incubator-airflow/scripts/perf/dags/perf_dag_2.py

# -*- coding: utf-8 -*-
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#   http://www.apache.org/licenses/LICENSE-2.0
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"""
This dag tests performance of simple bash commands executed with Airflow.
"""
from datetime import timedelta

import airflow
from airflow.models import DAG
from airflow.operators.bash_operator import BashOperator

args = {
    'owner': 'Airflow',
    'start_date': airflow.utils.dates.days_ago(3),
}

dag = DAG(
    dag_id='perf_dag_2', default_args=args,
    schedule_interval='@daily',
    dagrun_timeout=timedelta(minutes=60))

task_1 = BashOperator(
    task_id='perf_task_1',
    bash_command='sleep 5; echo "run_id={{ run_id }} | dag_run={{ dag_run }}"',
    dag=dag)

for i in range(2, 5):
    task = BashOperator(
        task_id='perf_task_{}'.format(i),
        bash_command='''
            sleep 5; echo "run_id={{ run_id }} | dag_run={{ dag_run }}"
        ''',
        dag=dag)
    task.set_upstream(task_1)

if __name__ == "__main__":
    dag.cli()