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BashOperator

Метки: airflow apache airflow

Use the BashOperator to execute commands in a Bash shell.

airflow/example_dags/example_bash_operator.pyVIEW SOURCE

run_this = BashOperator(
    task_id='run_after_loop',
    bash_command='echo 1',
    dag=dag,
)

Templating

You can use Jinja templates to parameterize the bash_command argument.

airflow/example_dags/example_bash_operator.pyVIEW SOURCE

also_run_this = BashOperator(
    task_id='also_run_this',
    bash_command='echo "run_id={{ run_id }} | dag_run={{ dag_run }}"',
    dag=dag,
)

Troubleshooting

Jinja template not found

Add a space after the script name when directly calling a Bash script with the bash_commandargument. This is because Airflow tries to apply a Jinja template to it, which will fail.

t2 = BashOperator(
    task_id='bash_example',

    # This fails with `Jinja template not found` error
    # bash_command="/home/batcher/test.sh",

    # This works (has a space after)
    bash_command="/home/batcher/test.sh ",
    dag=dag)