[GitHub] [airflow] baolsen commented on a change in pull request #6773: [AIRFLOW-6038] AWS DataSync example_dags added

[GitBox <gi...@apache.org>]

baolsen commented on a change in pull request #6773: [AIRFLOW-6038] AWS DataSync example_dags added
URL: https://github.com/apache/airflow/pull/6773#discussion_r356969219
 
 

 ##########
 File path: airflow/providers/amazon/aws/example_dags/example_datasync_complex.py
 ##########
 @@ -0,0 +1,101 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+"""
+This is an example dag for using `AWSDataSyncOperator` in a more complex manner.
+
+- Try to get a TaskArn. If one exists, update it.
+- If no tasks exist, try to create a new DataSync Task.
+    - If source and destination locations dont exist for the new task, create them first
+- If many tasks exist, raise an Exception
+- After getting or creating a DataSync Task, run it
+
+This DAG relies on the following environment variables:
+
+* SOURCE_LOCATION_URI - Source location URI, usually on premisis SMB or NFS
+* DESTINATION_LOCATION_URI - Destination location URI, usually S3
+* CREATE_TASK_KWARGS - Passed to boto3.create_task(**kwargs)
+* CREATE_SOURCE_LOCATION_KWARGS - Passed to boto3.create_location(**kwargs)
+* CREATE_DESTINATION_LOCATION_KWARGS - Passed to boto3.create_location(**kwargs)
+* UPDATE_TASK_KWARGS - Passed to boto3.update_task(**kwargs)
+"""
+
+import json
+from os import getenv
+
+from airflow import models, utils
+from airflow.providers.amazon.aws.operators.datasync import AWSDataSyncOperator
+
+# [START howto_operator_datasync_complex_args]
+SOURCE_LOCATION_URI = getenv(
+    "SOURCE_LOCATION_URI", "smb://hostname/directory/")
+
+DESTINATION_LOCATION_URI = getenv(
+    "DESTINATION_LOCATION_URI", "s3://mybucket/prefix")
+
+default_create_task_kwargs = '{"Name": "Created by Airflow"}'
+CREATE_TASK_KWARGS = json.loads(
+    getenv("CREATE_TASK_KWARGS", default_create_task_kwargs)
+)
+
+default_create_source_location_kwargs = "{}"
+CREATE_SOURCE_LOCATION_KWARGS = json.loads(
+    getenv("CREATE_SOURCE_LOCATION_KWARGS",
+           default_create_source_location_kwargs)
+)
+
+bucket_access_role_arn = (
+    "arn:aws:iam::11112223344:role/r-11112223344-my-bucket-access-role"
+)
+default_destination_location_kwargs = """\
+{"S3BucketArn": "arn:aws:s3:::mybucket",
+    "S3Config": {"BucketAccessRoleArn": bucket_access_role_arn}
+}"""
+CREATE_DESTINATION_LOCATION_KWARGS = json.loads(
+    getenv("CREATE_DESTINATION_LOCATION_KWARGS",
+           default_destination_location_kwargs)
+)
+
+default_update_task_kwargs = '{"Name": "Updated by Airflow"}'
+UPDATE_TASK_KWARGS = json.loads(
+    getenv("UPDATE_TASK_KWARGS", default_update_task_kwargs)
+)
+
+default_args = {"start_date": utils.dates.days_ago(1)}
+# [END howto_operator_datasync_complex_args]
+
+with models.DAG(
+    "example_datasync_complex",
 
 Review comment:
   Agreed :) I'll change them to "example_1" and "example_2" to make it clearer.

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