Source code for airflow.example_dags.example_bash_operator
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"""Example DAG demonstrating the usage of the BashOperator."""
import datetime
import pendulum
from airflow import DAG
from airflow.operators.bash import BashOperator
from airflow.operators.empty import EmptyOperator
with DAG(
dag_id='example_bash_operator',
schedule_interval='0 0 * * *',
start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
catchup=False,
dagrun_timeout=datetime.timedelta(minutes=60),
tags=['example', 'example2'],
params={"example_key": "example_value"},
) as dag:
[docs] run_this_last = EmptyOperator(
task_id='run_this_last',
)
# [START howto_operator_bash]
run_this = BashOperator(
task_id='run_after_loop',
bash_command='echo 1',
)
# [END howto_operator_bash]
run_this >> run_this_last
for i in range(3):
task = BashOperator(
task_id='runme_' + str(i),
bash_command='echo "{{ task_instance_key_str }}" && sleep 1',
)
task >> run_this
# [START howto_operator_bash_template]
also_run_this = BashOperator(
task_id='also_run_this',
bash_command='echo "run_id={{ run_id }} | dag_run={{ dag_run }}"',
)
# [END howto_operator_bash_template]
also_run_this >> run_this_last
# [START howto_operator_bash_skip]
[docs]this_will_skip = BashOperator(
task_id='this_will_skip',
bash_command='echo "hello world"; exit 99;',
dag=dag,
)
# [END howto_operator_bash_skip]
this_will_skip >> run_this_last
if __name__ == "__main__":
dag.cli()