Refactor Promenade Operator
We will move away from the usage of if/else block and will instead make use of inheritance (promenade base operator) and task specific operators in our dags to execute the workflow Change-Id: Id32592d4f5f2d32e479344c7b859493b6bb450cb
This commit is contained in:
Anthony Lin
Scott Hussey
parent
1d920bdbf6
commit
d5e21c4b18
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@ -14,7 +14,11 @@
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from airflow.models import DAG
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from airflow.operators import DryDockOperator
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from airflow.operators import PromenadeOperator
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from airflow.operators import PromenadeCheckEtcdOperator
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from airflow.operators import PromenadeClearLabelsOperator
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from airflow.operators import PromenadeDecommissionNodeOperator
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from airflow.operators import PromenadeDrainNodeOperator
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from airflow.operators import PromenadeShutdownKubeletOperator
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# Location of shiyard.conf
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@ -24,45 +28,44 @@ config_path = '/usr/local/airflow/plugins/shipyard.conf'
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def destroy_server(parent_dag_name, child_dag_name, args):
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'''
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Tear Down Node
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'''
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"""DAG to tear down node
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The DAG will make use of the promenade and drydock operators
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to tear down a target node.
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"""
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dag = DAG(
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'{}.{}'.format(parent_dag_name, child_dag_name),
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default_args=args)
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# Drain Node
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promenade_drain_node = PromenadeOperator(
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promenade_drain_node = PromenadeDrainNodeOperator(
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task_id='promenade_drain_node',
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shipyard_conf=config_path,
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action='promenade_drain_node',
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main_dag_name=parent_dag_name,
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sub_dag_name=child_dag_name,
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dag=dag)
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# Remove Labels
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promenade_remove_labels = PromenadeOperator(
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task_id='promenade_remove_labels',
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# Clear Labels
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promenade_clear_labels = PromenadeClearLabelsOperator(
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task_id='promenade_clear_labels',
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shipyard_conf=config_path,
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action='promenade_remove_labels',
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main_dag_name=parent_dag_name,
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sub_dag_name=child_dag_name,
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dag=dag)
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# Stop Kubelet
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promenade_stop_kubelet = PromenadeOperator(
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task_id='promenade_stop_kubelet',
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# Shutdown Kubelet
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promenade_shutdown_kubelet = PromenadeShutdownKubeletOperator(
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task_id='promenade_shutdown_kubelet',
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shipyard_conf=config_path,
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action='promenade_stop_kubelet',
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main_dag_name=parent_dag_name,
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sub_dag_name=child_dag_name,
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dag=dag)
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# ETCD Sanity Check
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promenade_check_etcd = PromenadeOperator(
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promenade_check_etcd = PromenadeCheckEtcdOperator(
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task_id='promenade_check_etcd',
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shipyard_conf=config_path,
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action='promenade_check_etcd',
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main_dag_name=parent_dag_name,
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sub_dag_name=child_dag_name,
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dag=dag)
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@ -76,20 +79,19 @@ def destroy_server(parent_dag_name, child_dag_name, args):
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sub_dag_name=child_dag_name,
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dag=dag)
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# Delete node from cluster using Promenade
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promenade_delete_node = PromenadeOperator(
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task_id='promenade_delete_node',
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# Decommission node from Kubernetes cluster using Promenade
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promenade_decommission_node = PromenadeDecommissionNodeOperator(
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task_id='promenade_decommission_node',
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shipyard_conf=config_path,
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action='promenade_delete_node',
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main_dag_name=parent_dag_name,
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sub_dag_name=child_dag_name,
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dag=dag)
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# Define dependencies
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promenade_remove_labels.set_upstream(promenade_drain_node)
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promenade_stop_kubelet.set_upstream(promenade_remove_labels)
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promenade_check_etcd.set_upstream(promenade_stop_kubelet)
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promenade_clear_labels.set_upstream(promenade_drain_node)
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promenade_shutdown_kubelet.set_upstream(promenade_clear_labels)
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promenade_check_etcd.set_upstream(promenade_shutdown_kubelet)
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drydock_destroy_node.set_upstream(promenade_check_etcd)
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promenade_delete_node.set_upstream(drydock_destroy_node)
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promenade_decommission_node.set_upstream(drydock_destroy_node)
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return dag
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@ -0,0 +1,126 @@
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# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from airflow.models import BaseOperator
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from airflow.utils.decorators import apply_defaults
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from airflow.plugins_manager import AirflowPlugin
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from airflow.exceptions import AirflowException
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from service_endpoint import ucp_service_endpoint
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from service_token import shipyard_service_token
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class PromenadeBaseOperator(BaseOperator):
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"""Promenade Base Operator
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All promenade related workflow operators will use the promenade
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base operator as the parent and inherit attributes and methods
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from this class
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"""
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@apply_defaults
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def __init__(self,
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main_dag_name=None,
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promenade_svc_endpoint=None,
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promenade_svc_type='kubernetesprovisioner',
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redeploy_server=None,
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shipyard_conf=None,
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sub_dag_name=None,
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svc_token=None,
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workflow_info={},
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xcom_push=True,
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*args, **kwargs):
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"""Initialization of PromenadeBaseOperator object.
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:param main_dag_name: Parent Dag
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:param promenade_svc_endpoint: Promenade Service Endpoint
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:param promenade_svc_type: Promenade Service Type
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:param redeploy_server: Server to be redeployed
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:param shipyard_conf: Path of shipyard.conf
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:param sub_dag_name: Child Dag
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:param svc_token: Keystone Token
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:param workflow_info: Information related to current workflow
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:param xcom_push: xcom usage
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"""
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super(PromenadeBaseOperator, self).__init__(*args,
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**kwargs)
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self.main_dag_name = main_dag_name
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self.promenade_svc_endpoint = promenade_svc_endpoint
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self.promenade_svc_type = promenade_svc_type
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self.redeploy_server = redeploy_server
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self.shipyard_conf = shipyard_conf
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self.sub_dag_name = sub_dag_name
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self.svc_token = svc_token
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self.workflow_info = workflow_info
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self.xcom_push_flag = xcom_push
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def execute(self, context):
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# Execute promenade base function
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self.promenade_base(context)
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# Exeute child function
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self.do_execute()
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@shipyard_service_token
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def promenade_base(self, context):
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# Define task_instance
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task_instance = context['task_instance']
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# Extract information related to current workflow
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# The workflow_info variable will be a dictionary
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# that contains information about the workflow such
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# as action_id, name and other related parameters
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self.workflow_info = task_instance.xcom_pull(
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task_ids='action_xcom', key='action',
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dag_id=self.main_dag_name)
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# Logs uuid of Shipyard action
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logging.info("Executing Shipyard Action %s",
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self.workflow_info['id'])
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# Retrieve information of the server that we want to redeploy
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# if user executes the 'redeploy_server' dag
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if self.workflow_info['dag_id'] == 'redeploy_server':
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self.redeploy_server = self.workflow_info['parameters'].get(
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'server-name')
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if self.redeploy_server:
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logging.info("Server to be redeployed is %s",
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self.redeploy_server)
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else:
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raise AirflowException('%s was unable to retrieve the '
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'server to be redeployed.'
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% self.__class__.__name__)
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# Retrieve promenade endpoint
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self.promenade_svc_endpoint = ucp_service_endpoint(
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self, svc_type=self.promenade_svc_type)
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logging.info("Promenade endpoint is %s",
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self.promenade_svc_endpoint)
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class PromenadeBaseOperatorPlugin(AirflowPlugin):
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"""Creates PromenadeBaseOperator in Airflow."""
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name = 'promenade_base_operator_plugin'
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operators = [PromenadeBaseOperator]
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@ -0,0 +1,52 @@
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# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import time
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from airflow.plugins_manager import AirflowPlugin
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from airflow.exceptions import AirflowException
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from promenade_base_operator import PromenadeBaseOperator
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class PromenadeCheckEtcdOperator(PromenadeBaseOperator):
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"""Promenade Check ETCD Operator
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This operator will trigger promenade to retrieve the current
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state of etcd.
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"""
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def do_execute(self):
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# Placeholder function. Updates will be made when the Promenade
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# API is ready for consumption.
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logging.info("Performing health check on etcd...")
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time.sleep(5)
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check_etcd = True
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if check_etcd:
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logging.info("The etcd cluster is healthy and ready")
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else:
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raise AirflowException('Please check the state of etcd!')
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class PromenadeCheckEtcdOperatorPlugin(AirflowPlugin):
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"""Creates PromenadeCheckEtcdOperator in Airflow."""
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name = 'promenade_check_etcd_operator'
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operators = [PromenadeCheckEtcdOperator]
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@ -0,0 +1,54 @@
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# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import time
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from airflow.plugins_manager import AirflowPlugin
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from airflow.exceptions import AirflowException
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from promenade_base_operator import PromenadeBaseOperator
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class PromenadeClearLabelsOperator(PromenadeBaseOperator):
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"""Promenade Clear Labels Operator
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This operator will trigger promenade to clear the labels on
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the target node
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"""
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def do_execute(self):
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# Placeholder function. Updates will be made when the Promenade
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# API is ready for consumption.
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logging.info("Removing labels on node...")
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time.sleep(5)
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labels_removed = True
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if labels_removed:
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logging.info("Successfully removed labels on %s",
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self.redeploy_server)
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else:
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raise AirflowException('Failed to remove labels on %s!',
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self.redeploy_server)
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class PromenadeClearLabelsOperatorPlugin(AirflowPlugin):
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"""Creates PromenadeClearLabelsOperator in Airflow."""
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name = 'promenade_clear_labels_operator'
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operators = [PromenadeClearLabelsOperator]
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@ -0,0 +1,54 @@
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# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import time
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from airflow.plugins_manager import AirflowPlugin
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from airflow.exceptions import AirflowException
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from promenade_base_operator import PromenadeBaseOperator
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class PromenadeDecommissionNodeOperator(PromenadeBaseOperator):
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"""Promenade Decommission Node Operator
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This operator will trigger promenade to perform steps to
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clean up the target node from the Kubernetes cluster
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"""
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def do_execute(self):
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# Placeholder function. Updates will be made when the Promenade
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# API is ready for consumption.
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logging.info("Decommissioning node from Kubernetes cluster...")
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time.sleep(5)
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decommission_node = True
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if decommission_node:
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logging.info("Succesfully decommissioned node %s",
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self.redeploy_server)
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else:
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raise AirflowException('Failed to decommission node %s!',
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self.redeploy_server)
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class PromenadeDecommissionNodeOperatorPlugin(AirflowPlugin):
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"""Creates PromenadeDecommissionNodeOperator in Airflow."""
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name = 'promenade_decommission_node_operator'
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operators = [PromenadeDecommissionNodeOperator]
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# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import time
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from airflow.plugins_manager import AirflowPlugin
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from airflow.exceptions import AirflowException
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from promenade_base_operator import PromenadeBaseOperator
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class PromenadeDrainNodeOperator(PromenadeBaseOperator):
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"""Promenade Drain Node Operator
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This operator will trigger promenade to drain the target
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node and ensure that the node is no longer the target of
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any pod scheduling. Promenade will evicts or deletes any
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running pod on the node.
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"""
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def do_execute(self):
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# Placeholder function. Updates will be made when the Promenade
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# API is ready for consumption.
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logging.info("Draining node...")
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time.sleep(5)
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node_drained = True
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if node_drained:
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logging.info("Node %s has been successfully drained",
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self.redeploy_server)
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else:
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raise AirflowException('Failed to drain %s!',
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self.redeploy_server)
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class PromenadeDrainNodeOperatorPlugin(AirflowPlugin):
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"""Creates PromenadeDrainNodeOperator in Airflow."""
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name = 'promenade_drain_node_operator'
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operators = [PromenadeDrainNodeOperator]
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@ -1,204 +0,0 @@
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# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import time
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from airflow.models import BaseOperator
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from airflow.utils.decorators import apply_defaults
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from airflow.plugins_manager import AirflowPlugin
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from airflow.exceptions import AirflowException
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from service_endpoint import ucp_service_endpoint
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from service_token import shipyard_service_token
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class PromenadeOperator(BaseOperator):
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"""
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Supports interaction with Promenade
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:param action: Task to perform
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:param main_dag_name: Parent Dag
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:param shipyard_conf: Location of shipyard.conf
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:param sub_dag_name: Child Dag
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"""
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@apply_defaults
|
||||
def __init__(self,
|
||||
action=None,
|
||||
main_dag_name=None,
|
||||
shipyard_conf=None,
|
||||
sub_dag_name=None,
|
||||
svc_token=None,
|
||||
workflow_info={},
|
||||
xcom_push=True,
|
||||
*args, **kwargs):
|
||||
|
||||
super(PromenadeOperator, self).__init__(*args, **kwargs)
|
||||
self.action = action
|
||||
self.main_dag_name = main_dag_name
|
||||
self.shipyard_conf = shipyard_conf
|
||||
self.sub_dag_name = sub_dag_name
|
||||
self.svc_token = svc_token
|
||||
self.workflow_info = workflow_info
|
||||
self.xcom_push_flag = xcom_push
|
||||
|
||||
def execute(self, context):
|
||||
# Initialize Variables
|
||||
check_etcd = False
|
||||
delete_node = False
|
||||
labels_removed = False
|
||||
node_drained = False
|
||||
redeploy_server = None
|
||||
stop_kubelet = False
|
||||
|
||||
# Define task_instance
|
||||
task_instance = context['task_instance']
|
||||
|
||||
# Extract information related to current workflow
|
||||
# The workflow_info variable will be a dictionary
|
||||
# that contains information about the workflow such
|
||||
# as action_id, name and other related parameters
|
||||
workflow_info = task_instance.xcom_pull(
|
||||
task_ids='action_xcom', key='action',
|
||||
dag_id=self.main_dag_name)
|
||||
|
||||
# Logs uuid of action performed by the Operator
|
||||
logging.info("Promenade Operator for action %s", workflow_info['id'])
|
||||
|
||||
# Retrieve information of the server that we want to redeploy if user
|
||||
# executes the 'redeploy_server' dag
|
||||
if workflow_info['dag_id'] == 'redeploy_server':
|
||||
redeploy_server = workflow_info['parameters'].get('server-name')
|
||||
|
||||
if redeploy_server:
|
||||
logging.info("Server to be redeployed is %s", redeploy_server)
|
||||
else:
|
||||
raise AirflowException('Unable to retrieve information of '
|
||||
'node to be redeployed!')
|
||||
|
||||
# Retrieve Endpoint Information
|
||||
svc_type = 'kubernetesprovisioner'
|
||||
promenade_svc_endpoint = ucp_service_endpoint(self,
|
||||
svc_type=svc_type)
|
||||
|
||||
logging.info("Promenade endpoint is %s", promenade_svc_endpoint)
|
||||
|
||||
# Promenade API Call
|
||||
# Drain node using Promenade
|
||||
if self.action == 'promenade_drain_node':
|
||||
node_drained = self.promenade_drain_node(redeploy_server)
|
||||
|
||||
if node_drained:
|
||||
logging.info("Node %s has been successfully drained",
|
||||
redeploy_server)
|
||||
else:
|
||||
raise AirflowException('Failed to drain %s!',
|
||||
redeploy_server)
|
||||
|
||||
# Remove labels using Promenade
|
||||
elif self.action == 'promenade_remove_labels':
|
||||
labels_removed = self.promenade_remove_labels(redeploy_server)
|
||||
|
||||
if labels_removed:
|
||||
logging.info("Successfully removed labels on %s",
|
||||
redeploy_server)
|
||||
else:
|
||||
raise AirflowException('Failed to remove labels on %s!',
|
||||
redeploy_server)
|
||||
|
||||
# Stops kubelet on node using Promenade
|
||||
elif self.action == 'promenade_stop_kubelet':
|
||||
stop_kubelet = self.promenade_stop_kubelet(redeploy_server)
|
||||
|
||||
if stop_kubelet:
|
||||
logging.info("Successfully stopped kubelet on %s",
|
||||
redeploy_server)
|
||||
else:
|
||||
raise AirflowException('Failed to stopped kubelet on %s!',
|
||||
redeploy_server)
|
||||
|
||||
# Performs etcd sanity check using Promenade
|
||||
elif self.action == 'promenade_check_etcd':
|
||||
check_etcd = self.promenade_check_etcd()
|
||||
|
||||
if check_etcd:
|
||||
logging.info("The etcd cluster is healthy and ready")
|
||||
else:
|
||||
raise AirflowException('Please check the state of etcd!')
|
||||
|
||||
# Delete node from cluster using Promenade
|
||||
elif self.action == 'promenade_delete_node':
|
||||
delete_node = self.promenade_delete_node(redeploy_server)
|
||||
|
||||
if delete_node:
|
||||
logging.info("Succesfully deleted node %s from cluster",
|
||||
redeploy_server)
|
||||
else:
|
||||
raise AirflowException('Failed to node %s from cluster!',
|
||||
redeploy_server)
|
||||
|
||||
# No action to perform
|
||||
else:
|
||||
logging.info('No Action to Perform')
|
||||
|
||||
@shipyard_service_token
|
||||
def promenade_drain_node(self, redeploy_server):
|
||||
# Placeholder function. Updates will be made when the Promenade
|
||||
# API is ready for consumption.
|
||||
logging.info("The token is %s", self.svc_token)
|
||||
logging.info("Draining node...")
|
||||
time.sleep(15)
|
||||
|
||||
return True
|
||||
|
||||
@shipyard_service_token
|
||||
def promenade_remove_labels(self, redeploy_server):
|
||||
# Placeholder function. Updates will be made when the Promenade
|
||||
# API is ready for consumption.
|
||||
logging.info("Removing labels on node...")
|
||||
time.sleep(15)
|
||||
|
||||
return True
|
||||
|
||||
@shipyard_service_token
|
||||
def promenade_stop_kubelet(self, redeploy_server):
|
||||
# Placeholder function. Updates will be made when the Promenade
|
||||
# API is ready for consumption.
|
||||
logging.info("Stopping kubelet on node...")
|
||||
time.sleep(15)
|
||||
|
||||
return True
|
||||
|
||||
@shipyard_service_token
|
||||
def promenade_check_etcd(self):
|
||||
# Placeholder function. Updates will be made when the Promenade
|
||||
# API is ready for consumption.
|
||||
logging.info("Performing health check on etcd...")
|
||||
time.sleep(15)
|
||||
|
||||
return True
|
||||
|
||||
@shipyard_service_token
|
||||
def promenade_delete_node(self, redeploy_server):
|
||||
# Placeholder function. Updates will be made when the Promenade
|
||||
# API is ready for consumption.
|
||||
logging.info("Deleting node from cluster...")
|
||||
time.sleep(15)
|
||||
|
||||
return True
|
||||
|
||||
|
||||
class PromenadeOperatorPlugin(AirflowPlugin):
|
||||
name = 'promenade_operator_plugin'
|
||||
operators = [PromenadeOperator]
|
||||
|
|
@ -0,0 +1,54 @@
|
|||
# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
|
||||
#
|
||||
# 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.
|
||||
|
||||
import logging
|
||||
import time
|
||||
|
||||
from airflow.plugins_manager import AirflowPlugin
|
||||
from airflow.exceptions import AirflowException
|
||||
|
||||
from promenade_base_operator import PromenadeBaseOperator
|
||||
|
||||
|
||||
class PromenadeShutdownKubeletOperator(PromenadeBaseOperator):
|
||||
|
||||
"""Promenade Shutdown Kubelet Operator
|
||||
|
||||
This operator will trigger promenade to shut down kubelet
|
||||
on the target node.
|
||||
|
||||
"""
|
||||
|
||||
def do_execute(self):
|
||||
# Placeholder function. Updates will be made when the Promenade
|
||||
# API is ready for consumption.
|
||||
logging.info("Shutting down kubelet on node...")
|
||||
time.sleep(5)
|
||||
|
||||
shutdown_kubelet = True
|
||||
|
||||
if shutdown_kubelet:
|
||||
logging.info("Successfully shut down kubelet on %s",
|
||||
self.redeploy_server)
|
||||
else:
|
||||
raise AirflowException('Failed to shut down kubelet on %s!',
|
||||
self.redeploy_server)
|
||||
|
||||
|
||||
class PromenadeShutdownKubeletOperatorPlugin(AirflowPlugin):
|
||||
|
||||
"""Creates PromenadeShutdownKubeletOperator in Airflow."""
|
||||
|
||||
name = 'promenade_shutdown_kubelet_operator'
|
||||
operators = [PromenadeShutdownKubeletOperator]
|
||||
Loading…
Reference in New Issue