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125 lines
3.7 KiB
125 lines
3.7 KiB
# |
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# Licensed to the Apache Software Foundation (ASF) under one |
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# or more contributor license agreements. See the NOTICE file |
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# distributed with this work for additional information |
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# regarding copyright ownership. The ASF licenses this file |
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# to you under the Apache License, Version 2.0 (the |
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# "License"); you may not use this file except in compliance |
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# with the License. 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, |
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# software distributed under the License is distributed on an |
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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# KIND, either express or implied. See the License for the |
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# specific language governing permissions and limitations |
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# under the License. |
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""" |
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### Tutorial Documentation |
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Documentation that goes along with the Airflow tutorial located |
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[here](https://airflow.apache.org/tutorial.html) |
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""" |
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# [START tutorial] |
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# [START import_module] |
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from datetime import timedelta |
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from textwrap import dedent |
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# The DAG object; we'll need this to instantiate a DAG |
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from airflow import DAG |
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|
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# Operators; we need this to operate! |
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from airflow.operators.bash import BashOperator |
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from airflow.utils.dates import days_ago |
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# [END import_module] |
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|
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# [START default_args] |
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# These args will get passed on to each operator |
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# You can override them on a per-task basis during operator initialization |
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default_args = { |
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"owner": "airflow", |
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"depends_on_past": False, |
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"email": ["airflow@example.com"], |
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"email_on_failure": False, |
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"email_on_retry": False, |
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"retries": 1, |
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"retry_delay": timedelta(minutes=5), |
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# 'queue': 'bash_queue', |
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# 'pool': 'backfill', |
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# 'priority_weight': 10, |
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# 'end_date': datetime(2016, 1, 1), |
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# 'wait_for_downstream': False, |
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# 'dag': dag, |
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# 'sla': timedelta(hours=2), |
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# 'execution_timeout': timedelta(seconds=300), |
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# 'on_failure_callback': some_function, |
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# 'on_success_callback': some_other_function, |
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# 'on_retry_callback': another_function, |
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# 'sla_miss_callback': yet_another_function, |
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# 'trigger_rule': 'all_success' |
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} |
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# [END default_args] |
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# [START instantiate_dag] |
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with DAG( |
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"debug", |
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default_args=default_args, |
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description="A simple tutorial DAG", |
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schedule_interval=None, |
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start_date=days_ago(2), |
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tags=["example"], |
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) as dag: |
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# [END instantiate_dag] |
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cleanup = BashOperator( |
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task_id="cleanup", |
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bash_command="sudo sh /data/scripts/post-scrape.sh -s target -k devops", |
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) |
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# t1, t2 and t3 are examples of tasks created by instantiating operators |
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# [START basic_task] |
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# t1 = BashOperator( |
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# task_id="print_date", |
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# bash_command="date", |
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# ) |
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# t2 = BashOperator( |
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# task_id="sleep", |
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# depends_on_past=False, |
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# bash_command="sleep 5", |
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# retries=3, |
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# ) |
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# # [END basic_task] |
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# # [START documentation] |
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# dag.doc_md = __doc__ |
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cleanup.doc_md = dedent(""" |
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#### Task Documentation |
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You can document your task using the attributes `doc_md` (markdown), |
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`doc` (plain text), `doc_rst`, `doc_json`, `doc_yaml` which gets |
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rendered in the UI's Task Instance Details page. |
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 |
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""") |
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# [END documentation] |
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# [START jinja_template] |
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templated_command = dedent(""" |
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{% for i in range(5) %} |
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echo "{{ ds }}" |
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echo "{{ macros.ds_add(ds, 7)}}" |
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echo "{{ params.my_param }}" |
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{% endfor %} |
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""") |
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t3 = BashOperator( |
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task_id="templated", |
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depends_on_past=False, |
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bash_command=templated_command, |
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params={"my_param": "Parameter I passed in"}, |
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) |
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# [END jinja_template] |
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cleanup |
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# [END tutorial]
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