
| auth_event_sensor = CORDEventSensor( |
| task_id='auth_event_sensor', |
| topic='authentication.events', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_att |
| ) |
| |
| auth_event_handler = CORDModelOperator( |
| task_id='auth_event_handler', |
| python_callable=AUTH_event, |
| cord_event_sensor_task_id='auth_event_sensor', |
| dag=dag_att |
| ) |
| |
| dhcp_event_sensor = CORDEventSensor( |
| task_id='dhcp_event_sensor', |
| topic='dhcp.events', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_att |
| ) |
| |
| dhcp_event_handler = CORDModelOperator( |
| task_id='dhcp_event_handler', |
| python_callable=DHCP_event, |
| cord_event_sensor_task_id='dhcp_event_sensor', |
| dag=dag_att |
| ) |
| |
| att_model_event_sensor1 = CORDModelSensor( |
| task_id='att_model_event_sensor1', |
| model_name='AttWorkflowDriverServiceInstance', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_att |
| ) |
| |
| att_model_event_handler1 = CORDModelOperator( |
| task_id='att_model_event_handler1', |
| python_callable=DriverService_event, |
| cord_event_sensor_task_id='att_model_event_sensor1', |
| dag=dag_att |
| ) |
| |
| |
| onu_event_sensor >> onu_event_handler >> att_model_event_sensor1 << auth_event_handler << auth_event_sensor |
| dhcp_event_sensor >> dhcp_event_handler >> att_model_event_sensor1 |
| att_model_event_sensor1 >> att_model_event_handler1 |